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# csplugincommon/canvas/graph2d.h

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    00001 /*
    00002     Copyright (C) 1998-2001 by Jorrit Tyberghein
    00003     Written by Andrew Zabolotny <bit@eltech.ru>
    00004
    00005     This library is free software; you can redistribute it and/or
    00006     modify it under the terms of the GNU Library General Public
    00007     License as published by the Free Software Foundation; either
    00008     version 2 of the License, or (at your option) any later version.
    00009
    00010     This library is distributed in the hope that it will be useful,
    00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00013     Library General Public License for more details.
    00014
    00015     You should have received a copy of the GNU Library General Public
    00016     License along with this library; if not, write to the Free
    00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00018 */
    00019
    00020 #ifndef __CS_CSPLUGINCOMMON_CANVAS_GRAPH2D_H__
    00021 #define __CS_CSPLUGINCOMMON_CANVAS_GRAPH2D_H__
    00022
    00027 #include "csextern.h"
    00028
    00029 #include "csutil/cfgacc.h"
    00030 #include "csutil/scf.h"
    00031 #include "csutil/scf_implementation.h"
    00032 #include "csutil/weakref.h"
    00033
    00034 #include "iutil/comp.h"
    00035 #include "iutil/dbghelp.h"
    00036 #include "iutil/eventh.h"
    00037 #include "iutil/plugin.h"
    00038 #include "iutil/pluginconfig.h"
    00039 #include "iutil/string.h"
    00040 #include "ivideo/fontserv.h"
    00041 #include "ivideo/graph2d.h"
    00042 #include "ivideo/natwin.h"
    00043
    00048 struct iObjectRegistry;
    00049 struct iPluginManager;
    00050
    00051 class csFontCache;
    00052
    00060 class CS_CRYSTALSPACE_EXPORT csGraphics2D :
    00061   public scfImplementation6<csGraphics2D,
    00062                             iGraphics2D,
    00063                             iComponent,
    00064                             iNativeWindow,
    00065                             iNativeWindowManager,
    00066                             iPluginConfig,
    00067                             iDebugHelper>
    00068 {
    00069 public:
    00071   csConfigAccess config;
    00072
    00074   int ClipX1, ClipX2, ClipY1, ClipY2;
    00075
    00077   csPixelFormat pfmt;
    00078
    00080   unsigned char *Memory;
    00081
    00083   bool is_open;
    00084
    00086   int *LineAddress;
    00087
    00089   iObjectRegistry* object_reg;
    00091   csWeakRef<iPluginManager> plugin_mgr;
    00092
    00097   csRef<iOffscreenCanvasCallback> ofscb;
    00098
    00100   csWeakRef<iFontServer> FontServer;
    00102   csFontCache* fontCache;
    00103
    00105   csString win_title;
    00106
    00108   int Width, Height, Depth;
    00109
    00110   int vpWidth, vpHeight;
    00111   bool vpSet;
    00112
    00118   int DisplayNumber;
    00120   bool FullScreen;
    00122   bool AllowResizing;
    00124   csRGBpixel *Palette;
    00126   bool PaletteAlloc[256];
    00131   int FrameBufferLocked;
    00135   virtual void ChangeDepth (int d);
    00139   virtual const char *GetName() const;
    00140
    00141 protected:
    00143   int refreshRate;
    00145   bool vsync;
    00146
    00147   void CreateDefaultFontCache ();
    00148
    00149   csString name;
    00150 private:
    00152   int FindRGBPalette (int r, int g, int b);
    00157   bool Initialize (iObjectRegistry* r, int width, int height,
    00158         int depth, void* memory, iOffscreenCanvasCallback* ofscb);
    00159
    00160 public:
    00162   csGraphics2D (iBase*);
    00163
    00165   virtual ~csGraphics2D ();
    00166
    00168   virtual bool Initialize (iObjectRegistry*);
    00170   virtual bool HandleEvent (iEvent&);
    00171
    00173   virtual bool Open ();
