+// Returns a smaller image composed of the specified crop area from the larger area.
+// If the specified area is larger than is in the original, returns NULL.
+EG_IMAGE * egCropImage(IN EG_IMAGE *Image, IN UINTN StartX, IN UINTN StartY, IN UINTN Width, IN UINTN Height) {
+ EG_IMAGE *NewImage = NULL;
+ UINTN x, y;
+
+ if (((StartX + Width) > Image->Width) || ((StartY + Height) > Image->Height))
+ return NULL;
+
+ NewImage = egCreateImage(Width, Height, Image->HasAlpha);
+ if (NewImage == NULL)
+ return NULL;
+
+ for (y = 0; y < Height; y++) {
+ for (x = 0; x < Width; x++) {
+ NewImage->PixelData[y * NewImage->Width + x] = Image->PixelData[(y + StartY) * Image->Width + x + StartX];
+ }
+ }
+ return NewImage;
+} // EG_IMAGE * egCropImage()
+