From: Asbjørn Sloth Tønnesen <asbjorn@asbjorn.biz>
Date: Wed, 7 Mar 2012 16:53:36 +0000 (+0000)
Subject: Initial commit
X-Git-Url: http://git.asbjorn.it/?a=commitdiff_plain;h=3b32783f4c48169c0bf22e67a81e531aa90a2c33;p=ql570.git
Initial commit
---
3b32783f4c48169c0bf22e67a81e531aa90a2c33
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..c2ad0b4
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+CFLAGS=-g
+CFLAGS+= $(shell pkg-config --cflags libpng)
+LDFLAGS+= $(shell pkg-config --libs libpng)
+all: ql570
diff --git a/ql570.c b/ql570.c
new file mode 100644
index 0000000..8034ca7
--- /dev/null
+++ b/ql570.c
@@ -0,0 +1,226 @@
+/*
+ * 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 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;
+}