diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dos/video.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/mesa/drivers/dos/video.c b/src/mesa/drivers/dos/video.c index a2524e052c2..6c0f56f629d 100644 --- a/src/mesa/drivers/dos/video.c +++ b/src/mesa/drivers/dos/video.c @@ -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; |