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DOS updates (Daniel Borca)

This commit is contained in:
Brian Paul 2003-06-30 21:51:31 +00:00
parent a58214e417
commit 4e28d962ff
2 changed files with 76 additions and 1 deletions
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2
docs/README.DJ
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@ -67,7 +67,7 @@ Available options:
Tested on:
CPU: AMD Duron @800 MHz
CPU: AMD Athlon XP 1800+
Mainboard: EP-8KTA3 w/ 128 MB SDRAM
Video card: Voodoo5 5500 AGP w/ 64 MB SDRAM
DJGPP: djdev 2.04 + gcc v3.2.2 + make v3.79.1

75
src/mesa/drivers/dos/video.c
View File

@ -54,6 +54,17 @@ int vl_current_offset, vl_current_delta;
#if HUGE_LOOKUP
/* These lookup tables are used to extract RGB values in [0,255]
* from 15/16-bit pixel values.
*/
static unsigned char pix15r[0x10000];
static unsigned char pix15g[0x10000];
static unsigned char pix15b[0x10000];
static unsigned char pix16r[0x10000];
static unsigned char pix16g[0x10000];
static unsigned char pix16b[0x10000];
#else
/* lookup table for scaling 5 bit colors up to 8 bits */
static int _rgb_scale_5[32] = {
0, 8, 16, 25, 33, 41, 49, 58,
@ -61,6 +72,7 @@ static int _rgb_scale_5[32] = {
132, 140, 148, 156, 165, 173, 181, 189,
197, 206, 214, 222, 230, 239, 247, 255
};
#endif
/* lookup table for scaling 6 bit colors up to 8 bits */
static int _rgb_scale_6[64] = {
@ -213,17 +225,29 @@ static void v_getrgba8fake8 (unsigned int offset, unsigned char rgba[])
static void v_getrgba15 (unsigned int offset, unsigned char rgba[4])
{
word32 c = ((word16 *)vl_current_read_buffer)[offset];
#if HUGE_LOOKUP
rgba[0] = pix15r[c];
rgba[1] = pix15g[c];
rgba[2] = pix15b[c];
#else
rgba[0] = _rgb_scale_5[(c >> 10) & 0x1F];
rgba[1] = _rgb_scale_5[(c >> 5) & 0x1F];
rgba[2] = _rgb_scale_5[c & 0x1F];
#endif
rgba[3] = 255;
}
static void v_getrgba16 (unsigned int offset, unsigned char rgba[4])
{
word32 c = ((word16 *)vl_current_read_buffer)[offset];
#if HUGE_LOOKUP
rgba[0] = pix16r[c];
rgba[1] = pix16g[c];
rgba[2] = pix16b[c];
#else
rgba[0] = _rgb_scale_5[(c >> 11) & 0x1F];
rgba[1] = _rgb_scale_6[(c >> 5) & 0x3F];
rgba[2] = _rgb_scale_5[c & 0x1F];
#endif
rgba[3] = 255;
}
static void v_getrgba24 (unsigned int offset, unsigned char rgba[4])
@ -339,6 +363,52 @@ static void fake_buildpalette (int bits)
#if HUGE_LOOKUP
/* Desc: initialize lookup arrays
*
* In : -
* Out : -
*
* Note: -
*/
void v_init_pixeltables (void)
{
unsigned int pixel;
for (pixel = 0; pixel <= 0xffff; pixel++) {
unsigned int r, g, b;
/* 15bit */
r = (pixel & 0x7c00) >> 8;
g = (pixel & 0x03E0) >> 3;
b = (pixel & 0x001F) << 2;
r = (unsigned int)(((double)r * 255. / 0x7c) + 0.5);
g = (unsigned int)(((double)g * 255. / 0x7c) + 0.5);
b = (unsigned int)(((double)b * 255. / 0x7c) + 0.5);
pix15r[pixel] = r;
pix15g[pixel] = g;
pix15b[pixel] = b;
/* 16bit */
r = (pixel & 0xF800) >> 8;
g = (pixel & 0x07E0) >> 3;
b = (pixel & 0x001F) << 3;
r = (unsigned int)(((double)r * 255. / 0xF8) + 0.5);
g = (unsigned int)(((double)g * 255. / 0xFC) + 0.5);
b = (unsigned int)(((double)b * 255. / 0xF8) + 0.5);
pix16r[pixel] = r;
pix16g[pixel] = g;
pix16b[pixel] = b;
}
}
#endif
/* Desc: sync buffer with video hardware
*
* In : ptr to old buffer, position, size
@ -487,6 +557,11 @@ int vl_video_init (int width, int height, int bpp, int rgb, int refresh)
} else if (bpp == 8) {
fake = 1;
}
#if HUGE_LOOKUP
else if (bpp < 24) {
v_init_pixeltables();
}
#endif
/* initialize hardware */
drv = &VESA;