- RrPixel32 *draw = rgba->data;
- gint c, i, e, t, sfw, sfh;
- sfw = area->width;
- sfh = area->height;
-
- g_assert(rgba->data != NULL);
-
- if ((rgba->width != sfw || rgba->height != sfh) &&
- (rgba->width != rgba->cwidth || rgba->height != rgba->cheight)) {
- double dx = rgba->width / (double)sfw;
- double dy = rgba->height / (double)sfh;
- double px = 0.0;
- double py = 0.0;
- int iy = 0;
-
- /* scale it and cache it */
- if (rgba->cache != NULL)
+ gulong dstX, dstY, srcX, srcY;
+ gulong srcX1, srcX2, srcY1, srcY2;
+ gulong ratioX, ratioY;
+
+ ratioX = (srcW << FRACTION) / dstW;
+ ratioY = (srcH << FRACTION) / dstH;
+
+ srcY2 = 0;
+ for (dstY = 0; dstY < dstH; dstY++) {
+ srcY1 = srcY2;
+ srcY2 += ratioY;
+
+ srcX2 = 0;
+ for (dstX = 0; dstX < dstW; dstX++) {
+ gulong red = 0, green = 0, blue = 0, alpha = 0;
+ gulong portionX, portionY, portionXY, sumXY = 0;
+ RrPixel32 pixel;
+
+ srcX1 = srcX2;
+ srcX2 += ratioX;
+
+ for (srcY = srcY1; srcY < srcY2; srcY += (1UL << FRACTION)) {
+ if (srcY == srcY1) {
+ srcY = FLOOR(srcY);
+ portionY = (1UL << FRACTION) - (srcY1 - srcY);
+ if (portionY > srcY2 - srcY1)
+ portionY = srcY2 - srcY1;
+ }
+ else if (srcY == FLOOR(srcY2))
+ portionY = srcY2 - srcY;
+ else
+ portionY = (1UL << FRACTION);
+
+ for (srcX = srcX1; srcX < srcX2; srcX += (1UL << FRACTION)) {
+ if (srcX == srcX1) {
+ srcX = FLOOR(srcX);
+ portionX = (1UL << FRACTION) - (srcX1 - srcX);
+ if (portionX > srcX2 - srcX1)
+ portionX = srcX2 - srcX1;
+ }
+ else if (srcX == FLOOR(srcX2))
+ portionX = srcX2 - srcX;
+ else
+ portionX = (1UL << FRACTION);
+
+ portionXY = (portionX * portionY) >> FRACTION;
+ sumXY += portionXY;
+
+ pixel = *(src + (srcY >> FRACTION) * srcW
+ + (srcX >> FRACTION));
+ red += ((pixel >> RrDefaultRedOffset) & 0xFF)
+ * portionXY;
+ green += ((pixel >> RrDefaultGreenOffset) & 0xFF)
+ * portionXY;
+ blue += ((pixel >> RrDefaultBlueOffset) & 0xFF)
+ * portionXY;
+ alpha += ((pixel >> RrDefaultAlphaOffset) & 0xFF)
+ * portionXY;
+ }
+ }
+
+ g_assert(sumXY != 0);
+ red /= sumXY;
+ green /= sumXY;
+ blue /= sumXY;
+ alpha /= sumXY;
+
+ *dst++ = (red << RrDefaultRedOffset) |
+ (green << RrDefaultGreenOffset) |
+ (blue << RrDefaultBlueOffset) |
+ (alpha << RrDefaultAlphaOffset);
+ }
+ }
+}
+
+void RrImageDraw(RrPixel32 *target, RrTextureRGBA *rgba,
+ gint target_w, gint target_h,
+ RrRect *area)
+{
+ RrPixel32 *dest;
+ RrPixel32 *source;
+ gint sw, sh, dw, dh;
+ gint col, num_pixels;
+
+ sw = rgba->width;
+ sh = rgba->height;
+
+ /* keep the ratio */
+ dw = area->width;
+ dh = (gint)(dw * ((gdouble)sh / sw));
+ if (dh > area->height) {
+ dh = area->height;
+ dw = (gint)(dh * ((gdouble)sw / sh));
+ }
+
+ if (!(dw && dh))
+ return; /* XXX sanity check */
+
+ if (sw != dw || sh != dh) {
+ /*if (!(rgba->cache && dw == rgba->cwidth && dh == rgba->cheight))*/ {