Unit 'CYBERGRAPHICS'	Package
[Overview][Constants][Types][Procedures and functions][Variables][Index]	[#morphunits]

BltBitMapAlpha

Blend a rectangular region of pixels in a BitMap. (v51)

Declaration

Source position: cybergraphics.pas line 328

function BltBitMapAlpha(

srcBitMap: PBitMap;

xSrc: LongInt;

ySrc: LongInt;

destBitMap: PBitMap;

xDest: LongInt;

yDest: LongInt;

xSize: LongInt;

ySize: LongInt;

tagList: PTagItem

):LongWord;

`srcBitMap`		the BitMap(s) containing the source rectangle
`xSrc`		Left corner of the source rectangle. Valid range is positive signed integer such that the raster word's offset 0..(32767-Size)
`ySrc`		Top corner of the source rectangle. Valid range is positive signed integer such that the raster word's offset 0..(32767-Size)
`destBitMap`		the BitMap(s) containing the destination rectangle
`xDest`		the x coordinate of the upper left corner of the destination for the rectangle. Valid range is as for Src.
`yDest`		the y coordinate of the upper left corner of the destination for the rectangle. Valid range is as for Src.
`xSize`		Width of the rectangle to be moved.
`ySize`		Height of the rectangle to be moved.
`tagList`		tags for options

Blend a rectangular region of pixels in a BitMap.

Available Tags

BLTBMA_DESTALPHAVALUE: Determines what happens to the destination pixel alpha component. DESTALPHAVALUE_UNDEFINED, DESTALPHAVALUE_ONE, DESTALPHAVALUE_USESOURCE, DESTALPHAVALUE_USEDEST
BLTBMA_MIXLEVEL: Set the global 32bit left-justified alpha mix level, defaults to $80808080 (50%) if source alpha is not used, otherwise $FFFFFFFF (100%)
BLTBMA_USESOURCEALPHA: Use the supplied per pixel source alpha value if a non-zero data value is passed, disabled by default

Uses hardware acceleration on dedicated hardware

Uses Altivec enabled code if hardware acceleration is not available but an Altivec unit is available

ClipBlit		Calls BltBitMap() after accounting for windows
BltBitMap		Move a rectangular region of bits in a BitMap.