mirrors/zint
2
0
Fork 0
mirror of https://github.com/zint/zint synced 2024-11-16 20:57:25 +13:00
Code Issues Actions Packages Projects Releases Wiki Activity

Use 1 bit per pixel for BMP files (Except Ultracode)

Browse Source 
Needs more work to reduce Ultracode file size too
This commit is contained in:
Robin Stuart 2020-08-12 00:18:10 +01:00
parent 6579efd271
commit 37fccf1c03
2 changed files with 106 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
backend/bmp.c
View File

@ -41,18 +41,31 @@
INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
int i, row, column;
unsigned int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
int row_size;
int bits_per_pixel;
int colour_count;
unsigned int data_offset, data_size, file_size;
unsigned char *bitmap_file_start, *bmp_posn;
unsigned char *bitmap;
FILE *bmp_file;
bitmap_file_header_t file_header;
bitmap_info_header_t info_header;
color_ref_t bg_color_ref;
color_ref_t fg_color_ref;
row_size = 4 * ((24 * symbol->bitmap_width + 31) / 32);
if (symbol->symbology == BARCODE_ULTRA) {
bits_per_pixel = 24;
colour_count = 0;
} else {
bits_per_pixel = 1;
colour_count = 2;
}
row_size = 4 * ((bits_per_pixel * symbol->bitmap_width + 31) / 32);
data_size = symbol->bitmap_height * row_size;
data_offset = sizeof (bitmap_file_header_t) + sizeof (bitmap_info_header_t);
if (symbol->symbology != BARCODE_ULTRA) {
data_offset += (2 * (sizeof(color_ref_t)));
}
file_size = data_offset + data_size;
bitmap_file_start = (unsigned char *) malloc(file_size);
@ -64,14 +77,17 @@ INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
bitmap = bitmap_file_start + data_offset;
fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
fgblu = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
bgred = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
bggrn = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
fg_color_ref.red = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
fg_color_ref.green = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
fg_color_ref.blue = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
fg_color_ref.reserved = 0x00;
bg_color_ref.red = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
bg_color_ref.green = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
bg_color_ref.blue = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
bg_color_ref.reserved = 0x00;
/* Pixel Plotting */
if (symbol->symbology == BARCODE_ULTRA) {
for (row = 0; row < symbol->bitmap_height; row++) {
for (column = 0; column < symbol->bitmap_width; column++) {
i = (3 * column) + (row * row_size);
@ -117,19 +133,29 @@ INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
bitmap[i + 2] = 0;
break;
case '1':
bitmap[i] = fgblu;
bitmap[i + 1] = fggrn;
bitmap[i + 2] = fgred;
bitmap[i] = fg_color_ref.blue;
bitmap[i + 1] = fg_color_ref.green;
bitmap[i + 2] = fg_color_ref.red;
break;
default:
bitmap[i] = bgblu;
bitmap[i + 1] = bggrn;
bitmap[i + 2] = bgred;
bitmap[i] = bg_color_ref.blue;
bitmap[i + 1] = bg_color_ref.green;
bitmap[i + 2] = bg_color_ref.red;
break;
}
}
}
} else {
for (row = 0; row < symbol->bitmap_height; row++) {
for (column = 0; column < symbol->bitmap_width; column++) {
i = (column / 8) + (row * row_size);
if ((*(pixelbuf + (symbol->bitmap_width * (symbol->bitmap_height - row - 1)) + column)) == '1') {
bitmap[i] += (0x01 << (7 - (column % 8)));
}
}
}
}
symbol->bitmap_byte_length = data_size;
@ -142,19 +168,26 @@ INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
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.bits_per_pixel = bits_per_pixel;
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;
info_header.colours = colour_count;
info_header.important_colours = colour_count;
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));
if (symbol->symbology != BARCODE_ULTRA) {
bmp_posn += sizeof(bitmap_info_header_t);
memcpy(bmp_posn, &bg_color_ref, sizeof(color_ref_t));
bmp_posn += sizeof(color_ref_t);
memcpy(bmp_posn, &fg_color_ref, sizeof(color_ref_t));
}
/* Open output file in binary mode */
if ((symbol->output_options & BARCODE_STDOUT) != 0) {
#ifdef _MSC_VER

7
backend/bmp.h
View File

@ -66,6 +66,13 @@ extern "C" {
uint32_t important_colours;
} bitmap_info_header_t;
typedef struct color_ref {
uint8_t red;
uint8_t green;
uint8_t blue;
uint8_t reserved;
} color_ref_t;
#pragma pack ()
#ifdef __cplusplus