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17 Bit Software 3: The Continuation
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saveilbm.c
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C/C++ Source or Header
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1994-01-27
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4KB
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145 lines
/***************************************************************************
* SaveILBM.c -- Save raw raster image as ILBM file
* by Carolyn Scheppner CBM 01/86
* Using IFF rtns by J.Morrison and S.Shaw of Electronic Arts
*
***************************************************************************/
/*
#include <exec/types.h>
#include <exec/memory.h>
#include <libraries/dos.h>
#include <graphics/gfxbase.h>
#include <graphics/rastport.h>
#include <graphics/gfx.h>
#include <graphics/view.h>
*/
#include <intuition/intuition.h>
#include <intuition/intuitionbase.h>
#include <libraries/dos.h>
#include "ilbm.h"
#define bufSize 512
/*
struct Window *activeWindow;
struct Screen *activeScreen;
struct Screen *firstScreen;
struct Screen *nextScreen, *highScreen;
struct View *thisView;
struct View *picView = 0;
*/
struct ViewPort *picViewPort;
struct BitMap *picBitMap;
WORD *picColorTable;
/* main() */
void save_screen( s, name )
struct Screen *s;
char name[];
{
LONG file;
if( file = Open(name, MODE_NEWFILE) ) {
Write(file,"x",1); /* so Seek to beginning works ????? */
picViewPort = &( s -> ViewPort );
picBitMap = (struct BitMap *)
picViewPort -> RasInfo -> BitMap;
picColorTable = (WORD *)
picViewPort -> ColorMap -> ColorTable;
/* iffp = */
PutPicture(file, picBitMap, picColorTable);
Close(file);
} else
printf("Error opening file [%s].\n", name );
}
/** PutPicture() ***********************************************************
*
* Put a picture into an IFF file.
* This procedure calls PutAnILBM, passing in an <x, y> location of <0, 0>,
* a NULL mask, and a locally-allocated buffer. It also assumes you want to
* write out all the bitplanes in the BitMap.
*
***************************************************************************/
Point2D nullPoint = {0, 0};
IFFP PutPicture(file, bitmap, colorMap)
LONG file;
struct BitMap *bitmap;
WORD *colorMap;
{
BYTE buffer[bufSize];
return(
PutAnILBM(file, bitmap, NULL,
colorMap, bitmap->Depth, &nullPoint,
buffer, bufSize
)
);
}
/** PutAnILBM() ************************************************************
*
* Write an entire BitMap as a FORM ILBM in an IFF file.
* This version works for any display mode (C. Scheppner).
*
* Normal return result is IFF_OKAY.
*
* The utility program IFFCheck would print the following outline of the
* resulting file:
*
* FORM ILBM
* BMHD
* CMAP
* BODY (compressed)
*
***************************************************************************/
#define CkErr(expression) {if (ifferr == IFF_OKAY) ifferr = (expression);}
IFFP PutAnILBM(file, bitmap, mask, colorMap, depth, xy, buffer, bufsize)
LONG file; struct BitMap *bitmap; BYTE *mask; WORD *colorMap;
UBYTE depth; Point2D *xy;
BYTE *buffer; LONG bufsize;
{
BitMapHeader bmHdr;
GroupContext fileContext, formContext;
IFFP ifferr;
WORD pageWidth, pageHeight;
pageWidth = (bitmap->BytesPerRow) << 3;
pageHeight = bitmap->Rows;
ifferr = InitBMHdr(&bmHdr, bitmap, mskNone,
cmpByteRun1, 0, pageWidth, pageHeight);
/* You could write an uncompressed image by passing cmpNone instead
* of cmpByteRun1 to InitBMHdr. */
bmHdr.nPlanes = depth; /* This must be <= bitmap->Depth */
if (mask != NULL) bmHdr.masking = mskHasMask;
bmHdr.x = xy->x; bmHdr.y = xy->y;
CkErr( OpenWIFF(file, &fileContext, szNotYetKnown) );
CkErr(StartWGroup(&fileContext, FORM, szNotYetKnown, ID_ILBM, &formContext));
CkErr( PutBMHD(&formContext, &bmHdr) );
CkErr( PutCMAP(&formContext, colorMap, depth) );
CkErr( PutBODY(&formContext, bitmap, mask, &bmHdr, buffer, bufsize) );
CkErr( EndWGroup(&formContext) );
CkErr( CloseWGroup(&fileContext) );
return( ifferr );
}