#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
+#include "demo.h"
+#include "cdpmi.h"
#include "gfx.h"
#include "vbe.h"
#include "vga.h"
-#include "cdpmi.h"
+#include "util.h"
+
+#define SAME_BPP(a, b) \
+ ((a) == (b) || ((a) == 16 && (b) == 15) || ((a) == 15 && (b) == 16) || \
+ ((a) == 32 && (b) == 24) || ((a) == 24 && (b) == 32))
-#define SAME_BPP(a, b) \
- ((a) == (b) || ((a) == 16 && (b) == 15) || ((a) == 15 && (b) == 16) || \
- ((a) == 32 && (b) == 24) || ((a) == 24 && (b) == 32))
+void (*blit_frame)(void*, int);
+
+static void blit_frame_lfb(void *pixels, int vsync);
+static void blit_frame_banked(void *pixels, int vsync);
+static uint32_t calc_mask(int sz, int pos);
+
+static struct video_mode *vmodes;
+static int num_vmodes;
static int vbe_init_ver;
static struct vbe_info vbe;
-static int mode, pgsize, fbsize;
-static struct vbe_mode_info mode_info;
+/* current mode */
+static struct video_mode *curmode;
static void *vpgaddr[2];
-static int fbidx;
-static int pgcount;
+static int frontidx, backidx;
+static int pgcount, pgsize, fbsize;
+
-static int init_vbe(void)
+int init_video(void)
{
- int i, num;
+ int i, num, max_modes;
+ struct video_mode *vmptr;
if(vbe_info(&vbe) == -1) {
fprintf(stderr, "failed to retrieve VBE information\n");
return -1;
}
-
vbe_print_info(stdout, &vbe);
+ num_vmodes = 0;
+ max_modes = 64;
+ if(!(vmodes = malloc(max_modes * sizeof *vmodes))) {
+ fprintf(stderr, "failed to allocate video modes list\n");
+ return -1;
+ }
+
num = vbe_num_modes(&vbe);
for(i=0; i<num; i++) {
struct vbe_mode_info minf;
if(vbe_mode_info(vbe.modes[i], &minf) == -1) {
continue;
}
+
+ if(num_vmodes >= max_modes) {
+ int newmax = max_modes ? (max_modes << 1) : 16;
+ if(!(vmptr = realloc(vmodes, newmax * sizeof *vmodes))) {
+ fprintf(stderr, "failed to grow video mode list (%d)\n", newmax);
+ free(vmodes);
+ return -1;
+ }
+ vmodes = vmptr;
+ max_modes = newmax;
+ }
+
+ vmptr = vmodes + num_vmodes++;
+ memset(vmptr, 0, sizeof *vmptr);
+ vmptr->mode = vbe.modes[i];
+ vmptr->xsz = minf.xres;
+ vmptr->ysz = minf.yres;
+ vmptr->bpp = minf.bpp;
+ vmptr->pitch = minf.scanline_bytes;
+ if(minf.mem_model == VBE_TYPE_DIRECT) {
+ vmptr->rbits = minf.rsize;
+ vmptr->gbits = minf.gsize;
+ vmptr->bbits = minf.bsize;
+ vmptr->rshift = minf.rpos;
+ vmptr->gshift = minf.gpos;
+ vmptr->bshift = minf.bpos;
+ vmptr->rmask = calc_mask(minf.rsize, minf.rpos);
+ vmptr->gmask = calc_mask(minf.gsize, minf.gpos);
+ vmptr->bmask = calc_mask(minf.bsize, minf.bpos);
+ vmptr->bpp = vmptr->rbits + vmptr->gbits + vmptr->bbits;
+ }
+ if(minf.attr & VBE_ATTR_LFB) {
+ vmptr->fb_addr = minf.fb_addr;
+ } else {
+ vmptr->bank_size = (uint32_t)minf.bank_size * 1024;
+ if(!vmptr->bank_size) {
+ vmptr->bank_size = 65536;
+ }
+ }
+ vmptr->max_pages = minf.num_img_pages;
+
printf("%04x: ", vbe.modes[i]);
vbe_print_mode_info(stdout, &minf);
