107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/**
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** pngtest.c ---- test the ctx2png routines
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**
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** Copyright (c) 2001 Mariano Alvarez Fernandez
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** [e-mail: malfer@teleline.es]
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**
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** This is a test/demo file of the GRX graphics library.
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** You can use GRX test/demo files as you want.
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**
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** The GRX graphics library is free software; you can redistribute it
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** and/or modify it under some conditions; see the "copying.grx" file
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** for details.
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**
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** This library is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**/
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#include <stdio.h>
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#include <stdlib.h>
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#include "grx20.h"
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#include "grxkeys.h"
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void imagen( char *nf )
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{
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GrContext *grc;
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int wide, high;
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char s[81];
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int w, h;
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GrQueryPng( nf,&w,&h );
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sprintf( s,"%s %dx%d",nf,w,h );
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wide = (w > 300) ? 300 : w;
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high = (h > 400) ? 400 : h;
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GrClearScreen( GrAllocColor( 0,0,200 ) );
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GrBox( 10,40,10+wide+1,40+high+1,GrWhite() );
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grc = GrCreateSubContext( 11,41,11+wide-1,41+high-1,NULL,NULL );
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GrLoadContextFromPng( grc,nf,0 );
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GrDestroyContext( grc );
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GrBox( 320,40,320+wide+1,40+high+1,GrWhite() );
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grc = GrCreateSubContext( 321,41,321+wide-1,41+high-1,NULL,NULL );
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GrLoadContextFromPng( grc,nf,1 );
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GrDestroyContext( grc );
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GrTextXY( 10,10,s,GrBlack(),GrWhite() );
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GrTextXY( 10,50+high,"Press any key to continue",GrBlack(),GrWhite() );
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GrKeyRead();
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}
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void nopngsupport( void )
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{
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char *s[6] = {
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"Warning!",
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"You need libpng (http://www.libpng.org/pub/png/libpng.html)",
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"and enable png support in the GRX lib (edit makedefs.grx)",
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"to run this demo",
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" ",
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"Press any key to continue..." };
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int i;
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GrClearScreen( GrAllocColor( 0,0,100 ) );
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for( i=0; i<6; i++ )
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GrTextXY( 90,160+i*18,s[i],GrWhite(),GrNOCOLOR );
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GrKeyRead();
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}
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int main()
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{
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GrContext *grc;
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GrSetMode( GR_width_height_bpp_graphics,640,480,24 );
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if( !GrPngSupport() ){
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nopngsupport();
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GrSetMode(GR_default_text);
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exit( 1 );
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}
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imagen( "pngcompo.png" );
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imagen( "pngowl.png" );
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imagen( "pngred.png" );
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GrClearScreen( GrAllocColor( 0,100,0 ) );
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grc = GrCreateSubContext( 191,121,191+256-1,121+240-1,NULL,NULL );
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GrLoadContextFromPng( grc,"pngred.png",1 );
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GrDestroyContext( grc );
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grc = GrCreateSubContext( 181,241,181+289-1,241+80-1,NULL,NULL );
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GrLoadContextFromPng( grc,"pngcompo.png",1 );
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GrDestroyContext( grc );
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GrTextXY( 10,10,"Press any key to save screen",GrBlack(),GrWhite() );
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GrKeyRead();
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GrSaveContextToPng( NULL,"output.png" );
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GrClearScreen( GrBlack() );
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GrTextXY( 10,10,"Press any key to reload screen",GrBlack(),GrWhite() );
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GrKeyRead();
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GrLoadContextFromPng( NULL,"output.png",0 );
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GrTextXY( 10,10,"Press any key to end ",GrBlack(),GrWhite() );
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GrKeyRead();
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GrSetMode(GR_default_text);
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return 0;
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}
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