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| -rw-r--r-- | include/vcl/bitmapaccess.hxx | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/include/vcl/bitmapaccess.hxx b/include/vcl/bitmapaccess.hxx new file mode 100644 index 000000000..da29fee9a --- /dev/null +++ b/include/vcl/bitmapaccess.hxx @@ -0,0 +1,285 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_VCL_BMPACC_HXX +#define INCLUDED_VCL_BMPACC_HXX + +#include <vcl/dllapi.h> +#include <vcl/bitmap.hxx> +#include <vcl/Scanline.hxx> +#include <vcl/BitmapBuffer.hxx> +#include <vcl/BitmapColor.hxx> +#include <vcl/BitmapAccessMode.hxx> + +typedef BitmapColor (*FncGetPixel)(ConstScanline pScanline, long nX, const ColorMask& rMask); +typedef void (*FncSetPixel)(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + +class VCL_DLLPUBLIC BitmapInfoAccess +{ + friend class BitmapReadAccess; + +public: + BitmapInfoAccess(Bitmap& rBitmap, BitmapAccessMode nMode = BitmapAccessMode::Info); + virtual ~BitmapInfoAccess(); + + bool operator!() const + { + return mpBuffer == nullptr; + } + + long Width() const + { + return mpBuffer ? mpBuffer->mnWidth : 0L; + } + + long Height() const + { + return mpBuffer ? mpBuffer->mnHeight : 0L; + } + + bool IsTopDown() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer && (mpBuffer->mnFormat & ScanlineFormat::TopDown); + } + + bool IsBottomUp() const + { + return !IsTopDown(); + } + + ScanlineFormat GetScanlineFormat() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer ? RemoveScanline(mpBuffer->mnFormat) : ScanlineFormat::NONE; + } + + sal_uInt32 GetScanlineSize() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer ? mpBuffer->mnScanlineSize : 0; + } + + sal_uInt16 GetBitCount() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer ? mpBuffer->mnBitCount : 0; + } + + BitmapColor GetBestMatchingColor(const BitmapColor& rBitmapColor) + { + if (HasPalette()) + return BitmapColor(static_cast<sal_uInt8>(GetBestPaletteIndex(rBitmapColor))); + else + return rBitmapColor; + } + + bool HasPalette() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer && !!mpBuffer->maPalette; + } + + const BitmapPalette& GetPalette() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer->maPalette; + } + + sal_uInt16 GetPaletteEntryCount() const + { + assert(HasPalette() && "Bitmap has no palette!"); + + return HasPalette() ? mpBuffer->maPalette.GetEntryCount() : 0; + } + + const BitmapColor& GetPaletteColor( sal_uInt16 nColor ) const + { + assert(mpBuffer && "Access is not valid!"); + assert(HasPalette() && "Bitmap has no palette!"); + + return mpBuffer->maPalette[nColor]; + } + + const BitmapColor& GetBestPaletteColor(const BitmapColor& rBitmapColor) const + { + return GetPaletteColor(GetBestPaletteIndex(rBitmapColor)); + } + + sal_uInt16 GetBestPaletteIndex(const BitmapColor& rBitmapColor) const; + + ColorMask& GetColorMask() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer->maColorMask; + } + +private: + BitmapInfoAccess(const BitmapInfoAccess&) = delete; + BitmapInfoAccess& operator=(const BitmapInfoAccess&) = delete; + +protected: + Bitmap maBitmap; + BitmapBuffer* mpBuffer; + ColorMask maColorMask; + BitmapAccessMode mnAccessMode; +}; + + +class VCL_DLLPUBLIC BitmapReadAccess : public BitmapInfoAccess +{ + friend class BitmapWriteAccess; + +public: + BitmapReadAccess(Bitmap& rBitmap, BitmapAccessMode nMode = BitmapAccessMode::Read); + virtual ~BitmapReadAccess() override; + + Scanline GetBuffer() const + { + assert(mpBuffer && "Access is not valid!"); + + return mpBuffer ? mpBuffer->mpBits : nullptr; + } + + Scanline GetScanline(long nY) const + { + assert(mpBuffer && "Access is not valid!"); + assert(nY < mpBuffer->mnHeight && "y-coordinate out of range!"); + + if (mpBuffer->mnFormat & ScanlineFormat::TopDown) + { + return mpBuffer->mpBits + (nY * mpBuffer->mnScanlineSize); + } + return mpBuffer->mpBits + ((mpBuffer->mnHeight - 1 - nY) * mpBuffer->mnScanlineSize); + } + + BitmapColor GetPixelFromData(const sal_uInt8* pData, long nX) const + { + assert(pData && "Access is not valid!"); + + return mFncGetPixel( pData, nX, maColorMask ); + } + + sal_uInt8 