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tornavis/source/blender/editors/sculpt_paint/paint_image_2d.cc

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/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bke
*/
#include <cstring>
#include "MEM_guardedalloc.h"
#include "DNA_brush_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_space_types.h"
#include "BLI_bitmap.h"
#include "BLI_listbase.h"
#include "BLI_math_color_blend.h"
#include "BLI_stack.h"
#include "BLI_task.h"
#include "BKE_brush.hh"
#include "BKE_colorband.hh"
#include "BKE_context.hh"
#include "BKE_image.h"
#include "BKE_paint.hh"
#include "BKE_report.hh"
#include "DEG_depsgraph.hh"
#include "ED_paint.hh"
#include "ED_screen.hh"
#include "IMB_colormanagement.hh"
#include "IMB_imbuf.hh"
#include "IMB_imbuf_types.hh"
#include "WM_api.hh"
#include "WM_types.hh"
#include "UI_view2d.hh"
#include "paint_intern.hh"
/* Brush Painting for 2D image editor */
/* Defines and Structs */
struct BrushPainterCache {
bool use_float; /* need float imbuf? */
bool use_color_correction; /* use color correction for float */
bool invert;
bool is_texbrush;
bool is_maskbrush;
int lastdiameter;
float last_tex_rotation;
float last_mask_rotation;
float last_pressure;
ImBuf *ibuf;
ImBuf *texibuf;
ushort *tex_mask;
ushort *tex_mask_old;
uint tex_mask_old_w;
uint tex_mask_old_h;
CurveMaskCache curve_mask_cache;
int image_size[2];
};
struct BrushPainter {
Scene *scene;
Brush *brush;
bool firsttouch; /* first paint op */
ImagePool *pool; /* image pool */
rctf tex_mapping; /* texture coordinate mapping */
rctf mask_mapping; /* mask texture coordinate mapping */
bool cache_invert;
};
struct ImagePaintRegion {
int destx, desty;
int srcx, srcy;
int width, height;
};
enum ImagePaintTileState {
PAINT2D_TILE_UNINITIALIZED = 0,
PAINT2D_TILE_MISSING,
PAINT2D_TILE_READY,
};
struct ImagePaintTile {
ImageUser iuser;
ImBuf *canvas;
float radius_fac;
int size[2];
float uv_origin[2]; /* Stores the position of this tile in UV space. */
bool need_redraw;
BrushPainterCache cache;
ImagePaintTileState state;
float last_paintpos[2]; /* position of last paint op */
float start_paintpos[2]; /* position of first paint */
};
struct ImagePaintState {
BrushPainter *painter;
SpaceImage *sima;
View2D *v2d;
Scene *scene;
Brush *brush;
short tool, blend;
Image *image;
ImBuf *clonecanvas;
bool do_masking;
int symmetry;
ImagePaintTile *tiles;
int num_tiles;
BlurKernel *blurkernel;
};
static BrushPainter *brush_painter_2d_new(Scene *scene, Brush *brush, bool invert)
{
BrushPainter *painter = MEM_cnew<BrushPainter>(__func__);
painter->brush = brush;
painter->scene = scene;
painter->firsttouch = true;
painter->cache_invert = invert;
return painter;
}
static void brush_painter_2d_require_imbuf(
Brush *brush, ImagePaintTile *tile, bool use_float, bool use_color_correction, bool invert)
{
BrushPainterCache *cache = &tile->cache;
if (cache->use_float != use_float) {
if (cache->ibuf) {
IMB_freeImBuf(cache->ibuf);
}
if (cache->tex_mask) {
MEM_freeN(cache->tex_mask);
}
if (cache->tex_mask_old) {
MEM_freeN(cache->tex_mask_old);
}
cache->ibuf = nullptr;
cache->tex_mask = nullptr;
cache->lastdiameter = -1; /* force ibuf create in refresh */
}
cache->use_float = use_float;
cache->use_color_correction = use_float && use_color_correction;
cache->invert = invert;
cache->is_texbrush = (brush->mtex.tex && brush->imagepaint_tool == PAINT_TOOL_DRAW) ? true :
false;
cache->is_maskbrush = (brush->mask_mtex.tex) ? true : false;
}
static void brush_painter_cache_2d_free(BrushPainterCache *cache)
{
if (cache->ibuf) {
IMB_freeImBuf(cache->ibuf);
}
if (cache->texibuf) {
IMB_freeImBuf(cache->texibuf);
}
paint_curve_mask_cache_free_data(&cache->curve_mask_cache);
if (cache->tex_mask) {
MEM_freeN(cache->tex_mask);
}
if (cache->tex_mask_old) {
MEM_freeN(cache->tex_mask_old);
}
}
static void brush_imbuf_tex_co(const rctf *mapping, int x, int y, float texco[3])
{
texco[0] = mapping->xmin + x * mapping->xmax;
texco[1] = mapping->ymin + y * mapping->ymax;
texco[2] = 0.0f;
}
/* create a mask with the mask texture */
static ushort *brush_painter_mask_ibuf_new(BrushPainter *painter, const int size)
{
Scene *scene = painter->scene;
Brush *brush = painter->brush;
rctf mask_mapping = painter->mask_mapping;
ImagePool *pool = painter->pool;
float texco[3];
ushort *mask, *m;
int x, y, thread = 0;
mask = static_cast<ushort *>(MEM_mallocN(sizeof(ushort) * size * size, __func__));
m = mask;
for (y = 0; y < size; y++) {
for (x = 0; x < size; x++, m++) {
float res;
brush_imbuf_tex_co(&mask_mapping, x, y, texco);
res = BKE_brush_sample_masktex(scene, brush, texco, thread, pool);
*m = ushort(65535.0f * res);
}
}
return mask;
}
/* update rectangular section of the brush image */
static void brush_painter_mask_imbuf_update(BrushPainter *painter,
ImagePaintTile *tile,
const ushort *tex_mask_old,
int origx,
int origy,
int w,
int h,
int xt,
int yt,
const int diameter)
{
Scene *scene = painter->scene;
Brush *brush = painter->brush;
BrushPainterCache *cache = &tile->cache;
rctf tex_mapping = painter->mask_mapping;
ImagePool *pool = painter->pool;
ushort res;
bool use_texture_old = (tex_mask_old != nullptr);
int x, y, thread = 0;
ushort *tex_mask = cache->tex_mask;
ushort *tex_mask_cur = cache->tex_mask_old;
/* fill pixels */
for (y = origy; y < h; y++) {
for (x = origx; x < w; x++) {
/* sample texture */
float texco[3];
/* handle byte pixel */
ushort *b = tex_mask + (y * diameter + x);
ushort *t = tex_mask_cur + (y * diameter + x);
if (!use_texture_old) {
brush_imbuf_tex_co(&tex_mapping, x, y, texco);
res = ushort(65535.0f * BKE_brush_sample_masktex(scene, brush, texco, thread, pool));
}
/* read from old texture buffer */
if (use_texture_old) {
res = *(tex_mask_old + ((y - origy + yt) * cache->tex_mask_old_w + (x - origx + xt)));
}
/* write to new texture mask */
*t = res;
/* write to mask image buffer */
*b = res;
}
}
}
/**
* Update the brush mask image by trying to reuse the cached texture result.
