Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 230 insertions, 0 deletions

diff --git a/vcl/inc/headless/CairoCommon.hxx b/vcl/inc/headless/CairoCommon.hxx
new file mode 100644
index 000000000..e8b1a4927
--- /dev/null
+++ b/vcl/inc/headless/CairoCommon.hxx
@@ -0,0 +1,230 @@
+/* -*- 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 <sal/config.h>
+#include <config_features.h>
+
+#include <cairo.h>
+
+#include <vcl/dllapi.h>
+#include <vcl/region.hxx>
+#include <vcl/salgtype.hxx>
+#include <vcl/BitmapBuffer.hxx>
+
+#include <com/sun/star/drawing/LineCap.hpp>
+
+#include <basegfx/utils/systemdependentdata.hxx>
+#include <basegfx/range/b2drange.hxx>
+#include <basegfx/range/b2irange.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+
+#include <unordered_map>
+
+//Using formats that match cairo's formats. For android we patch cairo,
+//which is internal in that case, to swap the rgb components so that
+//cairo then matches the OpenGL GL_RGBA format so we can use it there
+//where we don't have GL_BGRA support.
+// SVP_24BIT_FORMAT is used to store 24-bit images in 3-byte pixels to conserve memory.
+#if defined(ANDROID) && !HAVE_FEATURE_ANDROID_LOK
+#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcRgb | ScanlineFormat::TopDown)
+#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcRgba | ScanlineFormat::TopDown)
+#define SVP_CAIRO_BLUE 1
+#define SVP_CAIRO_GREEN 2
+#define SVP_CAIRO_RED 0
+#define SVP_CAIRO_ALPHA 3
+#elif defined OSL_BIGENDIAN
+#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcRgb | ScanlineFormat::TopDown)
+#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcArgb | ScanlineFormat::TopDown)
+#define SVP_CAIRO_BLUE 3
+#define SVP_CAIRO_GREEN 2
+#define SVP_CAIRO_RED 1
+#define SVP_CAIRO_ALPHA 0
+#else
+#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcBgr | ScanlineFormat::TopDown)
+#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcBgra | ScanlineFormat::TopDown)
+#define SVP_CAIRO_BLUE 0
+#define SVP_CAIRO_GREEN 1
+#define SVP_CAIRO_RED 2
+#define SVP_CAIRO_ALPHA 3
+#endif
+
+typedef struct _cairo cairo_t;
+typedef struct _cairo_surface cairo_surface_t;
+typedef struct _cairo_user_data_key cairo_user_data_key_t;
+
+VCL_DLLPUBLIC void dl_cairo_surface_set_device_scale(cairo_surface_t* surface, double x_scale,
+                                                     double y_scale);
+VCL_DLLPUBLIC void dl_cairo_surface_get_device_scale(cairo_surface_t* surface, double* x_scale,
+                                                     double* y_scale);
+
+VCL_DLLPUBLIC basegfx::B2DRange getFillDamage(cairo_t* cr);
+VCL_DLLPUBLIC basegfx::B2DRange getClipBox(cairo_t* cr);
+VCL_DLLPUBLIC basegfx::B2DRange getClippedFillDamage(cairo_t* cr);
+VCL_DLLPUBLIC basegfx::B2DRange getClippedStrokeDamage(cairo_t* cr);
+VCL_DLLPUBLIC basegfx::B2DRange getStrokeDamage(cairo_t* cr);
+
+class SystemDependentData_CairoPath : public basegfx::SystemDependentData
+{
+private:
+    // the path data itself
+    cairo_path_t* mpCairoPath;
+
+    // all other values the path data  is based on and
+    // need to be compared with to check for data validity
+    bool mbNoJoin;
+    bool mbAntiAlias;
+    std::vector<double> maStroke;
+
+public:
+    SystemDependentData_CairoPath(basegfx::SystemDependentDataManager& rSystemDependentDataManager,
+                                  size_t nSizeMeasure, cairo_t* cr, bool bNoJoin, bool bAntiAlias,
+                                  const std::vector<double>* pStroke); // MM01
+    virtual ~SystemDependentData_CairoPath() override;
+
+    // read access
+    cairo_path_t* getCairoPath() { return mpCairoPath; }
+    bool getNoJoin() const { return mbNoJoin; }
+    bool getAntiAlias() const { return mbAntiAlias; }
+    const std::vector<double>& getStroke() const { return maStroke; }
+
+    virtual sal_Int64 estimateUsageInBytes() const override;
+};
+
+VCL_DLLPUBLIC size_t AddPolygonToPath(cairo_t* cr, const basegfx::B2DPolygon& rPolygon,
+                                      const basegfx::B2DHomMatrix& rObjectToDevice, bool bPixelSnap,
+                                      bool bPixelSnapHairline);
+
+VCL_DLLPUBLIC basegfx::B2DPoint impPixelSnap(const basegfx::B2DPolygon& rPolygon,
