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blend.c - RGBA destination works -and its optimized.. just a lookup.. 

SVN revision: 2626
This commit is contained in:
Carsten Haitzler 2000-05-12 01:16:42 +00:00
parent 53a383bf4b
commit e55dc05d0b
1 changed files with 25 additions and 6 deletions
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31
src/blend.c
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@ -63,6 +63,23 @@
/* COPY OPS */
static int pow_lut_initialized = 0;
static DATA8 pow_lut[256][256];
static void
__imlib_build_pow_lut(void)
{
int i, j;
if (pow_lut_initialized) return;
pow_lut_initialized = 1;
for (i = 0; i < 256; i++)
{
for (j = 0; j < 256; j++)
pow_lut[i][j] = 255 * pow((double)i / 255, (double)j / 255);
}
}
static void
__imlib_BlendRGBAToRGB(DATA32 *src, int srcw, DATA32 *dst, int dstw,
int w, int h, ImlibColorModifier *cm)
@ -82,8 +99,8 @@ __imlib_BlendRGBAToRGBA(DATA32 *src, int srcw, DATA32 *dst, int dstw,
int w, int h, ImlibColorModifier *cm)
{
LOOP_START_3
a = 255 * pow((double)A_VAL(p1) / 255, (double)A_VAL(p2) / 255);
a = pow_lut[A_VAL(p1)][A_VAL(p2)];
BLEND_COLOR(a, R_VAL(p2), R_VAL(p1), R_VAL(p2));
BLEND_COLOR(a, G_VAL(p2), G_VAL(p1), G_VAL(p2));
@ -92,6 +109,7 @@ __imlib_BlendRGBAToRGBA(DATA32 *src, int srcw, DATA32 *dst, int dstw,
A_VAL(p2) = A_VAL(p2) + ((A_VAL(p1) * (255 - A_VAL(p2))) / 255);
LOOP_END_WITH_INCREMENT
}
static void
@ -150,7 +168,7 @@ __imlib_AddBlendRGBAToRGBA(DATA32 *src, int srcw, DATA32 *dst, int dstw,
{
LOOP_START_3
a = 255 * pow((double)A_VAL(p1) / 255, (double)A_VAL(p2) / 255);
a = pow_lut[A_VAL(p1)][A_VAL(p2)];
ADD_COLOR_WITH_ALPHA(a, R_VAL(p2), R_VAL(p1), R_VAL(p2));
ADD_COLOR_WITH_ALPHA(a, G_VAL(p2), G_VAL(p1), G_VAL(p2));
@ -225,7 +243,7 @@ __imlib_SubBlendRGBAToRGBA(DATA32 *src, int srcw, DATA32 *dst, int dstw,
{
LOOP_START_3
a = 255 * pow((double)A_VAL(p1) / 255, (double)A_VAL(p2) / 255);
a = pow_lut[A_VAL(p1)][A_VAL(p2)];
SUB_COLOR_WITH_ALPHA(a, R_VAL(p2), R_VAL(p1), R_VAL(p2));
SUB_COLOR_WITH_ALPHA(a, G_VAL(p2), G_VAL(p1), G_VAL(p2));
@ -301,7 +319,7 @@ __imlib_ReBlendRGBAToRGBA(DATA32 *src, int srcw, DATA32 *dst, int dstw,
{
LOOP_START_3
a = 255 * pow((double)A_VAL(p1) / 255, (double)A_VAL(p2) / 255);
a = pow_lut[A_VAL(p1)][A_VAL(p2)];
RESHADE_COLOR_WITH_ALPHA(a, R_VAL(p2), R_VAL(p1), R_VAL(p2));
RESHADE_COLOR_WITH_ALPHA(a, G_VAL(p2), G_VAL(p1), G_VAL(p2));
@ -983,7 +1001,8 @@ __imlib_BlendRGBAToData(DATA32 *src, int src_w, int src_h, DATA32 *dst,
h = dst_h - dy;
if ((w <= 0) || (h <= 0))
return;
__imlib_build_pow_lut();
blender = __imlib_GetBlendFunction(op, blend, merge_alpha, rgb_src, cm);
if (blender)
blender(src + (sy * src_w) + sx, src_w,