* This can be considerably faster for brushes that change size due to pressure or
* textures that stick to the surface where only part of the pixels are new
*/
static void brush_painter_mask_imbuf_partial_update(BrushPainter *painter,
ImagePaintTile *tile,
const float pos[2],
const int diameter)
{
BrushPainterCache *cache = &tile->cache;
ushort *tex_mask_old;
int destx, desty, srcx, srcy, w, h, x1, y1, x2, y2;
/* create brush image buffer if it didn't exist yet */
if (!cache->tex_mask) {
cache->tex_mask = static_cast<ushort *>(
MEM_mallocN(sizeof(ushort) * diameter * diameter, __func__));
}
/* create new texture image buffer with coordinates relative to old */
tex_mask_old = cache->tex_mask_old;
cache->tex_mask_old = static_cast<ushort *>(
MEM_mallocN(sizeof(ushort) * diameter * diameter, __func__));
if (tex_mask_old) {
ImBuf maskibuf;
ImBuf maskibuf_old;
maskibuf.x = diameter;
maskibuf.y = diameter;
maskibuf_old.x = cache->tex_mask_old_w;
maskibuf_old.y = cache->tex_mask_old_h;
srcx = srcy = 0;
w = cache->tex_mask_old_w;
h = cache->tex_mask_old_h;
destx = int(floorf(tile->last_paintpos[0])) - int(floorf(pos[0])) + (diameter / 2 - w / 2);
desty = int(floorf(tile->last_paintpos[1])) - int(floorf(pos[1])) + (diameter / 2 - h / 2);
/* hack, use temporary rects so that clipping works */
IMB_rectclip(&maskibuf, &maskibuf_old, &destx, &desty, &srcx, &srcy, &w, &h);
}
else {
srcx = srcy = 0;
destx = desty = 0;
w = h = 0;
}
x1 = min_ii(destx, diameter);
y1 = min_ii(desty, diameter);
x2 = min_ii(destx + w, diameter);
y2 = min_ii(desty + h, diameter);
/* blend existing texture in new position */
if ((x1 < x2) && (y1 < y2)) {
brush_painter_mask_imbuf_update(
painter, tile, tex_mask_old, x1, y1, x2, y2, srcx, srcy, diameter);
}
if (tex_mask_old) {
MEM_freeN(tex_mask_old);
}
/* sample texture in new areas */
if ((0 < x1) && (0 < diameter)) {
brush_painter_mask_imbuf_update(painter, tile, nullptr, 0, 0, x1, diameter, 0, 0, diameter);
}
if ((x2 < diameter) && (0 < diameter)) {
brush_painter_mask_imbuf_update(
painter, tile, nullptr, x2, 0, diameter, diameter, 0, 0, diameter);
}
if ((x1 < x2) && (0 < y1)) {
brush_painter_mask_imbuf_update(painter, tile, nullptr, x1, 0, x2, y1, 0, 0, diameter);
}
if ((x1 < x2) && (y2 < diameter)) {
brush_painter_mask_imbuf_update(painter, tile, nullptr, x1, y2, x2, diameter, 0, 0, diameter);
}
/* through with sampling, now update sizes */
cache->tex_mask_old_w = diameter;
cache->tex_mask_old_h = diameter;
}
/* create imbuf with brush color */
static ImBuf *brush_painter_imbuf_new(
BrushPainter *painter, ImagePaintTile *tile, const int size, float pressure, float distance)
{
Scene *scene = painter->scene;
Brush *brush = painter->brush;
BrushPainterCache *cache = &tile->cache;
const char *display_device = scene->display_settings.display_device;
ColorManagedDisplay *display = IMB_colormanagement_display_get_named(display_device);
rctf tex_mapping = painter->tex_mapping;
ImagePool *pool = painter->pool;
bool use_color_correction = cache->use_color_correction;
bool use_float = cache->use_float;
bool is_texbrush = cache->is_texbrush;
int x, y, thread = 0;
float brush_rgb[3];
/* allocate image buffer */
ImBuf *ibuf = IMB_allocImBuf(size, size, 32, (use_float) ? IB_rectfloat : IB_rect);
/* get brush color */
if (brush->imagepaint_tool == PAINT_TOOL_DRAW) {
paint_brush_color_get(
scene, brush, use_color_correction, cache->invert, distance, pressure, brush_rgb, display);
}
else {
brush_rgb[0] = 1.0f;
brush_rgb[1] = 1.0f;
brush_rgb[2] = 1.0f;
}
/* fill image buffer */
for (y = 0; y < size; y++) {
for (x = 0; x < size; x++) {
/* sample texture and multiply with brush color */
float texco[3], rgba[4];
if (is_texbrush) {
brush_imbuf_tex_co(&tex_mapping, x, y, texco);
const MTex *mtex = &brush->mtex;
BKE_brush_sample_tex_3d(scene, brush, mtex, texco, rgba, thread, pool);
/* TODO(sergey): Support texture paint color space. */
if (!use_float) {
IMB_colormanagement_scene_linear_to_display_v3(rgba, display);
}
mul_v3_v3(rgba, brush_rgb);
}
else {
copy_v3_v3(rgba, brush_rgb);
rgba[3] = 1.0f;
}
if (use_float) {
/* write to float pixel */
float *dstf = ibuf->float_buffer.data + (y * size + x) * 4;
mul_v3_v3fl(dstf, rgba, rgba[3]); /* premultiply */
dstf[3] = rgba[3];
}
else {
/* write to byte pixel */
uchar *dst = ibuf->byte_buffer.data + (y * size + x) * 4;
rgb_float_to_uchar(dst, rgba);
dst[3] = unit_float_to_uchar_clamp(rgba[3]);
}
}
}
return ibuf;
}
/* update rectangular section of the brush image */
static void brush_painter_imbuf_update(BrushPainter *painter,
ImagePaintTile *tile,
ImBuf *oldtexibuf,
int origx,
int origy,
int w,
int h,
int xt,
int yt)
{
Scene *scene = painter->scene;
Brush *brush = painter->brush;
const MTex *mtex = &brush->mtex;
BrushPainterCache *cache = &tile->cache;
const char *display_device = scene->display_settings.display_device;
ColorManagedDisplay *display = IMB_colormanagement_display_get_named(display_device);
rctf tex_mapping = painter->tex_mapping;
ImagePool *pool = painter->pool;
bool use_color_correction = cache->use_color_correction;
bool use_float = cache->use_float;
bool is_texbrush = cache->is_texbrush;
bool use_texture_old = (oldtexibuf != nullptr);
int x, y, thread = 0;
float brush_rgb[3];
ImBuf *ibuf = cache->ibuf;
ImBuf *texibuf = cache->texibuf;
/* get brush color */
if (brush->imagepaint_tool == PAINT_TOOL_DRAW) {
paint_brush_color_get(
scene, brush, use_color_correction, cache->invert, 0.0f, 1.0f, brush_rgb, display);
}
else {
brush_rgb[0] = 1.0f;
brush_rgb[1] = 1.0f;
brush_rgb[2] = 1.0f;
}
/* fill pixels */
for (y = origy; y < h; y++) {
for (x = origx; x < w; x++) {
/* sample texture and multiply with brush color */
float texco[3], rgba[4];
if (!use_texture_old) {
if (is_texbrush) {
brush_imbuf_tex_co(&tex_mapping, x, y, texco);
BKE_brush_sample_tex_3d(scene, brush, mtex, texco, rgba, thread, pool);
/* TODO(sergey): Support texture paint color space. */
if (!use_float) {
IMB_colormanagement_scene_linear_to_display_v3(rgba, display);
}
mul_v3_v3(rgba, brush_rgb);
}
else {
copy_v3_v3(rgba, brush_rgb);
rgba[3] = 1.0f;
}
}
if (use_float) {
/* handle float pixel */
float *bf = ibuf->float_buffer.data + (y * ibuf->x + x) * 4;
float *tf = texibuf->float_buffer.data + (y * texibuf->x + x) * 4;
/* read from old texture buffer */
if (use_texture_old) {
const float *otf = oldtexibuf->float_buffer.data +
((y - origy + yt) * oldtexibuf->x + (x - origx + xt)) * 4;
copy_v4_v4(rgba, otf);
}
/* write to new texture buffer */
copy_v4_v4(tf, rgba);
/* output premultiplied float image, mf was already premultiplied */
mul_v3_v3fl(bf, rgba, rgba[3]);
bf[3] = rgba[3];
}
else {
