Minor modifications to GrProgramDesc.h.

BUG=skia:

Review URL: https://codereview.chromium.org/1100483003

src/gpu/GrProgramDesc.h

@@ -12,8 +12,6 @@
 #include "GrTypesPriv.h"
 #include "SkChecksum.h"
 
-class GrGLGpu;
-
 /** This class describes a program to generate. It also serves as a program cache key. Very little
     of this is GL-specific. The GL-specific parts could be factored out into a subclass. */
 class GrProgramDesc {
@@ -76,7 +74,7 @@ public:
     // This should really only be used internally, base classes should return their own headers
     const KeyHeader& header() const { return *this->atOffset<KeyHeader, kHeaderOffset>(); }
 
-private:
+protected:
     template<typename T, size_t OFFSET> T* atOffset() {
         return reinterpret_cast<T*>(reinterpret_cast<intptr_t>(fKey.begin()) + OFFSET);
     }
@@ -117,9 +115,11 @@ private:
                         kMaxPreallocProcessors * sizeof(uint32_t) * kIntsPerProcessor,
     };
 
-    SkSTArray<kPreAllocSize, uint8_t, true> fKey;
+    SkSTArray<kPreAllocSize, uint8_t, true>& key() { return fKey; }
+    const SkSTArray<kPreAllocSize, uint8_t, true>& key() const { return fKey; }
 
-    friend class GrGLProgramDescBuilder;
+private:
+    SkSTArray<kPreAllocSize, uint8_t, true> fKey;
 };
 
 #endif

src/gpu/gl/GrGLProgramDesc.cpp

@@ -96,16 +96,18 @@ bool GrGLProgramDescBuilder::Build(GrProgramDesc* desc,
     // bindings in use or other descriptor field settings) it should be set
     // to a canonical value to avoid duplicate programs with different keys.
 
+    GrGLProgramDesc* glDesc = (GrGLProgramDesc*) desc;
+
     GR_STATIC_ASSERT(0 == kProcessorKeysOffset % sizeof(uint32_t));
     // Make room for everything up to the effect keys.
-    desc->fKey.reset();
-    desc->fKey.push_back_n(kProcessorKeysOffset);
+    glDesc->key().reset();
+    glDesc->key().push_back_n(kProcessorKeysOffset);
 
-    GrProcessorKeyBuilder b(&desc->fKey);
+    GrProcessorKeyBuilder b(&glDesc->key());
 
     primProc.getGLProcessorKey(batchTracker, gpu->glCaps(), &b);
     if (!get_meta_key(primProc, gpu->glCaps(), 0, &b)) {
-        desc->fKey.reset();
+        glDesc->key().reset();
         return false;
     }
 
@@ -114,7 +116,7 @@ bool GrGLProgramDescBuilder::Build(GrProgramDesc* desc,
         const GrFragmentProcessor& fp = *fps.processor();
         fp.getGLProcessorKey(gpu->glCaps(), &b);
         if (!get_meta_key(fp, gpu->glCaps(), primProc.getTransformKey(fp.coordTransforms()), &b)) {
-            desc->fKey.reset();
+            glDesc->key().reset();
             return false;
         }
     }
@@ -122,14 +124,14 @@ bool GrGLProgramDescBuilder::Build(GrProgramDesc* desc,
     const GrXferProcessor& xp = *pipeline.getXferProcessor();
     xp.getGLProcessorKey(gpu->glCaps(), &b);
     if (!get_meta_key(xp, gpu->glCaps(), 0, &b)) {
-        desc->fKey.reset();
+        glDesc->key().reset();
         return false;
     }
 
     // --------DO NOT MOVE HEADER ABOVE THIS LINE--------------------------------------------------
     // Because header is a pointer into the dynamic array, we can't push any new data into the key
     // below here.
-    KeyHeader* header = desc->atOffset<KeyHeader, kHeaderOffset>();
+    KeyHeader* header = glDesc->atOffset<KeyHeader, kHeaderOffset>();
 
     // make sure any padding in the header is zeroed.
     memset(header, 0, kHeaderSize);
@@ -144,6 +146,6 @@ bool GrGLProgramDescBuilder::Build(GrProgramDesc* desc,
 
     header->fColorEffectCnt = pipeline.numColorFragmentStages();
     header->fCoverageEffectCnt = pipeline.numCoverageFragmentStages();
-    desc->finalize();
+    glDesc->finalize();
     return true;
 }

src/gpu/gl/GrGLProgramDesc.h

@@ -14,6 +14,11 @@
 #include "GrTypesPriv.h"
 
 class GrGLGpu;
+class GrGLProgramDescBuilder;
+
+class GrGLProgramDesc : public GrProgramDesc {
+    friend class GrGLProgramDescBuilder;
+};
 
 /**
  * This class can be used to build a GrProgramDesc.  It also provides helpers for accessing
@@ -30,7 +35,7 @@ public:
     //    Each processor's key is a variable length array of uint32_t.
     enum {
         // Part 3.
-        kHeaderOffset = GrProgramDesc::kHeaderOffset,
+        kHeaderOffset = GrGLProgramDesc::kHeaderOffset,
         kHeaderSize = SkAlign4(sizeof(KeyHeader)),
         // Part 4.
         // This is the offset into the backenend specific part of the key, which includes

src/gpu/gl/GrGLTexture.h

@@ -13,6 +13,7 @@
 #include "GrTexture.h"
 #include "GrGLUtil.h"
 
+class GrGLGpu;
 
 class GrGLTexture : public GrTexture {