    00175   virtual void Close ();
    00176
    00178   virtual void SetClipRect (int xmin, int ymin, int xmax, int ymax);
    00180   virtual void GetClipRect (int &xmin, int &ymin, int &xmax, int &ymax);
    00181
    00186   virtual bool BeginDraw ();
    00188   virtual void FinishDraw ();
    00189
    00191   virtual void Print (csRect const* /*area*/ = 0) { }
    00192
    00194   virtual int GetPage ();
    00196   virtual bool DoubleBuffer (bool Enable);
    00198   virtual bool GetDoubleBufferState ();
    00199
    00201   virtual void Clear (int color);
    00203   virtual void ClearAll (int color);
    00204
    00210
    00211   void (*_DrawPixel) (csGraphics2D *This, int x, int y, int color);
    00213   virtual void DrawPixel (int x, int y, int color)
    00214   { _DrawPixel (this, x, y, color); }
    00215   virtual void DrawPixels (csPixelCoord const* pixels, int num_pixels,
    00216     int color);
    00218   virtual void Blit (int x, int y, int width, int height,
    00219         unsigned char const* data);
    00220
    00222   virtual void DrawLine (float x1, float y1, float x2, float y2, int color);
    00224   virtual void DrawBox (int x, int y, int w, int h, int color);
    00226   virtual void SetRGB (int i, int r, int g, int b);
    00227   virtual int FindRGB (int r, int g, int b, int a = 255)
    00228   {
    00229     if (r < 0) r = 0; else if (r > 255) r = 255;
    00230     if (g < 0) g = 0; else if (g > 255) g = 255;
    00231     if (b < 0) b = 0; else if (b > 255) b = 255;
    00232     if (a < 0) a = 0; else if (a > 255) a = 255;
    00233     if (Depth == 8)
    00234       return FindRGBPalette (r, g, b);
    00235     return
    00236       ((r >> (8 - pfmt.RedBits))   << pfmt.RedShift) |
    00237       ((g >> (8 - pfmt.GreenBits)) << pfmt.GreenShift) |
    00238       ((b >> (8 - pfmt.BlueBits))  << pfmt.BlueShift) |
    00239       ((255 - a) << 24);
    00240     /* Alpha is "inverted" so '-1' can be decomposed to a
    00241        transparent color. (But alpha not be inverted, '-1'
    00242        would be "opaque white". However, -1 is the color
    00243        index for "transparent text background". */
    00244   }
    00245   virtual void GetRGB (int color, int& r, int& g, int& b);
    00246   virtual void GetRGB (int color, int& r, int& g, int& b, int& a);
    00248   virtual void Write (iFont *font , int x, int y, int fg, int bg,
    00249     const char *text, uint flags = 0);
    00250   virtual void WriteBaseline (iFont *font , int x, int y, int fg, int bg,
    00251     const char *text);
    00253   unsigned char* (*_GetPixelAt) (csGraphics2D *This, int x, int y);
    00255   virtual unsigned char *GetPixelAt (int x, int y)
    00256   { return _GetPixelAt (this, x, y); }
    00257
    00265   virtual int GetPalEntryCount ()
    00266   { return pfmt.PalEntries; }
    00267
    00273   virtual int GetPixelBytes ()
    00274   { return pfmt.PixelBytes; }
    00275
    00279   virtual csPixelFormat const* GetPixelFormat ()
    00280   { return &pfmt; }
    00281
    00287   virtual csImageArea *SaveArea (int x, int y, int w, int h);
    00289   virtual void RestoreArea (csImageArea *Area, bool Free = true);
    00291   virtual void FreeArea (csImageArea *Area);
    00292
    00293   virtual bool SetGamma (float /*gamma*/) { return false; }
    00294   virtual float GetGamma () const { return 1.0; }
    00295
    00296   virtual csPtr<iGraphics2D> CreateOffscreenCanvas (
    00297         void* memory, int width, int height, int depth,
    00298         iOffscreenCanvasCallback* ofscb);
    00299
    00300 private:
    00302   bool CLIPt (float denom, float num, float& tE, float& tL);
    00303 public:
    00304
    00309   virtual bool ClipLine (float &x1, float &y1, float &x2, float &y2,
    00310     int xmin, int ymin, int xmax, int ymax);
    00311
    00313   virtual iFontServer *GetFontServer ()
