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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_BASE_H_
      6 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_BASE_H_
      7 
      8 #include "gpu/command_buffer/common/gles2_cmd_format.h"
      9 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
     10 #include "gpu/command_buffer/service/buffer_manager.h"
     11 #include "gpu/command_buffer/service/cmd_buffer_engine.h"
     12 #include "gpu/command_buffer/service/context_group.h"
     13 #include "gpu/command_buffer/service/framebuffer_manager.h"
     14 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
     15 #include "gpu/command_buffer/service/gles2_cmd_decoder_mock.h"
     16 #include "gpu/command_buffer/service/program_manager.h"
     17 #include "gpu/command_buffer/service/query_manager.h"
     18 #include "gpu/command_buffer/service/renderbuffer_manager.h"
     19 #include "gpu/command_buffer/service/shader_manager.h"
     20 #include "gpu/command_buffer/service/test_helper.h"
     21 #include "gpu/command_buffer/service/texture_manager.h"
     22 #include "gpu/command_buffer/service/vertex_array_manager.h"
     23 #include "testing/gtest/include/gtest/gtest.h"
     24 #include "ui/gl/gl_context_stub_with_extensions.h"
     25 #include "ui/gl/gl_surface_stub.h"
     26 #include "ui/gl/gl_mock.h"
     27 
     28 namespace base {
     29 class CommandLine;
     30 }
     31 
     32 namespace gpu {
     33 namespace gles2 {
     34 
     35 class MemoryTracker;
     36 
     37 class GLES2DecoderTestBase : public ::testing::TestWithParam<bool> {
     38  public:
     39   GLES2DecoderTestBase();
     40   virtual ~GLES2DecoderTestBase();
     41 
     42   // Template to call glGenXXX functions.
     43   template <typename T>
     44   void GenHelper(GLuint client_id) {
     45     int8 buffer[sizeof(T) + sizeof(client_id)];
     46     T& cmd = *reinterpret_cast<T*>(&buffer);
     47     cmd.Init(1, &client_id);
     48     EXPECT_EQ(error::kNoError,
     49               ExecuteImmediateCmd(cmd, sizeof(client_id)));
     50   }
     51 
     52   // This template exists solely so we can specialize it for
     53   // certain commands.
     54   template <typename T, int id>
     55   void SpecializedSetup(bool valid) {
     56   }
     57 
     58   template <typename T>
     59   T* GetImmediateAs() {
     60     return reinterpret_cast<T*>(immediate_buffer_);
     61   }
     62 
     63   template <typename T, typename Command>
     64   T GetImmediateDataAs(Command* cmd) {
     65     return reinterpret_cast<T>(ImmediateDataAddress(cmd));
     66   }
     67 
     68   void ClearSharedMemory() {
     69     engine_->ClearSharedMemory();
     70   }
     71 
     72   virtual void SetUp() OVERRIDE;
     73   virtual void TearDown() OVERRIDE;
     74 
     75   template <typename T>
     76   error::Error ExecuteCmd(const T& cmd) {
     77     COMPILE_ASSERT(T::kArgFlags == cmd::kFixed, Cmd_kArgFlags_not_kFixed);
     78     return decoder_->DoCommand(cmd.kCmdId,
     79                                ComputeNumEntries(sizeof(cmd)) - 1,
     80                                &cmd);
     81   }
     82 
     83   template <typename T>
     84   error::Error ExecuteImmediateCmd(const T& cmd, size_t data_size) {
     85     COMPILE_ASSERT(T::kArgFlags == cmd::kAtLeastN, Cmd_kArgFlags_not_kAtLeastN);
     86     return decoder_->DoCommand(cmd.kCmdId,
     87                                ComputeNumEntries(sizeof(cmd) + data_size) - 1,
     88                                &cmd);
     89   }
     90 
     91   template <typename T>
     92   T GetSharedMemoryAs() {
     93     return reinterpret_cast<T>(shared_memory_address_);
     94   }
     95 
     96   template <typename T>
     97   T GetSharedMemoryAsWithOffset(uint32 offset) {
     98     void* ptr = reinterpret_cast<int8*>(shared_memory_address_) + offset;
