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Initial S3 ViRGE video overlay emulation.

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This commit is contained in:
TomW 2014-06-13 18:43:25 +01:00
commit f1e1cc0b25
15 changed files with 381 additions and 28 deletions
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21
src/vid_svga.c
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@ -400,7 +400,11 @@ void svga_poll(void *p)
{
// if (!(vc & 15)) pclog("VC %i %i\n", vc, GetTickCount());
if (svga->displine == svga->hwcursor_latch.y && svga->hwcursor_latch.ena)
svga->hwcursor_on = 64 - svga->hwcursor_latch.yoff;
svga->hwcursor_on = 64 - svga->hwcursor_latch.yoff;
if (svga->displine == svga->overlay_latch.y && svga->overlay_latch.ena)
svga->overlay_on = svga->overlay_latch.ysize - svga->overlay_latch.yoff;
svga->vidtime += svga->dispofftime;
// if (output) printf("Display off %f\n",vidtime);
svga->cgastat |= 1;
@ -414,11 +418,17 @@ void svga_poll(void *p)
if (svga->firstline == 2000)
svga->firstline = svga->displine;
if (svga->hwcursor_on)
if (svga->hwcursor_on || svga->overlay_on)
svga->changedvram[svga->ma >> 12] = svga->changedvram[(svga->ma >> 12) + 1] = 2;
svga->render(svga);
if (svga->overlay_on)
{
svga->overlay_draw(svga, svga->displine);
svga->overlay_on--;
}
if (svga->hwcursor_on)
{
svga->hwcursor_draw(svga, svga->displine);
@ -594,6 +604,9 @@ void svga_poll(void *p)
svga->hwcursor_on = 0;
svga->hwcursor_latch = svga->hwcursor;
svga->overlay_on = 0;
svga->overlay_latch = svga->overlay;
// pclog("Latch HWcursor addr %08X\n", svga_hwcursor_latch.addr);
// pclog("ADDR %08X\n",hwcursor_addr);
@ -609,7 +622,8 @@ int svga_init(svga_t *svga, void *p, int memsize,
void (*recalctimings_ex)(struct svga_t *svga),
uint8_t (*video_in) (uint16_t addr, void *p),
void (*video_out)(uint16_t addr, uint8_t val, void *p),
void (*hwcursor_draw)(struct svga_t *svga, int displine))
void (*hwcursor_draw)(struct svga_t *svga, int displine),
void (*overlay_draw)(struct svga_t *svga, int displine))
{
int c, d, e;
@ -639,6 +653,7 @@ int svga_init(svga_t *svga, void *p, int memsize,
svga->video_in = video_in;
svga->video_out = video_out;
svga->hwcursor_draw = hwcursor_draw;
svga->overlay_draw = overlay_draw;
// _svga_recalctimings(svga);
mem_mapping_add(&svga->mapping, 0xa0000, 0x20000, svga_read, svga_readw, svga_readl, svga_write, svga_writew, svga_writel, NULL, 0, svga);