Merge branch 'master' into temp-ui-cpp

The entire interface directory is now compiled as C++ files!

source/blender/blenkernel/BKE_blender_undo.h

@@ -5,6 +5,8 @@
  * \ingroup bke
  */
 
+#include "BKE_undo_system.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -13,8 +15,6 @@ struct Main;
 struct MemFileUndoData;
 struct bContext;
 
-enum eUndoStepDir;
-
 #define BKE_UNDO_STR_MAX 64
 
 struct MemFileUndoData *BKE_memfile_undo_encode(struct Main *bmain,

source/blender/editors/interface/CMakeLists.txt

@@ -27,15 +27,15 @@ set(INC
 )
 
 set(SRC
-  eyedroppers/eyedropper_color.c
-  eyedroppers/eyedropper_colorband.c
-  eyedroppers/eyedropper_datablock.c
-  eyedroppers/eyedropper_depth.c
-  eyedroppers/eyedropper_driver.c
-  eyedroppers/eyedropper_gpencil_color.c
-  eyedroppers/interface_eyedropper.c
+  eyedroppers/eyedropper_color.cc
+  eyedroppers/eyedropper_colorband.cc
+  eyedroppers/eyedropper_datablock.cc
+  eyedroppers/eyedropper_depth.cc
+  eyedroppers/eyedropper_driver.cc
+  eyedroppers/eyedropper_gpencil_color.cc
+  eyedroppers/interface_eyedropper.cc
   interface.cc
-  interface_align.c
+  interface_align.cc
   interface_anim.cc
   interface_button_group.cc
   interface_context_menu.cc
@@ -43,10 +43,10 @@ set(SRC
   interface_drag.cc
   interface_draw.cc
   interface_dropboxes.cc
-  interface_handlers.c
-  interface_icons.c
+  interface_handlers.cc
+  interface_icons.cc
   interface_icons_event.cc
-  interface_layout.c
+  interface_layout.cc
   interface_ops.cc
   interface_panel.cc
   interface_query.cc
@@ -65,11 +65,11 @@ set(SRC
   interface_template_list.cc
   interface_template_search_menu.cc
   interface_template_search_operator.cc
-  interface_templates.c
+  interface_templates.cc
   interface_undo.cc
   interface_utils.cc
-  interface_widgets.c
-  resources.c
+  interface_widgets.cc
+  resources.cc
   view2d.cc
   view2d_draw.cc
   view2d_edge_pan.cc
@@ -81,8 +81,8 @@ set(SRC
   views/interface_view.cc
   views/tree_view.cc
 
-  eyedroppers/eyedropper_intern.h
-  interface_intern.h
+  eyedroppers/eyedropper_intern.hh
+  interface_intern.hh
   interface_regions_intern.hh
 )
 

source/blender/editors/interface/eyedroppers/eyedropper_color.cc

@@ -41,7 +41,7 @@
 
 #include "RNA_define.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "ED_clip.h"
 #include "ED_image.h"
@@ -50,10 +50,10 @@
 
 #include "RE_pipeline.h"
 
-#include "eyedropper_intern.h"
+#include "eyedropper_intern.hh"
 
-typedef struct Eyedropper {
-  struct ColorManagedDisplay *display;
+struct Eyedropper {
+  ColorManagedDisplay *display;
 
   PointerRNA ptr;
   PropertyRNA *prop;
@@ -71,23 +71,24 @@ typedef struct Eyedropper {
   char sample_text[MAX_NAME];
 
   bNode *crypto_node;
-  struct CryptomatteSession *cryptomatte_session;
-} Eyedropper;
+  CryptomatteSession *cryptomatte_session;
+};
 
 static void eyedropper_draw_cb(const wmWindow *window, void *arg)
 {
-  Eyedropper *eye = arg;
+  Eyedropper *eye = static_cast<Eyedropper *>(arg);
   eyedropper_draw_cursor_text_window(window, eye->sample_text);
 }
 
 static bool eyedropper_init(bContext *C, wmOperator *op)
 {
-  Eyedropper *eye = MEM_callocN(sizeof(Eyedropper), __func__);
+  Eyedropper *eye = MEM_cnew<Eyedropper>(__func__);
 
   uiBut *but = UI_context_active_but_prop_get(C, &eye->ptr, &eye->prop, &eye->index);
-  const enum PropertySubType prop_subtype = eye->prop ? RNA_property_subtype(eye->prop) : 0;
+  const enum PropertySubType prop_subtype = eye->prop ? RNA_property_subtype(eye->prop) :
+                                                        PropertySubType(0);
 
-  if ((eye->ptr.data == NULL) || (eye->prop == NULL) ||
+  if ((eye->ptr.data == nullptr) || (eye->prop == nullptr) ||
       (RNA_property_editable(&eye->ptr, eye->prop) == false) ||
       (RNA_property_array_length(&eye->ptr, eye->prop) < 3) ||
       (RNA_property_type(eye->prop) != PROP_FLOAT) ||
@@ -127,18 +128,18 @@ static bool eyedropper_init(bContext *C, wmOperator *op)
 
 static void eyedropper_exit(bContext *C, wmOperator *op)
 {
-  Eyedropper *eye = op->customdata;
+  Eyedropper *eye = static_cast<Eyedropper *>(op->customdata);
   wmWindow *window = CTX_wm_window(C);
   WM_cursor_modal_restore(window);
 
   if (eye->draw_handle_sample_text) {
     WM_draw_cb_exit(window, eye->draw_handle_sample_text);
-    eye->draw_handle_sample_text = NULL;
+    eye->draw_handle_sample_text = nullptr;
   }
 
   if (eye->cryptomatte_session) {
     BKE_cryptomatte_free(eye->cryptomatte_session);
-    eye->cryptomatte_session = NULL;
+    eye->cryptomatte_session = nullptr;
   }
 
   MEM_SAFE_FREE(op->customdata);
@@ -219,11 +220,11 @@ static bool eyedropper_cryptomatte_sample_image_fl(const bNode *node,
 {
   bool success = false;
   Image *image = (Image *)node->id;
-  BLI_assert((image == NULL) || (GS(image->id.name) == ID_IM));
+  BLI_assert((image == nullptr) || (GS(image->id.name) == ID_IM));
   ImageUser *iuser = &crypto->iuser;
 
   if (image && image->type == IMA_TYPE_MULTILAYER) {
-    ImBuf *ibuf = BKE_image_acquire_ibuf(image, iuser, NULL);
+    ImBuf *ibuf = BKE_image_acquire_ibuf(image, iuser, nullptr);
     if (image->rr) {
       LISTBASE_FOREACH (RenderLayer *, render_layer, &image->rr->layers) {
         success = eyedropper_cryptomatte_sample_renderlayer_fl(render_layer, prefix, fpos, r_col);
@@ -232,7 +233,7 @@ static bool eyedropper_cryptomatte_sample_image_fl(const bNode *node,
         }
       }
     }
-    BKE_image_release_ibuf(image, ibuf, NULL);
+    BKE_image_release_ibuf(image, ibuf, nullptr);
   }
   return success;
 }
@@ -243,7 +244,7 @@ static bool eyedropper_cryptomatte_sample_fl(bContext *C,
                                              float r_col[3])
 {
   bNode *node = eye->crypto_node;
-  NodeCryptomatte *crypto = node ? ((NodeCryptomatte *)node->storage) : NULL;
+  NodeCryptomatte *crypto = node ? ((NodeCryptomatte *)node->storage) : nullptr;
 
   if (!crypto) {
     return false;
@@ -264,18 +265,18 @@ static bool eyedropper_cryptomatte_sample_fl(bContext *C,
   float fpos[2] = {-1.0f, -1.0};
   switch (area->spacetype) {
     case SPACE_IMAGE: {
-      SpaceImage *sima = area->spacedata.first;
+      SpaceImage *sima = static_cast<SpaceImage *>(area->spacedata.first);
       ED_space_image_get_position(sima, region, mval, fpos);
       break;
     }
     case SPACE_NODE: {
       Main *bmain = CTX_data_main(C);
-      SpaceNode *snode = area->spacedata.first;
+      SpaceNode *snode = static_cast<SpaceNode *>(area->spacedata.first);
       ED_space_node_get_position(bmain, snode, region, mval, fpos);
       break;
     }
     case SPACE_CLIP: {
-      SpaceClip *sc = area->spacedata.first;
+      SpaceClip *sc = static_cast<SpaceClip *>(area->spacedata.first);
       ED_space_clip_get_position(sc, region, mval, fpos);
       break;
     }
@@ -315,7 +316,7 @@ void eyedropper_color_sample_fl(bContext *C, const int m_xy[2], float r_col[3])
   Main *bmain = CTX_data_main(C);
   wmWindowManager *wm = CTX_wm_manager(C);
   const char *display_device = CTX_data_scene(C)->display_settings.display_device;
-  struct ColorManagedDisplay *display = IMB_colormanagement_display_get_named(display_device);
+  ColorManagedDisplay *display = IMB_colormanagement_display_get_named(display_device);
 
   int mval[2];
   wmWindow *win;
@@ -326,10 +327,10 @@ void eyedropper_color_sample_fl(bContext *C, const int m_xy[2], float r_col[3])
     if (area->spacetype == SPACE_IMAGE) {
       ARegion *region = BKE_area_find_region_xy(area, RGN_TYPE_WINDOW, mval);
       if (region) {
-        SpaceImage *sima = area->spacedata.first;
+        SpaceImage *sima = static_cast<SpaceImage *>(area->spacedata.first);
         const int region_mval[2] = {mval[0] - region->winrct.xmin, mval[1] - region->winrct.ymin};
 
-        if (ED_space_image_color_sample(sima, region, region_mval, r_col, NULL)) {
+        if (ED_space_image_color_sample(sima, region, region_mval, r_col, nullptr)) {
           return;
         }
       }
@@ -337,7 +338,7 @@ void eyedropper_color_sample_fl(bContext *C, const int m_xy[2], float r_col[3])
     else if (area->spacetype == SPACE_NODE) {
       ARegion *region = BKE_area_find_region_xy(area, RGN_TYPE_WINDOW, mval);
       if (region) {
-        SpaceNode *snode = area->spacedata.first;
+        SpaceNode *snode = static_cast<SpaceNode *>(area->spacedata.first);
         const int region_mval[2] = {mval[0] - region->winrct.xmin, mval[1] - region->winrct.ymin};
 
         if (ED_space_node_color_sample(bmain, snode, region, region_mval, r_col)) {
@@ -348,7 +349,7 @@ void eyedropper_color_sample_fl(bContext *C, const int m_xy[2], float r_col[3])
     else if (area->spacetype == SPACE_CLIP) {
       ARegion *region = BKE_area_find_region_xy(area, RGN_TYPE_WINDOW, mval);
       if (region) {
-        SpaceClip *sc = area->spacedata.first;
+        SpaceClip *sc = static_cast<SpaceClip *>(area->spacedata.first);
         const int region_mval[2] = {mval[0] - region->winrct.xmin, mval[1] - region->winrct.ymin};
 
         if (ED_space_clip_color_sample(sc, region, region_mval, r_col)) {
@@ -440,7 +441,7 @@ static void eyedropper_color_sample_text_update(bContext *C, Eyedropper *eye, co
 
 static void eyedropper_cancel(bContext *C, wmOperator *op)
 {
-  Eyedropper *eye = op->customdata;
+  Eyedropper *eye = static_cast<Eyedropper *>(op->customdata);
   if (eye->is_set) {
     eyedropper_color_set(C, eye, eye->init_col);
   }
@@ -495,7 +496,7 @@ static int eyedropper_modal(bContext *C, wmOperator *op, const wmEvent *event)
 }
 
 /* Modal Operator init */
-static int eyedropper_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+static int eyedropper_invoke(bContext *C, wmOperator *op, const wmEvent * /*event*/)
 {
   /* init */
   if (eyedropper_init(C, op)) {
@@ -532,7 +533,7 @@ static bool eyedropper_poll(bContext *C)
 {
   /* Actual test for active button happens later, since we don't
    * know which one is active until mouse over. */
-  return (CTX_wm_window(C) != NULL);
+  return (CTX_wm_window(C) != nullptr);
 }
 
 void UI_OT_eyedropper_color(wmOperatorType *ot)

source/blender/editors/interface/eyedroppers/eyedropper_colorband.cc

@@ -33,16 +33,16 @@
 #include "WM_api.h"
 #include "WM_types.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
-#include "eyedropper_intern.h"
+#include "eyedropper_intern.hh"
 
-typedef struct Colorband_RNAUpdateCb {
+struct Colorband_RNAUpdateCb {
   PointerRNA ptr;
   PropertyRNA *prop;
-} Colorband_RNAUpdateCb;
+};
 
-typedef struct EyedropperColorband {
+struct EyedropperColorband {
   int event_xy_last[2];
   /* Alpha is currently fixed at 1.0, may support in future. */
   float (*color_buffer)[4];
@@ -55,7 +55,7 @@ typedef struct EyedropperColorband {
   PropertyRNA *prop;
   bool is_undo;
   bool is_set;
-} EyedropperColorband;
+};
 
 /* For user-data only. */
 struct EyedropperColorband_Context {
@@ -65,15 +65,15 @@ struct EyedropperColorband_Context {
 
 static bool eyedropper_colorband_init(bContext *C, wmOperator *op)
 {
-  ColorBand *band = NULL;
+  ColorBand *band = nullptr;
 
   uiBut *but = UI_context_active_but_get(C);
 
   PointerRNA rna_update_ptr = PointerRNA_NULL;
-  PropertyRNA *rna_update_prop = NULL;
+  PropertyRNA *rna_update_prop = nullptr;
   bool is_undo = true;
 
-  if (but == NULL) {
+  if (but == nullptr) {
     /* pass */
   }
   else {
@@ -95,8 +95,8 @@ static bool eyedropper_colorband_init(bContext *C, wmOperator *op)
 
   if (!band) {
     const PointerRNA ptr = CTX_data_pointer_get_type(C, "color_ramp", &RNA_ColorRamp);
-    if (ptr.data != NULL) {
-      band = ptr.data;
+    if (ptr.data != nullptr) {
+      band = static_cast<ColorBand *>(ptr.data);
 
       /* Set this to a sub-member of the property to trigger an update. */
       rna_update_ptr = ptr;
@@ -109,9 +109,10 @@ static bool eyedropper_colorband_init(bContext *C, wmOperator *op)
     return false;
   }
 
-  EyedropperColorband *eye = MEM_callocN(sizeof(EyedropperColorband), __func__);
+  EyedropperColorband *eye = MEM_cnew<EyedropperColorband>(__func__);
   eye->color_buffer_alloc = 16;
-  eye->color_buffer = MEM_mallocN(sizeof(*eye->color_buffer) * eye->color_buffer_alloc, __func__);
+  eye->color_buffer = static_cast<float(*)[4]>(
+      MEM_mallocN(sizeof(*eye->color_buffer) * eye->color_buffer_alloc, __func__));
   eye->color_buffer_len = 0;
   eye->color_band = band;
   eye->init_color_band = *eye->color_band;
@@ -134,8 +135,8 @@ static void eyedropper_colorband_sample_point(bContext *C,
     eyedropper_color_sample_fl(C, m_xy, col);
     if (eye->color_buffer_len + 1 == eye->color_buffer_alloc) {
       eye->color_buffer_alloc *= 2;
-      eye->color_buffer = MEM_reallocN(eye->color_buffer,
-                                       sizeof(*eye->color_buffer) * eye->color_buffer_alloc);
+      eye->color_buffer = static_cast<float(*)[4]>(
+          MEM_reallocN(eye->color_buffer, sizeof(*eye->color_buffer) * eye->color_buffer_alloc));
     }
     copy_v4_v4(eye->color_buffer[eye->color_buffer_len], col);
     eye->color_buffer_len += 1;
@@ -146,7 +147,7 @@ static void eyedropper_colorband_sample_point(bContext *C,
 
 static bool eyedropper_colorband_sample_callback(int mx, int my, void *userdata)
 {
-  struct EyedropperColorband_Context *data = userdata;
+  EyedropperColorband_Context *data = static_cast<EyedropperColorband_Context *>(userdata);
   bContext *C = data->context;
   EyedropperColorband *eye = data->eye;
   const int cursor[2] = {mx, my};
@@ -160,7 +161,7 @@ static void eyedropper_colorband_sample_segment(bContext *C,
 {
   /* Since the mouse tends to move rather rapidly we use #BLI_bitmap_draw_2d_line_v2v2i
    * to interpolate between the reported coordinates */
-  struct EyedropperColorband_Context userdata = {C, eye};
+  EyedropperColorband_Context userdata = {C, eye};
   BLI_bitmap_draw_2d_line_v2v2i(
       eye->event_xy_last, m_xy, eyedropper_colorband_sample_callback, &userdata);
 }
@@ -170,16 +171,16 @@ static void eyedropper_colorband_exit(bContext *C, wmOperator *op)
   WM_cursor_modal_restore(CTX_wm_window(C));
 
   if (op->customdata) {
-    EyedropperColorband *eye = op->customdata;
+    EyedropperColorband *eye = static_cast<EyedropperColorband *>(op->customdata);
     MEM_freeN(eye->color_buffer);
     MEM_freeN(eye);
-    op->customdata = NULL;
+    op->customdata = nullptr;
   }
 }
 
 static void eyedropper_colorband_apply(bContext *C, wmOperator *op)
 {
-  EyedropperColorband *eye = op->customdata;
+  EyedropperColorband *eye = static_cast<EyedropperColorband *>(op->customdata);
   /* Always filter, avoids noise in resulting color-band. */
   const bool filter_samples = true;
   BKE_colorband_init_from_table_rgba(
@@ -192,7 +193,7 @@ static void eyedropper_colorband_apply(bContext *C, wmOperator *op)
 
 static void eyedropper_colorband_cancel(bContext *C, wmOperator *op)
 {
-  EyedropperColorband *eye = op->customdata;
+  EyedropperColorband *eye = static_cast<EyedropperColorband *>(op->customdata);
   if (eye->is_set) {
     *eye->color_band = eye->init_color_band;
     if (eye->prop) {
@@ -205,7 +206,7 @@ static void eyedropper_colorband_cancel(bContext *C, wmOperator *op)
 /* main modal status check */
 static int eyedropper_colorband_modal(bContext *C, wmOperator *op, const wmEvent *event)
 {
-  EyedropperColorband *eye = op->customdata;
+  EyedropperColorband *eye = static_cast<EyedropperColorband *>(op->customdata);
   /* handle modal keymap */
   if (event->type == EVT_MODAL_MAP) {
     switch (event->val) {
@@ -242,7 +243,7 @@ static int eyedropper_colorband_modal(bContext *C, wmOperator *op, const wmEvent
 
 static int eyedropper_colorband_point_modal(bContext *C, wmOperator *op, const wmEvent *event)
 {
-  EyedropperColorband *eye = op->customdata;
+  EyedropperColorband *eye = static_cast<EyedropperColorband *>(op->customdata);
   /* handle modal keymap */
   if (event->type == EVT_MODAL_MAP) {
     switch (event->val) {
@@ -280,7 +281,7 @@ static int eyedropper_colorband_point_modal(bContext *C, wmOperator *op, const w
 }
 
