130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
typedef struct _RunlengthPacket
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{
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unsigned short
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red,
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green,
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blue,
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length;
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unsigned short
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index;
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} RunlengthPacket;
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typedef struct _Image
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{
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int
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status,
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temporary;
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char
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filename[1664 ];
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long int
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filesize;
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int
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pipe;
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char
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magick[1664 ],
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*comments,
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*label,
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*text;
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unsigned int
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matte;
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unsigned int
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columns,
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rows,
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depth;
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unsigned int
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scene,
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number_scenes;
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char
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*montage,
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*directory;
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unsigned int
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colors;
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double
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gamma;
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float
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x_resolution,
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y_resolution;
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unsigned int
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mean_error_per_pixel;
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double
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normalized_mean_error,
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normalized_maximum_error;
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unsigned long
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total_colors;
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char
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*signature;
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unsigned int
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packets,
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runlength,
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packet_size;
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unsigned char
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*packed_pixels;
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long int
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magick_time;
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char
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magick_filename[1664 ];
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unsigned int
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magick_columns,
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magick_rows;
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char
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*geometry,
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*page;
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unsigned int
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dispose,
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delay,
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iterations;
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unsigned int
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orphan;
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struct _Image
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*previous,
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*list,
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*next;
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} Image;
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Image *MinifyImage(Image *image)
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{
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Image
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*minified_image;
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register RunlengthPacket
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*q,
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*s,
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*s0,
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*s1,
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*s2,
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*s3;
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register unsigned int
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x;
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unsigned int
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blue,
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green,
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red;
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unsigned long
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total_matte,
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total_blue,
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total_green,
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total_red;
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unsigned short
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index;
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for (x=0; x < (image->columns-1); x+=2)
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{
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total_red=0;
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total_green=0;
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total_blue=0;
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total_matte=0;
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s=s0;
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total_red+=( 3 )*(s->red); total_green+=( 3 )*(s->green); total_blue+=( 3 )*(s->blue); total_matte+=( 3 )*(s->index); s++; ; total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ; total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ; total_red+=( 3 )*(s->red); total_green+=( 3 )*(s->green); total_blue+=( 3 )*(s->blue); total_matte+=( 3 )*(s->index); s++; ;
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s=s1;
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total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ; total_red+=( 15 )*(s->red); total_green+=( 15 )*(s->green); total_blue+=( 15 )*(s->blue); total_matte+=( 15 )*(s->index); s++; ; total_red+=( 15 )*(s->red); total_green+=( 15 )*(s->green); total_blue+=( 15 )*(s->blue); total_matte+=( 15 )*(s->index); s++; ; total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ;
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s=s2;
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total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ; total_red+=( 15 )*(s->red); total_green+=( 15 )*(s->green); total_blue+=( 15 )*(s->blue); total_matte+=( 15 )*(s->index); s++; ; total_red+=( 15 )*(s->red); total_green+=( 15 )*(s->green); total_blue+=( 15 )*(s->blue); total_matte+=( 15 )*(s->index); s++; ; total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ;
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s=s3;
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total_red+=( 3 )*(s->red); total_green+=( 3 )*(s->green); total_blue+=( 3 )*(s->blue); total_matte+=( 3 )*(s->index); s++; ; total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ; total_red+=( 7 )*(s->red); total_green+=( 7 )*(s->green); total_blue+=( 7 )*(s->blue); total_matte+=( 7 )*(s->index); s++; ; total_red+=( 3 )*(s->red); total_green+=( 3 )*(s->green); total_blue+=( 3 )*(s->blue); total_matte+=( 3 )*(s->index); s++; ;
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red=(unsigned short) ((total_red+63) >> 7);
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green=(unsigned short) ((total_green+63) >> 7);
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blue=(unsigned short) ((total_blue+63) >> 7);
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index=(unsigned short) ((total_matte+63) >> 7);
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if ((red == q->red) && (green == q->green) && (blue == q->blue) &&
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(index == q->index) && ((int) q->length < 65535L ))
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q->length++;
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}
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return(minified_image);
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}
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