uchar crgba[4];
/* handle byte pixel */
uchar *b = ibuf->byte_buffer.data + (y * ibuf->x + x) * 4;
uchar *t = texibuf->byte_buffer.data + (y * texibuf->x + x) * 4;
/* read from old texture buffer */
if (use_texture_old) {
uchar *ot = oldtexibuf->byte_buffer.data +
((y - origy + yt) * oldtexibuf->x + (x - origx + xt)) * 4;
crgba[0] = ot[0];
crgba[1] = ot[1];
crgba[2] = ot[2];
crgba[3] = ot[3];
}
else {
rgba_float_to_uchar(crgba, rgba);
}
/* write to new texture buffer */
t[0] = crgba[0];
t[1] = crgba[1];
t[2] = crgba[2];
t[3] = crgba[3];
/* write to brush image buffer */
b[0] = crgba[0];
b[1] = crgba[1];
b[2] = crgba[2];
b[3] = crgba[3];
}
}
}
}
/* update the brush image by trying to reuse the cached texture result. this
* can be considerably faster for brushes that change size due to pressure or
* textures that stick to the surface where only part of the pixels are new */
static void brush_painter_imbuf_partial_update(BrushPainter *painter,
ImagePaintTile *tile,
const float pos[2],
const int diameter)
{
BrushPainterCache *cache = &tile->cache;
ImBuf *oldtexibuf, *ibuf;
int imbflag, destx, desty, srcx, srcy, w, h, x1, y1, x2, y2;
/* create brush image buffer if it didn't exist yet */
imbflag = (cache->use_float) ? IB_rectfloat : IB_rect;
if (!cache->ibuf) {
cache->ibuf = IMB_allocImBuf(diameter, diameter, 32, imbflag);
}
ibuf = cache->ibuf;
/* create new texture image buffer with coordinates relative to old */
oldtexibuf = cache->texibuf;
cache->texibuf = IMB_allocImBuf(diameter, diameter, 32, imbflag);
if (oldtexibuf) {
srcx = srcy = 0;
w = oldtexibuf->x;
h = oldtexibuf->y;
destx = int(floorf(tile->last_paintpos[0])) - int(floorf(pos[0])) + (diameter / 2 - w / 2);
desty = int(floorf(tile->last_paintpos[1])) - int(floorf(pos[1])) + (diameter / 2 - h / 2);
IMB_rectclip(cache->texibuf, oldtexibuf, &destx, &desty, &srcx, &srcy, &w, &h);
}
else {
srcx = srcy = 0;
destx = desty = 0;
w = h = 0;
}
x1 = min_ii(destx, ibuf->x);
y1 = min_ii(desty, ibuf->y);
x2 = min_ii(destx + w, ibuf->x);
y2 = min_ii(desty + h, ibuf->y);
/* blend existing texture in new position */
if ((x1 < x2) && (y1 < y2)) {
brush_painter_imbuf_update(painter, tile, oldtexibuf, x1, y1, x2, y2, srcx, srcy);
}
if (oldtexibuf) {
IMB_freeImBuf(oldtexibuf);
}
/* sample texture in new areas */
if ((0 < x1) && (0 < ibuf->y)) {
brush_painter_imbuf_update(painter, tile, nullptr, 0, 0, x1, ibuf->y, 0, 0);
}
if ((x2 < ibuf->x) && (0 < ibuf->y)) {
brush_painter_imbuf_update(painter, tile, nullptr, x2, 0, ibuf->x, ibuf->y, 0, 0);
}
if ((x1 < x2) && (0 < y1)) {
brush_painter_imbuf_update(painter, tile, nullptr, x1, 0, x2, y1, 0, 0);
}
if ((x1 < x2) && (y2 < ibuf->y)) {
brush_painter_imbuf_update(painter, tile, nullptr, x1, y2, x2, ibuf->y, 0, 0);
}
}
static void brush_painter_2d_tex_mapping(ImagePaintState *s,
ImagePaintTile *tile,
const int diameter,
const float pos[2],
const float mouse[2],
int mapmode,
rctf *mapping)
{
float invw = 1.0f / float(tile->canvas->x);
float invh = 1.0f / float(tile->canvas->y);
float start[2];
/* find start coordinate of brush in canvas */
start[0] = pos[0] - diameter / 2.0f;
start[1] = pos[1] - diameter / 2.0f;
if (mapmode == MTEX_MAP_MODE_STENCIL) {
/* map from view coordinates of brush to region coordinates */
float xmin, ymin, xmax, ymax;
UI_view2d_view_to_region_fl(s->v2d, start[0] * invw, start[1] * invh, &xmin, &ymin);
UI_view2d_view_to_region_fl(
s->v2d, (start[0] + diameter) * invw, (start[1] + diameter) * invh, &xmax, &ymax);
/* output mapping from brush ibuf x/y to region coordinates */
mapping->xmax = (xmax - xmin) / float(diameter);
mapping->ymax = (ymax - ymin) / float(diameter);
mapping->xmin = xmin + (tile->uv_origin[0] * tile->size[0] * mapping->xmax);
mapping->ymin = ymin + (tile->uv_origin[1] * tile->size[1] * mapping->ymax);
}
else if (mapmode == MTEX_MAP_MODE_3D) {
/* 3D mapping, just mapping to canvas 0..1. */
mapping->xmin = 2.0f * (start[0] * invw - 0.5f);
mapping->ymin = 2.0f * (start[1] * invh - 0.5f);
mapping->xmax = 2.0f * invw;
mapping->ymax = 2.0f * invh;
}
else if (ELEM(mapmode, MTEX_MAP_MODE_VIEW, MTEX_MAP_MODE_RANDOM)) {
/* view mapping */
mapping->xmin = mouse[0] - diameter * 0.5f + 0.5f;
mapping->ymin = mouse[1] - diameter * 0.5f + 0.5f;
mapping->xmax = 1.0f;
mapping->ymax = 1.0f;
}
else /* if (mapmode == MTEX_MAP_MODE_TILED) */ {
mapping->xmin = int(-diameter * 0.5) + int(floorf(pos[0])) -
int(floorf(tile->start_paintpos[0]));
mapping->ymin = int(-diameter * 0.5) + int(floorf(pos[1])) -
int(floorf(tile->start_paintpos[1]));
mapping->xmax = 1.0f;
mapping->ymax = 1.0f;
}
}
static void brush_painter_2d_refresh_cache(ImagePaintState *s,
BrushPainter *painter,
ImagePaintTile *tile,
const float pos[2],
const float mouse[2],
float pressure,
float distance,
float size)
{
const Scene *scene = painter->scene;
UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings;
Brush *brush = painter->brush;
BrushPainterCache *cache = &tile->cache;
/* Adding 4 pixels of padding for brush anti-aliasing. */
const int diameter = std::max(1, int(size * 2)) + 4;
bool do_random = false;
bool do_partial_update = false;
bool update_color = ((brush->flag & BRUSH_USE_GRADIENT) && (ELEM(brush->gradient_stroke_mode,
BRUSH_GRADIENT_SPACING_REPEAT,
BRUSH_GRADIENT_SPACING_CLAMP) ||
(cache->last_pressure != pressure)));
float tex_rotation = -brush->mtex.rot;
float mask_rotation = -brush->mask_mtex.rot;
painter->pool = BKE_image_pool_new();
/* determine how can update based on textures used */
if (cache->is_texbrush) {
if (brush->mtex.brush_map_mode == MTEX_MAP_MODE_VIEW) {
tex_rotation += ups->brush_rotation;
}
else if (brush->mtex.brush_map_mode == MTEX_MAP_MODE_RANDOM) {
do_random = true;
}
else if (!((brush->flag & BRUSH_ANCHORED) || update_color)) {
do_partial_update = true;
}
brush_painter_2d_tex_mapping(
s, tile, diameter, pos, mouse, brush->mtex.brush_map_mode, &painter->tex_mapping);
}
if (cache->is_maskbrush) {
bool renew_maxmask = false;
bool do_partial_update_mask = false;
/* invalidate case for all mapping modes */
if (brush->mask_mtex.brush_map_mode == MTEX_MAP_MODE_VIEW) {
mask_rotation += ups->brush_rotation_sec;
}
else if (brush->mask_mtex.brush_map_mode == MTEX_MAP_MODE_RANDOM) {
renew_maxmask = true;
}
else if (!(brush->flag & BRUSH_ANCHORED)) {
do_partial_update_mask = true;
renew_maxmask = true;
}
/* explicitly disable partial update even if it has been enabled above */
if (brush->mask_pressure) {
do_partial_update_mask = false;
renew_maxmask = true;
}
if (diameter != cache->lastdiameter || (mask_rotation != cache->last_mask_rotation) ||
renew_maxmask)
{
MEM_SAFE_FREE(cache->tex_mask);
brush_painter_2d_tex_mapping(
