Home | History | Annotate | Download | only in gpu 
      1 /*
      2  * Copyright 2012 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #ifndef GrEffectUnitTest_DEFINED
      9 #define GrEffectUnitTest_DEFINED
     10 
     11 #include "SkRandom.h"
     12 #include "GrNoncopyable.h"
     13 #include "SkTArray.h"
     14 
     15 class SkMatrix;
     16 
     17 namespace GrEffectUnitTest {
     18 // Used to access the dummy textures in TestCreate procs.
     19 enum {
     20     kSkiaPMTextureIdx = 0,
     21     kAlphaTextureIdx = 1,
     22 };
     23 
     24 /**
     25  * A helper for use in GrEffect::TestCreate functions.
     26  */
     27 const SkMatrix& TestMatrix(SkRandom*);
     28 
     29 }
     30 
     31 #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
     32 
     33 class GrContext;
     34 class GrEffectRef;
     35 class GrTexture;
     36 
     37 class GrEffectTestFactory : GrNoncopyable {
     38 public:
     39 
     40     typedef GrEffectRef* (*CreateProc)(SkRandom*, GrContext*, GrTexture* dummyTextures[]);
     41 
     42     GrEffectTestFactory(CreateProc createProc) {
     43         fCreateProc = createProc;
     44         GetFactories()->push_back(this);
     45     }
     46 
     47     static GrEffectRef* CreateStage(SkRandom* random,
     48                                     GrContext* context,
     49                                     GrTexture* dummyTextures[]) {
     50         uint32_t idx = random->nextRangeU(0, GetFactories()->count() - 1);
     51         GrEffectTestFactory* factory = (*GetFactories())[idx];
     52         return factory->fCreateProc(random, context, dummyTextures);
     53     }
     54 
     55 private:
     56     CreateProc fCreateProc;
     57     static SkTArray<GrEffectTestFactory*, true>* GetFactories();
     58 };
     59 
     60 /** GrEffect subclasses should insert this macro in their declaration to be included in the
     61  *  program generation unit test.
     62  */
     63 #define GR_DECLARE_EFFECT_TEST                                                      \
     64     static GrEffectTestFactory gTestFactory;                                        \
     65     static GrEffectRef* TestCreate(SkRandom*, GrContext*, GrTexture* dummyTextures[2])
     66 
     67 /** GrEffect subclasses should insert this macro in their implementation file. They must then
     68  *  also implement this static function:
     69  *      GrEffect* TestCreate(SkRandom*, GrContext*, GrTexture* dummyTextures[2]);
     70  * dummyTextures[] are valid textures that can optionally be used to construct GrTextureAccesses.
     71  * The first texture has config kSkia8888_PM_GrPixelConfig and the second has
     72  * kAlpha_8_GrPixelConfig. TestCreate functions are also free to create additional textures using
     73  * the GrContext.
     74  */
     75 #define GR_DEFINE_EFFECT_TEST(Effect)                                               \
     76     GrEffectTestFactory Effect :: gTestFactory(Effect :: TestCreate)
     77 
     78 #else // !SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
     79 
     80 // The unit test relies on static initializers. Just declare the TestCreate function so that
     81 // its definitions will compile.
     82 #define GR_DECLARE_EFFECT_TEST \
     83     static GrEffectRef* TestCreate(SkRandom*, GrContext*, GrTexture* dummyTextures[2])
     84 #define GR_DEFINE_EFFECT_TEST(X)
     85 
     86 #endif // !SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
     87 #endif
     88