1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/*
* Brother QL-570 thermal printing program
* It prints a mono PNG image directly to the printers block device
*
* Copyright 2011 Asbjørn Sloth Tønnesen <code@asbjorn.it>
*
* PNG reading based on:
* A simple libpng example program
* http://zarb.org/~gc/html/libpng.html
* Copyright 2002-2011 Guillaume Cottenceau and contributors.
*
* This software may be freely redistributed under the terms
* of the libpng license.
* http://libpng.org/pub/png/src/libpng-LICENSE.txt
*
* Example usage:
* ./ql570 /dev/usb/lp0 image.png
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdarg.h>
#include <errno.h>
#define PNG_DEBUG 3
#include <png.h>
#define ESC 0x1b
#define DEBUG
FILE * fp;
struct {
int16_t w;
int16_t h;
uint8_t * data;
} typedef pngdata_t;
FILE * ql570_open(const char * path)
{
fp = fopen(path, "r+b");
if (fp == NULL) {
perror("fopen");
exit(EXIT_FAILURE);
}
return fp;
}
void check_img(pngdata_t * img)
{
int i, j;
int lb = (img->w / 8) + (img->w % 8 > 0);
printf("lb: %d\n", lb);
for (i=0;i<img->h;i++) {
for (j=img->w-1;j!=0;j--) {
if (img->data[i*lb+j/8] & (1 << (7-(j % 8)))) {
printf("#");
} else {
printf(" ");
}
}
printf("\n");
}
}
void ql570_print(pngdata_t * img)
{
/* Init */
fprintf(fp, "%c%c", ESC, '@');
/* Set media type */
fprintf(fp, "%c%c%c%c%c%c%c%c%c%c%c%c%c", ESC, 'i', 'z', 0xa6, 0x0a, 29, 0, img->h & 0xff, img->h >> 8, 0, 0, 0, 0);
/* Set cut type */
fprintf(fp, "%c%c%c", ESC, 'i', 'K', 8);
/* Enable cutter */
fprintf(fp, "%c%c%c", ESC, 'i', 'A', 1);
/* Set margin = 0 */
fprintf(fp, "%c%c%c%c%c", ESC, 'i', 'd', 0, 0);
int i, j;
int lb = (img->w / 8) + (img->w % 8 > 0);
for (i=0;i<img->h;i++) {
fprintf(fp, "%c%c%c", 'g', 0x00, 90);
for (j=0;j<lb;j++) {
fprintf(fp, "%c", img->data[i*lb+j]);
}
for (;j<90;j++) {
fprintf(fp, "%c", 0x00);
}
}
/* Print */
fprintf(fp, "%c", 0x1a);
}
void abort_(const char * s, ...)
{
va_list args;
va_start(args, s);
vfprintf(stderr, s, args);
fprintf(stderr, "\n");
va_end(args);
abort();
}
pngdata_t * loadpng(const char * path)
{
png_structp png_ptr;
png_infop info_ptr;
png_bytep * row_pointers;
int width, height, rowbytes;
int x, y;
unsigned char header[8]; // 8 is the maximum size that can be checked
png_byte* ptr;
FILE *fp;
int type = 0;
int lb;
uint8_t * bitmap;
/* open file and test for it being a png */
fp = fopen(path, "rb");
if (!fp)
abort_("[read_png_file] File %s could not be opened for reading", path);
fread(header, 1, 8, fp);
if (png_sig_cmp(header, 0, 8))
abort_("[read_png_file] File %s is not recognized as a PNG file", path);
/* initialize stuff */
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
abort_("[read_png_file] png_create_read_struct failed");
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
abort_("[read_png_file] png_create_info_struct failed");
if (setjmp(png_jmpbuf(png_ptr)))
abort_("[read_png_file] Error during init_io");
png_init_io(png_ptr, fp);
png_set_sig_bytes(png_ptr, 8);
png_read_info(png_ptr, info_ptr);
if (png_get_channels(png_ptr, info_ptr) == 1
&& png_get_bit_depth(png_ptr, info_ptr) == 1) {
type = 1;
} else if (png_get_channels(png_ptr, info_ptr) == 4
&& png_get_bit_depth(png_ptr, info_ptr) == 8) {
type = 2;
}
if (type == 0) {
fprintf(stderr, "Invalid PNG! Only mono or mono 4x8-bit RGBA PNG files are allowed\n");
exit(1);
}
width = png_get_image_width(png_ptr, info_ptr);
height = png_get_image_height(png_ptr, info_ptr);
png_read_update_info(png_ptr, info_ptr);
/* read file */
if (setjmp(png_jmpbuf(png_ptr)))
abort_("[read_png_file] Error during read_image");
row_pointers = (png_bytep*) malloc(sizeof(png_bytep) * height);
rowbytes = type == 1 ? (width / 8) + (width % 8 > 0) : width << 2;
for (y=0; y<height; y++)
row_pointers[y] = (png_byte*) malloc(rowbytes);
png_read_image(png_ptr, row_pointers);
fclose(fp);
lb = (height / 8) + (height % 8 > 0);
bitmap = malloc(width*lb);
memset(bitmap, 0, width*lb);
#define heat_on(x, y) bitmap[(x*lb)+(y/8)] |= 1 << (7-(y%8))
for (y=0; y<height; y++) {
png_byte* row = row_pointers[y];
for (x=0; x<width; x++) {
if (type == 1) {
ptr = &(row[x/8]);
} else {
ptr = &(row[x<<2]);
}
if ((ptr[0] & (1 << (7-(x%8)))) == 0) {
heat_on(x, y);
}
}
}
pngdata_t * ret = malloc(sizeof(pngdata_t));
ret->w = height;
ret->h = width;
ret->data = bitmap;
return ret;
}
int main(int argc, const char ** argv)
{
if (argc <= 2) {
fprintf(stderr, "Usage: %s printer pngfile\n", argv[0]);
exit(EXIT_FAILURE);
}
ql570_open(argv[1]);
pngdata_t * data = loadpng(argv[2]);
//check_img(data);
printf("w: %d\th: %d\n", data->w, data->h);
//check_img(data);
ql570_print(data);
return EXIT_SUCCESS;
}
|