 /* Modal Operator init */
-static int eyedropper_colorband_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+static int eyedropper_colorband_invoke(bContext *C, wmOperator *op, const wmEvent * /*event*/)
 {
   /* init */
   if (eyedropper_colorband_init(C, op)) {
@@ -320,7 +321,7 @@ static bool eyedropper_colorband_poll(bContext *C)
     return true;
   }
   const PointerRNA ptr = CTX_data_pointer_get_type(C, "color_ramp", &RNA_ColorRamp);
-  if (ptr.data != NULL) {
+  if (ptr.data != nullptr) {
     return true;
   }
   return false;

source/blender/editors/interface/eyedroppers/eyedropper_datablock.cc

@@ -38,13 +38,13 @@
 #include "ED_space_api.h"
 #include "ED_view3d.h"
 
-#include "eyedropper_intern.h"
-#include "interface_intern.h"
+#include "eyedropper_intern.hh"
+#include "interface_intern.hh"
 
 /**
  * \note #DataDropper is only internal name to avoid confusion with other kinds of eye-droppers.
  */
-typedef struct DataDropper {
+struct DataDropper {
   PointerRNA ptr;
   PropertyRNA *prop;
   short idcode;
@@ -58,13 +58,11 @@ typedef struct DataDropper {
   void *draw_handle_pixel;
   int name_pos[2];
   char name[200];
-} DataDropper;
+};
 
-static void datadropper_draw_cb(const struct bContext *UNUSED(C),
-                                ARegion *UNUSED(region),
-                                void *arg)
+static void datadropper_draw_cb(const bContext * /*C*/, ARegion * /*region*/, void *arg)
 {
-  DataDropper *ddr = arg;
+  DataDropper *ddr = static_cast<DataDropper *>(arg);
   eyedropper_draw_cursor_text_region(ddr->name_pos, ddr->name);
 }
 
@@ -79,11 +77,11 @@ static int datadropper_init(bContext *C, wmOperator *op)
   st = BKE_spacetype_from_id(SPACE_VIEW3D);
   art = BKE_regiontype_from_id(st, RGN_TYPE_WINDOW);
 
-  DataDropper *ddr = MEM_callocN(sizeof(DataDropper), __func__);
+  DataDropper *ddr = MEM_cnew<DataDropper>(__func__);
 
   uiBut *but = UI_context_active_but_prop_get(C, &ddr->ptr, &ddr->prop, &index_dummy);
 
-  if ((ddr->ptr.data == NULL) || (ddr->prop == NULL) ||
+  if ((ddr->ptr.data == nullptr) || (ddr->prop == nullptr) ||
       (RNA_property_editable(&ddr->ptr, ddr->prop) == false) ||
       (RNA_property_type(ddr->prop) != PROP_POINTER)) {
     MEM_freeN(ddr);
@@ -126,7 +124,7 @@ static void datadropper_exit(bContext *C, wmOperator *op)
 
     MEM_freeN(op->customdata);
 
-    op->customdata = NULL;
+    op->customdata = nullptr;
   }
 
   WM_event_add_mousemove(win);
@@ -168,7 +166,7 @@ static void datadropper_id_sample_pt(
 
         if (base) {
           Object *ob = base->object;
-          ID *id = NULL;
+          ID *id = nullptr;
           if (ddr->idcode == ID_OB) {
             id = (ID *)ob;
           }
@@ -208,7 +206,7 @@ static bool datadropper_id_set(bContext *C, DataDropper *ddr, ID *id)
 
   RNA_id_pointer_create(id, &ptr_value);
 
-  RNA_property_pointer_set(&ddr->ptr, ddr->prop, ptr_value, NULL);
+  RNA_property_pointer_set(&ddr->ptr, ddr->prop, ptr_value, nullptr);
 
   RNA_property_update(C, &ddr->ptr, ddr->prop);
 
@@ -220,7 +218,7 @@ static bool datadropper_id_set(bContext *C, DataDropper *ddr, ID *id)
 /* single point sample & set */
 static bool datadropper_id_sample(bContext *C, DataDropper *ddr, const int m_xy[2])
 {
-  ID *id = NULL;
+  ID *id = nullptr;
 
   int mval[2];
   wmWindow *win;
@@ -233,7 +231,7 @@ static bool datadropper_id_sample(bContext *C, DataDropper *ddr, const int m_xy[
 
 static void datadropper_cancel(bContext *C, wmOperator *op)
 {
-  DataDropper *ddr = op->customdata;
+  DataDropper *ddr = static_cast<DataDropper *>(op->customdata);
   datadropper_id_set(C, ddr, ddr->init_id);
   datadropper_exit(C, op);
 }
@@ -287,7 +285,7 @@ static int datadropper_modal(bContext *C, wmOperator *op, const wmEvent *event)
     }
   }
   else if (event->type == MOUSEMOVE) {
-    ID *id = NULL;
+    ID *id = nullptr;
 
     int mval[2];
     wmWindow *win;
@@ -304,7 +302,7 @@ static int datadropper_modal(bContext *C, wmOperator *op, const wmEvent *event)
 }
 
 /* Modal Operator init */
-static int datadropper_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+static int datadropper_invoke(bContext *C, wmOperator *op, const wmEvent * /*event*/)
 {
   /* init */
   if (datadropper_init(C, op)) {
@@ -342,7 +340,7 @@ static bool datadropper_poll(bContext *C)
   uiBut *but;
 
   /* data dropper only supports object data */
-  if ((CTX_wm_window(C) != NULL) &&
+  if ((CTX_wm_window(C) != nullptr) &&
       (but = UI_context_active_but_prop_get(C, &ptr, &prop, &index_dummy)) &&
       (but->type == UI_BTYPE_SEARCH_MENU) && (but->flag & UI_BUT_VALUE_CLEAR)) {
     if (prop && RNA_property_type(prop) == PROP_POINTER) {

source/blender/editors/interface/eyedroppers/eyedropper_depth.cc

@@ -38,13 +38,13 @@
 #include "ED_space_api.h"
 #include "ED_view3d.h"
 
-#include "eyedropper_intern.h"
-#include "interface_intern.h"
+#include "eyedropper_intern.hh"
+#include "interface_intern.hh"
 
 /**
  * \note #DepthDropper is only internal name to avoid confusion with other kinds of eye-droppers.
  */
-typedef struct DepthDropper {
+struct DepthDropper {
   PointerRNA ptr;
   PropertyRNA *prop;
   bool is_undo;
@@ -60,13 +60,11 @@ typedef struct DepthDropper {
   void *draw_handle_pixel;
   int name_pos[2];
   char name[200];
-} DepthDropper;
+};
 
-static void depthdropper_draw_cb(const struct bContext *UNUSED(C),
-                                 ARegion *UNUSED(region),
-                                 void *arg)
+static void depthdropper_draw_cb(const struct bContext * /*C*/, ARegion * /*region*/, void *arg)
 {
-  DepthDropper *ddr = arg;
+  DepthDropper *ddr = static_cast<DepthDropper *>(arg);
   eyedropper_draw_cursor_text_region(ddr->name_pos, ddr->name);
 }
 
@@ -80,17 +78,17 @@ static int depthdropper_init(bContext *C, wmOperator *op)
   st = BKE_spacetype_from_id(SPACE_VIEW3D);
   art = BKE_regiontype_from_id(st, RGN_TYPE_WINDOW);
 
-  DepthDropper *ddr = MEM_callocN(sizeof(DepthDropper), __func__);
+  DepthDropper *ddr = MEM_cnew<DepthDropper>(__func__);
 
   uiBut *but = UI_context_active_but_prop_get(C, &ddr->ptr, &ddr->prop, &index_dummy);
 
   /* fallback to the active camera's dof */
-  if (ddr->prop == NULL) {
+  if (ddr->prop == nullptr) {
     RegionView3D *rv3d = CTX_wm_region_view3d(C);
     if (rv3d && rv3d->persp == RV3D_CAMOB) {
       View3D *v3d = CTX_wm_view3d(C);
       if (v3d->camera && v3d->camera->data &&
-          BKE_id_is_editable(CTX_data_main(C), v3d->camera->data)) {
+          BKE_id_is_editable(CTX_data_main(C), static_cast<const ID *>(v3d->camera->data))) {
         Camera *camera = (Camera *)v3d->camera->data;
         RNA_pointer_create(&camera->id, &RNA_CameraDOFSettings, &camera->dof, &ddr->ptr);
         ddr->prop = RNA_struct_find_property(&ddr->ptr, "focus_distance");
@@ -102,7 +100,7 @@ static int depthdropper_init(bContext *C, wmOperator *op)
     ddr->is_undo = UI_but_flag_is_set(but, UI_BUT_UNDO);
   }
 
-  if ((ddr->ptr.data == NULL) || (ddr->prop == NULL) ||
+  if ((ddr->ptr.data == nullptr) || (ddr->prop == nullptr) ||
       (RNA_property_editable(&ddr->ptr, ddr->prop) == false) ||
       (RNA_property_type(ddr->prop) != PROP_FLOAT)) {
     MEM_freeN(ddr);
@@ -131,7 +129,7 @@ static void depthdropper_exit(bContext *C, wmOperator *op)
 
     MEM_freeN(op->customdata);
 
-    op->customdata = NULL;
+    op->customdata = nullptr;
   }
 }
 
@@ -159,8 +157,8 @@ static void depthdropper_depth_sample_pt(bContext *C,
       ARegion *region = BKE_area_find_region_xy(area, RGN_TYPE_WINDOW, m_xy);
       if (region) {
         struct Depsgraph *depsgraph = CTX_data_depsgraph_pointer(C);
-        View3D *v3d = area->spacedata.first;
-        RegionView3D *rv3d = region->regiondata;
+        View3D *v3d = static_cast<View3D *>(area->spacedata.first);
+        RegionView3D *rv3d = static_cast<RegionView3D *>(region->regiondata);
         /* weak, we could pass in some reference point */
         const float *view_co = v3d->camera ? v3d->camera->object_to_world[3] : rv3d->viewinv[3];
         const int mval[2] = {m_xy[0] - region->winrct.xmin, m_xy[1] - region->winrct.ymin};
@@ -176,7 +174,7 @@ static void depthdropper_depth_sample_pt(bContext *C,
 
         view3d_operator_needs_opengl(C);
 
-        if (ED_view3d_autodist(depsgraph, region, v3d, mval, co, true, NULL)) {
+        if (ED_view3d_autodist(depsgraph, region, v3d, mval, co, true, nullptr)) {
           const float mval_center_fl[2] = {(float)region->winx / 2, (float)region->winy / 2};
           float co_align[3];
 
@@ -244,7 +242,7 @@ static void depthdropper_depth_sample_accum(bContext *C, DepthDropper *ddr, cons
 
 static void depthdropper_cancel(bContext *C, wmOperator *op)
 {
-  DepthDropper *ddr = op->customdata;
+  DepthDropper *ddr = static_cast<DepthDropper *>(op->customdata);
   if (ddr->is_set) {
     depthdropper_depth_set(C, ddr, ddr->init_depth);
   }
@@ -254,7 +252,7 @@ static void depthdropper_cancel(bContext *C, wmOperator *op)
 /* main modal status check */
 static int depthdropper_modal(bContext *C, wmOperator *op, const wmEvent *event)
 {
-  DepthDropper *ddr = (DepthDropper *)op->customdata;
+  DepthDropper *ddr = static_cast<DepthDropper *>(op->customdata);
 
   /* handle modal keymap */
   if (event->type == EVT_MODAL_MAP) {
@@ -299,7 +297,7 @@ static int depthdropper_modal(bContext *C, wmOperator *op, const wmEvent *event)
 }
 
 /* Modal Operator init */
-static int depthdropper_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+static int depthdropper_invoke(bContext *C, wmOperator *op, const wmEvent * /*event*/)
 {
   /* init */
   if (depthdropper_init(C, op)) {
@@ -337,9 +335,9 @@ static bool depthdropper_poll(bContext *C)
   uiBut *but;
 
   /* check if there's an active button taking depth value */
-  if ((CTX_wm_window(C) != NULL) &&
+  if ((CTX_wm_window(C) != nullptr) &&
       (but = UI_context_active_but_prop_get(C, &ptr, &prop, &index_dummy)) &&
-      (but->type == UI_BTYPE_NUM) && (prop != NULL)) {
+      (but->type == UI_BTYPE_NUM) && (prop != nullptr)) {
     if ((RNA_property_type(prop) == PROP_FLOAT) &&
         (RNA_property_subtype(prop) & PROP_UNIT_LENGTH) &&
         (RNA_property_array_check(prop) == false)) {
@@ -351,7 +349,7 @@ static bool depthdropper_poll(bContext *C)
     if (rv3d && rv3d->persp == RV3D_CAMOB) {
       View3D *v3d = CTX_wm_view3d(C);
       if (v3d->camera && v3d->camera->data &&
-          BKE_id_is_editable(CTX_data_main(C), v3d->camera->data)) {
+          BKE_id_is_editable(CTX_data_main(C), static_cast<const ID *>(v3d->camera->data))) {
         return true;
       }
     }

source/blender/editors/interface/eyedroppers/eyedropper_driver.cc

@@ -33,10 +33,10 @@
 
 #include "ED_keyframing.h"
 
-#include "eyedropper_intern.h"
-#include "interface_intern.h"
+#include "eyedropper_intern.hh"
+#include "interface_intern.hh"
 
-typedef struct DriverDropper {
+struct DriverDropper {
   /* Destination property (i.e. where we'll add a driver) */
   PointerRNA ptr;
   PropertyRNA *prop;
@@ -44,15 +44,15 @@ typedef struct DriverDropper {
   bool is_undo;
 
   /* TODO: new target? */
-} DriverDropper;
+};
 
 static bool driverdropper_init(bContext *C, wmOperator *op)
 {
-  DriverDropper *ddr = MEM_callocN(sizeof(DriverDropper), __func__);
+  DriverDropper *ddr = MEM_cnew<DriverDropper>(__func__);
 
   uiBut *but = UI_context_active_but_prop_get(C, &ddr->ptr, &ddr->prop, &ddr->index);
 
-  if ((ddr->ptr.data == NULL) || (ddr->prop == NULL) ||
+  if ((ddr->ptr.data == nullptr) || (ddr->prop == nullptr) ||
       (RNA_property_editable(&ddr->ptr, ddr->prop) == false) ||
       (RNA_property_animateable(&ddr->ptr, ddr->prop) == false) || (but->flag & UI_BUT_DRIVEN)) {
     MEM_freeN(ddr);
@@ -74,14 +74,14 @@ static void driverdropper_exit(bContext *C, wmOperator *op)
 
 static void driverdropper_sample(bContext *C, wmOperator *op, const wmEvent *event)
 {
-  DriverDropper *ddr = (DriverDropper *)op->customdata;
+  DriverDropper *ddr = static_cast<DriverDropper *>(op->customdata);
   uiBut *but = eyedropper_get_property_button_under_mouse(C, event);
 
   const short mapping_type = RNA_enum_get(op->ptr, "mapping_type");
   const short flag = 0;
 
   /* we can only add a driver if we know what RNA property it corresponds to */
-  if (but == NULL) {
+  if (but == nullptr) {
     return;
   }
   /* Get paths for the source. */
@@ -112,7 +112,7 @@ static void driverdropper_sample(bContext *C, wmOperator *op, const wmEvent *eve
       UI_context_update_anim_flag(C);
       DEG_relations_tag_update(CTX_data_main(C));
       DEG_id_tag_update(ddr->ptr.owner_id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY);
-      WM_event_add_notifier(C, NC_ANIMATION | ND_FCURVES_ORDER, NULL); /* XXX */
+      WM_event_add_notifier(C, NC_ANIMATION | ND_FCURVES_ORDER, nullptr); /* XXX */
     }
   }
 
@@ -133,7 +133,7 @@ static void driverdropper_cancel(bContext *C, wmOperator *op)
 /* main modal status check */
 static int driverdropper_modal(bContext *C, wmOperator *op, const wmEvent *event)
 {
-  DriverDropper *ddr = op->customdata;
+  DriverDropper *ddr = static_cast<DriverDropper *>(op->customdata);
 
