Draw image and rectangular image with opacity control
superlou opened this issue · comments
For drawing most primitives, the opacity/alpha is controlled through an RGBA color. Is it possible to add opacity control to the draw_image and draw_rectangle_image... functions? Is that already supposed to be achieved using draw_rectangle_image_tinted and RGBA color of (1, 1, 1, opacity) instead? If that's the case, then new functions aren't needed. I wasn't sure if there's a speed impact of tinting vs. a simpler opacity control.
Is that already supposed to be achieved using draw_rectangle_image_tinted and RGBA color of (1, 1, 1, opacity) instead?
Yes this is correct. I think draw_rectangle_image_tinted should be the fastest way to do this -- the shader multiplies each pixel of the image by the tint colour, which includes the alpha value. The original draw_rectangle_image actually just calls draw_rectangle_image_tinted with a tint of Color::WHITE :)
That works great, thanks!