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Diffstat (limited to 'src/mesa/drivers/dos/null.c')
| -rw-r--r-- | src/mesa/drivers/dos/null.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/src/mesa/drivers/dos/null.c b/src/mesa/drivers/dos/null.c new file mode 100644 index 0000000000..62e2c942ef --- /dev/null +++ b/src/mesa/drivers/dos/null.c @@ -0,0 +1,222 @@ +/* + * 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 v1.6 for Mesa + * + * Copyright (C) 2002 - Borca Daniel + * Email : dborca@users.sourceforge.net + * Web : http://www.geocities.com/dborca + */ + + +#include <stdlib.h> +#include <sys/segments.h> + +#include "video.h" +#include "null.h" + + + +static vl_mode *modes; + +#define null_color_precision 8 + + + + +static void null_blit_nop (void) +{ +} + + + +/* Desc: Attempts to detect VGA, check video modes and create selectors. + * + * In : - + * Out : mode array + * + * Note: - + */ +static vl_mode *null_init (void) +{ + static int m[][2] = { + {320, 200}, + {320, 240}, + {400, 300}, + {512, 384}, + {640, 400}, + {640, 480}, + {800, 600}, + {1024, 768}, + {1280, 1024}, + {1600, 1200} + }; + static int b[] = { + 8, + 15, + 16, + 24, + 32 + }; + + unsigned int i, j, k; + + if (modes == NULL) { + modes = malloc(sizeof(vl_mode) * + (1 + (sizeof(m) / sizeof(m[0]) * sizeof(b) / sizeof(b[0])))); + + if (modes != NULL) { + for (k = 0, i = 0; i < sizeof(m) / sizeof(m[0]); i++) { + for (j = 0; j < sizeof(b) / sizeof(b[0]); j++, k++) { + modes[k].xres = m[i][0]; + modes[k].yres = m[i][1]; + modes[k].bpp = b[j]; + modes[k].mode = 0x4000; + modes[k].scanlen = m[i][0] * ((b[j] + 7) / 8); + modes[k].sel = -1; + modes[k].gran = -1; + } + } + modes[k].xres = -1; + modes[k].yres = -1; + modes[k].bpp = -1; + modes[k].mode = 0xffff; + modes[k].scanlen = -1; + modes[k].sel = -1; + modes[k].gran = -1; + } + } + + return modes; +} + + + +/* Desc: Frees all resources allocated by VGA init code. + * + * In : - + * Out : - + * + * Note: - + */ +static void null_fini (void) +{ +} + + + +/* Desc: Attempts to enter specified video mode. + * + * In : ptr to mode structure, refresh rate + * Out : 0 if success + * + * Note: - + */ +static int null_entermode (vl_mode *p, int refresh) +{ + NUL.blit = null_blit_nop; + + return 0; + + (void)(p && refresh); /* silence compiler warning */ +} + + + +/* Desc: Restores to the mode prior to first call to null_entermode. + * + * In : - + * Out : - + * + * Note: - + */ +static void null_restore (void) +{ +} + + + +/* Desc: set one palette entry + * + * In : color index, R, G, B + * Out : - + * + * Note: uses integer values + */ +static void null_setCI_i (int index, int red, int green, int blue) +{ + (void)(index && red && green && blue); /* silence compiler warning */ +} + + + +/* Desc: set one palette entry + * + * In : color index, R, G, B + * Out : - + * + * Note: uses normalized values + */ +static void null_setCI_f (int index, float red, float green, float blue) +{ + float max = (1 << null_color_precision) - 1; + + null_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 null_get (int pname, int *params) +{ + switch (pname) { + default: + params[0] = params[0]; /* silence compiler warning */ + return -1; + } + return 0; +} + + + +/* + * the driver + */ +vl_driver NUL = { + null_init, + null_entermode, + NULL, + null_setCI_f, + null_setCI_i, + null_get, + null_restore, + null_fini +}; |