mirror of
https://github.com/zint/zint
synced 2024-11-16 20:57:25 +13:00
add PNG image rotation
This commit is contained in:
hooper114
parent
108c317baa
commit
e1db5bfca0
122
backend/png.c
122
backend/png.c
@ -53,7 +53,7 @@ static void writepng_error_handler(png_structp png_ptr, png_const_charp msg)
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longjmp(graphic->jmpbuf, 1);
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}
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int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf)
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int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle)
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{
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#ifndef NO_PNG
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struct mainprog_info_type wpng_info;
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@ -68,8 +68,18 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
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int i, k, offset, row, column, errno;
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int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
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switch(rotate_angle) {
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case 0:
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case 180:
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graphic->width = image_width;
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graphic->height = image_height;
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break;
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case 90:
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case 270:
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graphic->width = image_height;
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graphic->height = image_width;
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break;
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}
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/* sort out colour options */
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to_upper(symbol->fgcolour);
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@ -152,6 +162,8 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
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/* Pixel Plotting */
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switch(rotate_angle) {
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case 0: /* Plot the right way up */
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for(row = 0; row < image_height; row++) {
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for(column = 0; column < image_width; column++) {
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i = column * 3;
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@ -170,11 +182,88 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
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}
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}
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#endif
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/* write row contents to file */
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image_data = outdata;
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png_write_row(png_ptr, image_data);
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}
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break;
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case 90: /* Plot 90 degrees clockwise */
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for(row = 0; row < image_width; row++) {
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for(column = 0; column < image_height; column++) {
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i = column * 3;
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switch(*(pixelbuf + (image_width * (image_height - column - 1)) + row))
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{
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case '1':
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outdata[i] = fgred;
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outdata[i + 1] = fggrn;
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outdata[i + 2] = fgblu;
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break;
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default:
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outdata[i] = bgred;
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outdata[i + 1] = bggrn;
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outdata[i + 2] = bgblu;
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break;
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}
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}
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/* write row contents to file */
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image_data = outdata;
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png_write_row(png_ptr, image_data);
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}
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break;
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case 180: /* Plot upside down */
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for(row = 0; row < image_height; row++) {
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for(column = 0; column < image_width; column++) {
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i = column * 3;
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switch(*(pixelbuf + (image_width * (image_height - row - 1)) + (image_width - column - 1)))
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{
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case '1':
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outdata[i] = fgred;
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outdata[i + 1] = fggrn;
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outdata[i + 2] = fgblu;
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break;
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default:
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outdata[i] = bgred;
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outdata[i + 1] = bggrn;
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outdata[i + 2] = bgblu;
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break;
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}
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}
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/* write row contents to file */
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image_data = outdata;
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png_write_row(png_ptr, image_data);
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}
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break;
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case 270: /* Plot 90 degrees anti-clockwise */
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for(row = 0; row < image_width; row++) {
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for(column = 0; column < image_height; column++) {
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i = column * 3;
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switch(*(pixelbuf + (image_width * column) + (image_width - row - 1)))
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{
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case '1':
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outdata[i] = fgred;
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outdata[i + 1] = fggrn;
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outdata[i + 2] = fgblu;
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break;
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default:
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outdata[i] = bgred;
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outdata[i + 1] = bggrn;
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outdata[i + 2] = bgblu;
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break;
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}
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}
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/* write row contents to file */
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image_data = outdata;
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png_write_row(png_ptr, image_data);
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}
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break;
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}
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/* End the file */
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png_write_end(png_ptr, NULL);
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@ -182,7 +271,7 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
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/* make sure we have disengaged */
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if (png_ptr && info_ptr) png_destroy_write_struct(&png_ptr, &info_ptr);
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fclose(wpng_info.outfile);
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#endif
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return 0;
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}
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@ -230,7 +319,7 @@ void draw_hexagon(char *pixelbuf, int xposn, int yposn)
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}
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}
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void draw_letter(char *pixelbuf, char letter, int xposn, int yposn, int image_width, int image_height)
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void draw_letter(char *pixelbuf, unsigned char letter, int xposn, int yposn, int image_width, int image_height)
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{
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/* Put a letter into a position */
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int skip, i, j, glyph_no, alphabet;
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@ -249,7 +338,7 @@ void draw_letter(char *pixelbuf, char letter, int xposn, int yposn, int image_wi
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glyph_no = letter - 33;
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}
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for(i = 0; i < 13; i++) {
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for(i = 0; i <= 13; i++) {
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for(j = 0; j < 7; j++) {
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if(alphabet == 0) {
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if(ascii_font[(glyph_no * 7) + (i * 665) + j - 1] == 1) {
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@ -265,7 +354,7 @@ void draw_letter(char *pixelbuf, char letter, int xposn, int yposn, int image_wi
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}
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}
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void draw_string(char *pixbuf, char input_string[], int xposn, int yposn, int image_width, int image_height)
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void draw_string(char *pixbuf, unsigned char input_string[], int xposn, int yposn, int image_width, int image_height)
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{
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/* Plot a string into the pixel buffer */
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int i, string_length, string_left_hand;
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@ -276,9 +365,10 @@ void draw_string(char *pixbuf, char input_string[], int xposn, int yposn, int im
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for(i = 0; i < string_length; i++) {
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draw_letter(pixbuf, input_string[i], string_left_hand + (i * 7), yposn, image_width, image_height);
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}
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}
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int maxi_png_plot(struct zint_symbol *symbol)
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int maxi_png_plot(struct zint_symbol *symbol, int rotate_angle)
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{
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int i, row, column, xposn, yposn;
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int image_height, image_width;
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@ -315,10 +405,10 @@ int maxi_png_plot(struct zint_symbol *symbol)
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}
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}
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png_to_file(symbol, image_height, image_width, pixelbuf);
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png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle);
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}
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int png_plot(struct zint_symbol *symbol)
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int png_plot(struct zint_symbol *symbol, int rotate_angle)
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{
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int textdone, main_width, comp_offset, large_bar_count;
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char textpart[10], addon[6];
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@ -565,7 +655,6 @@ int png_plot(struct zint_symbol *symbol)
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if(latch == 1) {
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/* a bar */
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draw_bar(pixelbuf, (i + xoffset - comp_offset), block_width, (4 + (int)yoffset), 5, image_width, image_height);
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/*fprintf(feps, "TB %d.00 %d.00 TR\n", i + xoffset - comp_offset, block_width);*/
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latch = 0;
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} else {
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/* a space */
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@ -689,5 +778,18 @@ int png_plot(struct zint_symbol *symbol)
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draw_string(pixelbuf, symbol->text, textpos, (image_height - 17), image_width, image_height);
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}
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png_to_file(symbol, image_height, image_width, pixelbuf);
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png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle);
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}
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int png_handle(struct zint_symbol *symbol, int rotate_angle)
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{
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int error;
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if(symbol->symbology == BARCODE_MAXICODE) {
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error = maxi_png_plot(symbol, rotate_angle);
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} else {
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error = png_plot(symbol, rotate_angle);
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}
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return error;
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}
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