diff options
Diffstat (limited to 'client/shaders/extract_bloom')
| -rw-r--r-- | client/shaders/extract_bloom/opengl_fragment.glsl | 11 | ||||
| -rw-r--r-- | client/shaders/extract_bloom/opengl_vertex.glsl | 9 |
2 files changed, 17 insertions, 3 deletions
diff --git a/client/shaders/extract_bloom/opengl_fragment.glsl b/client/shaders/extract_bloom/opengl_fragment.glsl index 45f5e9c6f..36671b06c 100644 --- a/client/shaders/extract_bloom/opengl_fragment.glsl +++ b/client/shaders/extract_bloom/opengl_fragment.glsl @@ -14,7 +14,9 @@ varying mediump vec2 varTexCoord; centroid varying vec2 varTexCoord; #endif -varying float exposure; +#ifdef ENABLE_AUTO_EXPOSURE +varying float exposure; // linear exposure factor, see vertex shader +#endif void main(void) { @@ -23,6 +25,11 @@ void main(void) // translate to linear colorspace (approximate) color = pow(color, vec3(2.2)); - color *= pow(2., exposure) * exposureParams.compensationFactor * bloomStrength; + 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. } diff --git a/client/shaders/extract_bloom/opengl_vertex.glsl b/client/shaders/extract_bloom/opengl_vertex.glsl index 479ae1079..2fee884ba 100644 --- a/client/shaders/extract_bloom/opengl_vertex.glsl +++ b/client/shaders/extract_bloom/opengl_vertex.glsl @@ -1,18 +1,25 @@ +#ifdef ENABLE_AUTO_EXPOSURE #define exposureMap texture1 uniform sampler2D exposureMap; +varying float exposure; +#endif + #ifdef GL_ES varying mediump vec2 varTexCoord; #else centroid varying vec2 varTexCoord; #endif -varying float exposure; void main(void) { +#ifdef ENABLE_AUTO_EXPOSURE + // value in the texture is on a logarithtmic scale exposure = texture2D(exposureMap, vec2(0.5)).r; + exposure = pow(2., exposure); +#endif varTexCoord.st = inTexCoord0.st; gl_Position = inVertexPosition; |