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blender-archive/source/blender/blenkernel/intern/brush.c

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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.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/brush.c
* \ingroup bke
*/
#include <math.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "DNA_brush_types.h"
#include "DNA_color_types.h"
#include "DNA_scene_types.h"
#include "DNA_object_types.h"
#include "DNA_windowmanager_types.h"
#include "WM_types.h"
#include "RNA_access.h"
#include "BLI_bpath.h"
#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLI_rand.h"
#include "BLI_utildefines.h"
#include "BKE_brush.h"
#include "BKE_colortools.h"
#include "BKE_global.h"
#include "BKE_image.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_paint.h"
#include "BKE_texture.h"
#include "BKE_icons.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "RE_render_ext.h" /* externtex */
#include "RE_shader_ext.h"
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->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;
/* 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 */
default_mtex(&brush->mtex);
brush->texture_sample_bias = 0; /* value to added to texture samples */
brush->texture_overlay_alpha = 33;
/* 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;
}
/* Datablock add/copy/free/make_local */
Brush *BKE_brush_add(const char *name)
{
Brush *brush;
brush = BKE_libblock_alloc(&G.main->brush, ID_BR, name);
/* enable fake user by default */
brush->id.flag |= LIB_FAKEUSER;
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);
return brush;
}
Brush *BKE_brush_copy(Brush *brush)
{
Brush *brushn;
brushn = BKE_libblock_copy(&brush->id);
if (brush->mtex.tex)
id_us_plus((ID *)brush->mtex.tex);
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 */
if (!(brushn->id.flag & LIB_FAKEUSER)) {
brushn->id.flag |= LIB_FAKEUSER;
brushn->id.us++;
}
return brushn;
}
/* not brush itself */
void BKE_brush_free(Brush *brush)
{
if (brush->mtex.tex)
brush->mtex.tex->id.us--;
if (brush->icon_imbuf)
IMB_freeImBuf(brush->icon_imbuf);
BKE_previewimg_free(&(brush->preview));
curvemapping_free(brush->curve);
}
static void extern_local_brush(Brush *brush)
{
id_lib_extern((ID *)brush->mtex.tex);
id_lib_extern((ID *)brush->clone.image);
}
void BKE_brush_make_local(Brush *brush)
{
/* - only lib users: do nothing
* - only local users: set flag
* - mixed: make copy
*/
Main *bmain = G.main;
Scene *scene;
int is_local = FALSE, is_lib = FALSE;
if (brush->id.lib == NULL) return;
if (brush->clone.image) {
/* special case: ima always local immediately. Clone image should only
* have one user anyway. */
id_clear_lib_data(bmain, &brush->clone.image->id);
extern_local_brush(brush);
}
for (scene = bmain->scene.first; scene && ELEM(0, is_lib, is_local); scene = scene->id.next) {
if (paint_brush(&scene->toolsettings->imapaint.paint) == brush) {
if (scene->id.lib) is_lib = TRUE;
else is_local = TRUE;
}
}
if (is_local && is_lib == FALSE) {
id_clear_lib_data(bmain, &brush->id);
extern_local_brush(brush);
/* enable fake user by default */
if (!(brush->id.flag & LIB_FAKEUSER)) {
brush->id.flag |= LIB_FAKEUSER;
brush->id.us++;
}
}
else if (is_local && is_lib) {
Brush *brush_new = BKE_brush_copy(brush);
brush_new->id.us = 1; /* only keep fake user */
brush_new->id.flag |= LIB_FAKEUSER;
/* Remap paths of new ID using old library as base. */
BKE_id_lib_local_paths(bmain, brush->id.lib, &brush_new->id);
for (scene = bmain->scene.first; scene; scene = scene->id.next) {
if (paint_brush(&scene->toolsettings->imapaint.paint) == brush) {
if (scene->id.lib == NULL) {
paint_brush_set(&scene->toolsettings->imapaint.paint, brush_new);
}
}
}
}
}
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")
/* 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_TORUS);
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_FIXED_TEX);
BR_TEST_FLAG(BRUSH_RAKE);
