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#include "backend_librsvg.h"
#include "backend.h"
#include "source.h"
#include <stdlib.h>
#ifdef IMV_BACKEND_LIBRSVG
#include <librsvg/rsvg.h>
/* Some systems like GNU/Hurd don't define PATH_MAX */
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
static void source_free(struct imv_source *src)
{
free(src->name);
src->name = NULL;
free(src);
}
static struct imv_bitmap *to_imv_bitmap(GdkPixbuf *bitmap)
{
struct imv_bitmap *bmp = malloc(sizeof(struct imv_bitmap));
bmp->width = gdk_pixbuf_get_width(bitmap);
bmp->height = gdk_pixbuf_get_height(bitmap);
bmp->format = IMV_ARGB;
size_t len = bmp->width * bmp->height * 4;
bmp->data = malloc(len);
memcpy(bmp->data, gdk_pixbuf_get_pixels(bitmap), len);
return bmp;
}
static void report_error(struct imv_source *src)
{
if (!src->callback) {
fprintf(stderr, "imv_source(%s) has no callback configured. "
"Discarding error.\n", src->name);
return;
}
struct imv_source_message msg;
msg.source = src;
msg.user_data = src->user_data;
msg.bitmap = NULL;
msg.error = "Internal error";
src->callback(&msg);
}
static void send_bitmap(struct imv_source *src, GdkPixbuf *bitmap)
{
if (!src->callback) {
fprintf(stderr, "imv_source(%s) has no callback configured. "
"Discarding result.\n", src->name);
return;
}
struct imv_source_message msg;
msg.source = src;
msg.user_data = src->user_data;
msg.bitmap = to_imv_bitmap(bitmap);
msg.frametime = 0;
msg.error = NULL;
src->callback(&msg);
}
static void load_image(struct imv_source *src)
{
GError *error = NULL;
char path[PATH_MAX+8];
snprintf(path, sizeof path, "file://%s", src->name);
RsvgHandle *handle = rsvg_handle_new_from_file(path, &error);
if (!handle) {
report_error(src);
return;
}
RsvgDimensionData dim;
rsvg_handle_get_dimensions(handle, &dim);
src->width = dim.width;
src->height = dim.height;
GdkPixbuf *buf = rsvg_handle_get_pixbuf(handle);
if (!buf) {
rsvg_handle_close(handle, &error);
report_error(src);
return;
}
rsvg_handle_close(handle, &error);
send_bitmap(src, buf);
}
static enum backend_result open_path(const char *path, struct imv_source **src)
{
/* Look for an <SVG> tag near the start of the file */
char header[128];
FILE *f = fopen(path, "rb");
if (!f) {
return BACKEND_BAD_PATH;
}
fread(header, 1, sizeof header, f);
fclose(f);
header[(sizeof header) - 1] = 0;
if (!strstr(header, "<SVG") && !strstr(header, "<svg")) {
return BACKEND_UNSUPPORTED;
}
struct imv_source *source = calloc(1, sizeof(struct imv_source));
source->name = strdup(path);
source->width = 1024;
source->height = 1024;
source->num_frames = 1;
source->next_frame = 1;
source->load_first_frame = &load_image;
source->load_next_frame = NULL;
source->free = &source_free;
source->callback = NULL;
source->user_data = NULL;
source->private = NULL;
*src = source;
return BACKEND_SUCCESS;
}
const struct imv_backend librsvg_backend = {
.name = "libRSVG",
.description = "SVG library developed by GNOME",
.website = "https://wiki.gnome.org/Projects/LibRsvg",
.license = "Lesser GNU Public License",
.open_path = &open_path,
};
const struct imv_backend *imv_backend_librsvg(void)
{
return &librsvg_backend;
}
#else
const struct imv_backend *imv_backend_librsvg(void)
{
return NULL;
}
#endif
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