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blender-archive/source/blender/blenkernel/intern/brush.c
Bastien Montagne eadfd901ad Optimization: pass Main to BKE_library_foreach_ID_link() and use its relations. 
Use Main->relations in BKE_library_foreach_ID_link(), when possible
(i.e. IDWALK_READONLY is set), and if the data is available of course.

This is quite minor optimization, no sensible improvements are expected,
but does not hurt either to avoid potentially tens of looping over e.g.
objects constraints and modifiers, or heap of drivers...
2017-01-30 22:33:20 +01:00

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/brush.c
* \ingroup bke
*/
#include "MEM_guardedalloc.h"
#include "DNA_brush_types.h"
#include "DNA_scene_types.h"
#include "DNA_object_types.h"
#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLI_rand.h"
#include "BKE_brush.h"
#include "BKE_colortools.h"
#include "BKE_global.h"
#include "BKE_library.h"
#include "BKE_library_query.h"
#include "BKE_library_remap.h"
#include "BKE_main.h"
#include "BKE_paint.h"
#include "BKE_texture.h"
#include "BKE_icons.h"
#include "IMB_colormanagement.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "RE_render_ext.h" /* externtex */
static RNG *brush_rng;
void BKE_brush_system_init(void)
{
brush_rng = BLI_rng_new(0);
BLI_rng_srandom(brush_rng, 31415682);
}
void BKE_brush_system_exit(void)
{
BLI_rng_free(brush_rng);
}
static void brush_defaults(Brush *brush)
{
brush->blend = 0;
brush->flag = 0;
brush->ob_mode = OB_MODE_ALL_PAINT;
/* BRUSH SCULPT TOOL SETTINGS */
brush->weight = 1.0f; /* weight of brush 0 - 1.0 */
brush->size = 35; /* radius of the brush in pixels */
brush->alpha = 0.5f; /* brush strength/intensity probably variable should be renamed? */
brush->autosmooth_factor = 0.0f;
brush->crease_pinch_factor = 0.5f;
brush->sculpt_plane = SCULPT_DISP_DIR_AREA;
brush->plane_offset = 0.0f; /* how far above or below the plane that is found by averaging the faces */
brush->plane_trim = 0.5f;
brush->clone.alpha = 0.5f;
brush->normal_weight = 0.0f;
brush->fill_threshold = 0.2f;
brush->flag |= BRUSH_ALPHA_PRESSURE;
/* BRUSH PAINT TOOL SETTINGS */
brush->rgb[0] = 1.0f; /* default rgb color of the brush when painting - white */
brush->rgb[1] = 1.0f;
brush->rgb[2] = 1.0f;
zero_v3(brush->secondary_rgb);
/* BRUSH STROKE SETTINGS */
brush->flag |= (BRUSH_SPACE | BRUSH_SPACE_ATTEN);
brush->spacing = 10; /* how far each brush dot should be spaced as a percentage of brush diameter */
brush->smooth_stroke_radius = 75;
brush->smooth_stroke_factor = 0.9f;
brush->rate = 0.1f; /* time delay between dots of paint or sculpting when doing airbrush mode */
brush->jitter = 0.0f;
/* BRUSH TEXTURE SETTINGS */
BKE_texture_mtex_default(&brush->mtex);
BKE_texture_mtex_default(&brush->mask_mtex);
brush->texture_sample_bias = 0; /* value to added to texture samples */
brush->texture_overlay_alpha = 33;
brush->mask_overlay_alpha = 33;
brush->cursor_overlay_alpha = 33;
