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Add bitmap (BMP) file support

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And upgrade symbol->bitmap structure to reflect BMP format
Based on work by Adrian Keller
This commit is contained in:
Robin Stuart 2016-07-18 20:14:56 +01:00
parent e39d2ff915
commit 75384ca009
2 changed files with 161 additions and 32 deletions
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67
backend/bmp.h Normal file
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@ -0,0 +1,67 @@
/* zint.h - definitions for libzint
libzint - the open source barcode library
Copyright (C) 2009-2016 Robin Stuart <rstuart114@gmail.com>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the project nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#ifndef BMP_H
#define BMP_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
typedef struct bitmap_file_header {
uint16_t header_field;
uint32_t file_size;
uint32_t reserved;
uint32_t data_offset;
} __attribute__((__packed__ )) bitmap_file_header_t;
typedef struct bitmap_info_header {
uint32_t header_size;
int32_t width;
int32_t height;
uint16_t colour_planes;
uint16_t bits_per_pixel;
uint32_t compression_method;
uint32_t image_size;
int32_t horiz_res;
int32_t vert_res;
uint32_t colours;
uint32_t important_colours;
} __attribute__((__packed__ )) bitmap_info_header_t;
#ifdef __cplusplus
}
#endif
#endif /* BMP_H */

122
backend/png.c
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@ -52,6 +52,9 @@
#include "font.h" /* Font for human readable text */
#include "bmp.h" /* Bitmap header structure */
#include <math.h>
#define SSET "0123456789ABCDEF"
#define PNG_DATA 100
@ -315,6 +318,10 @@ int png_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle) {
int i, row, column, errno;
int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
int row_size;
unsigned int data_size;
unsigned char *bitmap_file_start, *bmp_posn;
FILE *bmp_file;
switch (rotate_angle) {
case 0:
@ -332,8 +339,8 @@ int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
if (symbol->bitmap != NULL)
free(symbol->bitmap);
symbol->bitmap = (char *) malloc(image_width * image_height * 3);
row_size = 4 * floor((24 * symbol->bitmap_width + 31) / 32);
symbol->bitmap = (char *) malloc(row_size * symbol->bitmap_height);
/* sort out colour options */
to_upper((unsigned char*) symbol->fgcolour);
@ -371,16 +378,17 @@ int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
case 0: /* Plot the right way up */
for (row = 0; row < image_height; row++) {
for (column = 0; column < image_width; column++) {
switch (*(pixelbuf + (image_width * row) + column)) {
i = (3 * column) + (row * row_size);
switch (*(pixelbuf + (image_width * (image_height - row - 1)) + column)) {
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
symbol->bitmap[i] = fgblu;
symbol->bitmap[i + 1] = fggrn;
symbol->bitmap[i + 2] = fgred;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
symbol->bitmap[i] = bgblu;
symbol->bitmap[i + 1] = bggrn;
symbol->bitmap[i + 2] = bgred;
break;
}
@ -390,16 +398,17 @@ int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
case 90: /* Plot 90 degrees clockwise */
for (row = 0; row < image_width; row++) {
for (column = 0; column < image_height; column++) {
switch (*(pixelbuf + (image_width * (image_height - column - 1)) + row)) {
i = (3 * column) + (row * row_size);
switch (*(pixelbuf + (image_width * (image_height - column - 1)) + (image_width - row - 1))) {
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
symbol->bitmap[i] = fgblu;
symbol->bitmap[i + 1] = fggrn;
symbol->bitmap[i + 2] = fgred;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
symbol->bitmap[i] = bgblu;
symbol->bitmap[i + 1] = bggrn;
symbol->bitmap[i + 2] = bgred;
break;
}
@ -409,16 +418,17 @@ int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
case 180: /* Plot upside down */
for (row = 0; row < image_height; row++) {
for (column = 0; column < image_width; column++) {
switch (*(pixelbuf + (image_width * (image_height - row - 1)) + (image_width - column - 1))) {
i = (3 * column) + (row * row_size);
switch (*(pixelbuf + (image_width * row) + (image_width - column - 1))) {
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
symbol->bitmap[i] = fgblu;
symbol->bitmap[i + 1] = fggrn;
symbol->bitmap[i + 2] = fgred;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
symbol->bitmap[i] = bgblu;
symbol->bitmap[i + 1] = bggrn;
symbol->bitmap[i + 2] = bgred;
break;
}
@ -428,16 +438,17 @@ int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
case 270: /* Plot 90 degrees anti-clockwise */
for (row = 0; row < image_width; row++) {
for (column = 0; column < image_height; column++) {
switch (*(pixelbuf + (image_width * column) + (image_width - row - 1))) {
i = (3 * column) + (row * row_size);
switch (*(pixelbuf + (image_width * column) + row)) {
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
symbol->bitmap[i] = fgblu;
symbol->bitmap[i + 1] = fggrn;
symbol->bitmap[i + 2] = fgred;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
symbol->bitmap[i] = bgblu;
symbol->bitmap[i + 1] = bggrn;
symbol->bitmap[i + 2] = bgred;
break;
}
@ -446,6 +457,57 @@ int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
break;
}
data_size = symbol->bitmap_height * row_size;
bitmap_file_header_t file_header;
bitmap_info_header_t info_header;
file_header.header_field = 0x4d42; // "BM"
file_header.file_size = sizeof(bitmap_file_header_t) + sizeof(bitmap_info_header_t) + data_size;
file_header.reserved = 0;
file_header.data_offset = sizeof(bitmap_file_header_t) + sizeof(bitmap_info_header_t);
info_header.header_size = sizeof(bitmap_info_header_t);
info_header.width = symbol->bitmap_width;
info_header.height = symbol->bitmap_height;
info_header.colour_planes = 1;
info_header.bits_per_pixel = 24;
info_header.compression_method = 0; // BI_RGB
info_header.image_size = 0;
info_header.horiz_res = 0;
info_header.vert_res = 0;
info_header.colours = 0;
info_header.important_colours = 0;
bitmap_file_start = (unsigned char*)malloc(file_header.file_size);
memset(bitmap_file_start, 0xff, file_header.file_size);
bmp_posn = bitmap_file_start;
memcpy( bitmap_file_start, &file_header, sizeof(bitmap_file_header_t));
bmp_posn += sizeof(bitmap_file_header_t);
memcpy(bmp_posn, &info_header, sizeof(bitmap_info_header_t) );
bmp_posn += sizeof(bitmap_info_header_t);
memcpy(bmp_posn, symbol->bitmap, data_size);
/* Open output file in binary mode */
if ((symbol->output_options & BARCODE_STDOUT) != 0) {
#ifdef _MSC_VER
if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
strcpy(symbol->errtxt, "Can't open output file");
return ZINT_ERROR_FILE_ACCESS;
}
#endif
bmp_file = stdout;
} else {
if (!(bmp_file = fopen(symbol->outfile, "wb"))) {
strcpy(symbol->errtxt, "Can't open output file");
return ZINT_ERROR_FILE_ACCESS;
}
}
fwrite(bitmap_file_start, file_header.file_size, 1, bmp_file);
fclose(bmp_file);
return 0;
}