#version 330

// pathfinder/shaders/tile.vs.glsl
//
// Copyright © 2020 The Pathfinder Project Developers.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

precision highp float;
precision highp sampler2D;

uniform mat4 uTransform;
uniform vec2 uTileSize;

in ivec2 aTilePosition;
in vec2 aColorTexCoord0;
in vec2 aColorTexCoord1;
in vec2 aMaskTexCoord0;
in vec2 aMaskTexCoord1;
in ivec2 aMaskBackdrop;

out vec3 vMaskTexCoord0;
out vec3 vMaskTexCoord1;
out vec2 vColorTexCoord0;
out vec2 vColorTexCoord1;

void main() {
    vec2 position = vec2(aTilePosition) * uTileSize;
    vColorTexCoord0 = aColorTexCoord0;
    vColorTexCoord1 = aColorTexCoord1;
    vMaskTexCoord0 = vec3(aMaskTexCoord0, float(aMaskBackdrop.x));
    vMaskTexCoord1 = vec3(aMaskTexCoord1, float(aMaskBackdrop.y));
    gl_Position = uTransform * vec4(position, 0.0, 1.0);
}