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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 .
*/
#pragma once
#include <vcl/dllapi.h>
#include <vcl/bitmap.hxx>
#include <vcl/Scanline.hxx>
#include <vcl/BitmapBuffer.hxx>
#include <vcl/BitmapColor.hxx>
#include <vcl/BitmapAccessMode.hxx>
#include <vcl/BitmapInfoAccess.hxx>
class SAL_DLLPUBLIC_RTTI BitmapReadAccess : public BitmapInfoAccess
{
friend class BitmapWriteAccess;
public:
VCL_DLLPUBLIC BitmapReadAccess(const Bitmap& rBitmap,
BitmapAccessMode nMode = BitmapAccessMode::Read);
VCL_DLLPUBLIC BitmapReadAccess(const AlphaMask& rBitmap,
BitmapAccessMode nMode = BitmapAccessMode::Read);
VCL_DLLPUBLIC virtual ~BitmapReadAccess() override;
Scanline GetBuffer() const
{
assert(mpBuffer && "Access is not valid!");
return mpBuffer ? mpBuffer->mpBits : nullptr;
}
Scanline GetScanline(tools::Long nY) const
{
assert(mpBuffer && "Access is not valid!");
assert(nY < mpBuffer->mnHeight && "y-coordinate out of range!");
if (mpBuffer->meDirection == ScanlineDirection::TopDown)
{
return mpBuffer->mpBits + (nY * mpBuffer->mnScanlineSize);
}
return mpBuffer->mpBits + ((mpBuffer->mnHeight - 1 - nY) * mpBuffer->mnScanlineSize);
}
BitmapColor GetPixelFromData(const sal_uInt8* pData, tools::Long nX) const
{
assert(pData && "Access is not valid!");
return mFncGetPixel(pData, nX);
}
sal_uInt8 GetIndexFromData(const sal_uInt8* pData, tools::Long nX) const
{
return GetPixelFromData(pData, nX).GetIndex();
}
void SetPixelOnData(sal_uInt8* pData, tools::Long nX, const BitmapColor& rBitmapColor)
{
assert(pData && "Access is not valid!");
mFncSetPixel(pData, nX, rBitmapColor);
}
BitmapColor GetPixel(tools::Long nY, tools::Long nX) const
{
assert(mpBuffer && "Access is not valid!");
assert(nX < mpBuffer->mnWidth && "x-coordinate out of range!");
return GetPixelFromData(GetScanline(nY), nX);
}
BitmapColor GetPixel(const Point& point) const { return GetPixel(point.Y(), point.X()); }
BitmapColor GetColorFromData(const sal_uInt8* pData, tools::Long nX) const
{
if (HasPalette())
return GetPaletteColor(GetIndexFromData(pData, nX));
else
return GetPixelFromData(pData, nX);
}
BitmapColor GetColor(tools::Long nY, tools::Long nX) const
{
assert(mpBuffer && "Access is not valid!");
assert(nX < mpBuffer->mnWidth && "x-coordinate out of range!");
return GetColorFromData(GetScanline(nY), nX);
}
BitmapColor GetColor(const Point& point) const { return GetColor(point.Y(), point.X()); }
sal_uInt8 GetPixelIndex(tools::Long nY, tools::Long nX) const
{
return GetPixel(nY, nX).GetIndex();
}
sal_uInt8 GetPixelIndex(const Point& point) const
{
return GetPixelIndex(point.Y(), point.X());
}
/** 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;
public:
BitmapBuffer* ImplGetBitmapBuffer() const { return mpBuffer; }
static BitmapColor GetPixelForN8BitPal(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN24BitTcBgr(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN24BitTcRgb(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcAbgr(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcXbgr(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcArgb(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcXrgb(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcBgra(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcBgrx(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcRgba(ConstScanline pScanline, tools::Long nX);
static BitmapColor GetPixelForN32BitTcRgbx(ConstScanline pScanline, tools::Long nX);
static void SetPixelForN8BitPal(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN24BitTcBgr(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN24BitTcRgb(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcAbgr(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcXbgr(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcArgb(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcXrgb(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcBgra(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcBgrx(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcRgba(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static void SetPixelForN32BitTcRgbx(Scanline pScanline, tools::Long nX,
const BitmapColor& rBitmapColor);
static FncGetPixel GetPixelFunction(ScanlineFormat nFormat);
static FncSetPixel SetPixelFunction(ScanlineFormat nFormat);
};
class BitmapScopedReadAccess
{
public:
BitmapScopedReadAccess(const Bitmap& rBitmap)
: moAccess(rBitmap)
{
}
BitmapScopedReadAccess(const AlphaMask& rBitmap)
: moAccess(rBitmap)
{
}
BitmapScopedReadAccess() {}
BitmapScopedReadAccess& operator=(const Bitmap& rBitmap)
{
moAccess.emplace(rBitmap);
return *this;
}
BitmapScopedReadAccess& operator=(const AlphaMask& rBitmap)
{
moAccess.emplace(rBitmap);
return *this;
}
bool operator!() const { return !moAccess.has_value() || !*moAccess; }
explicit operator bool() const { return moAccess && bool(*moAccess); }
void reset() { moAccess.reset(); }
BitmapReadAccess* get() { return moAccess ? &*moAccess : nullptr; }
const BitmapReadAccess* get() const { return moAccess ? &*moAccess : nullptr; }
BitmapReadAccess* operator->() { return &*moAccess; }
const BitmapReadAccess* operator->() const { return &*moAccess; }
BitmapReadAccess& operator*() { return *moAccess; }
const BitmapReadAccess& operator*() const { return *moAccess; }
private:
std::optional<BitmapReadAccess> moAccess;
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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