3 files changed, 264 insertions, 0 deletions
diff --git a/Examples/AnimExample.c b/Examples/AnimExample.c
new file mode 100644
index 0000000..28d5357
--- /dev/null
+++ b/Examples/AnimExample.c
@@ -0,0 +1,129 @@
+/*
+	AnimExample.c - A simple DPaint animation player by Christian A. Weber.
+	This program is in the public domain, use and abuse at your own risk.
+	Requires the iff.library in the LIBS: dircetory. Compiles with
+	Lattice C V5.04 (LC -v -L AnimExample), should also work with Manx.
+*/
+
+#include <exec/types.h>
+#include <graphics/gfxbase.h>
+#include <intuition/intuition.h>
+#include <libraries/iff.h>			/* Our iff header file */
+
+struct Library *IntuitionBase,*IFFBase, *OpenLibrary();
+struct GfxBase *GfxBase;
+
+struct NewScreen ns =
+{
+	0,0,0,0,0,0,0, NULL, CUSTOMSCREEN|SCREENBEHIND|SCREENQUIET, NULL,
+	(STRPTR)"Anim Player Example by Christian A. Weber", NULL, NULL
+};
+
+struct Screen *screen1,*screen2, *OpenScreen();
+ULONG *ifffile;
+
+void SetOverscan(screen)		/* Adjust the screen position for overscan */
+register struct Screen *screen;
+{
+	register WORD cols,rows,x=screen->Width,y=screen->Height;
+	register struct ViewPort *vp=&(screen->ViewPort);
+
+	cols = GfxBase->NormalDisplayColumns>>1;
+	rows = GfxBase->NormalDisplayRows; if(rows>300) rows>>=1;
+	x -= cols; if(vp->Modes & HIRES) x -= cols;
+	y -= rows; if(vp->Modes & LACE)  y -= rows;
+	x >>=1; if(x<0) x=0; y >>=1; if(y<0) y=0; if(y>32) y=32;
+
+	if(vp->Modes & HAM)	/* Correct overscan HAM color distortions */
+	{
+		if(GfxBase->ActiView->DxOffset-x < 96)
+			x=GfxBase->ActiView->DxOffset-96;
+	}
+	vp->DxOffset = -x; vp->DyOffset = -y;
+	MakeScreen(screen); RethinkDisplay();
+}
+
+void Fail(text)			/* Print error message, free resources and exit */
+char *text;
+{
+	printf("%s, IFFError = %ld\n",text,IFFError());
+
+	if(ifffile) CloseIFF(ifffile);
+	if(screen1) CloseScreen(screen1);
+	if(screen2) CloseScreen(screen2);
+
+	if(IFFBase) CloseLibrary(IFFBase);	/* MUST ALWAYS BE CLOSED !! */
+	CloseLibrary(IntuitionBase);
+	CloseLibrary(GfxBase);
+	exit(0);
+}
+
+void main(argc,argv)
+int argc;
+char **argv;
+{
+	register LONG count,i,delay;
+	register ULONG *form,*loopform;
+	struct BitMapHeader *bmhd;
+	UWORD colortable[128];
+
+	if((argc != 4) || !strcmp(argv[1],"?")) {
+		printf("Format: %s filename <delaytime> <# of loops>\n",argv[0]);
+		exit(20);
+	}
+
+	GfxBase = (struct GfxBase *)OpenLibrary("graphics.library",0L);
+	IntuitionBase = OpenLibrary("intuition.library",0L);
+
+	if(!(IFFBase = OpenLibrary(IFFNAME,IFFVERSION))) {
+		printf("Copy the iff.library to your LIBS: directory!\n");
+		exit(10);
+	}
+
+	if(!(ifffile=OpenIFF(argv[1]))) Fail("Error opening file");
+	form=ifffile+3; /* Skip FORM....ANIM */
+
+	if(ifffile[2] != ID_ANIM) Fail("Not an ANIM file");
+	if(!(bmhd=GetBMHD(form))) Fail("BitMapHeader not found");
+
+	ns.Width     = bmhd->w;
+	ns.Height    = bmhd->h;
+	ns.Depth     = bmhd->nPlanes;
+	ns.ViewModes = GetViewModes(form);
