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* perspective-correct Z interpolation

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* fix depth buffering. support W-buffer mode.
* 3D/2D blending. doesn't do much yet, but the code is here.
This commit is contained in:
StapleButter
2017-03-06 23:57:04 +01:00
parent ed385ce0f5
commit 72209c51f9
4 changed files with 67 additions and 64 deletions
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15
GPU3D.cpp
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@ -50,6 +50,8 @@
// formula for clear depth: (GBAtek is wrong there)
// clearZ = (val * 0x200) + 0x1FF;
// if (clearZ >= 0x010000 && clearZ < 0xFFFFFF) clearZ++;
//
// alpha is 5-bit
namespace GPU3D
@ -195,6 +197,7 @@ u32 NumVertices, NumPolygons;
u32 CurRAMBank;
u32 FlushRequest;
u32 FlushAttributes, CurFlushAttributes;
@ -1307,7 +1310,7 @@ void ExecuteCommand()
TexPalette = ExecParams[0] & 0x1FFF;
break;
case 0x40:
case 0x40: // begin polygons
PolygonMode = ExecParams[0] & 0x3;
VertexNum = 0;
VertexNumInPoly = 0;
@ -1316,8 +1319,9 @@ void ExecuteCommand()
CurPolygonAttr = PolygonAttr;
break;
case 0x50:
FlushRequest = 1;//0x80000000 | (ExecParams[0] & 0x3);
case 0x50: // flush
FlushRequest = 1;
FlushAttributes = ExecParams[0] & 0x3;
CycleCount = 392;
break;
@ -1383,7 +1387,7 @@ void VBlank()
{
if (FlushRequest)
{
SoftRenderer::RenderFrame(CurVertexRAM, CurPolygonRAM, NumPolygons);
SoftRenderer::RenderFrame(CurFlushAttributes, CurVertexRAM, CurPolygonRAM, NumPolygons);
CurRAMBank = CurRAMBank?0:1;
CurVertexRAM = &VertexRAM[CurRAMBank ? 6144 : 0];
@ -1393,10 +1397,11 @@ void VBlank()
NumPolygons = 0;
FlushRequest = 0;
CurFlushAttributes = FlushAttributes;
}
}
u8* GetLine(int line)
u32* GetLine(int line)
{
return SoftRenderer::GetLine(line);
}