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* Use GLSL shaders for sprites.David Thompson2014-02-162-0/+34
* 2d/sprite.scm: (sprite-vertex): Remove color vertex. (r-offset): Delete it. (pack-sprite-vertices): Remove logic moved to shader. (draw-sprite-vertices): Remove color vertex array rendering. (sprite-shader): New variable. (<sprite>): Remove dirty field and adjust setters. (make-anchor): New procedure. (update-sprite-vertices!): Use new 'pack-sprite-vertices'. (make-sprite): Use 'make-anchor' and 'update-sprite-vertices!'. (dirty-sprite-setter): Delete it. (load-sprite): Formatting. (sprite-animation-texture): Delete it. (drawable-texture): New procedure. (sprite-texture): Extract body to 'drawable-texture'. (sprite-anchor-vector): Delete it. (set-sprite-anchor!): Reimplemented. (update-sprite-animator!): Update vertices. (draw-sprite): Use shader program. (<sprite-batch>, make-sprite-batch, sprite-batch?, sprite-batch-max-size, sprite-batch-size, set-sprite-batch-size!, sprite-batch-texture, set-sprite-batch-texture!, sprite-batch-vertices, sprite-batch-draw, with-sprite-batch): Delete all sprite batch code. * data/Makefile.am (shadersdir, shaders_DATA): New variables. * data/shaders/sprite-fragment.glsl: New shader. * data/shaders/sprite-vertex.glsl: New shader.