GRASS GIS 8 Programmer's Manual 8.4.1(2025)-45ca3179ab
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psdriver/draw_bitmap.c
Go to the documentation of this file.
1#include "psdriver.h"
2
3void PS_Bitmap(int ncols, int nrows, int threshold, const unsigned char *buf)
4{
5 int i, j;
6
7 output("%d %d %d %d BITMAP\n", cur_x, cur_y, ncols, nrows);
8
9 for (j = 0; j < nrows; j++) {
10 unsigned int bit = 0x80;
11 unsigned int acc = 0;
12
13 for (i = 0; i < ncols; i++) {
14 unsigned int k = buf[j * ncols + i];
15
16 if (k > (unsigned int)threshold)
17 acc |= bit;
18
19 bit >>= 1;
20
21 if (!bit) {
22 output("%02X", acc);
23 bit = 0x80;
24 acc = 0;
25 }
26 }
27
28 if (bit != 0x80)
29 output("%02X", acc);
30
31 output("\n");
32 }
33}
double cur_x
Definition driver/init.c:32
double cur_y
Definition driver/init.c:33
void PS_Bitmap(int ncols, int nrows, int threshold, const unsigned char *buf)
void output(const char *fmt,...)