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_TEXTURE_OVERLAY);
BR_TEST_FLAG(BRUSH_EDGE_TO_EDGE);
BR_TEST_FLAG(BRUSH_RESTORE_MESH);
BR_TEST_FLAG(BRUSH_INVERSE_SMOOTH_PRESSURE);
BR_TEST_FLAG(BRUSH_RANDOM_ROTATION);
BR_TEST_FLAG(BRUSH_PLANE_TRIM);
BR_TEST_FLAG(BRUSH_FRONTFACE);
BR_TEST_FLAG(BRUSH_CUSTOM_ICON);
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 */
void BKE_brush_curve_preset(Brush *b, /*CurveMappingPreset*/ 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);
}
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((Tex *)id);
else idtest = (ID *)add_texture("Tex");
idtest->us--;
}
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)
brush->mtex.tex->id.us--;
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) {
brush->clone.image->id.us--;
brush->clone.image = NULL;
return 1;
}
return 0;
}
/* Brush Sampling */
void BKE_brush_sample_tex(const Scene *scene, Brush *brush, const float xy[2], float rgba[4], const int thread)
{
MTex *mtex = &brush->mtex;
if (mtex && mtex->tex) {
float co[3], tin, tr, tg, tb, ta;
int hasrgb;
const int radius = BKE_brush_size_get(scene, brush);
co[0] = xy[0] / radius;
co[1] = xy[1] / radius;
co[2] = 0.0f;
hasrgb = externtex(mtex, co, &tin, &tr, &tg, &tb, &ta, thread);
if (hasrgb) {
rgba[0] = tr;
rgba[1] = tg;
rgba[2] = tb;
rgba[3] = ta;
}
else {
rgba[0] = tin;
rgba[1] = tin;
rgba[2] = tin;
rgba[3] = 1.0f;
}
}
else {
rgba[0] = rgba[1] = rgba[2] = rgba[3] = 1.0f;
}
}
/* TODO, use define for 'texfall' arg */
void BKE_brush_imbuf_new(const Scene *scene, Brush *brush, short flt, short texfall, int bufsize, ImBuf **outbuf, int use_color_correction)
{
ImBuf *ibuf;
float xy[2], rgba[4], *dstf;
int x, y, rowbytes, xoff, yoff, imbflag;
const int radius = BKE_brush_size_get(scene, brush);
unsigned char *dst, crgb[3];
const float alpha = BKE_brush_alpha_get(scene, brush);
float brush_rgb[3];
imbflag = (flt) ? IB_rectfloat : IB_rect;
xoff = -bufsize / 2.0f + 0.5f;
yoff = -bufsize / 2.0f + 0.5f;
rowbytes = bufsize * 4;
if (*outbuf)
ibuf = *outbuf;
else
ibuf = IMB_allocImBuf(bufsize, bufsize, 32, imbflag);
if (flt) {
copy_v3_v3(brush_rgb, brush->rgb);
if (use_color_correction) {
srgb_to_linearrgb_v3_v3(brush_rgb, brush_rgb);
}
for (y = 0; y < ibuf->y; y++) {
dstf = ibuf->rect_float + y * rowbytes;
for (x = 0; x < ibuf->x; x++, dstf += 4) {
xy[0] = x + xoff;
xy[1] = y + yoff;
if (texfall == 0) {
copy_v3_v3(dstf, brush_rgb);
dstf[3] = alpha * BKE_brush_curve_strength_clamp(brush, len_v2(xy), radius);
}
else if (texfall == 1) {
BKE_brush_sample_tex(scene, brush, xy, dstf, 0);
}
else {
BKE_brush_sample_tex(scene, brush, xy, rgba, 0);
mul_v3_v3v3(dstf, rgba, brush_rgb);
dstf[3] = rgba[3] *alpha *BKE_brush_curve_strength_clamp(brush, len_v2(xy), radius);
}
}
}
}
else {
float alpha_f; /* final float alpha to convert to char */
rgb_float_to_uchar(crgb, brush->rgb);
for (y = 0; y < ibuf->y; y++) {
dst = (unsigned char *)ibuf->rect + y * rowbytes;
for (x = 0; x < ibuf->x; x++, dst += 4) {
xy[0] = x + xoff;
xy[1] = y + yoff;
if (texfall == 0) {
alpha_f = alpha * BKE_brush_curve_strength(brush, len_v2(xy), radius);
dst[0] = crgb[0];
dst[1] = crgb[1];
dst[2] = crgb[2];
dst[3] = FTOCHAR(alpha_f);
}
else if (texfall == 1) {
BKE_brush_sample_tex(scene, brush, xy, rgba, 0);
rgba_float_to_uchar(dst, rgba);
}
else if (texfall == 2) {
BKE_brush_sample_tex(scene, brush, xy, rgba, 0);
mul_v3_v3(rgba, brush->rgb);
alpha_f = rgba[3] *alpha *BKE_brush_curve_strength_clamp(brush, len_v2(xy), radius);
rgb_float_to_uchar(dst, rgba);
dst[3] = FTOCHAR(alpha_f);
}
else {
BKE_brush_sample_tex(scene, brush, xy, rgba, 0);
alpha_f = rgba[3] *alpha *BKE_brush_curve_strength_clamp(brush, len_v2(xy), radius);
dst[0] = crgb[0];
dst[1] = crgb[1];
dst[2] = crgb[2];
dst[3] = FTOCHAR(alpha_f);
}
}
}
}
*outbuf = ibuf;
}
/* Unified Size and Strength */
// 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 ussual 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 anycase, a better solution is needed to prevent
// inconsistency.
