create GrTestUtils.h, move some common functions into it

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 "GrTestUtils.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*);
-
-}
-
-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;
 }
 
 #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
 
 class GrContext;
 class GrProcessor;
 class GrTexture;
 
 template <class Processor>
 class GrProcessorTestFactory : SkNoncopyable {
@@ skipping 100 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