void GaussianXBlurOperation::executePixel(float output[4], int x, int y, void *data)
{
float color_accum[4] = {0.0f, 0.0f, 0.0f, 0.0f};
float multiplier_accum = 0.0f;
MemoryBuffer *inputBuffer = (MemoryBuffer *)data;
float *buffer = inputBuffer->getBuffer();
int bufferwidth = inputBuffer->getWidth();
int bufferstartx = inputBuffer->getRect()->xmin;
int bufferstarty = inputBuffer->getRect()->ymin;
int miny = y;
int minx = x - this->m_rad;
int maxx = x + this->m_rad;
miny = max(miny, inputBuffer->getRect()->ymin);
minx = max(minx, inputBuffer->getRect()->xmin);
maxx = min(maxx, inputBuffer->getRect()->xmax - 1);
int step = getStep();
int offsetadd = getOffsetAdd();
int bufferindex = ((minx - bufferstartx) * 4) + ((miny - bufferstarty) * 4 * bufferwidth);
for (int nx = minx, index = (minx - x) + this->m_rad; nx <= maxx; nx += step, index += step) {
const float multiplier = this->m_gausstab[index];
madd_v4_v4fl(color_accum, &buffer[bufferindex], multiplier);
multiplier_accum += multiplier;
bufferindex += offsetadd;
}
mul_v4_v4fl(output, color_accum, 1.0f / multiplier_accum);
}
void GaussianYBlurOperation::executePixel(float output[4], int x, int y, void *data)
{
float color_accum[4] = {0.0f, 0.0f, 0.0f, 0.0f};
float multiplier_accum = 0.0f;
MemoryBuffer *inputBuffer = (MemoryBuffer *)data;
float *buffer = inputBuffer->getBuffer();
int bufferwidth = inputBuffer->getWidth();
int bufferstartx = inputBuffer->getRect()->xmin;
int bufferstarty = inputBuffer->getRect()->ymin;
rcti &rect = *inputBuffer->getRect();
int xmin = max_ii(x, rect.xmin);
int ymin = max_ii(y - m_filtersize, rect.ymin);
int ymax = min_ii(y + m_filtersize + 1, rect.ymax);
int index;
int step = getStep();
const int bufferIndexx = ((xmin - bufferstartx) * 4);
for (int ny = ymin; ny < ymax; ny += step) {
index = (ny - y) + this->m_filtersize;
int bufferindex = bufferIndexx + ((ny - bufferstarty) * 4 * bufferwidth);
const float multiplier = this->m_gausstab[index];
madd_v4_v4fl(color_accum, &buffer[bufferindex], multiplier);
multiplier_accum += multiplier;
}
mul_v4_v4fl(output, color_accum, 1.0f / multiplier_accum);
}
void GaussianXBlurOperation::executePixel(float output[4], int x, int y, void *data)
{
float color_accum[4] = {0.0f, 0.0f, 0.0f, 0.0f};
float multiplier_accum = 0.0f;
MemoryBuffer *inputBuffer = (MemoryBuffer *)data;
float *buffer = inputBuffer->getBuffer();
int bufferwidth = inputBuffer->getWidth();
int bufferstartx = inputBuffer->getRect()->xmin;
int bufferstarty = inputBuffer->getRect()->ymin;
rcti &rect = *inputBuffer->getRect();
int xmin = max_ii(x - m_filtersize, rect.xmin);
int xmax = min_ii(x + m_filtersize + 1, rect.xmax);
int ymin = max_ii(y, rect.ymin);
int step = getStep();
int offsetadd = getOffsetAdd();
int bufferindex = ((xmin - bufferstartx) * 4) + ((ymin - bufferstarty) * 4 * bufferwidth);
#ifdef __SSE2__
__m128 accum_r = _mm_load_ps(color_accum);
for (int nx = xmin, index = (xmin - x) + this->m_filtersize; nx < xmax; nx += step, index += step) {
__m128 reg_a = _mm_load_ps(&buffer[bufferindex]);
reg_a = _mm_mul_ps(reg_a, this->m_gausstab_sse[index]);