   /* handle modal keymap */
   if (event->type == EVT_MODAL_MAP) {
@@ -156,7 +156,7 @@ static int driverdropper_modal(bContext *C, wmOperator *op, const wmEvent *event
 }
 
 /* Modal Operator init */
-static int driverdropper_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+static int driverdropper_invoke(bContext *C, wmOperator *op, const wmEvent * /*event*/)
 {
   /* init */
   if (driverdropper_init(C, op)) {

source/blender/editors/interface/eyedroppers/eyedropper_gpencil_color.cc

@@ -46,16 +46,16 @@
 #include "DEG_depsgraph.h"
 #include "DEG_depsgraph_build.h"
 
-#include "eyedropper_intern.h"
-#include "interface_intern.h"
+#include "eyedropper_intern.hh"
+#include "interface_intern.hh"
 
-typedef struct EyedropperGPencil {
+struct EyedropperGPencil {
   struct ColorManagedDisplay *display;
   /** color under cursor RGB */
   float color[3];
   /** Mode */
   int mode;
-} EyedropperGPencil;
+};
 
 /* Helper: Draw status message while the user is running the operator */
 static void eyedropper_gpencil_status_indicators(bContext *C)
@@ -70,7 +70,7 @@ static void eyedropper_gpencil_status_indicators(bContext *C)
 /* Initialize. */
 static bool eyedropper_gpencil_init(bContext *C, wmOperator *op)
 {
-  EyedropperGPencil *eye = MEM_callocN(sizeof(EyedropperGPencil), __func__);
+  EyedropperGPencil *eye = MEM_cnew<EyedropperGPencil>(__func__);
 
   op->customdata = eye;
   Scene *scene = CTX_data_scene(C);
@@ -87,7 +87,7 @@ static bool eyedropper_gpencil_init(bContext *C, wmOperator *op)
 static void eyedropper_gpencil_exit(bContext *C, wmOperator *op)
 {
   /* Clear status message area. */
-  ED_workspace_status_text(C, NULL);
+  ED_workspace_status_text(C, nullptr);
 
   MEM_SAFE_FREE(op->customdata);
 }
@@ -100,7 +100,7 @@ static void eyedropper_add_material(bContext *C,
 {
   Main *bmain = CTX_data_main(C);
   Object *ob = CTX_data_active_object(C);
-  Material *ma = NULL;
+  Material *ma = nullptr;
 
   bool found = false;
 
@@ -108,12 +108,12 @@ static void eyedropper_add_material(bContext *C,
   short *totcol = BKE_object_material_len_p(ob);
   for (short i = 0; i < *totcol; i++) {
     ma = BKE_object_material_get(ob, i + 1);
-    if (ma == NULL) {
+    if (ma == nullptr) {
       continue;
     }
 
     MaterialGPencilStyle *gp_style = ma->gp_style;
-    if (gp_style != NULL) {
+    if (gp_style != nullptr) {
       /* Check stroke color. */
       bool found_stroke = compare_v3v3(gp_style->stroke_rgba, col_conv, 0.01f) &&
                           (gp_style->flag & GP_MATERIAL_STROKE_SHOW);
@@ -134,8 +134,8 @@ static void eyedropper_add_material(bContext *C,
       /* Found existing material. */
       if (found) {
         ob->actcol = i + 1;
-        WM_main_add_notifier(NC_MATERIAL | ND_SHADING_LINKS, NULL);
-        WM_main_add_notifier(NC_SPACE | ND_SPACE_VIEW3D, NULL);
+        WM_main_add_notifier(NC_MATERIAL | ND_SHADING_LINKS, nullptr);
+        WM_main_add_notifier(NC_SPACE | ND_SPACE_VIEW3D, nullptr);
         return;
       }
     }
@@ -147,13 +147,13 @@ static void eyedropper_add_material(bContext *C,
   int idx;
   Material *ma_new = BKE_gpencil_object_material_new(bmain, ob, "Material", &idx);
   WM_main_add_notifier(NC_OBJECT | ND_OB_SHADING, &ob->id);
-  WM_main_add_notifier(NC_MATERIAL | ND_SHADING_LINKS, NULL);
+  WM_main_add_notifier(NC_MATERIAL | ND_SHADING_LINKS, nullptr);
   DEG_relations_tag_update(bmain);
 
-  BLI_assert(ma_new != NULL);
+  BLI_assert(ma_new != nullptr);
 
   MaterialGPencilStyle *gp_style_new = ma_new->gp_style;
-  BLI_assert(gp_style_new != NULL);
+  BLI_assert(gp_style_new != nullptr);
 
   /* Only create Stroke (default option). */
   if (only_stroke) {
@@ -193,13 +193,13 @@ static void eyedropper_add_palette_color(bContext *C, const float col_conv[4])
   Paint *vertexpaint = &gp_vertexpaint->paint;
 
   /* Check for Palette in Draw and Vertex Paint Mode. */
-  if (paint->palette == NULL) {
+  if (paint->palette == nullptr) {
     Palette *palette = BKE_palette_add(bmain, "Grease Pencil");
     id_us_min(&palette->id);
 
     BKE_paint_palette_set(paint, palette);
 
-    if (vertexpaint->palette == NULL) {
+    if (vertexpaint->palette == nullptr) {
       BKE_paint_palette_set(vertexpaint, palette);
     }
   }
@@ -280,7 +280,7 @@ static int eyedropper_gpencil_modal(bContext *C, wmOperator *op, const wmEvent *
 
           /* Create material. */
           eyedropper_gpencil_color_set(C, event, eye);
-          WM_main_add_notifier(NC_GPENCIL | ND_DATA | NA_EDITED, NULL);
+          WM_main_add_notifier(NC_GPENCIL | ND_DATA | NA_EDITED, nullptr);
 
           eyedropper_gpencil_exit(C, op);
           return OPERATOR_FINISHED;
@@ -305,7 +305,7 @@ static int eyedropper_gpencil_modal(bContext *C, wmOperator *op, const wmEvent *
 }
 
 /* Modal Operator init */
-static int eyedropper_gpencil_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+static int eyedropper_gpencil_invoke(bContext *C, wmOperator *op, const wmEvent * /*event*/)
 {
   /* Init. */
   if (eyedropper_gpencil_init(C, op)) {
@@ -337,12 +337,12 @@ static bool eyedropper_gpencil_poll(bContext *C)
 {
   /* Only valid if the current active object is grease pencil. */
   Object *obact = CTX_data_active_object(C);
-  if ((obact == NULL) || (obact->type != OB_GPENCIL)) {
+  if ((obact == nullptr) || (obact->type != OB_GPENCIL)) {
     return false;
   }
 
   /* Test we have a window below. */
-  return (CTX_wm_window(C) != NULL);
+  return (CTX_wm_window(C) != nullptr);
 }
 
 void UI_OT_eyedropper_gpencil_color(wmOperatorType *ot)
@@ -350,7 +350,7 @@ void UI_OT_eyedropper_gpencil_color(wmOperatorType *ot)
   static const EnumPropertyItem items_mode[] = {
       {0, "MATERIAL", 0, "Material", ""},
       {1, "PALETTE", 0, "Palette", ""},
-      {0, NULL, 0, NULL, NULL},
+      {0, nullptr, 0, nullptr, nullptr},
   };
 
   /* identifiers */

source/blender/editors/interface/eyedroppers/eyedropper_intern.hh

@@ -35,7 +35,7 @@ void datadropper_win_area_find(const struct bContext *C,
  *
  * Special check for image or nodes where we MAY have HDR pixels which don't display.
  *
- * \note Exposed by 'eyedropper_intern.h' for use with color band picking.
+ * \note Exposed by 'eyedropper_intern.hh' for use with color band picking.
  */
 void eyedropper_color_sample_fl(bContext *C, const int m_xy[2], float r_col[3]);
 

source/blender/editors/interface/eyedroppers/interface_eyedropper.cc

@@ -19,9 +19,9 @@
 #include "WM_api.h"
 #include "WM_types.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
-#include "eyedropper_intern.h" /* own include */
+#include "eyedropper_intern.hh" /* own include */
 
 /* -------------------------------------------------------------------- */
 /* Keymap
@@ -36,14 +36,14 @@ wmKeyMap *eyedropper_modal_keymap(wmKeyConfig *keyconf)
       {EYE_MODAL_SAMPLE_CONFIRM, "SAMPLE_CONFIRM", 0, "Confirm Sampling", ""},
       {EYE_MODAL_SAMPLE_BEGIN, "SAMPLE_BEGIN", 0, "Start Sampling", ""},
       {EYE_MODAL_SAMPLE_RESET, "SAMPLE_RESET", 0, "Reset Sampling", ""},
-      {0, NULL, 0, NULL, NULL},
+      {0, nullptr, 0, nullptr, nullptr},
   };
 
   wmKeyMap *keymap = WM_modalkeymap_find(keyconf, "Eyedropper Modal Map");
 
   /* This function is called for each space-type, only needs to add map once. */
   if (keymap && keymap->modal_items) {
-    return NULL;
+    return nullptr;
   }
 
   keymap = WM_modalkeymap_ensure(keyconf, "Eyedropper Modal Map", modal_items);
@@ -66,7 +66,7 @@ wmKeyMap *eyedropper_colorband_modal_keymap(wmKeyConfig *keyconf)
       {EYE_MODAL_POINT_SAMPLE, "SAMPLE_SAMPLE", 0, "Sample a Point", ""},
       {EYE_MODAL_POINT_CONFIRM, "SAMPLE_CONFIRM", 0, "Confirm Sampling", ""},
       {EYE_MODAL_POINT_RESET, "SAMPLE_RESET", 0, "Reset Sampling", ""},
-      {0, NULL, 0, NULL, NULL},
+      {0, nullptr, 0, nullptr, nullptr},
   };
 
   wmKeyMap *keymap = WM_modalkeymap_find(keyconf, "Eyedropper ColorRamp PointSampling Map");
@@ -107,7 +107,7 @@ static void eyedropper_draw_cursor_text_ex(const int xy[2], const char *name)
   UI_fontstyle_draw_simple_backdrop(fstyle, xy[0], xy[1] + U.widget_unit, name, col_fg, col_bg);
 }
 
-void eyedropper_draw_cursor_text_window(const struct wmWindow *window, const char *name)
+void eyedropper_draw_cursor_text_window(const wmWindow *window, const char *name)
 {
   if (name[0] == '\0') {
     return;
@@ -133,8 +133,8 @@ uiBut *eyedropper_get_property_button_under_mouse(bContext *C, const wmEvent *ev
 
   uiBut *but = ui_but_find_mouse_over(region, event);
 
-  if (ELEM(NULL, but, but->rnapoin.data, but->rnaprop)) {
-    return NULL;
+  if (ELEM(nullptr, but, but->rnapoin.data, but->rnaprop)) {
+    return nullptr;
   }
   return but;
 }
@@ -146,7 +146,7 @@ void datadropper_win_area_find(
 
   *r_win = CTX_wm_window(C);
   *r_area = BKE_screen_find_area_xy(screen, SPACE_TYPE_ANY, mval);
-  if (*r_area == NULL) {
+  if (*r_area == nullptr) {
     *r_win = WM_window_find_under_cursor(*r_win, mval, r_mval);
     if (*r_win) {
       screen = WM_window_get_active_screen(*r_win);

source/blender/editors/interface/interface.cc

@@ -73,7 +73,7 @@
 
 #include "DEG_depsgraph_query.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 using blender::Vector;
 

source/blender/editors/interface/interface_align.cc

@@ -14,7 +14,7 @@
 
 #include "UI_interface.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "MEM_guardedalloc.h"
 
@@ -41,7 +41,7 @@
  *       This will probably not work in all possible cases,
  *       but not sure we want to support such exotic cases anyway.
  */
-typedef struct ButAlign {
+struct ButAlign {
   uiBut *but;
 
   /* Neighbor buttons */
@@ -56,7 +56,7 @@ typedef struct ButAlign {
   /* Flags, used to mark whether we should 'stitch'
    * the corners of this button with its neighbors' ones. */
   char flags[4];
-} ButAlign;
+};
 
 /* Side-related enums and flags. */
 enum {
@@ -168,7 +168,7 @@ static void block_align_proximity_compute(ButAlign *butal, ButAlign *butal_other
             /* We found an as close or closer neighbor.
              * If both buttons are alignable, we set them as each other neighbors.
              * Else, we have an unalignable one, we need to reset the others matching
-             * neighbor to NULL if its 'proximity distance'
+             * neighbor to nullptr if its 'proximity distance'
              * is really lower with current one.
              *
              * NOTE: We cannot only execute that piece of code in case we found a
@@ -181,10 +181,10 @@ static void block_align_proximity_compute(ButAlign *butal, ButAlign *butal_other
               butal_other->neighbors[side_opp] = butal;
             }
             else if (butal_can_align && (delta < butal->dists[side])) {
-              butal->neighbors[side] = NULL;
+              butal->neighbors[side] = nullptr;
             }
             else if (butal_other_can_align && (delta < butal_other->dists[side_opp])) {
-              butal_other->neighbors[side_opp] = NULL;
+              butal_other->neighbors[side_opp] = nullptr;
             }
             butal->dists[side] = butal_other->dists[side_opp] = delta;
           }
@@ -196,10 +196,10 @@ static void block_align_proximity_compute(ButAlign *butal, ButAlign *butal_other
             const int stitch = STITCH(side);
             const int stitch_opp = STITCH(side_opp);
 
-            if (butal->neighbors[side] == NULL) {
+            if (butal->neighbors[side] == nullptr) {
               butal->neighbors[side] = butal_other;
             }
-            if (butal_other->neighbors[side_opp] == NULL) {
+            if (butal_other->neighbors[side_opp] == nullptr) {
               butal_other->neighbors[side_opp] = butal;
             }
 
@@ -304,8 +304,8 @@ static void block_align_stitch_neighbors(ButAlign *butal,
  */
 static int ui_block_align_butal_cmp(const void *a, const void *b)
 {
-  const ButAlign *butal = a;
-  const ButAlign *butal_other = b;
+  const ButAlign *butal = static_cast<const ButAlign *>(a);
+  const ButAlign *butal_other = static_cast<const ButAlign *>(b);
 
   /* Sort by align group. */
   if (butal->but->alignnr != butal_other->but->alignnr) {
@@ -402,7 +402,8 @@ void ui_block_align_calc(uiBlock *block, const ARegion *region)
     butal_array = butal_array_buf;
   }
   else {
-    butal_array = MEM_mallocN(sizeof(*butal_array) * num_buttons, __func__);
+    butal_array = static_cast<ButAlign *>(
+        MEM_mallocN(sizeof(*butal_array) * num_buttons, __func__));
   }
   memset(butal_array, 0, sizeof(*butal_array) * (size_t)num_buttons);
 
@@ -549,7 +550,7 @@ static bool buts_are_horiz(uiBut *but1, uiBut *but2)
 
 static void ui_block_align_calc_but(uiBut *first, short nr)
 {
-  uiBut *prev, *but = NULL, *next;
+  uiBut *prev, *but = nullptr, *next;
   int flag = 0, cols = 0, rows = 0;
 
   /* auto align */
@@ -569,10 +570,10 @@ static void ui_block_align_calc_but(uiBut *first, short nr)
 
   /* NOTE: manipulation of 'flag' in the loop below is confusing.
    * In some cases it's assigned, other times OR is used. */
-  for (but = first, prev = NULL; but && but->alignnr == nr; prev = but, but = but->next) {
+  for (but = first, prev = nullptr; but && but->alignnr == nr; prev = but, but = but->next) {
     next = but->next;
     if (next && next->alignnr != nr) {
-      next = NULL;
+      next = nullptr;
     }
 
     /* clear old flag */
@@ -593,7 +594,7 @@ static void ui_block_align_calc_but(uiBut *first, short nr)
         }
       }
     }
-    else if (next == NULL) { /* last case */
+    else if (next == nullptr) { /* last case */
       if (prev) {
         if (buts_are_horiz(prev, but)) {
           if (rows == 0) {
@@ -622,7 +623,7 @@ static void ui_block_align_calc_but(uiBut *first, short nr)
             }
             bt = bt->next;
           }
-          if (bt == NULL || bt->alignnr != nr) {
+          if (bt == nullptr || bt->alignnr != nr) {
             flag = UI_BUT_ALIGN_TOP | UI_BUT_ALIGN_RIGHT;
           }
         }
@@ -704,7 +705,7 @@ static void ui_block_align_calc_but(uiBut *first, short nr)
   }
 }
 
-void ui_block_align_calc(uiBlock *block, const struct ARegion *UNUSED(region))
+void ui_block_align_calc(uiBlock *block, const struct ARegion *(region))
 {
   short nr;
 

source/blender/editors/interface/interface_anim.cc

@@ -40,7 +40,7 @@
 #include "WM_api.h"
 #include "WM_types.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 static FCurve *ui_but_get_fcurve(
     uiBut *but, AnimData **adt, bAction **action, bool *r_driven, bool *r_special)

source/blender/editors/interface/interface_button_group.cc

@@ -8,7 +8,7 @@
 
 #include "MEM_guardedalloc.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /* -------------------------------------------------------------------- */
 /** \name Button Groups

source/blender/editors/interface/interface_context_menu.cc

@@ -30,7 +30,7 @@
 
 #include "UI_interface.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "RNA_access.h"
 #include "RNA_prototypes.h"

source/blender/editors/interface/interface_drag.cc

@@ -8,7 +8,7 @@
 
 #include "WM_api.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 void UI_but_drag_set_id(uiBut *but, ID *id)
 {

source/blender/editors/interface/interface_draw.cc

@@ -48,7 +48,7 @@
 #include "UI_interface.h"
 
 /* own include */
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 static int roundboxtype = UI_CNR_ALL;
 

source/blender/editors/interface/interface_icons.cc

@@ -5,9 +5,9 @@
  * \ingroup edinterface
  */
 
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
+#include <cmath>
+#include <cstdlib>
+#include <cstring>
 
 #include "MEM_guardedalloc.h"
 
@@ -62,7 +62,7 @@
 #include "WM_api.h"
 #include "WM_types.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #ifndef WITH_HEADLESS
 #  define ICON_GRID_COLS 26
@@ -74,15 +74,15 @@
 #  define ICON_GRID_H 32
 #endif /* WITH_HEADLESS */
 
-typedef struct IconImage {
+struct IconImage {
   int w;
   int h;
   uint *rect;
   const uchar *datatoc_rect;
   int datatoc_size;
-} IconImage;
+};
 
-typedef void (*VectorDrawFunc)(int x, int y, int w, int h, float alpha);
+using VectorDrawFunc = void (*)(int x, int y, int w, int h, float alpha);
 
 #define ICON_TYPE_PREVIEW 0
 #define ICON_TYPE_COLOR_TEXTURE 1
@@ -95,7 +95,7 @@ typedef void (*VectorDrawFunc)(int x, int y, int w, int h, float alpha);
 #define ICON_TYPE_GPLAYER 8
 #define ICON_TYPE_BLANK 9
 
-typedef struct DrawInfo {
+struct DrawInfo {
   int type;
 
   union {
@@ -123,26 +123,26 @@ typedef struct DrawInfo {
       struct DrawInfo *next;
     } input;
   } data;
-} DrawInfo;
+};
 
-typedef struct IconTexture {
-  struct GPUTexture *tex[2];
+struct IconTexture {
+  GPUTexture *tex[2];
   int num_textures;
   int w;
   int h;
   float invw;
   float invh;
-} IconTexture;
+};
 
-typedef struct IconType {
+struct IconType {
   int type;
   int theme_color;
-} IconType;
+};
 
 /* ******************* STATIC LOCAL VARS ******************* */
 /* Static here to cache results of icon directory scan, so it's not
  * scanning the file-system each time the menu is drawn. */
-static struct ListBase iconfilelist = {NULL, NULL};
+static ListBase iconfilelist = {NULL, NULL};
 static IconTexture icongltex = {{NULL, NULL}, 0, 0, 0, 0.0f, 0.0f};
 
 #ifndef WITH_HEADLESS
@@ -168,12 +168,12 @@ static const IconType icontypes[] = {
 static DrawInfo *def_internal_icon(
     ImBuf *bbuf, int icon_id, int xofs, int yofs, int size, int type, int theme_color)
 {
-  Icon *new_icon = MEM_callocN(sizeof(Icon), "texicon");
+  Icon *new_icon = MEM_cnew<Icon>(__func__);
 
   new_icon->obj = NULL; /* icon is not for library object */
   new_icon->id_type = 0;
 
-  DrawInfo *di = MEM_callocN(sizeof(DrawInfo), "drawinfo");
+  DrawInfo *di = MEM_cnew<DrawInfo>(__func__);
   di->type = type;
 
   if (ELEM(type, ICON_TYPE_COLOR_TEXTURE, ICON_TYPE_MONO_TEXTURE)) {
@@ -184,7 +184,7 @@ static DrawInfo *def_internal_icon(
     di->data.texture.h = size;
   }
   else if (type == ICON_TYPE_BUFFER) {
-    IconImage *iimg = MEM_callocN(sizeof(IconImage), "icon_img");
+    IconImage *iimg = MEM_cnew<IconImage>(__func__);
     iimg->w = size;
     iimg->h = size;
 
@@ -192,7 +192,7 @@ static DrawInfo *def_internal_icon(
     if (bbuf) {
       int y, imgsize;
 
-      iimg->rect = MEM_mallocN(size * size * sizeof(uint), "icon_rect");
+      iimg->rect = static_cast<uint *>(MEM_mallocN(size * size * sizeof(uint), __func__));
 
       /* Here we store the rect in the icon - same as before */
       if (size == bbuf->x && size == bbuf->y && xofs == 0 && yofs == 0) {
@@ -220,12 +220,12 @@ static DrawInfo *def_internal_icon(
 
 static void def_internal_vicon(int icon_id, VectorDrawFunc drawFunc)
 {
-  Icon *new_icon = MEM_callocN(sizeof(Icon), "texicon");
+  Icon *new_icon = MEM_cnew<Icon>("texicon");
 
   new_icon->obj = NULL; /* icon is not for library object */
   new_icon->id_type = 0;
 
-  DrawInfo *di = MEM_callocN(sizeof(DrawInfo), "drawinfo");
+  DrawInfo *di = MEM_cnew<DrawInfo>("drawinfo");
   di->type = ICON_TYPE_VECTOR;
   di->data.vector.func = drawFunc;
 
@@ -244,7 +244,7 @@ static void vicon_keytype_draw_wrapper(
 {
   /* Initialize dummy theme state for Action Editor - where these colors are defined
    * (since we're doing this off-screen, free from any particular space_id). */
-  struct bThemeState theme_state;
+  bThemeState theme_state;
 
   UI_Theme_Store(&theme_state);
   UI_SetTheme(SPACE_ACTION, RGN_TYPE_WINDOW);
@@ -822,7 +822,7 @@ static ImBuf *create_mono_icon_with_border(ImBuf *buf,
           const int offset_write = (sy + by) * buf->x + (sx + bx);
           const float blurred_alpha = blurred_alpha_buffer[blurred_alpha_offset];
           const float border_srgb[4] = {
-              0, 0, 0, MIN2(1.0, blurred_alpha * border_sharpness) * border_intensity};
+              0, 0, 0, MIN2(1.0f, blurred_alpha * border_sharpness) * border_intensity};
 
           const uint color_read = buf->rect[offset_write];
           const uchar *orig_color = (uchar *)&color_read;
@@ -1036,7 +1036,7 @@ static void init_internal_icons(void)
                      vicon_strip_color_draw_library_data_override_noneditable);
 }
 
-static void init_iconfile_list(struct ListBase *list)
+static void init_iconfile_list(ListBase *list)
 {
   BLI_listbase_clear(list);
   const char *icondir = BKE_appdir_folder_id(BLENDER_DATAFILES, "icons");
@@ -1045,7 +1045,7 @@ static void init_iconfile_list(struct ListBase *list)
     return;
   }
 
-  struct direntry *dir;
+  direntry *dir;
   const int totfile = BLI_filelist_dir_contents(icondir, &dir);
 
   int index = 1;
@@ -1083,7 +1083,7 @@ static void init_iconfile_list(struct ListBase *list)
 #  endif /* removed */
 
         /* found a potential icon file, so make an entry for it in the cache list */
-        IconFile *ifile = MEM_callocN(sizeof(IconFile), "IconFile");
+        IconFile *ifile = MEM_cnew<IconFile>(__func__);
 
         BLI_strncpy(ifile->filename, filename, sizeof(ifile->filename));
         ifile->index = index;
@@ -1099,12 +1099,9 @@ static void init_iconfile_list(struct ListBase *list)
   dir = NULL;
 }
 
-static void free_iconfile_list(struct ListBase *list)
+static void free_iconfile_list(ListBase *list)
 {
-  IconFile *ifile = NULL, *next_ifile = NULL;
-
-  for (ifile = list->first; ifile; ifile = next_ifile) {
-    next_ifile = ifile->next;
+  LISTBASE_FOREACH_MUTABLE (IconFile *, ifile, &iconfilelist) {
     BLI_freelinkN(list, ifile);
   }
 }
@@ -1119,10 +1116,7 @@ void UI_icons_reload_internal_textures(void)
 
 int UI_iconfile_get_index(const char *filename)
 {
-  IconFile *ifile;
-  ListBase *list = &(iconfilelist);
-
-  for (ifile = list->first; ifile; ifile = ifile->next) {
+  LISTBASE_FOREACH (const IconFile *, ifile, &iconfilelist) {
     if (BLI_path_cmp(filename, ifile->filename) == 0) {
       return ifile->index;
     }
@@ -1149,7 +1143,7 @@ void UI_icons_free(void)
 
 void UI_icons_free_drawinfo(void *drawinfo)
 {
-  DrawInfo *di = drawinfo;
+  DrawInfo *di = static_cast<DrawInfo *>(drawinfo);
 
   if (di == NULL) {
     return;
@@ -1179,7 +1173,7 @@ static DrawInfo *icon_create_drawinfo(Icon *icon)
 {
   const int icon_data_type = icon->obj_type;
 
-  DrawInfo *di = MEM_callocN(sizeof(DrawInfo), "di_icon");
+  DrawInfo *di = MEM_cnew<DrawInfo>("di_icon");
 
   if (ELEM(icon_data_type, ICON_DATA_ID, ICON_DATA_PREVIEW)) {
     di->type = ICON_TYPE_PREVIEW;
@@ -1206,7 +1200,7 @@ static DrawInfo *icon_create_drawinfo(Icon *icon)
 static DrawInfo *icon_ensure_drawinfo(Icon *icon)
 {
   if (icon->drawinfo) {
-    return icon->drawinfo;
+    return static_cast<DrawInfo *>(icon->drawinfo);
   }
   DrawInfo *di = icon_create_drawinfo(icon);
   icon->drawinfo = di;
@@ -1287,7 +1281,7 @@ int UI_icon_preview_to_render_size(enum eIconSizes size)
 
 /* Create rect for the icon
  */
-static void icon_create_rect(struct PreviewImage *prv_img, enum eIconSizes size)
+static void icon_create_rect(PreviewImage *prv_img, enum eIconSizes size)
 {
   const uint render_size = UI_icon_preview_to_render_size(size);
 
@@ -1301,7 +1295,8 @@ static void icon_create_rect(struct PreviewImage *prv_img, enum eIconSizes size)
     prv_img->h[size] = render_size;
     prv_img->flag[size] |= PRV_CHANGED;
     prv_img->changed_timestamp[size] = 0;
-    prv_img->rect[size] = MEM_callocN(render_size * render_size * sizeof(uint), "prv_rect");
+    prv_img->rect[size] = static_cast<uint *>(
+        MEM_callocN(render_size * render_size * sizeof(uint), "prv_rect"));
   }
 }
 
@@ -1316,7 +1311,7 @@ static void ui_studiolight_icon_job_exec(void *customdata,
   Icon **tmp = (Icon **)customdata;
   Icon *icon = *tmp;
   DrawInfo *di = icon_ensure_drawinfo(icon);
-  StudioLight *sl = icon->obj;
+  StudioLight *sl = static_cast<StudioLight *>(icon->obj);
   BKE_studiolight_preview(di->data.buffer.image->rect, sl, icon->id_type);
 }
 
@@ -1329,7 +1324,7 @@ static void ui_studiolight_kill_icon_preview_job(wmWindowManager *wm, int icon_i
 
 static void ui_studiolight_free_function(StudioLight *sl, void *data)
 {
-  wmWindowManager *wm = data;
+  wmWindowManager *wm = static_cast<wmWindowManager *>(data);
 
   /* Happens if job was canceled or already finished. */
   if (wm == NULL) {
@@ -1355,7 +1350,7 @@ static void ui_studiolight_icon_job_end(void *customdata)
 {
   Icon **tmp = (Icon **)customdata;
   Icon *icon = *tmp;
-  StudioLight *sl = icon->obj;
+  StudioLight *sl = static_cast<StudioLight *>(icon->obj);
   BKE_studiolight_set_free_function(sl, &ui_studiolight_free_function, NULL);
 }
 
@@ -1375,8 +1370,9 @@ void ui_icon_ensure_deferred(const bContext *C, const int icon_id, const bool bi
 
   switch (di->type) {
     case ICON_TYPE_PREVIEW: {
-      ID *id = (icon->id_type != 0) ? icon->obj : NULL;
-      PreviewImage *prv = id ? BKE_previewimg_id_ensure(id) : icon->obj;
+      ID *id = (icon->id_type != 0) ? static_cast<ID *>(icon->obj) : NULL;
+      PreviewImage *prv = id ? BKE_previewimg_id_ensure(id) :
+                               static_cast<PreviewImage *>(icon->obj);
       /* Using jobs for screen previews crashes due to off-screen rendering.
        * XXX: would be nicer if #PreviewImage could store if it supports jobs. */
       const bool use_jobs = !id || (GS(id->name) != ID_SCR);
@@ -1394,20 +1390,24 @@ void ui_icon_ensure_deferred(const bContext *C, const int icon_id, const bool bi
       if (icon->obj_type == ICON_DATA_STUDIOLIGHT) {
         if (di->data.buffer.image == NULL) {
           wmWindowManager *wm = CTX_wm_manager(C);
-          StudioLight *sl = icon->obj;
+          StudioLight *sl = static_cast<StudioLight *>(icon->obj);
           BKE_studiolight_set_free_function(sl, &ui_studiolight_free_function, wm);
-          IconImage *img = MEM_mallocN(sizeof(IconImage), __func__);
+          IconImage *img = MEM_cnew<IconImage>(__func__);
 
           img->w = STUDIOLIGHT_ICON_SIZE;
           img->h = STUDIOLIGHT_ICON_SIZE;
           const size_t size = STUDIOLIGHT_ICON_SIZE * STUDIOLIGHT_ICON_SIZE * sizeof(uint);
-          img->rect = MEM_mallocN(size, __func__);
+          img->rect = static_cast<uint *>(MEM_mallocN(size, __func__));
           memset(img->rect, 0, size);
           di->data.buffer.image = img;
 
-          wmJob *wm_job = WM_jobs_get(
-              wm, CTX_wm_window(C), icon, "StudioLight Icon", 0, WM_JOB_TYPE_STUDIOLIGHT);
-          Icon **tmp = MEM_callocN(sizeof(Icon *), __func__);
+          wmJob *wm_job = WM_jobs_get(wm,
+                                      CTX_wm_window(C),
+                                      icon,
+                                      "StudioLight Icon",
+                                      eWM_JobFlag(0),
+                                      WM_JOB_TYPE_STUDIOLIGHT);
+          Icon **tmp = MEM_cnew<Icon *>(__func__);
           *tmp = icon;
           WM_jobs_customdata_set(wm_job, tmp, MEM_freeN);
           WM_jobs_timer(wm_job, 0.01, 0, NC_WINDOW);
@@ -1478,7 +1478,7 @@ PreviewImage *UI_icon_to_preview(int icon_id)
 
   if (di->type == ICON_TYPE_PREVIEW) {
     PreviewImage *prv = (icon->id_type != 0) ? BKE_previewimg_id_ensure((ID *)icon->obj) :
-                                               icon->obj;
+                                               static_cast<PreviewImage *>(icon->obj);
 
     if (prv) {
       return BKE_previewimg_copy(prv);
@@ -1581,16 +1581,16 @@ static void icon_draw_rect(float x,
  * efficient than simple glUniform calls. */
 #define ICON_DRAW_CACHE_SIZE 16
 
-typedef struct IconDrawCall {
+struct IconDrawCall {
   rctf pos;
   rctf tex;
   float color[4];
-} IconDrawCall;
+};
 
-typedef struct IconTextureDrawCall {
+struct IconTextureDrawCall {
   IconDrawCall drawcall_cache[ICON_DRAW_CACHE_SIZE];
   int calls; /* Number of calls batched together */
-} IconTextureDrawCall;
+};
 
 static struct {
   IconTextureDrawCall normal;
@@ -1616,7 +1616,7 @@ static void icon_draw_cache_texture_flush_ex(GPUTexture *texture,
 
   const int data_binding = GPU_shader_get_uniform_block_binding(shader, "multi_rect_data");
   GPUUniformBuf *ubo = GPU_uniformbuf_create_ex(
-      sizeof(struct MultiRectCallData), texture_draw_calls->drawcall_cache, __func__);
+      sizeof(MultiRectCallData), texture_draw_calls->drawcall_cache, __func__);
   GPU_uniformbuf_bind(ubo, data_binding);
 
   const int img_binding = GPU_shader_get_texture_binding(shader, "image");
@@ -1752,21 +1752,20 @@ static void icon_draw_texture(float x,
     fstyle_small.points *= zoom_factor;
     fstyle_small.points *= 0.8f;
 
-    rcti text_rect = {
-        .xmax = x + UI_UNIT_X * zoom_factor,
-        .xmin = x,
-        .ymax = y,
-        .ymin = y,
-    };
+    rcti text_rect{};
+    text_rect.xmax = x + UI_UNIT_X * zoom_factor;
+    text_rect.xmin = x;
+    text_rect.ymax = y;
+    text_rect.ymin = y;
 
+    uiFontStyleDraw_Params params{};
+    params.align = UI_STYLE_TEXT_RIGHT;
     UI_fontstyle_draw(&fstyle_small,
                       &text_rect,
                       text_overlay->text,
                       sizeof(text_overlay->text),
                       text_color,
-                      &(struct uiFontStyleDraw_Params){
-                          .align = UI_STYLE_TEXT_RIGHT,
-                      });
+                      &params);
     text_width = (float)UI_fontstyle_string_width(&fstyle_small, text_overlay->text) / UI_UNIT_X /
                  zoom_factor;
   }
@@ -1798,14 +1797,19 @@ static void icon_draw_texture(float x,
   const int rect_geom_loc = GPU_shader_get_uniform(shader, "rect_geom");
 
   if (rgb) {
-    GPU_shader_uniform_vector(shader, color_loc, 4, 1, (float[4]){UNPACK3(rgb), alpha});
+    const float color[4] = {rgb[0], rgb[1], rgb[2], alpha};
+    GPU_shader_uniform_vector(shader, color_loc, 4, 1, color);
   }
   else {
-    GPU_shader_uniform_vector(shader, color_loc, 4, 1, (float[4]){alpha, alpha, alpha, alpha});
+    const float color[4] = {alpha, alpha, alpha, alpha};
+    GPU_shader_uniform_vector(shader, color_loc, 4, 1, color);
   }
 
