+ s = sourceline;
+ s2 = sourceline2;
+
+ for (x = 0; x < dw; ++x) {
+ *dest++ = AVERAGE(AVERAGE(*s, *(s+1)),
+ AVERAGE(*s2, *(s2+1)));
+ s += 2;
+ s2 += 2;
+ }
+ sourceline += w << 1;
+ sourceline2 += w << 1;
+ }
+ return out;
+}
+
+static RrPixel32* scale_rect(RrPixel32 *fullsource,
+ gint w, gint h, gint dw, gint dh)
+{
+ RrPixel32 *out, *dest;
+ RrPixel32 *source = fullsource;
+ RrPixel32 *oldsource = NULL;
+ RrPixel32 *prev_source = NULL;
+ gint num_pixels;
+ gint int_part;
+ gint fract_part;
+ gint err = 0;
+
+ while (dw <= (w >> 1) && dh <= (h >> 1)) {
+ source = scale_half(source, w, h);
+ w >>= 1; h >>= 1;
+ g_free(oldsource);
+ oldsource = source;
+ }
+
+ num_pixels = dh;
+ int_part = (h / dh) * w;
+ fract_part = h % dh;
+
+ out = dest = g_new(RrPixel32, dw * dh);
+
+ while (num_pixels-- > 0) {
+ if (source == prev_source) {
+ memcpy(dest, dest - dw, dw * sizeof(RrPixel32));
+ } else {
+ scale_line(dest, source, w, dw);
+ prev_source = source;
+ }
+ dest += dw;
+ source += int_part;
+ err += fract_part;
+ if (err >= dh) {
+ err -= dh;
+ source += w;
+ }
+ }
+
+ g_free(oldsource);
+
+ return out;
+}
+
+void RrImageDraw(RrPixel32 *target, RrTextureRGBA *rgba,
+ gint target_w, gint target_h,
+ RrRect *area)