diff options
Diffstat (limited to 'src/image.c')
| -rw-r--r-- | src/image.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/src/image.c b/src/image.c new file mode 100644 index 0000000..4295ab1 --- /dev/null +++ b/src/image.c @@ -0,0 +1,222 @@ +#include <stdbool.h> +#include <stdlib.h> +#include <cairo/cairo.h> +#include <pango/pangocairo.h> +#include <wand/MagickWand.h> +#include "draw.h" + + +// Used for MagickWand +#define ThrowWandException(wand) \ +{ \ + char \ + *description; \ + \ + ExceptionType \ + severity; \ + \ + description=MagickGetException(wand,&severity); \ + (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); \ + description=(char *) MagickRelinquishMemory(description); \ + exit(-1); \ +} + + + +// Draw an image at a specific point +int draw_image(cairo_t *c, char *path, double x, double y) { + cairo_surface_t *image; + + // Checks if the file exists. If it doesn't, warn the user that it was not found. + // A file not existing will not terminate the program, but simply not render the image. + FILE *file; + if((file = fopen(path, "r")) != NULL) + { + // file exists + fclose(file); + } + else + { + printf("Warning: image \'%s\' does not exist.\n", path); + return 1; + } + + image = cairo_image_surface_create_from_png(path); + cairo_set_source_surface(c, image, x, y); + cairo_paint(c); + + cairo_surface_destroy (image); + return 0; +} + + + + + + +unsigned long get_image_width(char *path) { + MagickBooleanType status; + MagickWand *wand; + + MagickWandGenesis(); + wand = NewMagickWand(); + status = MagickReadImage(wand, path); + + if (status == MagickFalse) { + ThrowWandException(wand); + } + + unsigned long width = MagickGetImageWidth(wand); + + wand = DestroyMagickWand(wand); + MagickWandTerminus(); + return width; +} + + + +unsigned long get_image_height(char *path) { + MagickBooleanType status; + MagickWand *wand; + + MagickWandGenesis(); + wand = NewMagickWand(); + status = MagickReadImage(wand, path); + + if (status == MagickFalse) { + ThrowWandException(wand); + } + + unsigned long height = MagickGetImageHeight(wand); + + wand = DestroyMagickWand(wand); + MagickWandTerminus(); + return height; +} + + + + + +// Resize an image to a specific width and height. +// Optionally create a new file to preserve the source image. +int resize_image(char *path, double width, double height, bool create_new) { + MagickBooleanType status; + MagickWand *wand; + + MagickWandGenesis(); + wand = NewMagickWand(); + status = MagickReadImage(wand, path); + + if (status == MagickFalse) { + ThrowWandException(wand); + } + + MagickResetIterator(wand); + + MagickResizeImage(wand, width, height, LanczosFilter, 1.0); + + if (create_new == true) { + char new_path[30]; + snprintf(new_path, sizeof(new_path), "%s.tmp", path); + status = MagickWriteImages(wand, new_path, MagickTrue); + } else { + status = MagickWriteImages(wand, path, MagickTrue); + } + + if (status == MagickFalse) { + ThrowWandException(wand); + } + wand = DestroyMagickWand(wand); + MagickWandTerminus(); + return 0; +} + + +// Create a cropped version of an image to a certain dimensions and position. +// Optionally create a new file to preserve the source image. +int crop_image(char *path, double width, double height, double x, double y, bool create_new) { + MagickBooleanType status; + MagickWand *wand; + + MagickWandGenesis(); + wand = NewMagickWand(); + status = MagickReadImage(wand, path); + + if (status == MagickFalse) { + ThrowWandException(wand); + } + + MagickResetIterator(wand); + + MagickCropImage(wand, width, height, x, y); + + if (create_new == true) { + char new_path[30]; + snprintf(new_path, sizeof(new_path), "%s.tmp", path); + status = MagickWriteImages(wand, new_path, MagickTrue); + } else { + status = MagickWriteImages(wand, path, MagickTrue); + } + + if (status == MagickFalse) { + ThrowWandException(wand); + } + wand = DestroyMagickWand(wand); + MagickWandTerminus(); + return 0; +} + + +int prepare_month_art(char *path, struct dimensions *d) { + if (!d->header_width || !d->header_height) { + printf("Error: header_width and header_height unknown.\n"); + return 1; + } + + double desired_ratio = d->header_width / d->header_height; + + unsigned long width = get_image_width(path); + unsigned long height = get_image_height(path); + //double original_ratio = width / height; + + + // Landscape + if (desired_ratio > 1.0) { + } + + // Portrait + if (desired_ratio < 1.0) { + } + + + + printf("%lu x %lu\n", width, height); + + + return 0; + +} + + + + +// Draw month art +int draw_month_art(cairo_t *c, struct dimensions *d, char *path) { + cairo_save(c); + double width = d->header_width; + // TODO: Make this relative to text height + double height = d->header_height - (d->margin * 3.0); + + double cursor_x = d->margin; + double cursor_y = d->margin; + cairo_rectangle (c, d->margin, d->margin, width, height); + cairo_clip(c); + + + draw_image(c, path, cursor_x, cursor_y); + cairo_restore(c); + return 0; +} + + |