1 /* 2 * Copyright 2006-2008, Haiku. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Stephan Aßmus <superstippi@gmx.de> 7 * Artur Wyszynski <harakash@gmail.com> 8 */ 9 10 #ifndef _GRADIENT_H 11 #define _GRADIENT_H 12 13 #include <Archivable.h> 14 #include <GraphicsDefs.h> 15 #include <List.h> 16 17 18 class BMessage; 19 class BRect; 20 21 22 enum gradient_type { 23 B_GRADIENT_LINEAR = 0, 24 B_GRADIENT_RADIAL, 25 B_GRADIENT_RADIAL_FOCUS, 26 B_GRADIENT_DIAMOND, 27 B_GRADIENT_CONIC, 28 B_GRADIENT_NONE 29 }; 30 31 32 struct color_step { 33 color_step(const rgb_color c, float o); 34 color_step(uint8 r, uint8 g, uint8 b, uint8 a, float o); 35 color_step(const color_step& other); 36 color_step(); 37 38 bool operator!=(const color_step& other) const; 39 40 rgb_color color; 41 float offset; 42 }; 43 44 45 class BGradient : public BArchivable { 46 public: 47 BGradient(); 48 BGradient(BMessage* archive); 49 virtual ~BGradient(); 50 51 status_t Archive(BMessage* into, bool deep = true) const; 52 53 BGradient& operator=(const BGradient& other); 54 55 bool operator==(const BGradient& other) const; 56 bool operator!=(const BGradient& other) const; 57 bool ColorStepsAreEqual(const BGradient& other) const; 58 59 void SetColors(const BGradient& other); 60 61 int32 AddColor(const rgb_color& color, float offset); 62 bool AddColor(const color_step& color, int32 index); 63 64 bool RemoveColor(int32 index); 65 66 bool SetColor(int32 index, const color_step& step); 67 bool SetColor(int32 index, const rgb_color& color); 68 bool SetOffset(int32 index, float offset); 69 70 int32 CountColors() const; 71 color_step* ColorAt(int32 index) const; 72 color_step* ColorAtFast(int32 index) const; 73 color_step* Colors() const; 74 void SortColorStepsByOffset(); 75 76 gradient_type Type() const 77 { return fType; } 78 79 void MakeEmpty(); 80 81 private: 82 friend class BGradientLinear; 83 friend class BGradientRadial; 84 friend class BGradientRadialFocus; 85 friend class BGradientDiamond; 86 friend class BGradientConic; 87 88 union { 89 struct { 90 float x1, y1, x2, y2; 91 } linear; 92 struct { 93 float cx, cy, radius; 94 } radial; 95 struct { 96 float cx, cy, fx, fy, radius; 97 } radial_focus; 98 struct { 99 float cx, cy; 100 } diamond; 101 struct { 102 float cx, cy, angle; 103 } conic; 104 } fData; 105 106 BList fColors; 107 gradient_type fType; 108 }; 109 110 #endif // _GRADIENT_H 111