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[Helper] Add basic error checking to svg loading code.

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Dave Davenport 2017-06-26 20:16:20 +02:00
parent 3556f65198
commit cf7d0866d5
1 changed files with 36 additions and 16 deletions
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32
source/helper.c
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@ -1075,24 +1075,44 @@ char *helper_get_theme_path ( const char *file )
cairo_surface_t* cairo_image_surface_create_from_svg ( const gchar* file, int height ) cairo_surface_t* cairo_image_surface_create_from_svg ( const gchar* file, int height )
{ {
cairo_surface_t *surface; GError *error = NULL;
cairo_t *cr; cairo_surface_t *surface = NULL;
RsvgHandle * handle; RsvgHandle * handle;
RsvgDimensionData dimensions;
handle = rsvg_handle_new_from_file ( file, NULL ); handle = rsvg_handle_new_from_file ( file, &error );
if ( handle != NULL ) {
cairo_t *cr;
RsvgDimensionData dimensions;
// Update DPI.
rsvg_handle_set_dpi ( handle, config.dpi );
// Get size.
rsvg_handle_get_dimensions ( handle, &dimensions ); rsvg_handle_get_dimensions ( handle, &dimensions );
// Create cairo surface in the right size.
double scale = (double) height / dimensions.height; double scale = (double) height / dimensions.height;
surface = cairo_image_surface_create ( CAIRO_FORMAT_ARGB32, surface = cairo_image_surface_create ( CAIRO_FORMAT_ARGB32,
(double) dimensions.width * scale, (double) dimensions.width * scale,
(double) dimensions.height * scale ); (double) dimensions.height * scale );
gboolean failed = cairo_surface_status ( surface ) != CAIRO_STATUS_SUCCESS;
if ( !failed ) {
cr = cairo_create ( surface ); cr = cairo_create ( surface );
cairo_scale ( cr, scale, scale ); cairo_scale ( cr, scale, scale );
rsvg_handle_render_cairo ( handle, cr ); failed = rsvg_handle_render_cairo ( handle, cr );
cairo_destroy ( cr ); cairo_destroy ( cr );
}
rsvg_handle_close ( handle, NULL ); rsvg_handle_close ( handle, &error );
g_object_unref ( handle ); g_object_unref ( handle );
/** Rendering fails */
if ( failed ) {
cairo_surface_destroy ( surface );
surface = NULL;
}
}
if ( error != NULL ) {
g_warning ( "Failed to render SVG file: '%s': %s", file, error->message );
g_error_free ( error );
}
return surface; return surface;
} }