}
return 0;
}
-void *set_video_mode(int xsz, int ysz, int bpp, int nbuf)
+void cleanup_video(void)
{
- int i, nmodes;
- int best_match_mode = -1;
- struct vbe_mode_info minf;
+ free(vmodes);
+}
- if(!vbe_init_ver) {
- if(init_vbe() == -1) {
- fprintf(stderr, "failed to initialize VBE\n");
- return 0;
- }
- if(vbe_init_ver < 2) {
- fprintf(stderr, "VBE >= 2.0 required\n");
- return 0;
- }
+struct video_mode *video_modes(void)
+{
+ return vmodes;
+}
+
+int num_video_modes(void)
+{
+ return num_vmodes;
+}
+
+struct video_mode *get_video_mode(int idx)
+{
+ if(idx == VMODE_CURRENT) {
+ return curmode;
}
+ return vmodes + idx;
+}
- mode = -1;
- nmodes = vbe_num_modes(&vbe);
- for(i=0; i<nmodes; i++) {
- if(vbe_mode_info(vbe.modes[i], &minf) == -1) {
- continue;
- }
- if(minf.xres != xsz || minf.yres != ysz) continue;
- if(minf.bpp == bpp) {
- mode = vbe.modes[i];
- break;
- }
- if(SAME_BPP(minf.bpp, bpp)) {
- best_match_mode = mode;
+int match_video_mode(int xsz, int ysz, int bpp)
+{
+ int i, best = -1;
+ struct video_mode *vm;
+
+ for(i=0; i<num_vmodes; i++) {
+ vm = vmodes + i;
+ if(vm->xsz != xsz || vm->ysz != ysz) continue;
+ if(SAME_BPP(vm->bpp, bpp)) {
+ best = i;
}
+ if(vm->bpp == bpp) break;
+ }
+
+ if(best == -1) {
+ fprintf(stderr, "failed to find video mode %dx%d %d bpp)\n", xsz, ysz, bpp);
+ return -1;
}
+ return best;
+}
+
+int find_video_mode(int mode)
+{
+ int i;
+ struct video_mode *vm;
- if(mode == -1) {
- if(best_match_mode == -1) {
- fprintf(stderr, "failed to find requested video mode (%dx%d %d bpp)\n", xsz, ysz, bpp);
+ vm = vmodes;
+ for(i=0; i<num_vmodes; i++) {
+ if(vm->mode == mode) return i;
+ }
+ return -1;
+}
+
+void *set_video_mode(int idx, int nbuf)
+{
+ unsigned int mode;
+ struct video_mode *vm = vmodes + idx;
+
+ if(curmode == vm) return vpgaddr[0];
+
+ printf("setting video mode %x (%dx%d %d bpp)\n", (unsigned int)vm->mode,
+ vm->xsz, vm->ysz, vm->bpp);
+ fflush(stdout);
+
+ mode = vm->mode | VBE_MODE_LFB;
+ if(vbe_setmode(mode) == -1) {
+ mode = vm->mode;
+ if(vbe_setmode(mode) == -1) {
+ fprintf(stderr, "failed to set video mode %x\n", (unsigned int)vm->mode);
return 0;
}
- mode = best_match_mode;
+ printf("Warning: failed to get a linear framebuffer. falling back to banked mode\n");
}
- vbe_mode_info(mode, &mode_info);
- printf("setting video mode %x: (%dx%d %d)\n", (unsigned int)mode, mode_info.xres,
- mode_info.yres, mode_info.bpp);
-
- if(vbe_setmode(mode | VBE_MODE_LFB) == -1) {
- fprintf(stderr, "failed to set video mode\n");
- return 0;
+ /* unmap previous video memory mapping, if there was one (switching modes) */
+ if(vpgaddr[0] && vpgaddr[0] != (void*)0xa0000) {
+ dpmi_munmap(vpgaddr[0]);
+ vpgaddr[0] = vpgaddr[1] = 0;
}
+ curmode = vm;
if(nbuf < 1) nbuf = 1;
if(nbuf > 2) nbuf = 2;
- pgcount = nbuf > mode_info.num_img_pages ? mode_info.num_img_pages : nbuf;
-
