blob: 6f7277e3afe162ad731c2e4e4847be7e1e2a0135 [file] [log] [blame]
// Copyright (c) 2006-2008 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 "skia/ext/bitmap_platform_device_linux.h"
#include <cairo/cairo.h>
namespace skia {
// -----------------------------------------------------------------------------
// These objects are reference counted and own a Cairo surface. The surface is
// the backing store for a Skia bitmap and we reference count it so that we can
// copy BitmapPlatformDeviceLinux objects without having to copy all the image
// data.
// -----------------------------------------------------------------------------
class BitmapPlatformDeviceLinux::BitmapPlatformDeviceLinuxData
: public base::RefCounted<BitmapPlatformDeviceLinuxData> {
explicit BitmapPlatformDeviceLinuxData(cairo_surface_t* surface)
: surface_(surface) { }
cairo_surface_t* surface() const { return surface_; }
cairo_surface_t *const surface_;
friend class base::RefCounted<BitmapPlatformDeviceLinuxData>;
~BitmapPlatformDeviceLinuxData() {
// Disallow copy & assign.
BitmapPlatformDeviceLinuxData(const BitmapPlatformDeviceLinuxData&);
BitmapPlatformDeviceLinuxData& operator=(
const BitmapPlatformDeviceLinuxData&);
// We use this static factory function instead of the regular constructor so
// that we can create the pixel data before calling the constructor. This is
// required so that we can call the base class' constructor with the pixel
// data.
BitmapPlatformDeviceLinux* BitmapPlatformDeviceLinux::Create(
int width, int height, bool is_opaque) {
cairo_surface_t* surface =
width, height);
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height,
#ifndef NDEBUG
if (is_opaque) {
bitmap.eraseARGB(255, 0, 255, 128); // bright bluish green
// The device object will take ownership of the graphics context.
return new BitmapPlatformDeviceLinux
(bitmap, new BitmapPlatformDeviceLinuxData(surface));
// The device will own the bitmap, which corresponds to also owning the pixel
// data. Therefore, we do not transfer ownership to the SkDevice's bitmap.
const SkBitmap& bitmap,
BitmapPlatformDeviceLinuxData* data)
: PlatformDeviceLinux(bitmap),
data_(data) {
const BitmapPlatformDeviceLinux& other)
: PlatformDeviceLinux(const_cast<BitmapPlatformDeviceLinux&>(
data_(other.data_) {
BitmapPlatformDeviceLinux::~BitmapPlatformDeviceLinux() {
cairo_surface_t* BitmapPlatformDeviceLinux::surface() const {
return data_->surface();
BitmapPlatformDeviceLinux& BitmapPlatformDeviceLinux::operator=(
const BitmapPlatformDeviceLinux& other) {
data_ = other.data_;
return *this;
} // namespace skia