Refugee from Dead Machine 4: MDB Monster

src/gpu/effects/GrCustomXfermodePriv.h

Index: src/gpu/effects/GrCustomXfermodePriv.h
diff --git a/src/gpu/effects/GrCustomXfermodePriv.h b/src/gpu/effects/GrCustomXfermodePriv.h
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index 0000000000000000000000000000000000000000..2c150cdd31be0d026b593c69d8947989e706ef20
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+++ b/src/gpu/effects/GrCustomXfermodePriv.h
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+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrCustomXfermodePriv_DEFINED
+#define GrCustomXfermodePriv_DEFINED
+
+#include "GrCaps.h"
+#include "GrCoordTransform.h"
+#include "GrFragmentProcessor.h"
+#include "GrTextureAccess.h"
+#include "GrXferProcessor.h"
+#include "SkXfermode.h"
+
+class GrGLCaps;
+class GrGLFragmentProcessor;
+class GrInvariantOutput;
+class GrProcessorKeyBuilder;
+class GrTexture;
+
+///////////////////////////////////////////////////////////////////////////////
+// Fragment Processor
+///////////////////////////////////////////////////////////////////////////////
+
+class GrCustomXferFP : public GrFragmentProcessor {
+public:
+    GrCustomXferFP(GrProcessorDataManager*, SkXfermode::Mode mode, GrTexture* background, GrRenderTarget* dst);
+
+    const char* name() const override { return "Custom Xfermode"; }
+
+    SkXfermode::Mode mode() const { return fMode; }
+    const GrTextureAccess&  backgroundAccess() const { return fBackgroundAccess; }
+
+private:
+    GrGLFragmentProcessor* onCreateGLInstance() const override;
+
+    void onGetGLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override;
+
+    bool onIsEqual(const GrFragmentProcessor& other) const override; 
+
+    void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
+
+    GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
+
+    SkXfermode::Mode fMode;
+    GrCoordTransform fBackgroundTransform;
+    GrTextureAccess  fBackgroundAccess;
+
+    typedef GrFragmentProcessor INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Xfer Processor
+///////////////////////////////////////////////////////////////////////////////
+
+class GrCustomXPFactory : public GrXPFactory {
+public:
+    GrCustomXPFactory(SkXfermode::Mode mode); 
+
+    bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlags) const override {
+        return true;
+    }
+
+    void getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
+                                  GrXPFactory::InvariantBlendedColor*) const override;
+
+private:
+    GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
+                                           const GrProcOptInfo& colorPOI,
+                                           const GrProcOptInfo& coveragePOI,
+                                           bool hasMixedSamples,
+                                           const DstTexture*, GrRenderTarget* dst) const override; 
+
+    bool willReadDstColor(const GrCaps& caps,
+                          const GrProcOptInfo& colorPOI,
+                          const GrProcOptInfo& coveragePOI,
+                          bool hasMixedSamples) const override;
+
+    bool onIsEqual(const GrXPFactory& xpfBase) const override {
+        const GrCustomXPFactory& xpf = xpfBase.cast<GrCustomXPFactory>();
+        return fMode == xpf.fMode;
+    }
+
+    GR_DECLARE_XP_FACTORY_TEST;
+
+    SkXfermode::Mode fMode;
+    GrBlendEquation  fHWBlendEquation;
+
+    typedef GrXPFactory INHERITED;
+};
+#endif
+