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Nunuhara Cabbage
05b78e6dc6
Use ceil(threshold) as cutoff distance in dilate shader, and tone down the strength of the fractional part of the threshold. Take bold width into account during layout. This fixes the text rendering of name plates in Rance Quest.
51 lines
1.5 KiB
GLSL
51 lines
1.5 KiB
GLSL
/* Copyright (C) 2019 Nunuhara Cabbage <nunuhara@haniwa.technology>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://gnu.org/licenses/>.
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*/
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uniform sampler2D tex;
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uniform float threshold;
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uniform vec4 color; // .a is the discard threshold
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in vec2 tex_coord;
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out vec4 frag_color;
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void main() {
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// the fractional part of threshold becomes a weight value for the
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// edge pixels
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int size = int(floor(threshold));
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int cutoff = size + 1;
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float edge_weight = fract(threshold) / 4.0;
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vec2 tex_size = vec2(textureSize(tex, 0).xy);
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float t = ceil(threshold);
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float a_out = 0.0;
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for (int x = -cutoff; x <= cutoff; x++) {
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for (int y = -cutoff; y <= cutoff; y++) {
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float d = distance(vec2(x, y), vec2(0, 0));
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if (d > t)
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continue;
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float a = texture(tex, tex_coord + vec2(x, y) / tex_size).r;
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if (d > float(size))
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a *= edge_weight;
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a_out += a;
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}
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}
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if (a_out < color.a)
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discard;
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frag_color = vec4(color.rgb, min(a_out, 1.0));
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}
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