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The GLES 2 wrapper needs to set up some state before each draw. Previously this was acheived by wrapping glDrawArrays. Since the multiple-texture-rectangle branch merge, glDrawElements is used instead so we also need a wrapper for that. It was also directly calling glBindTexture. GLES 2 uses a wrapper for this function so that it can cope with GL_ALPHA format textures. The format of the current texture needs to be stored as well as the target and object number for this to work.