-/*\r
- * Mesa 3-D graphics library\r
- * Version: 4.0\r
- * \r
- * Copyright (C) 1999 Brian Paul All Rights Reserved.\r
- * \r
- * Permission is hereby granted, free of charge, to any person obtaining a\r
- * copy of this software and associated documentation files (the "Software"),\r
- * to deal in the Software without restriction, including without limitation\r
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,\r
- * and/or sell copies of the Software, and to permit persons to whom the\r
- * Software is furnished to do so, subject to the following conditions:\r
- * \r
- * The above copyright notice and this permission notice shall be included\r
- * in all copies or substantial portions of the Software.\r
- * \r
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS\r
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN\r
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
- */\r
-\r
-/*\r
- * DOS/DJGPP device driver v1.3 for Mesa 5.0\r
- *\r
- * Copyright (C) 2002 - Borca Daniel\r
- * Email : dborca@yahoo.com\r
- * Web : http://www.geocities.com/dborca\r
- *\r
- * Thanks to CrazyPyro (Neil Funk) for FakeColor\r
- */\r
-\r
-\r
-#include <stdlib.h>\r
-\r
-#include "internal.h"\r
-#include "vesa.h"\r
-#include "vga.h"\r
-#include "video.h"\r
-\r
-\r
-\r
-static vl_driver *drv;\r
-/* based upon mode specific data: valid entire session */\r
-int vl_video_selector;\r
-static vl_mode *video_mode;\r
-static int video_scanlen, video_bypp;\r
-/* valid until next buffer */\r
-void *vl_current_draw_buffer, *vl_current_read_buffer;\r
-int vl_current_stride, vl_current_width, vl_current_height, vl_current_bytes;\r
-int vl_current_offset, vl_current_delta;\r
-\r
-\r
-\r
-/* lookup table for scaling 5 bit colors up to 8 bits */\r
-static int _rgb_scale_5[32] = {\r
- 0, 8, 16, 25, 33, 41, 49, 58,\r
- 66, 74, 82, 90, 99, 107, 115, 123,\r
- 132, 140, 148, 156, 165, 173, 181, 189,\r
- 197, 206, 214, 222, 230, 239, 247, 255\r
-};\r
-\r
-/* lookup table for scaling 6 bit colors up to 8 bits */\r
-static int _rgb_scale_6[64] = {\r
- 0, 4, 8, 12, 16, 20, 24, 28,\r
- 32, 36, 40, 45, 49, 53, 57, 61,\r
- 65, 69, 73, 77, 81, 85, 89, 93,\r
- 97, 101, 105, 109, 113, 117, 121, 125,\r
- 130, 134, 138, 142, 146, 150, 154, 158,\r
- 162, 166, 170, 174, 178, 182, 186, 190,\r
- 194, 198, 202, 206, 210, 215, 219, 223,\r
- 227, 231, 235, 239, 243, 247, 251, 255\r
-};\r
-\r
-/* FakeColor data */\r
-#define R_CNT 6\r
-#define G_CNT 6\r
-#define B_CNT 6\r
-\r
-#define R_BIAS 7\r
-#define G_BIAS 7\r
-#define B_BIAS 7\r
-\r
-static word32 VGAPalette[256];\r
-static word8 array_r[256];\r
-static word8 array_g[256];\r
-static word8 array_b[256];\r
-\r
-\r
-\r
-int (*vl_mixfix) (fixed r, fixed g, fixed b);\r
-int (*vl_mixrgb) (const unsigned char rgb[]);\r
-int (*vl_mixrgba) (const unsigned char rgba[]);\r
-void (*vl_getrgba) (unsigned int offset, unsigned char rgba[4]);\r
-int (*vl_getpixel) (unsigned int offset);\r
