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Improve bloom effect (#12916)

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* Remove the built-in exposure factor of 2.5
* Add physics-based bloom (https://learnopengl.com/Guest-Articles/2022/Phys.-Based-Bloom)
* Add luminance scaling for bloom layer to simulate HDR
* Add setting to control bloom strength
This commit is contained in:
x2048 2022-11-02 09:09:48 +01:00 • committed by GitHub
parent fb3085a2c5
commit 9b24041394
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GPG key ID: 4AEE18F83AFDEB23
15 changed files with 195 additions and 59 deletions
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12
client/shaders/blur_v/opengl_fragment.glsl
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@ -3,6 +3,7 @@
uniform sampler2D rendered;
uniform vec2 texelSize0;
uniform mediump float bloomRadius;
uniform mat3 bloomBlurWeights;
#ifdef GL_ES
varying mediump vec2 varTexCoord;
@ -10,6 +11,13 @@ varying mediump vec2 varTexCoord;
centroid varying vec2 varTexCoord;
#endif
// smoothstep - squared
float smstsq(float f)
{
f = f * f * (3 - 2 * f);
return f;
}
void main(void)
{
// kernel distance and linear size
@ -19,8 +27,8 @@ void main(void)
vec4 color = vec4(0.);
mediump float sum = 0.;
for (mediump float i = 0.; i < n; i++) {
mediump float weight = pow(1. - (abs(i / bloomRadius - 1.)), 1.3);
color += texture2D(rendered, uv).rgba * weight;
mediump float weight = smstsq(1. - (abs(i / bloomRadius - 1.)));
color.rgb += texture2D(rendered, uv).rgb * weight;
sum += weight;
uv += vec2(0., texelSize0.y);
}