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Merge pull request #208 from metallic77/glsl

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fix for GL_ES 2.0
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hizzlekizzle 2023-05-17 14:26:33 -05:00 committed by GitHub
commit 474a042526
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1 changed files with 12 additions and 10 deletions
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22
crt/shaders/crt-1tap.glsl
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@ -137,22 +137,24 @@ uniform COMPAT_PRECISION float THICK_FALLOFF;
void main() {
float src_x_int;
const float src_x_fract = modf(vTexCoord.x * SourceSize.x - 0.5, src_x_int);
vec2 cent = vTexCoord*SourceSize.xy;
float src_x_fract = fract(cent.x - 0.5);
float src_x_int = floor(cent.x-0.5);
float src_y_int;
const float src_y_fract = modf(vTexCoord.y * SourceSize.y - SUBPX_POS, src_y_int) - 0.5;
float src_y_fract = fract(cent.y - SUBPX_POS) -0.5;
float src_y_int = floor (cent.y - SUBPX_POS);
// Function similar to smoothstep and sigmoid.
const float s = sign(src_x_fract - 0.5);
const float o = (1.0 + s) * 0.5;
const float src_x = src_x_int + o - 0.5 * s * pow(2.0 * (o - s * src_x_fract), mix(1.0, 6.0, H_SHARP));
float s = sign(src_x_fract - 0.5);
float o = (1.0 + s) * 0.5;
float src_x = src_x_int + o - 0.5 * s * pow(2.0 * (o - s * src_x_fract), mix(1.0, 6.0, H_SHARP));
const vec3 signal = COMPAT_TEXTURE(Source, vec2((src_x + 0.5) * SourceSize.z, (src_y_int + 0.5) * SourceSize.w)).rgb;
vec3 signal = COMPAT_TEXTURE(Source, vec2((src_x + 0.5) * SourceSize.z, (src_y_int + 0.5) * SourceSize.w)).rgb;
// Vectorize operations for speed.
const float eff_v_sharp = 3.0 + 50.0 * V_SHARP * V_SHARP;
const vec3 radius = pow(mix(MIN_THICK.xxx, MAX_THICK.xxx, signal), THICK_FALLOFF.xxx) * 0.5;
float eff_v_sharp = 3.0 + 50.0 * V_SHARP * V_SHARP;
vec3 thickmin = vec3(MIN_THICK); vec3 thickmax = vec3(MAX_THICK); vec3 thickfall = vec3(THICK_FALLOFF);
vec3 radius = pow(mix(thickmin, thickmax, signal), thickfall) * 0.5;
FragColor.rgb = signal * clamp(0.25 - eff_v_sharp * (src_y_fract * src_y_fract - radius * radius),0.0, 1.0);
}