-void (*vl_clear) (int color);\r
-void (*vl_rect) (int x, int y, int width, int height, int color);\r
-void (*vl_flip) (void);\r
-void (*vl_putpixel) (unsigned int offset, int color);\r
-\r
-\r
-\r
-/* Desc: color composition (w/o ALPHA)\r
- *\r
- * In : R, G, B\r
- * Out : color\r
- *\r
- * Note: -\r
- */\r
-static int vl_mixfix8fake (fixed r, fixed g, fixed b)\r
-{\r
- return array_b[b>>FIXED_SHIFT]*G_CNT*R_CNT\r
- + array_g[g>>FIXED_SHIFT]*R_CNT\r
- + array_r[r>>FIXED_SHIFT];\r
-}\r
-#define vl_mixfix8 vl_mixfix8fake\r
-static int vl_mixfix15 (fixed r, fixed g, fixed b)\r
-{\r
- return ((r>>(3+FIXED_SHIFT))<<10)\r
- |((g>>(3+FIXED_SHIFT))<<5)\r
- |(b>>(3+FIXED_SHIFT));\r
-}\r
-static int vl_mixfix16 (fixed r, fixed g, fixed b)\r
-{\r
- return ((r>>(3+FIXED_SHIFT))<<11)\r
- |((g>>(2+FIXED_SHIFT))<<5)\r
- |(b>>(3+FIXED_SHIFT));\r
-}\r
-#define vl_mixfix24 vl_mixfix32\r
-static int vl_mixfix32 (fixed r, fixed g, fixed b)\r
-{\r
- return ((r>>FIXED_SHIFT)<<16)\r
- |((g>>FIXED_SHIFT)<<8)\r
- |(b>>FIXED_SHIFT);\r
-}\r
-\r
-\r
-\r
-/* Desc: color composition (w/ ALPHA)\r
- *\r
- * In : array of integers (R, G, B, A)\r
- * Out : color\r
- *\r
- * Note: -\r
- */\r
-#define vl_mixrgba8 vl_mixrgb8fake\r
-#define vl_mixrgba15 vl_mixrgb15\r
-#define vl_mixrgba16 vl_mixrgb16\r
-#define vl_mixrgba24 vl_mixrgb24\r
-static int vl_mixrgba32 (const unsigned char rgba[])\r
-{\r
- return (rgba[3]<<24)|(rgba[0]<<16)|(rgba[1]<<8)|(rgba[2]);\r
-}\r
-\r
-\r
-\r
-/* Desc: color composition (w/o ALPHA)\r
- *\r
- * In : array of integers (R, G, B)\r
- * Out : color\r
- *\r
- * Note: -\r
- */\r
-static int vl_mixrgb8fake (const unsigned char rgba[])\r
-{\r
- return array_b[rgba[2]]*G_CNT*R_CNT\r
- + array_g[rgba[1]]*R_CNT\r
- + array_r[rgba[0]];\r
-}\r
-#define vl_mixrgb8 vl_mixrgb8fake\r
-static int vl_mixrgb15 (const unsigned char rgb[])\r
-{\r
- return ((rgb[0]>>3)<<10)|((rgb[1]>>3)<<5)|(rgb[2]>>3);\r
-}\r
-static int vl_mixrgb16 (const unsigned char rgb[])\r
-{\r
- return ((rgb[0]>>3)<<11)|((rgb[1]>>2)<<5)|(rgb[2]>>3);\r
-}\r
-#define vl_mixrgb24 vl_mixrgb32\r
-static int vl_mixrgb32 (const unsigned char rgb[])\r
-{\r
- return (rgb[0]<<16)|(rgb[1]<<8)|(rgb[2]);\r
-}\r
-\r
-\r
-\r
-/* Desc: color decomposition\r
- *\r
- * In : pixel offset, array of integers to hold color components (R, G, B, A)\r
- * Out : -\r
- *\r
- * Note: uses current read buffer\r
- */\r
-static void v_getrgba8fake6 (unsigned int offset, unsigned char rgba[])\r
-{\r
- word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];\r
- rgba[0] = _rgb_scale_6[(c >> 16) & 0x3F];\r
- rgba[1] = _rgb_scale_6[(c >> 8) & 0x3F];\r
- rgba[2] = _rgb_scale_6[c & 0x3F];\r
- rgba[3] = c >> 24;\r
-}\r
-static void v_getrgba8fake8 (unsigned int offset, unsigned char rgba[])\r
-{\r
- word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];\r
- rgba[0] = c >> 16;\r
- rgba[1] = c >> 8;\r
- rgba[2] = c;\r
- rgba[3] = c >> 24;\r
-}\r
-#define v_getrgba8 v_getrgba8fake6\r
