*/
/*
- * DOS/DJGPP device driver v1.3 for Mesa
+ * DOS/DJGPP device driver for Mesa
*
- * Copyright (C) 2002 - Borca Daniel
- * Email : dborca@yahoo.com
+ * Author: Daniel Borca
+ * Email : dborca@users.sourceforge.net
* Web : http://www.geocities.com/dborca
*
* Thanks to CrazyPyro (Neil Funk) for FakeColor
#include "internal.h"
#include "vesa.h"
#include "vga.h"
+#include "null.h"
#include "video.h"
-
static vl_driver *drv;
/* based upon mode specific data: valid entire session */
int vl_video_selector;
int vl_current_offset, vl_current_delta;
+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] = {
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[])
-{
- 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 rgba[])
-{
- return array_b[rgba[2]]*G_CNT*R_CNT
- + array_g[rgba[1]]*R_CNT
- + array_r[rgba[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[])
+static int
+v_mixrgb8fake (const unsigned char rgb[])
{
- return (rgb[0]<<16)|(rgb[1]<<8)|(rgb[2]);
+ return array_b[rgb[2]]*G_CNT*R_CNT
+ + array_g[rgb[1]]*R_CNT
+ + array_r[rgb[0]];
}
-
/* Desc: color decomposition
*
* In : pixel offset, array of integers to hold color components (R, G, B, A)
*
* Note: uses current read buffer
*/
-static void v_getrgba8fake6 (unsigned int offset, unsigned char rgba[])
-{
- 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;
-}
-static void v_getrgba8fake8 (unsigned int offset, unsigned char rgba[])
-{
- word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
- rgba[0] = c >> 16;
- rgba[1] = c >> 8;
- rgba[2] = c;
- rgba[3] = c >> 24;
-}
-#define v_getrgba8 v_getrgba8fake6
-static void v_getrgba15 (unsigned int offset, unsigned char rgba[4])
-{
- word32 c = ((word16 *)vl_current_read_buffer)[offset];
- rgba[0] = _rgb_scale_5[(c >> 10) & 0x1F];
- rgba[1] = _rgb_scale_5[(c >> 5) & 0x1F];
- rgba[2] = _rgb_scale_5[c & 0x1F];
- rgba[3] = 255;
-}
-static void v_getrgba16 (unsigned int offset, unsigned char rgba[4])
+static void
+v_getrgb8fake6 (unsigned int offset, unsigned char rgb[])
{
- word32 c = ((word16 *)vl_current_read_buffer)[offset];
- rgba[0] = _rgb_scale_5[(c >> 11) & 0x1F];
- rgba[1] = _rgb_scale_6[(c >> 5) & 0x3F];
- rgba[2] = _rgb_scale_5[c & 0x1F];
- rgba[3] = 255;
+ word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
+ 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_getrgba24 (unsigned int offset, unsigned char rgba[4])
+static void
+v_getrgb8fake8 (unsigned int offset, unsigned char rgb[])
{
- word32 c = *(word32 *)((long)vl_current_read_buffer+offset*3);
- rgba[0] = c >> 16;
- rgba[1] = c >> 8;
- rgba[2] = c;
- rgba[3] = 255;
-}
-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;
+ word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
+ 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)
+static void
+init_tab_16_8 (void)
{
- 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)
-{
- 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;
}
-
/* Desc: set one palette entry
*
* In : index, R, G, B
*
* Note: color components are in range [0.0 .. 1.0]
*/
-void vl_setCI (int index, float red, float green, float blue)
+void
+vl_setCI (int index, float red, float green, float blue)
{
- drv->setCI_f(index, red, green, blue);
+ drv->setCI_f(index, red, green, blue);
}
-
/* Desc: set one palette entry
*
* In : color, R, G, B
*
* Note: -
*/
-static void fake_setcolor (int c, int r, int g, int b)
+static void
+fake_setcolor (int c, int r, int g, int b)
{
- VGAPalette[c] = 0xff000000 | (r<<16) | (g<<8) | b;
+ VGAPalette[c] = 0xff000000 | (r<<16) | (g<<8) | b;
- drv->setCI_i(c, r, g, b);
+ drv->setCI_i(c, r, g, b);
}
-
/* Desc: build FakeColor palette
*
* In : CI precision in bits
*
* Note: -
*/
-static void fake_buildpalette (int bits)
+static void
+fake_buildpalette (int bits)
{
- double c_r, c_g, c_b;
- int r, g, b, color = 0;
-
- double max = (1 << bits) - 1;
-
- for (b=0; b<B_CNT; ++b) {
- for (g=0; g<G_CNT; ++g) {
- for (r=0; r<R_CNT; ++r) {
- c_r = 0.5 + (double)r*(max-R_BIAS)/(R_CNT-1.) + R_BIAS;
- c_g = 0.5 + (double)g*(max-G_BIAS)/(G_CNT-1.) + G_BIAS;
- c_b = 0.5 + (double)b*(max-B_BIAS)/(B_CNT-1.) + B_BIAS;
- fake_setcolor(color++, (int)c_r, (int)c_g, (int)c_b);
+ double c_r, c_g, c_b;
+ int r, g, b, color = 0;
+
+ double max = (1 << bits) - 1;
+
+ for (b = 0; b < B_CNT; ++b) {
+ for (g = 0; g < G_CNT; ++g) {
+ for (r = 0; r < R_CNT; ++r) {
+ c_r = 0.5 + (double)r * (max-R_BIAS) / (R_CNT-1.) + R_BIAS;
+ c_g = 0.5 + (double)g * (max-G_BIAS) / (G_CNT-1.) + G_BIAS;
+ c_b = 0.5 + (double)b * (max-B_BIAS) / (B_CNT-1.) + B_BIAS;
+ fake_setcolor(color++, (int)c_r, (int)c_g, (int)c_b);
}
- }
- }
-
- for (color=0; color<256; color++) {
- c_r = (double)color*R_CNT/256.;
- c_g = (double)color*G_CNT/256.;
- c_b = (double)color*B_CNT/256.;
- array_r[color] = (int)c_r;
- array_g[color] = (int)c_g;
- array_b[color] = (int)c_b;
- }
+ }
+ }
+
+ for (color = 0; color < 256; color++) {
+ c_r = (double)color * R_CNT / 256.;
+ c_g = (double)color * G_CNT / 256.;
+ c_b = (double)color * B_CNT / 256.;
+ array_r[color] = (int)c_r;
+ array_g[color] = (int)c_g;
+ array_b[color] = (int)c_b;
+ }
}
+/* Desc: initialize hardware
+ *
+ * In : -
+ * Out : list of available modes
+ *
+ * Note: when returning non-NULL, global variable `drv' is guaranteed to be ok
+ */
+static vl_mode *
+v_init_hw (void)
+{
+ static vl_mode *q = NULL;
+
+ if (q == NULL) {
+ /* are we forced to NUL driver? */
+ if (getenv("DMESA_NULDRV")) {
+ if ((q = NUL.init()) != NULL) {
+ drv = &NUL;
+ }
+ return q;
+ }
+ /* initialize hardware */
+ if ((q = VESA.init()) != NULL) {
+ drv = &VESA;
+ } else if ((q = VGA.init()) != NULL) {
+ drv = &VGA;
+ } else {
+ drv = NULL;
+ }
+ }
+
+ return q;
+}
+
/* Desc: sync buffer with video hardware
*
*
* Note: -
*/
-int vl_sync_buffer (void **buffer, int x, int y, int width, int height)
+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)) {
- return -1;
- } else {
- void *newbuf = *buffer;
-
- if ((newbuf == NULL) || (vl_current_width != width) || (vl_current_height != height)) {
- newbuf = realloc(newbuf, width * height * video_bypp);
- }
-
- if (newbuf == NULL) {
- return -2;
- }
-
- vl_current_width = width;
- vl_current_height = height;
- vl_current_stride = vl_current_width * video_bypp;
- vl_current_bytes = vl_current_stride * height;
-
- vl_current_offset = video_scanlen * y + video_bypp * x;
- vl_current_delta = video_scanlen - vl_current_stride;
-
- vl_current_draw_buffer = vl_current_read_buffer = *buffer = newbuf;
- return 0;
- }
+ if ((/*XXX*/width & 7) || (x < 0) || (y < 0) || (x+width > video_mode->xres) || (y+height > video_mode->yres)) {
+ return -1;
+ } else {
+ void *newbuf = *buffer;
+
+ if ((newbuf == NULL) || (vl_current_width != width) || (vl_current_height != height)) {
+ newbuf = realloc(newbuf, width * height * video_bypp);
+ }
+
+ if (newbuf == NULL) {
+ return -2;
+ }
+
+ vl_current_width = width;
+ vl_current_height = height;
+ vl_current_stride = vl_current_width * video_bypp;
+ vl_current_bytes = vl_current_stride * height;
+
+ vl_current_offset = video_scanlen * y + video_bypp * x;
+ vl_current_delta = video_scanlen - vl_current_stride;
+
+ vl_current_draw_buffer = vl_current_read_buffer = *buffer = newbuf;
+ return 0;
+ }
}
-
/* Desc: state retrieval
*
* In : name, storage
- * Out : -
+ * Out : -1 for an error
*
* Note: -
*/
-int vl_get (int pname, int *params)
+int
+vl_get (int pname, int *params)
{
- switch (pname) {
- case VL_GET_SCREEN_SIZE:
- params[0] = video_mode->xres;
- params[1] = video_mode->yres;
- break;
- default:
- return drv->get(pname, params);
- }
- return 0;
+ switch (pname) {
+ case VL_GET_SCREEN_SIZE:
+ params[0] = video_mode->xres;
+ params[1] = video_mode->yres;
+ break;
+ case VL_GET_VIDEO_MODES: {
+ int n;
+ vl_mode *q;
+ if ((q = v_init_hw()) == NULL) {
+ return -1;
+ }
+ /* count available visuals */
+ for (n = 0; q->mode != 0xffff; q++) {
+ if ((q + 1)->mode == (q->mode | 0x4000)) {
+ /* same mode, but linear */
+ q++;
+ }
+ if (params) {
+ params[n] = (int)q;
+ }
+ n++;
+ }
+ return n;
+ }
+ default:
+ return (drv != NULL) ? drv->get(pname, params) : -1;
+ }
+ return 0;
}
-
/* Desc: setup mode
*
* In : ptr to mode definition
*
* Note: -
*/
-static int vl_setup_mode (vl_mode *p)
+static int
+vl_setup_mode (vl_mode *p)
{
- if (p == NULL) {
- 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;
- vl_video_selector = p->sel;
-
- return 0;
+ if (p == NULL) {
+ return -1;
+ }
+
+ switch (p->bpp) {
+ case 8:
+ break;
+ case 15:
+ break;
+ case 16:
+ break;
+ case 24:
+ break;
+ case 32:
+ break;
+ default:
+ return -1;
+ }
+
+ video_mode = p;
+ video_bypp = (p->bpp+7)/8;
+ video_scanlen = p->scanlen;
+ vl_video_selector = p->sel;
+
+ return 0;
}
-
/* Desc: restore to the mode prior to first call to `vl_video_init'.
*
* In : -
*
* Note: -
*/
-void vl_video_exit (void)
+void
+vl_video_exit (void)
{
- drv->restore();
- drv->fini();
+ drv->restore();
+ drv->fini();
+ video_mode = NULL;
}
-
/* Desc: enter mode
*
* In : xres, yres, bits/pixel, RGB, refresh rate
*
* Note: -
*/
-int vl_video_init (int width, int height, int bpp, int rgb, int refresh)
+int
+vl_video_init (int width, int height, int bpp, int rgb, int refresh, int fbbits)
{
- int fake;
- vl_mode *p, *q;
- unsigned int min;
-
- fake = 0;
- if (!rgb) {
- bpp = 8;
- } else if (bpp == 8) {
- fake = 1;
- }
-
- /* initialize hardware */
- drv = &VESA;
- if ((q=drv->init()) == NULL) {
- drv = &VGA;
- if ((q=drv->init()) == NULL) {
- return 0;
- }
- }
-
- /* search for a mode that fits our request */
- for (min=-1, p=NULL; q->mode!=0xffff; q++) {
- if ((q->xres>=width) && (q->yres>=height) && (q->bpp==bpp)) {
- if (min>=(unsigned)(q->xres*q->yres)) {
- min = q->xres*q->yres;
- p = q;
- }
- }
- }
-
- /* 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;
- }
+ int fake;
+ vl_mode *p, *q;
+ unsigned int min;
+
+ fake = 0;
+ if (!rgb) {
+ bpp = 8;
+ } else if (bpp == 8) {
+ fake = 1;
+ }
+
+ /* initialize hardware */
+ if ((q = v_init_hw()) == NULL) {
+ return 0;
+ }
+
+ /* search for a mode that fits our request */
+ for (min = -1, p = NULL; q->mode != 0xffff; q++) {
+ if ((q->xres >= width) && (q->yres >= height) && (q->bpp == bpp)) {
+ if (min >= (unsigned)(q->xres * q->yres)) {
+ min = q->xres * q->yres;
+ p = q;
+ }
+ }
+ }
+
+ /* 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;
}
- return bpp;
- }
- /* abort */
- return 0;
+ /* abort */
+ return 0;
}
projects / mesa.git / blobdiff