s, tile, diameter, pos, mouse, brush->mask_mtex.brush_map_mode, &painter->mask_mapping);
if (do_partial_update_mask) {
brush_painter_mask_imbuf_partial_update(painter, tile, pos, diameter);
}
else {
cache->tex_mask = brush_painter_mask_ibuf_new(painter, diameter);
}
cache->last_mask_rotation = mask_rotation;
}
}
/* Re-initialize the curve mask. Mask is always recreated due to the change of position. */
paint_curve_mask_cache_update(&cache->curve_mask_cache, brush, diameter, size, pos);
/* detect if we need to recreate image brush buffer */
if (diameter != cache->lastdiameter || (tex_rotation != cache->last_tex_rotation) || do_random ||
update_color)
{
if (cache->ibuf) {
IMB_freeImBuf(cache->ibuf);
cache->ibuf = nullptr;
}
if (do_partial_update) {
/* do partial update of texture */
brush_painter_imbuf_partial_update(painter, tile, pos, diameter);
}
else {
/* create brush from scratch */
cache->ibuf = brush_painter_imbuf_new(painter, tile, diameter, pressure, distance);
}
cache->lastdiameter = diameter;
cache->last_tex_rotation = tex_rotation;
cache->last_pressure = pressure;
}
else if (do_partial_update) {
/* do only partial update of texture */
int dx = int(floorf(tile->last_paintpos[0])) - int(floorf(pos[0]));
int dy = int(floorf(tile->last_paintpos[1])) - int(floorf(pos[1]));
if ((dx != 0) || (dy != 0)) {
brush_painter_imbuf_partial_update(painter, tile, pos, diameter);
}
}
BKE_image_pool_free(painter->pool);
painter->pool = nullptr;
}
static bool paint_2d_ensure_tile_canvas(ImagePaintState *s, int i)
{
if (i == 0) {
return true;
}
if (i >= s->num_tiles) {
return false;
}
if (s->tiles[i].state == PAINT2D_TILE_READY) {
return true;
}
if (s->tiles[i].state == PAINT2D_TILE_MISSING) {
return false;
}
s->tiles[i].cache.lastdiameter = -1;
ImBuf *ibuf = BKE_image_acquire_ibuf(s->image, &s->tiles[i].iuser, nullptr);
if (ibuf != nullptr) {
if (ibuf->channels != 4) {
s->tiles[i].state = PAINT2D_TILE_MISSING;
}
else if ((s->tiles[0].canvas->byte_buffer.data && !ibuf->byte_buffer.data) ||
(s->tiles[0].canvas->float_buffer.data && !ibuf->float_buffer.data))
{
s->tiles[i].state = PAINT2D_TILE_MISSING;
}
else {
s->tiles[i].size[0] = ibuf->x;
s->tiles[i].size[1] = ibuf->y;
s->tiles[i].radius_fac = sqrtf((float(ibuf->x) * float(ibuf->y)) /
(s->tiles[0].size[0] * s->tiles[0].size[1]));
s->tiles[i].state = PAINT2D_TILE_READY;
}
}
else {
s->tiles[i].state = PAINT2D_TILE_MISSING;
}
if (s->tiles[i].state == PAINT2D_TILE_MISSING) {
BKE_image_release_ibuf(s->image, ibuf, nullptr);
return false;
}
s->tiles[i].canvas = ibuf;
return true;
}
/* keep these functions in sync */
static void paint_2d_ibuf_rgb_get(ImBuf *ibuf, int x, int y, float r_rgb[4])
{
if (ibuf->float_buffer.data) {
const float *rrgbf = ibuf->float_buffer.data + (ibuf->x * y + x) * 4;
copy_v4_v4(r_rgb, rrgbf);
}
else {
uchar *rrgb = ibuf->byte_buffer.data + (ibuf->x * y + x) * 4;
straight_uchar_to_premul_float(r_rgb, rrgb);
}
}
static void paint_2d_ibuf_rgb_set(
ImBuf *ibuf, int x, int y, const bool is_torus, const float rgb[4])
{
if (is_torus) {
x %= ibuf->x;
if (x < 0) {
x += ibuf->x;
}
y %= ibuf->y;
if (y < 0) {
y += ibuf->y;
}
}
if (ibuf->float_buffer.data) {
float *rrgbf = ibuf->float_buffer.data + (ibuf->x * y + x) * 4;
float map_alpha = (rgb[3] == 0.0f) ? rrgbf[3] : rrgbf[3] / rgb[3];
mul_v3_v3fl(rrgbf, rgb, map_alpha);
rrgbf[3] = rgb[3];
}
else {
uchar straight[4];
uchar *rrgb = ibuf->byte_buffer.data + (ibuf->x * y + x) * 4;
premul_float_to_straight_uchar(straight, rgb);
rrgb[0] = straight[0];
rrgb[1] = straight[1];
rrgb[2] = straight[2];
rrgb[3] = straight[3];
}
}
static void paint_2d_ibuf_tile_convert(ImBuf *ibuf, int *x, int *y, short paint_tile)
{
if (paint_tile & PAINT_TILE_X) {
*x %= ibuf->x;
if (*x < 0) {
*x += ibuf->x;
}
}
if (paint_tile & PAINT_TILE_Y) {
*y %= ibuf->y;
if (*y < 0) {
*y += ibuf->y;
}
}
}
static float paint_2d_ibuf_add_if(
ImBuf *ibuf, int x, int y, float *outrgb, short paint_tile, float w)
{
float inrgb[4];
if (paint_tile) {
paint_2d_ibuf_tile_convert(ibuf, &x, &y, paint_tile);
}
/* need to also do clipping here always since tiled coordinates
* are not always within bounds */
if (x < ibuf->x && x >= 0 && y < ibuf->y && y >= 0) {
paint_2d_ibuf_rgb_get(ibuf, x, y, inrgb);
}
else {
return 0.0f;
}
mul_v4_fl(inrgb, w);
add_v4_v4(outrgb, inrgb);
return w;
}
static void paint_2d_lift_soften(ImagePaintState *s,
ImagePaintTile *tile,
ImBuf *ibuf,
ImBuf *ibufb,
const int *pos,
const short paint_tile)
{
bool sharpen = (tile->cache.invert ^ ((s->brush->flag & BRUSH_DIR_IN) != 0));
float threshold = s->brush->sharp_threshold;
int x, y, xi, yi, xo, yo, xk, yk;
float count;
int out_off[2], in_off[2], dim[2];
int diff_pos[2];
float outrgb[4];
float rgba[4];
BlurKernel *kernel = s->blurkernel;
dim[0] = ibufb->x;
dim[1] = ibufb->y;
in_off[0] = pos[0];
in_off[1] = pos[1];
out_off[0] = out_off[1] = 0;
if (!paint_tile) {
IMB_rectclip(ibuf, ibufb, &in_off[0], &in_off[1], &out_off[0], &out_off[1], &dim[0], &dim[1]);
if ((dim[0] == 0) || (dim[1] == 0)) {
return;
}
}
/* find offset inside mask buffers to sample them */
sub_v2_v2v2_int(diff_pos, out_off, in_off);
for (y = 0; y < dim[1]; y++) {
for (x = 0; x < dim[0]; x++) {
/* get input pixel */
xi = in_off[0] + x;
yi = in_off[1] + y;
count = 0.0;
if (paint_tile) {
paint_2d_ibuf_tile_convert(ibuf, &xi, &yi, paint_tile);
if (xi < ibuf->x && xi >= 0 && yi < ibuf->y && yi >= 0) {
paint_2d_ibuf_rgb_get(ibuf, xi, yi, rgba);
}
else {
zero_v4(rgba);
}
}
else {
/* coordinates have been clipped properly here, it should be safe to do this */
paint_2d_ibuf_rgb_get(ibuf, xi, yi, rgba);
}
zero_v4(outrgb);
for (yk = 0; yk < kernel->side; yk++) {
for (xk = 0; xk < kernel->side; xk++) {
count += paint_2d_ibuf_add_if(ibuf,
xi + xk - kernel->pixel_len,
yi + yk - kernel->pixel_len,
outrgb,
paint_tile,
kernel->wdata[xk + yk * kernel->side]);
}
}
if (count > 0.0f) {
mul_v4_fl(outrgb, 1.0f / float(count));
if (sharpen) {
/* subtract blurred image from normal image gives high pass filter */
sub_v3_v3v3(outrgb, rgba, outrgb);
/* Now rgba_ub contains the edge result, but this should be converted to luminance to
* avoid colored speckles appearing in final image, and also to check for threshold. */
outrgb[0] = outrgb[1] = outrgb[2] = IMB_colormanagement_get_luminance(outrgb);
if (fabsf(outrgb[0]) > threshold) {
float mask = BKE_brush_alpha_get(s->scene, s->brush);
float alpha = rgba[3];
rgba[3] = outrgb[3] = mask;
/* add to enhance edges */
blend_color_add_float(outrgb, rgba, outrgb);
outrgb[3] = alpha;
}
else {
copy_v4_v4(outrgb, rgba);
}
}
}
else {
copy_v4_v4(outrgb, rgba);
}
/* write into brush buffer */
xo = out_off[0] + x;
