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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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126
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:
@@ -331,9 +338,9 @@ 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;
}
@@ -598,7 +660,7 @@ void draw_letter(char *pixelbuf, unsigned char letter, int xposn, int yposn, int
break;
case 2: // bold font -> twice the regular font
{
{
char * linePtr;
max_x = 7;
max_y = 14;