+
+	if(!(screen1 = OpenScreen(&ns))) Fail("Can't open screen 1!");
+	if(!(screen2 = OpenScreen(&ns))) Fail("Can't open screen 2!");
+	SetOverscan(screen1); SetOverscan(screen2);
+
+	count = GetColorTab(form,colortable);
+	if(count>32L) count = 32L; /* Some HAM pictures have 64 colors ?! */
+	LoadRGB4(&(screen1->ViewPort),colortable,count);
+	LoadRGB4(&(screen2->ViewPort),colortable,count);
+
+	/* Decode and display the first frame: */
+	if(!DecodePic(form,&screen1->BitMap)) Fail("Can't decode picture");
+	DecodePic(form,&screen2->BitMap);
+	ScreenToFront(screen2);
+	if((delay=atol(argv[2])) > 1) Delay(delay);
+
+	/* Decode and display the second frame: copy and modify the first one */
+	form=FindChunk(ifffile+3,0L);		/* First FORM containing a DLTA */
+	if(!ModifyFrame(form,&screen1->BitMap)) Fail("Can't decode frame");
+	ScreenToFront(screen1);
+	if(delay>1) Delay(delay);
+
+	loopform=FindChunk(form,0L);		/* FORM to start loop at */
+	for(i=0; i<atol(argv[3]); ++i)		/* Loop n times */
+	{
+		for(form=loopform; *form==ID_FORM; form=FindChunk(form,0L))
+		{
+			register struct Screen *dummy;
+			if(!ModifyFrame(form,&screen2->BitMap)) Fail("Can't decode frame");
+			dummy=screen1; screen1=screen2; screen2=dummy;	/* Flip screens */
+			ScreenToFront(screen1);
+			if(delay>1) Delay(delay);
+		}
+	}
+	Fail("done"); 	/* Normal termination */
+}
+
diff --git a/Examples/Grabber.S b/Examples/Grabber.S
new file mode 100644
index 0000000..1a7faa1
--- /dev/null
+++ b/Examples/Grabber.S
@@ -0,0 +1,66 @@
+**
+**	$Id: Grabber.S,v 21.1 92/05/28 17:09:27 chris Exp $
+**	$Revision: 21.1 $
+**
+**	$Filename: Examples/Grabber.S $
+**	$Authors: Christian Haller, CHW $
+**	$Release: 21.1 $
+**	$Date: 92/05/28 17:09:27 $
+**
+**	Example for low level Assembler hackers :-)
+**
+**	This program saves the contents of the first screen as an IFF file
+**	with filename 'RAM:grabber.pic'. The iff.library is required.
+**	If you use the DevPac assembler, type 'Genim2 Grabber' to assemble.
+**	For simplicity, this program uses hard coded constants. You may wish
+**	to use the appropriate standard header files instead.
+**
+**	THIS IS PD. NO WARRANTY. USE AT YOUR OWN RISK.
+**
+
+Main:		move.l	4,a6			; AbsExecBase
+		lea	IFFName(PC),a1		; Library Name
+		moveq	#16,d0			; Required library version
+		jsr	-552(a6)		; OpenLibrary()
+		move.l	d0,a4			; A4 : IFF Library Base
+		tst.l	d0			; Did we get it ?
+		bne.s	IFFOpen			; Yes --->
+		moveq	#20,d0			; Return-code RETURN_FAIL
+		rts				; Return to CLI
+IFFOpen:
+		lea	IntuiName(PC),a1	; Intuition Library Name
+		jsr	-408(a6)		; OldOpenLibrary()
+		move.l	d0,a5			; A5 : IntuitionBase
+
+		move.l	60(a5),a0		; IntuitionBase->FirstScreen
+		move.l	88(a0),d6		; Screen.BitMap
+
+		move.l	48(a0),a1		; struct Colormap
+		move.l	4(a1),d7		; struct ColorTable
+		lea	44(a0),a1		; sc_ViewPort
+		move.w	32(a1),d1		; vp_Modes
+		moveq	#1,d0			; Set cruncher-flag
+		btst	#11,d1			; Hold And Modify ?
