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Differential D7863 Diff 25198 source/blender/blenlib/intern/math_color_blend_inline.c

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source/blender/blenlib/intern/math_color_blend_inline.c

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MINLINE void blend_color_dodge_byte(uchar dst[4], const uchar src1[4], const uchar src2[4]) MINLINE void blend_color_dodge_byte(uchar dst[4], const uchar src1[4], const uchar src2[4])
{ {
const int fac = src2[3]; const int fac = src2[3];
if (fac != 0) { if (fac != 0) {
const int mfac = 255 - fac; const int mfac = 255 - fac;
int i = 3; int i = 3;
while (i--) { while (i--) {
const int temp = (src2[i] == 255) ? 255 : min_ii((src1[i] * 255) / (255 - src2[i]), 255); dst[i] = (256 * src1[i]) / ((255 - src2[i] * (fac / 255)) + 1);
dst[i] = (uchar)((temp * fac + src1[i] * mfac) / 255); dst[i] = max_ii(dst[i], 255);
/*const int temp = (src2[i] == 255) ? 255 : min_ii((src1[i] * 255) / (255 - src2[i]), 255);
dst[i] = (uchar)((temp * fac + src1[i] * mfac) / 255);*/
} }
} }
else { else {
/* no op */ /* no op */
copy_v4_v4_uchar(dst, src1); copy_v4_v4_uchar(dst, src1);
} }
} }
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copy_v4_v4(dst, src1); copy_v4_v4(dst, src1);
} }
} }
MINLINE void blend_color_add_float(float dst[4], const float src1[4], const float src2[4]) MINLINE void blend_color_add_float(float dst[4], const float src1[4], const float src2[4])
{ {
if (src2[3] != 0.0f) { if (src2[3] != 0.0f) {
/* unpremul > add > premul, simplified */ /* unpremul > add > premul, simplified */
dst[0] = src1[0] + src2[0] * src1[3]; dst[0] = src1[0] + src2[0] * src1[3] * src2[3];
dst[1] = src1[1] + src2[1] * src1[3]; dst[1] = src1[1] + src2[1] * src1[3] * src2[3];
dst[2] = src1[2] + src2[2] * src1[3]; dst[2] = src1[2] + src2[2] * src1[3] * src2[3];
dst[3] = src1[3]; dst[3] = src1[3];
} }
else { else {
/* no op */ /* no op */
copy_v4_v4(dst, src1); copy_v4_v4(dst, src1);
} }
} }
MINLINE void blend_color_sub_float(float dst[4], const float src1[4], const float src2[4]) MINLINE void blend_color_sub_float(float dst[4], const float src1[4], const float src2[4])
{ {
if (src2[3] != 0.0f) { if (src2[3] != 0.0f) {
/* unpremul > subtract > premul, simplified */ /* unpremul > subtract > premul, simplified */
dst[0] = max_ff(src1[0] - src2[0] * src1[3], 0.0f); dst[0] = max_ff(src1[0] - src2[0] * src1[3] * src2[3], 0.0f);
dst[1] = max_ff(src1[1] - src2[1] * src1[3], 0.0f); dst[1] = max_ff(src1[1] - src2[1] * src1[3] * src2[3], 0.0f);
dst[2] = max_ff(src1[2] - src2[2] * src1[3], 0.0f); dst[2] = max_ff(src1[2] - src2[2] * src1[3] * src2[3], 0.0f);
dst[3] = src1[3]; dst[3] = src1[3];
} }
else { else {
/* no op */ /* no op */
copy_v4_v4(dst, src1); copy_v4_v4(dst, src1);
} }
} }
MINLINE void blend_color_mul_float(float dst[4], const float src1[4], const float src2[4]) MINLINE void blend_color_mul_float(float dst[4], const float src1[4], const float src2[4])
{ {
if (src2[3] != 0.0f) { if (src2[3] != 0.0f) {
/* unpremul > multiply > premul, simplified */ /* unpremul > multiply > premul, simplified */
const float t = src2[3]; const float t = src2[3];
const float mt = 1.0f - t; const float mt = 1.0f - t;
dst[0] = mt * src1[0] + src1[0] * src2[0] * src1[3]; dst[0] = mt * src1[0] + src1[0] * src2[0] * src1[3] * src2[3];
dst[1] = mt * src1[1] + src1[1] * src2[1] * src1[3]; dst[1] = mt * src1[1] + src1[1] * src2[1] * src1[3] * src2[3];
dst[2] = mt * src1[2] + src1[2] * src2[2] * src1[3]; dst[2] = mt * src1[2] + src1[2] * src2[2] * src1[3] * src2[3];
dst[3] = src1[3]; dst[3] = src1[3];
} }
else { else {
/* no op */ /* no op */
copy_v4_v4(dst, src1); copy_v4_v4(dst, src1);
} }
} }
MINLINE void blend_color_lighten_float(float dst[4], const float src1[4], const float src2[4]) MINLINE void blend_color_lighten_float(float dst[4], const float src1[4], const float src2[4])
{ {
if (src2[3] != 0.0f) { if (src2[3] != 0.0f) {
/* remap src2 to have same alpha as src1 premultiplied, take maximum of /* Remap src2 to have same alpha as if it was already blended with src1, take maximum of
* src1 and src2, then blend it with src1 */ * src1 and src2. */
const float t = src2[3];
const float mt = 1.0f - t; const float map_alpha = src1[3] * src2[3];
const float map_alpha = src1[3] / src2[3];
dst[0] = mt * src1[0] + t * max_ff(src1[0], src2[0] * map_alpha); dst[0] = max_ff(src1[0] * src1[3], src2[0] * map_alpha);
dst[1] = mt * src1[1] + t * max_ff(src1[1], src2[1] * map_alpha); dst[1] = max_ff(src1[1] * src1[3], src2[1] * map_alpha);
dst[2] = mt * src1[2] + t * max_ff(src1[2], src2[2] * map_alpha); dst[2] = max_ff(src1[2] * src1[3], src2[2] * map_alpha);
dst[3] = src1[3]; dst[3] = src1[3];
} }
else { else {
/* no op */ /* no op */
copy_v4_v4(dst, src1); copy_v4_v4(dst, src1);
} }
} }
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MINLINE void blend_color_dodge_float(float dst[4], const float src1[4], const float src2[4]) MINLINE void blend_color_dodge_float(float dst[4], const float src1[4], const float src2[4])
{ {
const float fac = src2[3]; const float fac = src2[3];
if (fac != 0.0f) { if (fac != 0.0f) {
const float mfac = 1.0f - fac; const float mfac = 1.0f - fac;
int i = 3; int i = 3;
while (i--) { while (i--) {
const float temp = (src2[i] >= 1.0f) ? 1.0f : min_ff(src1[i] / (1.0f - src2[i]), 1.0f); dst[i] = src1[i] / (1 - (src2[i] * fac));
dst[i] = (temp * fac + src1[i] * mfac);
} }
} }
else { else {
/* no op */ /* no op */
copy_v4_v4(dst, src1); copy_v4_v4(dst, src1);
} }
} }
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