accum_r = _mm_add_ps(accum_r, reg_a);
multiplier_accum += this->m_gausstab[index];
bufferindex += offsetadd;
}
_mm_store_ps(color_accum, accum_r);
#else
for (int nx = xmin, index = (xmin - x) + this->m_filtersize; nx < xmax; nx += step, index += step) {
const float multiplier = this->m_gausstab[index];
madd_v4_v4fl(color_accum, &buffer[bufferindex], multiplier);
multiplier_accum += multiplier;
bufferindex += offsetadd;
}
#endif
mul_v4_v4fl(output, color_accum, 1.0f / multiplier_accum);
}
static void colorband_init_from_table_rgba_resample(
ColorBand *coba,
const float (*array)[4], const int array_len,
bool filter_samples)
{
BLI_assert(array_len >= 2);
const float eps_2x = ((1.0f / 255.0f) + 1e-6f);
struct ColorResampleElem *c, *carr = MEM_mallocN(sizeof(*carr) * array_len, __func__);
int carr_len = array_len;
c = carr;
{
const float step_size = 1.0f / (float)(array_len - 1);
for (int i = 0; i < array_len; i++, c++) {
copy_v4_v4(carr[i].rgba, array[i]);
c->next = c + 1;
c->prev = c - 1;
c->pos = i * step_size;
}
}
carr[0].prev = NULL;
carr[array_len - 1].next = NULL;
/* -2 to remove endpoints. */
Heap *heap = BLI_heap_new_ex(array_len - 2);
c = carr;
for (int i = 0; i < array_len; i++, c++) {
float cost = color_sample_remove_cost(c);
if (cost != -1.0f) {
c->node = BLI_heap_insert(heap, cost, c);
}
else {
c->node = NULL;
}
}
while ((carr_len > 1 && !BLI_heap_is_empty(heap)) &&
((carr_len >= MAXCOLORBAND) || (BLI_heap_node_value(BLI_heap_top(heap)) <= eps_2x)))
{
c = BLI_heap_pop_min(heap);
struct ColorResampleElem *c_next = c->next, *c_prev = c->prev;
c_prev->next = c_next;
c_next->prev = c_prev;
/* Clear data (not essential, avoid confusion). */
c->prev = c->next = NULL;
c->node = NULL;
/* Update adjacent */
for (int i = 0; i < 2; i++) {
struct ColorResampleElem *c_other = i ? c_next : c_prev;
if (c_other->node != NULL) {
const float cost = color_sample_remove_cost(c_other);
if (cost != -1.0) {
BLI_heap_node_value_update(heap, c_other->node, cost);
}
else {
BLI_heap_remove(heap, c_other->node);
c_other->node = NULL;
}
}
}
carr_len -= 1;
}
BLI_heap_free(heap, NULL);
/* First member is never removed. */
int i = 0;
BLI_assert(carr_len < MAXCOLORBAND);
if (filter_samples == false) {
for (c = carr; c != NULL; c = c->next, i++) {
copy_v4_v4(&coba->data[i].r, c->rgba);
coba->data[i].pos = c->pos;
coba->data[i].cur = i;
}
}
else {
for (c = carr; c != NULL; c = c->next, i++) {
const int steps_prev = c->prev ? (c - c->prev) - 1 : 0;
const int steps_next = c->next ? (c->next - c) - 1 : 0;
if (steps_prev == 0 && steps_next == 0) {
copy_v4_v4(&coba->data[i].r, c->rgba);
}
else {
float rgba[4];
float rgba_accum = 1;
copy_v4_v4(rgba, c->rgba);
if (steps_prev) {
const float step_size = 1.0 / (float)(steps_prev + 1);
int j = steps_prev;
for (struct ColorResampleElem *c_other = c - 1; c_other != c->prev; c_other--, j--) {
const float step_pos = (float)j * step_size;
BLI_assert(step_pos > 0.0f && step_pos < 1.0f);
const float f = filter_gauss(step_pos);
madd_v4_v4fl(rgba, c_other->rgba, f);
rgba_accum += f;
}
}
if (steps_next) {
const float step_size = 1.0 / (float)(steps_next + 1);
