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Diffstat (limited to '')
| -rw-r--r-- | include/vcl/BitmapTools.hxx | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/include/vcl/BitmapTools.hxx b/include/vcl/BitmapTools.hxx new file mode 100644 index 000000000..36ccd707a --- /dev/null +++ b/include/vcl/BitmapTools.hxx @@ -0,0 +1,104 @@ +/* -*- 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/. + */ + +#ifndef INCLUDED_VCL_BITMAP_TOOLS_HXX +#define INCLUDED_VCL_BITMAP_TOOLS_HXX + +#include <config_cairo_canvas.h> +#include <config_wasm_strip.h> + +#include <vcl/bitmapex.hxx> +#include <vcl/ImageTree.hxx> +#if ENABLE_CAIRO_CANVAS +#include <vcl/cairo.hxx> +#endif +#include <basegfx/range/b2drectangle.hxx> +#include <array> +#include <vcl/RawBitmap.hxx> + +class SvStream; +namespace basegfx { class B2DHomMatrix; } +namespace com::sun::star::geometry { struct IntegerRectangle2D; } + +namespace vcl::bitmap { + +#if !ENABLE_WASM_STRIP_PREMULTIPLY +typedef std::array<std::array<sal_uInt8, 256>, 256> lookup_table; + +VCL_DLLPUBLIC lookup_table const & get_premultiply_table(); +VCL_DLLPUBLIC lookup_table const & get_unpremultiply_table(); +#endif + +sal_uInt8 unpremultiply(sal_uInt8 c, sal_uInt8 a); +sal_uInt8 premultiply(sal_uInt8 c, sal_uInt8 a); + +BitmapEx VCL_DLLPUBLIC loadFromName(const OUString& rFileName, const ImageLoadFlags eFlags = ImageLoadFlags::NONE); + +void loadFromSvg(SvStream& rStream, const OUString& sPath, BitmapEx& rBitmapEx, double fScaleFactor); + +/** Copy block of image data into the bitmap. + Assumes that the Bitmap has been constructed with the desired size. + + @param pData + The block of data to copy + @param nStride + The number of bytes in a scanline, must be >= (width * bitcount / 8) +*/ +BitmapEx VCL_DLLPUBLIC CreateFromData(sal_uInt8 const *pData, + sal_Int32 nWidth, sal_Int32 nHeight, sal_Int32 nStride, + vcl::PixelFormat ePixelFormat, + bool bReversColors = false, bool bReverseAlpha = false); + +BitmapEx VCL_DLLPUBLIC CreateFromData( RawBitmap && data ); + +#if ENABLE_CAIRO_CANVAS +VCL_DLLPUBLIC BitmapEx* CreateFromCairoSurface(Size size, cairo_surface_t* pSurface); +#endif + +VCL_DLLPUBLIC BitmapEx CanvasTransformBitmap( const BitmapEx& rBitmap, + const ::basegfx::B2DHomMatrix& rTransform, + ::basegfx::B2DRectangle const & rDestRect, + ::basegfx::B2DHomMatrix const & rLocalTransform ); + +VCL_DLLPUBLIC void DrawAlphaBitmapAndAlphaGradient(BitmapEx & rBitmapEx, bool bFixedTransparence, float fTransparence, AlphaMask & rNewMask); + +VCL_DLLPUBLIC void DrawAndClipBitmap(const Point& rPos, const Size& rSize, const BitmapEx& rBitmap, BitmapEx & aBmpEx, basegfx::B2DPolyPolygon const & rClipPath); + +VCL_DLLPUBLIC css::uno::Sequence< sal_Int8 > GetMaskDIB(BitmapEx const & aBmpEx); + +/** + * @param data will be filled with alpha data, if xBitmap is alpha/transparent image + * @param bHasAlpha will be set to true if resulting surface has alpha + **/ +VCL_DLLPUBLIC void CanvasCairoExtractBitmapData( BitmapEx const & rBmpEx, Bitmap & rBitmap, unsigned char*& data, bool& bHasAlpha, tools::Long& rnWidth, tools::Long& rnHeight ); + +VCL_DLLPUBLIC css::uno::Sequence< sal_Int8 > CanvasExtractBitmapData(BitmapEx const & rBitmapEx, const css::geometry::IntegerRectangle2D& rect); + +// helper to construct historical 8x8 bitmaps with two colors + +BitmapEx VCL_DLLPUBLIC createHistorical8x8FromArray(std::array<sal_uInt8,64> const & pArray, Color aColorPix, Color aColorBack); +bool VCL_DLLPUBLIC isHistorical8x8(const BitmapEx& rBitmapEx, Color& o_rBack, Color& o_rFront); + +VCL_DLLPUBLIC bool convertBitmap32To24Plus8(BitmapEx const & rInput, BitmapEx & rResult); + +/** Retrieve downsampled and cropped bitmap + + Takes destination size in twips units. + + @attention This method ignores negative rDstSz values, thus + mirroring must happen outside this method (e.g. in DrawBitmap) + */ +VCL_DLLPUBLIC Bitmap GetDownsampledBitmap(Size const& rDstSizeTwip, Point const& rSrcPt, Size const& rSrcSz, + Bitmap const& rBmp, tools::Long nMaxBmpDPIX, tools::Long nMaxBmpDPIY); + +} // end vcl::bitmap + +#endif // INCLUDED_VCL_BITMAP_TOOLS_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |