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/*
* imagestore.c
*
* Copyright © 2013 Thomas White <taw@bitwiz.org.uk>
*
* This file is part of Colloquium.
*
* Colloquium is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "imagestore.h"
struct image_record
{
char *filename;
GdkPixbuf *pixbuf[NUM_ISZ_SIZES];
int w[NUM_ISZ_SIZES];
};
struct _imagestore
{
int n_images;
struct image_record *images;
int max_images;
};
static int alloc_images(ImageStore *is, int new_max_images)
{
struct image_record *images_new;
images_new = realloc(is->images,
sizeof(struct image_record)*new_max_images);
if ( images_new == NULL ) return 1;
is->images = images_new;
is->max_images = new_max_images;
return 0;
}
ImageStore *imagestore_new()
{
ImageStore *is;
is = calloc(1, sizeof(ImageStore));
if ( is == NULL ) return NULL;
is->images = NULL;
is->n_images = 0;
is->max_images = 0;
if ( alloc_images(is, 32) ) {
free(is);
return NULL;
}
return is;
}
void imagestore_destroy(ImageStore *is)
{
int i;
for ( i=0; i<is->n_images; i++ ) {
int j;
free(is->images[i].filename);
for ( j=0; j<NUM_ISZ_SIZES; j++ ) {
if ( is->images[i].pixbuf[j] != NULL ) {
g_object_unref(is->images[i].pixbuf[j]);
}
}
}
free(is->images);
free(is);
}
static GdkPixbuf *add_pixbuf(struct image_record *im, const char *filename,
int w, enum is_size isz)
{
GError *error = NULL;
printf("Loading '%s' at width %i\n", filename, w);
im->pixbuf[isz] = gdk_pixbuf_new_from_file_at_size(filename, w, -1,
&error);
if ( im->pixbuf[isz] == NULL ) {
fprintf(stderr, "Failed to load image '%s'\n", filename);
return NULL;
}
im->w[isz] = w;
return im->pixbuf[isz];
}
static GdkPixbuf *add_new_image(ImageStore *is, const char *filename, int w,
enum is_size isz)
{
int j;
int idx;
if ( is->n_images == is->max_images ) {
if ( alloc_images(is, is->max_images+32) ) {
fprintf(stderr, "Couldn't allocate memory.\n");
return NULL;
}
}
idx = is->n_images++;
is->images[idx].filename = strdup(filename);
for ( j=0; j<NUM_ISZ_SIZES; j++ ) {
is->images[idx].pixbuf[j] = NULL;
is->images[idx].w[j] = 0;
}
return add_pixbuf(&is->images[idx], filename, w, isz);
}
void show_imagestore(ImageStore *is)
{
int i;
printf("Store %p contains %i records.\n", is, is->n_images);
for ( i=0; i<is->n_images; i++ ) {
printf("%s :\n", is->images[i].filename);
printf("ss: %p %i ", is->images[i].pixbuf[ISZ_SLIDESHOW],
is->images[i].w[ISZ_SLIDESHOW]);
printf("ed: %p %i ", is->images[i].pixbuf[ISZ_EDITOR],
is->images[i].w[ISZ_EDITOR]);
printf("th: %p %i ", is->images[i].pixbuf[ISZ_THUMBNAIL],
is->images[i].w[ISZ_THUMBNAIL]);
printf("\n");
}
}
GdkPixbuf *lookup_image(ImageStore *is, const char *filename, int w,
enum is_size isz)
{
int i;
int found = 0;
GdkPixbuf *pb;
for ( i=0; i<is->n_images; i++ ) {
if ( strcmp(is->images[i].filename, filename) == 0 ) {
found = 1;
break;
}
}
if ( !found ) {
return add_new_image(is, filename, w, isz);
}
/* Image already exists, but might not have the right size or
* the right slot filled in */
if ( is->images[i].w[isz] == w ) return is->images[i].pixbuf[isz];
/* Image is the wrong size or slot is not filled in yet */
if ( is->images[i].pixbuf[isz] != NULL ) {
g_object_unref(is->images[i].pixbuf[isz]);
is->images[i].pixbuf[isz] = NULL;
}
/* Slot is not filled in yet */
pb = add_pixbuf(&is->images[i], filename, w, isz);
return pb;
}
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