+                                             const basegfx::B2DHomMatrix& rObjectToDevice,
+                                             basegfx::B2DHomMatrix& rObjectToDeviceInv,
+                                             sal_uInt32 nIndex);
+
+VCL_DLLPUBLIC void add_polygon_path(cairo_t* cr, const basegfx::B2DPolyPolygon& rPolyPolygon,
+                                    const basegfx::B2DHomMatrix& rObjectToDevice, bool bPixelSnap);
+
+VCL_DLLPUBLIC cairo_format_t getCairoFormat(const BitmapBuffer& rBuffer);
+
+VCL_DLLPUBLIC std::unique_ptr<BitmapBuffer>
+FastConvert24BitRgbTo32BitCairo(const BitmapBuffer* pSrc);
+
+VCL_DLLPUBLIC void Toggle1BitTransparency(const BitmapBuffer& rBuf);
+
+enum class PaintMode
+{
+    Over,
+    Xor
+};
+
+typedef void (*damageHandler)(void* handle, sal_Int32 nExtentsX, sal_Int32 nExtentsY,
+                              sal_Int32 nExtentsWidth, sal_Int32 nExtentsHeight);
+
+struct VCL_DLLPUBLIC DamageHandler
+{
+    void* handle;
+    damageHandler damaged;
+};
+
+struct VCL_DLLPUBLIC CairoCommon
+{
+    cairo_surface_t* m_pSurface;
+    basegfx::B2IVector m_aFrameSize;
+    vcl::Region m_aClipRegion;
+    Color m_aLineColor;
+    Color m_aFillColor;
+    PaintMode m_ePaintMode;
+    double m_fScale;
+
+    CairoCommon()
+        : m_pSurface(nullptr)
+        , m_aLineColor(Color(0x00, 0x00, 0x00))
+        , m_aFillColor(Color(0xFF, 0xFF, 0XFF))
+        , m_ePaintMode(PaintMode::Over)
+        , m_fScale(1.0)
+    {
+    }
+
+    static cairo_user_data_key_t* getDamageKey();
+
+    cairo_surface_t* getSurface() const { return m_pSurface; }
+
+    cairo_t* getCairoContext(bool bXorModeAllowed, bool bAntiAlias) const;
+    void releaseCairoContext(cairo_t* cr, bool bXorModeAllowed,
+                             const basegfx::B2DRange& rExtents) const;
+    cairo_t* createTmpCompatibleCairoContext() const;
+
+    void applyColor(cairo_t* cr, Color rColor, double fTransparency = 0.0);
+    void clipRegion(cairo_t* cr);
+    static void clipRegion(cairo_t* cr, const vcl::Region& rClipRegion);
+
+    // need this static version of ::drawPolyLine for usage from
+    // vcl/unx/generic/gdi/salgdi.cxx. It gets wrapped by
+    // ::drawPolyLine with some added parameters (see there)
+    static bool drawPolyLine(cairo_t* cr, basegfx::B2DRange* pExtents, const Color& rLineColor,
+                             bool bAntiAlias, const basegfx::B2DHomMatrix& rObjectToDevice,
+                             const basegfx::B2DPolygon& rPolyLine, double fTransparency,
+                             double fLineWidth, const std::vector<double>* pStroke,
+                             basegfx::B2DLineJoin eLineJoin, css::drawing::LineCap eLineCap,
+                             double fMiterMinimumAngle, bool bPixelSnapHairline);
+
+    void copyWithOperator(const SalTwoRect& rTR, cairo_surface_t* source, cairo_operator_t eOp,
+                          bool bAntiAlias);
+
+    void copySource(const SalTwoRect& rTR, cairo_surface_t* source, bool bAntiAlias);
+
+    static basegfx::B2DRange renderSource(cairo_t* cr, const SalTwoRect& rTR,
+                                          cairo_surface_t* source);
+
+    void copyBitsCairo(const SalTwoRect& rTR, cairo_surface_t* pSourceSurface, bool bAntiAlias);
+
+    void invert(const basegfx::B2DPolygon& rPoly, SalInvert nFlags, bool bAntiAlias);
+
+    static cairo_surface_t* createCairoSurface(const BitmapBuffer* pBuffer);
+};
+
+class SurfaceHelper
+{
+private:
+    cairo_surface_t* pSurface;
+    std::unordered_map<sal_uInt64, cairo_surface_t*> maDownscaled;
+
+    SurfaceHelper(const SurfaceHelper&) = delete;
+    SurfaceHelper& operator=(const SurfaceHelper&) = delete;
+
+    cairo_surface_t* implCreateOrReuseDownscale(unsigned long nTargetWidth,
+                                                unsigned long nTargetHeight);
+
+protected:
+    cairo_surface_t* implGetSurface() const { return pSurface; }
+    void implSetSurface(cairo_surface_t* pNew) { pSurface = pNew; }
+
+    bool isTrivial() const;
+
+public:
+    explicit SurfaceHelper();
+    ~SurfaceHelper();
+
+    cairo_surface_t* getSurface(unsigned long nTargetWidth = 0,
+                                unsigned long nTargetHeight = 0) const;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */