command_buffer: Add support for creating non-WebGL ES 3 contexts

gpu/command_buffer/tests/es3_misc_functions_unittest.cc

+// Copyright 2015 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 <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <GLES2/gl2extchromium.h>
+#include <GLES3/gl3.h>
+
+#include "base/command_line.h"
+#include "gpu/command_buffer/tests/gl_manager.h"
+#include "gpu/command_buffer/tests/gl_test_utils.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gl/gl_switches.h"
+
+#define SHADER_VERSION_300(Src) "#version 300 es\n" #Src
+
+namespace gpu {
+
+class OpenGLES3FunctionTest : public testing::Test {
+ protected:
+  void SetUp() override {
+    base::CommandLine command_line(*base::CommandLine::ForCurrentProcess());
+    command_line.AppendSwitch(switches::kEnableUnsafeES3APIs);
+    GLManager::Options options;
+    options.context_type = gles2::CONTEXT_TYPE_OPENGLES3;
+    gl_.InitializeWithCommandLine(options, &command_line);
+  }
+  void TearDown() override { gl_.Destroy(); }
+  bool IsApplicable() const { return gl_.IsInitialized(); }
+  GLManager gl_;
+};
+
+TEST_F(OpenGLES3FunctionTest, GetFragDataLocationInvalid) {
+  if (!IsApplicable()) {
+    return;
+  }
+  // clang-format off
+  static const char* kVertexShader =
+      SHADER_VERSION_300(
+          in vec4 position;
+          void main() {
+            gl_Position = position;
+          });
+  static const char* kFragColorShader =
+      SHADER_VERSION_300(
+          precision mediump float;
+          uniform vec4 src;
+          out vec4 FragColor;
+          void main() {
+            FragColor = src;
+          });
+  // clang-format on
+
+  GLuint vsid = GLTestHelper::LoadShader(GL_VERTEX_SHADER, kVertexShader);
+  GLuint fsid = GLTestHelper::LoadShader(GL_FRAGMENT_SHADER, kFragColorShader);
+  GLuint program = glCreateProgram();
+  glAttachShader(program, vsid);
+  glAttachShader(program, fsid);
+  glDeleteShader(vsid);
+  glDeleteShader(fsid);
+
+  GLint location = glGetFragDataLocation(program, "FragColor");
+  EXPECT_EQ(static_cast<GLenum>(GL_INVALID_OPERATION), glGetError());
+  EXPECT_EQ(-1, location);
+  location = glGetFragDataLocation(program, "Unknown");
+  EXPECT_EQ(static_cast<GLenum>(GL_INVALID_OPERATION), glGetError());
+  EXPECT_EQ(-1, location);
+
+  glLinkProgram(program);
+
+  location = glGetFragDataLocation(program, "FragColor");
+  EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
+  EXPECT_EQ(0, location);
+  location = glGetFragDataLocation(program, "Unknown");
+  EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
+  EXPECT_EQ(-1, location);
+
+  glDeleteProgram(program);
+}
+
+}  // namespace gpu