int j = steps_next;
for (struct ColorResampleElem *c_other = c + 1; c_other != c->next; c_other++, j--) {
const float step_pos = (float)j * step_size;
BLI_assert(step_pos > 0.0f && step_pos < 1.0f);
const float f = filter_gauss(step_pos);
madd_v4_v4fl(rgba, c_other->rgba, f);
rgba_accum += f;
}
}
mul_v4_v4fl(&coba->data[i].r, rgba, 1.0f / rgba_accum);
}
coba->data[i].pos = c->pos;
coba->data[i].cur = i;
}
}
BLI_assert(i == carr_len);
coba->tot = i;
coba->cur = 0;
MEM_freeN(carr);
}
void IMB_rectblend(ImBuf *dbuf, ImBuf *obuf, ImBuf *sbuf, unsigned short *dmask, unsigned short *curvemask,
unsigned short *texmask, float mask_max,
int destx, int desty, int origx, int origy, int srcx, int srcy, int width, int height,
IMB_BlendMode mode, bool accumulate)
{
unsigned int *drect = NULL, *orect = NULL, *srect = NULL, *dr, *or, *sr;
float *drectf = NULL, *orectf = NULL, *srectf = NULL, *drf, *orf, *srf;
unsigned short *cmaskrect = curvemask, *cmr;
unsigned short *dmaskrect = dmask, *dmr;
unsigned short *texmaskrect = texmask, *tmr;
int do_float, do_char, srcskip, destskip, origskip, x;
IMB_blend_func func = NULL;
IMB_blend_func_float func_float = NULL;
if (dbuf == NULL || obuf == NULL) return;
imb_rectclip3(dbuf, obuf, sbuf, &destx, &desty, &origx, &origy, &srcx, &srcy, &width, &height);
if (width == 0 || height == 0) return;
if (sbuf && sbuf->channels != 4) return;
if (dbuf->channels != 4) return;
do_char = (sbuf && sbuf->rect && dbuf->rect && obuf->rect);
do_float = (sbuf && sbuf->rect_float && dbuf->rect_float && obuf->rect_float);
if (do_char) {
drect = dbuf->rect + ((size_t)desty) * dbuf->x + destx;
orect = obuf->rect + ((size_t)origy) * obuf->x + origx;
}
if (do_float) {
drectf = dbuf->rect_float + (((size_t)desty) * dbuf->x + destx) * 4;
orectf = obuf->rect_float + (((size_t)origy) * obuf->x + origx) * 4;
}
if (dmaskrect)
dmaskrect += ((size_t)origy) * obuf->x + origx;
destskip = dbuf->x;
origskip = obuf->x;
if (sbuf) {
if (do_char) srect = sbuf->rect + ((size_t)srcy) * sbuf->x + srcx;
if (do_float) srectf = sbuf->rect_float + (((size_t)srcy) * sbuf->x + srcx) * 4;
srcskip = sbuf->x;
if (cmaskrect)
cmaskrect += ((size_t)srcy) * sbuf->x + srcx;
if (texmaskrect)
texmaskrect += ((size_t)srcy) * sbuf->x + srcx;
}
else {
srect = drect;
srectf = drectf;
srcskip = destskip;
}
if (mode == IMB_BLEND_COPY) {
/* copy */
for (; height > 0; height--) {
if (do_char) {
memcpy(drect, srect, width * sizeof(int));
drect += destskip;
srect += srcskip;
}
if (do_float) {
memcpy(drectf, srectf, width * sizeof(float) * 4);
drectf += destskip * 4;
srectf += srcskip * 4;
}
}
}
else if (mode == IMB_BLEND_COPY_RGB) {
/* copy rgb only */
for (; height > 0; height--) {
if (do_char) {
dr = drect;
sr = srect;
for (x = width; x > 0; x--, dr++, sr++) {
((char *)dr)[0] = ((char *)sr)[0];
((char *)dr)[1] = ((char *)sr)[1];
((char *)dr)[2] = ((char *)sr)[2];
}
drect += destskip;
srect += srcskip;
}
if (do_float) {
drf = drectf;
srf = srectf;
for (x = width; x > 0; x--, drf += 4, srf += 4) {
float map_alpha = (srf[3] == 0.0f) ? drf[3] : drf[3] / srf[3];
