During virtual context switches only restore texture units that have changed from the previous cont…

gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc

 // Copyright (c) 2012 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 "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
@@ skipping 8802 matching lines @@
   DiscardFramebufferEXTImmediate& cmd =
       *GetImmediateAs<DiscardFramebufferEXTImmediate>();
   cmd.Init(target, count, attachments);
 
   // Should not result into a call into GL.
   EXPECT_EQ(error::kNoError,
             ExecuteImmediateCmd(cmd, sizeof(attachments)));
   EXPECT_EQ(GL_INVALID_OPERATION, GetGLError());
 }
 
+TEST_F(GLES2DecoderManualInitTest, RestoreState) {
+  InitDecoder(
+      "",      // extensions
+      false,   // has alpha
+      false,   // has depth
+      false,   // has stencil
+      false,   // request alpha
+      false,   // request depth
+      false,   // request stencil
+      true);   // bind generates resource
+  SetupTexture();

[no sievers, 2013/12/20 17:37:07]

You could actually put the expectations in the right order and put
  InSequence sequence;

[kaanb, 2014/01/07 23:33:42]

Done.

+  // TODO(kaanb): do not hardcode size

[no sievers, 2013/12/20 17:37:07]

I think group().max_texture_units() is what you are looking for.

[kaanb, 2014/01/07 23:33:42]

Done.

+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE0))
+      .Times(2)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE1))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE2))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE3))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE4))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE5))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE6))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE7))
+      .Times(1)
+      .RetiresOnSaturation();
+
+  EXPECT_CALL(*gl_, BindTexture(GL_TEXTURE_2D, 304))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BindTexture(GL_TEXTURE_2D, 702))
+      .Times(7)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BindTexture(GL_TEXTURE_CUBE_MAP, 704))
+      .Times(8)
+      .RetiresOnSaturation();
+
+  GetDecoder()->RestoreAllTextureUnitBindings(NULL);
+}
+
 // TODO(gman): Complete this test.
 // TEST_F(GLES2DecoderTest, CompressedTexImage2DGLError) {
 // }
 
 // TODO(gman): BufferData
 
 // TODO(gman): BufferDataImmediate
 
 // TODO(gman): BufferSubData
 
@@ skipping 16 matching lines @@
 // TODO(gman): TexImage2DImmediate
 
 // TODO(gman): TexSubImage2DImmediate
 
 // TODO(gman): UseProgram
 
 // TODO(gman): SwapBuffers
 
 }  // namespace gles2
 }  // namespace gpu