Make the existing ReinterpretFramebuffers/ShaderColorBitmask path work for Split/Second

It took writing and debugging #15500 for me to understand what the issue with the old path was..

Much simpler alternative to #15500, or we could merge both but disable Split/Second
for this one. Needs some benchmarks I guess...

Author: hrydgard

GPU/Common/DrawEngineCommon.cpp

@@ -501,7 +501,7 @@ bool DrawEngineCommon::ApplyFramebufferRead(bool *fboTexNeedsBind) {
 		lastFrameBlit = gpuStats.numFlips;
 	}
 	++blitsThisFrame;
-	if (blitsThisFrame > MAX_REASONABLE_BLITS_PER_FRAME * 2) {
+	if (blitsThisFrame > MAX_REASONABLE_BLITS_PER_FRAME * 4) {
 		WARN_LOG_ONCE(blendingBlit2, G3D, "Skipping additional blits needed for obscure blending: %d per frame, blend %d/%d/%d", blitsThisFrame, gstate.getBlendFuncA(), gstate.getBlendFuncB(), gstate.getBlendEq());
 		return false;
 	}

GPU/Common/GPUStateUtils.cpp

@@ -1033,7 +1033,7 @@ void ConvertMaskState(GenericMaskState &maskState, bool allowFramebufferRead) {
 }
 
 // Called even if AlphaBlendEnable == false - it also deals with stencil-related blend state.
-void ConvertBlendState(GenericBlendState &blendState, bool allowFramebufferRead) {
+void ConvertBlendState(GenericBlendState &blendState, bool allowFramebufferRead, bool forceReplaceBlend) {
 	// Blending is a bit complex to emulate.  This is due to several reasons:
 	//
 	//  * Doubled blend modes (src, dst, inversed) aren't supported in OpenGL.
@@ -1050,6 +1050,9 @@ void ConvertBlendState(GenericBlendState &blendState, bool allowFramebufferRead)
 	blendState.replaceAlphaWithStencil = REPLACE_ALPHA_NO;
 
 	ReplaceBlendType replaceBlend = ReplaceBlendWithShader(allowFramebufferRead, gstate.FrameBufFormat());
+	if (forceReplaceBlend) {
+		replaceBlend = REPLACE_BLEND_COPY_FBO;
+	}
 	ReplaceAlphaType replaceAlphaWithStencil = ReplaceAlphaWithStencil(replaceBlend);
 	bool usePreSrc = false;
 

GPU/Common/GPUStateUtils.h

@@ -166,7 +166,7 @@ struct GenericBlendState {
 	}
 };
 
-void ConvertBlendState(GenericBlendState &blendState, bool allowShaderBlend);
+void ConvertBlendState(GenericBlendState &blendState, bool allowShaderBlend, bool forceReplaceBlend);
 void ApplyStencilReplaceAndLogicOpIgnoreBlend(ReplaceAlphaType replaceAlphaWithStencil, GenericBlendState &blendState);
 
 struct GenericMaskState {

GPU/Common/ShaderId.cpp

@@ -253,6 +253,9 @@ void ComputeFragmentShaderID(FShaderID *id_out, const Draw::Bugs &bugs) {
 		// Note how we here recompute some of the work already done in state mapping.
 		// Not ideal! At least we share the code.
 		ReplaceBlendType replaceBlend = ReplaceBlendWithShader(gstate_c.allowFramebufferRead, gstate.FrameBufFormat());
+		if (colorWriteMask) {
+			replaceBlend = REPLACE_BLEND_COPY_FBO;
+		}
 		ReplaceAlphaType stencilToAlpha = ReplaceAlphaWithStencil(replaceBlend);
 
 		// All texfuncs except replace are the same for RGB as for RGBA with full alpha.

GPU/D3D11/StateMappingD3D11.cpp

@@ -155,13 +155,14 @@ void DrawEngineD3D11::ApplyDrawState(int prim) {
 			keys_.blend.colorWriteMask = (colorMask ? (1 | 2 | 4) : 0) | (alphaMask ? 8 : 0);
 		} else {
 			keys_.blend.value = 0;
-			// Set blend - unless we need to do it in the shader.
-			GenericBlendState blendState;
-			ConvertBlendState(blendState, gstate_c.allowFramebufferRead);
 
 			GenericMaskState maskState;
 			ConvertMaskState(maskState, gstate_c.allowFramebufferRead);
 
+			// Set blend - unless we need to do it in the shader.
+			GenericBlendState blendState;
+			ConvertBlendState(blendState, gstate_c.allowFramebufferRead, maskState.applyFramebufferRead);
+
 			if (blendState.applyFramebufferRead || maskState.applyFramebufferRead) {
 				if (ApplyFramebufferRead(&fboTexNeedsBind_)) {
 					// The shader takes over the responsibility for blending, so recompute.

