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diff --git a/vcl/source/bitmap/bitmappaint.cxx b/vcl/source/bitmap/bitmappaint.cxx
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+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <tools/poly.hxx>
+#include <tools/helpers.hxx>
+
+#include <vcl/bitmap.hxx>
+#include <vcl/alpha.hxx>
+
+#include <bitmap/BitmapWriteAccess.hxx>
+#include <salbmp.hxx>
+#include <svdata.hxx>
+#include <salinst.hxx>
+
+#include <algorithm>
+#include <memory>
+
+bool Bitmap::Erase(const Color& rFillColor)
+{
+ if (IsEmpty())
+ return true;
+
+ // implementation specific replace
+ std::shared_ptr<SalBitmap> xImpBmp(ImplGetSVData()->mpDefInst->CreateSalBitmap());
+ if (xImpBmp->Create(*mxSalBmp) && xImpBmp->Erase(rFillColor))
+ {
+ ImplSetSalBitmap(xImpBmp);
+ maPrefMapMode = MapMode(MapUnit::MapPixel);
+ maPrefSize = xImpBmp->GetSize();
+ return true;
+ }
+
+ BitmapScopedWriteAccess pWriteAcc(*this);
+ bool bRet = false;
+
+ if (pWriteAcc)
+ {
+ pWriteAcc->Erase(rFillColor);
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+bool Bitmap::Invert()
+{
+ BitmapScopedWriteAccess pAcc(*this);
+ bool bRet = false;
+
+ if (pAcc)
+ {
+ if (pAcc->HasPalette())
+ {
+ BitmapPalette aBmpPal(pAcc->GetPalette());
+ const sal_uInt16 nCount = aBmpPal.GetEntryCount();
+
+ for (sal_uInt16 i = 0; i < nCount; i++)
+ {
+ aBmpPal[i].Invert();
+ }
+
+ pAcc->SetPalette(aBmpPal);
+ }
+ else
+ {
+ const tools::Long nWidth = pAcc->Width();
+ const tools::Long nHeight = pAcc->Height();
+
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; nX++)
+ {
+ BitmapColor aBmpColor = pAcc->GetPixelFromData(pScanline, nX);
+ aBmpColor.Invert();
+ pAcc->SetPixelOnData(pScanline, nX, aBmpColor);
+ }
+ }
+ }
+
+ mxSalBmp->InvalidateChecksum();
+ pAcc.reset();
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+namespace
+{
+// Put each scanline's content horizontally mirrored into the other one.
+// (optimized version accessing pixel values directly).
+template <int bitCount>
+void mirrorScanlines(Scanline scanline1, Scanline scanline2, tools::Long nWidth)
+{
+ constexpr int byteCount = bitCount / 8;
+ Scanline pos1 = scanline1;
+ Scanline pos2 = scanline2 + (nWidth - 1) * byteCount; // last in second scanline
+ sal_uInt8 tmp[byteCount];
+ for (tools::Long i = 0; i < nWidth; ++i)
+ {
+ memcpy(tmp, pos1, byteCount);
+ memcpy(pos1, pos2, byteCount);
+ memcpy(pos2, tmp, byteCount);
+ pos1 += byteCount;
+ pos2 -= byteCount;
+ }
+}
+}
+
+bool Bitmap::Mirror(BmpMirrorFlags nMirrorFlags)
+{
+ bool bHorz(nMirrorFlags & BmpMirrorFlags::Horizontal);
+ bool bVert(nMirrorFlags & BmpMirrorFlags::Vertical);
+ bool bRet = false;
+
+ if (bHorz && !bVert)
+ {
+ BitmapScopedWriteAccess pAcc(*this);
+
+ if (pAcc)
+ {
+ const tools::Long nWidth = pAcc->Width();
+ const tools::Long nHeight = pAcc->Height();
+ const tools::Long nWidth1 = nWidth - 1;
+ const tools::Long nWidth_2 = nWidth / 2;
+ const tools::Long nSecondHalf = nWidth - nWidth_2;
+
+ switch (pAcc->GetBitCount())
+ {
+ // Special-case these, swap the halves of scanlines while mirroring them.