     99     return reinterpret_cast<T>(ptr);
    100   }
    101 
    102   IdAllocatorInterface* GetIdAllocator(GLuint namespace_id) {
    103     return group_->GetIdAllocator(namespace_id);
    104   }
    105 
    106   Buffer* GetBuffer(GLuint service_id) {
    107     return group_->buffer_manager()->GetBuffer(service_id);
    108   }
    109 
    110   Framebuffer* GetFramebuffer(GLuint service_id) {
    111     return group_->framebuffer_manager()->GetFramebuffer(service_id);
    112   }
    113 
    114   Renderbuffer* GetRenderbuffer(
    115       GLuint service_id) {
    116     return group_->renderbuffer_manager()->GetRenderbuffer(service_id);
    117   }
    118 
    119   TextureRef* GetTexture(GLuint client_id) {
    120     return group_->texture_manager()->GetTexture(client_id);
    121   }
    122 
    123   Shader* GetShader(GLuint client_id) {
    124     return group_->shader_manager()->GetShader(client_id);
    125   }
    126 
    127   Program* GetProgram(GLuint client_id) {
    128     return group_->program_manager()->GetProgram(client_id);
    129   }
    130 
    131   QueryManager::Query* GetQueryInfo(GLuint client_id) {
    132     return decoder_->GetQueryManager()->GetQuery(client_id);
    133   }
    134 
    135   // This name doesn't match the underlying function, but doing it this way
    136   // prevents the need to special-case the unit test generation
    137   VertexAttribManager* GetVertexArrayInfo(GLuint client_id) {
    138     return decoder_->GetVertexArrayManager()->GetVertexAttribManager(client_id);
    139   }
    140 
    141   ProgramManager* program_manager() {
    142     return group_->program_manager();
    143   }
    144 
    145   void DoCreateProgram(GLuint client_id, GLuint service_id);
    146   void DoCreateShader(GLenum shader_type, GLuint client_id, GLuint service_id);
    147 
    148   void SetBucketAsCString(uint32 bucket_id, const char* str);
    149 
    150   void set_memory_tracker(MemoryTracker* memory_tracker) {
    151     memory_tracker_ = memory_tracker;
    152   }
    153 
    154   struct InitState {
    155     InitState();
    156 
    157     std::string extensions;
    158     std::string gl_version;
    159     bool has_alpha;
    160     bool has_depth;
    161     bool has_stencil;
    162     bool request_alpha;
    163     bool request_depth;
    164     bool request_stencil;
    165     bool bind_generates_resource;
    166     bool lose_context_when_out_of_memory;
    167     bool use_native_vao;  // default is true.
    168   };
    169 
    170   void InitDecoder(const InitState& init);
    171   void InitDecoderWithCommandLine(const InitState& init,
    172                                   const base::CommandLine* command_line);
    173 
    174   void ResetDecoder();
    175 
    176   const ContextGroup& group() const {
    177     return *group_.get();
    178   }
    179 
    180   ::testing::StrictMock< ::gfx::MockGLInterface>* GetGLMock() const {
    181     return gl_.get();
    182   }
    183 
    184   GLES2Decoder* GetDecoder() const {
    185     return decoder_.get();
    186   }
    187 
    188   typedef TestHelper::AttribInfo AttribInfo;
    189   typedef TestHelper::UniformInfo UniformInfo;
    190 
    191   void SetupShader(
    192       AttribInfo* attribs, size_t num_attribs,
    193       UniformInfo* uniforms, size_t num_uniforms,
    194       GLuint client_id, GLuint service_id,
    195       GLuint vertex_shader_client_id, GLuint vertex_shader_service_id,
    196       GLuint fragment_shader_client_id, GLuint fragment_shader_service_id);
    197 
    198   void SetupInitCapabilitiesExpectations();
    199   void SetupInitStateExpectations();
    200   void ExpectEnableDisable(GLenum cap, bool enable);
    201 
    202   // Setups up a shader for testing glUniform.
