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Diffstat (limited to 'base/gfx/platform_canvas_mac.cc')
| -rwxr-xr-x | base/gfx/platform_canvas_mac.cc | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/base/gfx/platform_canvas_mac.cc b/base/gfx/platform_canvas_mac.cc new file mode 100755 index 0000000..0344a0a --- /dev/null +++ b/base/gfx/platform_canvas_mac.cc @@ -0,0 +1,169 @@ +// 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_mac.h" + +#include "base/gfx/bitmap_platform_device_mac.h" +#include "base/logging.h" + +namespace gfx { + +PlatformCanvasMac::PlatformCanvasMac() : SkCanvas() { +} + +PlatformCanvasMac::PlatformCanvasMac(int width, int height, bool is_opaque) + : SkCanvas() { + initialize(width, height, is_opaque, NULL); +} + +PlatformCanvasMac::PlatformCanvasMac(int width, + int height, + bool is_opaque, + CGContextRef context) + : SkCanvas() { + initialize(width, height, is_opaque, context); +} + +PlatformCanvasMac::~PlatformCanvasMac() { +} + +void PlatformCanvasMac::initialize(int width, + int height, + bool is_opaque, + CGContextRef context) { + SkDevice* device = + createPlatformDevice(width, height, is_opaque, context); + setDevice(device); + device->unref(); // was created with refcount 1, and setDevice also refs +} + +CGContextRef PlatformCanvasMac::beginPlatformPaint() { + return getTopPlatformDevice().GetBitmapContext(); +} + +void PlatformCanvasMac::endPlatformPaint() { + // flushing will be done in onAccessBitmap +} + +PlatformDeviceMac& PlatformCanvasMac::getTopPlatformDevice() const { + // All of our devices should be our special PlatformDeviceMac. + SkCanvas::LayerIter iter(const_cast<PlatformCanvasMac*>(this), false); + return *static_cast<PlatformDeviceMac*>(iter.device()); +} + +// Clipping ------------------------------------------------------------------- + +bool PlatformCanvasMac::clipRect(const SkRect& rect, SkRegion::Op op) { + bool ret = SkCanvas::clipRect(rect, op); + getTopPlatformDevice().SetClipRegion(getTotalClip()); + return ret; +} + +bool PlatformCanvasMac::clipPath(const SkPath& path, SkRegion::Op op) { + bool ret = SkCanvas::clipPath(path, op); + getTopPlatformDevice().SetClipRegion(getTotalClip()); + return ret; +} + +bool PlatformCanvasMac::clipRegion(const SkRegion& deviceRgn, SkRegion::Op op) { + bool ret = SkCanvas::clipRegion(deviceRgn, op); + getTopPlatformDevice().SetClipRegion(getTotalClip()); + return ret; +} + +// Transforming --------------------------------------------------------------- + +bool PlatformCanvasMac::translate(SkScalar dx, SkScalar dy) { + if (!SkCanvas::translate(dx, dy)) + return false; + getTopPlatformDevice().SetTransform(getTotalMatrix()); + return true; +} + +bool PlatformCanvasMac::scale(SkScalar sx, SkScalar sy) { + if (!SkCanvas::scale(sx, sy)) + return false; + getTopPlatformDevice().SetTransform(getTotalMatrix()); + return true; +} + +int PlatformCanvasMac::saveLayer(const SkRect* bounds, + const SkPaint* paint, + SaveFlags flags) { + int result = SkCanvas::saveLayer(bounds, paint, flags); + + // saveLayer will have created a new device which, depending on the clip + // rect, may be smaller than the original layer. Therefore, it will have a + // transform applied, and we need to sync CG with that transform. + SkCanvas::LayerIter iter(this, false); + PlatformDeviceMac& new_device = + *static_cast<PlatformDeviceMac*>(iter.device()); + + // There man not actually be a new layer if the layer is empty. + if (!iter.done()) { + new_device.SetDeviceOffset(iter.x(), iter.y()); + new_device.SetTransform(getTotalMatrix()); + new_device.SetClipRegion(getTotalClip()); + } + return result; +} + +int PlatformCanvasMac::save(SkCanvas::SaveFlags flags) { + int ret = SkCanvas::save(flags); + PlatformDeviceMac& device = getTopPlatformDevice(); + device.SetTransform(getTotalMatrix()); + device.SetClipRegion(getTotalClip()); + return ret; +} + +void PlatformCanvasMac::restore() { + SkCanvas::restore(); + PlatformDeviceMac& device = getTopPlatformDevice(); + device.SetTransform(getTotalMatrix()); + device.SetClipRegion(getTotalClip()); +} + +SkDevice* PlatformCanvasMac::createDevice(SkBitmap::Config config, + int width, + int height, + bool is_opaque) { + DCHECK(config == SkBitmap::kARGB_8888_Config); + return createPlatformDevice(width, height, is_opaque, NULL); +} + +SkDevice* PlatformCanvasMac::createPlatformDevice(int width, + int height, + bool is_opaque, + CGContextRef context) { + SkDevice* device = BitmapPlatformDeviceMac::Create(context, width, height, + is_opaque); + return device; +} + +} // namespace gfx |