+ case 32:
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ mirrorScanlines<32>(pAcc->GetScanline(nY),
+ pAcc->GetScanline(nY) + 4 * nSecondHalf, nWidth_2);
+ break;
+ case 24:
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ mirrorScanlines<24>(pAcc->GetScanline(nY),
+ pAcc->GetScanline(nY) + 3 * nSecondHalf, nWidth_2);
+ break;
+ case 8:
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ mirrorScanlines<8>(pAcc->GetScanline(nY),
+ pAcc->GetScanline(nY) + nSecondHalf, nWidth_2);
+ break;
+ default:
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ for (tools::Long nX = 0, nOther = nWidth1; nX < nWidth_2; nX++, nOther--)
+ {
+ const BitmapColor aTemp(pAcc->GetPixelFromData(pScanline, nX));
+
+ pAcc->SetPixelOnData(pScanline, nX,
+ pAcc->GetPixelFromData(pScanline, nOther));
+ pAcc->SetPixelOnData(pScanline, nOther, aTemp);
+ }
+ }
+ }
+
+ pAcc.reset();
+ bRet = true;
+ }
+ }
+ else if (bVert && !bHorz)
+ {
+ BitmapScopedWriteAccess pAcc(*this);
+
+ if (pAcc)
+ {
+ const tools::Long nScanSize = pAcc->GetScanlineSize();
+ std::unique_ptr<sal_uInt8[]> pBuffer(new sal_uInt8[nScanSize]);
+ const tools::Long nHeight = pAcc->Height();
+ const tools::Long nHeight1 = nHeight - 1;
+ const tools::Long nHeight_2 = nHeight >> 1;
+
+ for (tools::Long nY = 0, nOther = nHeight1; nY < nHeight_2; nY++, nOther--)
+ {
+ memcpy(pBuffer.get(), pAcc->GetScanline(nY), nScanSize);
+ memcpy(pAcc->GetScanline(nY), pAcc->GetScanline(nOther), nScanSize);
+ memcpy(pAcc->GetScanline(nOther), pBuffer.get(), nScanSize);
+ }
+
+ pAcc.reset();
+ bRet = true;
+ }
+ }
+ else if (bHorz && bVert)
+ {
+ BitmapScopedWriteAccess pAcc(*this);
+
+ if (pAcc)
+ {
+ const tools::Long nWidth = pAcc->Width();
+ const tools::Long nWidth1 = nWidth - 1;
+ const tools::Long nHeight = pAcc->Height();
+ tools::Long nHeight_2 = nHeight / 2;
+ const tools::Long nWidth_2 = nWidth / 2;
+ const tools::Long nSecondHalf = nWidth - nWidth_2;
+
+ switch (pAcc->GetBitCount())
+ {
+ case 32:
+ for (tools::Long nY = 0, nOtherY = nHeight - 1; nY < nHeight_2; nY++, nOtherY--)
+ mirrorScanlines<32>(pAcc->GetScanline(nY), pAcc->GetScanline(nOtherY),
+ nWidth);
+ if (nHeight & 1)
+ mirrorScanlines<32>(pAcc->GetScanline(nHeight_2),
+ pAcc->GetScanline(nHeight_2) + 4 * nSecondHalf,
+ nWidth_2);
+ break;
+ case 24:
+ for (tools::Long nY = 0, nOtherY = nHeight - 1; nY < nHeight_2; nY++, nOtherY--)
+ mirrorScanlines<24>(pAcc->GetScanline(nY), pAcc->GetScanline(nOtherY),
+ nWidth);
+ if (nHeight & 1)
+ mirrorScanlines<24>(pAcc->GetScanline(nHeight_2),
+ pAcc->GetScanline(nHeight_2) + 3 * nSecondHalf,
+ nWidth_2);
+ break;
+ case 8:
+ for (tools::Long nY = 0, nOtherY = nHeight - 1; nY < nHeight_2; nY++, nOtherY--)
+ mirrorScanlines<8>(pAcc->GetScanline(nY), pAcc->GetScanline(nOtherY),
+ nWidth);
+ if (nHeight & 1)
+ mirrorScanlines<8>(pAcc->GetScanline(nHeight_2),
+ pAcc->GetScanline(nHeight_2) + nSecondHalf, nWidth_2);
+ break;
+ default:
+ for (tools::Long nY = 0, nOtherY = nHeight - 1; nY < nHeight_2; nY++, nOtherY--)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ Scanline pScanlineOther = pAcc->GetScanline(nOtherY);
+ for (tools::Long nX = 0, nOtherX = nWidth1; nX < nWidth; nX++, nOtherX--)
+ {
+ const BitmapColor aTemp(pAcc->GetPixelFromData(pScanline, nX));
+
+ pAcc->SetPixelOnData(pScanline, nX,
+ pAcc->GetPixelFromData(pScanlineOther, nOtherX));
+ pAcc->SetPixelOnData(pScanlineOther, nOtherX, aTemp);
+ }
+ }
+
+ // if necessary, also mirror the middle line horizontally
+ if (nHeight & 1)
+ {
+ Scanline pScanline = pAcc->GetScanline(nHeight_2);
+ for (tools::Long nX = 0, nOtherX = nWidth1; nX < nWidth_2; nX++, nOtherX--)
+ {
+ const BitmapColor aTemp(pAcc->GetPixelFromData(pScanline, nX));
+ pAcc->SetPixelOnData(pScanline, nX,
+ pAcc->GetPixelFromData(pScanline, nOtherX));
+ pAcc->SetPixelOnData(pScanline, nOtherX, aTemp);
+ }
+ }
+ }
+
+ pAcc.reset();
+ bRet = true;
+ }
+ }
+ else
+ bRet = true;
+
+ return bRet;
+}
+
+bool Bitmap::Rotate(Degree10 nAngle10, const Color& rFillColor)
+{
+ bool bRet = false;
+
+ nAngle10 %= 3600_deg10;
+ nAngle10 = (nAngle10 < 0_deg10) ? (Degree10(3599) + nAngle10) : nAngle10;
+
+ if (!nAngle10)
+ bRet = true;
+ else if (nAngle10 == 1800_deg10)
