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// Copyright 2014 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 "ui/ozone/demo/surfaceless_gl_renderer.h"
#include <stddef.h>
#include "base/bind.h"
#include "base/macros.h"
#include "base/trace_event/trace_event.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_image.h"
#include "ui/gl/gl_image_ozone_native_pixmap.h"
#include "ui/gl/gl_surface.h"
#include "ui/ozone/public/ozone_platform.h"
#include "ui/ozone/public/surface_factory_ozone.h"
namespace ui {
SurfacelessGlRenderer::BufferWrapper::BufferWrapper() {
}
SurfacelessGlRenderer::BufferWrapper::~BufferWrapper() {
if (gl_fb_)
glDeleteFramebuffersEXT(1, &gl_fb_);
if (gl_tex_) {
image_->ReleaseTexImage(GL_TEXTURE_2D);
glDeleteTextures(1, &gl_tex_);
image_->Destroy(true);
}
}
bool SurfacelessGlRenderer::BufferWrapper::Initialize(
gfx::AcceleratedWidget widget,
const gfx::Size& size) {
glGenFramebuffersEXT(1, &gl_fb_);
glGenTextures(1, &gl_tex_);
scoped_refptr<NativePixmap> pixmap =
OzonePlatform::GetInstance()
->GetSurfaceFactoryOzone()
->CreateNativePixmap(widget, size, gfx::BufferFormat::BGRX_8888,
gfx::BufferUsage::SCANOUT);
scoped_refptr<gfx::GLImageOzoneNativePixmap> image(
new gfx::GLImageOzoneNativePixmap(size, GL_RGB));
if (!image->Initialize(pixmap.get(), gfx::BufferFormat::BGRX_8888)) {
LOG(ERROR) << "Failed to create GLImage";
return false;
}
image_ = image;
glBindFramebufferEXT(GL_FRAMEBUFFER, gl_fb_);
glBindTexture(GL_TEXTURE_2D, gl_tex_);
image_->BindTexImage(GL_TEXTURE_2D);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
gl_tex_, 0);
if (glCheckFramebufferStatusEXT(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
LOG(ERROR) << "Failed to create framebuffer "
<< glCheckFramebufferStatusEXT(GL_FRAMEBUFFER);
return false;
}
widget_ = widget;
size_ = size;
return true;
}
void SurfacelessGlRenderer::BufferWrapper::BindFramebuffer() {
glBindFramebufferEXT(GL_FRAMEBUFFER, gl_fb_);
}
SurfacelessGlRenderer::SurfacelessGlRenderer(
gfx::AcceleratedWidget widget,
const scoped_refptr<gfx::GLSurface>& surface,
const gfx::Size& size)
: GlRenderer(widget, surface, size), weak_ptr_factory_(this) {}
SurfacelessGlRenderer::~SurfacelessGlRenderer() {
// Need to make current when deleting the framebuffer resources allocated in
// the buffers.
context_->MakeCurrent(surface_.get());
}
bool SurfacelessGlRenderer::Initialize() {
if (!GlRenderer::Initialize())
return false;
for (size_t i = 0; i < arraysize(buffers_); ++i) {
buffers_[i].reset(new BufferWrapper());
if (!buffers_[i]->Initialize(widget_, size_))
return false;
}
PostRenderFrameTask(gfx::SwapResult::SWAP_ACK);
return true;
}
void SurfacelessGlRenderer::RenderFrame() {
TRACE_EVENT0("ozone", "SurfacelessGlRenderer::RenderFrame");
float fraction = NextFraction();
context_->MakeCurrent(surface_.get());
buffers_[back_buffer_]->BindFramebuffer();
glViewport(0, 0, size_.width(), size_.height());
glClearColor(1 - fraction, 0.0, fraction, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
surface_->ScheduleOverlayPlane(0, gfx::OVERLAY_TRANSFORM_NONE,
buffers_[back_buffer_]->image(),
gfx::Rect(size_), gfx::RectF(0, 0, 1, 1));
back_buffer_ ^= 1;
surface_->SwapBuffersAsync(
base::Bind(&SurfacelessGlRenderer::PostRenderFrameTask,
weak_ptr_factory_.GetWeakPtr()));
}
void SurfacelessGlRenderer::PostRenderFrameTask(gfx::SwapResult result) {
switch (result) {
case gfx::SwapResult::SWAP_NAK_RECREATE_BUFFERS:
for (size_t i = 0; i < arraysize(buffers_); ++i) {
buffers_[i].reset(new BufferWrapper());
if (!buffers_[i]->Initialize(widget_, size_))
LOG(FATAL) << "Failed to recreate buffer";
}
// Fall through since we want to render a new frame anyways.
case gfx::SwapResult::SWAP_ACK:
GlRenderer::PostRenderFrameTask(result);
break;
case gfx::SwapResult::SWAP_FAILED:
LOG(FATAL) << "Failed to swap buffers";
break;
}
}
} // namespace ui
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