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Diffstat (limited to 'base/gfx/platform_canvas.cc')
| -rw-r--r-- | base/gfx/platform_canvas.cc | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/base/gfx/platform_canvas.cc b/base/gfx/platform_canvas.cc new file mode 100644 index 0000000..a421069 --- /dev/null +++ b/base/gfx/platform_canvas.cc @@ -0,0 +1,105 @@ +// Copyright 2008, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include "base/gfx/platform_canvas.h" + +#include "base/gfx/bitmap_platform_device.h" +#include "base/logging.h" + +namespace gfx { + +PlatformCanvas::PlatformCanvas() : SkCanvas() { +} + +PlatformCanvas::PlatformCanvas(int width, int height, bool is_opaque) + : SkCanvas() { + initialize(width, height, is_opaque, NULL); +} + +PlatformCanvas::PlatformCanvas(int width, + int height, + bool is_opaque, + HANDLE shared_section) + : SkCanvas() { + initialize(width, height, is_opaque, shared_section); +} + +PlatformCanvas::~PlatformCanvas() { +} + +void PlatformCanvas::initialize(int width, + int height, + bool is_opaque, + HANDLE shared_section) { + SkDevice* device = + createPlatformDevice(width, height, is_opaque, shared_section); + setDevice(device); + device->unref(); // was created with refcount 1, and setDevice also refs +} + +HDC PlatformCanvas::beginPlatformPaint() { + return getTopPlatformDevice().getBitmapDC(); +} + +void PlatformCanvas::endPlatformPaint() { + // we don't clear the DC here since it will be likely to be used again + // flushing will be done in onAccessBitmap +} + +PlatformDevice& PlatformCanvas::getTopPlatformDevice() const { + // All of our devices should be our special PlatformDevice. + SkCanvas::LayerIter iter(const_cast<PlatformCanvas*>(this), false); + return *static_cast<PlatformDevice*>(iter.device()); +} + +SkDevice* PlatformCanvas::createDevice(SkBitmap::Config config, + int width, + int height, + bool is_opaque, bool isForLayer) { + DCHECK(config == SkBitmap::kARGB_8888_Config); + return createPlatformDevice(width, height, is_opaque, NULL); +} + +SkDevice* PlatformCanvas::createPlatformDevice(int width, + int height, + bool is_opaque, + HANDLE shared_section) { + HDC screen_dc = GetDC(NULL); + SkDevice* device = BitmapPlatformDevice::create(screen_dc, width, height, + is_opaque, shared_section); + ReleaseDC(NULL, screen_dc); + return device; +} + +SkDevice* PlatformCanvas::setBitmapDevice(const SkBitmap&) { + NOTREACHED(); + return NULL; +} + +} // namespace gfx
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