+ bRet = Mirror(BmpMirrorFlags::Horizontal | BmpMirrorFlags::Vertical);
+ else
+ {
+ ScopedReadAccess pReadAcc(*this);
+ Bitmap aRotatedBmp;
+
+ if (pReadAcc)
+ {
+ const Size aSizePix(GetSizePixel());
+
+ if (nAngle10 == 900_deg10 || nAngle10 == 2700_deg10)
+ {
+ const Size aNewSizePix(aSizePix.Height(), aSizePix.Width());
+ Bitmap aNewBmp(aNewSizePix, getPixelFormat(), &pReadAcc->GetPalette());
+ BitmapScopedWriteAccess pWriteAcc(aNewBmp);
+
+ if (pWriteAcc)
+ {
+ const tools::Long nWidth = aSizePix.Width();
+ const tools::Long nWidth1 = nWidth - 1;
+ const tools::Long nHeight = aSizePix.Height();
+ const tools::Long nHeight1 = nHeight - 1;
+ const tools::Long nNewWidth = aNewSizePix.Width();
+ const tools::Long nNewHeight = aNewSizePix.Height();
+
+ if (nAngle10 == 900_deg10)
+ {
+ for (tools::Long nY = 0, nOtherX = nWidth1; nY < nNewHeight;
+ nY++, nOtherX--)
+ {
+ Scanline pScanline = pWriteAcc->GetScanline(nY);
+ for (tools::Long nX = 0, nOtherY = 0; nX < nNewWidth; nX++)
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX,
+ pReadAcc->GetPixel(nOtherY++, nOtherX));
+ }
+ }
+ }
+ else if (nAngle10 == 2700_deg10)
+ {
+ for (tools::Long nY = 0, nOtherX = 0; nY < nNewHeight; nY++, nOtherX++)
+ {
+ Scanline pScanline = pWriteAcc->GetScanline(nY);
+ for (tools::Long nX = 0, nOtherY = nHeight1; nX < nNewWidth; nX++)
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX,
+ pReadAcc->GetPixel(nOtherY--, nOtherX));
+ }
+ }
+ }
+
+ pWriteAcc.reset();
+ }
+
+ aRotatedBmp = aNewBmp;
+ }
+ else
+ {
+ Point aTmpPoint;
+ tools::Rectangle aTmpRectangle(aTmpPoint, aSizePix);
+ tools::Polygon aPoly(aTmpRectangle);
+ aPoly.Rotate(aTmpPoint, nAngle10);
+
+ tools::Rectangle aNewBound(aPoly.GetBoundRect());
+ const Size aNewSizePix(aNewBound.GetSize());
+ Bitmap aNewBmp(aNewSizePix, getPixelFormat(), &pReadAcc->GetPalette());
+ BitmapScopedWriteAccess pWriteAcc(aNewBmp);
+
+ if (pWriteAcc)
+ {
+ const BitmapColor aFillColor(pWriteAcc->GetBestMatchingColor(rFillColor));
+ const double fCosAngle = cos(toRadians(nAngle10));
+ const double fSinAngle = sin(toRadians(nAngle10));
+ const double fXMin = aNewBound.Left();
+ const double fYMin = aNewBound.Top();
+ const sal_Int32 nWidth = aSizePix.Width();
+ const sal_Int32 nHeight = aSizePix.Height();
+ const sal_Int32 nNewWidth = aNewSizePix.Width();
+ const sal_Int32 nNewHeight = aNewSizePix.Height();
+ // we store alternating values of cos/sin. We do this instead of
+ // separate arrays to improve cache hit.
+ std::unique_ptr<sal_Int32[]> pCosSinX(new sal_Int32[nNewWidth * 2]);
+ std::unique_ptr<sal_Int32[]> pCosSinY(new sal_Int32[nNewHeight * 2]);
+
+ for (sal_Int32 nIdx = 0, nX = 0; nX < nNewWidth; nX++)
+ {
+ const double fTmp = (fXMin + nX) * 64;
+
+ pCosSinX[nIdx++] = std::round(fCosAngle * fTmp);
+ pCosSinX[nIdx++] = std::round(fSinAngle * fTmp);
+ }
+
+ for (sal_Int32 nIdx = 0, nY = 0; nY < nNewHeight; nY++)
+ {
+ const double fTmp = (fYMin + nY) * 64;
+
+ pCosSinY[nIdx++] = std::round(fCosAngle * fTmp);
+ pCosSinY[nIdx++] = std::round(fSinAngle * fTmp);
+ }
+
+ for (sal_Int32 nCosSinYIdx = 0, nY = 0; nY < nNewHeight; nY++)
+ {
+ sal_Int32 nCosY = pCosSinY[nCosSinYIdx++];
+ sal_Int32 nSinY = pCosSinY[nCosSinYIdx++];
+ Scanline pScanline = pWriteAcc->GetScanline(nY);
+
+ for (sal_Int32 nCosSinXIdx = 0, nX = 0; nX < nNewWidth; nX++)
+ {
+ sal_Int32 nRotX = (pCosSinX[nCosSinXIdx++] - nSinY) >> 6;
+ sal_Int32 nRotY = (pCosSinX[nCosSinXIdx++] + nCosY) >> 6;
+
+ if ((nRotX > -1) && (nRotX < nWidth) && (nRotY > -1)
+ && (nRotY < nHeight))
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX,
+ pReadAcc->GetPixel(nRotY, nRotX));
+ }
+ else
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX, aFillColor);
+ }
+ }
+ }
+
+ pWriteAcc.reset();
+ }
+
+ aRotatedBmp = aNewBmp;
+ }
+
+ pReadAcc.reset();
+ }
+
+ bRet = !aRotatedBmp.IsEmpty();
+ if (bRet)
+ ReassignWithSize(aRotatedBmp);
+ }
+
+ return bRet;
+};
+
+Bitmap Bitmap::CreateMask(const Color& rTransColor, sal_uInt8 nTol) const
+{
+ ScopedReadAccess pReadAcc(const_cast<Bitmap&>(*this));
+
+ // Historically LO used 1bpp masks, but 8bpp masks are much faster,
+ // better supported by hardware, and the memory savings are not worth
+ // it anymore.
