Cleanup: GPU: Encapsulate glViewport calls

source/blender/draw/intern/draw_manager.c

@@ -1793,9 +1793,6 @@ void DRW_render_to_image(RenderEngine *engine, struct Depsgraph *depsgraph)
 
   ViewportEngineData *data = drw_viewport_engine_data_ensure(draw_engine_type);
 
-  /* set default viewport */
-  glViewport(0, 0, size[0], size[1]);
-
   /* Main rendering. */
   rctf view_rect;
   rcti render_rect;
@@ -1809,12 +1806,15 @@ void DRW_render_to_image(RenderEngine *engine, struct Depsgraph *depsgraph)
   /* Reset state before drawing */
   DRW_state_reset();
 
+  /* set default viewport */
+  GPU_viewport(0, 0, size[0], size[1]);
+
   /* Init render result. */
   RenderResult *render_result = RE_engine_begin_result(engine,
                                                        0,
                                                        0,
-                                                       (int)size[0],
+                                                       size[0],
-                                                       (int)size[1],
+                                                       size[1],
                                                        view_layer->name,
                                                        /* RR_ALL_VIEWS */ NULL);
 

source/blender/editors/gpencil/gpencil_utils.c

@@ -1772,7 +1772,7 @@ void ED_gpencil_brush_draw_eraser(Brush *brush, int x, int y)
   immBindBuiltinProgram(GPU_SHADER_2D_LINE_DASHED_UNIFORM_COLOR);
 
   float viewport_size[4];
-  glGetFloatv(GL_VIEWPORT, viewport_size);
+  GPU_viewport_size_get_f(viewport_size);
   immUniform2f("viewport_size", viewport_size[2], viewport_size[3]);
 
   immUniformColor4f(1.0f, 0.39f, 0.39f, 0.78f);

source/blender/gpu/GPU_state.h

@@ -63,6 +63,7 @@ void GPU_program_point_size(bool enable);
 void GPU_scissor(int x, int y, int width, int height);
 void GPU_scissor_get_f(float coords[4]);
 void GPU_scissor_get_i(int coords[4]);
+void GPU_viewport(int x, int y, int width, int height);
 void GPU_viewport_size_get_f(float coords[4]);
 void GPU_viewport_size_get_i(int coords[4]);
 void GPU_color_mask(bool r, bool g, bool b, bool a);

source/blender/gpu/intern/gpu_select_pick.c

@@ -320,7 +320,7 @@ void gpu_select_pick_begin(uint (*buffer)[4], uint bufsize, const rcti *input, c
     glDepthFunc(GL_LEQUAL);
 
     float viewport[4];
-    glGetFloatv(GL_VIEWPORT, viewport);
+    GPU_viewport_size_get_f(viewport);
 
     ps->src.clip_rect = *input;
     ps->src.rect_len = rect_len;
@@ -330,7 +330,7 @@ void gpu_select_pick_begin(uint (*buffer)[4], uint bufsize, const rcti *input, c
     ps->gl.clip_readpixels[2] = BLI_rcti_size_x(&ps->src.clip_rect);
     ps->gl.clip_readpixels[3] = BLI_rcti_size_y(&ps->src.clip_rect);
 
-    glViewport(UNPACK4(ps->gl.clip_readpixels));
+    GPU_viewport(UNPACK4(ps->gl.clip_readpixels));
 
     /* It's possible we don't want to clear depth buffer,
      * so existing elements are masked by current z-buffer. */

source/blender/gpu/intern/gpu_select_sample_query.c

@@ -94,8 +94,8 @@ void gpu_select_query_begin(
    * We need to get the region of the viewport so that our geometry doesn't
    * get rejected before the depth test. Should probably cull rect against
    * the viewport but this is a rare case I think */
-  glGetFloatv(GL_VIEWPORT, viewport);
+  GPU_viewport_size_get_f(viewport);
-  glViewport(viewport[0], viewport[1], BLI_rcti_size_x(input), BLI_rcti_size_y(input));
+  GPU_viewport(viewport[0], viewport[1], BLI_rcti_size_x(input), BLI_rcti_size_y(input));
 
   /* occlusion queries operates on fragments that pass tests and since we are interested on all
    * objects in the view frustum independently of their order, we need to disable the depth test */

source/blender/gpu/intern/gpu_state.c

@@ -151,6 +151,11 @@ void GPU_scissor(int x, int y, int width, int height)
   glScissor(x, y, width, height);
 }
 
