gecko-dev/gfx/thebes/gfxUtils.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2012-05-21 11:12:37 +00:00
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef GFX_UTILS_H
#define GFX_UTILS_H
#include "gfxColor.h"
#include "gfxTypes.h"
#include "GraphicsFilter.h"
#include "imgIContainer.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/RefPtr.h"
#include "nsColor.h"
#include "nsPrintfCString.h"
class gfxASurface;
class gfxDrawable;
class nsIntRegion;
class nsIPresShell;
struct nsIntRect;
namespace mozilla {
namespace layers {
struct PlanarYCbCrData;
}
namespace image {
class ImageRegion;
}
}
class gfxUtils {
public:
typedef mozilla::gfx::DataSourceSurface DataSourceSurface;
typedef mozilla::gfx::DrawTarget DrawTarget;
typedef mozilla::gfx::IntPoint IntPoint;
typedef mozilla::gfx::Matrix Matrix;
typedef mozilla::gfx::SourceSurface SourceSurface;
typedef mozilla::gfx::SurfaceFormat SurfaceFormat;
typedef mozilla::image::ImageRegion ImageRegion;
/*
* 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 gfxImageFormat::ARGB32, no operation is performed. If
* aDestSurface is given, the data is copied over.
*/
static bool PremultiplyDataSurface(DataSourceSurface* srcSurf,
DataSourceSurface* destSurf);
static bool UnpremultiplyDataSurface(DataSourceSurface* srcSurf,
DataSourceSurface* destSurf);
static mozilla::TemporaryRef<DataSourceSurface>
CreatePremultipliedDataSurface(DataSourceSurface* srcSurf);
static mozilla::TemporaryRef<DataSourceSurface>
CreateUnpremultipliedDataSurface(DataSourceSurface* srcSurf);
static void ConvertBGRAtoRGBA(uint8_t* aData, uint32_t aLength);
/**
* 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 gfxSize& aImageSize,
const ImageRegion& aRegion,
const mozilla::gfx::SurfaceFormat aFormat,
GraphicsFilter aFilter,
uint32_t aImageFlags = imgIContainer::FLAG_NONE,
gfxFloat aOpacity = 1.0);
/**
* Clip aContext to the region aRegion.
*/
static void ClipToRegion(gfxContext* aContext, const nsIntRegion& aRegion);
/**
* Clip aTarget to the region aRegion.
*/
static void ClipToRegion(mozilla::gfx::DrawTarget* aTarget, const nsIntRegion& aRegion);
/**
* Create a path consisting of rectangles in |aRegion|.
*/
static void PathFromRegion(gfxContext* aContext, const nsIntRegion& aRegion);
/*
* Convert image format to depth value
*/
Bug 913872 - Take nested enums out of gfxASurface - 1/3 : automatic changes - r=jrmuizel Generated by these regexes: find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/gfx[A-Za-z0-9_]*Surface\:\:[a-z]*\(\(ImageFormat\|SurfaceType\|ContentType\|MemoryLocation\)[0-9A-Za-z_]*\)/gfx\1/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/gfx[A-Za-z0-9_]*Surface\:\:[a-z]*\(\(CONTENT_\|MEMORY_\)[0-9A-Za-z_]*\)/GFX_\1/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/\(^\|[^A-Za-z0-9_]\)\(CONTENT_COLOR\|CONTENT_ALPHA\|CONTENT_COLOR_ALPHA\|CONTENT_SENTINEL\|MEMORY_IN_PROCESS_HEAP\|MEMORY_IN_PROCESS_NONHEAP\|MEMORY_OUT_OF_PROCESS\)\($\|[^A-Za-z0-9_]\)/\1GFX_\2\3/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/\(^\|[^A-Za-z0-9_]\)\(ImageFormatARGB32\|ImageFormatRGB24\|ImageFormatA8\|ImageFormatA1\|ImageFormatRGB16_565\|ImageFormatUnknown\|SurfaceTypeImage\|SurfaceTypePDF\|SurfaceTypePS\|SurfaceTypeXlib\|SurfaceTypeXcb\|SurfaceTypeGlitz\|SurfaceTypeQuartz\|SurfaceTypeWin32\|SurfaceTypeBeOS\|SurfaceTypeDirectFB\|SurfaceTypeSVG\|SurfaceTypeOS2\|SurfaceTypeWin32Printing\|SurfaceTypeQuartzImage\|SurfaceTypeScript\|SurfaceTypeQPainter\|SurfaceTypeRecording\|SurfaceTypeVG\|SurfaceTypeGL\|SurfaceTypeDRM\|SurfaceTypeTee\|SurfaceTypeXML\|SurfaceTypeSkia\|SurfaceTypeSubsurface\|SurfaceTypeD2D\|SurfaceTypeMax\)\($\|[^A-Za-z0-9_]\)/\1gfx\2\3/g'
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static int ImageFormatToDepth(gfxImageFormat aFormat);
/**
* Return the transform matrix that maps aFrom to the rectangle defined by
* aToTopLeft/aToTopRight/aToBottomRight. aFrom must be
* nonempty and the destination rectangle must be axis-aligned.
*/
static gfxMatrix TransformRectToRect(const gfxRect& aFrom,
const gfxPoint& aToTopLeft,
const gfxPoint& aToTopRight,
const gfxPoint& aToBottomRight);
static Matrix TransformRectToRect(const gfxRect& aFrom,
const IntPoint& aToTopLeft,
const IntPoint& aToTopRight,
const IntPoint& aToBottomRight);
/**
* If aIn can be represented exactly using an nsIntRect (i.e.
* integer-aligned edges and coordinates in the int32_t range) then we
* set aOut to that rectangle, otherwise return failure.
*/
static bool GfxRectToIntRect(const gfxRect& aIn, nsIntRect* aOut);
/**
Bug 637852. Part 6: Implement resolution scaling in FrameLayerBuilder. r=tnikkel FrameLayerBuilder::BuildContainerLayerFor takes responsibility for resolution scaling. The ContainerParameters passed in are added to any transform requested. Then we extract the scale part of the transform, round the scale up to the nearest power of two if the transform may be actively animated (so we don't have to redraw layer contents constantly), pass that scale down to be applied by each child and set the residual transform on the ContainerLayer. For child layers built via BuildLayer, we just pass the requested scale factor in via the ContainerParameters. If the returned layer is a ContainerLayer then BuildLayer is guaranteed to have already done necessary scaling. If the returned layer is not a ContainerLayer then we apply the scale ourselves by adding the scale to the child layer's transform. For child ThebesLayers containing non-layer display items, we scale the drawing of those display items so that the child ThebesLayers are simply larger or smaller (larger or smaller visible regions). We have to scale all visible rects, clip rects etc that are in the coordinates of ThebesLayers or the parent ContainerLayer. To keep things simple we do this whenever we convert from appunits to integer layer coordinates. When a ThebesLayer's resolution changes we need to rerender the whole thing. nsDisplayList::PaintForFrame needs to respect the presshell's resolution setting. We do that by building a layer tree with a ContainerParameters requesting a scale up by the presshell resolution; once that layer tree is built, we adjust the root layer transform to scale back down by the resolution.
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* 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 gfxImageFormat::RGB24
* 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::PlanarYCbCrData& aData,
Bug 913872 - Take nested enums out of gfxASurface - 1/3 : automatic changes - r=jrmuizel Generated by these regexes: find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/gfx[A-Za-z0-9_]*Surface\:\:[a-z]*\(\(ImageFormat\|SurfaceType\|ContentType\|MemoryLocation\)[0-9A-Za-z_]*\)/gfx\1/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/gfx[A-Za-z0-9_]*Surface\:\:[a-z]*\(\(CONTENT_\|MEMORY_\)[0-9A-Za-z_]*\)/GFX_\1/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/\(^\|[^A-Za-z0-9_]\)\(CONTENT_COLOR\|CONTENT_ALPHA\|CONTENT_COLOR_ALPHA\|CONTENT_SENTINEL\|MEMORY_IN_PROCESS_HEAP\|MEMORY_IN_PROCESS_NONHEAP\|MEMORY_OUT_OF_PROCESS\)\($\|[^A-Za-z0-9_]\)/\1GFX_\2\3/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/\(^\|[^A-Za-z0-9_]\)\(ImageFormatARGB32\|ImageFormatRGB24\|ImageFormatA8\|ImageFormatA1\|ImageFormatRGB16_565\|ImageFormatUnknown\|SurfaceTypeImage\|SurfaceTypePDF\|SurfaceTypePS\|SurfaceTypeXlib\|SurfaceTypeXcb\|SurfaceTypeGlitz\|SurfaceTypeQuartz\|SurfaceTypeWin32\|SurfaceTypeBeOS\|SurfaceTypeDirectFB\|SurfaceTypeSVG\|SurfaceTypeOS2\|SurfaceTypeWin32Printing\|SurfaceTypeQuartzImage\|SurfaceTypeScript\|SurfaceTypeQPainter\|SurfaceTypeRecording\|SurfaceTypeVG\|SurfaceTypeGL\|SurfaceTypeDRM\|SurfaceTypeTee\|SurfaceTypeXML\|SurfaceTypeSkia\|SurfaceTypeSubsurface\|SurfaceTypeD2D\|SurfaceTypeMax\)\($\|[^A-Za-z0-9_]\)/\1gfx\2\3/g'
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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::PlanarYCbCrData& aData,