    203   void SetupShaderForUniform(GLenum uniform_type);
    204   void SetupDefaultProgram();
    205   void SetupCubemapProgram();
    206   void SetupSamplerExternalProgram();
    207   void SetupTexture();
    208 
    209   // Note that the error is returned as GLint instead of GLenum.
    210   // This is because there is a mismatch in the types of GLenum and
    211   // the error values GL_NO_ERROR, GL_INVALID_ENUM, etc. GLenum is
    212   // typedef'd as unsigned int while the error values are defined as
    213   // integers. This is problematic for template functions such as
    214   // EXPECT_EQ that expect both types to be the same.
    215   GLint GetGLError();
    216 
    217   void DoBindBuffer(GLenum target, GLuint client_id, GLuint service_id);
    218   void DoBindFramebuffer(GLenum target, GLuint client_id, GLuint service_id);
    219   void DoBindRenderbuffer(GLenum target, GLuint client_id, GLuint service_id);
    220   void DoBindTexture(GLenum target, GLuint client_id, GLuint service_id);
    221   void DoBindVertexArrayOES(GLuint client_id, GLuint service_id);
    222 
    223   bool DoIsBuffer(GLuint client_id);
    224   bool DoIsFramebuffer(GLuint client_id);
    225   bool DoIsProgram(GLuint client_id);
    226   bool DoIsRenderbuffer(GLuint client_id);
    227   bool DoIsShader(GLuint client_id);
    228   bool DoIsTexture(GLuint client_id);
    229 
    230   void DoDeleteBuffer(GLuint client_id, GLuint service_id);
    231   void DoDeleteFramebuffer(
    232       GLuint client_id, GLuint service_id,
    233       bool reset_draw, GLenum draw_target, GLuint draw_id,
    234       bool reset_read, GLenum read_target, GLuint read_id);
    235   void DoDeleteProgram(GLuint client_id, GLuint service_id);
    236   void DoDeleteRenderbuffer(GLuint client_id, GLuint service_id);
    237   void DoDeleteShader(GLuint client_id, GLuint service_id);
    238   void DoDeleteTexture(GLuint client_id, GLuint service_id);
    239 
    240   void DoCompressedTexImage2D(
    241       GLenum target, GLint level, GLenum format,
    242       GLsizei width, GLsizei height, GLint border,
    243       GLsizei size, uint32 bucket_id);
    244   void DoTexImage2D(
    245       GLenum target, GLint level, GLenum internal_format,
    246       GLsizei width, GLsizei height, GLint border,
    247       GLenum format, GLenum type,
    248       uint32 shared_memory_id, uint32 shared_memory_offset);
    249   void DoTexImage2DConvertInternalFormat(
    250       GLenum target, GLint level, GLenum requested_internal_format,
    251       GLsizei width, GLsizei height, GLint border,
    252       GLenum format, GLenum type,
    253       uint32 shared_memory_id, uint32 shared_memory_offset,
    254       GLenum expected_internal_format);
    255   void DoRenderbufferStorage(
    256       GLenum target, GLenum internal_format, GLenum actual_format,
    257       GLsizei width, GLsizei height, GLenum error);
    258   void DoFramebufferRenderbuffer(
    259       GLenum target,
    260       GLenum attachment,
    261       GLenum renderbuffer_target,
    262       GLuint renderbuffer_client_id,
    263       GLuint renderbuffer_service_id,
    264       GLenum error);
    265   void DoFramebufferTexture2D(
    266       GLenum target, GLenum attachment, GLenum tex_target,
    267       GLuint texture_client_id, GLuint texture_service_id,
    268       GLint level, GLenum error);
    269   void DoVertexAttribPointer(
    270       GLuint index, GLint size, GLenum type, GLsizei stride, GLuint offset);
    271   void DoVertexAttribDivisorANGLE(GLuint index, GLuint divisor);
    272 
    273   void DoEnableDisable(GLenum cap, bool enable);
    274 
    275   void DoEnableVertexAttribArray(GLint index);
    276 