yo = out_off[1] + y;
paint_2d_ibuf_rgb_set(ibufb, xo, yo, false, outrgb);
}
}
}
static void paint_2d_set_region(
ImagePaintRegion *region, int destx, int desty, int srcx, int srcy, int width, int height)
{
region->destx = destx;
region->desty = desty;
region->srcx = srcx;
region->srcy = srcy;
region->width = width;
region->height = height;
}
static int paint_2d_torus_split_region(ImagePaintRegion region[4],
ImBuf *dbuf,
ImBuf *sbuf,
short paint_tile)
{
int destx = region->destx;
int desty = region->desty;
int srcx = region->srcx;
int srcy = region->srcy;
int width = region->width;
int height = region->height;
int origw, origh, w, h, tot = 0;
/* convert destination and source coordinates to be within image */
if (paint_tile & PAINT_TILE_X) {
destx = destx % dbuf->x;
if (destx < 0) {
destx += dbuf->x;
}
srcx = srcx % sbuf->x;
if (srcx < 0) {
srcx += sbuf->x;
}
}
if (paint_tile & PAINT_TILE_Y) {
desty = desty % dbuf->y;
if (desty < 0) {
desty += dbuf->y;
}
srcy = srcy % sbuf->y;
if (srcy < 0) {
srcy += sbuf->y;
}
}
/* clip width of blending area to destination imbuf, to avoid writing the
* same pixel twice */
origw = w = (width > dbuf->x) ? dbuf->x : width;
origh = h = (height > dbuf->y) ? dbuf->y : height;
/* clip within image */
IMB_rectclip(dbuf, sbuf, &destx, &desty, &srcx, &srcy, &w, &h);
paint_2d_set_region(&region[tot++], destx, desty, srcx, srcy, w, h);
/* do 3 other rects if needed */
if ((paint_tile & PAINT_TILE_X) && w < origw) {
paint_2d_set_region(
&region[tot++], (destx + w) % dbuf->x, desty, (srcx + w) % sbuf->x, srcy, origw - w, h);
}
if ((paint_tile & PAINT_TILE_Y) && h < origh) {
paint_2d_set_region(
&region[tot++], destx, (desty + h) % dbuf->y, srcx, (srcy + h) % sbuf->y, w, origh - h);
}
if ((paint_tile & PAINT_TILE_X) && (paint_tile & PAINT_TILE_Y) && (w < origw) && (h < origh)) {
paint_2d_set_region(&region[tot++],
(destx + w) % dbuf->x,
(desty + h) % dbuf->y,
(srcx + w) % sbuf->x,
(srcy + h) % sbuf->y,
origw - w,
origh - h);
}
return tot;
}
static void paint_2d_lift_smear(ImBuf *ibuf, ImBuf *ibufb, int *pos, short paint_tile)
{
ImagePaintRegion region[4];
int a, tot;
paint_2d_set_region(region, 0, 0, pos[0], pos[1], ibufb->x, ibufb->y);
tot = paint_2d_torus_split_region(region, ibufb, ibuf, paint_tile);
for (a = 0; a < tot; a++) {
IMB_rectblend(ibufb,
ibufb,
ibuf,
nullptr,
nullptr,
nullptr,
0,
region[a].destx,
region[a].desty,
region[a].destx,
region[a].desty,
region[a].srcx,
region[a].srcy,
region[a].width,
region[a].height,
IMB_BLEND_COPY,
false);
}
}
static ImBuf *paint_2d_lift_clone(ImBuf *ibuf, ImBuf *ibufb, const int *pos)
{
/* NOTE: allocImbuf returns zero'd memory, so regions outside image will
* have zero alpha, and hence not be blended onto the image */
int w = ibufb->x, h = ibufb->y, destx = 0, desty = 0, srcx = pos[0], srcy = pos[1];
ImBuf *clonebuf = IMB_allocImBuf(w, h, ibufb->planes, ibufb->flags);
IMB_rectclip(clonebuf, ibuf, &destx, &desty, &srcx, &srcy, &w, &h);
IMB_rectblend(clonebuf,
clonebuf,
ibufb,
nullptr,
nullptr,
nullptr,
0,
destx,
desty,
destx,
desty,
destx,
desty,
w,
h,
IMB_BLEND_COPY_ALPHA,
false);
IMB_rectblend(clonebuf,
clonebuf,
ibuf,
nullptr,
nullptr,
nullptr,
0,
destx,
desty,
destx,
desty,
srcx,
srcy,
w,
h,
IMB_BLEND_COPY_RGB,
false);
return clonebuf;
}
static void paint_2d_convert_brushco(ImBuf *ibufb, const float pos[2], int ipos[2])
{
ipos[0] = int(floorf(pos[0] - ibufb->x / 2));
ipos[1] = int(floorf(pos[1] - ibufb->y / 2));
}
static void paint_2d_do_making_brush(ImagePaintState *s,
ImagePaintTile *tile,
ImagePaintRegion *region,
ImBuf *frombuf,
float mask_max,
short blend,
int tilex,
int tiley,
int tilew,
int tileh)
{
ImBuf tmpbuf;
IMB_initImBuf(&tmpbuf, ED_IMAGE_UNDO_TILE_SIZE, ED_IMAGE_UNDO_TILE_SIZE, 32, 0);
PaintTileMap *undo_tiles = ED_image_paint_tile_map_get();
for (int ty = tiley; ty <= tileh; ty++) {
for (int tx = tilex; tx <= tilew; tx++) {
/* retrieve original pixels + mask from undo buffer */
ushort *mask;
int origx = region->destx - tx * ED_IMAGE_UNDO_TILE_SIZE;
int origy = region->desty - ty * ED_IMAGE_UNDO_TILE_SIZE;
if (tile->canvas->float_buffer.data) {
IMB_assign_float_buffer(
&tmpbuf,
static_cast<float *>(ED_image_paint_tile_find(
undo_tiles, s->image, tile->canvas, &tile->iuser, tx, ty, &mask, false)),
IB_DO_NOT_TAKE_OWNERSHIP);
}
else {
IMB_assign_byte_buffer(
&tmpbuf,
static_cast<uchar *>(ED_image_paint_tile_find(
undo_tiles, s->image, tile->canvas, &tile->iuser, tx, ty, &mask, false)),
IB_DO_NOT_TAKE_OWNERSHIP);
}
IMB_rectblend(tile->canvas,
&tmpbuf,
frombuf,
mask,
tile->cache.curve_mask_cache.curve_mask,
tile->cache.tex_mask,
mask_max,
region->destx,
region->desty,
origx,
origy,
region->srcx,
region->srcy,
region->width,
region->height,
IMB_BlendMode(blend),
((s->brush->flag & BRUSH_ACCUMULATE) != 0));
}
}
}
struct Paint2DForeachData {
ImagePaintState *s;
ImagePaintTile *tile;
ImagePaintRegion *region;
ImBuf *frombuf;
float mask_max;
short blend;
int tilex;
int tilew;
};
static void paint_2d_op_foreach_do(void *__restrict data_v,
const int iter,
const TaskParallelTLS *__restrict /*tls*/)
{
Paint2DForeachData *data = (Paint2DForeachData *)data_v;
paint_2d_do_making_brush(data->s,
data->tile,
data->region,
data->frombuf,
data->mask_max,
data->blend,
data->tilex,
iter,
data->tilew,
iter);
}
static int paint_2d_op(void *state,
ImagePaintTile *tile,
const float lastpos[2],
const float pos[2])
{
ImagePaintState *s = ((ImagePaintState *)state);
ImBuf *clonebuf = nullptr, *frombuf;
ImBuf *canvas = tile->canvas;
ImBuf *ibufb = tile->cache.ibuf;
ImagePaintRegion region[4];
short paint_tile = s->symmetry & (PAINT_TILE_X | PAINT_TILE_Y);
short blend = s->blend;
const float *offset = s->brush->clone.offset;
float liftpos[2];
float mask_max = BKE_brush_alpha_get(s->scene, s->brush);
int bpos[2], blastpos[2], bliftpos[2];
int a, tot;
paint_2d_convert_brushco(ibufb, pos, bpos);
/* lift from canvas */
if (s->tool == PAINT_TOOL_SOFTEN) {
paint_2d_lift_soften(s, tile, canvas, ibufb, bpos, paint_tile);
blend = IMB_BLEND_INTERPOLATE;
}
else if (s->tool == PAINT_TOOL_SMEAR) {
if (lastpos[0] == pos[0] && lastpos[1] == pos[1]) {
return 0;
}
paint_2d_convert_brushco(ibufb, lastpos, blastpos);
paint_2d_lift_smear(canvas, ibufb, blastpos, paint_tile);
blend = IMB_BLEND_INTERPOLATE;
}
else if (s->tool == PAINT_TOOL_CLONE && s->clonecanvas) {
liftpos[0] = pos[0] - offset[0] * canvas->x;
liftpos[1] = pos[1] - offset[1] * canvas->y;
paint_2d_convert_brushco(ibufb, liftpos, bliftpos);
clonebuf = paint_2d_lift_clone(s->clonecanvas, ibufb, bliftpos);
}
frombuf = (clonebuf) ? clonebuf : ibufb;
if (paint_tile) {
paint_2d_set_region(region, bpos[0], bpos[1], 0, 0, frombuf->x, frombuf->y);