Bug 913872 - Take nested enums out of gfxASurface - 1/3 : automatic changes - r=jrmuizel Generated by these regexes: find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/gfx[A-Za-z0-9_]*Surface\:\:[a-z]*\(\(ImageFormat\|SurfaceType\|ContentType\|MemoryLocation\)[0-9A-Za-z_]*\)/gfx\1/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/gfx[A-Za-z0-9_]*Surface\:\:[a-z]*\(\(CONTENT_\|MEMORY_\)[0-9A-Za-z_]*\)/GFX_\1/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/\(^\|[^A-Za-z0-9_]\)\(CONTENT_COLOR\|CONTENT_ALPHA\|CONTENT_COLOR_ALPHA\|CONTENT_SENTINEL\|MEMORY_IN_PROCESS_HEAP\|MEMORY_IN_PROCESS_NONHEAP\|MEMORY_OUT_OF_PROCESS\)\($\|[^A-Za-z0-9_]\)/\1GFX_\2\3/g' find . -name '*.h' -o -name '*.cpp' -o -name '*.mm' | grep -v '\.hg' | grep -v '^\.\/obj' | xargs sed -i 's/\(^\|[^A-Za-z0-9_]\)\(ImageFormatARGB32\|ImageFormatRGB24\|ImageFormatA8\|ImageFormatA1\|ImageFormatRGB16_565\|ImageFormatUnknown\|SurfaceTypeImage\|SurfaceTypePDF\|SurfaceTypePS\|SurfaceTypeXlib\|SurfaceTypeXcb\|SurfaceTypeGlitz\|SurfaceTypeQuartz\|SurfaceTypeWin32\|SurfaceTypeBeOS\|SurfaceTypeDirectFB\|SurfaceTypeSVG\|SurfaceTypeOS2\|SurfaceTypeWin32Printing\|SurfaceTypeQuartzImage\|SurfaceTypeScript\|SurfaceTypeQPainter\|SurfaceTypeRecording\|SurfaceTypeVG\|SurfaceTypeGL\|SurfaceTypeDRM\|SurfaceTypeTee\|SurfaceTypeXML\|SurfaceTypeSkia\|SurfaceTypeSubsurface\|SurfaceTypeD2D\|SurfaceTypeMax\)\($\|[^A-Za-z0-9_]\)/\1gfx\2\3/g'
2013-09-24 20:45:13 +00:00
const gfxImageFormat& aDestFormat,
const gfxIntSize& aDestSize,
unsigned char* aDestBuffer,
int32_t aStride);
/**
* Clears surface to aColor (which defaults to transparent black).
*/
static void ClearThebesSurface(gfxASurface* aSurface,
nsIntRect* aRect = nullptr,
const gfxRGBA& aColor = gfxRGBA(0.0, 0.0, 0.0, 0.0));
/**
* Creates a copy of aSurface, but having the SurfaceFormat aFormat.
*
* This function always creates a new surface. Do not call it if aSurface's
* format is the same as aFormat. Such a non-conversion would just be an
* unnecessary and wasteful copy (this function asserts to prevent that).
*
* This function is intended to be called by code that needs to access the
* pixel data of the surface, but doesn't want to have lots of branches
* to handle different pixel data formats (code which would become out of
* date if and when new formats are added). Callers can use this function
* to copy the surface to a specified format so that they only have to
* handle pixel data in that one format.
*
* WARNING: There are format conversions that will not be supported by this
* function. It very much depends on what the Moz2D backends support. If
* the temporary B8G8R8A8 DrawTarget that this function creates has a
* backend that supports DrawSurface() calls passing a surface with
* aSurface's format it will work. Otherwise it will not.
*
* *** IMPORTANT PERF NOTE ***
*
* This function exists partly because format conversion is fraught with
* non-obvious performance hazards, so we don't want Moz2D consumers to be
* doing their own format conversion. Do not try to do so, or at least read
* the comments in this functions implemtation. That said, the copy that
* this function carries out has a cost and, although this function tries
* to avoid perf hazards such as expensive uploads to/readbacks from the
* GPU, it can't guarantee that it always successfully does so. Perf
* critical code that can directly handle the common formats that it
* encounters in a way that is cheaper than a copy-with-format-conversion
* should consider doing so, and only use this function as a fallback to
* handle other formats.
*
* XXXjwatt it would be nice if SourceSurface::GetDataSurface took a
* SurfaceFormat argument (with a default argument meaning "use the
* existing surface's format") and returned a DataSourceSurface in that
* format. (There would then be an issue of callers maybe failing to
* realize format conversion may involve expensive copying/uploading/
* readback.)