+ // TODO: Possibly remove the 1bpp code later.
+ constexpr bool use8BitMask = true;
+
+ if (!nTol && pReadAcc
+ && (pReadAcc->GetScanlineFormat() == ScanlineFormat::N1BitLsbPal
+ || pReadAcc->GetScanlineFormat() == ScanlineFormat::N1BitMsbPal)
+ && pReadAcc->GetBestMatchingColor(COL_WHITE) == pReadAcc->GetBestMatchingColor(rTransColor))
+ {
+ // if we're a 1 bit pixel already, and the transcolor matches the color that would replace it
+ // already, then just return a copy
+ return *this;
+ }
+
+ auto ePixelFormat = use8BitMask ? vcl::PixelFormat::N8_BPP : vcl::PixelFormat::N1_BPP;
+ Bitmap aNewBmp(GetSizePixel(), ePixelFormat,
+ use8BitMask ? &Bitmap::GetGreyPalette(256) : nullptr);
+ BitmapScopedWriteAccess pWriteAcc(aNewBmp);
+ bool bRet = false;
+
+ if (pWriteAcc && pReadAcc)
+ {
+ const tools::Long nWidth = pReadAcc->Width();
+ const tools::Long nHeight = pReadAcc->Height();
+ const BitmapColor aBlack(pWriteAcc->GetBestMatchingColor(COL_BLACK));
+ const BitmapColor aWhite(pWriteAcc->GetBestMatchingColor(COL_WHITE));
+
+ if (!nTol)
+ {
+ const BitmapColor aTest(pReadAcc->GetBestMatchingColor(rTransColor));
+
+ if (pWriteAcc->GetBitCount() == 1
+ && pReadAcc->GetScanlineFormat() == ScanlineFormat::N8BitPal)
+ {
+ // optimized for 8Bit source palette
+ const sal_uInt8 cTest = aTest.GetIndex();
+
+ if (pWriteAcc->GetScanlineFormat() == ScanlineFormat::N1BitMsbPal
+ && aWhite.GetIndex() == 1)
+ {
+ // optimized for 1Bit-MSB destination palette
+ for (tools::Long nY = 0; nY < nHeight; ++nY)
+ {
+ Scanline pSrc = pReadAcc->GetScanline(nY);
+ Scanline pDst = pWriteAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; ++nX)
+ {
+ if (cTest == pSrc[nX])
+ pDst[nX >> 3] |= 1 << (7 - (nX & 7));
+ else
+ pDst[nX >> 3] &= ~(1 << (7 - (nX & 7)));
+ }
+ }
+ }
+ else
+ {
+ for (tools::Long nY = 0; nY < nHeight; ++nY)
+ {
+ Scanline pSrc = pReadAcc->GetScanline(nY);
+ Scanline pDst = pWriteAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; ++nX)
+ {
+ if (cTest == pSrc[nX])
+ pWriteAcc->SetPixelOnData(pDst, nX, aWhite);
+ else
+ pWriteAcc->SetPixelOnData(pDst, nX, aBlack);
+ }
+ }
+ }
+ }
+ else if (pWriteAcc->GetScanlineFormat() == pReadAcc->GetScanlineFormat()
+ && aWhite.GetIndex() == 1
+ && (pReadAcc->GetScanlineFormat() == ScanlineFormat::N1BitLsbPal
+ || pReadAcc->GetScanlineFormat() == ScanlineFormat::N1BitMsbPal))
+ {
+ for (tools::Long nY = 0; nY < nHeight; ++nY)
+ {
+ Scanline pSrc = pReadAcc->GetScanline(nY);
+ Scanline pDst = pWriteAcc->GetScanline(nY);
+ assert(pWriteAcc->GetScanlineSize() == pReadAcc->GetScanlineSize());
+ const tools::Long nScanlineSize = pWriteAcc->GetScanlineSize();
+ for (tools::Long nX = 0; nX < nScanlineSize; ++nX)
+ pDst[nX] = ~pSrc[nX];
+ }
+ }
+ else if (use8BitMask && pWriteAcc->GetBitCount() == 8
+ && pReadAcc->GetScanlineFormat() == ScanlineFormat::N8BitPal)
+ {
+ // optimized for 8Bit source palette
+ const sal_uInt8 cTest = aTest.GetIndex();
+
+ for (tools::Long nY = 0; nY < nHeight; ++nY)
+ {
+ Scanline pSrc = pReadAcc->GetScanline(nY);
+ Scanline pDst = pWriteAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; ++nX)
+ {
+ if (cTest == pSrc[nX])
+ pDst[nX] = aWhite.GetIndex();
+ else
+ pDst[nX] = aBlack.GetIndex();
+ }
+ }
+ }
+ else
+ {
+ // not optimized
+ for (tools::Long nY = 0; nY < nHeight; ++nY)
+ {
+ Scanline pScanline = pWriteAcc->GetScanline(nY);
+ Scanline pScanlineRead = pReadAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; ++nX)
+ {
+ if (aTest == pReadAcc->GetPixelFromData(pScanlineRead, nX))
+ pWriteAcc->SetPixelOnData(pScanline, nX, aWhite);
+ else
+ pWriteAcc->SetPixelOnData(pScanline, nX, aBlack);
+ }
+ }
+ }
+ }
+ else
+ {
+ BitmapColor aCol;
+ tools::Long nR, nG, nB;
+ const tools::Long nMinR = MinMax<tools::Long>(rTransColor.GetRed() - nTol, 0, 255);
+ const tools::Long nMaxR = MinMax<tools::Long>(rTransColor.GetRed() + nTol, 0, 255);
+ const tools::Long nMinG = MinMax<tools::Long>(rTransColor.GetGreen() - nTol, 0, 255);
+ const tools::Long nMaxG = MinMax<tools::Long>(rTransColor.GetGreen() + nTol, 0, 255);
+ const tools::Long nMinB = MinMax<tools::Long>(rTransColor.GetBlue() - nTol, 0, 255);
+ const tools::Long nMaxB = MinMax<tools::Long>(rTransColor.GetBlue() + nTol, 0, 255);
+
+ if (pReadAcc->HasPalette())
+ {
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pWriteAcc->GetScanline(nY);
+ Scanline pScanlineRead = pReadAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; nX++)
+ {
+ aCol = pReadAcc->GetPaletteColor(
+ pReadAcc->GetIndexFromData(pScanlineRead, nX));
+ nR = aCol.GetRed();
+ nG = aCol.GetGreen();
+ nB = aCol.GetBlue();
+
+ if (nMinR <= nR && nMaxR >= nR && nMinG <= nG && nMaxG >= nG && nMinB <= nB
+ && nMaxB >= nB)
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX, aWhite);
+ }
+ else
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX, aBlack);
+ }
+ }
+ }
+ }
+ else
+ {
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pWriteAcc->GetScanline(nY);
+ Scanline pScanlineRead = pReadAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; nX++)
+ {
+ aCol = pReadAcc->GetPixelFromData(pScanlineRead, nX);
+ nR = aCol.GetRed();
+ nG = aCol.GetGreen();
+ nB = aCol.GetBlue();
+
+ if (nMinR <= nR && nMaxR >= nR && nMinG <= nG && nMaxG >= nG && nMinB <= nB
+ && nMaxB >= nB)
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX, aWhite);
+ }
+ else
+ {
+ pWriteAcc->SetPixelOnData(pScanline, nX, aBlack);
+ }
+ }
+ }
+ }
+ }
+
+ bRet = true;
+ }
+
+ pWriteAcc.reset();
+ pReadAcc.reset();
+
+ if (bRet)
+ {
+ aNewBmp.maPrefSize = maPrefSize;
+ aNewBmp.maPrefMapMode = maPrefMapMode;
+ }
+ else
+ aNewBmp = Bitmap();
+
+ return aNewBmp;
+}
+
+vcl::Region Bitmap::CreateRegion(const Color& rColor, const tools::Rectangle& rRect) const
+{
+ vcl::Region aRegion;
+ tools::Rectangle aRect(rRect);
+ ScopedReadAccess pReadAcc(const_cast<Bitmap&>(*this));
+
+ aRect.Intersection(tools::Rectangle(Point(), GetSizePixel()));
+ aRect.Justify();
+
+ if (pReadAcc)
+ {
+ const tools::Long nLeft = aRect.Left();
+ const tools::Long nTop = aRect.Top();
+ const tools::Long nRight = aRect.Right();
+ const tools::Long nBottom = aRect.Bottom();
+ const BitmapColor aMatch(pReadAcc->GetBestMatchingColor(rColor));
+
+ std::vector<tools::Long> aLine;
+ tools::Long nYStart(nTop);
+ tools::Long nY(nTop);
+
+ for (; nY <= nBottom; nY++)
+ {
+ std::vector<tools::Long> aNewLine;
+ tools::Long nX(nLeft);
+ Scanline pScanlineRead = pReadAcc->GetScanline(nY);
+
+ for (; nX <= nRight;)
+ {
+ while ((nX <= nRight) && (aMatch != pReadAcc->GetPixelFromData(pScanlineRead, nX)))
+ nX++;
+
+ if (nX <= nRight)
+ {
+ aNewLine.push_back(nX);
+
+ while ((nX <= nRight)
+ && (aMatch == pReadAcc->GetPixelFromData(pScanlineRead, nX)))
+ {
+ nX++;
+ }
+
+ aNewLine.push_back(nX - 1);
+ }
+ }
+
+ if (aNewLine != aLine)
+ {
+ // need to write aLine, it's different from the next line
+ if (!aLine.empty())
+ {
+ tools::Rectangle aSubRect;
+
+ // enter y values and proceed ystart
+ aSubRect.SetTop(nYStart);
+ aSubRect.SetBottom(nY ? nY - 1 : 0);
+
+ for (size_t a(0); a < aLine.size();)
+ {
+ aSubRect.SetLeft(aLine[a++]);
+ aSubRect.SetRight(aLine[a++]);
+ aRegion.Union(aSubRect);
+ }
+ }
+
+ // copy line as new line
+ aLine = aNewLine;
+ nYStart = nY;
+ }
+ }
+
+ // write last line if used
+ if (!aLine.empty())
+ {
+ tools::Rectangle aSubRect;
+
+ // enter y values
+ aSubRect.SetTop(nYStart);
