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fix dither mask generation.. works again now.. use for icons to dnd 

SVN revision: 2426
This commit is contained in:
Carsten Haitzler 2000-04-05 01:34:05 +00:00
parent a61c7169aa
commit 9714cd42d4
1 changed files with 67 additions and 38 deletions
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105
src/rgba.c
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@ -34,6 +34,8 @@ static DATA16 *_dither_b16;
static DATA8 *_dither_r8;
static DATA8 *_dither_g8;
static DATA8 *_dither_b8;
static int dither_a_init = 0;
static DATA8 _dither_a1[8 * 8 * 256];
/*****************************************************************************/
/* Actual rendering routines */
@ -1200,15 +1202,15 @@ src++
/*****************************************************************************/
/* MACROS for dithered RGBA -> A1 conversion */
# define DITHER_RGBA_A1_LUT(num) \
(_dither_r8[(((x + num) & 0x7) << 11) | ((y & 0x7) << 8) | ((src[num] >> 24))])
(_dither_a1[(((x + num) & 0x7) << 11) | ((y & 0x7) << 8) | ((src[num] >> 24))])
#ifdef WORDS_BIGENDIAN
#define WRITE1_RGBA_A1_DITHER(src, dest) \
*dest |= (DITHER_RGBA_A1_LUT(0)) << (24 + (x & 0x7)); \
*dest |= (DITHER_RGBA_A1_LUT(0)) << (7 - (x & 0x7)); \
if ((x & 0x7) == 0x7) dest++; \
src++;
#else
#define WRITE1_RGBA_A1_DITHER(src, dest) \
*dest |= (DITHER_RGBA_A1_LUT(0)) << (31 - (x & 0x7)); \
*dest |= (DITHER_RGBA_A1_LUT(0)) << (0 + (x & 0x7)); \
if ((x & 0x7) == 0x7) dest++; \
src++;
#endif
@ -1307,6 +1309,33 @@ __imlib_RGBA_init(void *rd, void *gd, void *bd, int depth, DATA8 palette_type)
};
int i, x, y;
if (!dither_a_init)
{
for (y = 0; y < 8; y++)
{
for (x = 0; x < 8; x++)
{
for (i = 0; i < 256; i++)
{
int pi;
/*
pi = i >> 1;
if ((_dither_88[x][y]) < (pi))
_dither_a1[(x << 11) | (y << 8) | i] = 1;
else
_dither_a1[(x << 11) | (y << 8) | i] = 0;
*/
pi = (i * (256 - 128)) / 255;
if ((_dither_88[x][y] < ((pi & 0x7f) >> 1)) && (pi < (256 - 128)))
_dither_a1[(x << 11) | (y << 8) | i] = (((pi + 128) >> 7) & 0x01);
else
_dither_a1[(x << 11) | (y << 8) | i] = ((pi >> 7) & 0x01);
}
}
}
dither_a_init = 1;
}
switch (depth)
{
case 16:
@ -3227,24 +3256,24 @@ __imlib_RGBA_to_A1_fast(DATA32 *src , int src_jump,
DATA8 *dest, int dest_jump,
int width, int height, int dx, int dy)
{
int x, y, w, h;
w = width;
h = height;
memset(dest, 0, ((w + 7) >> 3 + dest_jump) * height);
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
WRITE1_RGBA_A1(src, dest);
}
src += src_jump;
dest += dest_jump;
}
return;
dx = 0;
dy = 0;
int x, y, w, h;
w = width;
h = height;
memset(dest, 0, (((w + 7) >> 3) + dest_jump) * height);
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
WRITE1_RGBA_A1(src, dest);
}
src += src_jump;
dest += dest_jump;
}
return;
dx = 0;
dy = 0;
}
void
@ -3252,24 +3281,24 @@ __imlib_RGBA_to_A1_dither(DATA32 *src , int src_jump,
DATA8 *dest, int dest_jump,
int width, int height, int dx, int dy)
{
int x, y, w, h;
w = width + dx;
h = height + dy;
int x, y, w, h;
w = width + dx;
h = height + dy;
memset(dest, 0, ((w + 7) >> 3 + dest_jump) * height);
for (y = dy; y < h; y++)
{
for (x = dx; x < w; x++)
{
WRITE1_RGBA_A1_DITHER(src, dest);
}
src += src_jump;
dest += dest_jump;
}
return;
dx = 0;
dy = 0;
memset(dest, 0, (((width + 7) >> 3) + dest_jump) * height);
for (y = dy; y < h; y++)
{
for (x = dx; x < w; x++)
{
WRITE1_RGBA_A1_DITHER(src, dest);
}
src += src_jump;
dest += dest_jump;
}
return;
dx = 0;
dy = 0;
}
void