Implement support for rendering to 32-bit float textures on ES3

gpu/command_buffer/service/test_helper.cc

Index: gpu/command_buffer/service/test_helper.cc
diff --git a/gpu/command_buffer/service/test_helper.cc b/gpu/command_buffer/service/test_helper.cc
index 92c5ec456ef78ca6ff2d1ab6a0b922c224bf3bf3..c164eea9d92c9cae1743be4653728179738014e5 100644
--- a/gpu/command_buffer/service/test_helper.cc
+++ b/gpu/command_buffer/service/test_helper.cc
@@ -227,16 +227,20 @@ void TestHelper::SetupTextureManagerDestructionExpectations(
 void TestHelper::SetupContextGroupInitExpectations(
       ::gfx::MockGLInterface* gl,
       const DisallowedFeatures& disallowed_features,
-      const char* extensions) {
+      const char* extensions,
+      const char* gl_version) {
   InSequence sequence;
 
-  SetupFeatureInfoInitExpectations(gl, extensions);
+  SetupFeatureInfoInitExpectationsWithGLVersion(gl, extensions, "", gl_version);
+
+  std::string l_version(StringToLowerASCII(std::string(gl_version)));
+  bool is_es3 = (l_version.substr(0, 12) == "opengl es 3.");
 
   EXPECT_CALL(*gl, GetIntegerv(GL_MAX_RENDERBUFFER_SIZE, _))
       .WillOnce(SetArgumentPointee<1>(kMaxRenderbufferSize))
       .RetiresOnSaturation();
   if (strstr(extensions, "GL_EXT_framebuffer_multisample") ||
-      strstr(extensions, "GL_EXT_multisampled_render_to_texture")) {
+      strstr(extensions, "GL_EXT_multisampled_render_to_texture") || is_es3) {
     EXPECT_CALL(*gl, GetIntegerv(GL_MAX_SAMPLES, _))
         .WillOnce(SetArgumentPointee<1>(kMaxSamples))
         .RetiresOnSaturation();
@@ -297,6 +301,78 @@ void TestHelper::SetupFeatureInfoInitExpectationsWithGLVersion(
   EXPECT_CALL(*gl, GetString(GL_VERSION))
       .WillOnce(Return(reinterpret_cast<const uint8*>(gl_version)))
       .RetiresOnSaturation();
+
+  std::string l_version(StringToLowerASCII(std::string(gl_version)));
+  bool is_es3 = (l_version.substr(0, 12) == "opengl es 3.");

[Ken Russell (switch to Gerrit), 2014/02/12 00:11:01]

This will be fragile if ES 4 ever comes out. Would be better to use
gfx::GLVersionInfo, and further, to add queries to it like "is_es3_or_later".

[oetuaho-nv, 2014/02/12 10:51:43]

This matches the ES3 check in feature_info.cc that was there prior to this
patch. But I agree that it would be good to change both.

+
+  if (strstr(extensions, "GL_ARB_texture_float") ||
+      (is_es3 && strstr(extensions, "GL_EXT_color_buffer_float"))) {
+    static const GLuint gl_ids[] = {101, 102};
+    const GLsizei width = 16;
+    EXPECT_CALL(*gl, GetIntegerv(GL_FRAMEBUFFER_BINDING, _))
+        .WillOnce(SetArgumentPointee<1>(gl_ids[0]))
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, GetIntegerv(GL_TEXTURE_BINDING_2D, _))
+        .WillOnce(SetArgumentPointee<1>(gl_ids[0]))
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, GenTextures(1, _))
+        .WillOnce(SetArrayArgument<1>(gl_ids + 1, gl_ids + 2))
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, GenFramebuffersEXT(1, _))
+        .WillOnce(SetArrayArgument<1>(gl_ids + 1, gl_ids + 2))
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, BindTexture(GL_TEXTURE_2D, gl_ids[1]))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+        GL_NEAREST))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, width, width, 0,
+        GL_RGBA, GL_FLOAT, _))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, BindFramebufferEXT(GL_FRAMEBUFFER, gl_ids[1]))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, FramebufferTexture2DEXT(GL_FRAMEBUFFER,
+        GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gl_ids[1], 0))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, CheckFramebufferStatusEXT(GL_FRAMEBUFFER))
+        .WillOnce(Return(GL_FRAMEBUFFER_COMPLETE))
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, TexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, width, width, 0,
+        GL_RGB, GL_FLOAT, _))
+        .Times(1)
+        .RetiresOnSaturation();
+    if (is_es3) {
+      EXPECT_CALL(*gl, CheckFramebufferStatusEXT(GL_FRAMEBUFFER))
+          .WillOnce(Return(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT))
+          .RetiresOnSaturation();
+    } else {
+      EXPECT_CALL(*gl, CheckFramebufferStatusEXT(GL_FRAMEBUFFER))
+          .WillOnce(Return(GL_FRAMEBUFFER_COMPLETE))
+          .RetiresOnSaturation();
+    }
+    EXPECT_CALL(*gl, DeleteFramebuffersEXT(1, _))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, DeleteTextures(1, _))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, BindFramebufferEXT(GL_FRAMEBUFFER, gl_ids[0]))
+        .Times(1)
+        .RetiresOnSaturation();
+    EXPECT_CALL(*gl, BindTexture(GL_TEXTURE_2D, gl_ids[0]))
+        .Times(1)
+        .RetiresOnSaturation();
+    if (DCHECK_IS_ON()) {
+      EXPECT_CALL(*gl, GetError())
+          .WillOnce(Return(GL_NO_ERROR))
+          .RetiresOnSaturation();
+    }
+  }
 }
 
 void TestHelper::SetupExpectationsForClearingUniforms(