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Consolidate raster image rotation and colour sanity checks

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This commit is contained in:
Robin Stuart 2016-09-11 08:42:31 +01:00
parent 71a30a9031
commit e0402ba434
5 changed files with 143 additions and 438 deletions
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94
backend/raster.c
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@ -47,31 +47,109 @@
#include "font.h" /* Font for human readable text */
#ifndef NO_PNG
extern int png_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle);
extern int png_pixel_plot(struct zint_symbol *symbol, char *pixelbuf);
#endif /* NO_PNG */
extern int bmp_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle);
extern int pcx_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle);
extern int gif_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle);
extern int bmp_pixel_plot(struct zint_symbol *symbol, char *pixelbuf);
extern int pcx_pixel_plot(struct zint_symbol *symbol, char *pixelbuf);
extern int gif_pixel_plot(struct zint_symbol *symbol, char *pixelbuf);
int save_raster_image_to_file(struct zint_symbol *symbol, int image_height, int image_width, char *pixelbuf, int rotate_angle, int image_type) {
int error_number;
int row, column;
#ifndef _MSC_VER
char rotated_pixbuf[image_height * image_width];
#else
char* rrotated_pixbuf = (char *) _alloca((image_height * image_width) * sizeof (char));
#endif /* _MSC_VER */
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;
}
/* 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 ZINT_ERROR_INVALID_OPTION;
}
if (strlen(symbol->bgcolour) != 6) {
strcpy(symbol->errtxt, "Malformed background colour target");
return ZINT_ERROR_INVALID_OPTION;
}
error_number = is_sane(SSET, (unsigned char*) symbol->fgcolour, strlen(symbol->fgcolour));
if (error_number == ZINT_ERROR_INVALID_DATA) {
strcpy(symbol->errtxt, "Malformed foreground colour target");
return ZINT_ERROR_INVALID_OPTION;
}
error_number = is_sane(SSET, (unsigned char*) symbol->bgcolour, strlen(symbol->fgcolour));
if (error_number == ZINT_ERROR_INVALID_DATA) {
strcpy(symbol->errtxt, "Malformed background colour target");
return ZINT_ERROR_INVALID_OPTION;
}
/* Rotate image before plotting */
switch (rotate_angle) {
case 0: /* Plot the right way up */
for (row = 0; row < image_height; row++) {
for (column = 0; column < image_width; column++) {
rotated_pixbuf[(row * image_width) + column] =
*(pixelbuf + (image_width * row) + column);
}
}
break;
case 90: /* Plot 90 degrees clockwise */
for (row = 0; row < image_width; row++) {
for (column = 0; column < image_height; column++) {
rotated_pixbuf[(row * image_height) + column] =
*(pixelbuf + (image_width * (image_height - column - 1)) + row);
}
}
break;
case 180: /* Plot upside down */
for (row = 0; row < image_height; row++) {
for (column = 0; column < image_width; column++) {
rotated_pixbuf[(row * image_width) + column] =
*(pixelbuf + (image_width * (image_height - row - 1)) + (image_width - column - 1));
}
}
break;
case 270: /* Plot 90 degrees anti-clockwise */
for (row = 0; row < image_width; row++) {
for (column = 0; column < image_height; column++) {
rotated_pixbuf[(row * image_height) + column] =
*(pixelbuf + (image_width * column) + (image_width - row - 1));
}
}
break;
}
switch (image_type) {
case OUT_PNG_FILE:
#ifndef NO_PNG
error_number = png_pixel_plot(symbol, image_height, image_width, pixelbuf, rotate_angle);
error_number = png_pixel_plot(symbol, rotated_pixbuf);
#else
return ZINT_ERROR_INVALID_OPTION;
#endif
break;
case OUT_PCX_FILE:
error_number = pcx_pixel_plot(symbol, image_height, image_width, pixelbuf, rotate_angle);
error_number = pcx_pixel_plot(symbol, rotated_pixbuf);
break;
case OUT_GIF_FILE:
error_number = gif_pixel_plot(symbol, image_height, image_width, pixelbuf, rotate_angle);
error_number = gif_pixel_plot(symbol, rotated_pixbuf);
break;
default:
error_number = bmp_pixel_plot(symbol, image_height, image_width, pixelbuf, rotate_angle);
error_number = bmp_pixel_plot(symbol, rotated_pixbuf);
break;
}