brush->overlay_flags = 0;
/* brush appearance */
brush->add_col[0] = 1.00; /* add mode color is light red */
brush->add_col[1] = 0.39;
brush->add_col[2] = 0.39;
brush->sub_col[0] = 0.39; /* subtract mode color is light blue */
brush->sub_col[1] = 0.39;
brush->sub_col[2] = 1.00;
brush->stencil_pos[0] = 256;
brush->stencil_pos[1] = 256;
brush->stencil_dimension[0] = 256;
brush->stencil_dimension[1] = 256;
}
/* Datablock add/copy/free/make_local */
void BKE_brush_init(Brush *brush)
{
BLI_assert(MEMCMP_STRUCT_OFS_IS_ZERO(brush, id));
/* enable fake user by default */
id_fake_user_set(&brush->id);
brush_defaults(brush);
brush->sculpt_tool = SCULPT_TOOL_DRAW; /* sculpting defaults to the draw tool for new brushes */
/* the default alpha falloff curve */
BKE_brush_curve_preset(brush, CURVE_PRESET_SMOOTH);
}
Brush *BKE_brush_add(Main *bmain, const char *name, short ob_mode)
{
Brush *brush;
brush = BKE_libblock_alloc(bmain, ID_BR, name);
BKE_brush_init(brush);
brush->ob_mode = ob_mode;
return brush;
}
struct Brush *BKE_brush_first_search(struct Main *bmain, short ob_mode)
{
Brush *brush;
for (brush = bmain->brush.first; brush; brush = brush->id.next) {
if (brush->ob_mode & ob_mode)
return brush;
}
return NULL;
}
Brush *BKE_brush_copy(Main *bmain, Brush *brush)
{
Brush *brushn;
brushn = BKE_libblock_copy(bmain, &brush->id);
if (brush->mtex.tex)
id_us_plus((ID *)brush->mtex.tex);
if (brush->mask_mtex.tex)
id_us_plus((ID *)brush->mask_mtex.tex);
if (brush->paint_curve)
id_us_plus((ID *)brush->paint_curve);
if (brush->icon_imbuf)
brushn->icon_imbuf = IMB_dupImBuf(brush->icon_imbuf);
brushn->preview = NULL;
brushn->curve = curvemapping_copy(brush->curve);
/* enable fake user by default */
id_fake_user_set(&brush->id);
BKE_id_copy_ensure_local(bmain, &brush->id, &brushn->id);
return brushn;
}
/** Free (or release) any data used by this brush (does not free the brush itself). */
void BKE_brush_free(Brush *brush)
{
if (brush->icon_imbuf) {
IMB_freeImBuf(brush->icon_imbuf);
}
curvemapping_free(brush->curve);
MEM_SAFE_FREE(brush->gradient);
BKE_previewimg_free(&(brush->preview));
}
void BKE_brush_make_local(Main *bmain, Brush *brush, const bool lib_local)
{
bool is_local = false, is_lib = false;
/* - only lib users: do nothing (unless force_local is set)
* - only local users: set flag
* - mixed: make copy
*/
if (!ID_IS_LINKED_DATABLOCK(brush)) {
return;
}
if (brush->clone.image) {
/* Special case: ima always local immediately. Clone image should only have one user anyway. */
id_make_local(bmain, &brush->clone.image->id, false, false);
}
BKE_library_ID_test_usages(bmain, brush, &is_local, &is_lib);
if (lib_local || is_local) {
if (!is_lib) {
id_clear_lib_data(bmain, &brush->id);
BKE_id_expand_local(bmain, &brush->id);
/* enable fake user by default */
id_fake_user_set(&brush->id);
}
else {
Brush *brush_new = BKE_brush_copy(bmain, brush); /* Ensures FAKE_USER is set */
brush_new->id.us = 0;
/* setting newid is mandatory for complex make_lib_local logic... */
ID_NEW_SET(brush, brush_new);
if (!lib_local) {
BKE_libblock_remap(bmain, brush, brush_new, ID_REMAP_SKIP_INDIRECT_USAGE);
}
}
}
}
void BKE_brush_debug_print_state(Brush *br)
{
/* create a fake brush and set it to the defaults */
Brush def = {{NULL}};
brush_defaults(&def);
#define BR_TEST(field, t) \
if (br->field != def.field) \
printf("br->" #field " = %" #t ";\n", br->field)
#define BR_TEST_FLAG(_f) \
if ((br->flag & _f) && !(def.flag & _f)) \
printf("br->flag |= " #_f ";\n"); \
else if (!(br->flag & _f) && (def.flag & _f)) \
printf("br->flag &= ~" #_f ";\n")
#define BR_TEST_FLAG_OVERLAY(_f) \
if ((br->overlay_flags & _f) && !(def.overlay_flags & _f)) \
printf("br->overlay_flags |= " #_f ";\n"); \
else if (!(br->overlay_flags & _f) && (def.overlay_flags & _f)) \
printf("br->overlay_flags &= ~" #_f ";\n")
/* print out any non-default brush state */
BR_TEST(normal_weight, f);
BR_TEST(blend, d);
BR_TEST(size, d);
/* br->flag */
BR_TEST_FLAG(BRUSH_AIRBRUSH);
BR_TEST_FLAG(BRUSH_ALPHA_PRESSURE);
BR_TEST_FLAG(BRUSH_SIZE_PRESSURE);
BR_TEST_FLAG(BRUSH_JITTER_PRESSURE);
BR_TEST_FLAG(BRUSH_SPACING_PRESSURE);
BR_TEST_FLAG(BRUSH_ANCHORED);
BR_TEST_FLAG(BRUSH_DIR_IN);
BR_TEST_FLAG(BRUSH_SPACE);
BR_TEST_FLAG(BRUSH_SMOOTH_STROKE);
BR_TEST_FLAG(BRUSH_PERSISTENT);
BR_TEST_FLAG(BRUSH_ACCUMULATE);
BR_TEST_FLAG(BRUSH_LOCK_ALPHA);
BR_TEST_FLAG(BRUSH_ORIGINAL_NORMAL);
BR_TEST_FLAG(BRUSH_OFFSET_PRESSURE);
BR_TEST_FLAG(BRUSH_SPACE_ATTEN);
BR_TEST_FLAG(BRUSH_ADAPTIVE_SPACE);
BR_TEST_FLAG(BRUSH_LOCK_SIZE);
BR_TEST_FLAG(BRUSH_EDGE_TO_EDGE);
BR_TEST_FLAG(BRUSH_DRAG_DOT);
BR_TEST_FLAG(BRUSH_INVERSE_SMOOTH_PRESSURE);
BR_TEST_FLAG(BRUSH_PLANE_TRIM);
BR_TEST_FLAG(BRUSH_FRONTFACE);
BR_TEST_FLAG(BRUSH_CUSTOM_ICON);
BR_TEST_FLAG_OVERLAY(BRUSH_OVERLAY_CURSOR);
BR_TEST_FLAG_OVERLAY(BRUSH_OVERLAY_PRIMARY);
BR_TEST_FLAG_OVERLAY(BRUSH_OVERLAY_SECONDARY);
BR_TEST_FLAG_OVERLAY(BRUSH_OVERLAY_CURSOR_OVERRIDE_ON_STROKE);
BR_TEST_FLAG_OVERLAY(BRUSH_OVERLAY_PRIMARY_OVERRIDE_ON_STROKE);
BR_TEST_FLAG_OVERLAY(BRUSH_OVERLAY_SECONDARY_OVERRIDE_ON_STROKE);
BR_TEST(jitter, f);
BR_TEST(spacing, d);
BR_TEST(smooth_stroke_radius, d);
BR_TEST(smooth_stroke_factor, f);
BR_TEST(rate, f);
BR_TEST(alpha, f);
BR_TEST(sculpt_plane, d);
BR_TEST(plane_offset, f);
BR_TEST(autosmooth_factor, f);
BR_TEST(crease_pinch_factor, f);
BR_TEST(plane_trim, f);
BR_TEST(texture_sample_bias, f);
BR_TEST(texture_overlay_alpha, d);
BR_TEST(add_col[0], f);
BR_TEST(add_col[1], f);
BR_TEST(add_col[2], f);
BR_TEST(sub_col[0], f);
BR_TEST(sub_col[1], f);
BR_TEST(sub_col[2], f);
printf("\n");
#undef BR_TEST
#undef BR_TEST_FLAG
}
void BKE_brush_sculpt_reset(Brush *br)
{
/* enable this to see any non-default
* settings used by a brush: */
// BKE_brush_debug_print_state(br);
brush_defaults(br);
BKE_brush_curve_preset(br, CURVE_PRESET_SMOOTH);
switch (br->sculpt_tool) {
case SCULPT_TOOL_CLAY:
br->flag |= BRUSH_FRONTFACE;
break;
case SCULPT_TOOL_CREASE:
br->flag |= BRUSH_DIR_IN;
br->alpha = 0.25;
break;
case SCULPT_TOOL_FILL:
br->add_col[1] = 1;
br->sub_col[0] = 0.25;
br->sub_col[1] = 1;
break;
case SCULPT_TOOL_FLATTEN:
br->add_col[1] = 1;
br->sub_col[0] = 0.25;
br->sub_col[1] = 1;
break;
case SCULPT_TOOL_INFLATE:
br->add_col[0] = 0.750000;
br->add_col[1] = 0.750000;
br->add_col[2] = 0.750000;
br->sub_col[0] = 0.250000;
br->sub_col[1] = 0.250000;
br->sub_col[2] = 0.250000;
break;
case SCULPT_TOOL_NUDGE:
br->add_col[0] = 0.250000;
br->add_col[1] = 1.000000;
br->add_col[2] = 0.250000;
break;
case SCULPT_TOOL_PINCH:
br->add_col[0] = 0.750000;
br->add_col[1] = 0.750000;
br->add_col[2] = 0.750000;
br->sub_col[0] = 0.250000;
br->sub_col[1] = 0.250000;
br->sub_col[2] = 0.250000;
break;
case SCULPT_TOOL_SCRAPE:
br->add_col[1] = 1.000000;
br->sub_col[0] = 0.250000;
br->sub_col[1] = 1.000000;
break;
case SCULPT_TOOL_ROTATE:
br->alpha = 1.0;
break;
case SCULPT_TOOL_SMOOTH:
br->flag &= ~BRUSH_SPACE_ATTEN;
br->spacing = 5;
br->add_col[0] = 0.750000;
br->add_col[1] = 0.750000;
br->add_col[2] = 0.750000;
break;
case SCULPT_TOOL_GRAB:
case SCULPT_TOOL_SNAKE_HOOK:
case SCULPT_TOOL_THUMB:
br->size = 75;
br->flag &= ~BRUSH_ALPHA_PRESSURE;
br->flag &= ~BRUSH_SPACE;
br->flag &= ~BRUSH_SPACE_ATTEN;
br->add_col[0] = 0.250000;
br->add_col[1] = 1.000000;
br->add_col[2] = 0.250000;
break;
default:
break;
}
}
/**
* Library Operations
* \param preset CurveMappingPreset
*/
void BKE_brush_curve_preset(Brush *b, int preset)
{
CurveMap *cm = NULL;
if (!b->curve)
b->curve = curvemapping_add(1, 0, 0, 1, 1);
cm = b->curve->cm;
cm->flag &= ~CUMA_EXTEND_EXTRAPOLATE;
b->curve->preset = preset;
curvemap_reset(cm, &b->curve->clipr, b->curve->preset, CURVEMAP_SLOPE_NEGATIVE);
curvemapping_changed(b->curve, false);
}
/* XXX Unused function. */
int BKE_brush_texture_set_nr(Brush *brush, int nr)
{
ID *idtest, *id = NULL;
id = (ID *)brush->mtex.tex;
idtest = (ID *)BLI_findlink(&G.main->tex, nr - 1);
if (idtest == NULL) { /* new tex */
if (id) idtest = (ID *)BKE_texture_copy(G.main, (Tex *)id);
else idtest = (ID *)BKE_texture_add(G.main, "Tex");
id_us_min(idtest);
}
if (idtest != id) {
BKE_brush_texture_delete(brush);
brush->mtex.tex = (Tex *)idtest;
id_us_plus(idtest);
return 1;
}
return 0;
}
int BKE_brush_texture_delete(Brush *brush)
{
if (brush->mtex.tex)
id_us_min(&brush->mtex.tex->id);
return 1;
}
int BKE_brush_clone_image_set_nr(Brush *brush, int nr)
{
if (brush && nr > 0) {
Image *ima = (Image *)BLI_findlink(&G.main->image, nr - 1);
if (ima) {
BKE_brush_clone_image_delete(brush);
brush->clone.image = ima;
id_us_plus(&ima->id);
brush->clone.offset[0] = brush->clone.offset[1] = 0.0f;
return 1;
}
}
return 0;
}
int BKE_brush_clone_image_delete(Brush *brush)
{
if (brush && brush->clone.image) {
id_us_min(&brush->clone.image->id);
brush->clone.image = NULL;
return 1;
}
return 0;
}
/* Generic texture sampler for 3D painting systems. point has to be either in
* region space mouse coordinates, or 3d world coordinates for 3D mapping.
