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Implement Banshee/V3 vidProcCfg half mode. Fixes low res 16 bpp modes.

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This commit is contained in:
SarahW 2020-11-09 19:56:51 +00:00
commit c598f88f67
1 changed files with 7 additions and 1 deletions
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8
src/vid_voodoo_banshee.c
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@ -139,6 +139,7 @@ enum
#define VGAINIT0_EXTENDED_SHIFT_OUT (1 << 12) #define VGAINIT0_EXTENDED_SHIFT_OUT (1 << 12)
#define VIDPROCCFG_HALF_MODE (1 << 4)
#define VIDPROCCFG_OVERLAY_ENABLE (1 << 8) #define VIDPROCCFG_OVERLAY_ENABLE (1 << 8)
#define VIDPROCCFG_H_SCALE_ENABLE (1 << 14) #define VIDPROCCFG_H_SCALE_ENABLE (1 << 14)
#define VIDPROCCFG_V_SCALE_ENABLE (1 << 15) #define VIDPROCCFG_V_SCALE_ENABLE (1 << 15)
@ -311,9 +312,14 @@ static void banshee_render_16bpp_tiled(svga_t *svga)
int x; int x;
int offset = 32; int offset = 32;
uint32_t *p = &((uint32_t *)buffer32->line[svga->displine])[offset]; uint32_t *p = &((uint32_t *)buffer32->line[svga->displine])[offset];
uint32_t addr = banshee->desktop_addr + (banshee->desktop_y & 31) * 128 + ((banshee->desktop_y >> 5) * banshee->desktop_stride_tiled); uint32_t addr;
int drawn = 0; int drawn = 0;
if (banshee->vidProcCfg & VIDPROCCFG_HALF_MODE)
addr = banshee->desktop_addr + ((banshee->desktop_y >> 1) & 31) * 128 + ((banshee->desktop_y >> 6) * banshee->desktop_stride_tiled);
else
addr = banshee->desktop_addr + (banshee->desktop_y & 31) * 128 + ((banshee->desktop_y >> 5) * banshee->desktop_stride_tiled);
for (x = 0; x <= svga->hdisp; x += 64) for (x = 0; x <= svga->hdisp; x += 64)
{ {
if (svga->hwcursor_on || svga->overlay_on) if (svga->hwcursor_on || svga->overlay_on)