1 /* 2 * Copyright 2001-2009, Haiku, Inc. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * DarkWyrm <bpmagic@columbus.rr.com> 7 * Gabe Yoder <gyoder@stny.rr.com> 8 * Stephan Aßmus <superstippi@gmx.de> 9 */ 10 #ifndef DRAWING_ENGINE_H_ 11 #define DRAWING_ENGINE_H_ 12 13 14 #include <Accelerant.h> 15 #include <Font.h> 16 #include <Locker.h> 17 #include <Point.h> 18 #include <Gradient.h> 19 #include <ServerProtocolStructs.h> 20 21 #include "HWInterface.h" 22 23 24 class BPoint; 25 class BRect; 26 class BRegion; 27 28 class DrawState; 29 class Painter; 30 class ServerBitmap; 31 class ServerCursor; 32 class ServerFont; 33 34 35 class DrawingEngine : public HWInterfaceListener { 36 public: 37 DrawingEngine(HWInterface* interface = NULL); 38 virtual ~DrawingEngine(); 39 40 // HWInterfaceListener interface 41 virtual void FrameBufferChanged(); 42 43 // for "changing" hardware 44 void SetHWInterface(HWInterface* interface); 45 46 virtual void SetCopyToFrontEnabled(bool enable); 47 bool CopyToFrontEnabled() const 48 { return fCopyToFront; } 49 virtual void CopyToFront(/*const*/ BRegion& region); 50 51 // locking 52 bool LockParallelAccess(); 53 bool IsParallelAccessLocked(); 54 void UnlockParallelAccess(); 55 56 bool LockExclusiveAccess(); 57 bool IsExclusiveAccessLocked(); 58 void UnlockExclusiveAccess(); 59 60 // for screen shots 61 ServerBitmap* DumpToBitmap(); 62 virtual status_t ReadBitmap(ServerBitmap *bitmap, bool drawCursor, 63 BRect bounds); 64 65 // clipping for all drawing functions, passing a NULL region 66 // will remove any clipping (drawing allowed everywhere) 67 virtual void ConstrainClippingRegion(const BRegion* region); 68 69 virtual void SetDrawState(const DrawState* state, 70 int32 xOffset = 0, int32 yOffset = 0); 71 72 virtual void SetHighColor(const rgb_color& color); 73 virtual void SetLowColor(const rgb_color& color); 74 virtual void SetPenSize(float size); 75 virtual void SetStrokeMode(cap_mode lineCap, join_mode joinMode, 76 float miterLimit); 77 virtual void SetPattern(const struct pattern& pattern); 78 virtual void SetDrawingMode(drawing_mode mode); 79 virtual void SetDrawingMode(drawing_mode mode, 80 drawing_mode& oldMode); 81 virtual void SetBlendingMode(source_alpha srcAlpha, 82 alpha_function alphaFunc); 83 virtual void SetFont(const ServerFont& font); 84 virtual void SetFont(const DrawState* state); 85 86 void SuspendAutoSync(); 87 void Sync(); 88 89 // drawing functions 90 virtual void CopyRegion(/*const*/ BRegion* region, 91 int32 xOffset, int32 yOffset); 92 93 virtual void InvertRect(BRect r); 94 95 virtual void DrawBitmap(ServerBitmap* bitmap, 96 const BRect& bitmapRect, const BRect& viewRect, 97 uint32 options = 0); 98 // drawing primitives 99 virtual void DrawArc(BRect r, const float& angle, 100 const float& span, bool filled); 101 virtual void FillArc(BRect r, const float& angle, 102 const float& span, const BGradient& gradient); 103 104 virtual void DrawBezier(BPoint* pts, bool filled); 105 virtual void FillBezier(BPoint* pts, const BGradient& gradient); 106 107 virtual void DrawEllipse(BRect r, bool filled); 108 virtual void FillEllipse(BRect r, const BGradient& gradient); 109 110 virtual void DrawPolygon(BPoint* ptlist, int32 numpts, 111 BRect bounds, bool filled, bool closed); 112 virtual void FillPolygon(BPoint* ptlist, int32 numpts, 113 BRect bounds, const BGradient& gradient, 114 bool closed); 115 116 // these rgb_color versions are used internally by the server 117 virtual void StrokePoint(const BPoint& point, 118 const rgb_color& color); 119 virtual void StrokeRect(BRect rect, const rgb_color &color); 120 virtual void FillRect(BRect rect, const rgb_color &color); 121 virtual void FillRegion(BRegion& region, const rgb_color& color); 122 123 virtual void StrokeRect(BRect rect); 124 virtual void FillRect(BRect rect); 125 virtual void FillRect(BRect rect, const BGradient& gradient); 126 127 virtual void FillRegion(BRegion& region); 128 virtual void FillRegion(BRegion& region, 129 const BGradient& gradient); 130 131 virtual void DrawRoundRect(BRect rect, float xrad, 132 float yrad, bool filled); 133 virtual void FillRoundRect(BRect rect, float xrad, 134 float yrad, const BGradient& gradient); 135 136 virtual void DrawShape(const BRect& bounds, 137 int32 opcount, const uint32* oplist, 138 int32 ptcount, const BPoint* ptlist, 139 bool filled); 140 virtual void FillShape(const BRect& bounds, 141 int32 opcount, const uint32* oplist, 142 int32 ptcount, const BPoint* ptlist, 143 const BGradient& gradient); 144 145 virtual void DrawTriangle(BPoint* points, const BRect& bounds, 146 bool filled); 147 virtual void FillTriangle(BPoint* points, const BRect& bounds, 148 const BGradient& gradient); 149 150 // these versions are used by the Decorator 151 virtual void StrokeLine(const BPoint& start, 152 const BPoint& end, const rgb_color& color); 153 154 virtual void StrokeLine(const BPoint& start, 155 const BPoint& end); 156 157 virtual void StrokeLineArray(int32 numlines, 158 const ViewLineArrayInfo* data); 159 160 // -------- text related calls 161 162 // returns the pen position behind the (virtually) drawn 163 // string 164 virtual BPoint DrawString(const char* string, int32 length, 165 const BPoint& pt, 166 escapement_delta* delta = NULL); 167 168 float StringWidth(const char* string, int32 length, 169 escapement_delta* delta = NULL); 170 171 // convenience function which is independent of graphics 172 // state (to be used by Decorator or ServerApp etc) 173 float StringWidth(const char* string, 174 int32 length, const ServerFont& font, 175 escapement_delta* delta = NULL); 176 177 // software rendering backend invoked by CopyRegion() for the sorted 178 // individual rects 179 virtual BRect CopyRect(BRect rect, int32 xOffset, 180 int32 yOffset) const; 181 182 private: 183 void _CopyRect(uint8* bits, uint32 width, 184 uint32 height, uint32 bytesPerRow, 185 int32 xOffset, int32 yOffset) const; 186 187 inline void _CopyToFront(const BRect& frame); 188 189 Painter* fPainter; 190 HWInterface* fGraphicsCard; 191 uint32 fAvailableHWAccleration; 192 int32 fSuspendSyncLevel; 193 bool fCopyToFront; 194 }; 195 196 #endif // DRAWING_ENGINE_H_ 197