*
* rgba outputs straight alpha. */
float BKE_brush_sample_tex_3D(const Scene *scene, Brush *br,
const float point[3],
float rgba[4], const int thread,
struct ImagePool *pool)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
MTex *mtex = &br->mtex;
float intensity = 1.0;
bool hasrgb = false;
if (!mtex->tex) {
intensity = 1;
}
else if (mtex->brush_map_mode == MTEX_MAP_MODE_3D) {
/* Get strength by feeding the vertex
* location directly into a texture */
hasrgb = externtex(mtex, point, &intensity,
rgba, rgba + 1, rgba + 2, rgba + 3, thread, pool, false, false);
}
else if (mtex->brush_map_mode == MTEX_MAP_MODE_STENCIL) {
float rotation = -mtex->rot;
float point_2d[2] = {point[0], point[1]};
float x, y;
float co[3];
x = point_2d[0] - br->stencil_pos[0];
y = point_2d[1] - br->stencil_pos[1];
if (rotation > 0.001f || rotation < -0.001f) {
const float angle = atan2f(y, x) + rotation;
const float flen = sqrtf(x * x + y * y);
x = flen * cosf(angle);
y = flen * sinf(angle);
}
if (fabsf(x) > br->stencil_dimension[0] || fabsf(y) > br->stencil_dimension[1]) {
zero_v4(rgba);
return 0.0f;
}
x /= (br->stencil_dimension[0]);
y /= (br->stencil_dimension[1]);
co[0] = x;
co[1] = y;
co[2] = 0.0f;
hasrgb = externtex(mtex, co, &intensity,
rgba, rgba + 1, rgba + 2, rgba + 3, thread, pool, false, false);
}
else {
float rotation = -mtex->rot;
float point_2d[2] = {point[0], point[1]};
float x = 0.0f, y = 0.0f; /* Quite warnings */
float invradius = 1.0f; /* Quite warnings */
float co[3];
if (mtex->brush_map_mode == MTEX_MAP_MODE_VIEW) {
/* keep coordinates relative to mouse */
rotation += ups->brush_rotation;
x = point_2d[0] - ups->tex_mouse[0];
y = point_2d[1] - ups->tex_mouse[1];
/* use pressure adjusted size for fixed mode */
invradius = 1.0f / ups->pixel_radius;
}
else if (mtex->brush_map_mode == MTEX_MAP_MODE_TILED) {
/* leave the coordinates relative to the screen */
/* use unadjusted size for tiled mode */
invradius = 1.0f / BKE_brush_size_get(scene, br);
x = point_2d[0];
y = point_2d[1];
}
else if (mtex->brush_map_mode == MTEX_MAP_MODE_RANDOM) {
rotation += ups->brush_rotation;
/* these contain a random coordinate */
x = point_2d[0] - ups->tex_mouse[0];
y = point_2d[1] - ups->tex_mouse[1];
invradius = 1.0f / ups->pixel_radius;
}
x *= invradius;
y *= invradius;
/* it is probably worth optimizing for those cases where
* the texture is not rotated by skipping the calls to
* atan2, sqrtf, sin, and cos. */
if (rotation > 0.001f || rotation < -0.001f) {
const float angle = atan2f(y, x) + rotation;
const float flen = sqrtf(x * x + y * y);
x = flen * cosf(angle);
y = flen * sinf(angle);
}
co[0] = x;
co[1] = y;
co[2] = 0.0f;
hasrgb = externtex(mtex, co, &intensity,
rgba, rgba + 1, rgba + 2, rgba + 3, thread, pool, false, false);
}
intensity += br->texture_sample_bias;
if (!hasrgb) {
rgba[0] = intensity;
rgba[1] = intensity;
rgba[2] = intensity;
rgba[3] = 1.0f;
}
/* For consistency, sampling always returns color in linear space */
else if (ups->do_linear_conversion) {
IMB_colormanagement_colorspace_to_scene_linear_v3(rgba, ups->colorspace);
}
return intensity;
}
float BKE_brush_sample_masktex(const Scene *scene, Brush *br,
const float point[2],
const int thread,