-  GPU_shader_uniform_vector(shader, rect_tex_loc, 4, 1, (float[4]){x1, y1, x2, y2});
-  GPU_shader_uniform_vector(shader, rect_geom_loc, 4, 1, (float[4]){x, y, x + w, y + h});
+  const float tex_color[4] = {x1, y1, x2, y2};
+  const float geom_color[4] = {x, y, x + w, y + h};
+
+  GPU_shader_uniform_vector(shader, rect_tex_loc, 4, 1, tex_color);
+  GPU_shader_uniform_vector(shader, rect_geom_loc, 4, 1, geom_color);
   GPU_shader_uniform_1f(shader, "text_width", text_width);
 
   GPU_texture_bind_ex(texture, GPU_SAMPLER_ICON, img_binding, false);
@@ -1867,7 +1871,7 @@ static void icon_draw_size(float x,
   UI_widgetbase_draw_cache_flush();
 
   if (di->type == ICON_TYPE_IMBUF) {
-    ImBuf *ibuf = icon->obj;
+    ImBuf *ibuf = static_cast<ImBuf *>(icon->obj);
 
     GPU_blend(GPU_BLEND_ALPHA_PREMULT);
     icon_draw_rect(x, y, w, h, aspect, ibuf->x, ibuf->y, ibuf->rect, alpha, desaturate);
@@ -1902,9 +1906,9 @@ static void icon_draw_size(float x,
         IMB_freeImBuf(ibuf);
       }
       if (invert != geom_inverted) {
-        BKE_icon_geom_invert_lightness(icon->obj);
+        BKE_icon_geom_invert_lightness(static_cast<Icon_Geom *>(icon->obj));
       }
-      ibuf = BKE_icon_geom_rasterize(icon->obj, w, h);
+      ibuf = BKE_icon_geom_rasterize(static_cast<Icon_Geom *>(icon->obj), w, h);
       di->data.geom.image_cache = ibuf;
       di->data.geom.inverted = invert;
     }
@@ -1984,7 +1988,7 @@ static void icon_draw_size(float x,
   }
   else if (di->type == ICON_TYPE_PREVIEW) {
     PreviewImage *pi = (icon->id_type != 0) ? BKE_previewimg_id_ensure((ID *)icon->obj) :
-                                              icon->obj;
+                                              static_cast<PreviewImage *>(icon->obj);
 
     if (pi) {
       /* no create icon on this level in code */
@@ -2016,7 +2020,7 @@ static void ui_id_preview_image_render_size(
   /* changed only ever set by dynamic icons */
   if ((pi->flag[size] & PRV_CHANGED) || !pi->rect[size]) {
     /* create the rect if necessary */
-    icon_set_image(C, scene, id, pi, size, use_job);
+    icon_set_image(C, scene, id, pi, eIconSizes(size), use_job);
 
     pi->flag[size] &= ~PRV_CHANGED;
   }
@@ -2045,8 +2049,8 @@ void UI_icon_render_id(
   /* For objects, first try if a preview can created via the object data. */
   if (GS(id->name) == ID_OB) {
     Object *ob = (Object *)id;
-    if (ED_preview_id_is_supported(ob->data)) {
-      id_to_render = ob->data;
+    if (ED_preview_id_is_supported(static_cast<const ID *>(ob->data))) {
+      id_to_render = static_cast<ID *>(ob->data);
     }
   }
 
@@ -2065,7 +2069,7 @@ static void ui_id_icon_render(const bContext *C, ID *id, bool use_jobs)
     return;
   }
 
-  for (enum eIconSizes i = 0; i < NUM_ICON_SIZES; i++) {
+  for (int i = 0; i < NUM_ICON_SIZES; i++) {
     ui_id_preview_image_render_size(C, NULL, id, pi, i, use_jobs);
   }
 }
@@ -2112,7 +2116,7 @@ static int ui_id_brush_get_icon(const bContext *C, ID *id)
     }
     else if (space_type == SPACE_IMAGE) {
       if (area->spacetype == space_type) {
-        const SpaceImage *sima = area->spacedata.first;
+        const SpaceImage *sima = static_cast<const SpaceImage *>(area->spacedata.first);
         if (sima->mode == SI_MODE_PAINT) {
           paint_mode = PAINT_MODE_TEXTURE_2D;
         }
@@ -2310,16 +2314,16 @@ int UI_icon_from_rnaptr(const bContext *C, PointerRNA *ptr, int rnaicon, const b
     id = ptr->owner_id;
   }
   else if (RNA_struct_is_a(ptr->type, &RNA_MaterialSlot)) {
-    id = RNA_pointer_get(ptr, "material").data;
+    id = static_cast<ID *>(RNA_pointer_get(ptr, "material").data);
   }
   else if (RNA_struct_is_a(ptr->type, &RNA_TextureSlot)) {
-    id = RNA_pointer_get(ptr, "texture").data;
+    id = static_cast<ID *>(RNA_pointer_get(ptr, "texture").data);
   }
   else if (RNA_struct_is_a(ptr->type, &RNA_FileBrowserFSMenuEntry)) {
     return RNA_int_get(ptr, "icon");
   }
   else if (RNA_struct_is_a(ptr->type, &RNA_DynamicPaintSurface)) {
-    DynamicPaintSurface *surface = ptr->data;
+    DynamicPaintSurface *surface = static_cast<DynamicPaintSurface *>(ptr->data);
 
     if (surface->format == MOD_DPAINT_SURFACE_F_PTEX) {
       return ICON_SHADING_TEXTURE;
@@ -2332,7 +2336,7 @@ int UI_icon_from_rnaptr(const bContext *C, PointerRNA *ptr, int rnaicon, const b
     }
   }
   else if (RNA_struct_is_a(ptr->type, &RNA_StudioLight)) {
-    StudioLight *sl = ptr->data;
+    StudioLight *sl = static_cast<StudioLight *>(ptr->data);
     switch (sl->flag & STUDIOLIGHT_FLAG_ORIENTATIONS) {
       case STUDIOLIGHT_TYPE_STUDIO:
         return sl->icon_id_irradiance;
@@ -2550,7 +2554,7 @@ ImBuf *UI_icon_alert_imbuf_get(eAlertIcon icon)
   return NULL;
 #else
   const int ALERT_IMG_SIZE = 256;
-  icon = MIN2(icon, ALERT_ICON_MAX - 1);
+  icon = eAlertIcon(MIN2(icon, ALERT_ICON_MAX - 1));
   const int left = icon * ALERT_IMG_SIZE;
   const rcti crop = {left, left + ALERT_IMG_SIZE - 1, 0, ALERT_IMG_SIZE - 1};
   ImBuf *ibuf = IMB_ibImageFromMemory((const uchar *)datatoc_alert_icons_png,

source/blender/editors/interface/interface_icons_event.cc

@@ -18,7 +18,7 @@
 
 #include "UI_interface.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 static void icon_draw_rect_input_text(
     const rctf *rect, const float color[4], const char *str, float font_size, float v_offset)

source/blender/editors/interface/interface_ops.cc

@@ -48,7 +48,7 @@
 
 #include "UI_interface.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "WM_api.h"
 #include "WM_types.h"

source/blender/editors/interface/interface_panel.cc

@@ -48,7 +48,7 @@
 #include "GPU_matrix.h"
 #include "GPU_state.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /* -------------------------------------------------------------------- */
 /** \name Defines & Structs

source/blender/editors/interface/interface_query.cc

@@ -19,7 +19,7 @@
 
 #include "RNA_access.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "WM_api.h"
 #include "WM_types.h"

source/blender/editors/interface/interface_region_color_picker.cc

@@ -34,7 +34,7 @@
 
 #include "IMB_colormanagement.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 enum ePickerType {
   PICKER_TYPE_RGB = 0,

source/blender/editors/interface/interface_region_hud.cc

@@ -36,7 +36,7 @@
 #include "ED_undo.h"
 
 #include "GPU_framebuffer.h"
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /* -------------------------------------------------------------------- */
 /** \name Utilities

source/blender/editors/interface/interface_region_menu_pie.cc

@@ -36,7 +36,7 @@
 
 #include "ED_screen.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 #include "interface_regions_intern.hh"
 
 /* -------------------------------------------------------------------- */

source/blender/editors/interface/interface_region_menu_popup.cc

@@ -39,7 +39,7 @@
 
 #include "ED_screen.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 #include "interface_regions_intern.hh"
 
 /* -------------------------------------------------------------------- */

source/blender/editors/interface/interface_region_popover.cc

@@ -45,7 +45,7 @@
 
 #include "UI_interface.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 #include "interface_regions_intern.hh"
 
 /* -------------------------------------------------------------------- */

source/blender/editors/interface/interface_region_popup.cc

@@ -30,7 +30,7 @@
 
 #include "ED_screen.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 #include "interface_regions_intern.hh"
 
 /* -------------------------------------------------------------------- */

source/blender/editors/interface/interface_region_search.cc

@@ -41,7 +41,7 @@
 #include "ED_screen.h"
 
 #include "GPU_state.h"
-#include "interface_intern.h"
+#include "interface_intern.hh"
 #include "interface_regions_intern.hh"
 
 #define MENU_BORDER int(0.3f * U.widget_unit)

source/blender/editors/interface/interface_region_tooltip.cc

@@ -52,7 +52,7 @@
 
 #include "ED_screen.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 #include "interface_regions_intern.hh"
 
 #define UI_TIP_PAD_FAC 1.3f

source/blender/editors/interface/interface_style.cc

@@ -30,7 +30,7 @@
 
 #include "ED_datafiles.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #ifdef WIN32
 #  include "BLI_math_base.h" /* M_PI */

source/blender/editors/interface/interface_template_asset_view.cc

@@ -28,7 +28,7 @@
 #include "WM_api.h"
 #include "WM_types.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 struct AssetViewListData {
   AssetLibraryReference asset_library_ref;

source/blender/editors/interface/interface_template_list.cc

@@ -30,7 +30,7 @@
 
 #include "WM_api.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /**
  * The validated data that was passed to #uiTemplateList (typically through Python).

source/blender/editors/interface/interface_template_search_menu.cc

@@ -47,7 +47,7 @@
 #include "WM_types.h"
 
 #include "UI_interface.h"
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /* For key-map item access. */
 #include "wm_event_system.h"

source/blender/editors/interface/interface_template_search_operator.cc

@@ -28,7 +28,7 @@
 #include "WM_types.h"
 
 #include "UI_interface.h"
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /* -------------------------------------------------------------------- */
 /** \name Operator Search Template Implementation

source/blender/editors/interface/interface_undo.cc

@@ -15,7 +15,7 @@
 
 #include "MEM_guardedalloc.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /* -------------------------------------------------------------------- */
 /** \name Text Field Undo Stack

source/blender/editors/interface/interface_utils.cc

@@ -40,7 +40,7 @@
 #include "WM_api.h"
 #include "WM_types.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /*************************** RNA Utilities ******************************/
 

source/blender/editors/interface/interface_widgets.cc

@@ -5,9 +5,9 @@
  * \ingroup edinterface
  */
 
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
+#include <climits>
+#include <cstdlib>
+#include <cstring>
 
 #include "DNA_brush_types.h"
 #include "DNA_screen_types.h"
@@ -32,7 +32,7 @@
 #include "UI_interface_icons.h"
 #include "UI_view2d.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "GPU_batch.h"
 #include "GPU_batch_presets.h"
@@ -55,7 +55,7 @@
 
 /* visual types for drawing */
 /* for time being separated from functional types */
-typedef enum {
+enum uiWidgetTypeEnum {
   /* default */
   UI_WTYPE_REGULAR,
 
@@ -105,12 +105,12 @@ typedef enum {
   UI_WTYPE_PROGRESSBAR,
   UI_WTYPE_NODESOCKET,
   UI_WTYPE_VIEW_ITEM,
-} uiWidgetTypeEnum;
+};
 
 /**
  * The button's state information adapted for drawing. Use #STATE_INFO_NULL for empty state.
  */
-typedef struct {
+struct uiWidgetStateInfo {
   /** Copy of #uiBut.flag (possibly with overrides for drawing). */
   int but_flag;
   /** Copy of #uiBut.drawflag (possibly with overrides for drawing). */
@@ -120,7 +120,7 @@ typedef struct {
   bool has_hold_action : 1;
   /** The button is in text input mode. */
   bool is_text_input : 1;
-} uiWidgetStateInfo;
+};
 
 static const uiWidgetStateInfo STATE_INFO_NULL = {0};
 
@@ -212,22 +212,21 @@ static void color_mul_hsl_v3(uchar ch[3], float h_factor, float s_factor, float
 /* fill this struct with polygon info to draw AA'ed */
 /* it has outline, back, and two optional tria meshes */
 
-typedef struct uiWidgetTrias {
+struct uiWidgetTrias {
   uint tot;
   int type;
   float size, center[2];
 
   float vec[16][2];
   const uint (*index)[3];
-
-} uiWidgetTrias;
+};
 
 /* max as used by round_box__edges */
 /* Make sure to change widget_base_vert.glsl accordingly. */
 #define WIDGET_CURVE_RESOLU 9
 #define WIDGET_SIZE_MAX (WIDGET_CURVE_RESOLU * 4)
 
-typedef struct uiWidgetBase {
+struct uiWidgetBase {
   /* TODO: remove these completely. */
   int totvert, halfwayvert;
   float outer_v[WIDGET_SIZE_MAX][2];
@@ -241,13 +240,13 @@ typedef struct uiWidgetBase {
 
   /* Widget shader parameters, must match the shader layout. */
   uiWidgetBaseParameters uniform_params;
-} uiWidgetBase;
+};
 
 /**
  * For time being only for visual appearance,
  * later, a handling callback can be added too.
  */
-typedef struct uiWidgetType {
+struct uiWidgetType {
 
   /* pointer to theme color definition */
   const uiWidgetColors *wcol_theme;
@@ -272,8 +271,7 @@ typedef struct uiWidgetType {
   void (*draw_block)(
       uiWidgetColors *, rcti *, int block_flag, int roundboxalign, const float zoom);
   void (*text)(const uiFontStyle *, const uiWidgetColors *, uiBut *, rcti *);
-
-} uiWidgetType;
+};
 
 /** \} */
 
@@ -424,7 +422,7 @@ static GPUVertFormat *vflag_format(void)
 
 static void set_roundbox_vertex_data(GPUVertBufRaw *vflag_step, uint32_t d)
 {
-  uint32_t *data = GPU_vertbuf_raw_step(vflag_step);
+  uint32_t *data = static_cast<uint32_t *>(GPU_vertbuf_raw_step(vflag_step));
   *data = d;
 }
 
@@ -436,7 +434,7 @@ static uint32_t set_roundbox_vertex(GPUVertBufRaw *vflag_step,
                                     bool emboss,
                                     int color)
 {
-  uint32_t *data = GPU_vertbuf_raw_step(vflag_step);
+  uint32_t *data = static_cast<uint32_t *>(GPU_vertbuf_raw_step(vflag_step));
   *data = corner_id;
   *data |= corner_v << 2;
   *data |= jit_v << 6;
@@ -448,7 +446,7 @@ static uint32_t set_roundbox_vertex(GPUVertBufRaw *vflag_step,
 
 GPUBatch *ui_batch_roundbox_widget_get(void)
 {
-  if (g_ui_batch_cache.roundbox_widget == NULL) {
+  if (g_ui_batch_cache.roundbox_widget == nullptr) {
     GPUVertBuf *vbo = GPU_vertbuf_create_with_format(vflag_format());
 
     GPU_vertbuf_data_alloc(vbo, 12);
@@ -474,7 +472,7 @@ GPUBatch *ui_batch_roundbox_widget_get(void)
 
 GPUBatch *ui_batch_roundbox_shadow_get(void)
 {
-  if (g_ui_batch_cache.roundbox_shadow == NULL) {
+  if (g_ui_batch_cache.roundbox_shadow == nullptr) {
     uint32_t last_data;
     GPUVertBufRaw vflag_step;
     GPUVertBuf *vbo = GPU_vertbuf_create_with_format(vflag_format());
@@ -502,7 +500,7 @@ GPUBatch *ui_batch_roundbox_shadow_get(void)
       }
     }
     g_ui_batch_cache.roundbox_shadow = GPU_batch_create_ex(
-        GPU_PRIM_TRI_STRIP, vbo, NULL, GPU_BATCH_OWNS_VBO);
+        GPU_PRIM_TRI_STRIP, vbo, nullptr, GPU_BATCH_OWNS_VBO);
     gpu_batch_presets_register(g_ui_batch_cache.roundbox_shadow);
   }
   return g_ui_batch_cache.roundbox_shadow;
@@ -971,7 +969,7 @@ static void shape_preset_init_scroll_circle(uiWidgetTrias *tria,
 
 static void widget_draw_vertex_buffer(uint pos,
                                       uint col,
-                                      int mode,
+                                      GPUPrimType mode,
                                       const float quads_pos[WIDGET_SIZE_MAX][2],
                                       const uchar quads_col[WIDGET_SIZE_MAX][4],
                                       uint totvert)
@@ -1073,7 +1071,7 @@ static void widgetbase_outline(uiWidgetBase *wtb, uint pos)
   widget_verts_to_triangle_strip(wtb, wtb->totvert, triangle_strip);
 
   widget_draw_vertex_buffer(
-      pos, 0, GPU_PRIM_TRI_STRIP, triangle_strip, NULL, wtb->totvert * 2 + 2);
+      pos, 0, GPU_PRIM_TRI_STRIP, triangle_strip, nullptr, wtb->totvert * 2 + 2);
 }
 
 static void widgetbase_set_uniform_alpha_discard(uiWidgetBase *wtb,
@@ -1502,7 +1500,8 @@ static void ui_text_clip_right_ex(const uiFontStyle *fstyle,
   BLI_assert(str[0]);
 
