+#include <stdio.h>
+#include <string.h>
+#include <stddef.h>
+#include <assert.h>
#include "vbe.h"
#include "cdpmi.h"
-int vbe_getinfo(struct vbe_info *info)
+
+#define FIXPTR(ptr) \
+ do { \
+ uint32_t paddr = (uint32_t)(ptr); \
+ uint16_t pseg = paddr >> 16; \
+ uint16_t poffs = paddr & 0xffff; \
+ if(pseg == seg && poffs < 512) { \
+ paddr = ((uint32_t)seg << 4) + poffs; \
+ } else { \
+ paddr = ((uint32_t)pseg << 4) + poffs; \
+ } \
+ (ptr) = (void*)paddr; \
+ } while(0)
+
+/* hijack the "VESA" sig field, to pre-cache number of modes */
+#define NMODES(inf) *(uint16_t*)((inf)->sig)
+#define NACCMODES(inf) *(uint16_t*)((inf)->sig + 2)
+
+int vbe_info(struct vbe_info *info)
{
+ int i, num;
void *lowbuf;
uint16_t seg, sel;
+ uint16_t *modeptr;
struct dpmi_regs regs = {0};
- if(!(seg = dpmi_alloc(512 / 16, &sel))) {
+ assert(sizeof *info == 512);
+
+ if(!(seg = dpmi_alloc(sizeof *info / 16, &sel))) {
return -1;
}
+ lowbuf = (void*)((uint32_t)seg << 4);
+
+ memcpy(lowbuf, "VBE2", 4);
regs.eax = 0x4f00;
regs.es = seg;
regs.edi = 0;
dpmi_int(0x10, ®s);
- if(regs.eax & 0xff00) {
+ if((regs.eax & 0xffff) != 0x4f) {
+ fprintf(stderr, "vbe_get_info (4f00) failed\n");
dpmi_free(sel);
return -1;
}
+ memcpy(info, lowbuf, sizeof *info);
+ dpmi_free(sel);
+
+ FIXPTR(info->oem_name);
+ FIXPTR(info->vendor);
+ FIXPTR(info->product);
+ FIXPTR(info->revstr);
+ FIXPTR(info->modes);
+ FIXPTR(info->accel_modes);
+
+ modeptr = info->modes;
+ while(*modeptr != 0xffff) {
+ if(modeptr - info->modes >= 256) {
+ modeptr = info->modes;
+ break;
+ }
+ modeptr++;
+ }
+ NMODES(info) = modeptr - info->modes;
+
+ if(info->caps & VBE_ACCEL) {
+ modeptr = info->accel_modes;
+ while(*modeptr != 0xffff) {
+ if(modeptr - info->accel_modes >= 256) {
+ modeptr = info->accel_modes;
+ break;
+ }
+ modeptr++;
+ }
+ NACCMODES(info) = modeptr - info->accel_modes;
+ }
+ return 0;
+}
+
+int vbe_num_modes(struct vbe_info *info)
+{
+ return NMODES(info);
+}
+
+int vbe_mode_info(int mode, struct vbe_mode_info *minf)
+{
+ int i, num;
+ void *lowbuf;
+ uint16_t seg, sel;
+ struct dpmi_regs regs = {0};
+
+ assert(sizeof *minf == 256);
+ assert(offsetof(struct vbe_mode_info, max_pixel_clock) == 0x3e);
+
+ if(!(seg = dpmi_alloc(sizeof *minf / 16, &sel))) {
+ return -1;
+ }
lowbuf = (void*)((uint32_t)seg << 4);
- memcpy(info, lowbuf, sizeof info);
+
+ regs.eax = 0x4f01;
+ regs.ecx = mode;
+ regs.es = seg;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ fprintf(stderr, "vbe_mode_info (4f01) failed\n");
+ dpmi_free(sel);
+ return -1;
+ }
+
+ memcpy(minf, lowbuf, sizeof *minf);
dpmi_free(sel);
return 0;
}
+
+void vbe_print_info(FILE *fp, struct vbe_info *vinf)
+{
+ fprintf(fp, "vbe version: %u.%u\n", VBE_VER_MAJOR(vinf->ver), VBE_VER_MINOR(vinf->ver));
