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Fixing StackBlur alpha

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This commit is contained in:
Tuna Hunerli
2019-04-10 20:57:20 -07:00
committed by Joshua Granick
parent 20f626dab8
commit 7d3539ab8e
1 changed files with 67 additions and 33 deletions
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100
src/lime/_internal/graphics/StackBlur.hx
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@@ -33,8 +33,9 @@ class StackBlur
if (iterations > 3) iterations = 3;
var px = image.data;
var x:Int=0, y:Int=0, i:Int=0, p:Int=0, yp:Int=0, yi:Int=0, yw:Int=0;
var r:Int=0, g:Int=0, b:Int=0, a:Int=0, pr:Int=0, pg:Int=0, pb:Int=0, pa:Int=0;
var x:Int, y:Int, i:Int, p:Int, yp:Int, yi:Int, yw:Int;
var r:Int, g:Int, b:Int, a:Int, pr:Int, pg:Int, pb:Int, pa:Int;
var f:Float;
var divx = (radiusX + radiusX + 1);
var divy = (radiusY + radiusY + 1);
@@ -96,10 +97,10 @@ class StackBlur
for (i in 1...rxp1)
{
p = yi + ((w1 < i ? w1 : i) << 2);
r += ( sx.r = px[p]);
g += ( sx.g = px[p+1]);
b += ( sx.b = px[p+2]);
a += ( sx.a = px[p+3]);
r += (sx.r = px[p]);
g += (sx.g = px[p + 1]);
b += (sx.b = px[p + 2]);
a += (sx.a = px[p + 3]);
sx = sx.n;
}
@@ -111,10 +112,10 @@ class StackBlur
px[yi++] = (b * ms) >>> ss;
px[yi++] = (a * ms) >>> ss;
p = (yw + ((p = x + radiusX + 1) < w1 ? p : w1)) << 2;
r -= si.r - ( si.r = px[p]);
g -= si.g - ( si.g = px[p+1]);
b -= si.b - ( si.b = px[p+2]);
a -= si.a - ( si.a = px[p+3]);
r -= si.r - (si.r = px[p]);
g -= si.g - (si.g = px[p + 1]);
b -= si.b - (si.b = px[p + 2]);
a -= si.a - (si.a = px[p + 3]);
si = si.n;
}
yw += w;
@@ -139,42 +140,75 @@ class StackBlur
sy = sy.n;
}
yp = w;
for(i in 1...(radiusY + 1))
for (i in 1...(radiusY + 1))
{
yi = ( yp + x ) << 2;
r += ( sy.r = px[yi]);
g += ( sy.g = px[yi+1]);
b += ( sy.b = px[yi+2]);
a += ( sy.a = px[yi+3]);
yi = (yp + x) << 2;
r += (sy.r = px[yi]);
g += (sy.g = px[yi + 1]);
b += (sy.b = px[yi + 2]);
a += (sy.a = px[yi + 3]);
sy = sy.n;
if( i < h1 )
if (i < h1)
{
yp += w;
}
}
yi = x;
si = ssy;
for (y in 0...h)
if (iterations > 0)
{
p = yi << 2;
px[p+3] = pa = (a * ms) >>> ss;
if ( pa > 0 )
for (y in 0...h)
{
px[p] = (r * ms) >>> ss;
px[p+1] = (g * ms) >>> ss;
px[p+2] = (b * ms) >>> ss;
p = yi << 2;
px[p + 3] = pa = (a * ms) >>> ss;
if (pa > 0)
{
px[p] = ((r * ms) >>> ss);
px[p + 1] = ((g * ms) >>> ss);
px[p + 2] = ((b * ms) >>> ss);
}
else
{
px[p] = px[p + 1] = px[p + 2] = 0;
}
p = (x + (((p = y + ryp1) < h1 ? p : h1) * w)) << 2;
r -= si.r - (si.r = px[p]);
g -= si.g - (si.g = px[p + 1]);
b -= si.b - (si.b = px[p + 2]);
a -= si.a - (si.a = px[p + 3]);
si = si.n;
yi += w;
}
else
}
else
{
for (y in 0...h)
{
px[p] = px[p+1] = px[p+2] = 0;
p = yi << 2;
px[p + 3] = pa = (a * ms) >>> ss;
if (pa > 0)
{
f = 255 / pa;
pr = Std.int(((r * ms) >>> ss) * f);
pg = Std.int(((g * ms) >>> ss) * f);
pb = Std.int(((b * ms) >>> ss) * f);
px[p] = pr > 255 ? 255 : pr;
px[p + 1] = pg > 255 ? 255 : pg;
px[p + 2] = pb > 255 ? 255 : pb;
}
else
{
px[p] = px[p + 1] = px[p + 2] = 0;
}
p = (x + (((p = y + ryp1) < h1 ? p : h1) * w)) << 2;
r -= si.r - (si.r = px[p]);
g -= si.g - (si.g = px[p + 1]);
b -= si.b - (si.b = px[p + 2]);
a -= si.a - (si.a = px[p + 3]);
si = si.n;
yi += w;
}
p = ( x + (( ( p = y + ryp1) < h1 ? p : h1 ) * w )) << 2;
r -= si.r - (si.r = px[p]);
g -= si.g - (si.g = px[p+1]);
b -= si.b - (si.b = px[p+2]);
a -= si.a - (si.a = px[p+3]);
si = si.n;
yi += w;
}
}
}