1 files changed, 94 insertions, 0 deletions
diff --git a/skia/ext/bitmap_platform_device_linux.cc b/skia/ext/bitmap_platform_device_linux.cc
new file mode 100644
index 0000000..4dd322d
--- /dev/null
+++ b/skia/ext/bitmap_platform_device_linux.cc
@@ -0,0 +1,94 @@
+// 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>
+
+#include "base/logging.h"
+
+namespace gfx {
+
+// -----------------------------------------------------------------------------
+// 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> {
+ public:
+  explicit BitmapPlatformDeviceLinuxData(cairo_surface_t* surface)
+      : surface_(surface) { }
+
+  cairo_surface_t* surface() const { return surface_; }
+
+ protected:
+  cairo_surface_t *const surface_;
+
+  friend class base::RefCounted<BitmapPlatformDeviceLinuxData>;
+  ~BitmapPlatformDeviceLinuxData() {
+    cairo_surface_destroy(surface_);
+  }
+
+  DISALLOW_EVIL_CONSTRUCTORS(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 =
+      cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
+                                 width, height);
+
+  SkBitmap bitmap;
+  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height,
+                   cairo_image_surface_get_stride(surface));
+  bitmap.setPixels(cairo_image_surface_get_data(surface));
+  bitmap.setIsOpaque(is_opaque);
+
+#ifndef NDEBUG
+  if (is_opaque) {
+    bitmap.eraseARGB(255, 0, 255, 128);  // bright bluish green
+  }
+#endif
+
+  // 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.
+BitmapPlatformDeviceLinux::BitmapPlatformDeviceLinux(
+    const SkBitmap& bitmap,
+    BitmapPlatformDeviceLinuxData* data)
+    : PlatformDeviceLinux(bitmap),
+      data_(data) {
+}
+
+BitmapPlatformDeviceLinux::BitmapPlatformDeviceLinux(
+    const BitmapPlatformDeviceLinux& other)
+    : PlatformDeviceLinux(const_cast<BitmapPlatformDeviceLinux&>(
+                          other).accessBitmap(true)),
+      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 gfx