+ aSubRect.SetBottom(nY ? nY - 1 : 0);
+
+ for (size_t a(0); a < aLine.size();)
+ {
+ aSubRect.SetLeft(aLine[a++]);
+ aSubRect.SetRight(aLine[a++]);
+ aRegion.Union(aSubRect);
+ }
+ }
+
+ pReadAcc.reset();
+ }
+ else
+ {
+ aRegion = aRect;
+ }
+
+ return aRegion;
+}
+
+bool Bitmap::Replace(const Bitmap& rMask, const Color& rReplaceColor)
+{
+ ScopedReadAccess pMaskAcc(const_cast<Bitmap&>(rMask));
+ BitmapScopedWriteAccess pAcc(*this);
+ bool bRet = false;
+
+ if (pMaskAcc && pAcc)
+ {
+ const tools::Long nWidth = std::min(pMaskAcc->Width(), pAcc->Width());
+ const tools::Long nHeight = std::min(pMaskAcc->Height(), pAcc->Height());
+ const BitmapColor aMaskWhite(pMaskAcc->GetBestMatchingColor(COL_WHITE));
+ BitmapColor aReplace;
+
+ if (pAcc->HasPalette())
+ {
+ const sal_uInt16 nActColors = pAcc->GetPaletteEntryCount();
+ const sal_uInt16 nMaxColors = 1 << pAcc->GetBitCount();
+
+ // default to the nearest color
+ aReplace = pAcc->GetBestMatchingColor(rReplaceColor);
+
+ // for paletted images without a matching palette entry
+ // look for an unused palette entry (NOTE: expensive!)
+ if (pAcc->GetPaletteColor(aReplace.GetIndex()) != BitmapColor(rReplaceColor))
+ {
+ // if the palette has empty entries use the last one
+ if (nActColors < nMaxColors)
+ {
+ pAcc->SetPaletteEntryCount(nActColors + 1);
+ pAcc->SetPaletteColor(nActColors, rReplaceColor);
+ aReplace = BitmapColor(static_cast<sal_uInt8>(nActColors));
+ }
+ else
+ {
+ std::unique_ptr<bool[]> pFlags(new bool[nMaxColors]);
+
+ // Set all entries to false
+ std::fill(pFlags.get(), pFlags.get() + nMaxColors, false);
+
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; nX++)
+ pFlags[pAcc->GetIndexFromData(pScanline, nX)] = true;
+ }
+
+ for (sal_uInt16 i = 0; i < nMaxColors; i++)
+ {
+ // Hurray, we do have an unused entry
+ if (!pFlags[i])
+ {
+ pAcc->SetPaletteColor(i, rReplaceColor);
+ aReplace = BitmapColor(static_cast<sal_uInt8>(i));
+ }
+ }
+ }
+ }
+ }
+ else
+ aReplace = rReplaceColor;
+
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ Scanline pScanlineMask = pMaskAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; nX++)
+ {
+ if (pMaskAcc->GetPixelFromData(pScanlineMask, nX) == aMaskWhite)
+ pAcc->SetPixelOnData(pScanline, nX, aReplace);
+ }
+ }
+
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+bool Bitmap::Replace(const AlphaMask& rAlpha, const Color& rMergeColor)
+{
+ Bitmap aNewBmp(GetSizePixel(), vcl::PixelFormat::N24_BPP);
+ ScopedReadAccess pAcc(*this);
+ AlphaMask::ScopedReadAccess pAlphaAcc(const_cast<AlphaMask&>(rAlpha));
+ BitmapScopedWriteAccess pNewAcc(aNewBmp);
+ bool bRet = false;
+
+ if (pAcc && pAlphaAcc && pNewAcc)
+ {
+ BitmapColor aCol;
+ const tools::Long nWidth = std::min(pAlphaAcc->Width(), pAcc->Width());
+ const tools::Long nHeight = std::min(pAlphaAcc->Height(), pAcc->Height());
+
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pNewAcc->GetScanline(nY);
+ Scanline pScanlineAlpha = pAlphaAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; nX++)
+ {
+ aCol = pAcc->GetColor(nY, nX);
+ aCol.Merge(rMergeColor, 255 - pAlphaAcc->GetIndexFromData(pScanlineAlpha, nX));
+ pNewAcc->SetPixelOnData(pScanline, nX, aCol);
+ }
+ }
+
+ bRet = true;
+ }
+
+ pAcc.reset();
+ pAlphaAcc.reset();
+ pNewAcc.reset();
+
+ if (bRet)
+ {
+ const MapMode aMap(maPrefMapMode);
+ const Size aSize(maPrefSize);
+
+ *this = aNewBmp;
+
+ maPrefMapMode = aMap;
+ maPrefSize = aSize;
+ }
+
+ return bRet;
+}
+
+bool Bitmap::Replace(const Color& rSearchColor, const Color& rReplaceColor, sal_uInt8 nTol)
+{
+ if (mxSalBmp)
+ {
+ // implementation specific replace
+ std::shared_ptr<SalBitmap> xImpBmp(ImplGetSVData()->mpDefInst->CreateSalBitmap());
