Initial. Don't... just don't ask.
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Ryan McGrath
commit
00bae13bba
586 changed files with 129057 additions and 0 deletions
333
lrmi-0.6m/vbetest.c
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333
lrmi-0.6m/vbetest.c
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/*
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List the available VESA graphics and text modes.
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This program is in the public domain.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/kd.h>
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#include <sys/stat.h>
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#include "lrmi.h"
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#include "vbe.h"
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struct
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{
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struct vbe_info_block *info;
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struct vbe_mode_info_block *mode;
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} vbe;
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void *
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save_state(void)
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{
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struct LRMI_regs r;
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void *buffer;
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f04;
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r.ecx = 0xf; /* all states */
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r.edx = 0; /* get buffer size */
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't get video state buffer size (vm86 failure)\n");
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return NULL;
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}
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if ((r.eax & 0xffff) != 0x4f)
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{
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fprintf(stderr, "Get video state buffer size failed\n");
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return NULL;
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}
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buffer = LRMI_alloc_real((r.ebx & 0xffff) * 64);
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if (buffer == NULL)
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{
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fprintf(stderr, "Can't allocate video state buffer\n");
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return NULL;
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}
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f04;
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r.ecx = 0xf; /* all states */
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r.edx = 1; /* save state */
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r.es = (unsigned int)buffer >> 4;
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r.ebx = (unsigned int)buffer & 0xf;
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't save video state (vm86 failure)\n");
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return NULL;
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}
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if ((r.eax & 0xffff) != 0x4f)
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{
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fprintf(stderr, "Save video state failed\n");
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return NULL;
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}
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return buffer;
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}
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void
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restore_state(void *buffer)
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{
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struct LRMI_regs r;
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f04;
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r.ecx = 0xf; /* all states */
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r.edx = 2; /* restore state */
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r.es = (unsigned int)buffer >> 4;
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r.ebx = (unsigned int)buffer & 0xf;
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't restore video state (vm86 failure)\n");
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}
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else if ((r.eax & 0xffff) != 0x4f)
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{
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fprintf(stderr, "Restore video state failed\n");
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}
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LRMI_free_real(buffer);
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}
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void
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text_mode(void)
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{
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struct LRMI_regs r;
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memset(&r, 0, sizeof(r));
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r.eax = 3;
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't set text mode (vm86 failure)\n");
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}
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}
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void
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set_mode(int n)
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{
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struct LRMI_regs r;
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f02;
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r.ebx = n;
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't set video mode (vm86 failure)\n");
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}
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else if ((r.eax & 0xffff) != 0x4f)
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{
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fprintf(stderr, "Set video mode failed\n");
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}
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f01;
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r.ecx = n;
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r.es = (unsigned int)vbe.mode >> 4;
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r.edi = (unsigned int)vbe.mode & 0xf;
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't get mode info (vm86 failure)\n");
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return;
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}
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if ((r.eax & 0xffff) != 0x4f)
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{
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fprintf(stderr, "Get mode info failed\n");
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return;
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}
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/*
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Draw a blue/red fade on top line
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*/
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if (vbe.mode->memory_model == VBE_MODEL_RGB)
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{
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char *p = (char *)(vbe.mode->win_a_segment << 4);
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int pixel_size = (vbe.mode->bits_per_pixel + 7) / 8;
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int x_res = vbe.mode->x_resolution;
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int max_r = (1 << vbe.mode->red_mask_size) - 1;
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int max_b = (1 << vbe.mode->blue_mask_size) - 1;
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int shift_r = vbe.mode->red_field_position;
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int shift_b = vbe.mode->blue_field_position;
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int i;
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for (i = 0; i < x_res; i++)
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{
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int c;
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c = (i * max_r / x_res) << shift_r;
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c |= ((x_res - i) * max_b / x_res) << shift_b;
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memcpy(p + i * pixel_size, &c, pixel_size);