void BKE_brush_size_set(Scene *scene, Brush *brush, int size)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
if (ups->flag & UNIFIED_PAINT_SIZE)
ups->size = size;
else
brush->size = size;
}
int BKE_brush_size_get(const Scene *scene, Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
return (ups->flag & UNIFIED_PAINT_SIZE) ? ups->size : brush->size;
}
int BKE_brush_use_locked_size(const Scene *scene, 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, 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, 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, Brush *brush)
{
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
return (ups->flag & UNIFIED_PAINT_SIZE) ?
ups->unprojected_radius :
brush->unprojected_radius;
}
static void 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, 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, 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 *BKE_brush_size_get,
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;
(*BKE_brush_size_get) = (int)((float)(*BKE_brush_size_get) * scale);
}
/* Brush Painting */
typedef struct BrushPainterCache {
short enabled;
int size; /* size override, if 0 uses 2*BKE_brush_size_get(brush) */
short flt; /* need float imbuf? */
short texonly; /* no alpha, color or fallof, only texture in imbuf */
int lastsize;
float lastalpha;
float lastjitter;
ImBuf *ibuf;
ImBuf *texibuf;
ImBuf *maskibuf;
} BrushPainterCache;
struct BrushPainter {
Scene *scene;
Brush *brush;
float lastmousepos[2]; /* mouse position of last paint call */
float accumdistance; /* accumulated distance of brush since last paint op */
float lastpaintpos[2]; /* position of last paint op */
float startpaintpos[2]; /* position of first paint */
double accumtime; /* accumulated time since last paint op (airbrush) */
double lasttime; /* time of last update */
float lastpressure;
short firsttouch; /* first paint op */
float startsize;
float startalpha;
float startjitter;
float startspacing;
BrushPainterCache cache;
};
BrushPainter *BKE_brush_painter_new(Scene *scene, Brush *brush)
{
BrushPainter *painter = MEM_callocN(sizeof(BrushPainter), "BrushPainter");
painter->brush = brush;
painter->scene = scene;
painter->firsttouch = 1;
painter->cache.lastsize = -1; /* force ibuf create in refresh */
painter->startsize = BKE_brush_size_get(scene, brush);
painter->startalpha = BKE_brush_alpha_get(scene, brush);
painter->startjitter = brush->jitter;
painter->startspacing = brush->spacing;
return painter;
}
void BKE_brush_painter_require_imbuf(BrushPainter *painter, short flt, short texonly, int size)
{
if ((painter->cache.flt != flt) || (painter->cache.size != size) ||
((painter->cache.texonly != texonly) && texonly))
{
if (painter->cache.ibuf) IMB_freeImBuf(painter->cache.ibuf);
if (painter->cache.maskibuf) IMB_freeImBuf(painter->cache.maskibuf);
painter->cache.ibuf = painter->cache.maskibuf = NULL;
painter->cache.lastsize = -1; /* force ibuf create in refresh */
}
if (painter->cache.flt != flt) {
if (painter->cache.texibuf) IMB_freeImBuf(painter->cache.texibuf);
painter->cache.texibuf = NULL;
painter->cache.lastsize = -1; /* force ibuf create in refresh */
}
painter->cache.size = size;
painter->cache.flt = flt;
painter->cache.texonly = texonly;
painter->cache.enabled = 1;
}
void BKE_brush_painter_free(BrushPainter *painter)
{
Brush *brush = painter->brush;
BKE_brush_size_set(painter->scene, brush, painter->startsize);
brush_alpha_set(painter->scene, brush, painter->startalpha);
brush->jitter = painter->startjitter;
brush->spacing = painter->startspacing;
if (painter->cache.ibuf) IMB_freeImBuf(painter->cache.ibuf);
if (painter->cache.texibuf) IMB_freeImBuf(painter->cache.texibuf);
if (painter->cache.maskibuf) IMB_freeImBuf(painter->cache.maskibuf);
MEM_freeN(painter);
}
static void brush_painter_do_partial(BrushPainter *painter, ImBuf *oldtexibuf,
int x, int y, int w, int h, int xt, int yt,
const float pos[2])
{
Scene *scene = painter->scene;
Brush *brush = painter->brush;
ImBuf *ibuf, *maskibuf, *texibuf;
float *bf, *mf, *tf, *otf = NULL, xoff, yoff, xy[2], rgba[4];
unsigned char *b, *m, *t, *ot = NULL;
int dotexold, origx = x, origy = y;
const int radius = BKE_brush_size_get(painter->scene, brush);
xoff = -radius + 0.5f;
yoff = -radius + 0.5f;
xoff += (int)pos[0] - (int)painter->startpaintpos[0];
yoff += (int)pos[1] - (int)painter->startpaintpos[1];
ibuf = painter->cache.ibuf;
texibuf = painter->cache.texibuf;
maskibuf = painter->cache.maskibuf;
dotexold = (oldtexibuf != NULL);
/* not sure if it's actually needed or it's a mistake in coords/sizes
* calculation in brush_painter_fixed_tex_partial_update(), but without this
* limitation memory gets corrupted at fast strokes with quite big spacing (sergey) */
w = MIN2(w, ibuf->x);
h = MIN2(h, ibuf->y);
if (painter->cache.flt) {
for (; y < h; y++) {
bf = ibuf->rect_float + (y * ibuf->x + origx) * 4;
tf = texibuf->rect_float + (y * texibuf->x + origx) * 4;
mf = maskibuf->rect_float + (y * maskibuf->x + origx) * 4;
if (dotexold)
otf = oldtexibuf->rect_float + ((y - origy + yt) * oldtexibuf->x + xt) * 4;
for (x = origx; x < w; x++, bf += 4, mf += 4, tf += 4) {
if (dotexold) {
copy_v3_v3(tf, otf);
tf[3] = otf[3];
otf += 4;
}
else {
xy[0] = x + xoff;
xy[1] = y + yoff;
BKE_brush_sample_tex(scene, brush, xy, tf, 0);
}
bf[0] = tf[0] * mf[0];
bf[1] = tf[1] * mf[1];
bf[2] = tf[2] * mf[2];
bf[3] = tf[3] * mf[3];
}
}
}
else {
for (; y < h; y++) {
b = (unsigned char *)ibuf->rect + (y * ibuf->x + origx) * 4;
t = (unsigned char *)texibuf->rect + (y * texibuf->x + origx) * 4;
m = (unsigned char *)maskibuf->rect + (y * maskibuf->x + origx) * 4;
if (dotexold)
ot = (unsigned char *)oldtexibuf->rect + ((y - origy + yt) * oldtexibuf->x + xt) * 4;
for (x = origx; x < w; x++, b += 4, m += 4, t += 4) {
if (dotexold) {
t[0] = ot[0];
t[1] = ot[1];
t[2] = ot[2];
t[3] = ot[3];
ot += 4;
}
else {
xy[0] = x + xoff;
xy[1] = y + yoff;
BKE_brush_sample_tex(scene, brush, xy, rgba, 0);
rgba_float_to_uchar(t, rgba);
}
b[0] = t[0] * m[0] / 255;
b[1] = t[1] * m[1] / 255;
b[2] = t[2] * m[2] / 255;
b[3] = t[3] * m[3] / 255;
}
}
}
}
static void brush_painter_fixed_tex_partial_update(BrushPainter *painter, const float pos[2])
{
const Scene *scene = painter->scene;
Brush *brush = painter->brush;
BrushPainterCache *cache = &painter->cache;
ImBuf *oldtexibuf, *ibuf;
int imbflag, destx, desty, srcx, srcy, w, h, x1, y1, x2, y2;
const int diameter = 2 * BKE_brush_size_get(scene, brush);
imbflag = (cache->flt) ? IB_rectfloat : IB_rect;
if (!cache->ibuf)
cache->ibuf = IMB_allocImBuf(diameter, diameter, 32, imbflag);
ibuf = cache->ibuf;
oldtexibuf = cache->texibuf;
cache->texibuf = IMB_allocImBuf(diameter, diameter, 32, imbflag);
if (oldtexibuf) {
srcx = srcy = 0;
destx = (int)painter->lastpaintpos[0] - (int)pos[0];
desty = (int)painter->lastpaintpos[1] - (int)pos[1];
w = oldtexibuf->x;
h = oldtexibuf->y;
IMB_rectclip(cache->texibuf, oldtexibuf, &destx, &desty, &srcx, &srcy, &w, &h);
}
else {
srcx = srcy = 0;
destx = desty = 0;
w = h = 0;
}
x1 = destx;
y1 = desty;
x2 = destx + w;
y2 = desty + h;
/* blend existing texture in new position */
if ((x1 < x2) && (y1 < y2))
brush_painter_do_partial(painter, oldtexibuf, x1, y1, x2, y2, srcx, srcy, pos);
if (oldtexibuf)
IMB_freeImBuf(oldtexibuf);
/* sample texture in new areas */
if ((0 < x1) && (0 < ibuf->y))
brush_painter_do_partial(painter, NULL, 0, 0, x1, ibuf->y, 0, 0, pos);
if ((x2 < ibuf->x) && (0 < ibuf->y))
brush_painter_do_partial(painter, NULL, x2, 0, ibuf->x, ibuf->y, 0, 0, pos);
if ((x1 < x2) && (0 < y1))
brush_painter_do_partial(painter, NULL, x1, 0, x2, y1, 0, 0, pos);
if ((x1 < x2) && (y2 < ibuf->y))
brush_painter_do_partial(painter, NULL, x1, y2, x2, ibuf->y, 0, 0, pos);
}
static void brush_painter_refresh_cache(BrushPainter *painter, const float pos[2], int use_color_correction)
{
const Scene *scene = painter->scene;
Brush *brush = painter->brush;
BrushPainterCache *cache = &painter->cache;
MTex *mtex = &brush->mtex;
int size;
short flt;
const int diameter = 2 * BKE_brush_size_get(scene, brush);
const float alpha = BKE_brush_alpha_get(scene, brush);
if (diameter != cache->lastsize ||
alpha != cache->lastalpha ||
brush->jitter != cache->lastjitter)
{
if (cache->ibuf) {
IMB_freeImBuf(cache->ibuf);
cache->ibuf = NULL;
}
if (cache->maskibuf) {
IMB_freeImBuf(cache->maskibuf);
cache->maskibuf = NULL;
}
flt = cache->flt;
size = (cache->size) ? cache->size : diameter;
if (brush->flag & BRUSH_FIXED_TEX) {
BKE_brush_imbuf_new(scene, brush, flt, 3, size, &cache->maskibuf, use_color_correction);
brush_painter_fixed_tex_partial_update(painter, pos);
}
else
BKE_brush_imbuf_new(scene, brush, flt, 2, size, &cache->ibuf, use_color_correction);
cache->lastsize = diameter;
cache->lastalpha = alpha;
cache->lastjitter = brush->jitter;
}
else if ((brush->flag & BRUSH_FIXED_TEX) && mtex && mtex->tex) {
int dx = (int)painter->lastpaintpos[0] - (int)pos[0];
int dy = (int)painter->lastpaintpos[1] - (int)pos[1];
if ((dx != 0) || (dy != 0))
brush_painter_fixed_tex_partial_update(painter, pos);
}
}
void BKE_brush_painter_break_stroke(BrushPainter *painter)
{
painter->firsttouch = 1;
}
static void brush_pressure_apply(BrushPainter *painter, Brush *brush, float pressure)
{
if (BKE_brush_use_alpha_pressure(painter->scene, brush))
brush_alpha_set(painter->scene, brush, maxf(0.0f, painter->startalpha * pressure));
if (BKE_brush_use_size_pressure(painter->scene, brush))
BKE_brush_size_set(painter->scene, brush, maxf(1.0f, painter->startsize * pressure));
if (brush->flag & BRUSH_JITTER_PRESSURE)
brush->jitter = maxf(0.0f, painter->startjitter * pressure);
if (brush->flag & BRUSH_SPACING_PRESSURE)
brush->spacing = maxf(1.0f, painter->startspacing * (1.5f - pressure));
}
void BKE_brush_jitter_pos(const Scene *scene, Brush *brush, const float pos[2], float jitterpos[2])
{
int use_jitter = brush->jitter != 0;
/* jitter-ed brush gives weird and unpredictable result for this
* kinds of stroke, so manually disable jitter usage (sergey) */
use_jitter &= (brush->flag & (BRUSH_RESTORE_MESH | BRUSH_ANCHORED)) == 0;
if (use_jitter) {
float rand_pos[2];
const int radius = BKE_brush_size_get(scene, brush);
const int diameter = 2 * radius;
/* find random position within a circle of diameter 1 */
do {
rand_pos[0] = BLI_frand() - 0.5f;
rand_pos[1] = BLI_frand() - 0.5f;
} while (len_v2(rand_pos) > 0.5f);
jitterpos[0] = pos[0] + 2 * rand_pos[0] * diameter * brush->jitter;