+ if (xImpBmp->Create(*mxSalBmp) && xImpBmp->Replace(rSearchColor, rReplaceColor, nTol))
+ {
+ ImplSetSalBitmap(xImpBmp);
+ maPrefMapMode = MapMode(MapUnit::MapPixel);
+ maPrefSize = xImpBmp->GetSize();
+ return true;
+ }
+ }
+
+ // Bitmaps with 1 bit color depth can cause problems if they have other entries than black/white
+ // in their palette
+ if (getPixelFormat() == vcl::PixelFormat::N1_BPP)
+ Convert(BmpConversion::N8BitColors);
+
+ BitmapScopedWriteAccess pAcc(*this);
+ bool bRet = false;
+
+ if (pAcc)
+ {
+ const tools::Long nMinR = MinMax<tools::Long>(rSearchColor.GetRed() - nTol, 0, 255);
+ const tools::Long nMaxR = MinMax<tools::Long>(rSearchColor.GetRed() + nTol, 0, 255);
+ const tools::Long nMinG = MinMax<tools::Long>(rSearchColor.GetGreen() - nTol, 0, 255);
+ const tools::Long nMaxG = MinMax<tools::Long>(rSearchColor.GetGreen() + nTol, 0, 255);
+ const tools::Long nMinB = MinMax<tools::Long>(rSearchColor.GetBlue() - nTol, 0, 255);
+ const tools::Long nMaxB = MinMax<tools::Long>(rSearchColor.GetBlue() + nTol, 0, 255);
+
+ if (pAcc->HasPalette())
+ {
+ for (sal_uInt16 i = 0, nPalCount = pAcc->GetPaletteEntryCount(); i < nPalCount; i++)
+ {
+ const BitmapColor& rCol = pAcc->GetPaletteColor(i);
+
+ if (nMinR <= rCol.GetRed() && nMaxR >= rCol.GetRed() && nMinG <= rCol.GetGreen()
+ && nMaxG >= rCol.GetGreen() && nMinB <= rCol.GetBlue()
+ && nMaxB >= rCol.GetBlue())
+ {
+ pAcc->SetPaletteColor(i, rReplaceColor);
+ }
+ }
+ }
+ else
+ {
+ BitmapColor aCol;
+ const BitmapColor aReplace(pAcc->GetBestMatchingColor(rReplaceColor));
+
+ for (tools::Long nY = 0, nHeight = pAcc->Height(); nY < nHeight; nY++)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ for (tools::Long nX = 0, nWidth = pAcc->Width(); nX < nWidth; nX++)
+ {
+ aCol = pAcc->GetPixelFromData(pScanline, nX);
+
+ if (nMinR <= aCol.GetRed() && nMaxR >= aCol.GetRed() && nMinG <= aCol.GetGreen()
+ && nMaxG >= aCol.GetGreen() && nMinB <= aCol.GetBlue()
+ && nMaxB >= aCol.GetBlue())
+ {
+ pAcc->SetPixelOnData(pScanline, nX, aReplace);
+ }
+ }
+ }
+ }
+
+ pAcc.reset();
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+bool Bitmap::Replace(const Color* pSearchColors, const Color* pReplaceColors, size_t nColorCount,
+ sal_uInt8 const* pTols)
+{
+ // Bitmaps with 1 bit color depth can cause problems if they have other entries than black/white
+ // in their palette
+ if (getPixelFormat() == vcl::PixelFormat::N1_BPP)
+ Convert(BmpConversion::N8BitColors);
+
+ BitmapScopedWriteAccess pAcc(*this);
+ bool bRet = false;
+
+ if (pAcc)
+ {
+ std::vector<sal_uInt8> aMinR(nColorCount);
+ std::vector<sal_uInt8> aMaxR(nColorCount);
+ std::vector<sal_uInt8> aMinG(nColorCount);
+ std::vector<sal_uInt8> aMaxG(nColorCount);
+ std::vector<sal_uInt8> aMinB(nColorCount);
+ std::vector<sal_uInt8> aMaxB(nColorCount);
+
+ if (pTols)
+ {
+ for (size_t i = 0; i < nColorCount; ++i)
+ {
+ const Color& rCol = pSearchColors[i];
+ const sal_uInt8 nTol = pTols[i];
+
+ aMinR[i] = std::clamp(rCol.GetRed() - nTol, 0, 255);
+ aMaxR[i] = std::clamp(rCol.GetRed() + nTol, 0, 255);
+ aMinG[i] = std::clamp(rCol.GetGreen() - nTol, 0, 255);
+ aMaxG[i] = std::clamp(rCol.GetGreen() + nTol, 0, 255);
+ aMinB[i] = std::clamp(rCol.GetBlue() - nTol, 0, 255);
+ aMaxB[i] = std::clamp(rCol.GetBlue() + nTol, 0, 255);
+ }
+ }
+ else
+ {
+ for (size_t i = 0; i < nColorCount; ++i)
+ {
+ const Color& rCol = pSearchColors[i];
+
+ aMinR[i] = rCol.GetRed();
+ aMaxR[i] = rCol.GetRed();
+ aMinG[i] = rCol.GetGreen();
+ aMaxG[i] = rCol.GetGreen();
+ aMinB[i] = rCol.GetBlue();
+ aMaxB[i] = rCol.GetBlue();
+ }
+ }
+
+ if (pAcc->HasPalette())
+ {
+ for (sal_uInt16 nEntry = 0, nPalCount = pAcc->GetPaletteEntryCount();
