diff options
Diffstat (limited to 'src/mesa/drivers/dos/vga.c')
| -rw-r--r-- | src/mesa/drivers/dos/vga.c | 190 |
1 files changed, 94 insertions, 96 deletions
diff --git a/src/mesa/drivers/dos/vga.c b/src/mesa/drivers/dos/vga.c index c8c0151ce3..27758f14d2 100644 --- a/src/mesa/drivers/dos/vga.c +++ b/src/mesa/drivers/dos/vga.c @@ -23,7 +23,7 @@ */ /* - * DOS/DJGPP device driver v1.6 for Mesa + * DOS/DJGPP device driver v1.7 for Mesa * * Copyright (C) 2002 - Borca Daniel * Email : dborca@users.sourceforge.net @@ -38,26 +38,25 @@ #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 - } + { + /* .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; @@ -67,7 +66,6 @@ static int oldmode = -1; #define vga_color_precision 6 - /* Desc: Attempts to detect VGA, check video modes and create selectors. * * In : - @@ -75,15 +73,16 @@ static int oldmode = -1; * * Note: - */ -static vl_mode *vga_init (void) +static vl_mode * +vga_init (void) { - int rv = 0; + int rv = 0; - if (vga_ver) { - return modes; - } + if (vga_ver) { + return modes; + } - __asm("\n\ + __asm("\n\ movw $0x1a00, %%ax \n\ int $0x10 \n\ cmpb $0x1a, %%al \n\ @@ -92,23 +91,22 @@ static vl_mode *vga_init (void) jb 0f \n\ andl $0xff, %%ebx \n\ movl %%ebx, %0 \n\ - 0:":"=g"(rv)::"%eax", "%ebx"); - if (rv == 0) { - return NULL; - } + 0:":"=g"(rv)::"%eax", "%ebx"); + if (rv == 0) { + return NULL; + } - if (_create_selector(&linear_selector, 0xa0000, 0x10000)) { - return NULL; - } + if (_create_selector(&linear_selector, 0xa0000, 0x10000)) { + return NULL; + } - modes[0].sel = linear_selector; + modes[0].sel = linear_selector; - vga_ver = rv; - return modes; + vga_ver = rv; + return modes; } - /* Desc: Frees all resources allocated by VGA init code. * * In : - @@ -116,15 +114,15 @@ static vl_mode *vga_init (void) * * Note: - */ -static void vga_fini (void) +static void +vga_fini (void) { - if (vga_ver) { - _remove_selector(&linear_selector); - } + if (vga_ver) { + _remove_selector(&linear_selector); + } } - /* Desc: Attempts to enter specified video mode. * * In : ptr to mode structure, refresh rate @@ -132,31 +130,31 @@ static void vga_fini (void) * * Note: - */ -static int vga_entermode (vl_mode *p, int refresh) +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 (!(p->mode & 0x4000)) { + return -1; + } + VGA.blit = _can_mmx() ? vesa_l_dump_virtual_mmx : vesa_l_dump_virtual; - if (oldmode == -1) { - __asm("\n\ + if (oldmode == -1) { + __asm("\n\ movb $0x0f, %%ah \n\ int $0x10 \n\ andl $0xff, %%eax \n\ movl %%eax, %0 \n\ - ":"=g"(oldmode)::"%eax", "%ebx"); - } + ":"=g"(oldmode)::"%eax", "%ebx"); + } - __asm("int $0x10"::"a"(p->mode&0xff)); + __asm("int $0x10"::"a"(p->mode&0xff)); - return 0; + return 0; - (void)refresh; /* silence compiler warning */ + (void)refresh; /* silence compiler warning */ } - /* Desc: Restores to the mode prior to first call to vga_entermode. * * In : - @@ -164,16 +162,16 @@ static int vga_entermode (vl_mode *p, int refresh) * * Note: - */ -static void vga_restore (void) +static void +vga_restore (void) { - if (oldmode != -1) { - __asm("int $0x10"::"a"(oldmode)); - oldmode = -1; - } + if (oldmode != -1) { + __asm("int $0x10"::"a"(oldmode)); + oldmode = -1; + } } - /* Desc: set one palette entry * * In : color index, R, G, B @@ -181,25 +179,25 @@ static void vga_restore (void) * * Note: uses integer values */ -static void vga_setCI_i (int index, int red, int green, int blue) +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"); + __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); + outportb(0x03C8, index); + outportb(0x03C9, red); + outportb(0x03C9, green); + outportb(0x03C9, blue); #endif } - /* Desc: set one palette entry * * In : color index, R, G, B @@ -207,15 +205,15 @@ static void vga_setCI_i (int index, int red, int green, int blue) * * Note: uses normalized values */ -static void vga_setCI_f (int index, float red, float green, float blue) +static void +vga_setCI_f (int index, float red, float green, float blue) { - float max = (1 << vga_color_precision) - 1; + float max = (1 << vga_color_precision) - 1; - vga_setCI_i(index, (int)(red * max), (int)(green * max), (int)(blue * max)); + vga_setCI_i(index, (int)(red * max), (int)(green * max), (int)(blue * max)); } - /* Desc: state retrieval * * In : parameter name, ptr to storage @@ -223,30 +221,30 @@ static void vga_setCI_f (int index, float red, float green, float blue) * * Note: - */ -static int vga_get (int pname, int *params) +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; + 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 + vga_init, + vga_entermode, + NULL, + vga_setCI_f, + vga_setCI_i, + vga_get, + vga_restore, + vga_fini }; |