drf[0] = srf[0] * map_alpha;
drf[1] = srf[1] * map_alpha;
drf[2] = srf[2] * map_alpha;
}
drectf += destskip * 4;
srectf += srcskip * 4;
}
}
}
else if (mode == IMB_BLEND_COPY_ALPHA) {
/* copy alpha only */
for (; height > 0; height--) {
if (do_char) {
dr = drect;
sr = srect;
for (x = width; x > 0; x--, dr++, sr++)
((char *)dr)[3] = ((char *)sr)[3];
drect += destskip;
srect += srcskip;
}
if (do_float) {
drf = drectf;
srf = srectf;
for (x = width; x > 0; x--, drf += 4, srf += 4)
drf[3] = srf[3];
drectf += destskip * 4;
srectf += srcskip * 4;
}
}
}
else {
switch (mode) {
case IMB_BLEND_MIX:
case IMB_BLEND_INTERPOLATE:
func = blend_color_mix_byte;
func_float = blend_color_mix_float;
break;
case IMB_BLEND_ADD:
func = blend_color_add_byte;
func_float = blend_color_add_float;
break;
case IMB_BLEND_SUB:
func = blend_color_sub_byte;
func_float = blend_color_sub_float;
break;
case IMB_BLEND_MUL:
func = blend_color_mul_byte;
func_float = blend_color_mul_float;
break;
case IMB_BLEND_LIGHTEN:
func = blend_color_lighten_byte;
func_float = blend_color_lighten_float;
break;
case IMB_BLEND_DARKEN:
func = blend_color_darken_byte;
func_float = blend_color_darken_float;
break;
case IMB_BLEND_ERASE_ALPHA:
func = blend_color_erase_alpha_byte;
func_float = blend_color_erase_alpha_float;
break;
case IMB_BLEND_ADD_ALPHA:
func = blend_color_add_alpha_byte;
func_float = blend_color_add_alpha_float;
break;
case IMB_BLEND_OVERLAY:
func = blend_color_overlay_byte;
func_float = blend_color_overlay_float;
break;
case IMB_BLEND_HARDLIGHT:
func = blend_color_hardlight_byte;
func_float = blend_color_hardlight_float;
break;
case IMB_BLEND_COLORBURN:
func = blend_color_burn_byte;
func_float = blend_color_burn_float;
break;
case IMB_BLEND_LINEARBURN:
func = blend_color_linearburn_byte;
func_float = blend_color_linearburn_float;
break;
case IMB_BLEND_COLORDODGE:
func = blend_color_dodge_byte;
func_float = blend_color_dodge_float;
break;
case IMB_BLEND_SCREEN:
func = blend_color_screen_byte;
func_float = blend_color_screen_float;
break;
case IMB_BLEND_SOFTLIGHT:
func = blend_color_softlight_byte;
func_float = blend_color_softlight_float;
break;
case IMB_BLEND_PINLIGHT:
func = blend_color_pinlight_byte;
func_float = blend_color_pinlight_float;
break;
case IMB_BLEND_LINEARLIGHT:
func = blend_color_linearlight_byte;
func_float = blend_color_linearlight_float;
break;
case IMB_BLEND_VIVIDLIGHT:
func = blend_color_vividlight_byte;
func_float = blend_color_vividlight_float;
break;
case IMB_BLEND_DIFFERENCE:
func = blend_color_difference_byte;
func_float = blend_color_difference_float;
break;
case IMB_BLEND_EXCLUSION:
func = blend_color_exclusion_byte;
func_float = blend_color_exclusion_float;
break;
case IMB_BLEND_COLOR:
func = blend_color_color_byte;
func_float = blend_color_color_float;
break;
case IMB_BLEND_HUE:
func = blend_color_hue_byte;
func_float = blend_color_hue_float;
break;
case IMB_BLEND_SATURATION:
func = blend_color_saturation_byte;
func_float = blend_color_saturation_float;
break;
case IMB_BLEND_LUMINOSITY:
func = blend_color_luminosity_byte;
func_float = blend_color_luminosity_float;
