dos backend partial rewrite starting with DPMI

[dosdemo] / src / dos / vbe.c

diff --git a/src/dos/vbe.c b/src/dos/vbe.c
deleted file mode 100644 (file)
index 5b1afb5..0000000
--- a/src/dos/vbe.c
+++ /dev/null
@@ -1,212 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <conio.h>
-#include "vbe.h"
-#include "cdpmi.h"
-#include "inttypes.h"
-
-#ifdef __DJGPP__
-#include <pc.h>
-#include <sys/nearptr.h>
-
-#define SEG_ADDR(s)    (((uint32_t)(s) << 4) - __djgpp_base_address)
-
-#define outp(p, v)     outportb(p, v)
-#else
-#define SEG_ADDR(s)    ((uint32_t)(s) << 4)
-#endif
-
-/* VGA DAC registers used for palette setting in 8bpp modes */
-#define VGA_DAC_STATE          0x3c7
-#define VGA_DAC_ADDR_RD                0x3c7
-#define VGA_DAC_ADDR_WR                0x3c8
-#define VGA_DAC_DATA           0x3c9
-
-#define MODE_LFB       (1 << 14)
-
-
-struct vbe_info *vbe_get_info(void)
-{
-       static uint16_t info_block_seg, info_block_selector;
-       static struct vbe_info *info;
-       struct dpmi_real_regs regs;
-
-       if(!info) {
-               /* allocate 32 paragraphs (512 bytes) */
-               info_block_seg = dpmi_alloc(32, &info_block_selector);
-               info = (struct vbe_info*)SEG_ADDR(info_block_seg);
-       }
-
-       memcpy(info->sig, "VBE2", 4);
-
-       memset(&regs, 0, sizeof regs);
-       regs.es = info_block_seg;
-       regs.eax = 0x4f00;
-
-       dpmi_real_int(0x10, &regs);
-
-       return info;
-}
-
-struct vbe_mode_info *vbe_get_mode_info(int mode)
-{
-       static uint16_t mode_info_seg, mode_info_selector;
-       static struct vbe_mode_info *mi;
-       struct dpmi_real_regs regs;
-
-       if(!mi) {
-               /* allocate 16 paragraphs (256 bytes) */
-               mode_info_seg = dpmi_alloc(16, &mode_info_selector);
-               mi = (struct vbe_mode_info*)SEG_ADDR(mode_info_seg);
-       }
-
-       memset(&regs, 0, sizeof regs);
-       regs.es = mode_info_seg;
-       regs.eax = 0x4f01;
-       regs.ecx = mode;
-       regs.es = mode_info_seg;
-
-       dpmi_real_int(0x10, &regs);
-       if(regs.eax & 0xff00) {
-               return 0;
-       }
-
-       return mi;
-}
-
-int vbe_set_mode(int mode)
-{
-       struct dpmi_real_regs regs;
-
-       memset(&regs, 0, sizeof regs);
-       regs.eax = 0x4f02;
-       regs.ebx = mode;
-       dpmi_real_int(0x10, &regs);
-
-       if(regs.eax == 0x100) {
-               return -1;
-       }
-       return 0;
-}
-
-int vbe_set_palette_bits(int bits)
-{
-       struct dpmi_real_regs regs;
-
-       memset(&regs, 0, sizeof regs);
-       regs.eax = 0x4f08;
-       regs.ebx = bits << 8;   /* bits in bh */
-       dpmi_real_int(0x10, &regs);
-
-       if(((regs.eax >> 8) & 0xff) == 3) {
-               return -1;
-       }
-       return regs.ebx >> 8 & 0xff;    /* new color bits in bh */
-}
-
-/* TODO: implement palette setting through the VBE2 interface for
- * non-VGA displays (actually don't).
- */
-void vbe_set_palette(int idx, int *col, int count, int bits)
-{
-       int i, shift = 8 - bits;
-
-       outp(VGA_DAC_ADDR_WR, idx);
-
-       for(i=0; i<count; i++) {
-               unsigned char r = *col++;
-               unsigned char g = *col++;
-               unsigned char b = *col++;
-
-               if(shift) {
-                       r >>= shift;
-                       g >>= shift;
-                       b >>= shift;
-               }
-
-               outp(VGA_DAC_DATA, r);
-               outp(VGA_DAC_DATA, g);
-               outp(VGA_DAC_DATA, b);
-       }
-}
-
-int vbe_set_disp_start(int x, int y, int when)
-{
-       struct dpmi_real_regs regs;
-
-       memset(&regs, 0, sizeof regs);
-       regs.eax = 0x4f07;
-       regs.ebx = when & 0xffff;
-       regs.ecx = x & 0xffff;
-       regs.edx = y & 0xffff;
-       dpmi_real_int(0x10, &regs);
-
-       if(regs.eax == 0x100) {
-               return -1;
-       }
-       return 0;
-}
-
-int vbe_set_scanlen(int len, int mode)
-{
-       struct dpmi_real_regs regs;
-
-       memset(&regs, 0, sizeof regs);
-       regs.eax = 0x4f06;
-       regs.ebx = mode;
-       regs.ecx = len & 0xffff;
-       dpmi_real_int(0x10, &regs);
-
-       if(regs.eax == 0x100) {
-               return -1;
-       }
-       return regs.ecx & 0xffff;
-}
-
-int vbe_get_scanlen(int mode)
-{
-       int res;
-       struct dpmi_real_regs regs;
-
-       memset(&regs, 0, sizeof regs);
-       regs.eax = 0x4f06;
-       regs.ebx = 1;
-       dpmi_real_int(0x10, &regs);
-
-       if(regs.eax == 0x100) {
-               return -1;
-       }
-
-       if(mode == VBE_SCANLEN_PIXELS) {
-               res = regs.ecx & 0xffff;
-       } else {
-               res = regs.ebx & 0xffff;
-       }
-       return res;
-}
-
-
-static unsigned int get_mask(int sz, int pos)
-{
-       unsigned int i, mask = 0;
-
-       for(i=0; i<sz; i++) {
-               mask |= 1 << i;
-       }
-       return mask << pos;
-}
-
-void print_mode_info(FILE *fp, struct vbe_mode_info *mi)
-{
-       fprintf(fp, "resolution: %dx%d\n", mi->xres, mi->yres);
-       fprintf(fp, "color depth: %d\n", mi->bpp);
-       fprintf(fp, "mode attributes: %x\n", mi->mode_attr);
-       fprintf(fp, "bytes per scanline: %d\n", mi->scanline_bytes);
-       fprintf(fp, "number of planes: %d\n", (int)mi->num_planes);
-       fprintf(fp, "number of banks: %d\n", (int)mi->num_banks);
-       fprintf(fp, "mem model: %d\n", (int)mi->mem_model);
-       fprintf(fp, "red bits: %d (mask: %x)\n", (int)mi->rmask_size, get_mask(mi->rmask_size, mi->rpos));
-       fprintf(fp, "green bits: %d (mask: %x)\n", (int)mi->gmask_size, get_mask(mi->gmask_size, mi->gpos));
-       fprintf(fp, "blue bits: %d (mask: %x)\n", (int)mi->bmask_size, get_mask(mi->bmask_size, mi->bpos));
-       fprintf(fp, "framebuffer address: %x\n", (unsigned int)mi->fb_addr);
-}