59 lines
1.5 KiB
Plaintext
59 lines
1.5 KiB
Plaintext
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uniform sampler2D samp8; // textures
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uniform sampler2D samp9;
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const int char_width = 8;
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const int char_height = 13;
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const int char_count = 95;
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const vec2 char_dim = vec2(char_width, char_height);
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const vec2 font_scale = vec2(1.0/char_width/char_count, 1.0/char_height);
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out vec4 ocol0;
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in vec2 uv0;
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uniform vec4 resolution;
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void main()
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{
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vec2 char_pos = floor(uv0*resolution.xy/char_dim);
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vec2 pixel_offset = floor(uv0*resolution.xy) - char_pos*char_dim;
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float minc = 0;
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float mindiff = char_width*char_height*100;
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float diffsum[char_count];
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vec4 color_avg = vec4(0.0, 0.0, 0.0, 0.0);
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for(int i=0; i<char_count; i++) {
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diffsum[i] = 0.0;
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}
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for(int x=0; x<char_width; x++) {
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for(int y=0; y<char_height; y++) {
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vec2 tex_pos = char_pos*char_dim + vec2(x,y) + 0.5;
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vec4 tex = texture(samp9, tex_pos * resolution.zw);
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float tex_f = (tex.x + tex.y + tex.z)/3;
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color_avg += tex;
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for(int i=0; i<char_count; i++) {
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vec2 font_pos = vec2(x+i*char_width, y) + 0.5;
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vec4 font = texture(samp8, font_pos * font_scale);
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float font_f = font.x;
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float diff = (font_f-tex_f)*(font_f-tex_f);
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diffsum[i] = diffsum[i] + diff;
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}
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}
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}
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for(int i=0; i<char_count; i++) {
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if(diffsum[i] < mindiff) {
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mindiff = diffsum[i];
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minc = i;
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}
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}
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color_avg /= char_width*char_height;
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vec2 font_pos_res = vec2(minc*char_width, 0) + pixel_offset + 0.5;
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ocol0 = color_avg * texture(samp8, font_pos_res * font_scale);
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}
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