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- // Copyright (c) 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 <stdint.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 GLBGRAMipMapTest : public testing::Test {
- protected:
- void SetUp() override { gl_.Initialize(GLManager::Options()); }
- void TearDown() override { gl_.Destroy(); }
- GLManager gl_;
- };
- // Test to ensure that using GL_BGRA as a texture internal format does
- // not hinder the use of mipmaps. Support for GL_BGRA as an internal format
- // is required by ES 2.0 (internal format must be equal to external format),
- // but some desktop GL implementations may not fully support the use of
- // GL_BGRA. For example, Mesa+Intel does not support mipmapping on textures
- // that use the GL_BGRA internal format. This test verifies a workaround.
- TEST_F(GLBGRAMipMapTest, GenerateMipmapsSucceeds) {
- static const int kWidth = 100;
- static const int kHeight = 50;
- uint8_t pixels[kWidth * kHeight * 4];
- GLuint tex = 0;
- glGenTextures(1, &tex);
- glBindTexture(GL_TEXTURE_2D, tex);
- memset(pixels, 128, sizeof(pixels));
- glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, kWidth, kHeight, 0,
- GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
- EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
- // Without the workaround, the following call generates a
- // GL_INVALID_OPERATION error on some desktop GL implementations
- glGenerateMipmap(GL_TEXTURE_2D);
- EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
- }
- } // namespace gpu
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