/*
	File:		ScaleBlit.h

	Contains:	fast scaling blitter

	Written by:	Strout

	Copyright:	Copyright ©1999 the Salk Institute

	Change History (most recent first):

         <1>    06/11/99    JJS     initial checkin to StimulusLib2 project
*/


//	ScaleBlit.h
//
//	This is a scaling blitter.  Requirements:
//
//		Dest rectangle must be an integer multiple of the source rectangle.
//		Both source and dest must be at least 16-bit color.
//		Source buffer width must be even (divisible by two).

// Prototypes
#ifdef __cplusplus
extern "C" {
#endif

#ifndef __QUICKDRAW__
#include <QuickDraw.h>
#endif

//	Use this function when scaling to an offscreen pixel map:
OSErr ScaleBlitOffscreen(PixMapPtr srcpm, PixMapPtr destpm, Rect *srcR, Rect *destR);

//	Use this function when scaling to the screen:
OSErr ScaleBlitToScreen(PixMapPtr srcpm, PixMapPtr destpm, PixMapPtr tempm, 
						Rect *srcR, Rect *destR);

// Note that in the latter function, you must supply an offscreen pixelmap (tempm)
// at least as large as destR.  It basically passes this to ScaleBlitOffscreen,
// then calls CopyBits to do the final copy to your destpm.

// Prototypes
#ifdef __cplusplus
}
#endif