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#version 100
//_DEFINES_
#if defined(EXTERNAL)
#extension GL_OES_EGL_image_external : require
#endif
precision highp float;
#if defined(EXTERNAL)
uniform samplerExternalOES tex;
#else
uniform sampler2D tex;
#endif
uniform float alpha;
varying vec2 v_coords;
#if defined(DEBUG_FLAGS)
uniform float tint;
#endif
uniform float niri_scale;
uniform vec2 geo_size;
uniform vec4 corner_radius;
uniform mat3 input_to_geo;
float rounding_alpha(vec2 coords, vec2 size) {
vec2 center;
float radius;
if (coords.x < corner_radius.x && coords.y < corner_radius.x) {
radius = corner_radius.x;
center = vec2(radius, radius);
} else if (size.x - corner_radius.y < coords.x && coords.y < corner_radius.y) {
radius = corner_radius.y;
center = vec2(size.x - radius, radius);
} else if (size.x - corner_radius.z < coords.x && size.y - corner_radius.z < coords.y) {
radius = corner_radius.z;
center = vec2(size.x - radius, size.y - radius);
} else if (coords.x < corner_radius.w && size.y - corner_radius.w < coords.y) {
radius = corner_radius.w;
center = vec2(radius, size.y - radius);
} else {
return 1.0;
}
float dist = distance(coords, center);
float half_px = 0.5 / niri_scale;
return 1.0 - smoothstep(radius - half_px, radius + half_px, dist);
}
void main() {
vec3 coords_geo = input_to_geo * vec3(v_coords, 1.0);
// Sample the texture.
vec4 color = texture2D(tex, v_coords);
#if defined(NO_ALPHA)
color = vec4(color.rgb, 1.0);
#endif
if (coords_geo.x < 0.0 || 1.0 < coords_geo.x || coords_geo.y < 0.0 || 1.0 < coords_geo.y) {
// Clip outside geometry.
color = vec4(0.0);
} else {
// Apply corner rounding inside geometry.
color = color * rounding_alpha(coords_geo.xy * geo_size, geo_size);
}
// Apply final alpha and tint.
color = color * alpha;
#if defined(DEBUG_FLAGS)
if (tint == 1.0)
color = vec4(0.0, 0.2, 0.0, 0.2) + color * 0.8;
#endif
gl_FragColor = color;
}
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