-static void v_getrgba15 (unsigned int offset, unsigned char rgba[4])\r
-{\r
- word32 c = ((word16 *)vl_current_read_buffer)[offset];\r
- rgba[0] = _rgb_scale_5[(c >> 10) & 0x1F];\r
- rgba[1] = _rgb_scale_5[(c >> 5) & 0x1F];\r
- rgba[2] = _rgb_scale_5[c & 0x1F];\r
- rgba[3] = 255;\r
-}\r
-static void v_getrgba16 (unsigned int offset, unsigned char rgba[4])\r
-{\r
- word32 c = ((word16 *)vl_current_read_buffer)[offset];\r
- rgba[0] = _rgb_scale_5[(c >> 11) & 0x1F];\r
- rgba[1] = _rgb_scale_6[(c >> 5) & 0x3F];\r
- rgba[2] = _rgb_scale_5[c & 0x1F];\r
- rgba[3] = 255;\r
-}\r
-static void v_getrgba24 (unsigned int offset, unsigned char rgba[4])\r
-{\r
- word32 c = *(word32 *)((long)vl_current_read_buffer+offset*3);\r
- rgba[0] = c >> 16;\r
- rgba[1] = c >> 8;\r
- rgba[2] = c;\r
- rgba[3] = 255;\r
-}\r
-static void v_getrgba32 (unsigned int offset, unsigned char rgba[4])\r
-{\r
- word32 c = ((word32 *)vl_current_read_buffer)[offset];\r
- rgba[0] = c >> 16;\r
- rgba[1] = c >> 8;\r
- rgba[2] = c; \r
- rgba[3] = c >> 24;\r
-}\r
-\r
-\r
-\r
-/* Desc: pixel retrieval\r
- *\r
- * In : pixel offset\r
- * Out : pixel value\r
- *\r
- * Note: uses current read buffer\r
- */\r
-static int v_getpixel8 (unsigned int offset)\r
-{\r
- return ((word8 *)vl_current_read_buffer)[offset];\r
-}\r
-#define v_getpixel15 v_getpixel16\r
-static int v_getpixel16 (unsigned int offset)\r
-{\r
- return ((word16 *)vl_current_read_buffer)[offset];\r
-}\r
-static int v_getpixel24 (unsigned int offset)\r
-{\r
- return *(word32 *)((long)vl_current_read_buffer+offset*3);\r
-}\r
-static int v_getpixel32 (unsigned int offset)\r
-{\r
- return ((word32 *)vl_current_read_buffer)[offset];\r
-}\r
-\r
-\r
-\r
-/* Desc: set one palette entry\r
- *\r
- * In : index, R, G, B\r
- * Out : -\r
- *\r
- * Note: color components are in range [0.0 .. 1.0]\r
- */\r
-void vl_setCI (int index, float red, float green, float blue)\r
-{\r
- drv->setCI_f(index, red, green, blue);\r
-}\r
-\r
-\r
-\r
-/* Desc: set one palette entry\r
- *\r
- * In : color, R, G, B\r
- * Out : -\r
- *\r
- * Note: -\r
- */\r
-static void fake_setcolor (int c, int r, int g, int b)\r
-{\r
- VGAPalette[c] = 0xff000000 | (r<<16) | (g<<8) | b;\r
-\r
- drv->setCI_i(c, r, g, b);\r
-}\r
-\r
-\r
-\r
-/* Desc: build FakeColor palette\r
- *\r
- * In : CI precision in bits\r
- * Out : -\r
- *\r
- * Note: -\r
- */\r
-static void fake_buildpalette (int bits)\r
-{\r
- double c_r, c_g, c_b;\r
- int r, g, b, color = 0;\r
-\r
- double max = (1 << bits) - 1;\r
-\r
- for (b=0; b<B_CNT; ++b) {\r
- for (g=0; g<G_CNT; ++g) {\r
- for (r=0; r<R_CNT; ++r) {\r
- c_r = 0.5 + (double)r*(max-R_BIAS)/(R_CNT-1.) + R_BIAS;\r
- c_g = 0.5 + (double)g*(max-G_BIAS)/(G_CNT-1.) + G_BIAS;\r
- c_b = 0.5 + (double)b*(max-B_BIAS)/(B_CNT-1.) + B_BIAS;\r
- fake_setcolor(color++, (int)c_r, (int)c_g, (int)c_b);\r
- }\r
- }\r
- }\r
-\r
- for (color=0; color<256; color++) {\r
- c_r = (double)color*R_CNT/256.;\r
