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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/vr/test/gl_test_environment.h"
#include "base/run_loop.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/command_buffer/client/gles2_lib.h"
#include "gpu/command_buffer/client/shared_memory_limits.h"
#include "gpu/command_buffer/common/context_creation_attribs.h"
#include "gpu/ipc/gl_in_process_context.h"
#include "gpu/ipc/test_gpu_thread_holder.h"
namespace {
GLuint CreateTexture(GLenum target) {
// Create the texture object.
GLuint texture = 0;
glGenTextures(1, &texture);
glBindTexture(target, texture);
glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
return texture;
}
GLuint SetupFramebuffer(int width, int height) {
GLuint color_buffer_texture = CreateTexture(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, color_buffer_texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,
GL_UNSIGNED_BYTE, nullptr);
GLuint framebuffer = 0;
glGenFramebuffers(1, &framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
color_buffer_texture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
DCHECK_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_COMPLETE),
glCheckFramebufferStatus(GL_FRAMEBUFFER))
<< "Error setting up framebuffer";
glDeleteFramebuffers(1, &framebuffer);
framebuffer = 0;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDeleteTextures(1, &color_buffer_texture);
return framebuffer;
}
} // namespace
namespace vr {
GlTestEnvironment::GlTestEnvironment(const gfx::Size frame_buffer_size) {
gpu::ContextCreationAttribs attributes;
attributes.bind_generates_resource = false;
context_ = std::make_unique<gpu::GLInProcessContext>();
auto result =
context_->Initialize(gpu::GetTestGpuThreadHolder()->GetTaskExecutor(),
attributes, gpu::SharedMemoryLimits());
DCHECK_EQ(result, gpu::ContextResult::kSuccess);
gles2::SetGLContext(context_->GetImplementation());
// To avoid glGetVertexAttribiv(0, ...) failing.
glGenVertexArraysOES(1, &vao_);
glBindVertexArrayOES(vao_);
frame_buffer_ =
SetupFramebuffer(frame_buffer_size.width(), frame_buffer_size.height());
glBindFramebuffer(GL_FRAMEBUFFER, frame_buffer_);
}
GlTestEnvironment::~GlTestEnvironment() {
glDeleteFramebuffers(1, &frame_buffer_);
if (vao_) {
glDeleteVertexArraysOES(1, &vao_);
}
}
GLuint GlTestEnvironment::GetFrameBufferForTesting() {
return frame_buffer_;
}
GLuint GlTestEnvironment::CreateTexture(GLenum target) {
return ::CreateTexture(target);
}
} // namespace vr
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