GPU/Directx9/StateMappingDX9.cpp

@@ -125,13 +125,13 @@ void DrawEngineDX9::ApplyDrawState(int prim) {
 			bool alphaMask = gstate.isClearModeAlphaMask();
 			dxstate.colorMask.set(colorMask, colorMask, colorMask, alphaMask);
 		} else {
-			// Set blend - unless we need to do it in the shader.
-			GenericBlendState blendState;
-			ConvertBlendState(blendState, gstate_c.allowFramebufferRead);
-
 			GenericMaskState maskState;
 			ConvertMaskState(maskState, gstate_c.allowFramebufferRead);
 
+			// Set blend - unless we need to do it in the shader.
+			GenericBlendState blendState;
+			ConvertBlendState(blendState, gstate_c.allowFramebufferRead, maskState.applyFramebufferRead);
+
 			if (blendState.applyFramebufferRead || maskState.applyFramebufferRead) {
 				if (ApplyFramebufferRead(&fboTexNeedsBind_)) {
 					// The shader takes over the responsibility for blending, so recompute.

GPU/GLES/StateMappingGLES.cpp

@@ -155,12 +155,13 @@ void DrawEngineGLES::ApplyDrawState(int prim) {
 		} else {
 			// Do the large chunks of state conversion. We might be able to hide these two behind a dirty-flag each,
 			// to avoid recomputing heavy stuff unnecessarily every draw call.
-			GenericBlendState blendState;
-			ConvertBlendState(blendState, gstate_c.allowFramebufferRead);
 
 			GenericMaskState maskState;
 			ConvertMaskState(maskState, gstate_c.allowFramebufferRead);
 
+			GenericBlendState blendState;
+			ConvertBlendState(blendState, gstate_c.allowFramebufferRead, maskState.applyFramebufferRead);
+
 			if (blendState.applyFramebufferRead || maskState.applyFramebufferRead) {
 				if (ApplyFramebufferRead(&fboTexNeedsBind_)) {
 					// The shader takes over the responsibility for blending, so recompute.

GPU/Vulkan/StateMappingVulkan.cpp

@@ -161,13 +161,13 @@ void DrawEngineVulkan::ConvertStateToVulkanKey(FramebufferManagerVulkan &fbManag
 				key.logicOp = VK_LOGIC_OP_CLEAR;
 			}
 
-			// Set blend - unless we need to do it in the shader.
-			GenericBlendState blendState;
-			ConvertBlendState(blendState, gstate_c.allowFramebufferRead);
-
 			GenericMaskState maskState;
 			ConvertMaskState(maskState, gstate_c.allowFramebufferRead);
 
+			// Set blend - unless we need to do it in the shader.
+			GenericBlendState blendState;
+			ConvertBlendState(blendState, gstate_c.allowFramebufferRead, maskState.applyFramebufferRead);
+
 			if (blendState.applyFramebufferRead || maskState.applyFramebufferRead) {
 				if (ApplyFramebufferRead(&fboTexNeedsBind_)) {
 					// The shader takes over the responsibility for blending, so recompute.

assets/compat.ini

@@ -1025,6 +1025,12 @@ ULES01441 = true
 ULJM05600 = true
 ULJM05775 = true
 
+# Split Second
+ULES01402 = true
+ULUS10513 = true
+ULJM05812 = true
+NPJH50371 = true
+
 [ShaderColorBitmask]
 # Outrun 2006: Coast to Coast - issue #11358
 ULES00262 = true
@@ -1037,6 +1043,12 @@ ULJM05533 = true
 NPJH50006 = true
 ULES01301 = true
 
+# Split Second
+ULES01402 = true
+ULUS10513 = true
+ULJM05812 = true
+NPJH50371 = true
+
 [DisableFirstFrameReadback]
 # Wipeout Pure: Temporary workaround for lens flare flicker. See #13344
 UCUS98612 = true