OpenJDK 27 · sun.java2d.pipe.BufferedMaskFill · APIdia, the JavaDoc alternative

The MaskFill operation is expressed as: dst = ((src <MODE> dst) * pathA) + (dst * (1 - pathA)) The OGL/D3D implementation of the MaskFill operation differs from the above equation because it is not possible to perform such a complex operation in OpenGL/Direct3D (without the use of advanced techniques like fragment shaders and multitexturing). Therefore, the BufferedMaskFill operation is expressed as: dst = (src * pathA) <SrcOver> dst This simplified formula is only equivalent to the "true" MaskFill equation in the following situations: - <MODE> is SrcOver - <MODE> is Src, extra alpha == 1.0, and the source paint is opaque Therefore, we register BufferedMaskFill primitives for only the SurfaceType and CompositeType restrictions mentioned above. In addition, for the SrcNoEa case we must override the incoming composite with a SrcOver (no extra alpha) instance, so that we set up the OpenGL/Direct3D blending mode to match the BufferedMaskFill equation.

Field Summary

Modifier and Type	Field and Description
protected final RenderQueue	rq

Inherited from sun.java2d.loops.MaskFill:: drawPgramSignature fillPgramSignature methodSignature primTypeID

Constructor Summary

Access	Constructor and Description
protected	BufferedMaskFill(RenderQueue rq, SurfaceType srcType, CompositeType compType, SurfaceType dstType)

Method Summary

Modifier and Type	Method and Description
public void	MaskFill(SunGraphics2D sg2d, SurfaceData sData, Composite comp, final int x, final int y, final int w, final int h, final byte[] mask, final int maskoff, final int maskscan) Overrides sun.java2d.loops.MaskFill.MaskFill. All MaskFill implementors must have this invoker method
protected abstract void	maskFill(int x, int y, int w, int h, int maskoff, int maskscan, int masklen, byte[] mask) Called as a separate Runnable when the operation is too large to fit on the RenderQueue.
protected abstract void	validateContext(SunGraphics2D sg2d, Composite comp, int ctxflags) Validates the state in the provided SunGraphics2D object and sets up any special resources for this operation (e.g. enabling gradient shading).

Inherited from sun.java2d.loops.MaskFill:: canDoParallelograms DrawAAPgram FillAAPgram getFromCache locate locatePrim makePrimitive traceWrap

Field Detail

rq	back to summary
protected final RenderQueue rq

Constructor Detail

BufferedMaskFill	back to summary
protected BufferedMaskFill(RenderQueue rq, SurfaceType srcType, CompositeType compType, SurfaceType dstType)

Method Detail

MaskFill	back to summary
public void MaskFill(SunGraphics2D sg2d, SurfaceData sData, Composite comp, final int x, final int y, final int w, final int h, final byte[] mask, final int maskoff, final int maskscan) Overrides sun.java2d.loops.MaskFill.MaskFill. Doc from sun.java2d.loops.MaskFill.MaskFill. All MaskFill implementors must have this invoker method Annotations @Override

MaskFill

back to summary

public void MaskFill(SunGraphics2D sg2d, SurfaceData sData, Composite comp, final int x, final int y, final int w, final int h, final byte[] mask, final int maskoff, final int maskscan)

Overrides sun.java2d.loops.MaskFill.MaskFill.

Doc from sun.java2d.loops.MaskFill.MaskFill.

All MaskFill implementors must have this invoker method

Annotations

@Override

maskFill	back to summary
protected abstract void maskFill(int x, int y, int w, int h, int maskoff, int maskscan, int masklen, byte[] mask) Called as a separate Runnable when the operation is too large to fit on the RenderQueue. The OGL/D3D pipelines each have their own (small) native implementation of this method.