blob: fc254dc2c1dd6188d3d84c7124fa1dc6c9692587 [file] [log] [blame]
// Copyright 2016 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/gl/gl_surface_osmesa_win.h"
#include <memory>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/trace_event/trace_event.h"
#include "base/win/windows_version.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_surface_egl.h"
#include "ui/gl/gl_surface_wgl.h"
#include "ui/gl/vsync_provider_win.h"
// From ANGLE's egl/eglext.h.
#if !defined(EGL_D3D11_ELSE_D3D9_DISPLAY_ANGLE)
namespace gl {
// Use BGRA, because StretchDIBits from RGBA causes later PrintWindow or
// BitBlt from the HWND to return all 0s, which causes the snapshot mechanism
// not to work.
GLSurfaceOSMesaWin::GLSurfaceOSMesaWin(gfx::AcceleratedWidget window)
: GLSurfaceOSMesa(GLSurfaceFormat(GLSurfaceFormat::PIXEL_LAYOUT_BGRA),
gfx::Size(1, 1)),
device_context_(NULL) {
GLSurfaceOSMesaWin::~GLSurfaceOSMesaWin() {
bool GLSurfaceOSMesaWin::Initialize(GLSurfaceFormat format) {
if (!GLSurfaceOSMesa::Initialize(format))
return false;
device_context_ = GetDC(window_);
return true;
void GLSurfaceOSMesaWin::Destroy() {
if (window_ && device_context_)
ReleaseDC(window_, device_context_);
device_context_ = NULL;
bool GLSurfaceOSMesaWin::IsOffscreen() {
return false;
gfx::SwapResult GLSurfaceOSMesaWin::SwapBuffers(
const PresentationCallback& callback) {
gfx::Size size = GetSize();
return PostSubBuffer(0, 0, size.width(), size.height(), callback);
bool GLSurfaceOSMesaWin::SupportsPostSubBuffer() {
return true;
gfx::SwapResult GLSurfaceOSMesaWin::PostSubBuffer(
int x,
int y,
int width,
int height,
const PresentationCallback& callback) {
// TODO(penghuang): Provide useful presentation feedback.
gfx::Size size = GetSize();
// Note: negating the height below causes GDI to treat the bitmap data as row
// 0 being at the top.
info.bV4Width = size.width();
info.bV4Height = -size.height();
info.bV4Planes = 1;
info.bV4BitCount = 32;
info.bV4V4Compression = BI_BITFIELDS;
info.bV4RedMask = 0x00FF0000;
info.bV4GreenMask = 0x0000FF00;
info.bV4BlueMask = 0x000000FF;
info.bV4AlphaMask = 0xFF000000;
// Copy the back buffer to the window's device context. Do not check whether
// StretchDIBits succeeds or not. It will fail if the window has been
// destroyed but it is preferable to allow rendering to silently fail if the
// window is destroyed. This is because the primary application of this
// class of GLContext is for testing and we do not want every GL related ui /
// browser test to become flaky if there is a race condition between GL
// context destruction and window destruction.
StretchDIBits(device_context_, x, size.height() - y - height, width, height,
x, y, width, height, GetHandle(),
reinterpret_cast<BITMAPINFO*>(&info), DIB_RGB_COLORS, SRCCOPY);
return gfx::SwapResult::SWAP_ACK;
} // namespace gl