Clément Foucault
84f98e28e3
The issue was caused by `textureSize()` returning the size of the level 0 even when the min texture level is higher than 0. Using a uniform to pass the correct size fixes the issue. This issue also affected the downsampling of radiance for reflections and refractions. This does not affect anything other than the recusive downsampling shaders.
43 lines
1.1 KiB
GLSL
43 lines
1.1 KiB
GLSL
|
|
#pragma BLENDER_REQUIRE(common_math_lib.glsl)
|
|
|
|
/**
|
|
* Simple down-sample shader.
|
|
* Do a gaussian filter using 4 bilinear texture samples.
|
|
*/
|
|
|
|
uniform sampler2D source;
|
|
uniform float fireflyFactor;
|
|
|
|
#ifndef COPY_SRC
|
|
uniform vec2 texelSize;
|
|
#endif
|
|
|
|
out vec4 FragColor;
|
|
|
|
void main()
|
|
{
|
|
#ifdef COPY_SRC
|
|
vec2 uvs = gl_FragCoord.xy / vec2(textureSize(source, 0));
|
|
FragColor = textureLod(source, uvs, 0.0);
|
|
FragColor = safe_color(FragColor);
|
|
|
|
/* Clamped brightness. */
|
|
float luma = max(1e-8, max_v3(FragColor.rgb));
|
|
FragColor *= 1.0 - max(0.0, luma - fireflyFactor) / luma;
|
|
|
|
#else
|
|
/* NOTE(@fclem): textureSize() does not work the same on all implementations
|
|
* when changing the min and max texture levels. Use uniform instead (see T87801). */
|
|
vec2 uvs = gl_FragCoord.xy * texelSize;
|
|
vec4 ofs = texelSize.xyxy * vec4(0.75, 0.75, -0.75, -0.75);
|
|
uvs *= 2.0;
|
|
|
|
FragColor = textureLod(source, uvs + ofs.xy, 0.0);
|
|
FragColor += textureLod(source, uvs + ofs.xw, 0.0);
|
|
FragColor += textureLod(source, uvs + ofs.zy, 0.0);
|
|
FragColor += textureLod(source, uvs + ofs.zw, 0.0);
|
|
FragColor *= 0.25;
|
|
#endif
|
|
}
|