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Diffstat (limited to 'Examples/AnimExample.c')
| -rw-r--r-- | Examples/AnimExample.c | 129 |
1 files changed, 129 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 */ +} + |