36 lines
1.3 KiB
GLSL
36 lines
1.3 KiB
GLSL
#version 450
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#extension GL_EXT_nonuniform_qualifier : require
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#extension GL_EXT_debug_printf : require
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#extension GL_GOOGLE_include_directive : require
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#include "rect.inc"
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layout (location = 0) in flat uint texture_index;
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layout (location = 1) in RectFragmentShaderInput inputs;
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layout (location = 0) out vec4 color;
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layout(set = 0, binding = 0) uniform sampler2D textures[];
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float rounded_rect_sdf(vec2 position, vec2 center, vec2 half_size, float radius)
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{
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vec2 d2 = abs(center - position) - half_size + vec2(radius, radius);
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float result = min(max(d2.x, d2.y), 0.0) + length(max(d2, 0.0)) - radius;
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return result;
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}
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void main()
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{
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uint sampler_index = nonuniformEXT(texture_index);
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vec2 texture_size = textureSize(textures[sampler_index], 0);
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vec2 uv = vec2(inputs.uv.x / texture_size.x, inputs.uv.y / texture_size.y);
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vec4 sampled = texture(textures[sampler_index], uv);
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float softness = inputs.softness;
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float softness_padding_scalar = max(0, softness * 2 - 1);
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vec2 softness_padding = vec2(softness_padding_scalar, softness_padding_scalar);
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float distance = rounded_rect_sdf(inputs.position, inputs.center, inputs.half_size - softness_padding, inputs.corner_radius);
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float sdf_factor = 1.0 - smoothstep(0, 2 * softness, distance);
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color = inputs.color * sampled * sdf_factor;
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}
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