minetest/client/shaders/extract_bloom/opengl_fragment.glsl
x2048 4cd6b773bb
Fix no color values on bloom texture (#13197)
Align meaning of 'exposure' variable across different stages
Put 'exposure' variable behind ENABLE_AUTO_EXPOSURE
2023-02-10 21:04:37 +01:00

36 lines
761 B
GLSL

#define rendered texture0
struct ExposureParams {
float compensationFactor;
};
uniform sampler2D rendered;
uniform mediump float bloomStrength;
uniform ExposureParams exposureParams;
#ifdef GL_ES
varying mediump vec2 varTexCoord;
#else
centroid varying vec2 varTexCoord;
#endif
#ifdef ENABLE_AUTO_EXPOSURE
varying float exposure; // linear exposure factor, see vertex shader
#endif
void main(void)
{
vec2 uv = varTexCoord.st;
vec3 color = texture2D(rendered, uv).rgb;
// translate to linear colorspace (approximate)
color = pow(color, vec3(2.2));
color *= exposureParams.compensationFactor * bloomStrength;
#ifdef ENABLE_AUTO_EXPOSURE
color *= exposure;
#endif
gl_FragColor = vec4(color, 1.0); // force full alpha to avoid holes in the image.
}