GetIndexFromData(const sal_uInt8* pData, long nX) const + { + return GetPixelFromData( pData, nX ).GetIndex(); + } + + void SetPixelOnData(sal_uInt8* pData, long nX, const BitmapColor& rBitmapColor) + { + assert(pData && "Access is not valid!"); + + mFncSetPixel(pData, nX, rBitmapColor, maColorMask); + } + + BitmapColor GetPixel(long nY, long nX) const + { + assert(mpBuffer && "Access is not valid!"); + assert(nX < mpBuffer->mnWidth && "x-coordinate out of range!"); + assert(nY < mpBuffer->mnHeight && "y-coordinate out of range!"); + + return mFncGetPixel(GetScanline(nY), nX, maColorMask ); + } + + BitmapColor GetColor(long nY, long nX) const + { + if (HasPalette()) + return mpBuffer->maPalette[GetPixelIndex(nY, nX)]; + else + return GetPixel(nY, nX); + } + + sal_uInt8 GetPixelIndex(long nY, long nX) const + { + return GetPixel(nY, nX).GetIndex(); + } + + /** Get the interpolated color at coordinates fY, fX; if outside, return rFallback */ + BitmapColor GetInterpolatedColorWithFallback( double fY, double fX, const BitmapColor& rFallback ) const; + + /** Get the color at coordinates fY, fX; if outside, return rFallback. Automatically does the correct + inside/outside checks, e.g. static_cast< sal_uInt32 >(-0.25) *is* 0, not -1 and has to be outside */ + BitmapColor GetColorWithFallback( double fY, double fX, const BitmapColor& rFallback ) const; + +private: + BitmapReadAccess(const BitmapReadAccess&) = delete; + BitmapReadAccess& operator=(const BitmapReadAccess&) = delete; + +protected: + FncGetPixel mFncGetPixel; + FncSetPixel mFncSetPixel; + + SAL_DLLPRIVATE bool ImplSetAccessPointers( ScanlineFormat nFormat ); + +public: + + SAL_DLLPRIVATE BitmapBuffer* ImplGetBitmapBuffer() const + { + return mpBuffer; + } + + static BitmapColor GetPixelForN1BitMsbPal(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN1BitLsbPal(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN4BitMsnPal(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN4BitLsnPal(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN8BitPal(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN8BitTcMask(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN24BitTcBgr(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN24BitTcRgb(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcAbgr(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcXbgr(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcArgb(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcXrgb(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcBgra(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcBgrx(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcRgba(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcRgbx(ConstScanline pScanline, long nX, const ColorMask& rMask); + static BitmapColor GetPixelForN32BitTcMask(ConstScanline pScanline, long nX, const ColorMask& rMask); + + static void SetPixelForN1BitMsbPal(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN1BitLsbPal(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN4BitMsnPal(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN4BitLsnPal(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN8BitPal(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN8BitTcMask(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN24BitTcBgr(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN24BitTcRgb(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcAbgr(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcXbgr(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcArgb(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcXrgb(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcBgra(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcBgrx(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcRgba(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcRgbx(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + static void SetPixelForN32BitTcMask(Scanline pScanline, long nX, const BitmapColor& rBitmapColor, const ColorMask& rMask); + +}; + + +#endif // INCLUDED_VCL_BMPACC_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |