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add PNG image rotation

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This commit is contained in:
hooper114 2008-09-02 19:46:34 +00:00
parent 108c317baa
commit e1db5bfca0
1 changed files with 134 additions and 32 deletions
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166
backend/png.c
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@ -53,7 +53,7 @@ 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 png_to_file(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle)
{
#ifndef NO_PNG
struct mainprog_info_type wpng_info;
@ -68,8 +68,18 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
int i, k, offset, row, column, errno;
int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
graphic->width = image_width;
graphic->height = image_height;
switch(rotate_angle) {
case 0:
case 180:
graphic->width = image_width;
graphic->height = image_height;
break;
case 90:
case 270:
graphic->width = image_height;
graphic->height = image_width;
break;
}
/* sort out colour options */
to_upper(symbol->fgcolour);
@ -152,28 +162,107 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
/* Pixel Plotting */
for(row = 0; row < image_height; row++) {
for(column = 0; column < image_width; column++) {
i = column * 3;
switch(*(pixelbuf + (image_width * row) + column))
{
case '1':
outdata[i] = fgred;
outdata[i + 1] = fggrn;
outdata[i + 2] = fgblu;
break;
default:
outdata[i] = bgred;
outdata[i + 1] = bggrn;
outdata[i + 2] = bgblu;
break;
switch(rotate_angle) {
case 0: /* Plot the right way up */
for(row = 0; row < image_height; row++) {
for(column = 0; column < image_width; column++) {
i = column * 3;
switch(*(pixelbuf + (image_width * row) + column))
{
case '1':
outdata[i] = fgred;
outdata[i + 1] = fggrn;
outdata[i + 2] = fgblu;
break;
default:
outdata[i] = bgred;
outdata[i + 1] = bggrn;
outdata[i + 2] = bgblu;
break;
}
}
#endif
/* write row contents to file */
image_data = outdata;
png_write_row(png_ptr, image_data);
}
}
break;
case 90: /* Plot 90 degrees clockwise */
for(row = 0; row < image_width; row++) {
for(column = 0; column < image_height; column++) {
i = column * 3;
switch(*(pixelbuf + (image_width * (image_height - column - 1)) + row))
{
case '1':
outdata[i] = fgred;
outdata[i + 1] = fggrn;
outdata[i + 2] = fgblu;
break;
default:
outdata[i] = bgred;
outdata[i + 1] = bggrn;
outdata[i + 2] = bgblu;
break;
}
}
/* write row contents to file */
image_data = outdata;
png_write_row(png_ptr, image_data);
}
break;
case 180: /* Plot upside down */
for(row = 0; row < image_height; row++) {
for(column = 0; column < image_width; column++) {
i = column * 3;
switch(*(pixelbuf + (image_width * (image_height - row - 1)) + (image_width - column - 1)))
{
case '1':
outdata[i] = fgred;
outdata[i + 1] = fggrn;
outdata[i + 2] = fgblu;
break;
default:
outdata[i] = bgred;
outdata[i + 1] = bggrn;
outdata[i + 2] = bgblu;
break;
}
}
/* write row contents to file */
image_data = outdata;
png_write_row(png_ptr, image_data);
}
break;
case 270: /* Plot 90 degrees anti-clockwise */
for(row = 0; row < image_width; row++) {
for(column = 0; column < image_height; column++) {
i = column * 3;
switch(*(pixelbuf + (image_width * column) + (image_width - row - 1)))
{
case '1':
outdata[i] = fgred;
outdata[i + 1] = fggrn;
outdata[i + 2] = fgblu;
break;
default:
outdata[i] = bgred;
outdata[i + 1] = bggrn;
outdata[i + 2] = bgblu;
break;
/* write row contents to file */
image_data = outdata;
png_write_row(png_ptr, image_data);
}
}
/* write row contents to file */
image_data = outdata;
png_write_row(png_ptr, image_data);
}
break;
}
/* End the file */
@ -182,7 +271,7 @@ int png_to_file(struct zint_symbol *symbol, int image_height, int image_width, c
/* make sure we have disengaged */
if (png_ptr && info_ptr) png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(wpng_info.outfile);
#endif
return 0;
}
@ -230,7 +319,7 @@ void draw_hexagon(char *pixelbuf, int xposn, int yposn)
}
}
void draw_letter(char *pixelbuf, char letter, int xposn, int yposn, int image_width, int image_height)
void draw_letter(char *pixelbuf, unsigned char letter, int xposn, int yposn, int image_width, int image_height)
{
/* Put a letter into a position */
int skip, i, j, glyph_no, alphabet;
@ -249,7 +338,7 @@ void draw_letter(char *pixelbuf, char letter, int xposn, int yposn, int image_wi
glyph_no = letter - 33;
}
for(i = 0; i < 13; i++) {
for(i = 0; i <= 13; i++) {
for(j = 0; j < 7; j++) {
if(alphabet == 0) {
if(ascii_font[(glyph_no * 7) + (i * 665) + j - 1] == 1) {
@ -265,7 +354,7 @@ void draw_letter(char *pixelbuf, char letter, int xposn, int yposn, int image_wi
}
}
void draw_string(char *pixbuf, char input_string[], int xposn, int yposn, int image_width, int image_height)
void draw_string(char *pixbuf, unsigned char input_string[], int xposn, int yposn, int image_width, int image_height)
{
/* Plot a string into the pixel buffer */
int i, string_length, string_left_hand;
@ -276,9 +365,10 @@ void draw_string(char *pixbuf, char input_string[], int xposn, int yposn, int im
for(i = 0; i < string_length; i++) {
draw_letter(pixbuf, input_string[i], string_left_hand + (i * 7), yposn, image_width, image_height);
}
}
int maxi_png_plot(struct zint_symbol *symbol)
int maxi_png_plot(struct zint_symbol *symbol, int rotate_angle)
{
int i, row, column, xposn, yposn;
int image_height, image_width;
@ -315,10 +405,10 @@ int maxi_png_plot(struct zint_symbol *symbol)
}
}
png_to_file(symbol, image_height, image_width, pixelbuf);
png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle);
}
int png_plot(struct zint_symbol *symbol)
int png_plot(struct zint_symbol *symbol, int rotate_angle)
{
int textdone, main_width, comp_offset, large_bar_count;
char textpart[10], addon[6];
@ -565,7 +655,6 @@ int png_plot(struct zint_symbol *symbol)
if(latch == 1) {
/* a bar */
draw_bar(pixelbuf, (i + xoffset - comp_offset), block_width, (4 + (int)yoffset), 5, image_width, image_height);
/*fprintf(feps, "TB %d.00 %d.00 TR\n", i + xoffset - comp_offset, block_width);*/
latch = 0;
} else {
/* a space */
@ -689,5 +778,18 @@ int png_plot(struct zint_symbol *symbol)
draw_string(pixelbuf, symbol->text, textpos, (image_height - 17), image_width, image_height);
}
png_to_file(symbol, image_height, image_width, pixelbuf);
png_to_file(symbol, image_height, image_width, pixelbuf, rotate_angle);
}
int png_handle(struct zint_symbol *symbol, int rotate_angle)
{
int error;
if(symbol->symbology == BARCODE_MAXICODE) {
error = maxi_png_plot(symbol, rotate_angle);
} else {
error = png_plot(symbol, rotate_angle);
}
return error;
}