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// 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.
// This file defines tests that implementations of GLImage should pass in order
// to be conformant.
#ifndef UI_GL_TEST_GL_IMAGE_TEST_TEMPLATE_H_
#define UI_GL_TEST_GL_IMAGE_TEST_TEMPLATE_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/stringize_macros.h"
#include "base/strings/stringprintf.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/buffer_types.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_image.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/test/gl_image_test_support.h"
#include "ui/gl/test/gl_test_helper.h"
namespace gfx {
template <typename GLImageTestDelegate>
class GLImageTest : public testing::Test {
protected:
// Overridden from testing::Test:
void SetUp() override {
GLImageTestSupport::InitializeGL();
surface_ = GLSurface::CreateOffscreenGLSurface(Size());
context_ = GLContext::CreateGLContext(nullptr, surface_.get(),
PreferIntegratedGpu);
context_->MakeCurrent(surface_.get());
}
void TearDown() override {
context_->ReleaseCurrent(surface_.get());
context_ = nullptr;
surface_ = nullptr;
GLImageTestSupport::CleanupGL();
}
protected:
scoped_refptr<GLSurface> surface_;
scoped_refptr<GLContext> context_;
GLImageTestDelegate delegate_;
};
TYPED_TEST_CASE_P(GLImageTest);
// Copy image to texture. Support is optional. Texels should be updated if
// supported, and left unchanged if not.
TYPED_TEST_P(GLImageTest, CopyTexSubImage) {
const Size image_size(256, 256);
const uint8_t image_color[] = {0, 0xff, 0, 0xff};
const uint8_t texture_color[] = {0, 0, 0xff, 0xff};
GLuint framebuffer =
GLTestHelper::SetupFramebuffer(image_size.width(), image_size.height());
ASSERT_TRUE(framebuffer);
glBindFramebufferEXT(GL_FRAMEBUFFER, framebuffer);
glViewport(0, 0, image_size.width(), image_size.height());
// Create a solid color green image of preferred format. This must succeed
// in order for a GLImage to be conformant.
scoped_refptr<GLImage> image = this->delegate_.CreateSolidColorImage(
image_size, GLImageTestSupport::GetPreferredInternalFormat(),
GLImageTestSupport::GetPreferredBufferFormat(), image_color);
ASSERT_TRUE(image);
// Create a solid color blue texture of the same size as |image|.
GLuint texture = GLTestHelper::CreateTexture(GL_TEXTURE_2D);
scoped_ptr<uint8_t[]> pixels(new uint8_t[BufferSizeForBufferFormat(
image_size, GLImageTestSupport::GetPreferredBufferFormat())]);
GLImageTestSupport::SetBufferDataToColor(
image_size.width(), image_size.height(),
static_cast<int>(RowSizeForBufferFormat(
image_size.width(), GLImageTestSupport::GetPreferredBufferFormat(),
0)),
GLImageTestSupport::GetPreferredBufferFormat(), texture_color,
pixels.get());
// Note: This test assume that |image| can be used with GL_TEXTURE_2D but
// that might not be the case for some GLImage implementations.
glBindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D, 0,
GLImageTestSupport::GetPreferredInternalFormat(),
image_size.width(), image_size.height(), 0,
GLImageTestSupport::GetPreferredInternalFormat(),
GL_UNSIGNED_BYTE, pixels.get());
// Attempt to copy |image| to |texture|.
// Returns true on success, false on failure.
bool rv = image->CopyTexSubImage(GL_TEXTURE_2D, Point(), Rect(image_size));
// clang-format off
const char kVertexShader[] = STRINGIZE(
attribute vec2 a_position;
attribute vec2 a_texCoord;
varying vec2 v_texCoord;
void main() {
gl_Position = vec4(a_position.x, a_position.y, 0.0, 1.0);
v_texCoord = a_texCoord;
}
);
const char kFragmentShader[] = STRINGIZE(
uniform sampler2D a_texture;
varying vec2 v_texCoord;
void main() {
gl_FragColor = texture2D(a_texture, v_texCoord);
}
);
const char kShaderFloatPrecision[] = STRINGIZE(
precision mediump float;
);
// clang-format on
GLuint vertex_shader =
GLTestHelper::LoadShader(GL_VERTEX_SHADER, kVertexShader);
bool is_gles = GetGLImplementation() == kGLImplementationEGLGLES2;
GLuint fragment_shader = GLTestHelper::LoadShader(
GL_FRAGMENT_SHADER,
base::StringPrintf("%s%s", is_gles ? kShaderFloatPrecision : "",
kFragmentShader)
.c_str());
GLuint program = GLTestHelper::SetupProgram(vertex_shader, fragment_shader);
EXPECT_NE(program, 0u);
glUseProgram(program);
GLint sampler_location = glGetUniformLocation(program, "a_texture");
ASSERT_NE(sampler_location, -1);
glUniform1i(sampler_location, 0);
// clang-format off
static GLfloat vertices[] = {
-1.f, -1.f, 0.f, 0.f,
1.f, -1.f, 1.f, 0.f,
-1.f, 1.f, 0.f, 1.f,
1.f, 1.f, 1.f, 1.f
};
// clang-format on
GLuint vertex_buffer;
glGenBuffersARB(1, &vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
GLint position_location = glGetAttribLocation(program, "a_position");
ASSERT_NE(position_location, -1);
glEnableVertexAttribArray(position_location);
glVertexAttribPointer(position_location, 2, GL_FLOAT, GL_FALSE,
sizeof(GLfloat) * 4, 0);
GLint tex_coord_location = glGetAttribLocation(program, "a_texCoord");
EXPECT_NE(tex_coord_location, -1);
glEnableVertexAttribArray(tex_coord_location);
glVertexAttribPointer(tex_coord_location, 2, GL_FLOAT, GL_FALSE,
sizeof(GLfloat) * 4,
reinterpret_cast<void*>(sizeof(GLfloat) * 2));
// Draw |texture| to viewport and read back pixels to check expectations.
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
GLTestHelper::CheckPixels(0, 0, image_size.width(), image_size.height(),
rv ? image_color : texture_color);
// Clean up.
glDeleteProgram(program);
glDeleteShader(vertex_shader);
glDeleteShader(fragment_shader);
glDeleteBuffersARB(1, &vertex_buffer);
glDeleteTextures(1, &texture);
glDeleteFramebuffersEXT(1, &framebuffer);
image->Destroy(true);
}
// The GLImageTest test case verifies behaviour that is expected from a
// GLImage in order to be conformant.
REGISTER_TYPED_TEST_CASE_P(GLImageTest, CopyTexSubImage);
} // namespace gfx
#endif // UI_GL_TEST_GL_IMAGE_TEST_TEMPLATE_H_
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