   /* How many BYTES (not characters) of this utf-8 string can fit, along with appended ellipsis. */
-  int l_end = BLF_width_to_strlen(fstyle->uifont_id, str, max_len, okwidth - sep_strwidth, NULL);
+  int l_end = BLF_width_to_strlen(
+      fstyle->uifont_id, str, max_len, okwidth - sep_strwidth, nullptr);
 
   if (l_end > 0) {
     /* At least one character, so clip and add the ellipsis. */
@@ -1513,7 +1512,7 @@ static void ui_text_clip_right_ex(const uiFontStyle *fstyle,
   }
   else {
     /* Otherwise fit as much as we can without adding an ellipsis. */
-    l_end = BLF_width_to_strlen(fstyle->uifont_id, str, max_len, okwidth, NULL);
+    l_end = BLF_width_to_strlen(fstyle->uifont_id, str, max_len, okwidth, nullptr);
     str[l_end] = '\0';
     if (r_final_len) {
       *r_final_len = (size_t)l_end;
@@ -1541,7 +1540,7 @@ float UI_text_clip_middle_ex(const uiFontStyle *fstyle,
     const int sep_len = sizeof(sep) - 1;
     const float sep_strwidth = BLF_width(fstyle->uifont_id, sep, sep_len + 1);
 
-    char *rpart = NULL, rpart_buf[UI_MAX_DRAW_STR];
+    char *rpart = nullptr, rpart_buf[UI_MAX_DRAW_STR];
     float rpart_width = 0.0f;
     size_t rpart_len = 0;
     size_t final_lpart_len;
@@ -1559,7 +1558,7 @@ float UI_text_clip_middle_ex(const uiFontStyle *fstyle,
           /* Not enough place for actual label, just display protected right part.
            * Here just for safety, should never happen in real life! */
           memmove(str, rpart, rpart_len + 1);
-          rpart = NULL;
+          rpart = nullptr;
           okwidth += rpart_width;
           strwidth = rpart_width;
         }
@@ -1575,7 +1574,7 @@ float UI_text_clip_middle_ex(const uiFontStyle *fstyle,
     }
 
     const size_t l_end = BLF_width_to_strlen(
-        fstyle->uifont_id, str, max_len, parts_strwidth, NULL);
+        fstyle->uifont_id, str, max_len, parts_strwidth, nullptr);
     if (l_end < 10 || min_ff(parts_strwidth, strwidth - okwidth) < minwidth) {
       /* If we really have no place, or we would clip a very small piece of string in the middle,
        * only show start of string.
@@ -1586,7 +1585,7 @@ float UI_text_clip_middle_ex(const uiFontStyle *fstyle,
     else {
       size_t r_offset, r_len;
 
-      r_offset = BLF_width_to_rstrlen(fstyle->uifont_id, str, max_len, parts_strwidth, NULL);
+      r_offset = BLF_width_to_rstrlen(fstyle->uifont_id, str, max_len, parts_strwidth, nullptr);
       r_len = strlen(str + r_offset) + 1; /* +1 for the trailing '\0'. */
 
       if (l_end + sep_len + r_len + rpart_len > max_len) {
@@ -1869,7 +1868,7 @@ static void widget_draw_text(const uiFontStyle *fstyle,
 {
   int drawstr_left_len = UI_MAX_DRAW_STR;
   const char *drawstr = but->drawstr;
-  const char *drawstr_right = NULL;
+  const char *drawstr_right = nullptr;
   bool use_right_only = false;
 
 #ifdef WITH_INPUT_IME
@@ -1901,7 +1900,7 @@ static void widget_draw_text(const uiFontStyle *fstyle,
   else {
     if (but->editstr) {
       /* max length isn't used in this case,
-       * we rely on string being NULL terminated. */
+       * we rely on string being nullptr terminated. */
       drawstr_left_len = INT_MAX;
 
 #ifdef WITH_INPUT_IME
@@ -2058,7 +2057,7 @@ static void widget_draw_text(const uiFontStyle *fstyle,
   bool use_drawstr_right_as_hint = false;
 
   /* cut string in 2 parts - only for menu entries */
-  if (but->flag & UI_BUT_HAS_SEP_CHAR && (but->editstr == NULL)) {
+  if (but->flag & UI_BUT_HAS_SEP_CHAR && (but->editstr == nullptr)) {
     drawstr_right = strrchr(drawstr, UI_SEP_CHAR);
     if (drawstr_right) {
       use_drawstr_right_as_hint = true;
@@ -2071,7 +2070,7 @@ static void widget_draw_text(const uiFontStyle *fstyle,
   if (!drawstr_right && (but->drawflag & UI_BUT_TEXT_LEFT) &&
       ELEM(but->type, UI_BTYPE_NUM, UI_BTYPE_NUM_SLIDER) &&
       /* if we're editing or multi-drag (fake editing), then use left alignment */
-      (but->editstr == NULL) && (drawstr == but->drawstr)) {
+      (but->editstr == nullptr) && (drawstr == but->drawstr)) {
     drawstr_right = strrchr(drawstr + but->ofs, ':');
     if (drawstr_right) {
       drawstr_right++;
@@ -2097,17 +2096,17 @@ static void widget_draw_text(const uiFontStyle *fstyle,
                                                   (drawstr_left_len - but->ofs);
 
     if (drawlen > 0) {
+      uiFontStyleDraw_Params params{};
+      params.align = align;
       UI_fontstyle_draw_ex(fstyle,
                            rect,
                            drawstr + but->ofs,
                            drawlen,
                            wcol->text,
-                           &(struct uiFontStyleDraw_Params){
-                               .align = align,
-                           },
+                           &params,
                            &font_xofs,
                            &font_yofs,
-                           NULL);
+                           nullptr);
 
       if (but->menu_key != '\0') {
         const char *drawstr_ofs = drawstr + but->ofs;
@@ -2116,10 +2115,10 @@ static void widget_draw_text(const uiFontStyle *fstyle,
         {
           /* Find upper case, fallback to lower case. */
           const char *drawstr_end = drawstr_ofs + drawlen;
-          const char keys[] = {but->menu_key - 32, but->menu_key};
+          const char keys[] = {char(but->menu_key - 32), but->menu_key};
           for (int i = 0; i < ARRAY_SIZE(keys); i++) {
             const char *drawstr_menu = strchr(drawstr_ofs, keys[i]);
-            if (drawstr_menu != NULL && drawstr_menu < drawstr_end) {
+            if (drawstr_menu != nullptr && drawstr_menu < drawstr_end) {
               ul_index = (int)(drawstr_menu - drawstr_ofs);
               break;
             }
@@ -2153,14 +2152,9 @@ static void widget_draw_text(const uiFontStyle *fstyle,
     }
 
     rect->xmax -= UI_TEXT_CLIP_MARGIN;
-    UI_fontstyle_draw(fstyle,
-                      rect,
-                      drawstr_right,
-                      UI_MAX_DRAW_STR,
-                      col,
-                      &(struct uiFontStyleDraw_Params){
-                          .align = UI_STYLE_TEXT_RIGHT,
-                      });
+    uiFontStyleDraw_Params params{};
+    params.align = UI_STYLE_TEXT_RIGHT;
+    UI_fontstyle_draw(fstyle, rect, drawstr_right, UI_MAX_DRAW_STR, col, &params);
   }
 }
 
@@ -2219,7 +2213,7 @@ static void widget_draw_node_link_socket(const uiWidgetColors *wcol,
     UI_widgetbase_draw_cache_flush();
     GPU_blend(GPU_BLEND_NONE);
 
-    ED_node_socket_draw(but->custom_data, rect, col, scale);
+    ED_node_socket_draw(static_cast<bNodeSocket *>(but->custom_data), rect, col, scale);
   }
   else {
     widget_draw_icon(but, ICON_LAYER_USED, alpha, rect, wcol->text);
@@ -2263,7 +2257,7 @@ static void widget_draw_text_icon(const uiFontStyle *fstyle,
 
   /* Big previews with optional text label below */
   if (but->flag & UI_BUT_ICON_PREVIEW && ui_block_is_menu(but->block)) {
-    const BIFIconID icon = ui_but_icon(but);
+    const BIFIconID icon = BIFIconID(ui_but_icon(but));
     int icon_size = BLI_rcti_size_y(rect);
     int text_size = 0;
 
@@ -2300,7 +2294,7 @@ static void widget_draw_text_icon(const uiFontStyle *fstyle,
     }
 #endif
 
-    const BIFIconID icon = ui_but_icon(but);
+    const BIFIconID icon = BIFIconID(ui_but_icon(but));
     const int icon_size_init = is_tool ? ICON_DEFAULT_HEIGHT_TOOLBAR : ICON_DEFAULT_HEIGHT;
     const float icon_size = icon_size_init / (but->block->aspect * U.inv_dpi_fac);
     const float icon_padding = 2 * UI_DPI_FAC;
@@ -2350,7 +2344,7 @@ static void widget_draw_text_icon(const uiFontStyle *fstyle,
       rect->xmin += text_padding;
     }
     else if (but->flag & UI_BUT_DRAG_MULTI) {
-      const bool text_is_edited = ui_but_drag_multi_edit_get(but) != NULL;
+      const bool text_is_edited = ui_but_drag_multi_edit_get(but) != nullptr;
       if (text_is_edited || (but->drawflag & UI_BUT_TEXT_LEFT)) {
         rect->xmin += text_padding;
       }
@@ -2456,7 +2450,7 @@ static const uchar *widget_color_blend_from_flags(const uiWidgetStateColors *wco
 {
   /* Explicitly require #UI_EMBOSS_NONE_OR_STATUS for color blending with no emboss. */
   if (emboss == UI_EMBOSS_NONE) {
-    return NULL;
+    return nullptr;
   }
 
   if (state->but_drawflag & UI_BUT_ANIMATED_CHANGED) {
@@ -2474,7 +2468,7 @@ static const uchar *widget_color_blend_from_flags(const uiWidgetStateColors *wco
   if (state->but_flag & UI_BUT_OVERRIDDEN) {
     return wcol_state->inner_overridden_sel;
   }
-  return NULL;
+  return nullptr;
 }
 
 /* copy colors from theme, and set changes in it based on state */
@@ -2498,7 +2492,7 @@ static void widget_state(uiWidgetType *wt, const uiWidgetStateInfo *state, eUIEm
 
   if (state->but_flag & UI_SELECT) {
     copy_v4_v4_uchar(wt->wcol.inner, wt->wcol.inner_sel);
-    if (color_blend != NULL) {
+    if (color_blend != nullptr) {
       color_blend_v3_v3(wt->wcol.inner, color_blend, wcol_state->blend);
     }
 
@@ -2513,7 +2507,7 @@ static void widget_state(uiWidgetType *wt, const uiWidgetStateInfo *state, eUIEm
       copy_v4_v4_uchar(wt->wcol.inner, wt->wcol.inner_sel);
       copy_v4_v4_uchar(wt->wcol.text, wt->wcol.text_sel);
     }
-    if (color_blend != NULL) {
+    if (color_blend != nullptr) {
       color_blend_v3_v3(wt->wcol.inner, color_blend, wcol_state->blend);
     }
 
@@ -2587,7 +2581,7 @@ static void widget_state_numslider(uiWidgetType *wt,
   widget_state(wt, state, emboss);
 
   const uchar *color_blend = widget_color_blend_from_flags(wcol_state, state, emboss);
-  if (color_blend != NULL) {
+  if (color_blend != nullptr) {
     /* Set the slider 'item' so that it reflects state settings too.
      * De-saturate so the color of the slider doesn't conflict with the blend color,
      * which can make the color hard to see when the slider is set to full (see T66102). */
@@ -2622,16 +2616,16 @@ static void widget_state_option_menu(uiWidgetType *wt,
 }
 
 static void widget_state_nothing(uiWidgetType *wt,
-                                 const uiWidgetStateInfo *UNUSED(state),
-                                 eUIEmbossType UNUSED(emboss))
+                                 const uiWidgetStateInfo * /*state*/,
+                                 eUIEmbossType /*emboss*/)
 {
   wt->wcol = *(wt->wcol_theme);
 }
 
 /* special case, button that calls pulldown */
 static void widget_state_pulldown(uiWidgetType *wt,
-                                  const uiWidgetStateInfo *UNUSED(state),
-                                  eUIEmbossType UNUSED(emboss))
+                                  const uiWidgetStateInfo * /*state*/,
+                                  eUIEmbossType /*emboss*/)
 {
   wt->wcol = *(wt->wcol_theme);
 }
@@ -2639,7 +2633,7 @@ static void widget_state_pulldown(uiWidgetType *wt,
 /* special case, pie menu items */
 static void widget_state_pie_menu_item(uiWidgetType *wt,
                                        const uiWidgetStateInfo *state,
-                                       eUIEmbossType UNUSED(emboss))
+                                       eUIEmbossType /*emboss*/)
 {
   wt->wcol = *(wt->wcol_theme);
 
@@ -2673,7 +2667,7 @@ static void widget_state_pie_menu_item(uiWidgetType *wt,
 /* special case, menu items */
 static void widget_state_menu_item(uiWidgetType *wt,
                                    const uiWidgetStateInfo *state,
-                                   eUIEmbossType UNUSED(emboss))
+                                   eUIEmbossType /*emboss*/)
 {
   wt->wcol = *(wt->wcol_theme);
 
@@ -2754,7 +2748,7 @@ static void widget_softshadow(const rcti *rect, int roundboxalign, const float r
 
     widget_verts_to_triangle_strip(&wtb, totvert, triangle_strip);
 
-    widget_draw_vertex_buffer(pos, 0, GPU_PRIM_TRI_STRIP, triangle_strip, NULL, totvert * 2);
+    widget_draw_vertex_buffer(pos, 0, GPU_PRIM_TRI_STRIP, triangle_strip, nullptr, totvert * 2);
   }
 
   immUnbindProgram();
@@ -2861,7 +2855,7 @@ static void ui_draw_but_HSVCIRCLE(uiBut *but, const uiWidgetColors *wcol, const
   const float centy = BLI_rcti_cent_y_fl(rect);
   const float radius = (float)min_ii(BLI_rcti_size_x(rect), BLI_rcti_size_y(rect)) / 2.0f;
 
-  ColorPicker *cpicker = but->custom_data;
+  ColorPicker *cpicker = static_cast<ColorPicker *>(but->custom_data);
   float rgb[3], hsv[3], rgb_center[3];
   const bool is_color_gamma = ui_but_is_color_gamma(but);
 
@@ -3171,7 +3165,7 @@ static void ui_draw_but_HSVCUBE(uiBut *but, const rcti *rect)
   const uiButHSVCube *hsv_but = (uiButHSVCube *)but;
   float rgb[3];
   float x = 0.0f, y = 0.0f;
-  ColorPicker *cpicker = but->custom_data;
+  ColorPicker *cpicker = static_cast<ColorPicker *>(but->custom_data);
   float *hsv = cpicker->hsv_perceptual;
   float hsv_n[3];
 
@@ -3235,14 +3229,19 @@ static void ui_draw_but_HSV_v(uiBut *but, const rcti *rect)
   round_box_edges(&wtb, UI_CNR_ALL, rect, rad);
 
   /* setup temp colors */
-  widgetbase_draw(&wtb,
-                  &((uiWidgetColors){
-                      .outline = {0, 0, 0, 255},
-                      .inner = {128, 128, 128, 255},
-                      .shadetop = 127,
-                      .shadedown = -128,
-                      .shaded = 1,
-                  }));
+  uiWidgetColors colors{};
+  colors.outline[0] = 0;
+  colors.outline[1] = 0;
+  colors.outline[2] = 0;
+  colors.outline[3] = 255;
+  colors.inner[0] = 128;
+  colors.inner[1] = 128;
+  colors.inner[2] = 128;
+  colors.inner[3] = 255;
+  colors.shadetop = 127;
+  colors.shadedown = -128;
+  colors.shaded = 1;
+  widgetbase_draw(&wtb, &colors);
 