jitterpos[1] = pos[1] + 2 * rand_pos[1] * diameter * brush->jitter;
}
else {
copy_v2_v2(jitterpos, pos);
}
}
int BKE_brush_painter_paint(BrushPainter *painter, BrushFunc func, const float pos[2], double time, float pressure,
void *user, int use_color_correction)
{
Scene *scene = painter->scene;
Brush *brush = painter->brush;
int totpaintops = 0;
if (pressure == 0.0f) {
if (painter->lastpressure) // XXX - hack, operator misses
pressure = painter->lastpressure;
else
pressure = 1.0f; /* zero pressure == not using tablet */
}
if (painter->firsttouch) {
/* paint exactly once on first touch */
painter->startpaintpos[0] = pos[0];
painter->startpaintpos[1] = pos[1];
brush_pressure_apply(painter, brush, pressure);
if (painter->cache.enabled)
brush_painter_refresh_cache(painter, pos, use_color_correction);
totpaintops += func(user, painter->cache.ibuf, pos, pos);
painter->lasttime = time;
painter->firsttouch = 0;
painter->lastpaintpos[0] = pos[0];
painter->lastpaintpos[1] = pos[1];
}
#if 0
else if (painter->brush->flag & BRUSH_AIRBRUSH) {
float spacing, step, paintpos[2], dmousepos[2], len;
double starttime, curtime = time;
/* compute brush spacing adapted to brush size */
spacing = brush->rate; //radius*brush->spacing*0.01f;
/* setup starting time, direction vector and accumulated time */
starttime = painter->accumtime;
sub_v2_v2v2(dmousepos, pos, painter->lastmousepos);
len = normalize_v2(dmousepos);
painter->accumtime += curtime - painter->lasttime;
/* do paint op over unpainted time distance */
while (painter->accumtime >= spacing) {
step = (spacing - starttime) * len;
paintpos[0] = painter->lastmousepos[0] + dmousepos[0] * step;
paintpos[1] = painter->lastmousepos[1] + dmousepos[1] * step;
if (painter->cache.enabled)
brush_painter_refresh_cache(painter);
totpaintops += func(user, painter->cache.ibuf,
painter->lastpaintpos, paintpos);
painter->lastpaintpos[0] = paintpos[0];
painter->lastpaintpos[1] = paintpos[1];
painter->accumtime -= spacing;
starttime -= spacing;
}
painter->lasttime = curtime;
}
#endif
else {
float startdistance, spacing, step, paintpos[2], dmousepos[2], finalpos[2];
float t, len, press;
const int radius = BKE_brush_size_get(scene, brush);
/* compute brush spacing adapted to brush radius, spacing may depend
* on pressure, so update it */
brush_pressure_apply(painter, brush, painter->lastpressure);
spacing = maxf(1.0f, radius) * brush->spacing * 0.01f;
/* setup starting distance, direction vector and accumulated distance */
startdistance = painter->accumdistance;
sub_v2_v2v2(dmousepos, pos, painter->lastmousepos);
len = normalize_v2(dmousepos);
painter->accumdistance += len;
if (brush->flag & BRUSH_SPACE) {
/* do paint op over unpainted distance */
while ((len > 0.0f) && (painter->accumdistance >= spacing)) {
step = spacing - startdistance;
paintpos[0] = painter->lastmousepos[0] + dmousepos[0] * step;
paintpos[1] = painter->lastmousepos[1] + dmousepos[1] * step;
t = step / len;
press = (1.0f - t) * painter->lastpressure + t * pressure;
brush_pressure_apply(painter, brush, press);
spacing = maxf(1.0f, radius) * brush->spacing * 0.01f;
BKE_brush_jitter_pos(scene, brush, paintpos, finalpos);
if (painter->cache.enabled)
brush_painter_refresh_cache(painter, finalpos, use_color_correction);
totpaintops +=
func(user, painter->cache.ibuf, painter->lastpaintpos, finalpos);
painter->lastpaintpos[0] = paintpos[0];
painter->lastpaintpos[1] = paintpos[1];
painter->accumdistance -= spacing;
startdistance -= spacing;
