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blur transparent 24bit windows

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also stretch blur opacity a bit (ie.
slightly transparent windows get more
blur compared to their opacity)

REVIEW: 124148
This commit is contained in:
Thomas Lübking 2015-06-22 15:48:48 +02:00
parent 9139cca72c
commit 0c71d514ce
1 changed files with 9 additions and 2 deletions
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11
effects/blur/blur.cpp
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@ -385,7 +385,7 @@ bool BlurEffect::shouldBlur(const EffectWindow *w, int mask, const WindowPaintDa
bool blurBehindDecos = effects->decorationsHaveAlpha() &&
effects->decorationSupportsBlurBehind();
if (!w->hasAlpha() && !(blurBehindDecos && w->hasDecoration()))
if (!w->hasAlpha() && w->opacity() >= 1.0 && !(blurBehindDecos && w->hasDecoration()))
return false;
return true;
@ -479,7 +479,14 @@ void BlurEffect::doBlur(const QRegion& shape, const QRect& screen, const float o
// Modulate the blurred texture with the window opacity if the window isn't opaque
if (opacity < 1.0) {
glEnable(GL_BLEND);
glBlendColor(0, 0, 0, opacity);
#if 1 // bow shape, always above y = x
float o = 1.0f-opacity;
o = 1.0f - o*o;
#else // sigmoid shape, above y = x for x > 0.5, below y = x for x < 0.5
float o = 2.0f*opacity - 1.0f;
o = 0.5f + o / (1.0f + qAbs(o));
#endif
glBlendColor(0, 0, 0, o);
glBlendFunc(GL_CONSTANT_ALPHA, GL_ONE_MINUS_CONSTANT_ALPHA);
}