diff options
Diffstat (limited to 'nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/vga.c')
| -rw-r--r-- | nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/vga.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/vga.c b/nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/vga.c new file mode 100644 index 000000000..27758f14d --- /dev/null +++ b/nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/vga.c @@ -0,0 +1,250 @@ +/* + * Mesa 3-D graphics library + * Version: 4.1 + * + * 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 v1.7 for Mesa + * + * Copyright (C) 2002 - Borca Daniel + * Email : dborca@users.sourceforge.net + * Web : http://www.geocities.com/dborca + */ + + +#include <pc.h> +#include <stdlib.h> + +#include "video.h" +#include "vga.h" + + +static vl_mode modes[] = { + { + /* .xres = */ 320, + /* .yres = */ 200, + /* .bpp = */ 8, + /* .mode = */ 0x13 | 0x4000, + /* .scanlen = */ 320, + /* .sel = */ -1, + /* .gran = */ 320*200 + }, + { + /* .xres = */ -1, + /* .yres = */ -1, + /* .bpp = */ -1, + /* .mode = */ 0xffff, + /* .scanlen = */ -1, + /* .sel = */ -1, + /* .gran = */ -1 + } +}; + +static word16 vga_ver; +static int linear_selector; +static int oldmode = -1; + +#define vga_color_precision 6 + + +/* Desc: Attempts to detect VGA, check video modes and create selectors. + * + * In : - + * Out : mode array + * + * Note: - + */ +static vl_mode * +vga_init (void) +{ + int rv = 0; + + if (vga_ver) { + return modes; + } + + __asm("\n\ + movw $0x1a00, %%ax \n\ + int $0x10 \n\ + cmpb $0x1a, %%al \n\ + jne 0f \n\ + cmpb $0x07, %%bl \n\ + jb 0f \n\ + andl $0xff, %%ebx \n\ + movl %%ebx, %0 \n\ + 0:":"=g"(rv)::"%eax", "%ebx"); + if (rv == 0) { + return NULL; + } + + if (_create_selector(&linear_selector, 0xa0000, 0x10000)) { + return NULL; + } + + modes[0].sel = linear_selector; + + vga_ver = rv; + return modes; +} + + +/* Desc: Frees all resources allocated by VGA init code. + * + * In : - + * Out : - + * + * Note: - + */ +static void +vga_fini (void) +{ + if (vga_ver) { + _remove_selector(&linear_selector); + } +} + + +/* Desc: Attempts to enter specified video mode. + * + * In : ptr to mode structure, refresh rate + * Out : 0 if success + * + * Note: - + */ +static int +vga_entermode (vl_mode *p, int refresh) +{ + if (!(p->mode & 0x4000)) { + return -1; + } + VGA.blit = _can_mmx() ? vesa_l_dump_virtual_mmx : vesa_l_dump_virtual; + + if (oldmode == -1) { + __asm("\n\ + movb $0x0f, %%ah \n\ + int $0x10 \n\ + andl $0xff, %%eax \n\ + movl %%eax, %0 \n\ + ":"=g"(oldmode)::"%eax", "%ebx"); + } + + __asm("int $0x10"::"a"(p->mode&0xff)); + + return 0; + + (void)refresh; /* silence compiler warning */ +} + + +/* Desc: Restores to the mode prior to first call to vga_entermode. + * + * In : - + * Out : - + * + * Note: - + */ +static void +vga_restore (void) +{ + if (oldmode != -1) { + __asm("int $0x10"::"a"(oldmode)); + oldmode = -1; + } +} + + +/* Desc: set one palette entry + * + * In : color index, R, G, B + * Out : - + * + * Note: uses integer values + */ +static void +vga_setCI_i (int index, int red, int green, int blue) +{ +#if 0 + __asm("\n\ + movw $0x1010, %%ax \n\ + movb %1, %%dh \n\ + movb %2, %%ch \n\ + int $0x10 \n\ + "::"b"(index), "m"(red), "m"(green), "c"(blue):"%eax", "%edx"); +#else + outportb(0x03C8, index); + outportb(0x03C9, red); + outportb(0x03C9, green); + outportb(0x03C9, blue); +#endif +} + + +/* Desc: set one palette entry + * + * In : color index, R, G, B + * Out : - + * + * Note: uses normalized values + */ +static void +vga_setCI_f (int index, float red, float green, float blue) +{ + float max = (1 << vga_color_precision) - 1; + + vga_setCI_i(index, (int)(red * max), (int)(green * max), (int)(blue * max)); +} + + +/* Desc: state retrieval + * + * In : parameter name, ptr to storage + * Out : 0 if request successfully processed + * + * Note: - + */ +static int +vga_get (int pname, int *params) +{ + switch (pname) { + case VL_GET_CI_PREC: + params[0] = vga_color_precision; + break; + default: + return -1; + } + return 0; +} + + +/* + * the driver + */ +vl_driver VGA = { + vga_init, + vga_entermode, + NULL, + vga_setCI_f, + vga_setCI_i, + vga_get, + vga_restore, + vga_fini +}; |