235 lines
10 KiB
C++
235 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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#pragma once
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#include <vcl/dllapi.h>
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#include <vcl/bitmap.hxx>
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#include <vcl/Scanline.hxx>
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#include <vcl/BitmapBuffer.hxx>
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#include <vcl/BitmapColor.hxx>
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#include <vcl/BitmapAccessMode.hxx>
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#include <vcl/BitmapInfoAccess.hxx>
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class SAL_DLLPUBLIC_RTTI BitmapReadAccess : public BitmapInfoAccess
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{
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friend class BitmapWriteAccess;
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public:
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VCL_DLLPUBLIC BitmapReadAccess(const Bitmap& rBitmap,
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BitmapAccessMode nMode = BitmapAccessMode::Read);
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VCL_DLLPUBLIC BitmapReadAccess(const AlphaMask& rBitmap,
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BitmapAccessMode nMode = BitmapAccessMode::Read);
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VCL_DLLPUBLIC virtual ~BitmapReadAccess() override;
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Scanline GetBuffer() const
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{
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assert(mpBuffer && "Access is not valid!");
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return mpBuffer ? mpBuffer->mpBits : nullptr;
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}
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Scanline GetScanline(tools::Long nY) const
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{
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assert(mpBuffer && "Access is not valid!");
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assert(nY < mpBuffer->mnHeight && "y-coordinate out of range!");
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if (mpBuffer->meDirection == ScanlineDirection::TopDown)
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{
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return mpBuffer->mpBits + (nY * mpBuffer->mnScanlineSize);
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}
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return mpBuffer->mpBits + ((mpBuffer->mnHeight - 1 - nY) * mpBuffer->mnScanlineSize);
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}
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BitmapColor GetPixelFromData(const sal_uInt8* pData, tools::Long nX) const
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{
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assert(pData && "Access is not valid!");
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return mFncGetPixel(pData, nX, maColorMask);
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}
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sal_uInt8 GetIndexFromData(const sal_uInt8* pData, tools::Long nX) const
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{
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return GetPixelFromData(pData, nX).GetIndex();
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}
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void SetPixelOnData(sal_uInt8* pData, tools::Long nX, const BitmapColor& rBitmapColor)
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{
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assert(pData && "Access is not valid!");
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mFncSetPixel(pData, nX, rBitmapColor, maColorMask);
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}
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BitmapColor GetPixel(tools::Long nY, tools::Long nX) const
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{
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assert(mpBuffer && "Access is not valid!");
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assert(nX < mpBuffer->mnWidth && "x-coordinate out of range!");
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return GetPixelFromData(GetScanline(nY), nX);
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}
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BitmapColor GetPixel(const Point& point) const { return GetPixel(point.Y(), point.X()); }
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BitmapColor GetColorFromData(sal_uInt8* pData, tools::Long nX) const
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{
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if (HasPalette())
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return GetPaletteColor(GetIndexFromData(pData, nX));
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else
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return GetPixelFromData(pData, nX);
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}
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BitmapColor GetColor(tools::Long nY, tools::Long nX) const
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{
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assert(mpBuffer && "Access is not valid!");
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assert(nX < mpBuffer->mnWidth && "x-coordinate out of range!");
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return GetColorFromData(GetScanline(nY), nX);
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}
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BitmapColor GetColor(const Point& point) const { return GetColor(point.Y(), point.X()); }
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sal_uInt8 GetPixelIndex(tools::Long nY, tools::Long nX) const
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{
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return GetPixel(nY, nX).GetIndex();
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}
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sal_uInt8 GetPixelIndex(const Point& point) const
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{
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return GetPixelIndex(point.Y(), point.X());
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}
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/** Get the interpolated color at coordinates fY, fX; if outside, return rFallback */
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BitmapColor GetInterpolatedColorWithFallback(double fY, double fX,
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const BitmapColor& rFallback) const;
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/** Get the color at coordinates fY, fX; if outside, return rFallback. Automatically does the correct
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inside/outside checks, e.g. static_cast< sal_uInt32 >(-0.25) *is* 0, not -1 and has to be outside */
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BitmapColor GetColorWithFallback(double fY, double fX, const BitmapColor& rFallback) const;
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private:
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BitmapReadAccess(const BitmapReadAccess&) = delete;
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BitmapReadAccess& operator=(const BitmapReadAccess&) = delete;
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protected:
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FncGetPixel mFncGetPixel;
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FncSetPixel mFncSetPixel;
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public:
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BitmapBuffer* ImplGetBitmapBuffer() const { return mpBuffer; }
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static BitmapColor GetPixelForN1BitMsbPal(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN8BitPal(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN24BitTcBgr(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN24BitTcRgb(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcAbgr(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcXbgr(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcArgb(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcXrgb(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcBgra(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcBgrx(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcRgba(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcRgbx(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static BitmapColor GetPixelForN32BitTcMask(ConstScanline pScanline, tools::Long nX,
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const ColorMask& rMask);
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static void SetPixelForN1BitMsbPal(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN8BitPal(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN24BitTcBgr(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN24BitTcRgb(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcAbgr(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcXbgr(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcArgb(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcXrgb(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcBgra(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcBgrx(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcRgba(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcRgbx(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static void SetPixelForN32BitTcMask(Scanline pScanline, tools::Long nX,
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const BitmapColor& rBitmapColor, const ColorMask& rMask);
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static FncGetPixel GetPixelFunction(ScanlineFormat nFormat);
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static FncSetPixel SetPixelFunction(ScanlineFormat nFormat);
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};
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class BitmapScopedReadAccess
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{
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public:
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BitmapScopedReadAccess(const Bitmap& rBitmap)
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: moAccess(rBitmap)
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{
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}
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BitmapScopedReadAccess(const AlphaMask& rBitmap)
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: moAccess(rBitmap)
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{
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}
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BitmapScopedReadAccess() {}
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BitmapScopedReadAccess& operator=(const Bitmap& rBitmap)
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{
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moAccess.emplace(rBitmap);
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return *this;
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}
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BitmapScopedReadAccess& operator=(const AlphaMask& rBitmap)
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{
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moAccess.emplace(rBitmap);
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return *this;
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}
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bool operator!() const { return !moAccess.has_value() || !*moAccess; }
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explicit operator bool() const { return moAccess && bool(*moAccess); }
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void reset() { moAccess.reset(); }
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BitmapReadAccess* get() { return moAccess ? &*moAccess : nullptr; }
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const BitmapReadAccess* get() const { return moAccess ? &*moAccess : nullptr; }
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BitmapReadAccess* operator->() { return &*moAccess; }
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const BitmapReadAccess* operator->() const { return &*moAccess; }
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BitmapReadAccess& operator*() { return *moAccess; }
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const BitmapReadAccess& operator*() const { return *moAccess; }
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private:
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std::optional<BitmapReadAccess> moAccess;
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};
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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