*/
static mozilla::TemporaryRef<DataSourceSurface>
CopySurfaceToDataSourceSurfaceWithFormat(SourceSurface* aSurface,
SurfaceFormat aFormat);
static const uint8_t sUnpremultiplyTable[256*256];
static const uint8_t sPremultiplyTable[256*256];
/**
* Return a color that can be used to identify a frame with a given frame number.
* The colors will cycle after sNumFrameColors. You can query colors 0 .. sNumFrameColors-1
* to get all the colors back.
*/
static const mozilla::gfx::Color& GetColorForFrameNumber(uint64_t aFrameNumber);
static const uint32_t sNumFrameColors;
enum BinaryOrData {
eBinaryEncode,
eDataURIEncode
};
/**
* Encodes the given surface to PNG/JPEG/BMP/etc. using imgIEncoder.
*
* @param aMimeType The MIME-type of the image type that the surface is to
* be encoded to. Used to create an appropriate imgIEncoder instance to
* do the encoding.
*
* @param aOutputOptions Passed directly to imgIEncoder::InitFromData as
* the value of the |outputOptions| parameter. Callers are responsible
* for making sure that this is a sane value for the passed MIME-type
* (i.e. for the type of encoder that will be created).
*
* @aBinaryOrData Flag used to determine if the surface is simply encoded
* to the requested binary image format, or if the binary image is
* further converted to base-64 and written out as a 'data:' URI.
*
* @aFile If specified, the encoded data is written out to aFile, otherwise
* it is copied to the clipboard.
*
* TODO: Copying to the clipboard as a binary file is not currently
* supported.
*/
static nsresult
EncodeSourceSurface(SourceSurface* aSurface,
const nsACString& aMimeType,
const nsAString& aOutputOptions,
BinaryOrData aBinaryOrData,
FILE* aFile);
/**
* Write as a PNG file to the path aFile.
*/
static void WriteAsPNG(SourceSurface* aSurface, const nsAString& aFile);
static void WriteAsPNG(SourceSurface* aSurface, const char* aFile);
static void WriteAsPNG(DrawTarget* aDT, const nsAString& aFile);
static void WriteAsPNG(DrawTarget* aDT, const char* aFile);
static void WriteAsPNG(nsIPresShell* aShell, const char* aFile);
/**
* Dump as a PNG encoded Data URL to a FILE stream (using stdout by
* default).
*
* Rather than giving aFile a default argument we have separate functions
* to make them easier to use from a debugger.
*/
static void DumpAsDataURI(SourceSurface* aSourceSurface, FILE* aFile);
static inline void DumpAsDataURI(SourceSurface* aSourceSurface) {
DumpAsDataURI(aSourceSurface, stdout);
}
static void DumpAsDataURI(DrawTarget* aDT, FILE* aFile);
static inline void DumpAsDataURI(DrawTarget* aDT) {
DumpAsDataURI(aDT, stdout);
}
/**
* Copy to the clipboard as a PNG encoded Data URL.
*/
static void CopyAsDataURI(SourceSurface* aSourceSurface);
static void CopyAsDataURI(DrawTarget* aDT);
#ifdef MOZ_DUMP_PAINTING
static bool DumpPaintList();
static bool sDumpPainting;
static bool sDumpPaintingToFile;
static FILE* sDumpPaintFile;
#endif
};
namespace mozilla {
namespace gfx {
/**
* If the CMS mode is eCMSMode_All, these functions transform the passed
* color to a device color using the transform returened by gfxPlatform::
* GetCMSRGBTransform(). If the CMS mode is some other value, the color is
* returned unchanged (other than a type change to Moz2D Color, if
* applicable).
*/
Color ToDeviceColor(Color aColor);
Color ToDeviceColor(nscolor aColor);
Color ToDeviceColor(const gfxRGBA& aColor);
/* These techniques are suggested by "Bit Twiddling Hacks"
*/
/**
* Returns true if |aNumber| is a power of two
* 0 is incorreclty considered a power of two
*/
static inline bool
IsPowerOfTwo(int aNumber)
{
return (aNumber & (aNumber - 1)) == 0;
}
/**
* Returns the first integer greater than |aNumber| which is a power of two
* Undefined for |aNumber| < 0
*/
static inline int
NextPowerOfTwo(int aNumber)
{
#if defined(__arm__)
return 1 << (32 - __builtin_clz(aNumber - 1));
#else
--aNumber;
aNumber |= aNumber >> 1;
aNumber |= aNumber >> 2;
aNumber |= aNumber >> 4;
aNumber |= aNumber >> 8;
aNumber |= aNumber >> 16;
return ++aNumber;
#endif
}
} // namespace gfx
} // namespace mozilla
#endif