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FishMarket 1.0
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FishMarket v1.0.iso
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showilbm.c
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C/C++ Source or Header
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1992-05-06
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8KB
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266 lines
/** ShowILBM.c **************************************************************
*
* Read an ILBM raster image file and display it. 11/19/85.
*
* By Jerry Morrison, Steve Shaw, and Steve Hayes, Electronic Arts.
* This software is in the public domain.
*
* USE THIS AS AN EXAMPLE PROGRAM FOR AN IFF READER.
*
* The IFF reader portion is essentially a recursive-descent parser.
* This program will look into a CAT or LIST to find a FORM ILBM, but it
* won't look inside another FORM type for a nested FORM ILBM.
*
* The display portion is specific to the Commodore Amiga computer.
*
* NOTE: This program displays an image, pauses, then exits.
*
* Usage from CLI:
* showilbm picture1 [picture2] ...
*
* Usage from WorkBench:
* Click on ShowILBM, hold down shift key, click on each picture to show,
* Double-click on final picture to complete the selection, release the
* shift key.
*
****************************************************************************/
#include <libraries/dos.h>
#include <libraries/dosextens.h>
#include <graphics/gfxbase.h>
#include "ilbm.h"
#include <workbench/workbench.h>
#include <workbench/startup.h>
#include "readpict.h"
/* ALLOCator that remembers size, allocates in CHIP-accessible memory.
* Does clear memory being allocated. */
extern UBYTE *ChipAlloc( /* LONG size */ );
/*---------- For MANX ---------*/
extern IFFP ReadPicture();
extern LONG Open();
extern LONG CurrentDir();
extern void *OpenLibrary();
/* FREEs memory allocated by allocators which REMember size allocated.
* Safe: checks whether pointer is NULL before attempting to free it. */
extern void RemFree( /* UBYTE *address */ );
/* $$$ Manx Mod needed here **/
#define MIN(a,b) ((a)<(b)?(a):(b))
/* general usage pointers */
struct GfxBase *GfxBase;
LONG IconBase; /* Actually, "struct IconBase *" if you've got some ".h" file*/
/* For displaying an image */
static struct RastPort rP;
static struct BitMap bitmap0;
static struct RasInfo rasinfo;
static struct View v = {0};
static struct ViewPort vp = {0};
static ILBMFrame iFrame;
/* Define the size of a temporary buffer used in unscrambling the ILBM rows.*/
#define bufSz 512
/* Message strings for IFFP codes. */
static char MsgOkay[] = { "(IFF_OKAY) No FORM ILBM in the file." };
static char MsgEndMark[] = { "(END_MARK) How did you get this message?" };
static char MsgDone[] = { "(IFF_DONE) All done."};
static char MsgDos[] = { "(DOS_ERROR) The DOS returned an error." };
static char MsgNot[] = { "(NOT_IFF) Not an IFF file." };
static char MsgNoFile[] = { "(NO_FILE) No such file found." };
static char MsgClientError[] = { "(CLIENT_ERROR) ShowILBM bug or insufficient RAM."};
static char MsgForm[] = { "(BAD_FORM) A malformed FORM ILBM." };
static char MsgShort[] = { "(SHORT_CHUNK) A malformed FORM ILBM." };
static char MsgBad[] = { "(BAD_IFF) A mangled IFF file." };
/* THESE MUST APPEAR IN RIGHT ORDER!! */
static char *IFFPMessages[-LAST_ERROR+1] = {
/*IFF_OKAY*/ MsgOkay,
/*END_MARK*/ MsgEndMark,
/*IFF_DONE*/ MsgDone,
/*DOS_ERROR*/ MsgDos,
/*NOT_IFF*/ MsgNot,
/*NO_FILE*/ MsgNoFile,
/*CLIENT_ERROR*/ MsgClientError,
/*BAD_FORM*/ MsgForm,
/*SHORT_CHUNK*/ MsgShort,
/*BAD_IFF*/ MsgBad
};
/** DisplayPic() ************************************************************
*
* Interface to Amiga graphics ROM routines.