   /* We are drawing on top of widget bases. Flush cache. */
   GPU_blend(GPU_BLEND_ALPHA);
@@ -3411,7 +3410,7 @@ static void widget_numbut(uiWidgetColors *wcol,
 
 static void widget_menubut(uiWidgetColors *wcol,
                            rcti *rect,
-                           const uiWidgetStateInfo *UNUSED(state),
+                           const uiWidgetStateInfo * /*state*/,
                            int roundboxalign,
                            const float zoom)
 {
@@ -3435,11 +3434,11 @@ static void widget_menubut(uiWidgetColors *wcol,
 /**
  * Draw menu buttons still with triangles when field is not embossed
  */
-static void widget_menubut_embossn(const uiBut *UNUSED(but),
+static void widget_menubut_embossn(const uiBut * /*but*/,
                                    uiWidgetColors *wcol,
                                    rcti *rect,
-                                   const uiWidgetStateInfo *UNUSED(state),
-                                   int UNUSED(roundboxalign))
+                                   const uiWidgetStateInfo * /*state*/,
+                                   int /*roundboxalign*/)
 {
   uiWidgetBase wtb;
   widget_init(&wtb);
@@ -3457,7 +3456,7 @@ static void widget_menubut_embossn(const uiBut *UNUSED(but),
 /**
  * Draw number buttons still with triangles when field is not embossed
  */
-static void widget_numbut_embossn(const uiBut *UNUSED(but),
+static void widget_numbut_embossn(const uiBut * /*but*/,
                                   uiWidgetColors *wcol,
                                   rcti *rect,
                                   const uiWidgetStateInfo *state,
@@ -3548,8 +3547,8 @@ static void widget_scroll(uiBut *but,
                           uiWidgetColors *wcol,
                           rcti *rect,
                           const uiWidgetStateInfo *state,
-                          int UNUSED(roundboxalign),
-                          const float UNUSED(zoom))
+                          int /*roundboxalign*/,
+                          const float /*zoom*/)
 {
   /* calculate slider part */
   const float value = (float)ui_but_value_get(but);
@@ -3603,7 +3602,7 @@ static void widget_scroll(uiBut *but,
 static void widget_progressbar(uiBut *but,
                                uiWidgetColors *wcol,
                                rcti *rect,
-                               const uiWidgetStateInfo *UNUSED(state),
+                               const uiWidgetStateInfo * /*state*/,
                                int roundboxalign,
                                const float zoom)
 {
@@ -3638,7 +3637,7 @@ static void widget_progressbar(uiBut *but,
 static void widget_view_item(uiWidgetColors *wcol,
                              rcti *rect,
                              const uiWidgetStateInfo *state,
-                             int UNUSED(roundboxalign),
+                             int /*roundboxalign*/,
                              const float zoom)
 {
   uiWidgetBase wtb;
@@ -3657,9 +3656,9 @@ static void widget_view_item(uiWidgetColors *wcol,
 static void widget_nodesocket(uiBut *but,
                               uiWidgetColors *wcol,
                               rcti *rect,
-                              const uiWidgetStateInfo *UNUSED(state),
-                              int UNUSED(roundboxalign),
-                              const float UNUSED(zoom))
+                              const uiWidgetStateInfo * /*state*/,
+                              int /*roundboxalign*/,
+                              const float /*zoom*/)
 {
   const int radi = 0.25f * BLI_rcti_size_y(rect);
 
@@ -3902,8 +3901,8 @@ static void widget_swatch(uiBut *but,
 static void widget_unitvec(uiBut *but,
                            uiWidgetColors *wcol,
                            rcti *rect,
-                           const uiWidgetStateInfo *UNUSED(state),
-                           int UNUSED(roundboxalign),
+                           const uiWidgetStateInfo * /*state*/,
+                           int /*roundboxalign*/,
                            const float zoom)
 {
   const float rad = widget_radius_from_zoom(zoom, wcol);
@@ -3961,9 +3960,9 @@ static void widget_textbut(uiWidgetColors *wcol,
 static void widget_preview_tile(uiBut *but,
                                 uiWidgetColors *wcol,
                                 rcti *rect,
-                                const uiWidgetStateInfo *UNUSED(state),
-                                int UNUSED(roundboxalign),
-                                const float UNUSED(zoom))
+                                const uiWidgetStateInfo * /*state*/,
+                                int /*roundboxalign*/,
+                                const float /*zoom*/)
 {
   const uiStyle *style = UI_style_get();
   ui_draw_preview_item_stateless(
@@ -3972,7 +3971,7 @@ static void widget_preview_tile(uiBut *but,
 
 static void widget_menuiconbut(uiWidgetColors *wcol,
                                rcti *rect,
-                               const uiWidgetStateInfo *UNUSED(state),
+                               const uiWidgetStateInfo * /*state*/,
                                int roundboxalign,
                                const float zoom)
 {
@@ -4020,8 +4019,8 @@ static void widget_pulldownbut(uiWidgetColors *wcol,
 
 static void widget_menu_itembut(uiWidgetColors *wcol,
                                 rcti *rect,
-                                const uiWidgetStateInfo *UNUSED(state),
-                                int UNUSED(roundboxalign),
+                                const uiWidgetStateInfo * /*state*/,
+                                int /*roundboxalign*/,
                                 const float zoom)
 {
   uiWidgetBase wtb;
@@ -4044,8 +4043,8 @@ static void widget_menu_itembut(uiWidgetColors *wcol,
 
 static void widget_menu_itembut_unpadded(uiWidgetColors *wcol,
                                          rcti *rect,
-                                         const uiWidgetStateInfo *UNUSED(state),
-                                         int UNUSED(roundboxalign),
+                                         const uiWidgetStateInfo * /*state*/,
+                                         int /*roundboxalign*/,
                                          const float zoom)
 {
   /* This function is used for menu items placed close to each other horizontally, e.g. the matcap
@@ -4066,8 +4065,8 @@ static void widget_menu_itembut_unpadded(uiWidgetColors *wcol,
 static void widget_menu_radial_itembut(uiBut *but,
                                        uiWidgetColors *wcol,
                                        rcti *rect,
-                                       const uiWidgetStateInfo *UNUSED(state),
-                                       int UNUSED(roundboxalign),
+                                       const uiWidgetStateInfo * /*state*/,
+                                       int /*roundboxalign*/,
                                        const float zoom)
 {
   const float fac = but->block->pie_data.alphafac;
@@ -4092,8 +4091,8 @@ static void widget_menu_radial_itembut(uiBut *but,
 
 static void widget_list_itembut(uiWidgetColors *wcol,
                                 rcti *rect,
-                                const uiWidgetStateInfo *UNUSED(state),
-                                int UNUSED(roundboxalign),
+                                const uiWidgetStateInfo * /*state*/,
+                                int /*roundboxalign*/,
                                 const float zoom)
 {
   uiWidgetBase wtb;
@@ -4110,8 +4109,8 @@ static void widget_list_itembut(uiWidgetColors *wcol,
 static void widget_optionbut(uiWidgetColors *wcol,
                              rcti *rect,
                              const uiWidgetStateInfo *state,
-                             int UNUSED(roundboxalign),
-                             const float UNUSED(zoom))
+                             int /*roundboxalign*/,
+                             const float /*zoom*/)
 {
   /* For a right aligned layout (signified by #UI_BUT_TEXT_RIGHT), draw the text on the left of the
    * checkbox. */
@@ -4187,7 +4186,7 @@ static void widget_state_label(uiWidgetType *wt,
 
 static void widget_radiobut(uiWidgetColors *wcol,
                             rcti *rect,
-                            const uiWidgetStateInfo *UNUSED(state),
+                            const uiWidgetStateInfo * /*state*/,
                             int roundboxalign,
                             const float zoom)
 {
@@ -4203,7 +4202,7 @@ static void widget_radiobut(uiWidgetColors *wcol,
 static void widget_box(uiBut *but,
                        uiWidgetColors *wcol,
                        rcti *rect,
-                       const uiWidgetStateInfo *UNUSED(state),
+                       const uiWidgetStateInfo * /*state*/,
                        int roundboxalign,
                        const float zoom)
 {
@@ -4214,7 +4213,7 @@ static void widget_box(uiBut *but,
   copy_v3_v3_uchar(old_col, wcol->inner);
 
   /* abuse but->hsv - if it's non-zero, use this color as the box's background */
-  if (but != NULL && but->col[3]) {
+  if (but != nullptr && but->col[3]) {
     wcol->inner[0] = but->col[0];
     wcol->inner[1] = but->col[1];
     wcol->inner[2] = but->col[2];
@@ -4231,7 +4230,7 @@ static void widget_box(uiBut *but,
 
 static void widget_but(uiWidgetColors *wcol,
                        rcti *rect,
-                       const uiWidgetStateInfo *UNUSED(state),
+                       const uiWidgetStateInfo * /*state*/,
                        int roundboxalign,
                        const float zoom)
 {
@@ -4245,7 +4244,7 @@ static void widget_but(uiWidgetColors *wcol,
 }
 
 #if 0
-static void widget_roundbut(uiWidgetColors *wcol, rcti *rect, int UNUSED(state), int roundboxalign)
+static void widget_roundbut(uiWidgetColors *wcol, rcti *rect, int /*state*/ int roundboxalign)
 {
   uiWidgetBase wtb;
   const float rad = wcol->roundness * U.widget_unit;
@@ -4382,7 +4381,7 @@ static uiWidgetType *widget_type(uiWidgetTypeEnum type)
   wt.wcol_state = &btheme->tui.wcol_state;
   wt.state = widget_state;
   wt.draw = widget_but;
-  wt.custom = NULL;
+  wt.custom = nullptr;
   wt.text = widget_draw_text_icon;
 
   switch (type) {
@@ -4390,7 +4389,7 @@ static uiWidgetType *widget_type(uiWidgetTypeEnum type)
       break;
 
     case UI_WTYPE_LABEL:
-      wt.draw = NULL;
+      wt.draw = nullptr;
       wt.state = widget_state_label;
       break;
 
@@ -4507,9 +4506,9 @@ static uiWidgetType *widget_type(uiWidgetTypeEnum type)
       break;
 
     case UI_WTYPE_PREVIEW_TILE:
-      wt.draw = NULL;
+      wt.draw = nullptr;
       /* Drawn via the `custom` callback. */
-      wt.text = NULL;
+      wt.text = nullptr;
       wt.custom = widget_preview_tile;
       break;
 
@@ -4637,12 +4636,12 @@ static int widget_roundbox_set(uiBut *but, rcti *rect)
 /** \name Public API
  * \{ */
 
-void ui_draw_but(const bContext *C, struct ARegion *region, uiStyle *style, uiBut *but, rcti *rect)
+void ui_draw_but(const bContext *C, ARegion *region, uiStyle *style, uiBut *but, rcti *rect)
 {
   bTheme *btheme = UI_GetTheme();
   const ThemeUI *tui = &btheme->tui;
   const uiFontStyle *fstyle = &style->widget;
-  uiWidgetType *wt = NULL;
+  uiWidgetType *wt = nullptr;
 
   /* handle menus separately */
   if (but->emboss == UI_EMBOSS_PULLDOWN) {
@@ -4908,7 +4907,7 @@ void ui_draw_but(const bContext *C, struct ARegion *region, uiStyle *style, uiBu
     }
   }
 
-  if (wt == NULL) {
+  if (wt == nullptr) {
     return;
   }
 
@@ -4996,7 +4995,7 @@ static void ui_draw_clip_tri(uiBlock *block, rcti *rect, uiWidgetType *wt)
   }
 }
 
-void ui_draw_menu_back(uiStyle *UNUSED(style), uiBlock *block, rcti *rect)
+void ui_draw_menu_back(uiStyle * /*style*/, uiBlock *block, rcti *rect)
 {
   uiWidgetType *wt = widget_type(UI_WTYPE_MENU_BACK);
 
@@ -5086,15 +5085,12 @@ static void ui_draw_popover_back_impl(const uiWidgetColors *wcol,
   GPU_blend(GPU_BLEND_NONE);
 }
 
-void ui_draw_popover_back(struct ARegion *region,
-                          uiStyle *UNUSED(style),
-                          uiBlock *block,
-                          rcti *rect)
+void ui_draw_popover_back(ARegion *region, uiStyle * /*style*/, uiBlock *block, rcti *rect)
 {
   uiWidgetType *wt = widget_type(UI_WTYPE_MENU_BACK);
 
   if (block) {
-    float mval_origin[2] = {UNPACK2(block->bounds_offset)};
+    float mval_origin[2] = {float(block->bounds_offset[0]), float(block->bounds_offset[1])};
     ui_window_to_block_fl(region, block, &mval_origin[0], &mval_origin[1]);
     ui_draw_popover_back_impl(
         wt->wcol_theme, rect, block->direction, U.widget_unit / block->aspect, mval_origin);
@@ -5203,7 +5199,7 @@ void ui_draw_pie_center(uiBlock *block)
                      pie_radius_external,
                      subd,
                      btheme->tui.wcol_pie_menu.inner,
-                     NULL,
+                     nullptr,
                      false);
   }
 
@@ -5231,7 +5227,7 @@ void ui_draw_pie_center(uiBlock *block)
                        pie_radius_external,
                        subd,
                        btheme->tui.wcol_pie_menu.inner_sel,
-                       NULL,
+                       nullptr,
                        false);
     }
   }
@@ -5259,7 +5255,7 @@ void ui_draw_pie_center(uiBlock *block)
                      pie_confirm_external,
                      subd,
                      col,
-                     NULL,
+                     nullptr,
                      false);
   }
 
@@ -5312,10 +5308,10 @@ void ui_draw_widget_menu_back_color(const rcti *rect, bool use_shadow, const flo
 
 void ui_draw_widget_menu_back(const rcti *rect, bool use_shadow)
 {
-  ui_draw_widget_back_color(UI_WTYPE_MENU_BACK, use_shadow, rect, NULL);
+  ui_draw_widget_back_color(UI_WTYPE_MENU_BACK, use_shadow, rect, nullptr);
 }
 
-void ui_draw_tooltip_background(const uiStyle *UNUSED(style), uiBlock *UNUSED(block), rcti *rect)
+void ui_draw_tooltip_background(const uiStyle * /*style*/, uiBlock * /*block*/, rcti *rect)
 {
   uiWidgetType *wt = widget_type(UI_WTYPE_TOOLTIP);
   wt->state(wt, &STATE_INFO_NULL, UI_EMBOSS_UNDEFINED);
@@ -5336,7 +5332,7 @@ void ui_draw_menu_item(const uiFontStyle *fstyle,
   const int row_height = BLI_rcti_size_y(rect);
   int max_hint_width = INT_MAX;
   int padding = 0.25f * row_height;
-  char *cpoin = NULL;
+  char *cpoin = nullptr;
 
   uiWidgetStateInfo state = {0};
   state.but_flag = but_flag;
@@ -5354,7 +5350,7 @@ void ui_draw_menu_item(const uiFontStyle *fstyle,
 
   /* cut string in 2 parts? */
   if (separator_type != UI_MENU_ITEM_SEPARATOR_NONE) {
-    cpoin = strrchr(name, UI_SEP_CHAR);
+    cpoin = const_cast<char *>(strrchr(name, UI_SEP_CHAR));
     if (cpoin) {
       *cpoin = 0;
 
@@ -5400,19 +5396,12 @@ void ui_draw_menu_item(const uiFontStyle *fstyle,
     }
 
     int xofs = 0, yofs = 0;
-    struct ResultBLF info;
-    UI_fontstyle_draw_ex(fstyle,
-                         rect,
-                         drawstr,
-                         sizeof(drawstr),
-                         wt->wcol.text,
-                         &(struct uiFontStyleDraw_Params){
-                             .align = UI_STYLE_TEXT_LEFT,
-                         },
-                         &xofs,
-                         &yofs,
-                         &info);
-    if (r_xmax != NULL) {
+    ResultBLF info;
+    uiFontStyleDraw_Params params{};
+    params.align = UI_STYLE_TEXT_LEFT;
+    UI_fontstyle_draw_ex(
+        fstyle, rect, drawstr, sizeof(drawstr), wt->wcol.text, &params, &xofs, &yofs, &info);
+    if (r_xmax != nullptr) {
       *r_xmax = xofs + info.width;
     }
   }
@@ -5457,14 +5446,9 @@ void ui_draw_menu_item(const uiFontStyle *fstyle,
       }
 
       rect->xmax = _rect.xmax - 5;
-      UI_fontstyle_draw(fstyle,
-                        rect,
-                        hint_drawstr,
-                        sizeof(hint_drawstr),
-                        wt->wcol.text,
-                        &(struct uiFontStyleDraw_Params){
-                            .align = UI_STYLE_TEXT_RIGHT,
-                        });
+      uiFontStyleDraw_Params params{};
+      params.align = UI_STYLE_TEXT_RIGHT;
+      UI_fontstyle_draw(fstyle, rect, hint_drawstr, sizeof(hint_drawstr), wt->wcol.text, &params);
       *cpoin = UI_SEP_CHAR;
     }
   }
@@ -5487,7 +5471,7 @@ void ui_draw_preview_item_stateless(const uiFontStyle *fstyle,
     rect->ymin += text_size;
   }
   GPU_blend(GPU_BLEND_ALPHA);
-  widget_draw_preview(iconid, 1.0f, rect);
+  widget_draw_preview(BIFIconID(iconid), 1.0f, rect);
   GPU_blend(GPU_BLEND_NONE);
 
   if (!has_text) {
@@ -5513,14 +5497,9 @@ void ui_draw_preview_item_stateless(const uiFontStyle *fstyle,
     BLI_strncpy(drawstr, name, sizeof(drawstr));
     UI_text_clip_middle_ex(fstyle, drawstr, okwidth, minwidth, max_len, '\0');
 
-    UI_fontstyle_draw(fstyle,
-                      &trect,
-                      drawstr,
-                      sizeof(drawstr),
-                      text_col,
-                      &(struct uiFontStyleDraw_Params){
-                          .align = text_align,
-                      });
+    uiFontStyleDraw_Params params{};
+    params.align = text_align;
+    UI_fontstyle_draw(fstyle, &trect, drawstr, sizeof(drawstr), text_col, &params);
   }
 }
 

source/blender/editors/interface/resources.cc

@@ -5,9 +5,9 @@
  * \ingroup edinterface
  */
 
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
+#include <cmath>
+#include <cstdlib>
+#include <cstring>
 
 #include "MEM_guardedalloc.h"
 
@@ -34,24 +34,21 @@
 #include "UI_interface_icons.h"
 
 #include "GPU_framebuffer.h"
-#include "interface_intern.h"
-
-/* global for themes */
-typedef void (*VectorDrawFunc)(int x, int y, int w, int h, float alpha);
+#include "interface_intern.hh"
 
 /* be sure to keep 'bThemeState' in sync */
-static struct bThemeState g_theme_state = {
-    NULL,
+static bThemeState g_theme_state = {
+    nullptr,
     SPACE_VIEW3D,
     RGN_TYPE_WINDOW,
 };
 
