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Add buffer option

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This commit is contained in:
hooper114
2009-11-08 21:24:32 +00:00
parent 13a8a80136
commit 7c1d8fdc5b
4 changed files with 261 additions and 10 deletions
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201
backend/png.c
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@@ -2,7 +2,7 @@
/*
libzint - the open source barcode library
Copyright (C) 2008 Robin Stuart <robin@zint.org.uk>
Copyright (C) 2009 Robin Stuart <robin@zint.org.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -19,6 +19,15 @@
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
This file initially included the code to output barcodes to PNG images. To this has been
added routines to ouput the symbol in a byte array for manipulation within an external
program - the difference can be seen as "PNG mode" and "BMP mode". The reason they have been
lumped together here is because they use much the same functions and so it saves memory to
put them together. The problem is that it means the "BMP mode" functions are not available
unless PNG encoding is enabled. This is a compromise and I hope it doesn't cause anybody problems.
*/
#include <stdio.h>
#ifdef _MSC_VER
#include <fcntl.h>
@@ -41,6 +50,9 @@
#define SSET "0123456789ABCDEF"
#define PNG_DATA 100
#define BMP_DATA 200
struct mainprog_info_type {
long width;
long height;
@@ -65,7 +77,7 @@ static void writepng_error_handler(png_structp png_ptr, png_const_charp msg)
longjmp(graphic->jmpbuf, 1);
}
int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle)
int png_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle)
{
struct mainprog_info_type wpng_info;
struct mainprog_info_type *graphic;
@@ -297,6 +309,165 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
return 0;
}
int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle)
{
unsigned long rowbytes;
int i, row, column, errno;
int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
switch(rotate_angle) {
case 0:
case 180:
symbol->bitmap_width = image_width;
symbol->bitmap_height = image_height;
break;
case 90:
case 270:
symbol->bitmap_width = image_height;
symbol->bitmap_height = image_width;
break;
}
if (symbol->bitmap != NULL)
free(symbol->bitmap);
symbol->bitmap = (char *) malloc(image_width * image_height * 3);
/* sort out colour options */
to_upper((unsigned char*)symbol->fgcolour);
to_upper((unsigned char*)symbol->bgcolour);
if(strlen(symbol->fgcolour) != 6) {
strcpy(symbol->errtxt, "Malformed foreground colour target");
return ERROR_INVALID_OPTION;
}
if(strlen(symbol->bgcolour) != 6) {
strcpy(symbol->errtxt, "Malformed background colour target");
return ERROR_INVALID_OPTION;
}
errno = is_sane(SSET, (unsigned char*)symbol->fgcolour, strlen(symbol->fgcolour));
if (errno == ERROR_INVALID_DATA) {
strcpy(symbol->errtxt, "Malformed foreground colour target");
return ERROR_INVALID_OPTION;
}
errno = is_sane(SSET, (unsigned char*)symbol->bgcolour, strlen(symbol->fgcolour));
if (errno == ERROR_INVALID_DATA) {
strcpy(symbol->errtxt, "Malformed background colour target");
return ERROR_INVALID_OPTION;
}
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]);
/* set rowbytes - depends on picture depth */
rowbytes = symbol->bitmap_width * 3;
/* Pixel Plotting */
i = 0;
switch(rotate_angle) {
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))
{
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
break;
}
}
}
break;
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))
{
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
break;
}
}
}
break;
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)))
{
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
break;
}
}
}
break;
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)))
{
case '1':
symbol->bitmap[i++] = fgred;
symbol->bitmap[i++] = fggrn;
symbol->bitmap[i++] = fgblu;
break;
default:
symbol->bitmap[i++] = bgred;
symbol->bitmap[i++] = bggrn;
symbol->bitmap[i++] = bgblu;
break;
}
}
}
break;
}
return 0;
}
int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle, int image_type)
{
int error_number;
if(image_type == PNG_DATA) {
error_number = png_pixel_plot(symbol, image_height, image_width, pixelbuf, rotate_angle);
} else {
error_number = bmp_pixel_plot(symbol, image_height, image_width, pixelbuf, rotate_angle);
}
return error_number;
}
void draw_bar(char *pixelbuf, int xpos, int xlen, int ypos, int ylen, int image_width, int image_height)
{
/* Draw a rectangle */
@@ -412,7 +583,7 @@ void draw_string(char *pixbuf, char input_string[], int xposn, int yposn, int im
}
int maxi_png_plot(struct zint_symbol *symbol, int rotate_angle)
int maxi_png_plot(struct zint_symbol *symbol, int rotate_angle, int data_type)
{
int i, row, column, xposn, yposn;
int image_height, image_width;
@@ -466,7 +637,7 @@ int maxi_png_plot(struct zint_symbol *symbol, int rotate_angle)
draw_bar(pixelbuf, 300 + ((symbol->border_width + symbol->whitespace_width + symbol->whitespace_width) * scaler), symbol->border_width * scaler, 0, image_height, image_width, image_height);
}
error_number=png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle);
error_number=png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle, data_type);
free(pixelbuf);
return error_number;
}
@@ -504,7 +675,7 @@ void to_latin1(unsigned char source[], unsigned char preprocessed[])
return;
}
int png_plot(struct zint_symbol *symbol, int rotate_angle)
int png_plot(struct zint_symbol *symbol, int rotate_angle, int data_type)
{
int textdone, main_width, comp_offset, large_bar_count;
char textpart[10], addon[6];
@@ -912,7 +1083,7 @@ int png_plot(struct zint_symbol *symbol, int rotate_angle)
draw_string(pixelbuf, (char*)local_text, textpos, default_text_posn, image_width, image_height);
}
error_number=png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle);
error_number=png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle, data_type);
free(pixelbuf);
return error_number;
}
@@ -922,10 +1093,24 @@ int png_handle(struct zint_symbol *symbol, int rotate_angle)
int error;
if(symbol->symbology == BARCODE_MAXICODE) {
error = maxi_png_plot(symbol, rotate_angle);
error = maxi_png_plot(symbol, rotate_angle, PNG_DATA);
} else {
error = png_plot(symbol, rotate_angle);
error = png_plot(symbol, rotate_angle, PNG_DATA);
}
return error;
}
int bmp_handle(struct zint_symbol *symbol, int rotate_angle)
{
int error;
if(symbol->symbology == BARCODE_MAXICODE) {
error = maxi_png_plot(symbol, rotate_angle, BMP_DATA);
} else {
error = png_plot(symbol, rotate_angle, BMP_DATA);
}
return error;
}