BufferedMaskBlit

Class Overview

The MaskBlit operation is expressed as: dst = ((src dst) * pathA) + (dst * (1 - pathA)) The OGL/D3D implementation of the MaskBlit 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 BufferedMaskBlit operation is expressed as: dst = (src * pathA) dst This simplified formula is only equivalent to the "true" MaskBlit equation in the following situations: - is SrcOver - is Src, extra alpha == 1.0, and the source surface is opaque Therefore, we register BufferedMaskBlit primitives for only the SurfaceType and CompositeType restrictions mentioned above. In addition for the Src case, we must override the composite with a SrcOver (no extra alpha) instance, so that we set up the OpenGL/Direct3D blending mode to match the BufferedMaskBlit equation.

Summary

[Expand] Inherited Constants
From class sun.java2d.loops.GraphicsPrimitive int TRACECOUNTS int TRACELOG int TRACETIMESTAMP

[Expand] Inherited Fields
From class sun.java2d.loops.MaskBlit public static final String methodSignature public static final int primTypeID
From class sun.java2d.loops.GraphicsPrimitive public static String tracefile public static int traceflags public static PrintStream traceout

[Expand] Inherited Methods
From class sun.java2d.loops.MaskBlit void MaskBlit(SurfaceData src, SurfaceData dst, Composite comp, Region clip, int srcx, int srcy, int dstx, int dsty, int width, int height, byte[] mask, int maskoff, int maskscan) All MaskBlit implementors must have this invoker method static MaskBlit getFromCache(SurfaceType src, CompositeType comp, SurfaceType dst) static MaskBlit locate(SurfaceType srctype, CompositeType comptype, SurfaceType dsttype) GraphicsPrimitive makePrimitive(SurfaceType srctype, CompositeType comptype, SurfaceType dsttype) GraphicsPrimitive traceWrap()
From class sun.java2d.loops.GraphicsPrimitive static SurfaceData convertFrom(Blit ob, SurfaceData srcData, int srcX, int srcY, int w, int h, SurfaceData dstData, int type) static SurfaceData convertFrom(Blit ob, SurfaceData srcData, int srcX, int srcY, int w, int h, SurfaceData dstData) static void convertTo(Blit ob, SurfaceData srcImg, SurfaceData dstImg, Region clip, int dstX, int dstY, int w, int h) static Blit createConverter(SurfaceType srctype, SurfaceType dsttype) final CompositeType getCompositeType() final SurfaceType getDestType() static GraphicsPrimitive getGeneralOp(int primID, CompositeType comptype) final long getNativePrim() final int getPrimTypeID() Gets unique id for this GraphicsPrimitive type. final String getSignature() final SurfaceType getSourceType() final int getUniqueID() Gets instance ID of this graphics primitive. synchronized final static int makePrimTypeID() abstract GraphicsPrimitive makePrimitive(SurfaceType srctype, CompositeType comptype, SurfaceType dsttype) synchronized final static int makeUniqueID(int primTypeID, SurfaceType src, CompositeType cmp, SurfaceType dst) final boolean satisfies(String signature, SurfaceType srctype, CompositeType comptype, SurfaceType dsttype) Return true if this primitive can be used for the given signature surfaces, and composite. void setupGeneralBinaryOp(GraphicsPrimitive.GeneralBinaryOp gbo) void setupGeneralUnaryOp(GraphicsPrimitive.GeneralUnaryOp guo) static String simplename(Field[] fields, Object o) static String simplename(CompositeType ct) static String simplename(SurfaceType st) String toString() Returns a string representation of the object. synchronized static void tracePrimitive(Object prim) abstract GraphicsPrimitive traceWrap() static boolean tracingEnabled()
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait() Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object. final void wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed. final void wait(long timeout) Causes the current thread to wait until either another thread invokes the notify() method or the notifyAll() method for this object, or a specified amount of time has elapsed.