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pvr: implement tile array region clipping. always draw background 

fixes Quake 3 split-screen multiplayer
This commit is contained in:
Flyinghead 2020-12-15 14:17:58 +01:00
parent 9191795b4c
commit 93523df804
1 changed files with 61 additions and 6 deletions
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67
core/hw/pvr/ta_vtx.cpp
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@ -1428,6 +1428,7 @@ public:
};
static bool ClearZBeforePass(int pass_number);
static void getRegionTileClipping(u32& xmin, u32& xmax, u32& ymin, u32& ymax);
FifoSplitter<0> TAFifo0;
@ -1615,7 +1616,7 @@ bool ta_parse_vdrc(TA_context* ctx)
if (ctx->rend.Overrun)
break;
bool empty_pass = vd_rc.global_param_op.used() == (pass == 0 ? 1 : (int)vd_rc.render_passes.LastPtr()->op_count)
bool empty_pass = vd_rc.global_param_op.used() == (pass == 0 ? 0 : (int)vd_rc.render_passes.LastPtr()->op_count)
&& vd_rc.global_param_pt.used() == (pass == 0 ? 0 : (int)vd_rc.render_passes.LastPtr()->pt_count)
&& vd_rc.global_param_tr.used() == (pass == 0 ? 0 : (int)vd_rc.render_passes.LastPtr()->tr_count);
empty_context = empty_context && empty_pass;
@ -1652,6 +1653,15 @@ bool ta_parse_vdrc(TA_context* ctx)
fix_texture_bleeding(&vd_rc.global_param_pt);
fix_texture_bleeding(&vd_rc.global_param_tr);
}
if (rv && !overrun)
{
u32 xmin, xmax, ymin, ymax;
getRegionTileClipping(xmin, xmax, ymin, ymax);
vd_rc.fb_X_CLIP.min = std::max(vd_rc.fb_X_CLIP.min, xmin);
vd_rc.fb_X_CLIP.max = std::min(vd_rc.fb_X_CLIP.max, xmax + 31);
vd_rc.fb_Y_CLIP.min = std::max(vd_rc.fb_Y_CLIP.min, ymin);
vd_rc.fb_Y_CLIP.max = std::min(vd_rc.fb_Y_CLIP.max, ymax + 31);
}
vd_ctx->rend = vd_rc;
vd_ctx = 0;
@ -1845,21 +1855,66 @@ void FillBGP(TA_context* ctx)
cv[3].v = max_v;
}
static RegionArrayTile getRegionTile(int pass_number)
static void getRegionTileClipping(u32& xmin, u32& xmax, u32& ymin, u32& ymax)
{
xmin = 20;
xmax = 0;
ymin = 15;
ymax = 0;
u32 addr = REGION_BASE;
const bool type1_tile = ((FPU_PARAM_CFG >> 21) & 1) == 0;
int tile_size = (type1_tile ? 5 : 6) * 4;
bool empty_first_region = true;
for (int i = 0; i < 5; i++)
if ((vri(addr + (i + 1) * 4) & 0x80000000) == 0)
for (int i = type1_tile ? 4 : 5; i > 0; i--)
if ((vri(addr + i * 4) & 0x80000000) == 0)
{
empty_first_region = false;
break;
}
if (empty_first_region)
addr += 6 * 4;
addr += tile_size;
RegionArrayTile tile;
tile.full = vri(addr + pass_number * 6 * 4);
do {
tile.full = vri(addr);
xmin = std::min(xmin, tile.X);
xmax = std::max(xmax, tile.X);
ymin = std::min(ymin, tile.Y);
ymax = std::max(ymax, tile.Y);
if (type1_tile && tile.PreSort)
// Windows CE weirdness
tile_size = 6 * 4;
addr += tile_size;
} while (!tile.LastRegion);
xmin *= 32;
xmax *= 32;
ymin *= 32;
ymax *= 32;
}
static RegionArrayTile getRegionTile(int pass_number)
{
u32 addr = REGION_BASE;
const bool type1_tile = ((FPU_PARAM_CFG >> 21) & 1) == 0;
int tile_size = (type1_tile ? 5 : 6) * 4;
bool empty_first_region = true;
for (int i = type1_tile ? 4 : 5; i > 0; i--)
if ((vri(addr + i * 4) & 0x80000000) == 0)
{
empty_first_region = false;
break;
}
if (empty_first_region)
addr += tile_size;
RegionArrayTile tile;
tile.full = vri(addr);
if (type1_tile && tile.PreSort)
// Windows CE weirdness
tile_size = 6 * 4;
tile.full = vri(addr + pass_number * tile_size);
return tile;
}