+ if(VBE_VER_MAJOR(vinf->ver) >= 2) {
+ fprintf(fp, "%s - %s (%s)\n", vinf->vendor, vinf->product, vinf->revstr);
+ if(vinf->caps & VBE_ACCEL) {
+ fprintf(fp, "vbe/af %d.%d\n", VBE_VER_MAJOR(vinf->accel_ver), VBE_VER_MINOR(vinf->accel_ver));
+ }
+ } else {
+ fprintf(fp, "oem: %s\n", vinf->oem_name);
+ }
+ fprintf(fp, "video memory: %dkb\n", vinf->vmem_blk * 64);
+
+ if(vinf->caps) {
+ fprintf(fp, "caps:");
+ if(vinf->caps & VBE_8BIT_DAC) fprintf(fp, " dac8");
+ if(vinf->caps & VBE_NON_VGA) fprintf(fp, " non-vga");
+ if(vinf->caps & VBE_DAC_BLANK) fprintf(fp, " dac-blank");
+ if(vinf->caps & VBE_ACCEL) fprintf(fp, " af");
+ if(vinf->caps & VBE_MUSTLOCK) fprintf(fp, " af-lock");
+ if(vinf->caps & VBE_HWCURSOR) fprintf(fp, " af-curs");
+ if(vinf->caps & VBE_HWCLIP) fprintf(fp, " af-clip");
+ if(vinf->caps & VBE_TRANSP_BLT) fprintf(fp, " af-tblt");
+ fprintf(fp, "\n");
+ }
+
+ fprintf(fp, "%d video modes available\n", NMODES(vinf));
+ if(vinf->caps & VBE_ACCEL) {
+ fprintf(fp, "%d accelerated (VBE/AF) modes available\n", NACCMODES(vinf));
+ }
+ fflush(fp);
+}
+
+void vbe_print_mode_info(FILE *fp, struct vbe_mode_info *minf)
+{
+ fprintf(fp, "%dx%d %dbpp", minf->xres, minf->yres, minf->bpp);
+
+ switch(minf->mem_model) {
+ case VBE_TYPE_DIRECT:
+ fprintf(fp, " (rgb");
+ if(0) {
+ case VBE_TYPE_YUV:
+ fprintf(fp, " (yuv");
+ }
+ fprintf(fp, " %d%d%d)", minf->rsize, minf->gsize, minf->bsize);
+ break;
+ case VBE_TYPE_PLANAR:
+ fprintf(fp, " (%d planes)", minf->num_planes);
+ break;
+ case VBE_TYPE_PACKED:
+ fprintf(fp, " (packed)");
+ break;
+ case VBE_TYPE_TEXT:
+ fprintf(fp, " (%dx%d cells)", minf->xcharsz, minf->ycharsz);
+ break;
+ case VBE_TYPE_CGA:
+ fprintf(fp, " (CGA)");
+ break;
+ case VBE_TYPE_UNCHAIN:
+ fprintf(fp, " (unchained-%d)", minf->num_planes);
+ break;
+ }
+ fprintf(fp, " %dpg", minf->num_img_pages);
+
+ if(minf->attr & VBE_ATTR_LFB) {
+ fprintf(fp, " lfb@%lx", (unsigned long)minf->fb_addr);
+ }
+
+ fprintf(fp, " [");
+ if(minf->attr & VBE_ATTR_AVAIL) fprintf(fp, " avail");
+ if(minf->attr & VBE_ATTR_OPTINFO) fprintf(fp, " opt");
+ if(minf->attr & VBE_ATTR_TTY) fprintf(fp, " tty");
+ if(minf->attr & VBE_ATTR_COLOR) fprintf(fp, " color");
+ if(minf->attr & VBE_ATTR_GFX) fprintf(fp, " gfx");
+ if(minf->attr & VBE_ATTR_NOTVGA) fprintf(fp, " non-vga");
+ if(minf->attr & VBE_ATTR_BANKED) fprintf(fp, " banked");
+ if(minf->attr & VBE_ATTR_LFB) fprintf(fp, " lfb");
+ if(minf->attr & VBE_ATTR_2XSCAN) fprintf(fp, " dblscan");
+ if(minf->attr & VBE_ATTR_ILACE) fprintf(fp, " ilace");
+ if(minf->attr & VBE_ATTR_TRIPLEBUF) fprintf(fp, " trplbuf");
+ if(minf->attr & VBE_ATTR_STEREO) fprintf(fp, " stereo");
+ if(minf->attr & VBE_ATTR_STEREO_2FB) fprintf(fp, " stdual");
+ fprintf(fp, " ]\n");
+ fflush(fp);
+}
projects / dosdemo / blobdiff