struct ImagePool *pool)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
MTex *mtex = &br->mask_mtex;
float rgba[4], intensity;
if (!mtex->tex) {
return 1.0f;
}
if (mtex->brush_map_mode == MTEX_MAP_MODE_STENCIL) {
float rotation = -mtex->rot;
float point_2d[2] = {point[0], point[1]};
float x, y;
float co[3];
x = point_2d[0] - br->mask_stencil_pos[0];
y = point_2d[1] - br->mask_stencil_pos[1];
if (rotation > 0.001f || rotation < -0.001f) {
const float angle = atan2f(y, x) + rotation;
const float flen = sqrtf(x * x + y * y);
x = flen * cosf(angle);
y = flen * sinf(angle);
}
if (fabsf(x) > br->mask_stencil_dimension[0] || fabsf(y) > br->mask_stencil_dimension[1]) {
zero_v4(rgba);
return 0.0f;
}
x /= (br->mask_stencil_dimension[0]);
y /= (br->mask_stencil_dimension[1]);
co[0] = x;
co[1] = y;
co[2] = 0.0f;
externtex(mtex, co, &intensity,
rgba, rgba + 1, rgba + 2, rgba + 3, thread, pool, false, false);
}
else {
float rotation = -mtex->rot;
float point_2d[2] = {point[0], point[1]};
float x = 0.0f, y = 0.0f; /* Quite warnings */
float invradius = 1.0f; /* Quite warnings */
float co[3];
if (mtex->brush_map_mode == MTEX_MAP_MODE_VIEW) {
/* keep coordinates relative to mouse */
rotation += ups->brush_rotation_sec;
x = point_2d[0] - ups->mask_tex_mouse[0];
y = point_2d[1] - ups->mask_tex_mouse[1];
/* use pressure adjusted size for fixed mode */
invradius = 1.0f / ups->pixel_radius;
}
else if (mtex->brush_map_mode == MTEX_MAP_MODE_TILED) {
/* leave the coordinates relative to the screen */
/* use unadjusted size for tiled mode */
invradius = 1.0f / BKE_brush_size_get(scene, br);
x = point_2d[0];
y = point_2d[1];
}
else if (mtex->brush_map_mode == MTEX_MAP_MODE_RANDOM) {
rotation += ups->brush_rotation_sec;
/* these contain a random coordinate */
x = point_2d[0] - ups->mask_tex_mouse[0];
y = point_2d[1] - ups->mask_tex_mouse[1];
invradius = 1.0f / ups->pixel_radius;
}
x *= invradius;
y *= invradius;
/* it is probably worth optimizing for those cases where
* the texture is not rotated by skipping the calls to
* atan2, sqrtf, sin, and cos. */
if (rotation > 0.001f || rotation < -0.001f) {
const float angle = atan2f(y, x) + rotation;
const float flen = sqrtf(x * x + y * y);
x = flen * cosf(angle);
y = flen * sinf(angle);
}
co[0] = x;
co[1] = y;
co[2] = 0.0f;
externtex(mtex, co, &intensity,
rgba, rgba + 1, rgba + 2, rgba + 3, thread, pool, false, false);
}
CLAMP(intensity, 0.0f, 1.0f);
switch (br->mask_pressure) {
case BRUSH_MASK_PRESSURE_CUTOFF:
intensity = ((1.0f - intensity) < ups->size_pressure_value) ? 1.0f : 0.0f;
break;
case BRUSH_MASK_PRESSURE_RAMP:
intensity = ups->size_pressure_value + intensity * (1.0f - ups->size_pressure_value);
break;
default:
break;
}
return intensity;
}
/* Unified Size / Strength / Color */
/* XXX: be careful about setting size and unprojected radius
* because they depend on one another
* these functions do not set the other corresponding value
* this can lead to odd behavior if size and unprojected
* radius become inconsistent.
* the biggest problem is that it isn't possible to change
* unprojected radius because a view context is not
* available. my usual solution to this is to use the
* ratio of change of the size to change the unprojected
* radius. Not completely convinced that is correct.