    277   void DoBufferData(GLenum target, GLsizei size);
    278 
    279   void DoBufferSubData(
    280       GLenum target, GLint offset, GLsizei size, const void* data);
    281 
    282   void SetupVertexBuffer();
    283   void SetupAllNeededVertexBuffers();
    284 
    285   void SetupIndexBuffer();
    286 
    287   void DeleteVertexBuffer();
    288 
    289   void DeleteIndexBuffer();
    290 
    291   void SetupClearTextureExpectations(
    292       GLuint service_id,
    293       GLuint old_service_id,
    294       GLenum bind_target,
    295       GLenum target,
    296       GLint level,
    297       GLenum internal_format,
    298       GLenum format,
    299       GLenum type,
    300       GLsizei width,
    301       GLsizei height);
    302 
    303   void SetupExpectationsForRestoreClearState(
    304       GLclampf restore_red,
    305       GLclampf restore_green,
    306       GLclampf restore_blue,
    307       GLclampf restore_alpha,
    308       GLuint restore_stencil,
    309       GLclampf restore_depth,
    310       bool restore_scissor_test);
    311 
    312   void SetupExpectationsForFramebufferClearing(
    313       GLenum target,
    314       GLuint clear_bits,
    315       GLclampf restore_red,
    316       GLclampf restore_green,
    317       GLclampf restore_blue,
    318       GLclampf restore_alpha,
    319       GLuint restore_stencil,
    320       GLclampf restore_depth,
    321       bool restore_scissor_test);
    322 
    323   void SetupExpectationsForFramebufferClearingMulti(
    324       GLuint read_framebuffer_service_id,
    325       GLuint draw_framebuffer_service_id,
    326       GLenum target,
    327       GLuint clear_bits,
    328       GLclampf restore_red,
    329       GLclampf restore_green,
    330       GLclampf restore_blue,
    331       GLclampf restore_alpha,
    332       GLuint restore_stencil,
    333       GLclampf restore_depth,
    334       bool restore_scissor_test);
    335 
    336   void SetupExpectationsForDepthMask(bool mask);
    337   void SetupExpectationsForEnableDisable(GLenum cap, bool enable);
    338   void SetupExpectationsForColorMask(bool red,
    339                                      bool green,
    340                                      bool blue,
    341                                      bool alpha);
    342   void SetupExpectationsForStencilMask(uint32 front_mask,
    343                                        uint32 back_mask);
    344 
    345   void SetupExpectationsForApplyingDirtyState(
    346       bool framebuffer_is_rgb,
    347       bool framebuffer_has_depth,
    348       bool framebuffer_has_stencil,
    349       GLuint color_bits,  // NOTE! bits are 0x1000, 0x0100, 0x0010, and 0x0001
    350       bool depth_mask,
    351       bool depth_enabled,
    352       GLuint front_stencil_mask,
    353       GLuint back_stencil_mask,
    354       bool stencil_enabled);
    355 
    356   void SetupExpectationsForApplyingDefaultDirtyState();
    357 
    358   void AddExpectationsForSimulatedAttrib0WithError(
    359       GLsizei num_vertices, GLuint buffer_id, GLenum error);
    360 
    361   void AddExpectationsForSimulatedAttrib0(
    362       GLsizei num_vertices, GLuint buffer_id);
    363 
    364   void AddExpectationsForGenVertexArraysOES();
    365   void AddExpectationsForDeleteVertexArraysOES();
    366   void AddExpectationsForDeleteBoundVertexArraysOES();
    367   void AddExpectationsForBindVertexArrayOES();
    368   void AddExpectationsForRestoreAttribState(GLuint attrib);
    369 
    370   GLvoid* BufferOffset(unsigned i) {
    371     return static_cast<int8 *>(NULL)+(i);
    372   }
    373 
    374   template <typename Command, typename Result>
    375   bool IsObjectHelper(GLuint client_id) {