tot = paint_2d_torus_split_region(region, canvas, frombuf, paint_tile);
}
else {
paint_2d_set_region(region, bpos[0], bpos[1], 0, 0, frombuf->x, frombuf->y);
tot = 1;
}
/* blend into canvas */
for (a = 0; a < tot; a++) {
ED_imapaint_dirty_region(s->image,
canvas,
&tile->iuser,
region[a].destx,
region[a].desty,
region[a].width,
region[a].height,
true);
if (s->do_masking) {
/* masking, find original pixels tiles from undo buffer to composite over */
int tilex, tiley, tilew, tileh;
imapaint_region_tiles(canvas,
region[a].destx,
region[a].desty,
region[a].width,
region[a].height,
&tilex,
&tiley,
&tilew,
&tileh);
if (tiley == tileh) {
paint_2d_do_making_brush(
s, tile, &region[a], frombuf, mask_max, blend, tilex, tiley, tilew, tileh);
}
else {
Paint2DForeachData data;
data.s = s;
data.tile = tile;
data.region = &region[a];
data.frombuf = frombuf;
data.mask_max = mask_max;
data.blend = blend;
data.tilex = tilex;
data.tilew = tilew;
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
BLI_task_parallel_range(tiley, tileh + 1, &data, paint_2d_op_foreach_do, &settings);
}
}
else {
/* no masking, composite brush directly onto canvas */
IMB_rectblend_threaded(canvas,
canvas,
frombuf,
nullptr,
tile->cache.curve_mask_cache.curve_mask,
tile->cache.tex_mask,
mask_max,
region[a].destx,
region[a].desty,
region[a].destx,
region[a].desty,
region[a].srcx,
region[a].srcy,
region[a].width,
region[a].height,
IMB_BlendMode(blend),
false);
}
}
if (clonebuf) {
IMB_freeImBuf(clonebuf);
}
return 1;
}
static int paint_2d_canvas_set(ImagePaintState *s)
{
/* set clone canvas */
if (s->tool == PAINT_TOOL_CLONE) {
Image *ima = s->brush->clone.image;
ImBuf *ibuf = BKE_image_acquire_ibuf(ima, nullptr, nullptr);
if (!ima || !ibuf || !(ibuf->byte_buffer.data || ibuf->float_buffer.data)) {
BKE_image_release_ibuf(ima, ibuf, nullptr);
return 0;
}
s->clonecanvas = ibuf;
/* temporarily add float rect for cloning */
if (s->tiles[0].canvas->float_buffer.data && !s->clonecanvas->float_buffer.data) {
IMB_float_from_rect(s->clonecanvas);
}
else if (!s->tiles[0].canvas->float_buffer.data && !s->clonecanvas->byte_buffer.data) {
IMB_rect_from_float(s->clonecanvas);
}
}
/* set masking */
s->do_masking = paint_use_opacity_masking(s->brush);
return 1;
}
static void paint_2d_canvas_free(ImagePaintState *s)
{
for (int i = 0; i < s->num_tiles; i++) {
BKE_image_release_ibuf(s->image, s->tiles[i].canvas, nullptr);
}
BKE_image_release_ibuf(s->brush->clone.image, s->clonecanvas, nullptr);
if (s->blurkernel) {
paint_delete_blur_kernel(s->blurkernel);
MEM_freeN(s->blurkernel);
}
}
static void paint_2d_transform_mouse(View2D *v2d, const float in[2], float out[2])
{
UI_view2d_region_to_view(v2d, in[0], in[1], &out[0], &out[1]);
}
static bool is_inside_tile(const int size[2], const float pos[2], const float brush[2])
{
return (pos[0] >= -brush[0]) && (pos[0] < size[0] + brush[0]) && (pos[1] >= -brush[1]) &&
(pos[1] < size[1] + brush[1]);
}
static void paint_2d_uv_to_coord(ImagePaintTile *tile, const float uv[2], float coord[2])
{
coord[0] = (uv[0] - tile->uv_origin[0]) * tile->size[0];
coord[1] = (uv[1] - tile->uv_origin[1]) * tile->size[1];
}
void paint_2d_stroke(void *ps,
const float prev_mval[2],
const float mval[2],
const bool eraser,
float pressure,
float distance,
float base_size)
{
float new_uv[2], old_uv[2];
ImagePaintState *s = static_cast<ImagePaintState *>(ps);
BrushPainter *painter = s->painter;
const bool is_data = s->tiles[0].canvas->colormanage_flag & IMB_COLORMANAGE_IS_DATA;
s->blend = s->brush->blend;
if (eraser) {
s->blend = IMB_BLEND_ERASE_ALPHA;
}
UI_view2d_region_to_view(s->v2d, mval[0], mval[1], &new_uv[0], &new_uv[1]);
UI_view2d_region_to_view(s->v2d, prev_mval[0], prev_mval[1], &old_uv[0], &old_uv[1]);
float last_uv[2], start_uv[2];
UI_view2d_region_to_view(s->v2d, 0.0f, 0.0f, &start_uv[0], &start_uv[1]);
if (painter->firsttouch) {
/* paint exactly once on first touch */
copy_v2_v2(last_uv, new_uv);
}
else {
copy_v2_v2(last_uv, old_uv);
}
const float uv_brush_size[2] = {
(s->symmetry & PAINT_TILE_X) ? FLT_MAX : base_size / s->tiles[0].size[0],
(s->symmetry & PAINT_TILE_Y) ? FLT_MAX : base_size / s->tiles[0].size[1]};
for (int i = 0; i < s->num_tiles; i++) {
ImagePaintTile *tile = &s->tiles[i];
/* First test: Project brush into UV space, clip against tile. */
const int uv_size[2] = {1, 1};
float local_new_uv[2], local_old_uv[2];
sub_v2_v2v2(local_new_uv, new_uv, tile->uv_origin);
sub_v2_v2v2(local_old_uv, old_uv, tile->uv_origin);
if (!(is_inside_tile(uv_size, local_new_uv, uv_brush_size) ||
is_inside_tile(uv_size, local_old_uv, uv_brush_size)))
{
continue;
}
/* Lazy tile loading to get size in pixels. */
if (!paint_2d_ensure_tile_canvas(s, i)) {
continue;
}
float size = base_size * tile->radius_fac;
float new_coord[2], old_coord[2];
paint_2d_uv_to_coord(tile, new_uv, new_coord);
paint_2d_uv_to_coord(tile, old_uv, old_coord);
if (painter->firsttouch) {
paint_2d_uv_to_coord(tile, start_uv, tile->start_paintpos);
}
paint_2d_uv_to_coord(tile, last_uv, tile->last_paintpos);
/* Second check in pixel coordinates. */
const float pixel_brush_size[] = {(s->symmetry & PAINT_TILE_X) ? FLT_MAX : size,
(s->symmetry & PAINT_TILE_Y) ? FLT_MAX : size};
if (!(is_inside_tile(tile->size, new_coord, pixel_brush_size) ||
is_inside_tile(tile->size, old_coord, pixel_brush_size)))
{
continue;
}
ImBuf *ibuf = tile->canvas;
/* OCIO_TODO: float buffers are now always linear, so always use color correction
* this should probably be changed when texture painting color space is supported
*/
brush_painter_2d_require_imbuf(painter->brush,
tile,
(ibuf->float_buffer.data != nullptr),
!is_data,
painter->cache_invert);
brush_painter_2d_refresh_cache(s, painter, tile, new_coord, mval, pressure, distance, size);
if (paint_2d_op(s, tile, old_coord, new_coord)) {
tile->need_redraw = true;
}
}
painter->firsttouch = false;
}
void *paint_2d_new_stroke(bContext *C, wmOperator *op, int mode)
{
Scene *scene = CTX_data_scene(C);
SpaceImage *sima = CTX_wm_space_image(C);
ToolSettings *settings = scene->toolsettings;
Brush *brush = BKE_paint_brush(&settings->imapaint.paint);
ImagePaintState *s = MEM_cnew<ImagePaintState>(__func__);
s->sima = CTX_wm_space_image(C);
s->v2d = &CTX_wm_region(C)->v2d;
s->scene = scene;
s->brush = brush;
s->tool = brush->imagepaint_tool;
s->blend = brush->blend;
s->image = s->sima->image;
s->symmetry = settings->imapaint.paint.symmetry_flags;
if (s->image == nullptr) {
MEM_freeN(s);
return nullptr;
}
if (BKE_image_has_packedfile(s->image) && s->image->rr != nullptr) {
BKE_report(op->reports, RPT_WARNING, "Packed MultiLayer files cannot be painted");
