render: Change texture origin to top-left.

This is a pretty big change, but hopefully for the best as this aligns
with graphics programs and the glTF standard that uses a top-left
origin.  We can keep using a lower-left origin for vertices, though.

* chickadee/render/texture.scm (surface->texture): Stop flipping pixel
rows.
* chickadee/render/sprites.scm (draw-sprite-unbatched,
sprite-batch-add!, draw-nine-patch*): Adjust texture y-coordinates.
* chickadee/render/font.scm (parse-fnt): Stop inverting y coordinates.
* chickadee/render/tiled.scm (load-tile-map): Stop inverting tile ids.

0 files changed, 0 insertions, 0 deletions