diff options
Diffstat (limited to 'libdocument/ev-document-misc.c')
| -rw-r--r-- | libdocument/ev-document-misc.c | 79 |
1 files changed, 75 insertions, 4 deletions
diff --git a/libdocument/ev-document-misc.c b/libdocument/ev-document-misc.c index e8739a1..3dc4bab 100644 --- a/libdocument/ev-document-misc.c +++ b/libdocument/ev-document-misc.c @@ -163,6 +163,73 @@ ev_document_misc_surface_from_pixbuf (GdkPixbuf *pixbuf) return surface; } +GdkPixbuf * +ev_document_misc_pixbuf_from_surface (cairo_surface_t *surface) +{ + GdkPixbuf *pixbuf; + cairo_surface_t *image; + cairo_t *cr; + gboolean has_alpha; + gint width, height; + cairo_format_t surface_format; + gint pixbuf_n_channels; + gint pixbuf_rowstride; + guchar *pixbuf_pixels; + gint x, y; + + width = cairo_image_surface_get_width (surface); + height = cairo_image_surface_get_height (surface); + + surface_format = cairo_image_surface_get_format (surface); + has_alpha = (surface_format == CAIRO_FORMAT_ARGB32); + + pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, + TRUE, 8, + width, height); + pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf); + pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf); + pixbuf_pixels = gdk_pixbuf_get_pixels (pixbuf); + + image = cairo_image_surface_create_for_data (pixbuf_pixels, + surface_format, + width, height, + pixbuf_rowstride); + cr = cairo_create (image); + cairo_set_source_surface (cr, surface, 0, 0); + + if (has_alpha) + cairo_mask_surface (cr, surface, 0, 0); + else + cairo_paint (cr); + + cairo_destroy (cr); + cairo_surface_destroy (image); + + for (y = 0; y < height; y++) { + guchar *p = pixbuf_pixels + y * pixbuf_rowstride; + + for (x = 0; x < width; x++) { + guchar tmp; + +#if G_BYTE_ORDER == G_LITTLE_ENDIAN + tmp = p[0]; + p[0] = p[2]; + p[2] = tmp; + p[3] = (has_alpha) ? p[3] : 0xff; +#else + tmp = p[0]; + p[0] = (has_alpha) ? p[3] : 0xff; + p[3] = p[2]; + p[2] = p[1]; + p[1] = tmp; +#endif + p += pixbuf_n_channels; + } + } + + return pixbuf; +} + cairo_surface_t * ev_document_misc_surface_rotate_and_scale (cairo_surface_t *surface, gint dest_width, @@ -207,10 +274,14 @@ ev_document_misc_surface_rotate_and_scale (cairo_surface_t *surface, default: cairo_translate (cr, 0, 0); } - cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_BILINEAR); - cairo_scale (cr, - (gdouble)dest_width / width, - (gdouble)dest_height / height); + + if (dest_width != width || dest_height != height) { + cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_BILINEAR); + cairo_scale (cr, + (gdouble)dest_width / width, + (gdouble)dest_height / height); + } + cairo_rotate (cr, dest_rotation * G_PI / 180.0); cairo_set_source_surface (cr, surface, 0, 0); cairo_paint (cr); |