+void GPU_viewport(int x, int y, int width, int height)
+{
+  glViewport(x, y, width, height);
+}
+
 void GPU_scissor_get_f(float coords[4])
 {
   glGetFloatv(GL_SCISSOR_BOX, coords);

source/blender/windowmanager/intern/wm_gesture.c

@@ -209,7 +209,7 @@ static void wm_gesture_draw_line(wmGesture *gt)
   immBindBuiltinProgram(GPU_SHADER_2D_LINE_DASHED_UNIFORM_COLOR);
 
   float viewport_size[4];
-  glGetFloatv(GL_VIEWPORT, viewport_size);
+  GPU_viewport_size_get_f(viewport_size);
   immUniform2f("viewport_size", viewport_size[2], viewport_size[3]);
 
   immUniform1i("colors_len", 2); /* "advanced" mode */
@@ -252,7 +252,7 @@ static void wm_gesture_draw_rect(wmGesture *gt)
   immBindBuiltinProgram(GPU_SHADER_2D_LINE_DASHED_UNIFORM_COLOR);
 
   float viewport_size[4];
-  glGetFloatv(GL_VIEWPORT, viewport_size);
+  GPU_viewport_size_get_f(viewport_size);
   immUniform2f("viewport_size", viewport_size[2], viewport_size[3]);
 
   immUniform1i("colors_len", 2); /* "advanced" mode */
@@ -291,7 +291,7 @@ static void wm_gesture_draw_circle(wmGesture *gt)
   immBindBuiltinProgram(GPU_SHADER_2D_LINE_DASHED_UNIFORM_COLOR);
 
   float viewport_size[4];
-  glGetFloatv(GL_VIEWPORT, viewport_size);
+  GPU_viewport_size_get_f(viewport_size);
   immUniform2f("viewport_size", viewport_size[2], viewport_size[3]);
 
   immUniform1i("colors_len", 2); /* "advanced" mode */
@@ -408,7 +408,7 @@ static void wm_gesture_draw_lasso(wmGesture *gt, bool filled)
   immBindBuiltinProgram(GPU_SHADER_2D_LINE_DASHED_UNIFORM_COLOR);
 
   float viewport_size[4];
-  glGetFloatv(GL_VIEWPORT, viewport_size);
+  GPU_viewport_size_get_f(viewport_size);
   immUniform2f("viewport_size", viewport_size[2], viewport_size[3]);
 
   immUniform1i("colors_len", 2); /* "advanced" mode */
@@ -442,7 +442,7 @@ static void wm_gesture_draw_cross(wmWindow *win, wmGesture *gt)
   immBindBuiltinProgram(GPU_SHADER_2D_LINE_DASHED_UNIFORM_COLOR);
 
   float viewport_size[4];
-  glGetFloatv(GL_VIEWPORT, viewport_size);
+  GPU_viewport_size_get_f(viewport_size);
   immUniform2f("viewport_size", viewport_size[2], viewport_size[3]);
 
   immUniform1i("colors_len", 2); /* "advanced" mode */

source/blender/windowmanager/intern/wm_playanim.c

@@ -1060,7 +1060,7 @@ static int ghost_event_proc(GHOST_EventHandle evt, GHOST_TUserDataPtr ps_void)
       /* zoom always show entire image */
       ps->zoom = MIN2(zoomx, zoomy);
 
-      glViewport(0, 0, ps->win_x, ps->win_y);
+      GPU_viewport(0, 0, ps->win_x, ps->win_y);
       glScissor(0, 0, ps->win_x, ps->win_y);
 
       playanim_gl_matrix();
@@ -1322,7 +1322,7 @@ static char *wm_main_playanim_intern(int argc, const char **argv)
 
   int win_x, win_y;
   playanim_window_get_size(&win_x, &win_y);
-  glViewport(0, 0, win_x, win_y);
+  GPU_viewport(0, 0, win_x, win_y);
   glScissor(0, 0, win_x, win_y);
   playanim_gl_matrix();
 

source/blender/windowmanager/intern/wm_subwindow.c

@@ -40,7 +40,7 @@ void wmViewport(const rcti *winrct)
   int width = BLI_rcti_size_x(winrct) + 1;
   int height = BLI_rcti_size_y(winrct) + 1;
 
-  glViewport(winrct->xmin, winrct->ymin, width, height);
+  GPU_viewport(winrct->xmin, winrct->ymin, width, height);
   glScissor(winrct->xmin, winrct->ymin, width, height);
 
   wmOrtho2_pixelspace(width, height);
@@ -79,7 +79,7 @@ void wmPartialViewport(rcti *drawrct, const rcti *winrct, const rcti *partialrct
     scissor_height += 1;
   }
 
-  glViewport(0, 0, width, height);
+  GPU_viewport(0, 0, width, height);
   glScissor(x, y, scissor_width, scissor_height);
 
   wmOrtho2_pixelspace(width, height);
@@ -91,7 +91,7 @@ void wmWindowViewport(wmWindow *win)
   int width = WM_window_pixels_x(win);
   int height = WM_window_pixels_y(win);
 
-  glViewport(0, 0, width, height);
+  GPU_viewport(0, 0, width, height);
   glScissor(0, 0, width, height);
 
   wmOrtho2_pixelspace(width, height);