Create xfer processor backend.

src/gpu/gl/builders/GrGLProgramBuilder.h

Index: src/gpu/gl/builders/GrGLProgramBuilder.h
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.h b/src/gpu/gl/builders/GrGLProgramBuilder.h
index 973ae5e07820a1e24cb228980983f4d0500d8c44..f6c6fec502a5fd09aa336bf2851154685bb59b03 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.h
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.h
@@ -14,6 +14,7 @@
 #include "../GrGLProgramDataManager.h"
 #include "../GrGLUniformHandle.h"
 #include "../GrGLGeometryProcessor.h"
+#include "../GrGLXferProcessor.h"
 #include "../../GrOptDrawState.h"
 #include "../../GrPendingFragmentStage.h"
 
@@ -105,6 +106,7 @@ private:
 
     friend class GrGLVertexBuilder;
     friend class GrGLGeometryBuilder;
+    friend class GrGLXferBuilder;
     friend class GrGLFragmentShaderBuilder;
 };
 
@@ -164,8 +166,18 @@ public:
      */
 };
 
+/* a specializations for XPs. Lets the user add uniforms and FS code */
+class GrGLXPBuilder : public virtual GrGLUniformBuilder {
+public:
+    virtual GrGLFPFragmentBuilder* getFragmentShaderBuilder() = 0;
+
+    /*
+     * *NOTE* NO MEMBERS ALLOWED, MULTIPLE INHERITANCE
+     */
+};
 struct GrGLInstalledProc;
 struct GrGLInstalledGeoProc;
+struct GrGLInstalledXferProc;
 struct GrGLInstalledFragProc;
 struct GrGLInstalledFragProcs;
 
@@ -177,7 +189,8 @@ struct GrGLInstalledFragProcs;
  * respective builders
 */
 class GrGLProgramBuilder : public GrGLGPBuilder,
-                           public GrGLFPBuilder {
+                           public GrGLFPBuilder,
+                           public GrGLXPBuilder {
 public:
     /** Generates a shader program.
      *
@@ -282,8 +295,12 @@ protected:
     void emitAndInstallProc(const GrGeometryProcessor&,
                             const char* outColor,
                             const char* outCoverage);
+    void emitAndInstallXferProc(const GrXferProcessor&,
+                                const GrGLSLExpr4& colorIn,
+                                const GrGLSLExpr4& coverageIn);
 
     void verify(const GrGeometryProcessor&);
+    void verify(const GrXferProcessor&);
     void verify(const GrFragmentProcessor&);
     void emitSamplers(const GrProcessor&,
                       GrGLProcessor::TextureSamplerArray* outSamplers,
@@ -363,8 +380,10 @@ protected:
     int fStageIndex;
 
     GrGLInstalledGeoProc* fGeometryProcessor;
+    GrGLInstalledXferProc* fXferProcessor;
     SkAutoTUnref<GrGLInstalledFragProcs> fFragmentProcessors;
 
+

[joshualitt, 2014/12/08 19:46:41]

extra newline

[egdaniel, 2014/12/09 21:10:46]

Done.

     const GrOptDrawState& fOptState;
     const GrProgramDesc& fDesc;
     GrGpuGL* fGpu;
@@ -396,6 +415,11 @@ struct GrGLInstalledGeoProc : public GrGLInstalledProc {
     SkAutoTDelete<GrGLGeometryProcessor> fGLProc;
 };
 
+struct GrGLInstalledXferProc : public GrGLInstalledProc {
+    SkAutoTDelete<GrGLXferProcessor> fGLProc;
+};
+
+

[joshualitt, 2014/12/08 19:46:41]

extra newline

[egdaniel, 2014/12/09 21:10:46]

Done.

 struct GrGLInstalledFragProc : public GrGLInstalledProc {
     GrGLInstalledFragProc() : fGLProc(NULL) {}
     class ShaderVarHandle {