mirror of
https://github.com/zint/zint
synced 2024-11-16 20:57:25 +13:00
Use 1 bit per pixel for BMP files (Except Ultracode)
Needs more work to reduce Ultracode file size too
This commit is contained in:
Robin Stuart
parent
6579efd271
commit
37fccf1c03
165
backend/bmp.c
165
backend/bmp.c
@ -41,18 +41,31 @@
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INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
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int i, row, column;
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unsigned int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
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int row_size;
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int bits_per_pixel;
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int colour_count;
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unsigned int data_offset, data_size, file_size;
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unsigned char *bitmap_file_start, *bmp_posn;
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unsigned char *bitmap;
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FILE *bmp_file;
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bitmap_file_header_t file_header;
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bitmap_info_header_t info_header;
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color_ref_t bg_color_ref;
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color_ref_t fg_color_ref;
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row_size = 4 * ((24 * symbol->bitmap_width + 31) / 32);
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if (symbol->symbology == BARCODE_ULTRA) {
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bits_per_pixel = 24;
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colour_count = 0;
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} else {
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bits_per_pixel = 1;
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colour_count = 2;
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}
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row_size = 4 * ((bits_per_pixel * symbol->bitmap_width + 31) / 32);
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data_size = symbol->bitmap_height * row_size;
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data_offset = sizeof (bitmap_file_header_t) + sizeof (bitmap_info_header_t);
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if (symbol->symbology != BARCODE_ULTRA) {
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data_offset += (2 * (sizeof(color_ref_t)));
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}
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file_size = data_offset + data_size;
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bitmap_file_start = (unsigned char *) malloc(file_size);
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@ -64,69 +77,82 @@ INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
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bitmap = bitmap_file_start + data_offset;
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fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
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fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
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fgblu = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
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bgred = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
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bggrn = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
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bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
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fg_color_ref.red = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
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fg_color_ref.green = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
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fg_color_ref.blue = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
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fg_color_ref.reserved = 0x00;
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bg_color_ref.red = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
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bg_color_ref.green = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
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bg_color_ref.blue = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
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bg_color_ref.reserved = 0x00;
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/* Pixel Plotting */
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for (row = 0; row < symbol->bitmap_height; row++) {
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for (column = 0; column < symbol->bitmap_width; column++) {
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i = (3 * column) + (row * row_size);
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switch (*(pixelbuf + (symbol->bitmap_width * (symbol->bitmap_height - row - 1)) + column)) {
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case 'W': // White
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bitmap[i] = 255;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 255;
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break;
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case 'C': // Cyan
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bitmap[i] = 255;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 0;
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break;
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case 'B': // Blue
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bitmap[i] = 255;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 0;
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break;
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case 'M': // Magenta
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bitmap[i] = 255;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 255;
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break;
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case 'R': // Red
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bitmap[i] = 0;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 255;
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break;
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case 'Y': // Yellow
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bitmap[i] = 0;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 255;
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break;
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case 'G': // Green
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bitmap[i] = 0;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 0;
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break;
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case 'K': // Black
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bitmap[i] = 0;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 0;
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break;
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case '1':
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bitmap[i] = fgblu;
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bitmap[i + 1] = fggrn;
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bitmap[i + 2] = fgred;
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break;
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default:
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bitmap[i] = bgblu;
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bitmap[i + 1] = bggrn;
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bitmap[i + 2] = bgred;
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break;
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if (symbol->symbology == BARCODE_ULTRA) {
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for (row = 0; row < symbol->bitmap_height; row++) {
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for (column = 0; column < symbol->bitmap_width; column++) {
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i = (3 * column) + (row * row_size);
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switch (*(pixelbuf + (symbol->bitmap_width * (symbol->bitmap_height - row - 1)) + column)) {
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case 'W': // White
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bitmap[i] = 255;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 255;
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break;
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case 'C': // Cyan
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bitmap[i] = 255;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 0;
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break;
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case 'B': // Blue
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bitmap[i] = 255;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 0;
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break;
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case 'M': // Magenta
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bitmap[i] = 255;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 255;
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break;
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case 'R': // Red
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bitmap[i] = 0;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 255;
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break;
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case 'Y': // Yellow
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bitmap[i] = 0;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 255;
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break;
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case 'G': // Green
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bitmap[i] = 0;
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bitmap[i + 1] = 255;
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bitmap[i + 2] = 0;
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break;
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case 'K': // Black
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bitmap[i] = 0;
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bitmap[i + 1] = 0;
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bitmap[i + 2] = 0;
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break;
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case '1':
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bitmap[i] = fg_color_ref.blue;
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bitmap[i + 1] = fg_color_ref.green;
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bitmap[i + 2] = fg_color_ref.red;
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break;
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default:
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bitmap[i] = bg_color_ref.blue;
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bitmap[i + 1] = bg_color_ref.green;
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bitmap[i + 2] = bg_color_ref.red;
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break;
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}
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}
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}
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} else {
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for (row = 0; row < symbol->bitmap_height; row++) {
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for (column = 0; column < symbol->bitmap_width; column++) {
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i = (column / 8) + (row * row_size);
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if ((*(pixelbuf + (symbol->bitmap_width * (symbol->bitmap_height - row - 1)) + column)) == '1') {
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bitmap[i] += (0x01 << (7 - (column % 8)));
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}
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}
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}
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}
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@ -142,18 +168,25 @@ INTERNAL int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf) {
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info_header.width = symbol->bitmap_width;
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info_header.height = symbol->bitmap_height;
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info_header.colour_planes = 1;
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info_header.bits_per_pixel = 24;
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info_header.bits_per_pixel = bits_per_pixel;
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info_header.compression_method = 0; // BI_RGB
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info_header.image_size = 0;
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info_header.horiz_res = 0;
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info_header.vert_res = 0;
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info_header.colours = 0;
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info_header.important_colours = 0;
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info_header.colours = colour_count;
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info_header.important_colours = colour_count;
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bmp_posn = bitmap_file_start;
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memcpy(bitmap_file_start, &file_header, sizeof (bitmap_file_header_t));
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bmp_posn += sizeof (bitmap_file_header_t);
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memcpy(bmp_posn, &info_header, sizeof (bitmap_info_header_t));
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if (symbol->symbology != BARCODE_ULTRA) {
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bmp_posn += sizeof(bitmap_info_header_t);
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memcpy(bmp_posn, &bg_color_ref, sizeof(color_ref_t));
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bmp_posn += sizeof(color_ref_t);
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memcpy(bmp_posn, &fg_color_ref, sizeof(color_ref_t));
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}
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/* Open output file in binary mode */
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if ((symbol->output_options & BARCODE_STDOUT) != 0) {
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@ -65,6 +65,13 @@ extern "C" {
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uint32_t colours;
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uint32_t important_colours;
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} bitmap_info_header_t;
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typedef struct color_ref {
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uint8_t red;
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uint8_t green;
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uint8_t blue;
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uint8_t reserved;
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} color_ref_t;
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#pragma pack ()
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