-void ui_resources_init(void)
+void ui_resources_init()
 {
   UI_icons_init();
 }
 
-void ui_resources_free(void)
+void ui_resources_free()
 {
   UI_icons_free();
 }
@@ -62,7 +59,7 @@ void ui_resources_free(void)
 
 const uchar *UI_ThemeGetColorPtr(bTheme *btheme, int spacetype, int colorid)
 {
-  ThemeSpace *ts = NULL;
+  ThemeSpace *ts = nullptr;
   static uchar error[4] = {240, 0, 240, 255};
   static uchar alert[4] = {240, 60, 60, 255};
   static uchar header_active[4] = {0, 0, 0, 255};
@@ -230,7 +227,7 @@ const uchar *UI_ThemeGetColorPtr(bTheme *btheme, int spacetype, int colorid)
           cp = ts->header;
           break;
 
-        case TH_HEADER_ACTIVE:
+        case TH_HEADER_ACTIVE: {
           cp = ts->header;
           const int factor = 5;
           /* Lighten the header color when editor is active. */
@@ -240,7 +237,7 @@ const uchar *UI_ThemeGetColorPtr(bTheme *btheme, int spacetype, int colorid)
           header_active[3] = cp[3];
           cp = header_active;
           break;
-
+        }
         case TH_HEADER_TEXT:
           cp = ts->header_text;
           break;
@@ -1021,12 +1018,13 @@ const uchar *UI_ThemeGetColorPtr(bTheme *btheme, int spacetype, int colorid)
   return (const uchar *)cp;
 }
 
-void UI_theme_init_default(void)
+void UI_theme_init_default()
 {
   /* we search for the theme with name Default */
-  bTheme *btheme = BLI_findstring(&U.themes, "Default", offsetof(bTheme, name));
-  if (btheme == NULL) {
-    btheme = MEM_callocN(sizeof(bTheme), __func__);
+  bTheme *btheme = static_cast<bTheme *>(
+      BLI_findstring(&U.themes, "Default", offsetof(bTheme, name)));
+  if (btheme == nullptr) {
+    btheme = MEM_cnew<bTheme>(__func__);
     BLI_addtail(&U.themes, btheme);
   }
 
@@ -1037,7 +1035,7 @@ void UI_theme_init_default(void)
   btheme->active_theme_area = active_theme_area;
 }
 
-void UI_style_init_default(void)
+void UI_style_init_default()
 {
   BLI_freelistN(&U.uistyles);
   /* gets automatically re-allocated */
@@ -1048,34 +1046,34 @@ void UI_SetTheme(int spacetype, int regionid)
 {
   if (spacetype) {
     /* later on, a local theme can be found too */
-    g_theme_state.theme = U.themes.first;
+    g_theme_state.theme = static_cast<bTheme *>(U.themes.first);
     g_theme_state.spacetype = spacetype;
     g_theme_state.regionid = regionid;
   }
   else if (regionid) {
     /* popups */
-    g_theme_state.theme = U.themes.first;
+    g_theme_state.theme = static_cast<bTheme *>(U.themes.first);
     g_theme_state.spacetype = SPACE_PROPERTIES;
     g_theme_state.regionid = regionid;
   }
   else {
     /* for safety, when theme was deleted */
-    g_theme_state.theme = U.themes.first;
+    g_theme_state.theme = static_cast<bTheme *>(U.themes.first);
     g_theme_state.spacetype = SPACE_VIEW3D;
     g_theme_state.regionid = RGN_TYPE_WINDOW;
   }
 }
 
-bTheme *UI_GetTheme(void)
+bTheme *UI_GetTheme()
 {
-  return U.themes.first;
+  return static_cast<bTheme *>(U.themes.first);
 }
 
-void UI_Theme_Store(struct bThemeState *theme_state)
+void UI_Theme_Store(bThemeState *theme_state)
 {
   *theme_state = g_theme_state;
 }
-void UI_Theme_Restore(struct bThemeState *theme_state)
+void UI_Theme_Restore(bThemeState *theme_state)
 {
   g_theme_state = *theme_state;
 }
@@ -1084,13 +1082,13 @@ void UI_GetThemeColorShadeAlpha4ubv(int colorid, int coloffset, int alphaoffset,
 {
   int r, g, b, a;
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
-  r = coloffset + (int)cp[0];
+  r = coloffset + int(cp[0]);
   CLAMP(r, 0, 255);
-  g = coloffset + (int)cp[1];
+  g = coloffset + int(cp[1]);
   CLAMP(g, 0, 255);
-  b = coloffset + (int)cp[2];
+  b = coloffset + int(cp[2]);
   CLAMP(b, 0, 255);
-  a = alphaoffset + (int)cp[3];
+  a = alphaoffset + int(cp[3]);
   CLAMP(a, 0, 255);
 
   col[0] = r;
@@ -1143,51 +1141,51 @@ void UI_FontThemeColor(int fontid, int colorid)
 float UI_GetThemeValuef(int colorid)
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
-  return ((float)cp[0]);
+  return (float(cp[0]));
 }
 
 int UI_GetThemeValue(int colorid)
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
-  return ((int)cp[0]);
+  return (int(cp[0]));
 }
 
 float UI_GetThemeValueTypef(int colorid, int spacetype)
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, spacetype, colorid);
-  return ((float)cp[0]);
+  return (float(cp[0]));
 }
 
 int UI_GetThemeValueType(int colorid, int spacetype)
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, spacetype, colorid);
-  return ((int)cp[0]);
+  return (int(cp[0]));
 }
 
 void UI_GetThemeColor3fv(int colorid, float col[3])
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
-  col[0] = ((float)cp[0]) / 255.0f;
-  col[1] = ((float)cp[1]) / 255.0f;
-  col[2] = ((float)cp[2]) / 255.0f;
+  col[0] = (float(cp[0])) / 255.0f;
+  col[1] = (float(cp[1])) / 255.0f;
+  col[2] = (float(cp[2])) / 255.0f;
 }
 
 void UI_GetThemeColor4fv(int colorid, float col[4])
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
-  col[0] = ((float)cp[0]) / 255.0f;
-  col[1] = ((float)cp[1]) / 255.0f;
-  col[2] = ((float)cp[2]) / 255.0f;
-  col[3] = ((float)cp[3]) / 255.0f;
+  col[0] = (float(cp[0])) / 255.0f;
+  col[1] = (float(cp[1])) / 255.0f;
+  col[2] = (float(cp[2])) / 255.0f;
+  col[3] = (float(cp[3])) / 255.0f;
 }
 
 void UI_GetThemeColorType4fv(int colorid, int spacetype, float col[4])
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, spacetype, colorid);
-  col[0] = ((float)cp[0]) / 255.0f;
-  col[1] = ((float)cp[1]) / 255.0f;
-  col[2] = ((float)cp[2]) / 255.0f;
-  col[3] = ((float)cp[3]) / 255.0f;
+  col[0] = (float(cp[0])) / 255.0f;
+  col[1] = (float(cp[1])) / 255.0f;
+  col[2] = (float(cp[2])) / 255.0f;
+  col[3] = (float(cp[3])) / 255.0f;
 }
 
 void UI_GetThemeColorShade3fv(int colorid, int offset, float col[3])
@@ -1195,16 +1193,16 @@ void UI_GetThemeColorShade3fv(int colorid, int offset, float col[3])
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
   int r, g, b;
 
-  r = offset + (int)cp[0];
+  r = offset + int(cp[0]);
   CLAMP(r, 0, 255);
-  g = offset + (int)cp[1];
+  g = offset + int(cp[1]);
   CLAMP(g, 0, 255);
-  b = offset + (int)cp[2];
+  b = offset + int(cp[2]);
   CLAMP(b, 0, 255);
 
-  col[0] = ((float)r) / 255.0f;
-  col[1] = ((float)g) / 255.0f;
-  col[2] = ((float)b) / 255.0f;
+  col[0] = float(r) / 255.0f;
+  col[1] = float(g) / 255.0f;
+  col[2] = float(b) / 255.0f;
 }
 
 void UI_GetThemeColorShade3ubv(int colorid, int offset, uchar col[3])
@@ -1212,11 +1210,11 @@ void UI_GetThemeColorShade3ubv(int colorid, int offset, uchar col[3])
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
   int r, g, b;
 
-  r = offset + (int)cp[0];
+  r = offset + int(cp[0]);
   CLAMP(r, 0, 255);
-  g = offset + (int)cp[1];
+  g = offset + int(cp[1]);
   CLAMP(g, 0, 255);
-  b = offset + (int)cp[2];
+  b = offset + int(cp[2]);
   CLAMP(b, 0, 255);
 
   col[0] = r;
@@ -1245,11 +1243,11 @@ void UI_GetThemeColorShade4ubv(int colorid, int offset, uchar col[4])
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
   int r, g, b;
 
-  r = offset + (int)cp[0];
+  r = offset + int(cp[0]);
   CLAMP(r, 0, 255);
-  g = offset + (int)cp[1];
+  g = offset + int(cp[1]);
   CLAMP(g, 0, 255);
-  b = offset + (int)cp[2];
+  b = offset + int(cp[2]);
   CLAMP(b, 0, 255);
 
   col[0] = r;
@@ -1263,19 +1261,19 @@ void UI_GetThemeColorShadeAlpha4fv(int colorid, int coloffset, int alphaoffset,
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
   int r, g, b, a;
 
-  r = coloffset + (int)cp[0];
+  r = coloffset + int(cp[0]);
   CLAMP(r, 0, 255);
-  g = coloffset + (int)cp[1];
+  g = coloffset + int(cp[1]);
   CLAMP(g, 0, 255);
-  b = coloffset + (int)cp[2];
+  b = coloffset + int(cp[2]);
   CLAMP(b, 0, 255);
-  a = alphaoffset + (int)cp[3];
+  a = alphaoffset + int(cp[3]);
   CLAMP(a, 0, 255);
 
-  col[0] = ((float)r) / 255.0f;
-  col[1] = ((float)g) / 255.0f;
-  col[2] = ((float)b) / 255.0f;
-  col[3] = ((float)a) / 255.0f;
+  col[0] = float(r) / 255.0f;
+  col[1] = float(g) / 255.0f;
+  col[2] = float(b) / 255.0f;
+  col[3] = float(a) / 255.0f;
 }
 
 void UI_GetThemeColorBlendShade3fv(int colorid1, int colorid2, float fac, int offset, float col[3])
@@ -1293,9 +1291,9 @@ void UI_GetThemeColorBlendShade3fv(int colorid1, int colorid2, float fac, int of
   b = offset + floorf((1.0f - fac) * cp1[2] + fac * cp2[2]);
   CLAMP(b, 0, 255);
 
-  col[0] = ((float)r) / 255.0f;
-  col[1] = ((float)g) / 255.0f;
-  col[2] = ((float)b) / 255.0f;
+  col[0] = float(r) / 255.0f;
+  col[1] = float(g) / 255.0f;
+  col[2] = float(b) / 255.0f;
 }
 
 void UI_GetThemeColorBlendShade4fv(int colorid1, int colorid2, float fac, int offset, float col[4])
@@ -1316,10 +1314,10 @@ void UI_GetThemeColorBlendShade4fv(int colorid1, int colorid2, float fac, int of
   a = floorf((1.0f - fac) * cp1[3] + fac * cp2[3]); /* No shading offset. */
   CLAMP(a, 0, 255);
 
-  col[0] = ((float)r) / 255.0f;
-  col[1] = ((float)g) / 255.0f;
-  col[2] = ((float)b) / 255.0f;
-  col[3] = ((float)a) / 255.0f;
+  col[0] = float(r) / 255.0f;
+  col[1] = float(g) / 255.0f;
+  col[2] = float(b) / 255.0f;
+  col[3] = float(a) / 255.0f;
 }
 
 void UI_GetThemeColor3ubv(int colorid, uchar col[3])
@@ -1335,20 +1333,20 @@ void UI_GetThemeColorShade4fv(int colorid, int offset, float col[4])
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, g_theme_state.spacetype, colorid);
   int r, g, b, a;
 
-  r = offset + (int)cp[0];
+  r = offset + int(cp[0]);
   CLAMP(r, 0, 255);
-  g = offset + (int)cp[1];
+  g = offset + int(cp[1]);
   CLAMP(g, 0, 255);
-  b = offset + (int)cp[2];
+  b = offset + int(cp[2]);
   CLAMP(b, 0, 255);
 
-  a = (int)cp[3]; /* no shading offset... */
+  a = int(cp[3]); /* no shading offset... */
   CLAMP(a, 0, 255);
 
-  col[0] = ((float)r) / 255.0f;
-  col[1] = ((float)g) / 255.0f;
-  col[2] = ((float)b) / 255.0f;
-  col[3] = ((float)a) / 255.0f;
+  col[0] = float(r) / 255.0f;
+  col[1] = float(g) / 255.0f;
+  col[2] = float(b) / 255.0f;
+  col[3] = float(a) / 255.0f;
 }
 
 void UI_GetThemeColor4ubv(int colorid, uchar col[4])
@@ -1363,9 +1361,9 @@ void UI_GetThemeColor4ubv(int colorid, uchar col[4])
 void UI_GetThemeColorType3fv(int colorid, int spacetype, float col[3])
 {
   const uchar *cp = UI_ThemeGetColorPtr(g_theme_state.theme, spacetype, colorid);
-  col[0] = ((float)cp[0]) / 255.0f;
-  col[1] = ((float)cp[1]) / 255.0f;
-  col[2] = ((float)cp[2]) / 255.0f;
+  col[0] = (float(cp[0])) / 255.0f;
+  col[1] = (float(cp[1])) / 255.0f;
+  col[2] = (float(cp[2])) / 255.0f;
 }
 
 void UI_GetThemeColorType3ubv(int colorid, int spacetype, uchar col[3])
@@ -1418,9 +1416,9 @@ void UI_GetColorPtrShade3ubv(const uchar cp[3], uchar col[3], int offset)
 {
   int r, g, b;
 
-  r = offset + (int)cp[0];
-  g = offset + (int)cp[1];
-  b = offset + (int)cp[2];
+  r = offset + int(cp[0]);
+  g = offset + int(cp[1]);
+  b = offset + int(cp[2]);
 
   CLAMP(r, 0, 255);
   CLAMP(g, 0, 255);
@@ -1458,10 +1456,10 @@ void UI_ThemeClearColor(int colorid)
   GPU_clear_color(col[0], col[1], col[2], 1.0f);
 }
 
-int UI_ThemeMenuShadowWidth(void)
+int UI_ThemeMenuShadowWidth()
 {
   bTheme *btheme = UI_GetTheme();
-  return (int)(btheme->tui.menu_shadow_width * UI_DPI_FAC);
+  return int(btheme->tui.menu_shadow_width * UI_DPI_FAC);
 }
 
 void UI_make_axis_color(const uchar src_col[3], uchar dst_col[3], const char axis)

source/blender/editors/interface/view2d.cc

@@ -43,7 +43,7 @@
 #include "UI_interface.h"
 #include "UI_view2d.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 static void ui_view2d_curRect_validate_resize(View2D *v2d, bool resize);
 

source/blender/editors/interface/view2d_draw.cc

@@ -33,7 +33,7 @@
 #include "UI_interface.h"
 #include "UI_view2d.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 /* Compute display grid resolution
  ********************************************************/

source/blender/editors/interface/views/abstract_view.cc

@@ -4,7 +4,7 @@
  * \ingroup edinterface
  */
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "UI_abstract_view.hh"
 

source/blender/editors/interface/views/abstract_view_item.cc

@@ -12,7 +12,7 @@
 #include "WM_api.h"
 
 #include "UI_interface.h"
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "UI_abstract_view.hh"
 

source/blender/editors/interface/views/grid_view.cc

@@ -12,7 +12,7 @@
 #include "WM_types.h"
 
 #include "UI_interface.h"
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "UI_grid_view.hh"
 

source/blender/editors/interface/views/interface_view.cc

@@ -27,7 +27,7 @@
 
 #include "ED_screen.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "UI_interface.hh"
 

source/blender/editors/interface/views/tree_view.cc

@@ -11,7 +11,7 @@
 
 #include "BLT_translation.h"
 
-#include "interface_intern.h"
+#include "interface_intern.hh"
 
 #include "UI_interface.h"
 

source/blender/editors/space_buttons/buttons_texture.cc

@@ -51,7 +51,7 @@
 #include "WM_api.h"
 #include "WM_types.h"
 
-#include "../interface/interface_intern.h"
+#include "../interface/interface_intern.hh"
 
 #include "buttons_intern.h" /* own include */
 

source/blender/editors/space_node/node_draw.cc

@@ -77,6 +77,8 @@
 #include "FN_field.hh"
 #include "FN_field_cpp_type.hh"
 
+#include "../interface/interface_intern.hh" /* TODO: Remove */
+
 #include "node_intern.hh" /* own include */
 
 namespace geo_log = blender::nodes::geo_eval_log;
@@ -84,12 +86,6 @@ namespace geo_log = blender::nodes::geo_eval_log;
 using blender::GPointer;
 using blender::Vector;
 
-extern "C" {
-/* XXX interface.h */
-extern void ui_draw_dropshadow(
-    const rctf *rct, float radius, float aspect, float alpha, int select);
-}
-
 /**
  * This is passed to many functions which draw the node editor.
  */

source/blender/editors/space_node/node_templates.cc

@@ -32,7 +32,7 @@
 #include "NOD_socket.h"
 #include "NOD_socket_declarations.hh"
 
-#include "../interface/interface_intern.h" /* XXX bad level */
+#include "../interface/interface_intern.hh" /* XXX bad level */
 #include "UI_interface.h"
 
 #include "ED_node.h" /* own include */