*
****************************************************************************/
DisplayPic(bm, ptilbmFrame)
struct BitMap *bm;
ILBMFrame *ptilbmFrame;
{
int i;
struct View *oldView = GfxBase->ActiView; /* so we can restore it */
InitView(&v);
InitVPort(&vp);
v.ViewPort = &vp;
InitRastPort(&rP);
rP.BitMap = bm;
rasinfo.BitMap = bm;
/* Always show the upper left-hand corner of this picture. */
rasinfo.RxOffset = 0;
rasinfo.RyOffset = 0;
vp.DWidth = ptilbmFrame->bmHdr.w;
vp.DHeight = ptilbmFrame->bmHdr.h;
#if 0
/* Specify where on screen to put the ViewPort. */
vp.DxOffset = ptilbmFrame->bmHdr.x;
vp.DyOffset = ptilbmFrame->bmHdr.y;
#else
/* Always display it in upper left corner of screen.*/
#endif
if (ptilbmFrame->bmHdr.pageWidth <= 320)
vp.Modes = 0;
else vp.Modes = HIRES;
if (ptilbmFrame->bmHdr.pageHeight > 200) {
v.Modes |= LACE;
vp.Modes |= LACE;
}
vp.RasInfo = &rasinfo;
MakeVPort(&v,&vp);
MrgCop(&v);
LoadView(&v); /* show the picture */
WaitBlit();
WaitTOF();
LoadRGB4(&vp, ptilbmFrame->colorMap, (long)ptilbmFrame->nColorRegs);
for (i = 0; i < 5*60; ++i) WaitTOF(); /* Delay 5 seconds. */
LoadView(oldView); /* switch back to old view */
}
/** main0() *****************************************************************/
static struct WBStartup *wbStartup = 0; /* 0 unless started from WorkBench.*/
PrintS(msg)
char *msg;
{
if (!wbStartup)
printf(msg);
}
void GoodBye(msg)
char *msg;
{
PrintS(msg);
PrintS("\n");
exit(0L);
}
LONG OpenArg(wa, openmode)
struct WBArg *wa;
long openmode; /** $$$ Changed from "int" to "long" **/
{
LONG olddir;
LONG file;
if (wa->wa_Lock)
olddir = CurrentDir(wa->wa_Lock);
file = Open(wa->wa_Name, openmode);
if (wa->wa_Lock)
CurrentDir(olddir);
return(file);
}
void main0(wa)
struct WBArg *wa;
{
LONG file;
IFFP iffp = NO_FILE;
/* load and display the picture */
file = OpenArg(wa, MODE_OLDFILE);
if (file)
iffp = ReadPicture(file, &bitmap0, &iFrame, ChipAlloc);
/* Allocates BitMap using ChipAlloc().*/
Close(file);
if (iffp == IFF_DONE)
DisplayPic(&bitmap0, &iFrame);
PrintS(" "); PrintS(IFFPMessages[-iffp]); PrintS("\n");
/* cleanup */
if (bitmap0.Planes[0]) {
RemFree(bitmap0.Planes[0]);
/* ASSUMES allocated all planes via a single ChipAlloc call.*/
FreeVPortCopLists(&vp);
FreeCprList(v.LOFCprList);
}
}
/** main() ******************************************************************/
void main(argc, argv)
int argc;
char **argv;
{
struct WBArg wbArg, *wbArgs;
LONG olddir;
/*sss struct Process *myProcess; */
if( !(GfxBase = (struct GfxBase *)OpenLibrary("graphics.library",0L)) )
GoodBye("No graphics.library");
if( !(IconBase = (LONG)OpenLibrary("icon.library",0L)) )
GoodBye("No icon.library");
if (!argc) {
/* Invoked via workbench */
wbStartup = (struct WBStartup *)argv;
wbArgs = wbStartup->sm_ArgList;
argc = wbStartup->sm_NumArgs;
while (argc >= 2) {
olddir = CurrentDir(wbArgs[1].wa_Lock);
main0(&wbArgs[1]);
argc--; wbArgs = &wbArgs[1];
}
#ifdef xxxx
if (argc < 2) {
PrintS ("Usage from workbench:\n");
PrintS (" Click mouse on Show-ILBM, Then hold 'SHIFT' key\n");
GoodBye(" while double-click on file to display.");
}
#endif
}
else {
/* Invoked via CLI. Make a lock for current directory.
* Eventually, scan name, separate out directory reference?*/
if (argc < 2)
GoodBye("Usage from CLI: 'Show-ILBM filename'");
/*sss myProcess = (struct Process *)FindTask(0); */
wbArg.wa_Lock = 0; /*sss myProcess->pr_CurrentDir; */
while (argc >= 2) {
wbArg.wa_Name = argv[1];
PrintS("Showing file "); PrintS(wbArg.wa_Name); PrintS(" ...");
main0(&wbArg);
PrintS("\n");
argc--; argv = &argv[1];
}
}
CloseLibrary(GfxBase);
CloseLibrary(IconBase);
exit(0);
}