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// Copyright 2015 The Chromium Authors
// 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 <stdint.h>
#include "base/compiler_specific.h"
#include "gpu/command_buffer/tests/gl_manager.h"
#include "gpu/command_buffer/tests/gl_test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace gpu {
// A collection of tests that exercise the GL_EXT_srgb extension.
class GLEXTSRGBTest : public testing::Test {
protected:
void SetUp() override { gl_.Initialize(GLManager::Options()); }
void TearDown() override { gl_.Destroy(); }
bool IsApplicable() const {
return GLTestHelper::HasExtension("GL_EXT_sRGB");
}
GLManager gl_;
};
// Test to ensure that GL_SRGB_ALPHA as glTex(Sub)Image2D parameter works. This
// is tricky because GL_SRGB_ALPHA is valid in OpenGL ES 2.0 but not valid in
// OpenGL.
TEST_F(GLEXTSRGBTest, TexImageSRGBALPHAFormat) {
if (!IsApplicable())
return;
static const int kWidth = 10;
static const int kHeight = 10;
static const int kSubImageX = kWidth / 2;
static const int kSubImageY = kHeight / 2;
static const int kSubImageWidth = kWidth / 2;
static const int kSubImageHeight = kHeight / 2;
static const uint8_t kImageColor[] = {255, 255, 255, 255};
static const uint8_t kSubImageColor[] = {128, 128, 128, 128};
uint8_t pixels[kWidth * kHeight * 4];
GLuint tex = 0;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
UNSAFE_TODO(memset(pixels, kImageColor[0], sizeof(pixels)));
glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB_ALPHA_EXT, kWidth, kHeight, 0,
GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, pixels);
EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
UNSAFE_TODO(memset(pixels, kSubImageColor[0], sizeof(pixels)));
glTexSubImage2D(GL_TEXTURE_2D, 0, kSubImageX, kSubImageY, kSubImageWidth,
kSubImageHeight, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, pixels);
EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
glBindTexture(GL_TEXTURE_2D, 0);
GLuint fbo = 0;
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
tex, 0);
EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_COMPLETE),
glCheckFramebufferStatus(GL_FRAMEBUFFER));
GLTestHelper::CheckPixels(0, 0, kSubImageX, kHeight, 0, kImageColor, nullptr);
GLTestHelper::CheckPixels(0, 0, kWidth, kSubImageY, 0, kImageColor, nullptr);
GLTestHelper::CheckPixels(kSubImageX, kSubImageY, kSubImageWidth,
kSubImageHeight, 0, kSubImageColor, nullptr);
}
} // namespace gpu
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