MEM_freeN(s);
return nullptr;
}
s->num_tiles = BLI_listbase_count(&s->image->tiles);
s->tiles = MEM_cnew_array<ImagePaintTile>(s->num_tiles, __func__);
for (int i = 0; i < s->num_tiles; i++) {
s->tiles[i].iuser = sima->iuser;
}
zero_v2(s->tiles[0].uv_origin);
ImBuf *ibuf = BKE_image_acquire_ibuf(s->image, &s->tiles[0].iuser, nullptr);
if (ibuf == nullptr) {
MEM_freeN(s->tiles);
MEM_freeN(s);
return nullptr;
}
if (ibuf->channels != 4) {
BKE_image_release_ibuf(s->image, ibuf, nullptr);
BKE_report(op->reports, RPT_WARNING, "Image requires 4 color channels to paint");
MEM_freeN(s->tiles);
MEM_freeN(s);
return nullptr;
}
s->tiles[0].size[0] = ibuf->x;
s->tiles[0].size[1] = ibuf->y;
s->tiles[0].radius_fac = 1.0f;
s->tiles[0].canvas = ibuf;
s->tiles[0].state = PAINT2D_TILE_READY;
/* Initialize offsets here, they're needed for the uv space clip test before lazy-loading the
* tile properly. */
int tile_idx = 0;
for (ImageTile *tile = static_cast<ImageTile *>(s->image->tiles.first); tile;
tile = tile->next, tile_idx++)
{
s->tiles[tile_idx].iuser.tile = tile->tile_number;
s->tiles[tile_idx].uv_origin[0] = ((tile->tile_number - 1001) % 10);
s->tiles[tile_idx].uv_origin[1] = ((tile->tile_number - 1001) / 10);
}
if (!paint_2d_canvas_set(s)) {
MEM_freeN(s->tiles);
MEM_freeN(s);
return nullptr;
}
if (brush->imagepaint_tool == PAINT_TOOL_SOFTEN) {
s->blurkernel = paint_new_blur_kernel(brush, false);
}
paint_brush_init_tex(s->brush);
/* create painter */
s->painter = brush_painter_2d_new(scene, s->brush, mode == BRUSH_STROKE_INVERT);
return s;
}
void paint_2d_redraw(const bContext *C, void *ps, bool final)
{
ImagePaintState *s = static_cast<ImagePaintState *>(ps);
bool had_redraw = false;
for (int i = 0; i < s->num_tiles; i++) {
if (s->tiles[i].need_redraw) {
ImBuf *ibuf = BKE_image_acquire_ibuf(s->image, &s->tiles[i].iuser, nullptr);
imapaint_image_update(s->sima, s->image, ibuf, &s->tiles[i].iuser, false);
BKE_image_release_ibuf(s->image, ibuf, nullptr);
s->tiles[i].need_redraw = false;
had_redraw = true;
}
}
if (had_redraw) {
ED_imapaint_clear_partial_redraw();
if (s->sima == nullptr || !s->sima->lock) {
ED_region_tag_redraw(CTX_wm_region(C));
}
else {
WM_event_add_notifier(C, NC_IMAGE | NA_PAINTING, s->image);
}
}
if (final) {
if (s->image && !(s->sima && s->sima->lock)) {
BKE_image_free_gputextures(s->image);
}
/* compositor listener deals with updating */
WM_event_add_notifier(C, NC_IMAGE | NA_EDITED, s->image);
DEG_id_tag_update(&s->image->id, 0);
}
}
void paint_2d_stroke_done(void *ps)
{
ImagePaintState *s = static_cast<ImagePaintState *>(ps);
paint_2d_canvas_free(s);
for (int i = 0; i < s->num_tiles; i++) {
brush_painter_cache_2d_free(&s->tiles[i].cache);
}
MEM_freeN(s->painter);
MEM_freeN(s->tiles);
paint_brush_exit_tex(s->brush);
MEM_freeN(s);
}
static void paint_2d_fill_add_pixel_byte(const int x_px,
const int y_px,
ImBuf *ibuf,
BLI_Stack *stack,
BLI_bitmap *touched,
const float color[4],
float threshold_sq)
{
size_t coordinate;
if (x_px >= ibuf->x || x_px < 0 || y_px >= ibuf->y || y_px < 0) {
return;
}
coordinate = size_t(y_px) * ibuf->x + x_px;
if (!BLI_BITMAP_TEST(touched, coordinate)) {
float color_f[4];
uchar *color_b = ibuf->byte_buffer.data + 4 * coordinate;
rgba_uchar_to_float(color_f, color_b);
straight_to_premul_v4(color_f);
if (len_squared_v4v4(color_f, color) <= threshold_sq) {
BLI_stack_push(stack, &coordinate);
}
BLI_BITMAP_SET(touched, coordinate, true);
}
}
static void paint_2d_fill_add_pixel_float(const int x_px,
const int y_px,
ImBuf *ibuf,
BLI_Stack *stack,
BLI_bitmap *touched,
const float color[4],
float threshold_sq)
{
size_t coordinate;
if (x_px >= ibuf->x || x_px < 0 || y_px >= ibuf->y || y_px < 0) {
return;
}
coordinate = size_t(y_px) * ibuf->x + x_px;
if (!BLI_BITMAP_TEST(touched, coordinate)) {
if (len_squared_v4v4(ibuf->float_buffer.data + 4 * coordinate, color) <= threshold_sq) {
BLI_stack_push(stack, &coordinate);
}
BLI_BITMAP_SET(touched, coordinate, true);
}
}
static ImageUser *paint_2d_get_tile_iuser(ImagePaintState *s, int tile_number)
{
ImageUser *iuser = &s->tiles[0].iuser;
for (int i = 0; i < s->num_tiles; i++) {
if (s->tiles[i].iuser.tile == tile_number) {
if (!paint_2d_ensure_tile_canvas(s, i)) {
return nullptr;
}
iuser = &s->tiles[i].iuser;
break;
}
}
return iuser;
}
void paint_2d_bucket_fill(const bContext *C,
const float color[3],
Brush *br,
const float mouse_init[2],
const float mouse_final[2],
void *ps)
{
SpaceImage *sima = CTX_wm_space_image(C);
Image *ima = sima->image;
ImagePaintState *s = static_cast<ImagePaintState *>(ps);
ImBuf *ibuf;
int x_px, y_px;
uint color_b;
float color_f[4];
float strength = (s && br) ? BKE_brush_alpha_get(s->scene, br) : 1.0f;
bool do_float;
if (!ima) {
return;
}
View2D *v2d = s ? s->v2d : &CTX_wm_region(C)->v2d;
float uv_origin[2];
float image_init[2];
paint_2d_transform_mouse(v2d, mouse_init, image_init);
int tile_number = BKE_image_get_tile_from_pos(ima, image_init, image_init, uv_origin);
ImageUser local_iuser, *iuser;
if (s != nullptr) {
iuser = paint_2d_get_tile_iuser(s, tile_number);
if (iuser == nullptr) {
return;
}
}
else {
iuser = &local_iuser;
BKE_imageuser_default(iuser);
iuser->tile = tile_number;
}
ibuf = BKE_image_acquire_ibuf(ima, iuser, nullptr);
if (!ibuf) {
return;
}
do_float = (ibuf->float_buffer.data != nullptr);
/* first check if our image is float. If it is not we should correct the color to
* be in gamma space. strictly speaking this is not correct, but blender does not paint
* byte images in linear space */
if (!do_float) {
linearrgb_to_srgb_uchar3((uchar *)&color_b, color);
*(((char *)&color_b) + 3) = strength * 255;
}
else {
copy_v3_v3(color_f, color);
color_f[3] = strength;
}
if (!mouse_final || !br) {
/* first case, no image UV, fill the whole image */
ED_imapaint_dirty_region(ima, ibuf, iuser, 0, 0, ibuf->x, ibuf->y, false);
if (do_float) {
for (x_px = 0; x_px < ibuf->x; x_px++) {
for (y_px = 0; y_px < ibuf->y; y_px++) {
blend_color_mix_float(ibuf->float_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
ibuf->float_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
color_f);
}
}
}
else {
for (x_px = 0; x_px < ibuf->x; x_px++) {
for (y_px = 0; y_px < ibuf->y; y_px++) {
blend_color_mix_byte(ibuf->byte_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
ibuf->byte_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
(uchar *)&color_b);
}
}
}
}
else {
/* second case, start sweeping the neighboring pixels, looking for pixels whose
* value is within the brush fill threshold from the fill color */
BLI_Stack *stack;
BLI_bitmap *touched;
size_t coordinate;
int width = ibuf->x;
