fucked it up again, need to sleep

[eradicate] / src / dos / gfx.c

diff --git a/src/dos/gfx.c b/src/dos/gfx.c
index 61ac7db..5a8a63b 100644 (file)
--- a/src/dos/gfx.c
+++ b/src/dos/gfx.c
@@ -10,6 +10,10 @@
        ((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;
@@ -21,9 +25,10 @@ static struct vbe_info vbe;
 /* current mode */
 static struct video_mode *curmode;
 static void *vpgaddr[2];
-static int fbidx;
+static int frontidx, backidx;
 static int pgcount, pgsize, fbsize;
 
+
 int init_video(void)
 {
        int i, num, max_modes;
@@ -36,7 +41,7 @@ int init_video(void)
        vbe_print_info(stdout, &vbe);
 
        num_vmodes = 0;
-       max_modes = 4;  /* TODO change */
+       max_modes = 64;
        if(!(vmodes = malloc(max_modes * sizeof *vmodes))) {
                fprintf(stderr, "failed to allocate video modes list\n");
                return -1;
@@ -169,7 +174,7 @@ void *set_video_mode(int idx, int nbuf)
        if(nbuf < 1) nbuf = 1;
        if(nbuf > 2) nbuf = 2;
        pgcount = nbuf > vm->max_pages ? vm->max_pages : nbuf;
-       pgsize = (vm->xsz * vm->bpp / 8) * vm->ysz;
+       pgsize = vm->xsz * vm->ysz * vm->pitch;
        fbsize = pgcount * pgsize;
 
        printf("pgcount: %d, pgsize: %d, fbsize: %d\n", pgcount, pgsize, fbsize);
@@ -184,19 +189,24 @@ void *set_video_mode(int idx, int nbuf)
                        set_text_mode();
                        return 0;
                }
-               memset(vpgaddr[0], 0xaa, fbsize);
+               //memset(vpgaddr[0], 0xaa, pgsize);
 
                if(pgcount > 1) {
                        vpgaddr[1] = (char*)vpgaddr[0] + pgsize;
-                       fbidx = 1;
+                       backidx = 1;
                        page_flip(FLIP_NOW);    /* start with the second page visible */
                } else {
-                       fbidx = 0;
+                       frontidx = backidx = 0;
                        vpgaddr[1] = 0;
                }
+
+               blit_frame = blit_frame_lfb;
+
        } else {
                vpgaddr[0] = (void*)0xa0000;
                vpgaddr[1] = 0;
+
+               blit_frame = blit_frame_banked;
        }
        return vpgaddr[0];
 }
@@ -215,10 +225,40 @@ void *page_flip(int vsync)
                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(vsync) wait_vsync();
+       memcpy(vpgaddr[frontidx], pixels, pgsize);
+}
+
+static void blit_frame_banked(void *pixels, int vsync)
+{
+       int i, sz, offs;
+       unsigned int pending;
+       unsigned char *pptr = 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;
+               memcpy((void*)0xa0000, pptr, sz);
+               pptr += sz;
+               pending -= sz;
+               vbe_setwin(0, ++offs);
+       }
 
-       return vpgaddr[fbidx];
+       vbe_setwin(0, 0);
 }
 
 static uint32_t calc_mask(int sz, int pos)