<rdar://problem/10912680> Pixel access canvas APIs do not operate at backing store...

<rdar://problem/10912680> Pixel access canvas APIs do not operate at backing store resolution
https://bugs.webkit.org/show_bug.cgi?id=83836

Reviewed by Darin Adler.

Source/WebCore:

Test: fast/canvas/2d.imageDataHD.html

Added getImageDataHD and putImageDataHD functions to CanvasRenderingContext2D, as proposed in
<http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2012-March/035112.html>. The functions
are prefixed with “webkit” for now.

* html/canvas/CanvasRenderingContext2D.cpp:
(WebCore::CanvasRenderingContext2D::getImageData): Added this cover function that calls
through to getImageData with LogicalCoordinateSystem.
(WebCore::CanvasRenderingContext2D::webkitGetImageDataHD): Added. Calls through to
getImageData with BackingStoreCoordinateSystem.
(WebCore::CanvasRenderingContext2D::getImageData): Added a CoordinateSystem parameter to this
now-private function. It is passed through to ImageBuffer::getUnmultipliedImageData().
(WebCore::CanvasRenderingContext2D::putImageData): Added this cover function that calls
through to putImageData with LogicalCoordinateSystem.
(WebCore::CanvasRenderingContext2D::webkitPutImageDataHD): Added. Calls through to
putImageData with BackingStoreCoordinateSystem.
(WebCore::CanvasRenderingContext2D::putImageData): Added a CoordinateSystem parameter to this
function. It is passed through to ImageBuffer::putByteArray, and used to compute the rect to
invalidate after the drawing operation.
* html/canvas/CanvasRenderingContext2D.h:
* html/canvas/CanvasRenderingContext2D.idl: Added webkitPutImageDataHD() and
webkitGetImageDataHD().
* platform/graphics/ImageBuffer.h: Added a CoordinateSystem enum with the values
LogicalCoordinateSystem and BackingStoreCoordinateSystem. Added a CoordinateSystem parameter,
which defaults to LogicalCoordinateSystem, to getUnmultipliedImageData,
getPremultipliedImageData, and putByteArray.
* platform/graphics/cairo/ImageBufferCairo.cpp:
(WebCore::ImageBuffer::getUnmultipliedImageData):
(WebCore::ImageBuffer::getPremultipliedImageData):
(WebCore::ImageBuffer::putByteArray):
(WebCore::ImageBuffer::toDataURL):
* platform/graphics/cg/ImageBufferCG.cpp:
(WebCore::ImageBuffer::getUnmultipliedImageData): Now uses the CoordinateSystem parameter to
decide whether to ask ImageBufferDaya::getData() to apply the resolution scale or not.
(WebCore::ImageBuffer::getPremultipliedImageData): Ditto.
(WebCore::ImageBuffer::putByteArray): Now uses the CoordinateSystem parameter to decide
whether to maintain the resolution scale while drawing or not.
(WebCore::ImageBuffer::toDataURL):
* platform/graphics/gtk/ImageBufferGtk.cpp:
(WebCore::ImageBuffer::toDataURL):
* platform/graphics/qt/ImageBufferQt.cpp:
(WebCore::ImageBuffer::getUnmultipliedImageData):
(WebCore::ImageBuffer::getPremultipliedImageData):
(WebCore::ImageBuffer::putByteArray):
(WebCore::ImageBuffer::toDataURL):
* platform/graphics/skia/ImageBufferSkia.cpp:
(WebCore::ImageBuffer::getUnmultipliedImageData):
(WebCore::ImageBuffer::getPremultipliedImageData):
(WebCore::ImageBuffer::putByteArray):
(WebCore::ImageBuffer::toDataURL):
* platform/graphics/wince/ImageBufferWinCE.cpp:
(WebCore::ImageBuffer::getUnmultipliedImageData):
(WebCore::ImageBuffer::getPremultipliedImageData):
(WebCore::ImageBuffer::putByteArray):
(WebCore::ImageBuffer::toDataURL):
* platform/graphics/wx/ImageBufferWx.cpp:
(WebCore::ImageBuffer::getUnmultipliedImageData):
(WebCore::ImageBuffer::getPremultipliedImageData):
(WebCore::ImageBuffer::putByteArray):
(WebCore::ImageBuffer::toDataURL):

LayoutTests:

* fast/canvas/2d.imageDataHD-expected.txt: Added.
* fast/canvas/2d.imageDataHD.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@114150 268f45cc-cd09-0410-ab3c-d52691b4dbfc