d3d9: code to emulate ps2 alpha test

src/d3d/d3d9render.cpp

@@ -20,6 +20,43 @@ using namespace d3d;
 void defaultRenderCB(Atomic*, InstanceDataHeader*) {}
 #else
 
+void
+drawInst(d3d9::InstanceDataHeader *header, d3d9::InstanceData *inst)
+{
+	d3d::flushCache();
+	d3ddevice->DrawIndexedPrimitive((D3DPRIMITIVETYPE)header->primType, inst->baseIndex,
+	                                0, inst->numVertices,
+	                                inst->startIndex, inst->numPrimitives);
+}
+
+// Emulate PS2 GS alpha test FB_ONLY case: failed alpha writes to frame- but not to depth buffer
+void
+drawInst_GSemu(d3d9::InstanceDataHeader *header, InstanceData *inst)
+{
+	uint32 hasAlpha;
+	int alphafunc;
+	int zwrite;
+	d3d::getRenderState(D3DRS_ALPHABLENDENABLE, &hasAlpha);
+	if(hasAlpha){
+		zwrite = rw::GetRenderState(rw::ZWRITEENABLE);
+		alphafunc = rw::GetRenderState(rw::ALPHATESTFUNC);
+		if(zwrite){
+			SetRenderState(rw::ALPHATESTFUNC, rw::ALPHAGREATEREQUAL);
+			drawInst(header, inst);
+			SetRenderState(rw::ALPHATESTFUNC, rw::ALPHALESS);
+			SetRenderState(rw::ZWRITEENABLE, 0);
+			drawInst(header, inst);
+			SetRenderState(rw::ZWRITEENABLE, 1);
+			SetRenderState(rw::ALPHATESTFUNC, alphafunc);
+		}else{
+			SetRenderState(rw::ALPHATESTFUNC, rw::ALPHAALWAYS);
+			drawInst(header, inst);
+			SetRenderState(rw::ALPHATESTFUNC, alphafunc);
+		}
+	}else
+		drawInst(header, inst);
+}
+
 void
 defaultRenderCB(Atomic *atomic, InstanceDataHeader *header)
 {
@@ -29,8 +66,6 @@ defaultRenderCB(Atomic *atomic, InstanceDataHeader *header)
 	int lighting = !!(geo->flags & rw::Geometry::LIGHT);
 	if(lighting)
 		d3d::lightingCB();
-//	else
-//		return;
 
 	d3d::setRenderState(D3DRS_LIGHTING, lighting);
 
@@ -76,10 +111,7 @@ defaultRenderCB(Atomic *atomic, InstanceDataHeader *header)
 			d3d::setRenderState(D3DRS_EMISSIVEMATERIALSOURCE, D3DMCS_MATERIAL);
 		d3d::setRenderState(D3DRS_DIFFUSEMATERIALSOURCE, inst->vertexAlpha ? D3DMCS_COLOR1 : D3DMCS_MATERIAL);
 
-		d3d::flushCache();
+		drawInst(header, inst);
-		d3ddevice->DrawIndexedPrimitive((D3DPRIMITIVETYPE)header->primType, inst->baseIndex,
-		                                0, inst->numVertices,
-		                                inst->startIndex, inst->numPrimitives);
 		inst++;
 	}
 	d3d::setTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);

src/d3d/d3ddevice.cpp

@@ -418,6 +418,40 @@ setMaterial(SurfaceProperties surfProps, rw::RGBA color)
 	setD3dMaterial(&mat9);
 }
 
+// Shaders
+
+void
+setVertexShader(void *vs)
+{
+	d3ddevice->SetVertexShader((IDirect3DVertexShader9*)vs);
+}
+
+void
+setPixelShader(void *ps)
+{
+	d3ddevice->SetPixelShader((IDirect3DPixelShader9*)ps);
+}
+
+void*
+createVertexShader(void *csosrc)
+{
+	void *shdr;
+	if(d3ddevice->CreateVertexShader((DWORD*)csosrc, (IDirect3DVertexShader9**)&shdr) == D3D_OK)
+		return shdr;
+	return nil;
+}
+
+void*
+createPixelShader(void *csosrc)
+{
+	void *shdr;
+	if(d3ddevice->CreatePixelShader((DWORD*)csosrc, (IDirect3DPixelShader9**)&shdr) == D3D_OK)
+		return shdr;
+	return nil;
+}
+
+// Camera
+
 static void
 beginUpdate(Camera *cam)
 {

src/d3d/rwd3d.h

@@ -153,5 +153,10 @@ void flushCache(void);
 void setTexture(uint32 stage, Texture *tex);
 void setMaterial(SurfaceProperties surfProps, rw::RGBA color);
 
+void setVertexShader(void *vs);
+void setPixelShader(void *ps);
+void *createVertexShader(void *csosrc);
+void *createPixelShader(void *csosrc);
+
 }
 }

src/d3d/rwd3d9.h

@@ -54,6 +54,10 @@ struct InstanceDataHeader : rw::InstanceDataHeader
 void *createVertexDeclaration(VertexElement *elements);
 uint32 getDeclaration(void *declaration, VertexElement *elements);
 
+void drawInst(d3d9::InstanceDataHeader *header, d3d9::InstanceData *inst);
+// Emulate PS2 GS alpha test FB_ONLY case: failed alpha writes to frame- but not to depth buffer
+void drawInst_GSemu(d3d9::InstanceDataHeader *header, InstanceData *inst);
+
 void *destroyNativeData(void *object, int32, int32);
 Stream *readNativeData(Stream *stream, int32 len, void *object, int32, int32);
 Stream *writeNativeData(Stream *stream, int32 len, void *object, int32, int32);