Add texture swizzle back to command buffer.

gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
index 67e71bd4ce143b09407ba5419e5e2fe924d53c05..266869dfdb44b51bf0aeddbf1500af73cfd029b4 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
@@ -4720,6 +4720,68 @@ TEST_P(GLES2DecoderTest, BindTextureInvalidArgs) {
   EXPECT_EQ(GL_INVALID_ENUM, GetGLError());
 }
 
+TEST_P(GLES3DecoderTest, TexSwizzleAllowed) {
+  const GLenum kTarget = GL_TEXTURE_2D;
+  const GLenum kSwizzleParam = GL_TEXTURE_SWIZZLE_R;
+  const GLenum kSwizzleValue = GL_BLUE;
+  const GLenum kInvalidSwizzleValue = GL_RG;
+
+  {
+    EXPECT_CALL(*gl_, TexParameteri(kTarget, kSwizzleParam, kSwizzleValue));
+    TexParameteri cmd;
+    cmd.Init(kTarget, kSwizzleParam, kSwizzleValue);
+    EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+    EXPECT_EQ(GL_NO_ERROR, GetGLError());
+  }
+
+  {
+    TexParameteri cmd;
+    cmd.Init(kTarget, kSwizzleParam, kInvalidSwizzleValue);
+    EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+    EXPECT_EQ(GL_INVALID_ENUM, GetGLError());
+  }
+
+  {
+    EXPECT_CALL(*gl_, GetError())
+        .WillOnce(Return(GL_NO_ERROR))
+        .WillOnce(Return(GL_NO_ERROR))
+        .RetiresOnSaturation();
+    typedef GetTexParameteriv::Result Result;
+    Result* result = static_cast<Result*>(shared_memory_address_);
+    result->size = 0;
+    GetTexParameteriv cmd;
+    cmd.Init(kTarget, kSwizzleParam, shared_memory_id_, shared_memory_offset_);
+    EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+    EXPECT_EQ(decoder_->GetGLES2Util()->GLGetNumValuesReturned(kSwizzleParam),
+              result->GetNumResults());
+    EXPECT_EQ(GL_NO_ERROR, GetGLError());
+    EXPECT_EQ(kSwizzleValue, static_cast<GLenum>(result->GetData()[0]));
+  }
+}
+
+TEST_P(WebGL2DecoderTest, TexSwizzleDisabled) {
+  const GLenum kTarget = GL_TEXTURE_2D;
+  const GLenum kSwizzleParam = GL_TEXTURE_SWIZZLE_R;
+  const GLenum kSwizzleValue = GL_BLUE;
+
+  {
+    TexParameteri cmd;
+    cmd.Init(kTarget, kSwizzleParam, kSwizzleValue);
+    EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+    EXPECT_EQ(GL_INVALID_ENUM, GetGLError());
+  }
+
+  {
+    typedef GetTexParameteriv::Result Result;
+    Result* result = static_cast<Result*>(shared_memory_address_);
+    result->size = 0;
+    GetTexParameteriv cmd;
+    cmd.Init(kTarget, kSwizzleParam, shared_memory_id_, shared_memory_offset_);
+    EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+    EXPECT_EQ(GL_INVALID_ENUM, GetGLError());
+  }
+}
+
 // TODO(gman): Complete this test.
 // TEST_P(GLES2DecoderTest, CompressedTexImage2DGLError) {
 // }