include/oox/drawingml/color.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef OOX_DRAWINGML_COLOR_HXX
  21 #define OOX_DRAWINGML_COLOR_HXX
  22
  23 #include <vector>
  24 #include <boost/shared_ptr.hpp>
  25 #include <sal/types.h>
  26 #include <rtl/instance.hxx>
  27 #include <rtl/ustring.hxx>
  28 #include "oox/helper/helper.hxx"
  29 #include "oox/dllapi.h"
  30
  31 namespace oox { class GraphicHelper; }
  32
  33 namespace oox {
  34 namespace drawingml {
  35
  36 // ============================================================================
  37
  38 class OOX_DLLPUBLIC Color
  39 {
  40 public:
  41                         Color();
  42                         ~Color();
  43
  44     /** Returns the RGB value for the passed DrawingML color token, or nDefaultRgb on error. */
  45     static sal_Int32    getDmlPresetColor( sal_Int32 nToken, sal_Int32 nDefaultRgb );
  46     /** Returns the RGB value for the passed VML color token, or nDefaultRgb on error. */
  47     static sal_Int32    getVmlPresetColor( sal_Int32 nToken, sal_Int32 nDefaultRgb );
  48
  49     /** Sets the color to unused state. */
  50     void                setUnused();
  51     /** Sets an RGB value (hexadecimal RRGGBB) from the a:srgbClr element. */
  52     void                setSrgbClr( sal_Int32 nRgb );
  53     /** Sets the percentual RGB values from the a:scrgbClr element. */
  54     void                setScrgbClr( sal_Int32 nR, sal_Int32 nG, sal_Int32 nB );
  55     /** Sets the HSL values from the a:hslClr element. */
  56     void                setHslClr( sal_Int32 nHue, sal_Int32 nSat, sal_Int32 nLum );
  57     /** Sets a predefined color from the a:prstClr element. */
  58     void                setPrstClr( sal_Int32 nToken );
  59     /** Sets a scheme color from the a:schemeClr element. */
  60     void                setSchemeClr( sal_Int32 nToken );
  61     /** Sets a system color from the a:sysClr element. */
  62     void                setSysClr( sal_Int32 nToken, sal_Int32 nLastRgb );
  63     /** Sets a palette color index. */
  64     void                setPaletteClr( sal_Int32 nPaletteIdx );
  65
  66     /** Inserts the passed color transformation. */
  67     void                addTransformation( sal_Int32 nElement, sal_Int32 nValue = -1 );
  68     /** Inserts Chart specific color tint (-1.0...0.0 = shade, 0.0...1.0 = tint). */
  69     void                addChartTintTransformation( double fTint );
  70     /** Inserts Excel specific color tint (-1.0...0.0 = shade, 0.0...1.0 = tint). */
  71     void                addExcelTintTransformation( double fTint );
  72     /** Removes all color transformations. */
  73     void                clearTransformations();
  74     /** Removes transparence from the color. */
  75     void                clearTransparence();
  76
  77     /** Overwrites this color with the passed color, if it is used. */
  78     inline void         assignIfUsed( const Color& rColor ) { if( rColor.isUsed() ) *this = rColor; }
  79
  80     /** Returns true, if the color is initialized. */
  81     bool                isUsed() const { return meMode != COLOR_UNUSED; }
  82     /** Returns true, if the color is a placeholder color in theme style lists. */
  83     bool                isPlaceHolder() const { return meMode == COLOR_PH; }
  84     /** Returns the final RGB color value.
  85         @param nPhClr  Actual color for the phClr placeholder color used in theme style lists. */
  86     sal_Int32           getColor( const GraphicHelper& rGraphicHelper, sal_Int32 nPhClr = API_RGB_TRANSPARENT ) const;
  87
  88     /** Returns true, if the color is transparent. */
  89     bool                hasTransparency() const;
  90     /** Returns the transparency of the color (0 = opaque, 100 = full transparent). */
  91     sal_Int16           getTransparency() const;
  92
  93 private:
  94     /** Internal helper for getColor(). */
  95     void                setResolvedRgb( sal_Int32 nRgb ) const;
  96
  97     /** Converts the color components to RGB values. */
  98     void                toRgb() const;
  99     /** Converts the color components to CRGB values (gamma corrected percentage). */
 100     void                toCrgb() const;
 101     /** Converts the color components to HSL values. */
 102     void                toHsl() const;
 103
 104 private:
 105     enum ColorMode
 106     {
 107         COLOR_UNUSED,       /// Color is not used, or undefined.
 108         COLOR_RGB,          /// Absolute RGB (r/g/b: 0...255).
 109         COLOR_CRGB,         /// Relative RGB (r/g/b: 0...100000).
 110         COLOR_HSL,          /// HSL (hue: 0...21600000, sat/lum: 0...100000).
 111         COLOR_SCHEME,       /// Color from scheme.
 112         COLOR_PALETTE,      /// Color from application defined palette.
 113         COLOR_SYSTEM,       /// Color from system palette.
 114         COLOR_PH,           /// Placeholder color in theme style lists.
 115         COLOR_FINAL         /// Finalized RGB color.
 116     };
 117
 118     struct Transformation
 119     {
 120         sal_Int32           mnToken;
 121         sal_Int32           mnValue;
 122
 123         explicit            Transformation( sal_Int32 nToken, sal_Int32 nValue ) : mnToken( nToken ), mnValue( nValue ) {}
 124     };
 125     typedef ::std::vector< Transformation > TransformVec;
 126
 127     mutable ColorMode   meMode;         /// Current color mode.
 128     mutable TransformVec maTransforms;  /// Color transformations.
 129     mutable sal_Int32   mnC1;           /// Red, red%, hue, scheme token, palette index, system token, or final RGB.
 130     mutable sal_Int32   mnC2;           /// Green, green%, saturation, or system default RGB.
 131     mutable sal_Int32   mnC3;           /// Blue, blue%, or luminance.
 132     sal_Int32           mnAlpha;        /// Alpha value (color opacity).
 133 };
 134
 135 typedef boost::shared_ptr< Color > ColorPtr;
 136
 137 // ============================================================================
 138
 139 } // namespace drawingml
 140 } // namespace oox
 141
 142 #endif
 143
 144 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */