*/
/*
- * DOS/DJGPP device driver v1.6 for Mesa
+ * DOS/DJGPP device driver for Mesa
*
- * Copyright (C) 2002 - Borca Daniel
+ * Author: Daniel Borca
* Email : dborca@users.sourceforge.net
* Web : http://www.geocities.com/dborca
*
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[0x8000];
-static unsigned char pix15g[0x8000];
-static unsigned char pix15b[0x8000];
-static unsigned char pix16r[0x10000];
-static unsigned char pix16g[0x10000];
-static unsigned char pix16b[0x10000];
-#else
+void (*vl_flip) (void);
+
+
+/* FakeColor data */
+#define R_CNT 6
+#define G_CNT 6
+#define B_CNT 6
+
+#define R_BIAS 7
+#define G_BIAS 7
+#define B_BIAS 7
+
+static word32 VGAPalette[256];
+word8 array_r[256];
+word8 array_g[256];
+word8 array_b[256];
+word8 tab_16_8[0x10000];
+
+
/* 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,
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] = {
227, 231, 235, 239, 243, 247, 251, 255
};
-/* FakeColor data */
-#define R_CNT 6
-#define G_CNT 6
-#define B_CNT 6
-
-#define R_BIAS 7
-#define G_BIAS 7
-#define B_BIAS 7
-
-static word32 VGAPalette[256];
-static word8 array_r[256];
-static word8 array_g[256];
-static word8 array_b[256];
-
-
-int (*vl_mixfix) (fixed r, fixed g, fixed b);
-int (*vl_mixrgb) (const unsigned char rgb[]);
-int (*vl_mixrgba) (const unsigned char rgba[]);
-void (*vl_getrgba) (unsigned int offset, unsigned char rgba[4]);
-int (*vl_getpixel) (unsigned int offset);
-void (*vl_clear) (int color);
-void (*vl_rect) (int x, int y, int width, int height, int color);
-void (*vl_flip) (void);
-void (*vl_putpixel) (unsigned int offset, int color);
-
-
-/* Desc: color composition (w/o ALPHA)
- *
- * In : R, G, B
- * Out : color
- *
- * Note: -
- */
-static int
-vl_mixfix8fake (fixed r, fixed g, fixed b)
-{
- return array_b[b>>FIXED_SHIFT]*G_CNT*R_CNT
- + array_g[g>>FIXED_SHIFT]*R_CNT
- + array_r[r>>FIXED_SHIFT];
-}
-#define vl_mixfix8 vl_mixfix8fake
-static int
-vl_mixfix15 (fixed r, fixed g, fixed b)
-{
- return ((r>>(3+FIXED_SHIFT))<<10)
- |((g>>(3+FIXED_SHIFT))<<5)
- | (b>>(3+FIXED_SHIFT));
-}
-static int
-vl_mixfix16 (fixed r, fixed g, fixed b)
-{
- return ((r>>(3+FIXED_SHIFT))<<11)
- |((g>>(2+FIXED_SHIFT))<<5)
- | (b>>(3+FIXED_SHIFT));
-}
-#define vl_mixfix24 vl_mixfix32
-static int
-vl_mixfix32 (fixed r, fixed g, fixed b)
-{
- return ((r>>FIXED_SHIFT)<<16)
- |((g>>FIXED_SHIFT)<<8)
- | (b>>FIXED_SHIFT);
-}
-
-
-/* Desc: color composition (w/ ALPHA)
- *
- * In : array of integers (R, G, B, A)
- * Out : color
- *
- * Note: -
- */
-#define vl_mixrgba8 vl_mixrgb8fake
-#define vl_mixrgba15 vl_mixrgb15
-#define vl_mixrgba16 vl_mixrgb16
-#define vl_mixrgba24 vl_mixrgb24
-static int
-vl_mixrgba32 (const unsigned char rgba[])
-{
- /* Hack alert:
- * currently, DMesa uses Mesa's alpha buffer;
- * so we don't really care about alpha value here...
- */
- return /*(rgba[3]<<24) | */(rgba[0]<<16) | (rgba[1]<<8) | (rgba[2]);
-}
-
/* Desc: color composition (w/o ALPHA)
*
* Note: -
*/
static int
-vl_mixrgb8fake (const unsigned char rgb[])
+v_mixrgb8fake (const unsigned char rgb[])
{
return array_b[rgb[2]]*G_CNT*R_CNT
+ array_g[rgb[1]]*R_CNT
+ array_r[rgb[0]];
}
-#define vl_mixrgb8 vl_mixrgb8fake
-static int
-vl_mixrgb15 (const unsigned char rgb[])
-{
- return ((rgb[0]>>3)<<10) | ((rgb[1]>>3)<<5) | (rgb[2]>>3);
-}
-static int
-vl_mixrgb16 (const unsigned char rgb[])
-{
- return ((rgb[0]>>3)<<11) | ((rgb[1]>>2)<<5) | (rgb[2]>>3);
-}
-#define vl_mixrgb24 vl_mixrgb32
-static int
-vl_mixrgb32 (const unsigned char rgb[])
-{
- return (rgb[0]<<16) | (rgb[1]<<8) | (rgb[2]);
-}
/* Desc: color decomposition
* Note: uses current read buffer
*/
static void
-v_getrgba8fake6 (unsigned int offset, unsigned char rgba[4])
+v_getrgb8fake6 (unsigned int offset, unsigned char rgb[])
{
word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
- rgba[0] = _rgb_scale_6[(c >> 16) & 0x3F];
- rgba[1] = _rgb_scale_6[(c >> 8) & 0x3F];
- rgba[2] = _rgb_scale_6[ c & 0x3F];
- /*rgba[3] = c >> 24;*/ /* dummy alpha; we have separate SW alpha, so ignore */
+ rgb[0] = _rgb_scale_6[(c >> 16) & 0x3F];
+ rgb[1] = _rgb_scale_6[(c >> 8) & 0x3F];
+ rgb[2] = _rgb_scale_6[ c & 0x3F];
}
static void
-v_getrgba8fake8 (unsigned int offset, unsigned char rgba[4])
+v_getrgb8fake8 (unsigned int offset, unsigned char rgb[])
{
word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
- rgba[0] = c >> 16;
- rgba[1] = c >> 8;
- rgba[2] = c;
- /*rgba[3] = c >> 24;*/ /* dummy alpha; we have separate SW alpha, so ignore */
-}
-#define v_getrgba8 v_getrgba8fake6
-static void
-v_getrgba15 (unsigned int offset, unsigned char rgba[4])
-{
- word32 c = ((word16 *)vl_current_read_buffer)[offset];
-#if HUGE_LOOKUP
- c &= 0x7fff;
- 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;*/ /* dummy alpha; we have separate SW alpha, so ignore */
-}
-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;*/ /* dummy alpha; we have separate SW alpha, so ignore */
-}
-static void
-v_getrgba24 (unsigned int offset, unsigned char rgba[4])
-{
- word32 c = *(word32 *)((long)vl_current_read_buffer+offset*3);
- rgba[0] = c >> 16;
- rgba[1] = c >> 8;
- rgba[2] = c;
- /*rgba[3] = 255;*/ /* dummy alpha; we have separate SW alpha, so ignore */
-}
-static void
-v_getrgba32 (unsigned int offset, unsigned char rgba[4])
-{
- word32 c = ((word32 *)vl_current_read_buffer)[offset];
- rgba[0] = c >> 16;
- rgba[1] = c >> 8;
- rgba[2] = c;
- /*rgba[3] = c >> 24;*/ /* dummy alpha; we have separate SW alpha, so ignore */
+ rgb[0] = c >> 16;
+ rgb[1] = c >> 8;
+ rgb[2] = c;
}
-/* Desc: pixel retrieval
+/* Desc: create R5G6B5 to FakeColor table lookup
*
- * In : pixel offset
- * Out : pixel value
+ * In : -
+ * Out : -
*
- * Note: uses current read buffer
+ * Note: -
*/
-static int
-v_getpixel8 (unsigned int offset)
-{
- return ((word8 *)vl_current_read_buffer)[offset];
-}
-#define v_getpixel15 v_getpixel16
-static int
-v_getpixel16 (unsigned int offset)
-{
- return ((word16 *)vl_current_read_buffer)[offset];
-}
-static int
-v_getpixel24 (unsigned int offset)
-{
- return *(word32 *)((long)vl_current_read_buffer+offset*3);
-}
-static int
-v_getpixel32 (unsigned int offset)
+static void
+init_tab_16_8 (void)
{
- return ((word32 *)vl_current_read_buffer)[offset];
+ int i;
+ for (i = 0; i < 0x10000; i++) {
+ unsigned char rgb[3];
+ rgb[0] = _rgb_scale_5[(i >> 11) & 0x1F];
+ rgb[1] = _rgb_scale_6[(i >> 5) & 0x3F];
+ rgb[2] = _rgb_scale_5[ i & 0x1F];
+ tab_16_8[i] = v_mixrgb8fake(rgb);
+ }
+ (void)v_getrgb8fake6;
+ (void)v_getrgb8fake8;
}
}
-#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;
-
- if (pixel <= 0x7fff) {
- /* 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: initialize hardware
*
* In : -
int
vl_sync_buffer (void **buffer, int x, int y, int width, int height)
{
- if ((width & 7) || (x < 0) || (y < 0) || (x+width > video_mode->xres) || (y+height > video_mode->yres)) {
+ if ((/*XXX*/width & 7) || (x < 0) || (y < 0) || (x+width > video_mode->xres) || (y+height > video_mode->yres)) {
return -1;
} else {
void *newbuf = *buffer;
return -1;
}
-#define INITPTR(bpp) \
- vl_putpixel = v_putpixel##bpp; \
- vl_getrgba = v_getrgba##bpp; \
- vl_getpixel = v_getpixel##bpp; \
- vl_rect = v_rect##bpp; \
- vl_mixfix = vl_mixfix##bpp; \
- vl_mixrgb = vl_mixrgb##bpp; \
- vl_mixrgba = vl_mixrgba##bpp; \
- vl_clear = _can_mmx() ? v_clear##bpp##_mmx : v_clear##bpp
-
switch (p->bpp) {
case 8:
- INITPTR(8);
break;
case 15:
- INITPTR(15);
break;
case 16:
- INITPTR(16);
break;
case 24:
- INITPTR(24);
break;
case 32:
- INITPTR(32);
break;
default:
return -1;
}
-#undef INITPTR
-
video_mode = p;
video_bypp = (p->bpp+7)/8;
video_scanlen = p->scanlen;
* Note: -
*/
int
-vl_video_init (int width, int height, int bpp, int rgb, int refresh)
+vl_video_init (int width, int height, int bpp, int rgb, int refresh, int fbbits)
{
int fake;
vl_mode *p, *q;
} else if (bpp == 8) {
fake = 1;
}
-#if HUGE_LOOKUP
- else if (bpp < 24) {
- v_init_pixeltables();
- }
-#endif
/* initialize hardware */
if ((q = v_init_hw()) == NULL) {
}
}
- /* setup and enter mode */
- if ((vl_setup_mode(p) == 0) && (drv->entermode(p, refresh) == 0)) {
- vl_flip = drv->blit;
- if (fake) {
- drv->get(VL_GET_CI_PREC, (int *)(&min));
- fake_buildpalette(min);
- if (min == 8) {
- vl_getrgba = v_getrgba8fake8;
- }
- }
- return bpp;
- }
+ /* setup and enter mode */
+ if ((vl_setup_mode(p) == 0) && (drv->entermode(p, refresh, fbbits) == 0)) {
+ vl_flip = drv->blit;
+ if (fake) {
+ drv->get(VL_GET_CI_PREC, (int *)(&min));
+ fake_buildpalette(min);
+ init_tab_16_8();
+ }
+ return bpp;
+ }
/* abort */
return 0;
projects / mesa.git / blobdiff