/usr/include/firefox/gfxUtils.h is in firefox-dev 11.0+build1-0ubuntu4.
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* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Robert O'Callahan <robert@ocallahan.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef GFX_UTILS_H
#define GFX_UTILS_H
#include "gfxTypes.h"
#include "gfxPattern.h"
#include "gfxImageSurface.h"
#include "ImageLayers.h"
#include "mozilla/gfx/2D.h"
class gfxDrawable;
class nsIntRegion;
struct nsIntRect;
class THEBES_API gfxUtils {
public:
/*
* Premultiply or Unpremultiply aSourceSurface, writing the result
* to aDestSurface or back into aSourceSurface if aDestSurface is null.
*
* If aDestSurface is given, it must have identical format, dimensions, and
* stride as the source.
*
* If the source is not ImageFormatARGB32, no operation is performed. If
* aDestSurface is given, the data is copied over.
*/
static void PremultiplyImageSurface(gfxImageSurface *aSourceSurface,
gfxImageSurface *aDestSurface = nsnull);
static void UnpremultiplyImageSurface(gfxImageSurface *aSurface,
gfxImageSurface *aDestSurface = nsnull);
/**
* Draw something drawable while working around limitations like bad support
* for EXTEND_PAD, lack of source-clipping, or cairo / pixman bugs with
* extreme user-space-to-image-space transforms.
*
* The input parameters here usually come from the output of our image
* snapping algorithm in nsLayoutUtils.cpp.
* This method is split from nsLayoutUtils::DrawPixelSnapped to allow for
* adjusting the parameters. For example, certain images with transparent
* margins only have a drawable subimage. For those images, imgFrame::Draw
* will tweak the rects and transforms that it gets from the pixel snapping
* algorithm before passing them on to this method.
*/
static void DrawPixelSnapped(gfxContext* aContext,
gfxDrawable* aDrawable,
const gfxMatrix& aUserSpaceToImageSpace,
const gfxRect& aSubimage,
const gfxRect& aSourceRect,
const gfxRect& aImageRect,
const gfxRect& aFill,
const gfxImageSurface::gfxImageFormat aFormat,
const gfxPattern::GraphicsFilter& aFilter);
/**
* Clip aContext to the region aRegion.
*/
static void ClipToRegion(gfxContext* aContext, const nsIntRegion& aRegion);
/**
* Clip aContext to the region aRegion, snapping the rectangles.
*/
static void ClipToRegionSnapped(gfxContext* aContext, const nsIntRegion& aRegion);
/**
* Create a path consisting of rectangles in |aRegion|.
*/
static void PathFromRegion(gfxContext* aContext, const nsIntRegion& aRegion);
/**
* Create a path consisting of rectangles in |aRegion|, snapping the rectangles.
*/
static void PathFromRegionSnapped(gfxContext* aContext, const nsIntRegion& aRegion);
/*
* Convert image format to depth value
*/
static int ImageFormatToDepth(gfxASurface::gfxImageFormat aFormat);
/**
* If aIn can be represented exactly using an nsIntRect (i.e.
* integer-aligned edges and coordinates in the PRInt32 range) then we
* set aOut to that rectangle, otherwise return failure.
*/
static bool GfxRectToIntRect(const gfxRect& aIn, nsIntRect* aOut);
/**
* Return the smallest power of kScaleResolution (2) greater than or equal to
* aVal.
*/
static gfxFloat ClampToScaleFactor(gfxFloat aVal);
/**
* Helper function for ConvertYCbCrToRGB that finds the
* RGB buffer size and format for given YCbCrImage.
* @param aSuggestedFormat will be set to ImageFormatRGB24
* if the desired format is not supported.
* @param aSuggestedSize will be set to the picture size from aData
* if either the suggested size was {0,0}
* or simultaneous scaling and conversion is not supported.
*/
static void
GetYCbCrToRGBDestFormatAndSize(const mozilla::layers::PlanarYCbCrImage::Data& aData,
gfxASurface::gfxImageFormat& aSuggestedFormat,
gfxIntSize& aSuggestedSize);
/**
* Convert YCbCrImage into RGB aDestBuffer
* Format and Size parameters must have
* been passed to GetYCbCrToRGBDestFormatAndSize
*/
static void
ConvertYCbCrToRGB(const mozilla::layers::PlanarYCbCrImage::Data& aData,
const gfxASurface::gfxImageFormat& aDestFormat,
const gfxIntSize& aDestSize,
unsigned char* aDestBuffer,
PRInt32 aStride);
#ifdef MOZ_DUMP_PAINTING
/**
* Writes a binary PNG file.
*/
static void WriteAsPNG(mozilla::gfx::DrawTarget* aDT, const char* aFile);
/**
* Write as a PNG encoded Data URL to stdout.
*/
static void DumpAsDataURL(mozilla::gfx::DrawTarget* aDT);
/**
* Copy a PNG encoded Data URL to the clipboard.
*/
static void CopyAsDataURL(mozilla::gfx::DrawTarget* aDT);
#endif
};
#endif
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