* In any case, a better solution is needed to prevent
* inconsistency. */
const float *BKE_brush_color_get(const struct Scene *scene, const struct Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
return (ups->flag & UNIFIED_PAINT_COLOR) ? ups->rgb : brush->rgb;
}
const float *BKE_brush_secondary_color_get(const struct Scene *scene, const struct Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
return (ups->flag & UNIFIED_PAINT_COLOR) ? ups->secondary_rgb : brush->secondary_rgb;
}
void BKE_brush_color_set(struct Scene *scene, struct Brush *brush, const float color[3])
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
if (ups->flag & UNIFIED_PAINT_COLOR)
copy_v3_v3(ups->rgb, color);
else
copy_v3_v3(brush->rgb, color);
}
void BKE_brush_size_set(Scene *scene, Brush *brush, int size)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
/* make sure range is sane */
CLAMP(size, 1, MAX_BRUSH_PIXEL_RADIUS);
if (ups->flag & UNIFIED_PAINT_SIZE)
ups->size = size;
else
brush->size = size;
}
int BKE_brush_size_get(const Scene *scene, const Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
int size = (ups->flag & UNIFIED_PAINT_SIZE) ? ups->size : brush->size;
return size;
}
int BKE_brush_use_locked_size(const Scene *scene, const Brush *brush)
{
const short us_flag = scene->toolsettings->unified_paint_settings.flag;
return (us_flag & UNIFIED_PAINT_SIZE) ?
(us_flag & UNIFIED_PAINT_BRUSH_LOCK_SIZE) :
(brush->flag & BRUSH_LOCK_SIZE);
}
int BKE_brush_use_size_pressure(const Scene *scene, const Brush *brush)
{
const short us_flag = scene->toolsettings->unified_paint_settings.flag;
return (us_flag & UNIFIED_PAINT_SIZE) ?
(us_flag & UNIFIED_PAINT_BRUSH_SIZE_PRESSURE) :
(brush->flag & BRUSH_SIZE_PRESSURE);
}
int BKE_brush_use_alpha_pressure(const Scene *scene, const Brush *brush)
{
const short us_flag = scene->toolsettings->unified_paint_settings.flag;
return (us_flag & UNIFIED_PAINT_ALPHA) ?
(us_flag & UNIFIED_PAINT_BRUSH_ALPHA_PRESSURE) :
(brush->flag & BRUSH_ALPHA_PRESSURE);
}
void BKE_brush_unprojected_radius_set(Scene *scene, Brush *brush, float unprojected_radius)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
if (ups->flag & UNIFIED_PAINT_SIZE)
ups->unprojected_radius = unprojected_radius;
else
brush->unprojected_radius = unprojected_radius;
}
float BKE_brush_unprojected_radius_get(const Scene *scene, const Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
return (ups->flag & UNIFIED_PAINT_SIZE) ?
ups->unprojected_radius :
brush->unprojected_radius;
}
void BKE_brush_alpha_set(Scene *scene, Brush *brush, float alpha)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
if (ups->flag & UNIFIED_PAINT_ALPHA)
ups->alpha = alpha;
else
brush->alpha = alpha;
}
float BKE_brush_alpha_get(const Scene *scene, const Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
return (ups->flag & UNIFIED_PAINT_ALPHA) ? ups->alpha : brush->alpha;
}
float BKE_brush_weight_get(const Scene *scene, const Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
return (ups->flag & UNIFIED_PAINT_WEIGHT) ? ups->weight : brush->weight;
}
void BKE_brush_weight_set(const Scene *scene, Brush *brush, float value)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
if (ups->flag & UNIFIED_PAINT_WEIGHT)
ups->weight = value;
else
brush->weight = value;
}
/* scale unprojected radius to reflect a change in the brush's 2D size */
void BKE_brush_scale_unprojected_radius(float *unprojected_radius,
int new_brush_size,
int old_brush_size)
{
float scale = new_brush_size;
/* avoid division by zero */
if (old_brush_size != 0)
scale /= (float)old_brush_size;
(*unprojected_radius) *= scale;
}
/* scale brush size to reflect a change in the brush's unprojected radius */
void BKE_brush_scale_size(
int *r_brush_size,
float new_unprojected_radius,
float old_unprojected_radius)
{
float scale = new_unprojected_radius;
/* avoid division by zero */
