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// Copyright 2016 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.
#ifndef GL_GLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#endif
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <GLES2/gl2extchromium.h>
#include "base/command_line.h"
#include "base/strings/string_number_conversions.h"
#include "build/build_config.h"
#include "gpu/command_buffer/tests/gl_manager.h"
#include "gpu/command_buffer/tests/gl_test_utils.h"
#include "gpu/config/gpu_switches.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace gpu {
#if defined(OS_MACOSX)
// A test that exercises the glReadPixels workaround for IOSurface backed
// textures.
class GLIOSurfaceReadbackWorkaroundTest : public testing::Test {
public:
GLIOSurfaceReadbackWorkaroundTest() {}
protected:
void SetUp() override {
base::CommandLine command_line(0, NULL);
gl_.InitializeWithCommandLine(GLManager::Options(), command_line);
gl_.set_use_iosurface_memory_buffers(true);
}
void TearDown() override {
GLTestHelper::CheckGLError("no errors", __LINE__);
gl_.Destroy();
}
GLManager gl_;
};
TEST_F(GLIOSurfaceReadbackWorkaroundTest, ReadPixels) {
int width = 1;
int height = 1;
GLuint source_texture = 0;
GLenum source_target = GL_TEXTURE_RECTANGLE_ARB;
glGenTextures(1, &source_texture);
glBindTexture(source_target, source_texture);
glTexParameteri(source_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(source_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
GLuint image_id = glCreateGpuMemoryBufferImageCHROMIUM(
width, height, GL_RGBA, GL_READ_WRITE_CHROMIUM);
ASSERT_NE(0u, image_id);
glBindTexImage2DCHROMIUM(source_target, image_id);
GLuint framebuffer = 0;
glGenFramebuffers(1, &framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
glFramebufferTexture2D(
GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, source_target, source_texture, 0);
EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_COMPLETE),
glCheckFramebufferStatus(GL_FRAMEBUFFER));
glClearColor(33.0 / 255.0, 44.0 / 255.0, 55.0 / 255.0, 66.0 / 255.0);
glClear(GL_COLOR_BUFFER_BIT);
const uint8_t expected[4] = {33, 44, 55, 66};
EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 1 /* tolerance */, expected,
nullptr));
glClearColor(14.0 / 255.0, 15.0 / 255.0, 16.0 / 255.0, 17.0 / 255.0);
glClear(GL_COLOR_BUFFER_BIT);
const uint8_t expected2[4] = {14, 15, 16, 17};
EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 1 /* tolerance */,
expected2, nullptr));
glReleaseTexImage2DCHROMIUM(source_target, image_id);
glDestroyImageCHROMIUM(image_id);
glDeleteTextures(1, &source_texture);
glDeleteFramebuffers(1, &framebuffer);
}
#endif // defined(OS_MACOSX)
} // namespace gpu
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