break;
default:
break;
}
/* blend */
for (; height > 0; height--) {
if (do_char) {
dr = drect;
or = orect;
sr = srect;
if (cmaskrect) {
/* mask accumulation for painting */
cmr = cmaskrect;
tmr = texmaskrect;
/* destination mask present, do max alpha masking */
if (dmaskrect) {
dmr = dmaskrect;
for (x = width; x > 0; x--, dr++, or++, sr++, dmr++, cmr++) {
unsigned char *src = (unsigned char *)sr;
float mask_lim = mask_max * (*cmr);
if (texmaskrect)
mask_lim *= ((*tmr++) / 65535.0f);
if (src[3] && mask_lim) {
float mask;
if (accumulate)
mask = *dmr + mask_lim;
else
mask = *dmr + mask_lim - (*dmr * (*cmr / 65535.0f));
mask = min_ff(mask, 65535.0);
if (mask > *dmr) {
unsigned char mask_src[4];
*dmr = mask;
mask_src[0] = src[0];
mask_src[1] = src[1];
mask_src[2] = src[2];
if (mode == IMB_BLEND_INTERPOLATE) {
mask_src[3] = src[3];
blend_color_interpolate_byte((unsigned char *)dr, (unsigned char *)or, mask_src, mask / 65535.0f);
}
else {
mask_src[3] = divide_round_i(src[3] * mask, 65535);
func((unsigned char *)dr, (unsigned char *)or, mask_src);
}
}
}
}
dmaskrect += origskip;
}
/* no destination mask buffer, do regular blend with masktexture if present */
else {
for (x = width; x > 0; x--, dr++, or++, sr++, cmr++) {
unsigned char *src = (unsigned char *)sr;
float mask = (float)mask_max * ((float)(*cmr));
if (texmaskrect)
mask *= ((float)(*tmr++) / 65535.0f);
mask = min_ff(mask, 65535.0);
if (src[3] && (mask > 0.0f)) {
unsigned char mask_src[4];
mask_src[0] = src[0];
mask_src[1] = src[1];
mask_src[2] = src[2];
if (mode == IMB_BLEND_INTERPOLATE) {
mask_src[3] = src[3];
blend_color_interpolate_byte((unsigned char *)dr, (unsigned char *)or, mask_src, mask / 65535.0f);
}
else {
mask_src[3] = divide_round_i(src[3] * mask, 65535);
func((unsigned char *)dr, (unsigned char *)or, mask_src);
}
}
}
}
cmaskrect += srcskip;
if (texmaskrect)
texmaskrect += srcskip;
}
else {
/* regular blending */
for (x = width; x > 0; x--, dr++, or++, sr++) {
if (((unsigned char *)sr)[3])
func((unsigned char *)dr, (unsigned char *)or, (unsigned char *)sr);
}
}
drect += destskip;
orect += origskip;
srect += srcskip;
}
if (do_float) {
drf = drectf;
orf = orectf;
srf = srectf;
if (cmaskrect) {
/* mask accumulation for painting */
cmr = cmaskrect;
tmr = texmaskrect;
/* destination mask present, do max alpha masking */
if (dmaskrect) {
dmr = dmaskrect;
for (x = width; x > 0; x--, drf += 4, orf += 4, srf += 4, dmr++, cmr++) {
float mask_lim = mask_max * (*cmr);
if (texmaskrect)
mask_lim *= ((*tmr++) / 65535.0f);
if (srf[3] && mask_lim) {
float mask;
if (accumulate)
mask = min_ff(*dmr + mask_lim, 65535.0);
else
mask = *dmr + mask_lim - (*dmr * (*cmr / 65535.0f));
mask = min_ff(mask, 65535.0);
if (mask > *dmr) {
*dmr = mask;
if (mode == IMB_BLEND_INTERPOLATE) {
blend_color_interpolate_float(drf, orf, srf, mask / 65535.0f);
}
else {
float mask_srf[4];
mul_v4_v4fl(mask_srf, srf, mask / 65535.0f);
func_float(drf, orf, mask_srf);
}
}
}
}
dmaskrect += origskip;
}
/* no destination mask buffer, do regular blend with masktexture if present */
else {
for (x = width; x > 0; x--, drf += 4, orf += 4, srf += 4, cmr++) {
float mask = (float)mask_max * ((float)(*cmr));
if (texmaskrect)
mask *= ((float)(*tmr++) / 65535.0f);
mask = min_ff(mask, 65535.0);
if (srf[3] && (mask > 0.0f)) {
if (mode == IMB_BLEND_INTERPOLATE) {
blend_color_interpolate_float(drf, orf, srf, mask / 65535.0f);
}
else {
float mask_srf[4];
mul_v4_v4fl(mask_srf, srf, mask / 65535.0f);
func_float(drf, orf, mask_srf);
}
}
}
}
cmaskrect += srcskip;
if (texmaskrect)
texmaskrect += srcskip;
}
else {
/* regular blending */
for (x = width; x > 0; x--, drf += 4, orf += 4, srf += 4) {
if (srf[3] != 0)
func_float(drf, orf, srf);
}
}
drectf += destskip * 4;
orectf += origskip * 4;
srectf += srcskip * 4;
}
}
}
}
void IMB_rectblend(ImBuf *dbuf, ImBuf *obuf, ImBuf *sbuf, unsigned short *dmask,
unsigned short *smask, unsigned short mask_max,
int destx, int desty, int origx, int origy, int srcx, int srcy, int width, int height,
IMB_BlendMode mode, short lock_alpha)
{
unsigned int *drect = NULL, *orect, *srect = NULL, *dr, *or, *sr;
float *drectf = NULL, *orectf, *srectf = NULL, *drf, *orf, *srf;
unsigned short *smaskrect = smask, *smr;
unsigned short *dmaskrect = dmask, *dmr;
int do_float, do_char, srcskip, destskip, origskip, x;
IMB_blend_func func = NULL;
IMB_blend_func_float func_float = NULL;
if (dbuf == NULL || obuf == NULL) return;
imb_rectclip3(dbuf, obuf, sbuf, &destx, &desty, &origx, &origy, &srcx, &srcy, &width, &height);
if (width == 0 || height == 0) return;
if (sbuf && sbuf->channels != 4) return;
if (dbuf->channels != 4) return;
do_char = (sbuf && sbuf->rect && dbuf->rect && obuf->rect);
do_float = (sbuf && sbuf->rect_float && dbuf->rect_float && obuf->rect_float);
if (do_char) {
drect = dbuf->rect + desty * dbuf->x + destx;
orect = obuf->rect + origy * obuf->x + origx;
}
if (do_float) {
drectf = dbuf->rect_float + (desty * dbuf->x + destx) * 4;
orectf = obuf->rect_float + (origy * obuf->x + origx) * 4;
}
if (dmaskrect)
dmaskrect += origy * obuf->x + origx;
destskip = dbuf->x;
origskip = obuf->x;
if (sbuf) {
if (do_char) srect = sbuf->rect + srcy * sbuf->x + srcx;
if (do_float) srectf = sbuf->rect_float + (srcy * sbuf->x + srcx) * 4;
srcskip = sbuf->x;
if (smaskrect)
smaskrect += srcy * sbuf->x + srcx;
}
else {
srect = drect;
srectf = drectf;
srcskip = destskip;
}
if (mode == IMB_BLEND_COPY) {
/* copy */
for (; height > 0; height--) {
if (do_char) {
memcpy(drect, srect, width * sizeof(int));
drect += destskip;
srect += srcskip;
}
if (do_float) {
memcpy(drectf, srectf, width * sizeof(float) * 4);
drectf += destskip * 4;
srectf += srcskip * 4;
}
}
}
else if (mode == IMB_BLEND_COPY_RGB) {
/* copy rgb only */
for (; height > 0; height--) {
if (do_char) {
dr = drect;
sr = srect;
for (x = width; x > 0; x--, dr++, sr++) {
((char *)dr)[0] = ((char *)sr)[0];
((char *)dr)[1] = ((char *)sr)[1];
((char *)dr)[2] = ((char *)sr)[2];
}
drect += destskip;
srect += srcskip;
}
if (do_float) {
drf = drectf;
srf = srectf;
for (x = width; x > 0; x--, drf += 4, srf += 4) {
float map_alpha = (srf[3] == 0.0f)? drf[3] : drf[3] / srf[3];
drf[0] = srf[0] * map_alpha;
