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

ScalePixelArray

Scale the colors values of a rectangular array (V41)

Declaration

Source position: cybergraphics.pas line 237

function ScalePixelArray(

srcRect: POINTER;

SrcW: Word;

SrcH: Word;

SrcMod: Word;

a1arg: pRastPort;

DestX: Word;

DestY: Word;

DestW: Word;

DestH: Word;

SrcFormat: Byte

):LongInt;

Arguments

`srcRect`		Pointer to an array of pixels from which to fetch the pixel data. The pixel format is specified in `SrcFormat`
`SrcW`		Width of the source rectangle
`SrcH`		Height of the source rectangle
`SrcMod`		The number of bytes per row in the source rectangle.
`a1arg`		pointer to a RastPort structure
`DestX`		starting x point in the RastPort
`DestY`		starting y point in the RastPort
`DestW`		Width of the destination area
`DestH`		Height of the destination area
`SrcFormat`		pixel format in the source rectangle. Currently supported formats are: RECTFMT_RGB, RECTFMT_RGBA, RECTFMT_ARGB, RECTFMT_LUT8, RECTFMT_GREY8

Function result

number of pixels plotted

Description

Scale the colors values of a rectangular array of pixels starting at a specified x,y location and continuing through to another x,y location within a certain RastPort

For each pixel in a rectangular region, scale the color values from a linear array of color values into the bitmap used to describe a particular rastport.

Attention

Up to v40, this function only worked on screens depths > 8 bits. You may specify RECTFMT_LUT8 on 8bit screens, too now if v41 is available

Errors