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-rw-r--r--src/mesa/drivers/dos/video.c1050
1 files changed, 525 insertions, 525 deletions
diff --git a/src/mesa/drivers/dos/video.c b/src/mesa/drivers/dos/video.c
index 297c9d5662..a2524e052c 100644
--- a/src/mesa/drivers/dos/video.c
+++ b/src/mesa/drivers/dos/video.c
@@ -1,525 +1,525 @@
-/*
- * Mesa 3-D graphics library
- * Version: 4.0
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * DOS/DJGPP device driver v1.3 for Mesa
- *
- * Copyright (C) 2002 - Borca Daniel
- * Email : dborca@yahoo.com
- * Web : http://www.geocities.com/dborca
- *
- * Thanks to CrazyPyro (Neil Funk) for FakeColor
- */
-
-
-#include <stdlib.h>
-
-#include "internal.h"
-#include "vesa.h"
-#include "vga.h"
-#include "video.h"
-
-
-
-static vl_driver *drv;
-/* based upon mode specific data: valid entire session */
-int vl_video_selector;
-static vl_mode *video_mode;
-static int video_scanlen, video_bypp;
-/* valid until next buffer */
-void *vl_current_draw_buffer, *vl_current_read_buffer;
-int vl_current_stride, vl_current_width, vl_current_height, vl_current_bytes;
-int vl_current_offset, vl_current_delta;
-
-
-
-/* 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,
- 66, 74, 82, 90, 99, 107, 115, 123,
- 132, 140, 148, 156, 165, 173, 181, 189,
- 197, 206, 214, 222, 230, 239, 247, 255
-};
-
-/* lookup table for scaling 6 bit colors up to 8 bits */
-static int _rgb_scale_6[64] = {
- 0, 4, 8, 12, 16, 20, 24, 28,
- 32, 36, 40, 45, 49, 53, 57, 61,
- 65, 69, 73, 77, 81, 85, 89, 93,
- 97, 101, 105, 109, 113, 117, 121, 125,
- 130, 134, 138, 142, 146, 150, 154, 158,
- 162, 166, 170, 174, 178, 182, 186, 190,
- 194, 198, 202, 206, 210, 215, 219, 223,
- 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)
- *
- * In : array of integers (R, G, B)
- * Out : color
- *
- * 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[])
-{
- return (rgb[0]<<16)|(rgb[1]<<8)|(rgb[2]);
-}
-
-
-
-/* Desc: color decomposition
- *
- * In : pixel offset, array of integers to hold color components (R, G, B, A)
- * Out : -
- *
- * 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])
-{
- 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;
-}
-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;
-}
-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;
-}
-
-
-
-/* Desc: pixel retrieval
- *
- * In : pixel offset
- * Out : pixel value
- *
- * Note: uses current read buffer
- */
-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)
-{
- return ((word32 *)vl_current_read_buffer)[offset];
-}
-
-
-
-/* Desc: set one palette entry
- *
- * In : index, R, G, B
- * Out : -
- *
- * Note: color components are in range [0.0 .. 1.0]
- */
-void vl_setCI (int index, float red, float green, float blue)
-{
- drv->setCI_f(index, red, green, blue);
-}
-
-
-
-/* Desc: set one palette entry
- *
- * In : color, R, G, B
- * Out : -
- *
- * Note: -
- */
-static void fake_setcolor (int c, int r, int g, int b)
-{
- VGAPalette[c] = 0xff000000 | (r<<16) | (g<<8) | b;
-
- drv->setCI_i(c, r, g, b);
-}
-
-
-
-/* Desc: build FakeColor palette
- *
- * In : CI precision in bits
- * Out : -
- *
- * Note: -
- */
-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);
- }
- }
- }
-
- 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: sync buffer with video hardware
- *
- * In : ptr to old buffer, position, size
- * Out : 0 if success
- *
- * Note: -
- */
-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;
- }
-}
-
-
-
-/* Desc: state retrieval
- *
- * In : name, storage
- * Out : -
- *
- * Note: -
- */
-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;
-}
-
-
-
-/* Desc: setup mode
- *
- * In : ptr to mode definition
- * Out : 0 if success
- *
- * Note: -
- */
-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;
-}
-
-
-
-/* Desc: restore to the mode prior to first call to `vl_video_init'.
- *
- * In : -
- * Out : -
- *
- * Note: -
- */
-void vl_video_exit (void)
-{
- drv->restore();
- drv->fini();
-}
-
-
-
-/* Desc: enter mode
- *
- * In : xres, yres, bits/pixel, RGB, refresh rate
- * Out : pixel width in bits if success
- *
- * Note: -
- */
-int vl_video_init (int width, int height, int bpp, int rgb, int refresh)
-{
- 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;
- }
- }
- return bpp;
- }
-
- /* abort */
- return 0;
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 4.0
+ *
+ * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * DOS/DJGPP device driver v1.3 for Mesa
+ *
+ * Copyright (C) 2002 - Borca Daniel
+ * Email : dborca@yahoo.com
+ * Web : http://www.geocities.com/dborca
+ *
+ * Thanks to CrazyPyro (Neil Funk) for FakeColor
+ */
+
+
+#include <stdlib.h>
+
+#include "internal.h"
+#include "vesa.h"
+#include "vga.h"
+#include "video.h"
+
+
+
+static vl_driver *drv;
+/* based upon mode specific data: valid entire session */
+int vl_video_selector;
+static vl_mode *video_mode;
+static int video_scanlen, video_bypp;
+/* valid until next buffer */
+void *vl_current_draw_buffer, *vl_current_read_buffer;
+int vl_current_stride, vl_current_width, vl_current_height, vl_current_bytes;
+int vl_current_offset, vl_current_delta;
+
+
+
+/* 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,
+ 66, 74, 82, 90, 99, 107, 115, 123,
+ 132, 140, 148, 156, 165, 173, 181, 189,
+ 197, 206, 214, 222, 230, 239, 247, 255
+};
+
+/* lookup table for scaling 6 bit colors up to 8 bits */
+static int _rgb_scale_6[64] = {
+ 0, 4, 8, 12, 16, 20, 24, 28,
+ 32, 36, 40, 45, 49, 53, 57, 61,
+ 65, 69, 73, 77, 81, 85, 89, 93,
+ 97, 101, 105, 109, 113, 117, 121, 125,
+ 130, 134, 138, 142, 146, 150, 154, 158,
+ 162, 166, 170, 174, 178, 182, 186, 190,
+ 194, 198, 202, 206, 210, 215, 219, 223,
+ 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)
+ *
+ * In : array of integers (R, G, B)
+ * Out : color
+ *
+ * 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[])
+{
+ return (rgb[0]<<16)|(rgb[1]<<8)|(rgb[2]);
+}
+
+
+
+/* Desc: color decomposition
+ *
+ * In : pixel offset, array of integers to hold color components (R, G, B, A)
+ * Out : -
+ *
+ * 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])
+{
+ 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;
+}
+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;
+}
+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;
+}
+
+
+
+/* Desc: pixel retrieval
+ *
+ * In : pixel offset
+ * Out : pixel value
+ *
+ * Note: uses current read buffer
+ */
+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)
+{
+ return ((word32 *)vl_current_read_buffer)[offset];
+}
+
+
+
+/* Desc: set one palette entry
+ *
+ * In : index, R, G, B
+ * Out : -
+ *
+ * Note: color components are in range [0.0 .. 1.0]
+ */
+void vl_setCI (int index, float red, float green, float blue)
+{
+ drv->setCI_f(index, red, green, blue);
+}
+
+
+
+/* Desc: set one palette entry
+ *
+ * In : color, R, G, B
+ * Out : -
+ *
+ * Note: -
+ */
+static void fake_setcolor (int c, int r, int g, int b)
+{
+ VGAPalette[c] = 0xff000000 | (r<<16) | (g<<8) | b;
+
+ drv->setCI_i(c, r, g, b);
+}
+
+
+
+/* Desc: build FakeColor palette
+ *
+ * In : CI precision in bits
+ * Out : -
+ *
+ * Note: -
+ */
+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);
+ }
+ }
+ }
+
+ 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: sync buffer with video hardware
+ *
+ * In : ptr to old buffer, position, size
+ * Out : 0 if success
+ *
+ * Note: -
+ */
+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;
+ }
+}
+
+
+
+/* Desc: state retrieval
+ *
+ * In : name, storage
+ * Out : -
+ *
+ * Note: -
+ */
+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;
+}
+
+
+
+/* Desc: setup mode
+ *
+ * In : ptr to mode definition
+ * Out : 0 if success
+ *
+ * Note: -
+ */
+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;
+}
+
+
+
+/* Desc: restore to the mode prior to first call to `vl_video_init'.
+ *
+ * In : -
+ * Out : -
+ *
+ * Note: -
+ */
+void vl_video_exit (void)
+{
+ drv->restore();
+ drv->fini();
+}
+
+
+
+/* Desc: enter mode
+ *
+ * In : xres, yres, bits/pixel, RGB, refresh rate
+ * Out : pixel width in bits if success
+ *
+ * Note: -
+ */
+int vl_video_init (int width, int height, int bpp, int rgb, int refresh)
+{
+ 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;
+ }
+ }
+ return bpp;
+ }
+
+ /* abort */
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-14 00:55:07 +0000