Initial CL to move color / coverage off of drawstate

include/gpu/GrProcessorUnitTest.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrProcessorUnitTest_DEFINED
 #define GrProcessorUnitTest_DEFINED
 
+#include "GrColor.h"
 #include "SkRandom.h"
 #include "SkTArray.h"
 #include "SkTypes.h"
 
 class SkMatrix;
 class GrDrawTargetCaps;
 
 namespace GrProcessorUnitTest {
 // Used to access the dummy textures in TestCreate procs.
 enum {
     kSkiaPMTextureIdx = 0,
     kAlphaTextureIdx = 1,
 };
 
 /**
  * A helper for use in GrProcessor::TestCreate functions.
  */
 const SkMatrix& TestMatrix(SkRandom*);
 
 }
 
 #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
 
 class GrContext;
 class GrProcessor;
 class GrTexture;
 
+static inline GrColor GrRandomColor(SkRandom* random) {
+    // There are only a few cases of random colors which interest us
+    enum ColorMode {
+        kAllOnes_ColorMode,
+        kAllZeros_ColorMode,
+        kAlphaOne_ColorMode,
+        kRandom_ColorMode,
+        kLast_ColorMode = kRandom_ColorMode
+    };
+
+    ColorMode colorMode = ColorMode(random->nextULessThan(kLast_ColorMode + 1));
+    GrColor color;
+    switch (colorMode) {
+        case kAllOnes_ColorMode:
+            color = GrColorPackRGBA(0xFF, 0xFF, 0xFF, 0xFF);
+            break;
+        case kAllZeros_ColorMode:
+            color = GrColorPackRGBA(0, 0, 0, 0);
+            break;
+        case kAlphaOne_ColorMode:
+            color = GrColorPackRGBA(random->nextULessThan(256),
+                                    random->nextULessThan(256),
+                                    random->nextULessThan(256),
+                                    0xFF);
+            break;
+        case kRandom_ColorMode:
+            uint8_t alpha = random->nextULessThan(256);
+            color = GrColorPackRGBA(random->nextRangeU(0, alpha),
+                                    random->nextRangeU(0, alpha),
+                                    random->nextRangeU(0, alpha),
+                                    alpha);
+            break;
+    }
+    GrColorIsPMAssert(color);
+    return color;
+}
+
+static inline uint8_t GrRandomCoverage(SkRandom* random) {
+    enum CoverageMode {
+        kZero_CoverageMode,
+        kAllOnes_CoverageMode,
+        kRandom_CoverageMode,
+        kLast_CoverageMode = kRandom_CoverageMode
+    };
+
+    CoverageMode colorMode = CoverageMode(random->nextULessThan(kLast_CoverageMode + 1));
+    uint8_t coverage;
+    switch (colorMode) {
+        case kZero_CoverageMode:
+            coverage = 0;
+        case kAllOnes_CoverageMode:
+            coverage = 0xff;
+            break;
+        case kRandom_CoverageMode:
+            coverage = random->nextULessThan(256);
+            break;
+    }
+    return coverage;
+}
+
 template <class Processor>
 class GrProcessorTestFactory : SkNoncopyable {
 public:
 
     typedef Processor* (*CreateProc)(SkRandom*,
                                      GrContext*,
                                      const GrDrawTargetCaps& caps,
                                      GrTexture* dummyTextures[]);
 
     GrProcessorTestFactory(CreateProc createProc) {
@@ skipping 72 matching lines @@
 // its definitions will compile.
 #define GR_DECLARE_GEOMETRY_PROCESSOR_TEST                                                         \
     static GrGeometryProcessor* TestCreate(SkRandom*,                                              \
                                 GrContext*,                                                        \
                                 const GrDrawTargetCaps&,                                           \
                                 GrTexture* dummyTextures[2])
 #define GR_DEFINE_GEOMETRY_PROCESSOR_TEST(X)
 
 #endif // !SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
 #endif