if (old_unprojected_radius != 0)
scale /= new_unprojected_radius;
(*r_brush_size) = (int)((float)(*r_brush_size) * scale);
}
void BKE_brush_jitter_pos(const Scene *scene, Brush *brush, const float pos[2], float jitterpos[2])
{
float rand_pos[2];
float spread;
int diameter;
do {
rand_pos[0] = BLI_rng_get_float(brush_rng) - 0.5f;
rand_pos[1] = BLI_rng_get_float(brush_rng) - 0.5f;
} while (len_squared_v2(rand_pos) > SQUARE(0.5f));
if (brush->flag & BRUSH_ABSOLUTE_JITTER) {
diameter = 2 * brush->jitter_absolute;
spread = 1.0;
}
else {
diameter = 2 * BKE_brush_size_get(scene, brush);
spread = brush->jitter;
}
/* find random position within a circle of diameter 1 */
jitterpos[0] = pos[0] + 2 * rand_pos[0] * diameter * spread;
jitterpos[1] = pos[1] + 2 * rand_pos[1] * diameter * spread;
}
void BKE_brush_randomize_texture_coords(UnifiedPaintSettings *ups, bool mask)
{
/* we multiply with brush radius as an optimization for the brush
* texture sampling functions */
if (mask) {
ups->mask_tex_mouse[0] = BLI_rng_get_float(brush_rng) * ups->pixel_radius;
ups->mask_tex_mouse[1] = BLI_rng_get_float(brush_rng) * ups->pixel_radius;
}
else {
ups->tex_mouse[0] = BLI_rng_get_float(brush_rng) * ups->pixel_radius;
ups->tex_mouse[1] = BLI_rng_get_float(brush_rng) * ups->pixel_radius;
}
}
/* Uses the brush curve control to find a strength value */
float BKE_brush_curve_strength(Brush *br, float p, const float len)
{
float strength;
if (p >= len) return 0;
else p = p / len;
strength = curvemapping_evaluateF(br->curve, 0, p);
return strength;
}
/* Uses the brush curve control to find a strength value between 0 and 1 */
float BKE_brush_curve_strength_clamped(Brush *br, float p, const float len)
{
float strength = BKE_brush_curve_strength(br, p, len);
CLAMP(strength, 0.0f, 1.0f);
return strength;
}
/* TODO: should probably be unified with BrushPainter stuff? */
unsigned int *BKE_brush_gen_texture_cache(Brush *br, int half_side, bool use_secondary)
{
unsigned int *texcache = NULL;
MTex *mtex = (use_secondary) ? &br->mask_mtex : &br->mtex;
float intensity;
float rgba[4];
int ix, iy;
int side = half_side * 2;
if (mtex->tex) {
float x, y, step = 2.0 / side, co[3];
texcache = MEM_callocN(sizeof(int) * side * side, "Brush texture cache");
/* do normalized cannonical view coords for texture */
for (y = -1.0, iy = 0; iy < side; iy++, y += step) {
for (x = -1.0, ix = 0; ix < side; ix++, x += step) {
co[0] = x;
co[1] = y;
co[2] = 0.0f;
/* This is copied from displace modifier code */
/* TODO(sergey): brush are always cacheing with CM enabled for now. */
externtex(mtex, co, &intensity,
rgba, rgba + 1, rgba + 2, rgba + 3, 0, NULL, false, false);
((char *)texcache)[(iy * side + ix) * 4] =
((char *)texcache)[(iy * side + ix) * 4 + 1] =
((char *)texcache)[(iy * side + ix) * 4 + 2] =
((char *)texcache)[(iy * side + ix) * 4 + 3] = (char)(intensity * 255.0f);
}
}
}
return texcache;
}
/**** Radial Control ****/
struct ImBuf *BKE_brush_gen_radial_control_imbuf(Brush *br, bool secondary)
{
ImBuf *im = MEM_callocN(sizeof(ImBuf), "radial control texture");
unsigned int *texcache;
int side = 128;
int half = side / 2;
int i, j;
curvemapping_initialize(br->curve);
texcache = BKE_brush_gen_texture_cache(br, half, secondary);
im->rect_float = MEM_callocN(sizeof(float) * side * side, "radial control rect");
im->x = im->y = side;
for (i = 0; i < side; ++i) {
for (j = 0; j < side; ++j) {
float magn = sqrtf(pow2f(i - half) + pow2f(j - half));
im->rect_float[i * side + j] = BKE_brush_curve_strength_clamped(br, magn, half);
}
}
/* Modulate curve with texture */
if (texcache) {
for (i = 0; i < side; ++i) {
for (j = 0; j < side; ++j) {
const int col = texcache[i * side + j];
im->rect_float[i * side + j] *= (((char *)&col)[0] + ((char *)&col)[1] + ((char *)&col)[2]) / 3.0f / 255.0f;
}
}
MEM_freeN(texcache);
}
return im;
}
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