Set default GL state

TEST=unit tests
BUG=130617

Review URL: https://chromiumcodereview.appspot.com/10573004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@142931 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 150 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 091b96b..7bc3b10 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -2263,6 +2263,45 @@ bool GLES2DecoderImpl::Initialize(
   viewport_max_width_ = viewport_params[0];
   viewport_max_height_ = viewport_params[1];
 
+  // Set all the default state because some GL drivers get it wrong.
+  glActiveTexture(GL_TEXTURE0 + active_texture_unit_);
+  glLineWidth(1.0);
+  EnableDisable(GL_BLEND, enable_blend_);
+  glBlendColor(0.0f, 0.0, 0.0f, 0.0f);
+  glBlendFunc(GL_ONE, GL_ZERO);
+  glBlendEquation(GL_ADD);
+  glBlendFuncSeparate(GL_ONE, GL_ZERO, GL_ONE, GL_ZERO);
+  glClearColor(clear_red_, clear_green_, clear_blue_, clear_alpha_);
+  glColorMask(mask_red_, mask_green_, mask_blue_, mask_alpha_);
+  EnableDisable(GL_CULL_FACE, enable_cull_face_);
+  glCullFace(GL_BACK);
+  glClearDepth(clear_depth_);
+  glDepthFunc(GL_LESS);
+  glDepthRange(0.0f, 1.0f);
+  EnableDisable(GL_DEPTH_TEST, enable_depth_test_);
+  glEnable(GL_DITHER);
+  glFrontFace(GL_CCW);
+  glHint(GL_GENERATE_MIPMAP_HINT, GL_DONT_CARE);
+  glLineWidth(1.0f);
+  glPixelStorei(GL_PACK_ALIGNMENT, pack_alignment_);
+  glPolygonOffset(0.0f, 0.0f);
+  glDisable(GL_POLYGON_OFFSET_FILL);
+  glSampleCoverage(1.0, false);
+  glScissor(viewport_x_, viewport_y_, viewport_width_, viewport_height_);
+  EnableDisable(GL_SCISSOR_TEST, enable_scissor_test_);
+  EnableDisable(GL_STENCIL_TEST, enable_stencil_test_);
+  glClearStencil(clear_stencil_);
+  glStencilFunc(GL_ALWAYS, 0, 0xFFFFFFFFU);
+  glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+  glStencilMaskSeparate(GL_FRONT, mask_stencil_front_);
+  glStencilMaskSeparate(GL_BACK, mask_stencil_back_);
+  glPixelStorei(GL_UNPACK_ALIGNMENT, unpack_alignment_);
+
+  DoBindBuffer(GL_ARRAY_BUFFER, 0);
+  DoBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+  DoBindFramebuffer(GL_FRAMEBUFFER, 0);
+  DoBindRenderbuffer(GL_RENDERBUFFER, 0);
+
   return true;
 }
 
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.cc
index 7de1375..b942e9d 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.cc
@@ -190,6 +190,117 @@ void GLES2DecoderTestBase::InitDecoder(
           max_viewport_dims, max_viewport_dims + arraysize(max_viewport_dims)))
       .RetiresOnSaturation();
 
+  EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, LineWidth(1.0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Disable(GL_BLEND))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BlendColor(0.0f, 0.0, 0.0f, 0.0f))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BlendFunc(GL_ONE, GL_ZERO))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BlendEquation(GL_ADD))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BlendFuncSeparate(GL_ONE, GL_ZERO, GL_ONE, GL_ZERO))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ClearColor(0.0f, 0.0, 0.0f, 0.0f))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ColorMask(true, true, true, true))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Disable(GL_CULL_FACE))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, CullFace(GL_BACK))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ClearDepth(1.0f))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, DepthFunc(GL_LESS))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, DepthRange(0.0f, 1.0f))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Disable(GL_DEPTH_TEST))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Enable(GL_DITHER))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, FrontFace(GL_CCW))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Hint(GL_GENERATE_MIPMAP_HINT, GL_DONT_CARE))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, LineWidth(1.0f))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, PixelStorei(GL_PACK_ALIGNMENT, 4))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, PolygonOffset(0.0f, 0.0f))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Disable(GL_POLYGON_OFFSET_FILL))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, SampleCoverage(1.0, false))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Scissor(
+      kViewportX, kViewportY, kViewportWidth, kViewportHeight))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Disable(GL_SCISSOR_TEST))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, Disable(GL_STENCIL_TEST))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, ClearStencil(0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, StencilFunc(GL_ALWAYS, 0, 0xFFFFFFFFU))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, StencilOp(GL_KEEP, GL_KEEP, GL_KEEP))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, StencilMaskSeparate(GL_FRONT, 0xFFFFFFFFU))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, StencilMaskSeparate(GL_BACK, 0xFFFFFFFFU))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, PixelStorei(GL_UNPACK_ALIGNMENT, 4))
+      .Times(1)
+      .RetiresOnSaturation();
+
+  EXPECT_CALL(*gl_, BindBuffer(GL_ARRAY_BUFFER, 0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BindFramebufferEXT(GL_FRAMEBUFFER, 0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, BindRenderbufferEXT(GL_RENDERBUFFER, 0))
+      .Times(1)
+      .RetiresOnSaturation();
+
   engine_.reset(new StrictMock<MockCommandBufferEngine>());
   Buffer buffer = engine_->GetSharedMemoryBuffer(kSharedMemoryId);
   shared_memory_offset_ = kSharedMemoryOffset;