Handle GLES2::ConsumeTextureCHROMIUM consuming the currently bound texture.

gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/command_line.h"
@@ skipping 3249 matching lines @@
   EXPECT_EQ(2, width);
   EXPECT_EQ(4, height);
   EXPECT_TRUE(texture->GetLevelType(GL_TEXTURE_2D, 1, &type, &internal_format));
   EXPECT_EQ(static_cast<GLenum>(GL_RGBA), internal_format);
   EXPECT_EQ(static_cast<GLenum>(GL_UNSIGNED_BYTE), type);
 
   // Service ID is restored.
   EXPECT_EQ(kServiceTextureId, texture->service_id());
 }
 
+TEST_P(GLES2DecoderTest, ConsumeAlreadyBoundTexture) {
+  Mailbox mailbox = Mailbox::Generate();
+
+  DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 3, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0,
+               0);
+
+  TextureRef* texture_ref1 =
+      group().texture_manager()->GetTexture(client_texture_id_);
+
+  ProduceTextureCHROMIUMImmediate& produce_cmd =
+      *GetImmediateAs<ProduceTextureCHROMIUMImmediate>();
+  produce_cmd.Init(GL_TEXTURE_2D, mailbox.name);
+  EXPECT_EQ(error::kNoError,
+            ExecuteImmediateCmd(produce_cmd, sizeof(mailbox.name)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+
+  // Consume texture that is already bound.  Operation should succeed, leaving
+  // existing texture bound with no extra GL calls expected.
+  ConsumeTextureCHROMIUMImmediate& consume_cmd =
+      *GetImmediateAs<ConsumeTextureCHROMIUMImmediate>();
+  consume_cmd.Init(GL_TEXTURE_2D, mailbox.name);
+  EXPECT_EQ(error::kNoError,
+            ExecuteImmediateCmd(consume_cmd, sizeof(mailbox.name)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+
+  TextureRef* texture_ref2 =
+      group().texture_manager()->GetTexture(client_texture_id_);
+
+  EXPECT_EQ(texture_ref1, texture_ref2);
+}
+
 TEST_P(GLES2DecoderTest, ProduceAndConsumeDirectTextureCHROMIUM) {
   Mailbox mailbox = Mailbox::Generate();
 
   DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
   DoTexImage2D(
       GL_TEXTURE_2D, 0, GL_RGBA, 3, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0, 0);
   DoTexImage2D(
       GL_TEXTURE_2D, 1, GL_RGBA, 2, 4, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0, 0);
   TextureRef* texture_ref =
       group().texture_manager()->GetTexture(client_texture_id_);
@@ skipping 1513 matching lines @@
 // TODO(gman): CompressedTexSubImage2DImmediate
 
 // TODO(gman): TexImage2D
 
 // TODO(gman): TexImage2DImmediate
 
 // TODO(gman): TexSubImage2DImmediate
 
 }  // namespace gles2
 }  // namespace gpu