Reset TexImage2D base level to workaround Intel mac driver bug

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 212a64fe4facafbba2e5ec7f65e877a30d316abb..314610c4538dd728eb52f4390a6d98583a407604 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
@@ -4718,6 +4718,66 @@ TEST_P(GLES2DecoderTest, TestDiscardableTextureBindGeneratesUnlocked) {
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
 
+// Test texture base level is set before texImage2D when workaround
+// RESET_TEXIMAGE2D_BASE_LEVEL is enabled
+TEST_P(GLES3DecoderManualInitTest, SetTextureBaseLevelBeforeTexImage2D) {
+  base::CommandLine command_line(0, nullptr);
+  command_line.AppendSwitchASCII(
+      switches::kGpuDriverBugWorkarounds,
+      base::IntToString(gpu::SET_ZERO_LEVEL_BEFORE_GENERATING_MIPMAP) + "," +
+          base::IntToString(gpu::RESET_TEXIMAGE2D_BASE_LEVEL));
+  InitState init;
+  init.gl_version = "OpenGL ES 3.0";
+  init.bind_generates_resource = true;
+  init.context_type = CONTEXT_TYPE_OPENGLES3;
+  InitDecoderWithCommandLine(init, &command_line);
+
+  EXPECT_CALL(*gl_, GenerateMipmapEXT(_)).Times(0);
+  GLint base_level = 2;
+  DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
+  DoTexImage2D(GL_TEXTURE_2D, base_level, GL_RGBA, 2, 2, 0, GL_RGBA,
+               GL_UNSIGNED_BYTE, 0, 0);
+  SetupClearTextureExpectations(kServiceTextureId, kServiceTextureId,
+                                GL_TEXTURE_2D, GL_TEXTURE_2D, base_level,
+                                GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, 0, 0, 2, 2);
+  DoTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+  DoTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+  DoTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, base_level);
+  EXPECT_CALL(*gl_, TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA,
+                               GL_UNSIGNED_BYTE, nullptr))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_,
+              TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, base_level))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, GenerateMipmapEXT(GL_TEXTURE_2D))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 0, GL_RGBA,
+                               GL_UNSIGNED_BYTE, nullptr))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_,
+              TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, base_level))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, GetError())
+      .WillOnce(Return(GL_NO_ERROR))
+      .WillOnce(Return(GL_NO_ERROR))
+      .RetiresOnSaturation();
+  GenerateMipmap cmd;
+  cmd.Init(GL_TEXTURE_2D);
+  EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+}
+
 // TODO(gman): Complete this test.
 // TEST_P(GLES2DecoderTest, CompressedTexImage2DGLError) {
 // }