i can't find it
info.h, and info.w are for the current height width
how about the original sprites height, and width
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Based on a quick walk through the sprite object source code, it looks like these return what you want:
CRunObject->info.curTexture->image_width
CRunObject->info.curTexture->image_height
curTexture is allowed to be NULL, so make sure you check that first.