1 /* 2 * Copyright 2001-2015, 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 * Julian Harnath <julian.harnath@rwth-aachen.de> 10 */ 11 #ifndef DRAWING_ENGINE_H_ 12 #define DRAWING_ENGINE_H_ 13 14 15 #include <Accelerant.h> 16 #include <Font.h> 17 #include <Locker.h> 18 #include <Point.h> 19 #include <Gradient.h> 20 #include <ServerProtocolStructs.h> 21 22 #include "HWInterface.h" 23 24 25 class BPoint; 26 class BRect; 27 class BRegion; 28 29 class DrawState; 30 class Painter; 31 class ServerBitmap; 32 class ServerCursor; 33 class ServerFont; 34 35 36 class DrawingEngine : public HWInterfaceListener { 37 public: 38 DrawingEngine(HWInterface* interface = NULL); 39 virtual ~DrawingEngine(); 40 41 // HWInterfaceListener interface 42 virtual void FrameBufferChanged(); 43 44 // for "changing" hardware 45 void SetHWInterface(HWInterface* interface); 46 47 virtual void SetCopyToFrontEnabled(bool enable); 48 bool CopyToFrontEnabled() const 49 { return fCopyToFront; } 50 virtual void CopyToFront(/*const*/ BRegion& region); 51 52 // locking 53 bool LockParallelAccess(); 54 #if DEBUG 55 virtual bool IsParallelAccessLocked() const; 56 #endif 57 void UnlockParallelAccess(); 58 59 bool LockExclusiveAccess(); 60 virtual bool IsExclusiveAccessLocked() const; 61 void UnlockExclusiveAccess(); 62 63 // for screen shots 64 ServerBitmap* DumpToBitmap(); 65 virtual status_t ReadBitmap(ServerBitmap *bitmap, bool drawCursor, 66 BRect bounds); 67 68 // clipping for all drawing functions, passing a NULL region 69 // will remove any clipping (drawing allowed everywhere) 70 virtual void ConstrainClippingRegion(const BRegion* region); 71 72 virtual void SetDrawState(const DrawState* state, 73 int32 xOffset = 0, int32 yOffset = 0); 74 75 virtual void SetHighColor(const rgb_color& color); 76 virtual void SetLowColor(const rgb_color& color); 77 virtual void SetPenSize(float size); 78 virtual void SetStrokeMode(cap_mode lineCap, join_mode joinMode, 79 float miterLimit); 80 virtual void SetFillRule(int32 fillRule); 81 virtual void SetPattern(const struct pattern& pattern); 82 virtual void SetDrawingMode(drawing_mode mode); 83 virtual void SetDrawingMode(drawing_mode mode, 84 drawing_mode& oldMode); 85 virtual void SetBlendingMode(source_alpha srcAlpha, 86 alpha_function alphaFunc); 87 virtual void SetFont(const ServerFont& font); 88 virtual void SetFont(const DrawState* state); 89 virtual void SetTransform(const BAffineTransform& transform); 90 91 void SuspendAutoSync(); 92 void Sync(); 93 94 // drawing functions 95 virtual void CopyRegion(/*const*/ BRegion* region, 96 int32 xOffset, int32 yOffset); 97 98 virtual void InvertRect(BRect r); 99 100 virtual void DrawBitmap(ServerBitmap* bitmap, 101 const BRect& bitmapRect, const BRect& viewRect, 102 uint32 options = 0); 103 // drawing primitives 104 virtual void DrawArc(BRect r, const float& angle, 105 const float& span, bool filled); 106 virtual void FillArc(BRect r, const float& angle, 107 const float& span, const BGradient& gradient); 108 109 virtual void DrawBezier(BPoint* pts, bool filled); 110 virtual void FillBezier(BPoint* pts, const BGradient& gradient); 111 112 virtual void DrawEllipse(BRect r, bool filled); 113 virtual void FillEllipse(BRect r, const BGradient& gradient); 114 115 virtual void DrawPolygon(BPoint* ptlist, int32 numpts, 116 BRect bounds, bool filled, bool closed); 117 virtual void FillPolygon(BPoint* ptlist, int32 numpts, 118 BRect bounds, const BGradient& gradient, 119 bool closed); 120 121 // these rgb_color versions are used internally by the server 122 virtual void StrokePoint(const BPoint& point, 123 const rgb_color& color); 124 virtual void StrokeRect(BRect rect, const rgb_color &color); 125 virtual void FillRect(BRect rect, const rgb_color &color); 126 virtual void FillRegion(BRegion& region, const rgb_color& color); 127 128 virtual void StrokeRect(BRect rect); 129 virtual void FillRect(BRect rect); 130 virtual void FillRect(BRect rect, const BGradient& gradient); 131 132 virtual void FillRegion(BRegion& region); 133 virtual void FillRegion(BRegion& region, 134 const BGradient& gradient); 135 136 virtual void DrawRoundRect(BRect rect, float xrad, 137 float yrad, bool filled); 138 virtual void FillRoundRect(BRect rect, float xrad, 139 float yrad, const BGradient& gradient); 140 141 virtual void DrawShape(const BRect& bounds, 142 int32 opcount, const uint32* oplist, 143 int32 ptcount, const BPoint* ptlist, 144 bool filled, const BPoint& viewToScreenOffset, 145 float viewScale); 146 virtual void FillShape(const BRect& bounds, 147 int32 opcount, const uint32* oplist, 148 int32 ptcount, const BPoint* ptlist, 149 const BGradient& gradient, 150 const BPoint& viewToScreenOffset, 151 float viewScale); 152 153 virtual void DrawTriangle(BPoint* points, const BRect& bounds, 154 bool filled); 155 virtual void FillTriangle(BPoint* points, const BRect& bounds, 156 const BGradient& gradient); 157 158 // these versions are used by the Decorator 159 virtual void StrokeLine(const BPoint& start, 160 const BPoint& end, const rgb_color& color); 161 162 virtual void StrokeLine(const BPoint& start, 163 const BPoint& end); 164 165 virtual void StrokeLineArray(int32 numlines, 166 const ViewLineArrayInfo* data); 167 168 // -------- text related calls 169 170 // returns the pen position behind the (virtually) drawn 171 // string 172 virtual BPoint DrawString(const char* string, int32 length, 173 const BPoint& pt, 174 escapement_delta* delta = NULL); 175 virtual BPoint DrawString(const char* string, int32 length, 176 const BPoint* offsets); 177 178 float StringWidth(const char* string, int32 length, 179 escapement_delta* delta = NULL); 180 181 // convenience function which is independent of graphics 182 // state (to be used by Decorator or ServerApp etc) 183 float StringWidth(const char* string, 184 int32 length, const ServerFont& font, 185 escapement_delta* delta = NULL); 186 187 // software rendering backend invoked by CopyRegion() for the sorted 188 // individual rects 189 virtual BRect CopyRect(BRect rect, int32 xOffset, 190 int32 yOffset) const; 191 192 void SetRendererOffset(int32 offsetX, int32 offsetY); 193 194 private: 195 void _CopyRect(uint8* bits, uint32 width, 196 uint32 height, uint32 bytesPerRow, 197 int32 xOffset, int32 yOffset) const; 198 199 inline void _CopyToFront(const BRect& frame); 200 201 Painter* fPainter; 202 HWInterface* fGraphicsCard; 203 uint32 fAvailableHWAccleration; 204 int32 fSuspendSyncLevel; 205 bool fCopyToFront; 206 }; 207 208 #endif // DRAWING_ENGINE_H_ 209