81 lines
3.1 KiB
Plaintext
81 lines
3.1 KiB
Plaintext
// Taken from the godot-demo-projects repo.
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// GODOT ENGINE
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// http://www.godotengine.org
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//
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// ************************************************************************
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//
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// Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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//************************************************************************
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uniform highp float outline_width; // = 2.0;
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uniform highp vec4 outline_color; // =vec4(1.0,0.0,0.0,0.33);
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uniform bool outline_fullbright; // =false;
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uniform highp float light_boost; // = 4.0;
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uniform highp float light_gamma; // = 1.0;
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uniform highp float light_whitepoint; // = 1.0;
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void fragment() {
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highp vec4 col = zTexture(UV);
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highp vec2 ps = TEXTURE_PIXEL_SIZE;
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highp float a;
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highp float maxa = col.a;
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highp float mina = col.a;
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// note: these bypass zTexture because only alpha is queried.
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a = texture2D(TEXTURE, UV + vec2(0.0, -outline_width)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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a = texture2D(TEXTURE, UV + vec2(-outline_width, -outline_width)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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a = texture2D(TEXTURE, UV + vec2(0.0, outline_width)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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a = texture2D(TEXTURE, UV + vec2(outline_width, -outline_width)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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a = texture2D(TEXTURE, UV + vec2(-outline_width,0.0)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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a = texture2D(TEXTURE, UV + vec2(-outline_width, outline_width)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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a = texture2D(TEXTURE, UV + vec2(outline_width, 0.0)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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a = texture2D(TEXTURE, UV + vec2(outline_width, outline_width)*ps).a;
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maxa = max(a, maxa);
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mina = min(a, mina);
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lowp float sampledLight = outline_fullbright ? 1.0 : clamp( (pow( zGrayscale_BT601(lightSample.rgb) * light_whitepoint, light_gamma) / light_whitepoint ) * light_boost, 0.0, 1.0);
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COLOR = mix(col, outline_color * vec4(vec3(1.0), sampledLight), maxa - col.a);
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lightSample = vec3(1.0);
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}
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