/* -*- 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 #include #include #include #include #include #include BitmapEx BitmapConvolutionMatrixFilter::execute(BitmapEx const& rBitmapEx) const { Bitmap aBitmap(rBitmapEx.GetBitmap()); const long nDivisor = 8; Bitmap::ScopedReadAccess pReadAcc(aBitmap); bool bRet = false; if (pReadAcc) { Bitmap aNewBmp(aBitmap.GetSizePixel(), 24); BitmapScopedWriteAccess pWriteAcc(aNewBmp); if (pWriteAcc) { const long nWidth = pWriteAcc->Width(), nWidth2 = nWidth + 2; const long nHeight = pWriteAcc->Height(), nHeight2 = nHeight + 2; long* pColm = new long[nWidth2]; long* pRows = new long[nHeight2]; BitmapColor* pColRow1 = reinterpret_cast(new sal_uInt8[sizeof(BitmapColor) * nWidth2]); BitmapColor* pColRow2 = reinterpret_cast(new sal_uInt8[sizeof(BitmapColor) * nWidth2]); BitmapColor* pColRow3 = reinterpret_cast(new sal_uInt8[sizeof(BitmapColor) * nWidth2]); BitmapColor* pRowTmp1 = pColRow1; BitmapColor* pRowTmp2 = pColRow2; BitmapColor* pRowTmp3 = pColRow3; BitmapColor* pColor; long nY, nX, i, nSumR, nSumG, nSumB, nMatrixVal, nTmp; long(*pKoeff)[256] = new long[9][256]; long* pTmp; // create LUT of products of matrix value and possible color component values for (nY = 0; nY < 9; nY++) { for (nX = nTmp = 0, nMatrixVal = mrMatrix[nY]; nX < 256; nX++, nTmp += nMatrixVal) { pKoeff[nY][nX] = nTmp; } } // create column LUT for (i = 0; i < nWidth2; i++) { pColm[i] = (i > 0) ? (i - 1) : 0; } pColm[nWidth + 1] = pColm[nWidth]; // create row LUT for (i = 0; i < nHeight2; i++) { pRows[i] = (i > 0) ? (i - 1) : 0; } pRows[nHeight + 1] = pRows[nHeight]; // read first three rows of bitmap color for (i = 0; i < nWidth2; i++) { pColRow1[i] = pReadAcc->GetColor(pRows[0], pColm[i]); pColRow2[i] = pReadAcc->GetColor(pRows[1], pColm[i]); pColRow3[i] = pReadAcc->GetColor(pRows[2], pColm[i]); } // do convolution for (nY = 0; nY < nHeight;) { Scanline pScanline = pWriteAcc->GetScanline(nY); for (nX = 0; nX < nWidth; nX++) { // first row nSumR = (pTmp = pKoeff[0])[(pColor = pRowTmp1 + nX)->GetRed()]; nSumG = pTmp[pColor->GetGreen()]; nSumB = pTmp[pColor->GetBlue()]; nSumR += (pTmp = pKoeff[1])[(++pColor)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; nSumR += (pTmp = pKoeff[2])[(++pColor)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; // second row nSumR += (pTmp = pKoeff[3])[(pColor = pRowTmp2 + nX)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; nSumR += (pTmp = pKoeff[4])[(++pColor)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; nSumR += (pTmp = pKoeff[5])[(++pColor)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; // third row nSumR += (pTmp = pKoeff[6])[(pColor = pRowTmp3 + nX)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; nSumR += (pTmp = pKoeff[7])[(++pColor)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; nSumR += (pTmp = pKoeff[8])[(++pColor)->GetRed()]; nSumG += pTmp[pColor->GetGreen()]; nSumB += pTmp[pColor->GetBlue()]; // calculate destination color pWriteAcc->SetPixelOnData( pScanline, nX, BitmapColor(static_cast(MinMax(nSumR / nDivisor, 0, 255)), static_cast(MinMax(nSumG / nDivisor, 0, 255)), static_cast(MinMax(nSumB / nDivisor, 0, 255)))); } if (++nY < nHeight) { if (pRowTmp1 == pColRow1) { pRowTmp1 = pColRow2; pRowTmp2 = pColRow3; pRowTmp3 = pColRow1; } else if (pRowTmp1 == pColRow2) { pRowTmp1 = pColRow3; pRowTmp2 = pColRow1; pRowTmp3 = pColRow2; } else { pRowTmp1 = pColRow1; pRowTmp2 = pColRow2; pRowTmp3 = pColRow3; } for (i = 0; i < nWidth2; i++) { pRowTmp3[i] = pReadAcc->GetColor(pRows[nY + 2], pColm[i]); } } } delete[] pKoeff; delete[] reinterpret_cast(pColRow1); delete[] reinterpret_cast(pColRow2); delete[] reinterpret_cast(pColRow3); delete[] pColm; delete[] pRows; pWriteAcc.reset(); bRet = true; } pReadAcc.reset(); if (bRet) { const MapMode aMap(aBitmap.GetPrefMapMode()); const Size aPrefSize(aBitmap.GetPrefSize()); aBitmap = aNewBmp; aBitmap.SetPrefMapMode(aMap); aBitmap.SetPrefSize(aPrefSize); } } if (bRet) return BitmapEx(aBitmap); return BitmapEx(); } static const long g_SharpenMatrix[] = { -1, -1, -1, -1, 16, -1, -1, -1, -1 }; BitmapSharpenFilter::BitmapSharpenFilter() : BitmapConvolutionMatrixFilter(g_SharpenMatrix) { } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ /mimo-7-5 LibreOffice 核心代码仓库文档基金会
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