f8bf05b294
As pointed out by Mike Kaganski in https://gerrit.libreoffice.org/c/core/+/177805 we are setting the loop counter to 0 and then immediately reinitializing it to 1 in the for loop. As this is not necessary, just declaring the variable initially without initializing it. Change-Id: Ia91cd6c46a62786dc14c459f1b44daecd758ec90 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/180567 Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com> Tested-by: Jenkins
137 lines
5.0 KiB
C++
137 lines
5.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <tools/color.hxx>
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#include <vcl/BitmapColor.hxx>
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#include <vcl/BitmapWriteAccess.hxx>
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#include <bitmap/BlendFrameCache.hxx>
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BlendFrameCache::BlendFrameCache(Size const& rSize, sal_uInt8 nAlpha, Color const& rColorTopLeft,
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Color const& rColorTopRight, Color const& rColorBottomRight,
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Color const& rColorBottomLeft)
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: m_aLastSize(rSize)
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, m_nLastAlpha(nAlpha)
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, m_aLastColorTopLeft(rColorTopLeft)
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, m_aLastColorTopRight(rColorTopRight)
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, m_aLastColorBottomRight(rColorBottomRight)
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, m_aLastColorBottomLeft(rColorBottomLeft)
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{
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if (rSize.Width() <= 1 || rSize.Height() <= 1)
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return;
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sal_uInt8 aEraseTrans(0xff);
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Bitmap aContent(rSize, vcl::PixelFormat::N24_BPP);
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AlphaMask aAlpha(rSize, &aEraseTrans);
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aContent.Erase(COL_BLACK);
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{
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BitmapScopedWriteAccess pContent(aContent);
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BitmapScopedWriteAccess pAlpha(aAlpha);
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if (!pContent || !pAlpha)
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return;
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Scanline pScanContent = pContent->GetScanline(0);
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Scanline pScanAlpha = pContent->GetScanline(0);
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// x == 0, y == 0, top-left corner
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pContent->SetPixelOnData(pScanContent, 0, rColorTopLeft);
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pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
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tools::Long x;
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const tools::Long nW(rSize.Width());
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// y == 0, top line left to right
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for (x = 1; x < nW - 1; x++)
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{
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Color aMix(rColorTopLeft);
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aMix.Merge(rColorTopRight, 255 - sal_uInt8((x * 255) / nW));
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pContent->SetPixelOnData(pScanContent, x, aMix);
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pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
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}
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// x == nW - 1, y == 0, top-right corner
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// #i123690# Caution! When nW is 1, x == nW is possible (!)
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if (x < nW)
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{
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pContent->SetPixelOnData(pScanContent, x, rColorTopRight);
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pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
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}
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tools::Long y;
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const tools::Long nH(rSize.Height());
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// x == 0 and nW - 1, left and right line top-down
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for (y = 1; y < nH - 1; y++)
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{
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pScanContent = pContent->GetScanline(y);
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pScanAlpha = pContent->GetScanline(y);
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Color aMixA(rColorTopLeft);
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aMixA.Merge(rColorBottomLeft, 255 - sal_uInt8((y * 255) / nH));
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pContent->SetPixelOnData(pScanContent, 0, aMixA);
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pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
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// #i123690# Caution! When nW is 1, x == nW is possible (!)
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if (x < nW)
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{
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Color aMixB(rColorTopRight);
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aMixB.Merge(rColorBottomRight, 255 - sal_uInt8((y * 255) / nH));
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pContent->SetPixelOnData(pScanContent, x, aMixB);
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pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
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}
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}
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// #i123690# Caution! When nH is 1, y == nH is possible (!)
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if (y < nH)
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{
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// x == 0, y == nH - 1, bottom-left corner
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pContent->SetPixelOnData(pScanContent, 0, rColorBottomLeft);
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pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
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// y == nH - 1, bottom line left to right
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for (x = 1; x < nW - 1; x++)
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{
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Color aMix(rColorBottomLeft);
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aMix.Merge(rColorBottomRight, 255 - sal_uInt8(((x - 0) * 255) / nW));
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pContent->SetPixelOnData(pScanContent, x, aMix);
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pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
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}
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// x == nW - 1, y == nH - 1, bottom-right corner
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// #i123690# Caution! When nW is 1, x == nW is possible (!)
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if (x < nW)
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{
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pContent->SetPixelOnData(pScanContent, x, rColorBottomRight);
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pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
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}
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}
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}
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m_aLastResult = BitmapEx(aContent, aAlpha);
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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