    376     Result* result = static_cast<Result*>(shared_memory_address_);
    377     Command cmd;
    378     cmd.Init(client_id, kSharedMemoryId, kSharedMemoryOffset);
    379     EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
    380     bool isObject = static_cast<bool>(*result);
    381     EXPECT_EQ(GL_NO_ERROR, GetGLError());
    382     return isObject;
    383   }
    384 
    385  protected:
    386   static const int kBackBufferWidth = 128;
    387   static const int kBackBufferHeight = 64;
    388 
    389   static const GLint kMaxTextureSize = 2048;
    390   static const GLint kMaxCubeMapTextureSize = 256;
    391   static const GLint kNumVertexAttribs = 16;
    392   static const GLint kNumTextureUnits = 8;
    393   static const GLint kMaxTextureImageUnits = 8;
    394   static const GLint kMaxVertexTextureImageUnits = 2;
    395   static const GLint kMaxFragmentUniformVectors = 16;
    396   static const GLint kMaxVaryingVectors = 8;
    397   static const GLint kMaxVertexUniformVectors = 128;
    398   static const GLint kMaxViewportWidth = 8192;
    399   static const GLint kMaxViewportHeight = 8192;
    400 
    401   static const GLint kViewportX = 0;
    402   static const GLint kViewportY = 0;
    403   static const GLint kViewportWidth = kBackBufferWidth;
    404   static const GLint kViewportHeight = kBackBufferHeight;
    405 
    406   static const GLuint kServiceAttrib0BufferId = 801;
    407   static const GLuint kServiceFixedAttribBufferId = 802;
    408 
    409   static const GLuint kServiceBufferId = 301;
    410   static const GLuint kServiceFramebufferId = 302;
    411   static const GLuint kServiceRenderbufferId = 303;
    412   static const GLuint kServiceTextureId = 304;
    413   static const GLuint kServiceProgramId = 305;
    414   static const GLuint kServiceShaderId = 306;
    415   static const GLuint kServiceElementBufferId = 308;
    416   static const GLuint kServiceQueryId = 309;
    417   static const GLuint kServiceVertexArrayId = 310;
    418 
    419   static const int32 kSharedMemoryId = 401;
    420   static const size_t kSharedBufferSize = 2048;
    421   static const uint32 kSharedMemoryOffset = 132;
    422   static const int32 kInvalidSharedMemoryId = 402;
    423   static const uint32 kInvalidSharedMemoryOffset = kSharedBufferSize + 1;
    424   static const uint32 kInitialResult = 0xBDBDBDBDu;
    425   static const uint8 kInitialMemoryValue = 0xBDu;
    426 
    427   static const uint32 kNewClientId = 501;
    428   static const uint32 kNewServiceId = 502;
    429   static const uint32 kInvalidClientId = 601;
    430 
    431   static const GLuint kServiceVertexShaderId = 321;
    432   static const GLuint kServiceFragmentShaderId = 322;
    433 
    434   static const GLuint kServiceCopyTextureChromiumShaderId = 701;
    435   static const GLuint kServiceCopyTextureChromiumProgramId = 721;
    436 
    437   static const GLuint kServiceCopyTextureChromiumTextureBufferId = 751;
    438   static const GLuint kServiceCopyTextureChromiumVertexBufferId = 752;
    439   static const GLuint kServiceCopyTextureChromiumFBOId = 753;
    440   static const GLuint kServiceCopyTextureChromiumPositionAttrib = 761;
    441   static const GLuint kServiceCopyTextureChromiumTexAttrib = 762;
    442   static const GLuint kServiceCopyTextureChromiumSamplerLocation = 763;
    443 
    444   static const GLsizei kNumVertices = 100;
    445   static const GLsizei kNumIndices = 10;
    446   static const int kValidIndexRangeStart = 1;
    447   static const int kValidIndexRangeCount = 7;
    448   static const int kInvalidIndexRangeStart = 0;
    449   static const int kInvalidIndexRangeCount = 7;
    450   static const int kOutOfRangeIndexRangeEnd = 10;
