64 lines
1.6 KiB
Text
64 lines
1.6 KiB
Text
/* BITMAP FILE: read in a file in PPM format, P6 (binary). 14/5/2010 */
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test: procedure options (main);
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declare (m, n, max_color, i, j) fixed binary (31);
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declare ch character (1), ID character (2);
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declare 1 pixel union,
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2 color bit(24) aligned,
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2 primary_colors,
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3 R char (1),
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3 G char (1),
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3 B char (1);
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declare in file record;
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open file (in) title ('/IMAGE.PPM,TYPE(FIXED),RECSIZE(1)' ) input;
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call get_char;
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ID = ch;
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call get_char;
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substr(ID, 2,1) = ch;
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/* Read in the dimensions of the image */
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call get_integer (m);
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call get_integer (n);
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/* Read in the maximum color size used */
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call get_integer (max_color);
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/* The previous call reads in ONE line feed or CR or other terminator */
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/* character. */
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begin;
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declare image (0:m-1,0:n-1) bit (24);
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do i = 0 to hbound(image, 1);
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do j = 0 to hbound(image,2);
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read file (in) into (R);
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read file (in) into (G);
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read file (in) into (B);
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image(i,j) = color;
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end;
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end;
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end;
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get_char: procedure;
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do until (ch ^= ' ');
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read file (in) into (ch);
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end;
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end get_char;
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get_integer: procedure (value);
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declare value fixed binary (31);
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do until (ch = ' ');
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read file (in) into (ch);
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end;
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value = 0;
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do until (is_digit(ch));
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value = value*10 + ch;
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read file (in) into (ch);
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end;
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end get_integer;
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is_digit: procedure (ch) returns (bit(1));
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declare ch character (1);
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return (index('0123456789', ch) > 0);
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end is_digit;
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end test;
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