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ivideo/graph2d.h

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00001 /*
00002     Copyright (C) 2001 by Jorrit Tyberghein
00003     Copyright (C) 1998-2000 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_IVIDEO_GRAPH2D_H__
00021 #define __CS_IVIDEO_GRAPH2D_H__
00022 
00031 #include <stdarg.h>
00032 #include "csutil/scf.h"
00033 #include "csgfx/rgbpixel.h"
00034 #include "ivideo/texture.h"
00035 #include "iengine/texture.h"
00036 #include "ivideo/cursor.h"
00037 
00038 class csRect;
00039 struct iImage;
00040 struct iFontServer;
00041 struct iFont;
00042 struct iNativeWindow;
00043 struct iGraphics2D;
00044 
00046 enum
00047 {
00052   CS_WRITE_BASELINE    = (1 << 0),
00056   CS_WRITE_NOANTIALIAS = (1 << 1), 
00057 };
00058 
00060 struct csPixelCoord
00061 {
00063   int x;
00065   int y;
00066 };
00067 
00071 struct csPixelFormat
00072 {
00078   uint32 RedMask, GreenMask, BlueMask;
00083   int RedShift, GreenShift, BlueShift;
00085   int RedBits, GreenBits, BlueBits;
00086 
00093   int PalEntries;
00094 
00104   int PixelBytes;
00105 
00110   void complete ()
00111   {
00112 #define COMPUTE(comp)                                                   \
00113     {                                                                   \
00114       unsigned long i, tmp = comp##Mask;                                \
00115       for (i = 0; tmp && !(tmp & 1); tmp >>= 1, i++) {}                 \
00116       comp##Shift = i;                                                  \
00117       for (i = 0; tmp & 1; tmp >>= 1, i++) {}                           \
00118       comp##Bits = i;                                                   \
00119     }
00120     COMPUTE (Red);
00121     COMPUTE (Green);
00122     COMPUTE (Blue);
00123 #undef COMPUTE
00124   }
00125 };
00126 
00128 struct csImageArea
00129 {
00130   int x, y, w, h;
00131   char *data;
00132 
00133   inline csImageArea (int sx, int sy, int sw, int sh)
00134   { x = sx; y = sy; w = sw; h = sh; data = 0; }
00135 };
00136 
00137 SCF_VERSION (iOffscreenCanvasCallback, 1, 0, 0);
00138 
00144 struct iOffscreenCanvasCallback : public iBase
00145 {
00147   virtual void FinishDraw (iGraphics2D* canvas) = 0;
00149   virtual void SetRGB (iGraphics2D* canvas, int idx, int r, int g, int b) = 0;
00150 };
00151 
00152 SCF_VERSION (iGraphics2D, 2, 4, 0);
00153 
00159 struct iGraphics2D : public iBase
00160 {
00162   virtual bool Open () = 0;
00163 
00165   virtual void Close () = 0;
00166 
00168   virtual int GetWidth () = 0;
00169 
00171   virtual int GetHeight () = 0;
00172 
00174   virtual int GetPage () = 0;
00175 
00177   virtual bool DoubleBuffer (bool Enable) = 0;
00178 
00180   virtual bool GetDoubleBufferState () = 0;
00181 
00183   virtual csPixelFormat *GetPixelFormat () = 0;
00184 
00190   virtual int GetPixelBytes () = 0;
00191 
00199   virtual int GetPalEntryCount () = 0;
00200 
00202   virtual csRGBpixel *GetPalette () = 0;
00203 
00205   virtual void SetRGB (int i, int r, int g, int b) = 0;
00207   virtual int FindRGB (int r, int g, int b) = 0;
00208 
00214   virtual void SetClipRect (int nMinX, int nMinY, int nMaxX, int nMaxY) = 0;
00215 
00217   virtual void GetClipRect(int& nMinX, int& nMinY, int& nMaxX, int& nMaxY) = 0;
00218 
00223   virtual bool BeginDraw () = 0;
00224 
00226   virtual void FinishDraw () = 0;
00227 
00233   virtual void Print (csRect *pArea) = 0;
00234 
00236   virtual void Clear (int color) = 0;
00237 
00239   virtual void ClearAll (int color) = 0;
00240 
00242   virtual void DrawLine (float x1, float y1, float x2, float y2, int color) = 0;
00243 
00245   virtual void DrawBox (int x, int y, int w, int h, int color) = 0;
00246 
00251   virtual bool ClipLine (float& x1, float& y1, float& x2, float& y2,
00252     int xmin, int ymin, int xmax, int ymax) = 0;
00253 
00255   virtual void DrawPixel (int x, int y, int color) = 0;
00256 
00258   virtual void DrawPixels (csPixelCoord* pixels, int num_pixels, int color) = 0;
00259 
00261   virtual void Blit (int x, int y, int width, int height,
00262         unsigned char* data) = 0;
00263 
00265   virtual unsigned char *GetPixelAt (int x, int y) = 0;
00266 
00268   virtual void GetPixel (int x, int y, uint8 &oR, uint8 &oG, uint8 &oB) = 0;
00269 
00275   virtual csImageArea *SaveArea (int x, int y, int w, int h) = 0;
00276 
00278   virtual void RestoreArea (csImageArea *Area, bool Free) = 0;
00279 
00281   virtual void FreeArea (csImageArea *Area) = 0;
00282 
00287   virtual void Write (iFont *font, int x, int y, int fg, int bg,
00288     const char *str, uint flags = 0) = 0;
00289 
00297   virtual void WriteBaseline (iFont *font, int x, int y, int fg, int bg,
00298     const char *str) = 0;
00299 
00301   virtual void AllowResize (bool iAllow) = 0;
00302 
00304   virtual bool Resize (int w, int h) = 0;
00305 
00307   virtual iFontServer *GetFontServer () = 0;
00308 
00316   virtual bool PerformExtension (char const* command, ...) = 0;
00317 
00323   virtual bool PerformExtensionV (char const* command, va_list) = 0;
00324 
00326   virtual csPtr<iImage> ScreenShot () = 0;
00327 
00332   virtual iNativeWindow* GetNativeWindow () = 0;
00333 
00335   virtual bool GetFullScreen () = 0;
00336 
00340   virtual void SetFullScreen (bool b) = 0;
00341 
00343   virtual bool SetMousePosition (int x, int y) = 0;
00344 
00353   virtual bool SetMouseCursor (csMouseCursorID iShape) = 0;
00354 
00362   virtual bool SetMouseCursor (iImage *image, csRGBcolor keycolor, 
00363                                int hotspot_x = 0, int hotspot_y = 0,
00364                                csRGBcolor fg = csRGBcolor(255,255,255),
00365                                csRGBcolor bg = csRGBcolor(0,0,0)) = 0;
00366 
00372   virtual bool SetGamma (float gamma) = 0;
00373 
00377   virtual float GetGamma () const = 0;
00378 
00387   virtual csPtr<iGraphics2D> CreateOffscreenCanvas (
00388         void* memory, int width, int height, int depth,
00389         iOffscreenCanvasCallback* ofscb) = 0;
00390 };
00391 
00394 #endif // __CS_IVIDEO_GRAPH2D_H__
00395 

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