1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <vcl/bitmapex.hxx>
#include <vcl/BitmapAlphaClampFilter.hxx>
#include <bitmapwriteaccess.hxx>
BitmapEx BitmapAlphaClampFilter::execute(BitmapEx const& rBitmapEx) const
{
if (!rBitmapEx.IsTransparent())
return rBitmapEx;
AlphaMask aBitmapAlpha(rBitmapEx.GetAlpha());
{
AlphaScopedWriteAccess pWriteAlpha(aBitmapAlpha);
const Size aSize(rBitmapEx.GetSizePixel());
for (long nY = 0; nY < aSize.Height(); ++nY)
{
Scanline pScanAlpha = pWriteAlpha->GetScanline(nY);
for (long nX = 0; nX < aSize.Width(); ++nX)
{
BitmapColor aBitmapAlphaValue(pWriteAlpha->GetPixelFromData(pScanAlpha, nX));
if (aBitmapAlphaValue.GetIndex() > mcThreshold)
{
aBitmapAlphaValue.SetIndex(255);
pWriteAlpha->SetPixelOnData(pScanAlpha, nX, aBitmapAlphaValue);
}
}
}
}
return BitmapEx(rBitmapEx.GetBitmap(), aBitmapAlpha);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
