Merge pull request #18362 from unknownbrackets/softgpu-zmirror

softgpu: Point depthbuf at the first VRAM mirror
hrydgard · Oct 15, 2023 · 618589a · 618589a
2 parents 5580d47 + f7f0507
commit 618589a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/GPU/Software/SoftGpu.cpp b/GPU/Software/SoftGpu.cpp
@@ -1040,7 +1040,9 @@ void SoftGPU::Execute_ZbufPtr(u32 op, u32 diff) {
 	// We assume depthbuf.data won't change while we're drawing.
 	if (diff) {
 		drawEngine_->transformUnit.Flush("depthbuf");
-		depthbuf.data = Memory::GetPointerWrite(gstate.getDepthBufAddress());
+		// For the pointer, ignore memory mirrors.  This also gives some buffer for draws that go outside.
+		// TODO: Confirm how wrapping is handled in drawing.  Adjust if we ever handle VRAM mirrors more accurately.
+		depthbuf.data = Memory::GetPointerWrite(gstate.getDepthBufAddress() & 0x041FFFF0);
 	}
 }