Ejemplos de GrPixel en C++ (Cpp)

Ejemplo n.º 1

Archivo: ctx2pnm.c Proyecto: nidheeshdas/Algosim

int GrSaveContextToPgm( GrContext *grc, char *pgmfn, char *docn )
{
  FILE *f;
  GrContext grcaux;
  char cab[81];
  unsigned char grey;
  int rgb[3];
  int x, y;

  if( (f = fopen( pgmfn,"wb" )) == NULL ) return -1;
  
  GrSaveContext( &grcaux );
  if( grc != NULL ) GrSetContext( grc );
  sprintf( cab,"P5\n#" );
  fwrite( cab,1,strlen( cab ),f );
  if( docn != NULL ) fwrite( docn,1,strlen( docn ), f );
  sprintf( cab,"\n%d %d\n255\n",GrSizeX(),GrSizeY() );
  fwrite( cab,1,strlen( cab ),f );
  for( y=0; y<GrSizeY(); y++ )
    for( x=0; x<GrSizeX(); x++ ){
      GrQueryColor( GrPixel( x,y ),&rgb[0],&rgb[1],&rgb[2] );
      grey = (0.229 * rgb[0]) + (0.587 * rgb[1]) + (0.114 * rgb[2]);
      fwrite( &grey,1,1,f );
      }
  GrSetContext( &grcaux );
  fclose( f );

  return 0;
}

Ejemplo n.º 2

Archivo: ctx2pnm.c Proyecto: nidheeshdas/Algosim

int GrSaveContextToPpm( GrContext *grc, char *ppmfn, char *docn )
{
  FILE *f;
  GrContext grcaux;
  char cab[81];
  unsigned char brgb[3];
  int x, y, r, g, b;

  if( (f = fopen( ppmfn,"wb" )) == NULL ) return -1;
  
  GrSaveContext( &grcaux );
  if( grc != NULL ) GrSetContext( grc );
  sprintf( cab,"P6\n#" );
  fwrite( cab,1,strlen( cab ),f );
  if( docn != NULL ) fwrite( docn,1,strlen( docn ), f );
  sprintf( cab,"\n%d %d\n255\n",GrSizeX(),GrSizeY() );
  fwrite( cab,1,strlen( cab ),f );
  for( y=0; y<GrSizeY(); y++ )
    for( x=0; x<GrSizeX(); x++ ){
      GrQueryColor( GrPixel( x,y ),&r,&g,&b );
      brgb[0] = r;
      brgb[1] = g;
      brgb[2] = b;
      fwrite( brgb,1,3,f );
      }
  GrSetContext( &grcaux );
  fclose( f );

  return 0;
}

Ejemplo n.º 3

Archivo: ctx2pnm.c Proyecto: nidheeshdas/Algosim

int GrSaveContextToPbm( GrContext *grc, char *pbmfn, char *docn )
{
  FILE *f;
  GrContext grcaux;
  char cab[81];
  int currentbyte = 0, currentbit = 7;
  int x, y;

  if( (f = fopen( pbmfn,"wb" )) == NULL ) return -1;
  
  GrSaveContext( &grcaux );
  if( grc != NULL ) GrSetContext( grc );
  sprintf( cab,"P4\n#" );
  fwrite( cab,1,strlen( cab ),f );
  if( docn != NULL ) fwrite( docn,1,strlen( docn ), f );
  sprintf( cab,"\n%d %d\n",GrSizeX(),GrSizeY() );
  fwrite( cab,1,strlen( cab ),f );
  for( y=0; y<GrSizeY(); y++ ){
    for( x=0; x<GrSizeX(); x++ ){
      if( GrPixel( x,y ) == GrBlack() )
        currentbyte |= 1 << currentbit;
      currentbit--;
      if( currentbit < 0 ){
        fwrite( &currentbyte,1,1,f );
        currentbyte = 0;
        currentbit = 7;
        }
      }
    if( currentbit < 7 ){
      fwrite( &currentbyte,1,1,f );
      currentbyte = 0;
      currentbit = 7;
      }
    }
  GrSetContext( &grcaux );
  fclose( f );

  return 0;
}

Ejemplo n.º 4

Archivo: scr_djgr.c Proyecto: EPiCS/reconos_v2

/*
**	Read Pixel
*/
static MWPIXELVAL
DJGR_readpixel(PSD psd,MWCOORD x, MWCOORD y)
{
	return GrPixel(x, y);
}