diff options
Diffstat (limited to 'indra/llimage/llimage.cpp')
| -rwxr-xr-x | indra/llimage/llimage.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp index da22ed5e5b..d84989f9c8 100755 --- a/indra/llimage/llimage.cpp +++ b/indra/llimage/llimage.cpp @@ -103,7 +103,8 @@ LLImageBase::LLImageBase() mHistoBlue(NULL), mHistoBrightness(NULL), mVignetteMode(VIGNETTE_MODE_NONE), - mVignetteGamma(1.0) + mVignetteGamma(1.0), + mVignetteMin(0.0) { } @@ -1280,10 +1281,11 @@ void LLImageRaw::colorCorrect(const U8* lut_red, const U8* lut_green, const U8* } } -void LLImageRaw::setVignette(EVignetteMode mode, F32 gamma) +void LLImageRaw::setVignette(EVignetteMode mode, F32 gamma, F32 min) { mVignetteMode = mode; mVignetteGamma = gamma; + mVignetteMin = llclampf(min); // We always center the vignette on the image and fits it in the image smallest dimension mVignetteCenterX = getWidth()/2; mVignetteCenterY = getHeight()/2; @@ -1293,9 +1295,11 @@ void LLImageRaw::setVignette(EVignetteMode mode, F32 gamma) F32 LLImageRaw::getVignetteAlpha(S32 i, S32 j) { // alpha is a modified gaussian value, with a center and fading in a circular pattern toward the edges - // the gamma parameter controls the intensity of the drop down from alpha 1.0 to 0.0 + // The gamma parameter controls the intensity of the drop down from alpha 1.0 (center) to 0.0 F32 d_center_square = (i - mVignetteCenterX)*(i - mVignetteCenterX) + (j - mVignetteCenterY)*(j - mVignetteCenterY); - return powf(F_E, -(powf((d_center_square/(mVignetteWidth*mVignetteWidth)),mVignetteGamma)/2.0f)); + F32 alpha = powf(F_E, -(powf((d_center_square/(mVignetteWidth*mVignetteWidth)),mVignetteGamma)/2.0f)); + // We rescale alpha between min and 1.0 so to avoid complete fading if so desired. + return (mVignetteMin + alpha * (1.0 - mVignetteMin)); } U32* LLImageRaw::getBrightnessHistogram() |