crow 0.7.2

A pixel perfect 2D rendering engine
Documentation 
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#version 330

in vec2 tex_coords;
out vec4 color;

uniform mat4 color_modulation;
uniform bool invert_color;

uniform sampler2D source;

void main() {
    color = color_modulation * texture(source, tex_coords);
    if (color.a == 0.0) {
        discard;
    }

    if (invert_color) {
        color.rgb = 1.0 - color.rgb;
    }
}