    00314   { return FontServer; }
    00315
    00316   virtual int GetWidth ()
    00317   { return vpSet ? vpWidth : Width; }
    00318   virtual int GetHeight ()
    00319   { return vpSet ? vpHeight : Height; }
    00320
    00322   virtual csRGBpixel *GetPalette ()
    00323   { return pfmt.PalEntries ? Palette : 0; }
    00324
    00326   virtual void GetPixel (int x, int y, uint8 &oR, uint8 &oG, uint8 &oB);
    00328   virtual void GetPixel (int x, int y, uint8 &oR, uint8 &oG, uint8 &oB, uint8 &oA);
    00329
    00334   virtual bool PerformExtension (char const* command, ...);
    00335
    00340   virtual bool PerformExtensionV (char const* command, va_list);
    00341
    00343   virtual csPtr<iImage> ScreenShot ();
    00344
    00346   virtual void AllowResize (bool /*iAllow*/) { };
    00347
    00349   virtual bool Resize (int w, int h);
    00350
    00352   virtual iNativeWindow* GetNativeWindow ();
    00353
    00355   virtual bool GetFullScreen ()
    00356   { return FullScreen; }
    00357
    00361   virtual void SetFullScreen (bool b);
    00362
    00364   virtual bool SetMousePosition (int x, int y);
    00365
    00375   virtual bool SetMouseCursor (csMouseCursorID iShape);
    00376
    00384   virtual bool SetMouseCursor (iImage *image, const csRGBcolor* keycolor = 0,
    00385                                int hotspot_x = 0, int hotspot_y = 0,
    00386                                csRGBcolor fg = csRGBcolor(255,255,255),
    00387                                csRGBcolor bg = csRGBcolor(0,0,0));
    00388
    00389   struct EventHandler : public scfImplementation1<EventHandler, iEventHandler>
    00390   {
    00391   private:
    00392     csGraphics2D* parent;
    00393   public:
    00394     EventHandler (csGraphics2D* parent) : scfImplementationType (this),
    00395       parent(parent) {}
    00396     virtual bool HandleEvent (iEvent& e) { return parent->HandleEvent(e); }
    00397     CS_EVENTHANDLER_NAMES("crystalspace.graphics2d.common")
    00398     CS_EVENTHANDLER_NIL_CONSTRAINTS
    00399   } * scfiEventHandler;
    00400
    00401 protected:
    00408
    00409   static void DrawPixel8 (csGraphics2D *This, int x, int y, int color);
    00411   static unsigned char *GetPixelAt8 (csGraphics2D *This, int x, int y);
    00412
    00414   static void DrawPixel16 (csGraphics2D *This, int x, int y, int color);
    00416   static unsigned char *GetPixelAt16 (csGraphics2D *This, int x, int y);
    00417
    00419   static void DrawPixel32 (csGraphics2D *This, int x, int y, int color);
    00421   static unsigned char *GetPixelAt32 (csGraphics2D *This, int x, int y);
    00422
    00425   // Virtual Alert function so it can be overridden by subclasses
    00426   // of csGraphics2D.
    00427   virtual void AlertV (int type, const char* title, const char* okMsg,
    00428     const char* msg, va_list args);
    00429   virtual void Alert (int type, const char* title, const char* okMsg,
    00430       const char* msg, ...);
    00435   // Virtual SetTitle function so it can be overridden by subclasses
    00436   // of csGraphics2D.
    00437   virtual void SetTitle (const char* title);
    00442   virtual bool GetOptionDescription (int idx, csOptionDescription*);
    00443   virtual bool SetOption (int id, csVariant* value);
    00444   virtual bool GetOption (int id, csVariant* value);
    00449   virtual bool DebugCommand (const char* cmd);
    00450   virtual int GetSupportedTests () const { return 0; }
    00451   virtual csPtr<iString> UnitTest () { return 0; }
    00452   virtual csPtr<iString> StateTest ()  { return 0; }
    00453   virtual csTicks Benchmark (int /*num_iterations*/) { return 0; }
    00454   virtual csPtr<iString> Dump ()  { return 0; }
    00455   virtual void Dump (iGraphics3D* /*g3d*/)  { }
    00457 };
    00458
    00461 #endif // __CS_CSPLUGINCOMMON_CANVAS_GRAPH2D_H__