- c_g = (double)color*G_CNT/256.;\r
- c_b = (double)color*B_CNT/256.;\r
- array_r[color] = (int)c_r;\r
- array_g[color] = (int)c_g;\r
- array_b[color] = (int)c_b;\r
- }\r
-}\r
-\r
-\r
-\r
-/* Desc: sync buffer with video hardware\r
- *\r
- * In : ptr to old buffer, position, size\r
- * Out : 0 if success\r
- *\r
- * Note: -\r
- */\r
-int vl_sync_buffer (void **buffer, int x, int y, int width, int height)\r
-{\r
- if ((width & 7) || (x < 0) || (y < 0) || (x+width > video_mode->xres) || (y+height > video_mode->yres)) {\r
- return -1;\r
- } else {\r
- void *newbuf = *buffer;\r
-\r
- if ((newbuf == NULL) || (vl_current_width != width) || (vl_current_height != height)) {\r
- newbuf = realloc(newbuf, width * height * video_bypp);\r
- }\r
-\r
- if (newbuf == NULL) {\r
- return -2;\r
- }\r
-\r
- vl_current_width = width;\r
- vl_current_height = height;\r
- vl_current_stride = vl_current_width * video_bypp;\r
- vl_current_bytes = vl_current_stride * height;\r
-\r
- vl_current_offset = video_scanlen * y + video_bypp * x;\r
- vl_current_delta = video_scanlen - vl_current_stride;\r
-\r
- vl_current_draw_buffer = vl_current_read_buffer = *buffer = newbuf;\r
- return 0;\r
- }\r
-}\r
-\r
-\r
-\r
-/* Desc: state retrieval\r
- *\r
- * In : name, storage\r
- * Out : -\r
- *\r
- * Note: -\r
- */\r
-int vl_get (int pname, int *params)\r
-{\r
- switch (pname) {\r
- case VL_GET_SCREEN_SIZE:\r
- params[0] = video_mode->xres;\r
- params[1] = video_mode->yres;\r
- break;\r
- default:\r
- return drv->get(pname, params);\r
- }\r
- return 0;\r
-}\r
-\r
-\r
-\r
-/* Desc: setup mode\r
- *\r
- * In : ptr to mode definition\r
- * Out : 0 if success\r
- *\r
- * Note: -\r
- */\r
-static int vl_setup_mode (vl_mode *p)\r
-{\r
- if (p == NULL) {\r
- return -1;\r
- }\r
-\r
-#define INITPTR(bpp) \\r
- vl_putpixel = v_putpixel##bpp; \\r
- vl_getrgba = v_getrgba##bpp; \\r
- vl_getpixel = v_getpixel##bpp; \\r
- vl_rect = v_rect##bpp; \\r
- vl_mixfix = vl_mixfix##bpp; \\r
- vl_mixrgb = vl_mixrgb##bpp; \\r
- vl_mixrgba = vl_mixrgba##bpp; \\r
- vl_clear = _can_mmx() ? v_clear##bpp##_mmx : v_clear##bpp\r
- \r
- switch (p->bpp) {\r
- case 8:\r
- INITPTR(8);\r
- break;\r
- case 15:\r
- INITPTR(15);\r
- break;\r
- case 16:\r
- INITPTR(16);\r
- break;\r
- case 24:\r
- INITPTR(24);\r
- break;\r
- case 32:\r
- INITPTR(32);\r
- break;\r
- default:\r
- return -1;\r
- }\r
-\r
-#undef INITPTR\r
-\r
- video_mode = p;\r
- video_bypp = (p->bpp+7)/8;\r
- video_scanlen = p->scanlen;\r
- vl_video_selector = p->sel;\r
-\r
- return 0;\r
-}\r
-\r
-\r
-\r
-/* Desc: restore to the mode prior to first call to `vl_video_init'.\r
- *\r
- * In : -\r
- * Out : -\r
- *\r
- * Note: -\r
- */\r
-void vl_video_exit (void)\r
-{\r
- drv->restore();\r
- drv->fini();\r
-}\r
-\r
-\r
-\r
-/* Desc: enter mode\r
- *\r
- * In : xres, yres, bits/pixel, RGB, refresh rate\r
- * Out : pixel width in bits if success\r
- *\r
- * Note: -\r
- */\r
