mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 08:35:26 +00:00
308 lines
12 KiB
C++
308 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* 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 "gfxTypes.h"
|
|
#include "GraphicsFilter.h"
|
|
#include "imgIContainer.h"
|
|
#include "mozilla/gfx/2D.h"
|
|
#include "mozilla/RefPtr.h"
|
|
#include "nsPrintfCString.h"
|
|
|
|
class gfxDrawable;
|
|
class nsIntRegion;
|
|
struct nsIntRect;
|
|
|
|
namespace mozilla {
|
|
namespace layers {
|
|
struct PlanarYCbCrData;
|
|
}
|
|
}
|
|
|
|
class gfxUtils {
|
|
public:
|
|
typedef mozilla::gfx::DataSourceSurface DataSourceSurface;
|
|
typedef mozilla::gfx::IntPoint IntPoint;
|
|
typedef mozilla::gfx::Matrix Matrix;
|
|
typedef mozilla::gfx::SourceSurface SourceSurface;
|
|
typedef mozilla::gfx::SurfaceFormat SurfaceFormat;
|
|
|
|
/*
|
|
* 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 gfxMatrix& aUserSpaceToImageSpace,
|
|
const gfxRect& aSubimage,
|
|
const gfxRect& aSourceRect,
|
|
const gfxRect& aImageRect,
|
|
const gfxRect& aFill,
|
|
const mozilla::gfx::SurfaceFormat aFormat,
|
|
GraphicsFilter aFilter,
|
|
uint32_t aImageFlags = imgIContainer::FLAG_NONE);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* Clip aContext to the region aRegion, snapping the rectangles.
|
|
*/
|
|
static void ClipToRegionSnapped(gfxContext* aContext, const nsIntRegion& aRegion);
|
|
|
|
/**
|
|
* Clip aTarget to the region aRegion, snapping the rectangles.
|
|
*/
|
|
static void ClipToRegionSnapped(mozilla::gfx::DrawTarget* aTarget, 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(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);
|
|
|
|
/**
|
|
* 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,
|
|
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,
|
|
const gfxImageFormat& aDestFormat,
|
|
const gfxIntSize& aDestSize,
|
|
unsigned char* aDestBuffer,
|
|
int32_t aStride);
|
|
|
|
/**
|
|
* 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;
|
|
|
|
#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);
|
|
|
|
static bool DumpPaintList();
|
|
|
|
static bool sDumpPainting;
|
|
static bool sDumpPaintingToFile;
|
|
static FILE* sDumpPaintFile;
|
|
|
|
/**
|
|
* Writes a binary PNG file.
|
|
* Expensive. Creates a DataSourceSurface, then a DrawTarget, then passes to DrawTarget overloads
|
|
*/
|
|
static void WriteAsPNG(mozilla::gfx::SourceSurface* aSourceSurface, const char* aFile);
|
|
|
|
/**
|
|
* Write as a PNG encoded Data URL to stdout.
|
|
* Expensive. Creates a DataSourceSurface, then a DrawTarget, then passes to DrawTarget overloads
|
|
*/
|
|
static void DumpAsDataURL(mozilla::gfx::SourceSurface* aSourceSurface);
|
|
|
|
/**
|
|
* Copy a PNG encoded Data URL to the clipboard.
|
|
* Expensive. Creates a DataSourceSurface, then a DrawTarget, then passes to DrawTarget overloads
|
|
*/
|
|
static void CopyAsDataURL(mozilla::gfx::SourceSurface* aSourceSurface);
|
|
#endif
|
|
};
|
|
|
|
namespace mozilla {
|
|
namespace gfx {
|
|
|
|
|
|
/* 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
|