}
}
else {
BKE_brush_jitter_pos(scene, brush, pos, finalpos);
if (painter->cache.enabled)
brush_painter_refresh_cache(painter, finalpos, use_color_correction);
totpaintops += func(user, painter->cache.ibuf, pos, finalpos);
painter->lastpaintpos[0] = pos[0];
painter->lastpaintpos[1] = pos[1];
painter->accumdistance = 0;
}
/* do airbrush paint ops, based on the number of paint ops left over
* from regular painting. this is a temporary solution until we have
* accurate time stamps for mouse move events */
if (brush->flag & BRUSH_AIRBRUSH) {
double curtime = time;
double painttime = brush->rate * totpaintops;
painter->accumtime += curtime - painter->lasttime;
if (painter->accumtime <= painttime)
painter->accumtime = 0.0;
else
painter->accumtime -= painttime;
while (painter->accumtime >= (double)brush->rate) {
brush_pressure_apply(painter, brush, pressure);
BKE_brush_jitter_pos(scene, brush, pos, finalpos);
if (painter->cache.enabled)
brush_painter_refresh_cache(painter, finalpos, use_color_correction);
totpaintops +=
func(user, painter->cache.ibuf, painter->lastmousepos, finalpos);
painter->accumtime -= (double)brush->rate;
}
painter->lasttime = curtime;
}
}
painter->lastmousepos[0] = pos[0];
painter->lastmousepos[1] = pos[1];
painter->lastpressure = pressure;
brush_alpha_set(scene, brush, painter->startalpha);
BKE_brush_size_set(scene, brush, painter->startsize);
brush->jitter = painter->startjitter;
brush->spacing = painter->startspacing;
return totpaintops;
}
/* Uses the brush curve control to find a strength value between 0 and 1 */
float BKE_brush_curve_strength_clamp(Brush *br, float p, const float len)
{
if (p >= len) return 0;
else p = p / len;
curvemapping_initialize(br->curve);
p = curvemapping_evaluateF(br->curve, 0, p);
if (p < 0.0f) p = 0.0f;
else if (p > 1.0f) p = 1.0f;
return p;
}
/* same as above but can return negative values if the curve enables
* used for sculpt only */
float BKE_brush_curve_strength(Brush *br, float p, const float len)
{
if (p >= len)
p = 1.0f;
else
p = p / len;
curvemapping_initialize(br->curve);
return curvemapping_evaluateF(br->curve, 0, p);
}
/* TODO: should probably be unified with BrushPainter stuff? */
unsigned int *BKE_brush_gen_texture_cache(Brush *br, int half_side)
{
unsigned int *texcache = NULL;
MTex *mtex = &br->mtex;
TexResult texres = {0};
int hasrgb, 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");
BKE_image_get_ibuf(mtex->tex->ima, NULL);
/*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 */
hasrgb = multitex_ext(mtex->tex, co, NULL, NULL, 0, &texres);
/* if the texture gave an RGB value, we assume it didn't give a valid
* intensity, so calculate one (formula from do_material_tex).
* if the texture didn't give an RGB value, copy the intensity across
*/
if (hasrgb & TEX_RGB)
texres.tin = rgb_to_grayscale(&texres.tr);
((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)(texres.tin * 255.0f);
}
}
}
return texcache;
}
/**** Radial Control ****/
struct ImBuf *BKE_brush_gen_radial_control_imbuf(Brush *br)
{
ImBuf *im = MEM_callocN(sizeof(ImBuf), "radial control texture");
unsigned int *texcache;
int side = 128;
int half = side / 2;
int i, j;
texcache = BKE_brush_gen_texture_cache(br, half);
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(powf(i - half, 2) + powf(j - half, 2));
im->rect_float[i * side + j] = BKE_brush_curve_strength_clamp(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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