gfxUtils Class Reference

#include <gfxUtils.h>

List of all members.

Static Public Member Functions
static void	PremultiplyImageSurface (gfxImageSurface *aSourceSurface, gfxImageSurface *aDestSurface=0L)
static void	UnpremultiplyImageSurface (gfxImageSurface *aSurface, gfxImageSurface *aDestSurface=0L)
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)
	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.
static void	ClipToRegion (gfxContext *aContext, const nsIntRegion &aRegion)
	Clip aContext to the region aRegion.
static void	ClipToRegionSnapped (gfxContext *aContext, const nsIntRegion &aRegion)
	Clip aContext to the region aRegion, snapping the rectangles.
static void	PathFromRegion (gfxContext *aContext, const nsIntRegion &aRegion)
	Create a path consisting of rectangles in |aRegion|.
static void	PathFromRegionSnapped (gfxContext *aContext, const nsIntRegion &aRegion)
	Create a path consisting of rectangles in |aRegion|, snapping the rectangles.
static int	ImageFormatToDepth (gfxASurface::gfxImageFormat aFormat)
static PRBool	GfxRectToIntRect (const gfxRect &aIn, nsIntRect *aOut)
	If aIn can be represented exactly using an nsIntRect (i.e.

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Member Function Documentation

static void gfxUtils::ClipToRegion	(	gfxContext *	aContext,
		const nsIntRegion &	aRegion
	)			[static]

Clip aContext to the region aRegion.

static void gfxUtils::ClipToRegionSnapped	(	gfxContext *	aContext,
		const nsIntRegion &	aRegion
	)			[static]

Clip aContext to the region aRegion, snapping the rectangles.

static void gfxUtils::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
	)			[static]

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 PRBool gfxUtils::GfxRectToIntRect	(	const gfxRect &	aIn,
		nsIntRect *	aOut
	)			[static]

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 int gfxUtils::ImageFormatToDepth

(

gfxASurface::gfxImageFormat

aFormat

)

[static]

static void gfxUtils::PathFromRegion	(	gfxContext *	aContext,
		const nsIntRegion &	aRegion
	)			[static]

Create a path consisting of rectangles in |aRegion|.

static void gfxUtils::PathFromRegionSnapped	(	gfxContext *	aContext,
		const nsIntRegion &	aRegion
	)			[static]

Create a path consisting of rectangles in |aRegion|, snapping the rectangles.

static void gfxUtils::PremultiplyImageSurface	(	gfxImageSurface *	aSourceSurface,
		gfxImageSurface *	aDestSurface = 0L
	)			[static]

static void gfxUtils::UnpremultiplyImageSurface	(	gfxImageSurface *	aSurface,
		gfxImageSurface *	aDestSurface = 0L
	)			[static]

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The documentation for this class was generated from the following file:

• gfxUtils.h