+ nEntry < nPalCount; nEntry++)
+ {
+ const BitmapColor& rCol = pAcc->GetPaletteColor(nEntry);
+
+ for (size_t i = 0; i < nColorCount; ++i)
+ {
+ if (aMinR[i] <= rCol.GetRed() && aMaxR[i] >= rCol.GetRed()
+ && aMinG[i] <= rCol.GetGreen() && aMaxG[i] >= rCol.GetGreen()
+ && aMinB[i] <= rCol.GetBlue() && aMaxB[i] >= rCol.GetBlue())
+ {
+ pAcc->SetPaletteColor(nEntry, pReplaceColors[i]);
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ std::vector<BitmapColor> aReplaces(nColorCount);
+
+ for (size_t i = 0; i < nColorCount; ++i)
+ aReplaces[i] = pAcc->GetBestMatchingColor(pReplaceColors[i]);
+
+ for (tools::Long nY = 0, nHeight = pAcc->Height(); nY < nHeight; nY++)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ for (tools::Long nX = 0, nWidth = pAcc->Width(); nX < nWidth; nX++)
+ {
+ BitmapColor aCol = pAcc->GetPixelFromData(pScanline, nX);
+
+ for (size_t i = 0; i < nColorCount; ++i)
+ {
+ if (aMinR[i] <= aCol.GetRed() && aMaxR[i] >= aCol.GetRed()
+ && aMinG[i] <= aCol.GetGreen() && aMaxG[i] >= aCol.GetGreen()
+ && aMinB[i] <= aCol.GetBlue() && aMaxB[i] >= aCol.GetBlue())
+ {
+ pAcc->SetPixelOnData(pScanline, nX, aReplaces[i]);
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ pAcc.reset();
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+bool Bitmap::CombineOr(const Bitmap& rMask)
+{
+ ScopedReadAccess pMaskAcc(const_cast<Bitmap&>(rMask));
+ BitmapScopedWriteAccess pAcc(*this);
+ bool bRet = false;
+
+ if (pMaskAcc && pAcc)
+ {
+ const tools::Long nWidth = std::min(pMaskAcc->Width(), pAcc->Width());
+ const tools::Long nHeight = std::min(pMaskAcc->Height(), pAcc->Height());
+ const Color aColBlack(COL_BLACK);
+ const BitmapColor aWhite(pAcc->GetBestMatchingColor(COL_WHITE));
+ const BitmapColor aBlack(pAcc->GetBestMatchingColor(aColBlack));
+ const BitmapColor aMaskBlack(pMaskAcc->GetBestMatchingColor(aColBlack));
+
+ for (tools::Long nY = 0; nY < nHeight; nY++)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ Scanline pScanlineMask = pMaskAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; nX++)
+ {
+ if (pMaskAcc->GetPixelFromData(pScanlineMask, nX) != aMaskBlack
+ || pAcc->GetPixelFromData(pScanline, nX) != aBlack)
+ {
+ pAcc->SetPixelOnData(pScanline, nX, aWhite);
+ }
+ else
+ {
+ pAcc->SetPixelOnData(pScanline, nX, aBlack);
+ }
+ }
+ }
+
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+// TODO: Have a look at OutputDevice::ImplDrawAlpha() for some
+// optimizations. Might even consolidate the code here and there.
+bool Bitmap::Blend(const AlphaMask& rAlpha, const Color& rBackgroundColor)
+{
+ // Convert to a truecolor bitmap, if we're a paletted one. There's room for tradeoff decision here,
+ // maybe later for an overload (or a flag)
+ if (vcl::isPalettePixelFormat(getPixelFormat()))
+ Convert(BmpConversion::N24Bit);
+
+ AlphaMask::ScopedReadAccess pAlphaAcc(const_cast<AlphaMask&>(rAlpha));
+
+ BitmapScopedWriteAccess pAcc(*this);
+ bool bRet = false;
+
+ if (pAlphaAcc && pAcc)
+ {
+ const tools::Long nWidth = std::min(pAlphaAcc->Width(), pAcc->Width());
+ const tools::Long nHeight = std::min(pAlphaAcc->Height(), pAcc->Height());
+
+ for (tools::Long nY = 0; nY < nHeight; ++nY)
+ {
+ Scanline pScanline = pAcc->GetScanline(nY);
+ Scanline pScanlineAlpha = pAlphaAcc->GetScanline(nY);
+ for (tools::Long nX = 0; nX < nWidth; ++nX)
+ {
+ BitmapColor aBmpColor = pAcc->GetPixelFromData(pScanline, nX);
+ aBmpColor.Merge(rBackgroundColor,
+ 255 - pAlphaAcc->GetIndexFromData(pScanlineAlpha, nX));
+ pAcc->SetPixelOnData(pScanline, nX, aBmpColor);
+ }
+ }
+
+ bRet = true;
+ }
+
+ return bRet;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 05:30:26 +0000