    451   static const GLuint kMaxValidIndex = 7;
    452 
    453   static const GLint kMaxAttribLength = 10;
    454   static const char* kAttrib1Name;
    455   static const char* kAttrib2Name;
    456   static const char* kAttrib3Name;
    457   static const GLint kAttrib1Size = 1;
    458   static const GLint kAttrib2Size = 1;
    459   static const GLint kAttrib3Size = 1;
    460   static const GLint kAttrib1Location = 0;
    461   static const GLint kAttrib2Location = 1;
    462   static const GLint kAttrib3Location = 2;
    463   static const GLenum kAttrib1Type = GL_FLOAT_VEC4;
    464   static const GLenum kAttrib2Type = GL_FLOAT_VEC2;
    465   static const GLenum kAttrib3Type = GL_FLOAT_VEC3;
    466   static const GLint kInvalidAttribLocation = 30;
    467   static const GLint kBadAttribIndex = kNumVertexAttribs;
    468 
    469   static const GLint kMaxUniformLength = 12;
    470   static const char* kUniform1Name;
    471   static const char* kUniform2Name;
    472   static const char* kUniform3Name;
    473   static const GLint kUniform1Size = 1;
    474   static const GLint kUniform2Size = 3;
    475   static const GLint kUniform3Size = 2;
    476   static const GLint kUniform1RealLocation = 3;
    477   static const GLint kUniform2RealLocation = 10;
    478   static const GLint kUniform2ElementRealLocation = 12;
    479   static const GLint kUniform3RealLocation = 20;
    480   static const GLint kUniform1FakeLocation = 0;               // These are
    481   static const GLint kUniform2FakeLocation = 1;               // hardcoded
    482   static const GLint kUniform2ElementFakeLocation = 0x10001;  // to match
    483   static const GLint kUniform3FakeLocation = 2;               // ProgramManager.
    484   static const GLint kUniform1DesiredLocation = -1;
    485   static const GLint kUniform2DesiredLocation = -1;
    486   static const GLint kUniform3DesiredLocation = -1;
    487   static const GLenum kUniform1Type = GL_SAMPLER_2D;
    488   static const GLenum kUniform2Type = GL_INT_VEC2;
    489   static const GLenum kUniform3Type = GL_FLOAT_VEC3;
    490   static const GLenum kUniformSamplerExternalType = GL_SAMPLER_EXTERNAL_OES;
    491   static const GLenum kUniformCubemapType = GL_SAMPLER_CUBE;
    492   static const GLint kInvalidUniformLocation = 30;
    493   static const GLint kBadUniformIndex = 1000;
    494 
    495   // Use StrictMock to make 100% sure we know how GL will be called.
    496   scoped_ptr< ::testing::StrictMock< ::gfx::MockGLInterface> > gl_;
    497   scoped_refptr<gfx::GLSurfaceStub> surface_;
    498   scoped_refptr<gfx::GLContextStubWithExtensions> context_;
    499   scoped_ptr<MockGLES2Decoder> mock_decoder_;
    500   scoped_ptr<GLES2Decoder> decoder_;
    501   MemoryTracker* memory_tracker_;
    502 
    503   GLuint client_buffer_id_;
    504   GLuint client_framebuffer_id_;
    505   GLuint client_program_id_;
    506   GLuint client_renderbuffer_id_;
    507   GLuint client_shader_id_;
    508   GLuint client_texture_id_;
    509   GLuint client_element_buffer_id_;
    510   GLuint client_vertex_shader_id_;
    511   GLuint client_fragment_shader_id_;
    512   GLuint client_query_id_;
    513   GLuint client_vertexarray_id_;
    514 
    515   uint32 shared_memory_id_;
    516   uint32 shared_memory_offset_;
    517   void* shared_memory_address_;
    518   void* shared_memory_base_;
    519 
    520   int8 immediate_buffer_[256];
    521 
    522   const bool ignore_cached_state_for_test_;
    523   bool cached_color_mask_red_;
    524   bool cached_color_mask_green_;
    525   bool cached_color_mask_blue_;
    526   bool cached_color_mask_alpha_;
    527   bool cached_depth_mask_;
    528   uint32 cached_stencil_front_mask_;
    529   uint32 cached_stencil_back_mask_;