- pgsize = mode_info.xres * mode_info.yres * (bpp / 8);
+ pgcount = nbuf > vm->max_pages ? vm->max_pages : nbuf;
+ pgsize = vm->ysz * vm->pitch;
fbsize = pgcount * pgsize;
- vpgaddr[0] = (void*)dpmi_mmap(mode_info.fb_addr, fbsize);
- memset(vpgaddr[0], 0xaa, fbsize);
+ printf("pgcount: %d, pgsize: %d, fbsize: %d\n", pgcount, pgsize, fbsize);
+ printf("phys addr: %p\n", (void*)vm->fb_addr);
+ fflush(stdout);
+
+ if(vm->fb_addr) {
+ vpgaddr[0] = (void*)dpmi_mmap(vm->fb_addr, fbsize);
+ if(!vpgaddr[0]) {
+ fprintf(stderr, "failed to map framebuffer (phys: %lx, size: %d)\n",
+ (unsigned long)vm->fb_addr, fbsize);
+ set_text_mode();
+ return 0;
+ }
+ memset(vpgaddr[0], 0xaa, pgsize);
+
+ if(pgcount > 1) {
+ vpgaddr[1] = (char*)vpgaddr[0] + pgsize;
+ backidx = 1;
+ page_flip(FLIP_NOW); /* start with the second page visible */
+ } else {
+ frontidx = backidx = 0;
+ vpgaddr[1] = 0;
+ }
+
+ blit_frame = blit_frame_lfb;
- if(pgcount > 1) {
- vpgaddr[1] = (char*)vpgaddr[0] + pgsize;
- fbidx = 1;
- page_flip(FLIP_NOW); /* start with the second page visible */
} else {
- fbidx = 0;
+ vpgaddr[0] = (void*)0xa0000;
vpgaddr[1] = 0;
+
+ blit_frame = blit_frame_banked;
+ }
+
+ /* allocate main memory framebuffer */
+ if(resizefb(vm->xsz, vm->ysz, vm->bpp) == -1) {
+ fprintf(stderr, "failed to allocate %dx%d (%d bpp) framebuffer\n", vm->xsz,
+ vm->ysz, vm->bpp);
+ set_text_mode();
+ return 0;
}
return vpgaddr[0];
int set_text_mode(void)
{
+ /* unmap previous video memory mapping, if there was one (switching modes) */
+ if(vpgaddr[0] && vpgaddr[0] != (void*)0xa0000) {
+ dpmi_munmap(vpgaddr[0]);
+ vpgaddr[0] = vpgaddr[1] = 0;
+ }
+
vga_setmode(3);
+ curmode = 0;
return 0;
}
return vpgaddr[0];
}
- vbe_swap(fbidx ? pgsize : 0, vsync ? VBE_SWAP_VBLANK : VBE_SWAP_NOW);
- fbidx = (fbidx + 1) & 1;
+ vbe_swap(backidx ? pgsize : 0, vsync ? VBE_SWAP_VBLANK : VBE_SWAP_NOW);
+ frontidx = backidx;
+ backidx = (backidx + 1) & 1;
+
+ return vpgaddr[backidx];
+}
+
+
+static void blit_frame_lfb(void *pixels, int vsync)
+{
+ if(show_fps) dbg_fps(pixels);
+ if(vsync) wait_vsync();
+ memcpy64(vpgaddr[frontidx], pixels, pgsize >> 3);
+}
+
+static void blit_frame_banked(void *pixels, int vsync)
+{
+ int i, sz, offs;
+ unsigned int pending;
+ unsigned char *pptr = pixels;
+
+ if(show_fps) dbg_fps(pixels);
+
+ if(vsync) wait_vsync();
+
+ /* assume initial window offset at 0 */
+ offs = 0;
+ pending = pgsize;
+ while(pending > 0) {
+ sz = pending > curmode->bank_size ? curmode->bank_size : pending;
+ //memcpy64((void*)0xa0000, pptr, sz >> 3);
+ memcpy((void*)0xa0000, pptr, sz);
+ pptr += sz;
+ pending -= sz;
+ vbe_setwin(0, ++offs);
+ }
+
+ vbe_setwin(0, 0);
+}
- return vpgaddr[fbidx];
+static uint32_t calc_mask(int sz, int pos)
+{
+ int i;
+ uint32_t mask = 0;
+ while(sz-- > 0) {
+ mask = (mask << 1) | 1;
+ }
+ return mask << pos;
}
projects / dosdemo / blobdiff