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 #if DEBUG 54 virtual bool IsParallelAccessLocked() const; 55 #endif 56 void UnlockParallelAccess(); 57 58 bool LockExclusiveAccess(); 59 virtual bool IsExclusiveAccessLocked() const; 60 void UnlockExclusiveAccess(); 61 62 // for screen shots 63 ServerBitmap* DumpToBitmap(); 64 virtual status_t ReadBitmap(ServerBitmap *bitmap, bool drawCursor, 65 BRect bounds); 66 67 // clipping for all drawing functions, passing a NULL region 68 // will remove any clipping (drawing allowed everywhere) 69 virtual void ConstrainClippingRegion(const BRegion* region); 70 71 virtual void SetDrawState(const DrawState* state, 72 int32 xOffset = 0, int32 yOffset = 0); 73 74 virtual void SetHighColor(const rgb_color& color); 75 virtual void SetLowColor(const rgb_color& color); 76 virtual void SetPenSize(float size); 77 virtual void SetStrokeMode(cap_mode lineCap, join_mode joinMode, 78 float miterLimit); 79 virtual void SetPattern(const struct pattern& pattern); 80 virtual void SetDrawingMode(drawing_mode mode); 81 virtual void SetDrawingMode(drawing_mode mode, 82 drawing_mode& oldMode); 83 virtual void SetBlendingMode(source_alpha srcAlpha, 84 alpha_function alphaFunc); 85 virtual void SetFont(const ServerFont& font); 86 virtual void SetFont(const DrawState* state); 87 88 void SuspendAutoSync(); 89 void Sync(); 90 91 // drawing functions 92 virtual void CopyRegion(/*const*/ BRegion* region, 93 int32 xOffset, int32 yOffset); 94 95 virtual void InvertRect(BRect r); 96 97 virtual void DrawBitmap(ServerBitmap* bitmap, 98 const BRect& bitmapRect, const BRect& viewRect, 99 uint32 options = 0); 100 // drawing primitives 101 virtual void DrawArc(BRect r, const float& angle, 102 const float& span, bool filled); 103 virtual void FillArc(BRect r, const float& angle, 104 const float& span, const BGradient& gradient); 105 106 virtual void DrawBezier(BPoint* pts, bool filled); 107 virtual void FillBezier(BPoint* pts, const BGradient& gradient); 108 109 virtual void DrawEllipse(BRect r, bool filled); 110 virtual void FillEllipse(BRect r, const BGradient& gradient); 111 112 virtual void DrawPolygon(BPoint* ptlist, int32 numpts, 113 BRect bounds, bool filled, bool closed); 114 virtual void FillPolygon(BPoint* ptlist, int32 numpts, 115 BRect bounds, const BGradient& gradient, 116 bool closed); 117 118 // these rgb_color versions are used internally by the server 119 virtual void StrokePoint(const BPoint& point, 120 const rgb_color& color); 121 virtual void StrokeRect(BRect rect, const rgb_color &color); 122 virtual void FillRect(BRect rect, const rgb_color &color); 123 virtual void FillRegion(BRegion& region, const rgb_color& color); 124 125 virtual void StrokeRect(BRect rect); 126 virtual void FillRect(BRect rect); 127 virtual void FillRect(BRect rect, const BGradient& gradient); 128 129 virtual void FillRegion(BRegion& region); 130 virtual void FillRegion(BRegion& region, 131 const BGradient& gradient); 132 133 virtual void DrawRoundRect(BRect rect, float xrad, 134 float yrad, bool filled); 135 virtual void FillRoundRect(BRect rect, float xrad, 136 float yrad, const BGradient& gradient); 137 138 virtual void DrawShape(const BRect& bounds, 139 int32 opcount, const uint32* oplist, 140 int32 ptcount, const BPoint* ptlist, 141 bool filled, const BPoint& viewToScreenOffset, 142 float viewScale); 143 virtual void FillShape(const BRect& bounds, 144 int32 opcount, const uint32* oplist, 145 int32 ptcount, const BPoint* ptlist, 146 const BGradient& gradient, 147 const BPoint& viewToScreenOffset, 148 float viewScale); 149 150 virtual void DrawTriangle(BPoint* points, const BRect& bounds, 151 bool filled); 152 virtual void FillTriangle(BPoint* points, const BRect& bounds, 153 const BGradient& gradient); 154 155 // these versions are used by the Decorator 156 virtual void StrokeLine(const BPoint& start, 157 const BPoint& end, const rgb_color& color); 158 159 virtual void StrokeLine(const BPoint& start, 160 const BPoint& end); 161 162 virtual void StrokeLineArray(int32 numlines, 163 const ViewLineArrayInfo* data); 164 165 // -------- text related calls 166 167 // returns the pen position behind the (virtually) drawn 168 // string 169 virtual BPoint DrawString(const char* string, int32 length, 170 const BPoint& pt, 171 escapement_delta* delta = NULL); 172 virtual BPoint DrawString(const char* string, int32 length, 173 const BPoint* offsets); 174 175 float StringWidth(const char* string, int32 length, 176 escapement_delta* delta = NULL); 177 178 // convenience function which is independent of graphics 179 // state (to be used by Decorator or ServerApp etc) 180 float StringWidth(const char* string, 181 int32 length, const ServerFont& font, 182 escapement_delta* delta = NULL); 183 184 // software rendering backend invoked by CopyRegion() for the sorted 185 // individual rects 186 virtual BRect CopyRect(BRect rect, int32 xOffset, 187 int32 yOffset) const; 188 189 private: 190 void _CopyRect(uint8* bits, uint32 width, 191 uint32 height, uint32 bytesPerRow, 192 int32 xOffset, int32 yOffset) const; 193 194 inline void _CopyToFront(const BRect& frame); 195 196 Painter* fPainter; 197 HWInterface* fGraphicsCard; 198 uint32 fAvailableHWAccleration; 199 int32 fSuspendSyncLevel; 200 bool fCopyToFront; 201 }; 202 203 #endif // DRAWING_ENGINE_H_ 204