conrod_vulkano 0.76.1

An easy-to-use, 100% Rust, extensible 2D GUI library.
Documentation 
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// NOTE: This shader requires being manually compiled to SPIR-V in order to
// avoid having downstream users require building shaderc and compiling the
// shader themselves. If you update this shader, be sure to also re-compile it
// and update `frag.spv`. You can do so using `glslangValidator` with the
// following command: `glslangValidator -V -o frag.spv shader.frag`

#version 450
layout(set = 0, binding = 0) uniform sampler2D t_Color;
layout(location = 0) in vec2 v_Uv;
layout(location = 1) in vec4 v_Color;
layout(location = 2) flat in uint v_Mode;
layout(location = 0) out vec4 Target0;
void main() {
    // Text
    if (v_Mode == uint(0)) {
        Target0 = v_Color * vec4(1.0, 1.0, 1.0, texture(t_Color, v_Uv).r);
        // Image
    } else if (v_Mode == uint(1)) {
        Target0 = texture(t_Color, v_Uv);
        // 2D Geometry
    } else if (v_Mode == uint(2)) {
        Target0 = v_Color;
    }
}