int minx = ibuf->x, miny = ibuf->y, maxx = 0, maxy = 0;
float pixel_color[4];
/* We are comparing to sum of three squared values
* (assumed in range [0,1]), so need to multiply... */
float threshold_sq = br->fill_threshold * br->fill_threshold * 3;
x_px = image_init[0] * ibuf->x;
y_px = image_init[1] * ibuf->y;
if (x_px >= ibuf->x || x_px < 0 || y_px > ibuf->y || y_px < 0) {
BKE_image_release_ibuf(ima, ibuf, nullptr);
return;
}
/* change image invalidation method later */
ED_imapaint_dirty_region(ima, ibuf, iuser, 0, 0, ibuf->x, ibuf->y, false);
stack = BLI_stack_new(sizeof(size_t), __func__);
touched = BLI_BITMAP_NEW(size_t(ibuf->x) * ibuf->y, "bucket_fill_bitmap");
coordinate = (size_t(y_px) * ibuf->x + x_px);
if (do_float) {
copy_v4_v4(pixel_color, ibuf->float_buffer.data + 4 * coordinate);
}
else {
uchar *pixel_color_b = ibuf->byte_buffer.data + 4 * coordinate;
rgba_uchar_to_float(pixel_color, pixel_color_b);
straight_to_premul_v4(pixel_color);
}
BLI_stack_push(stack, &coordinate);
BLI_BITMAP_SET(touched, coordinate, true);
if (do_float) {
while (!BLI_stack_is_empty(stack)) {
BLI_stack_pop(stack, &coordinate);
IMB_blend_color_float(ibuf->float_buffer.data + 4 * (coordinate),
ibuf->float_buffer.data + 4 * (coordinate),
color_f,
IMB_BlendMode(br->blend));
/* reconstruct the coordinates here */
x_px = coordinate % width;
y_px = coordinate / width;
paint_2d_fill_add_pixel_float(
x_px - 1, y_px - 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_float(
x_px - 1, y_px, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_float(
x_px - 1, y_px + 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_float(
x_px, y_px + 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_float(
x_px, y_px - 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_float(
x_px + 1, y_px - 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_float(
x_px + 1, y_px, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_float(
x_px + 1, y_px + 1, ibuf, stack, touched, pixel_color, threshold_sq);
if (x_px > maxx) {
maxx = x_px;
}
if (x_px < minx) {
minx = x_px;
}
if (y_px > maxy) {
maxy = y_px;
}
if (x_px > miny) {
miny = y_px;
}
}
}
else {
while (!BLI_stack_is_empty(stack)) {
BLI_stack_pop(stack, &coordinate);
IMB_blend_color_byte(ibuf->byte_buffer.data + 4 * coordinate,
ibuf->byte_buffer.data + 4 * coordinate,
(uchar *)&color_b,
IMB_BlendMode(br->blend));
/* reconstruct the coordinates here */
x_px = coordinate % width;
y_px = coordinate / width;
paint_2d_fill_add_pixel_byte(
x_px - 1, y_px - 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_byte(
x_px - 1, y_px, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_byte(
x_px - 1, y_px + 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_byte(
x_px, y_px + 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_byte(
x_px, y_px - 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_byte(
x_px + 1, y_px - 1, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_byte(
x_px + 1, y_px, ibuf, stack, touched, pixel_color, threshold_sq);
paint_2d_fill_add_pixel_byte(
x_px + 1, y_px + 1, ibuf, stack, touched, pixel_color, threshold_sq);
if (x_px > maxx) {
maxx = x_px;
}
if (x_px < minx) {
minx = x_px;
}
if (y_px > maxy) {
maxy = y_px;
}
if (x_px > miny) {
miny = y_px;
}
}
}
MEM_freeN(touched);
BLI_stack_free(stack);
}
imapaint_image_update(sima, ima, ibuf, iuser, false);
ED_imapaint_clear_partial_redraw();
BKE_image_release_ibuf(ima, ibuf, nullptr);
WM_event_add_notifier(C, NC_IMAGE | NA_EDITED, ima);
}
void paint_2d_gradient_fill(
const bContext *C, Brush *br, const float mouse_init[2], const float mouse_final[2], void *ps)
{
SpaceImage *sima = CTX_wm_space_image(C);
Image *ima = sima->image;
ImagePaintState *s = static_cast<ImagePaintState *>(ps);
ImBuf *ibuf;
int x_px, y_px;
uint color_b;
float color_f[4];
float image_init[2], image_final[2];
float tangent[2];
float line_len_sq_inv, line_len;
const float brush_alpha = BKE_brush_alpha_get(s->scene, br);
bool do_float;
if (ima == nullptr) {
return;
}
float uv_origin[2];
int tile_number = BKE_image_get_tile_from_pos(ima, image_init, image_init, uv_origin);
ImageUser *iuser = paint_2d_get_tile_iuser(s, tile_number);
if (!iuser) {
return;
}
ibuf = BKE_image_acquire_ibuf(ima, iuser, nullptr);
if (ibuf == nullptr) {
return;
}
paint_2d_transform_mouse(s->v2d, mouse_final, image_final);
paint_2d_transform_mouse(s->v2d, mouse_init, image_init);
sub_v2_v2(image_init, uv_origin);
sub_v2_v2(image_final, uv_origin);
image_final[0] *= ibuf->x;
image_final[1] *= ibuf->y;
image_init[0] *= ibuf->x;
image_init[1] *= ibuf->y;
/* some math to get needed gradient variables */
sub_v2_v2v2(tangent, image_final, image_init);
line_len = len_squared_v2(tangent);
line_len_sq_inv = 1.0f / line_len;
line_len = sqrtf(line_len);
do_float = (ibuf->float_buffer.data != nullptr);
/* this will be substituted by something else when selection is available */
ED_imapaint_dirty_region(ima, ibuf, iuser, 0, 0, ibuf->x, ibuf->y, false);
if (do_float) {
for (x_px = 0; x_px < ibuf->x; x_px++) {
for (y_px = 0; y_px < ibuf->y; y_px++) {
float f;
const float p[2] = {x_px - image_init[0], y_px - image_init[1]};
switch (br->gradient_fill_mode) {
case BRUSH_GRADIENT_LINEAR: {
f = dot_v2v2(p, tangent) * line_len_sq_inv;
break;
}
case BRUSH_GRADIENT_RADIAL:
default: {
f = len_v2(p) / line_len;
break;
}
}
BKE_colorband_evaluate(br->gradient, f, color_f);
/* convert to premultiplied */
mul_v3_fl(color_f, color_f[3]);
color_f[3] *= brush_alpha;
IMB_blend_color_float(ibuf->float_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
ibuf->float_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
color_f,
IMB_BlendMode(br->blend));
}
}
}
else {
for (x_px = 0; x_px < ibuf->x; x_px++) {
for (y_px = 0; y_px < ibuf->y; y_px++) {
float f;
const float p[2] = {x_px - image_init[0], y_px - image_init[1]};
switch (br->gradient_fill_mode) {
case BRUSH_GRADIENT_LINEAR: {
f = dot_v2v2(p, tangent) * line_len_sq_inv;
break;
}
case BRUSH_GRADIENT_RADIAL:
default: {
f = len_v2(p) / line_len;
break;
}
}
BKE_colorband_evaluate(br->gradient, f, color_f);
linearrgb_to_srgb_v3_v3(color_f, color_f);
rgba_float_to_uchar((uchar *)&color_b, color_f);
((uchar *)&color_b)[3] *= brush_alpha;
IMB_blend_color_byte(ibuf->byte_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
ibuf->byte_buffer.data + 4 * (size_t(y_px) * ibuf->x + x_px),
(uchar *)&color_b,
IMB_BlendMode(br->blend));
}
}
}
imapaint_image_update(sima, ima, ibuf, iuser, false);
ED_imapaint_clear_partial_redraw();
BKE_image_release_ibuf(ima, ibuf, nullptr);
WM_event_add_notifier(C, NC_IMAGE | NA_EDITED, ima);
}
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