+		beq.s	NoHam			; no --->
+		bset	#7,d0			; Set HAM-Flag for IFF.lib
+NoHam:
+		move.l	a4,a6			; IFFBase
+		lea	FileName(PC),a0		; Name of file to save
+		move.l	d6,a1			; Pointer to BitMap
+		move.l	d7,a2			; Pointer to ColorMap
+		jsr	-66(a6)			; SaveBitMap()
+
+		move.l	4,a6			; AbsExecBase
+		move.l	a4,a1			; IFFBase
+		jsr	-414(a6)		; CloseLibrary() (IMPORTANT!)
+
+		move.l	a5,a1			; IntuitionBase
+		jsr	-414(a6)		; CloseLibrary()
+
+		moveq	#0,d0			; DOS return code
+		rts
+
+IFFName:	dc.b	"iff.library",0
+IntuiName:	dc.b	"intuition.library",0
+FileName:	dc.b	"RAM:grabber.pic",0
+
diff --git a/Examples/Makefile b/Examples/Makefile
new file mode 100644
index 0000000..3343a0d
--- /dev/null
+++ b/Examples/Makefile
@@ -0,0 +1,69 @@
+##
+##	$Id: $
+##	$Revision: $
+##
+##	$Filename: Examples/Makefile $
+##	$Author: Christian A. Weber $
+##	$Release: 21.1 $
+##	$Date: 92/05/17 03:09:18 $
+##
+##	Makefile to build iff.library examples
+##
+##	COPYRIGHT (C) 1987-1993 BY CHRISTIAN A. WEBER, BRUGGERWEG 2,
+##	CH-8037 ZUERICH, SWITZERLAND.
+##	THIS FILE MAY BE FREELY DISTRIBUTED. USE AT YOUR OWN RISK.
+##
+
+ALL:	EasyExample AnimExample GrabScreen
+
+
+#############################################################################
+##	Flags
+
+CFLAGS	= -cfustq -fid -ms -v -rr -s -O
+AFLAGS	= -l -iINCLUDE: 
+LFLAGS	= ADDSYM
+
+
+#############################################################################
+##	Rules
+
+.s.o:
+	Genam $(AFLAGS) $*.S
+
+.c.o:
+	LC $(CFLAGS) $*.c
+
+
+#############################################################################
+##	EasyExample
+
+EX_STARTUP	= LIB:c.o
+EX_MODULES	= EasyExample.o
+EX_LIBS		= LIB:lcr.lib
+
+EasyExample:	$(EX_STARTUP) $(EX_MODULES) $(EX_LIBS)
+		BLINK FROM $(EX_STARTUP) $(EX_MODULES) TO $* LIB $(EX_LIBS)
+
+
+#############################################################################
+##	AnimEXample
+
+AX_STARTUP	= LIB:c.o
+AX_MODULES	= AnimExample.o
+AX_LIBS		= LIB:lcr.lib
+
+AnimExample:	$(AX_STARTUP) $(AX_MODULES) $(AX_LIBS)
+		BLINK FROM $(AX_STARTUP) $(AX_MODULES) TO $* LIB $(AX_LIBS)
+
+
+#############################################################################
+##	GrabScreen
+
+GS_STARTUP	= LIB:c.o
+GS_MODULES	= GrabScreen.o
+GS_LIBS		= LIB:lcr.lib
+
+GrabScreen:	$(GS_STARTUP) $(GS_MODULES) $(GS_LIBS)
+		BLINK FROM $(GS_STARTUP) $(GS_MODULES) TO $* LIB $(GS_LIBS)
+