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}
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for (i=2048;i<0x7fff;i++)*(p+i)=(i&0xff);
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for(i=0x8000;i<0xffff;i++)*(p+i)=85;
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}
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}
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void
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interactive_set_mode(void)
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{
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int n;
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void *state;
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struct stat stat;
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if (fstat(0, &stat) != 0)
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{
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fprintf(stderr, "Can't stat() stdin\n");
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return;
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}
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if ((stat.st_rdev & 0xff00) != 0x400
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|| (stat.st_rdev & 0xff) > 63)
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{
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fprintf(stderr, "To switch video modes, "
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"this program must be run from the console\n");
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return;
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}
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printf("mode? ");
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scanf("%d", &n);
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printf("setting mode %d\n", n);
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ioctl(0, KDSETMODE, KD_GRAPHICS);
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state = save_state();
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if (state == NULL)
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return;
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set_mode(n);
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sleep(5);
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text_mode();
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restore_state(state);
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ioctl(0, KDSETMODE, KD_TEXT);
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}
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int
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main(void)
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{
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struct LRMI_regs r;
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short int *mode_list;
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if (!LRMI_init())
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return 1;
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vbe.info = LRMI_alloc_real(sizeof(struct vbe_info_block)
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+ sizeof(struct vbe_mode_info_block));
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if (vbe.info == NULL)
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{
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fprintf(stderr, "Can't alloc real mode memory\n");
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return 1;
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}
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vbe.mode = (struct vbe_mode_info_block *)(vbe.info + 1);
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/*
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Allow read/write to all IO ports
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*/
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ioperm(0, 0x400 , 1);
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iopl(3);
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f00;
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r.es = (unsigned int)vbe.info >> 4;
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r.edi = 0;
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memcpy(vbe.info->vbe_signature, "VBE2", 4);
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't get VESA info (vm86 failure)\n");
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return 1;
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}
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if ((r.eax & 0xffff) != 0x4f || strncmp(vbe.info->vbe_signature, "VESA", 4) != 0)
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{
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fprintf(stderr, "No VESA bios\n");
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return 1;
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}
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printf("VBE Version %x.%x\n",
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(int)(vbe.info->vbe_version >> 8) & 0xff,
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(int)vbe.info->vbe_version & 0xff);
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printf("%s\n",
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(char *)(vbe.info->oem_string_seg * 16 + vbe.info->oem_string_off));
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mode_list = (short int *)(vbe.info->video_mode_list_seg * 16 + vbe.info->video_mode_list_off);
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while (*mode_list != -1)
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{
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f01;
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r.ecx = *mode_list;
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r.es = (unsigned int)vbe.mode >> 4;
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r.edi = (unsigned int)vbe.mode & 0xf;
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't get mode info (vm86 failure)\n");
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return 1;
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}
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if (vbe.mode->memory_model == VBE_MODEL_RGB)
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printf("[%3d] %dx%d (%d:%d:%d)\n",
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*mode_list,
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vbe.mode->x_resolution,
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vbe.mode->y_resolution,
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vbe.mode->red_mask_size,
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vbe.mode->green_mask_size,
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vbe.mode->blue_mask_size);
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else if (vbe.mode->memory_model == VBE_MODEL_256)
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printf("[%3d] %dx%d (256 color palette)\n",
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*mode_list,
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vbe.mode->x_resolution,
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vbe.mode->y_resolution);
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else if (vbe.mode->memory_model == VBE_MODEL_PACKED)
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printf("[%3d] %dx%d (%d color palette)\n",
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*mode_list,
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vbe.mode->x_resolution,
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vbe.mode->y_resolution,
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1 << vbe.mode->bits_per_pixel);
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else if (vbe.mode->memory_model == VBE_MODEL_TEXT)
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printf("[%3d] %dx%d (TEXT)\n",
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*mode_list,
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vbe.mode->x_resolution,
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vbe.mode->y_resolution);
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else printf("[%3d] %dx%d (model=%d)\n",
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*mode_list,
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vbe.mode->x_resolution,
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vbe.mode->y_resolution,
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vbe.mode->memory_model);
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mode_list++;
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}
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LRMI_free_real(vbe.info);
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interactive_set_mode();
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return 0;
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}
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