-int vl_video_init (int width, int height, int bpp, int rgb, int refresh)\r
-{\r
- int fake;\r
- vl_mode *p, *q;\r
- unsigned int min;\r
-\r
- fake = 0;\r
- if (!rgb) {\r
- bpp = 8;\r
- } else if (bpp == 8) {\r
- fake = 1;\r
- }\r
-\r
- /* initialize hardware */\r
- drv = &VESA;\r
- if ((q=drv->init()) == NULL) {\r
- drv = &VGA;\r
- if ((q=drv->init()) == NULL) {\r
- return 0;\r
- }\r
- }\r
-\r
- /* search for a mode that fits our request */\r
- for (min=-1, p=NULL; q->mode!=0xffff; q++) {\r
- if ((q->xres>=width) && (q->yres>=height) && (q->bpp==bpp)) {\r
- if (min>=(unsigned)(q->xres*q->yres)) {\r
- min = q->xres*q->yres;\r
- p = q;\r
- }\r
- }\r
- }\r
-\r
- /* setup and enter mode */\r
- if ((vl_setup_mode(p) == 0) && (drv->entermode(p, refresh) == 0)) {\r
- vl_flip = drv->blit;\r
- if (fake) {\r
- drv->get(VL_GET_CI_PREC, (int *)(&min));\r
- fake_buildpalette(min);\r
- if (min == 8) {\r
- vl_getrgba = v_getrgba8fake8;\r
- }\r
- }\r
- return bpp;\r
- }\r
-\r
- /* abort */\r
- return 0;\r
-}\r
+/*
+ * 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 for Mesa
+ *
+ * Author: Daniel Borca
+ * Email : dborca@users.sourceforge.net
+ * 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 "null.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;
+
+
+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,
+ 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
+};
+
+
+/* Desc: color composition (w/o ALPHA)
+ *
+ * In : array of integers (R, G, B)
+ * Out : color
+ *
+ * Note: -
+ */
+static int
+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]];
+}
+
+
+/* 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_getrgb8fake6 (unsigned int offset, unsigned char rgb[])
+{
+ 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_getrgb8fake8 (unsigned int offset, unsigned char rgb[])
+{
+ word32 c = VGAPalette[((word8 *)vl_current_read_buffer)[offset]];
+ rgb[0] = c >> 16;
+ rgb[1] = c >> 8;
+ rgb[2] = c;
+}
+
+
+/* Desc: create R5G6B5 to FakeColor table lookup
+ *
+ * In : -
+ * Out : -
+ *
+ * Note: -
+ */
+static void
+init_tab_16_8 (void)
+{
+ 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
+ * 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: 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
+ *
+ * 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 ((/*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 : -1 for an error
+ *
+ * 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;
+ 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
+ * Out : 0 if success
+ *
+ * Note: -
+ */
+static int
+vl_setup_mode (vl_mode *p)
+{
+ 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 : -
+ * Out : -
+ *
+ * Note: -
+ */
+void
+vl_video_exit (void)
+{
+ drv->restore();
+ drv->fini();
+ video_mode = NULL;
+}
+
+
+/* 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 fbbits)
+{
+ 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;
+ }
+
+ /* abort */
+ return 0;
+}
projects / mesa.git / blobdiff