1 files changed, 104 insertions, 0 deletions
diff --git a/include/vcl/BitmapTools.hxx b/include/vcl/BitmapTools.hxx
new file mode 100644
index 0000000000..f06f736e45
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+++ 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
+
+VCL_DLLPUBLIC sal_uInt8 unpremultiply(sal_uInt8 c, sal_uInt8 a);
+VCL_DLLPUBLIC 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,
+                                      sal_Int8 nBitsPerPixel,
+                                      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: */