GRASS Programmer's Manual
6.4.2(2012)
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psdriver/Draw_bitmap.c
Go to the documentation of this file.
1
2
#include "
psdriver.h
"
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void
PS_draw_bitmap
(
int
ncols,
int
nrows,
int
threshold,
5
const
unsigned
char
*buf)
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{
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int
i, j;
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output
(
"%d %d %d %d BITMAP\n"
,
cur_x
,
cur_y
, ncols, nrows);
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for
(j = 0; j < nrows; j++) {
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unsigned
int
bit = 0x80;
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unsigned
int
acc = 0;
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for
(i = 0; i < ncols; i++) {
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unsigned
int
k = buf[j * ncols + i];
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if
(k > threshold)
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acc |= bit;
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bit >>= 1;
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if
(!bit) {
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output
(
"%02X"
, acc);
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bit = 0x80;
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acc = 0;
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}
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}
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if
(bit != 0x80)
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output
(
"%02X"
, acc);
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output
(
"\n"
);
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}
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}
lib
psdriver
Draw_bitmap.c
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