    530 
    531   struct EnableFlags {
    532     EnableFlags();
    533     bool cached_blend;
    534     bool cached_cull_face;
    535     bool cached_depth_test;
    536     bool cached_dither;
    537     bool cached_polygon_offset_fill;
    538     bool cached_sample_alpha_to_coverage;
    539     bool cached_sample_coverage;
    540     bool cached_scissor_test;
    541     bool cached_stencil_test;
    542   };
    543 
    544   EnableFlags enable_flags_;
    545 
    546  private:
    547   class MockCommandBufferEngine : public CommandBufferEngine {
    548    public:
    549     MockCommandBufferEngine();
    550 
    551     virtual ~MockCommandBufferEngine();
    552 
    553     virtual scoped_refptr<gpu::Buffer> GetSharedMemoryBuffer(int32 shm_id)
    554         OVERRIDE;
    555 
    556     void ClearSharedMemory() {
    557       memset(valid_buffer_->memory(), kInitialMemoryValue, kSharedBufferSize);
    558     }
    559 
    560     virtual void set_token(int32 token) OVERRIDE;
    561 
    562     virtual bool SetGetBuffer(int32 /* transfer_buffer_id */) OVERRIDE;
    563 
    564     // Overridden from CommandBufferEngine.
    565     virtual bool SetGetOffset(int32 offset) OVERRIDE;
    566 
    567     // Overridden from CommandBufferEngine.
    568     virtual int32 GetGetOffset() OVERRIDE;
    569 
    570    private:
    571     scoped_refptr<gpu::Buffer> valid_buffer_;
    572     scoped_refptr<gpu::Buffer> invalid_buffer_;
    573   };
    574 
    575   // MockGLStates is used to track GL states and emulate driver
    576   // behaviors on top of MockGLInterface.
    577   class MockGLStates {
    578    public:
    579     MockGLStates()
    580         : bound_array_buffer_object_(0),
    581           bound_vertex_array_object_(0) {
    582     }
    583 
    584     ~MockGLStates() {
    585     }
    586 
    587     void OnBindArrayBuffer(GLuint id) {
    588       bound_array_buffer_object_ = id;
    589     }
    590 
    591     void OnBindVertexArrayOES(GLuint id) {
    592       bound_vertex_array_object_ = id;
    593     }
    594 
    595     void OnVertexAttribNullPointer() {
    596       // When a vertex array object is bound, some drivers (AMD Linux,
    597       // Qualcomm, etc.) have a bug where it incorrectly generates an
    598       // GL_INVALID_OPERATION on glVertexAttribPointer() if pointer
    599       // is NULL, no buffer is bound on GL_ARRAY_BUFFER.
    600       // Make sure we don't trigger this bug.
    601       if (bound_vertex_array_object_ != 0)
    602         EXPECT_TRUE(bound_array_buffer_object_ != 0);
    603     }
    604 
    605    private:
    606     GLuint bound_array_buffer_object_;
    607     GLuint bound_vertex_array_object_;
    608   };  // class MockGLStates
    609 
    610   void AddExpectationsForVertexAttribManager();
    611   void SetupMockGLBehaviors();
    612 
    613   scoped_ptr< ::testing::StrictMock<MockCommandBufferEngine> > engine_;
    614   scoped_refptr<ContextGroup> group_;
    615   MockGLStates gl_states_;
    616 };
    617 
    618 class GLES2DecoderWithShaderTestBase : public GLES2DecoderTestBase {
    619  public:
    620   GLES2DecoderWithShaderTestBase()
    621       : GLES2DecoderTestBase() {
    622   }
    623 
    624  protected:
    625   virtual void SetUp() OVERRIDE;
    626   virtual void TearDown() OVERRIDE;
    627 
    628 };
    629 
    630 // SpecializedSetup specializations that are needed in multiple unittest files.
    631 template <>
    632 void GLES2DecoderTestBase::SpecializedSetup<cmds::LinkProgram, 0>(bool valid);
    633 
    634 }  // namespace gles2
    635 }  // namespace gpu
    636 
    637 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_BASE_H_
    638