drf[1] = srf[1] * map_alpha;
drf[2] = srf[2] * map_alpha;
}
drectf += destskip * 4;
srectf += srcskip * 4;
}
}
}
else if (mode == IMB_BLEND_COPY_ALPHA) {
/* copy alpha only */
for (; height > 0; height--) {
if (do_char) {
dr = drect;
sr = srect;
for (x = width; x > 0; x--, dr++, sr++)
((char *)dr)[3] = ((char *)sr)[3];
drect += destskip;
srect += srcskip;
}
if (do_float) {
drf = drectf;
srf = srectf;
for (x = width; x > 0; x--, drf += 4, srf += 4)
drf[3] = srf[3];
drectf += destskip * 4;
srectf += srcskip * 4;
}
}
}
else {
switch (mode) {
case IMB_BLEND_MIX:
func = blend_color_mix_byte;
func_float = blend_color_mix_float;
break;
case IMB_BLEND_ADD:
func = blend_color_add_byte;
func_float = blend_color_add_float;
break;
case IMB_BLEND_SUB:
func = blend_color_sub_byte;
func_float = blend_color_sub_float;
break;
case IMB_BLEND_MUL:
func = blend_color_mul_byte;
func_float = blend_color_mul_float;
break;
case IMB_BLEND_LIGHTEN:
func = blend_color_lighten_byte;
func_float = blend_color_lighten_float;
break;
case IMB_BLEND_DARKEN:
func = blend_color_darken_byte;
func_float = blend_color_darken_float;
break;
case IMB_BLEND_ERASE_ALPHA:
func = blend_color_erase_alpha_byte;
func_float = blend_color_erase_alpha_float;
break;
case IMB_BLEND_ADD_ALPHA:
func = blend_color_add_alpha_byte;
func_float = blend_color_add_alpha_float;
break;
default:
break;
}
/* blend */
for (; height > 0; height--) {
if (do_char) {
dr = drect;
or = orect;
sr = srect;
if (dmaskrect && smaskrect) {
/* mask accumulation for painting */
dmr = dmaskrect;
smr = smaskrect;
for (x = width; x > 0; x--, dr++, or++, sr++, dmr++, smr++) {
unsigned char *src = (unsigned char *)sr;
if (!((lock_alpha & IMA_LAYER_LOCK_ALPHA) && (pixel_is_transparent((unsigned char *)or)))) {
if (src[3] && *smr) {
unsigned short mask = *dmr + (((mask_max - *dmr) * (*smr)) / 65535);
if (mask > *dmr) {
unsigned char mask_src[4];
*dmr = mask;
mask_src[0] = src[0];
mask_src[1] = src[1];
mask_src[2] = src[2];
mask_src[3] = divide_round_i(src[3] * mask, 65535);
func((unsigned char *)dr, (unsigned char *)or, mask_src);
}
}
}
}
dmaskrect += origskip;
smaskrect += srcskip;
}
else {
/* regular blending */
for (x = width; x > 0; x--, dr++, or++, sr++) {
if (((unsigned char *)sr)[3])
func((unsigned char *)dr, (unsigned char *)or, (unsigned char *)sr);
}
}
drect += destskip;
orect += origskip;
srect += srcskip;
}
if (do_float) {
drf = drectf;
orf = orectf;
srf = srectf;
if (dmaskrect && smaskrect) {
/* mask accumulation for painting */
dmr = dmaskrect;
smr = smaskrect;
for (x = width; x > 0; x--, drf += 4, orf += 4, srf += 4, dmr++, smr++) {
if (srf[3] != 0 && *smr) {
unsigned short mask = *dmr + (((mask_max - *dmr) * (*smr)) / 65535);
if (mask > *dmr) {
float mask_srf[4];
*dmr = mask;
mul_v4_v4fl(mask_srf, srf, mask * (1.0f / 65535.0f));
func_float(drf, orf, mask_srf);
}
}
}
dmaskrect += origskip;
smaskrect += srcskip;
}
else {
/* regular blending */
for (x = width; x > 0; x--, drf += 4, orf += 4, srf += 4) {
if (srf[3] != 0)
func_float(drf, orf, srf);
}
}
drectf += destskip * 4;
orectf += origskip * 4;
srectf += srcskip * 4;
}
}
}
}