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C/C++ Source or Header  |  1996-10-14  |  3.8 KB  |  138 lines
  1. /********************************************************************************************\
  2. *                                                                                                                            *
  3. *        How To double-buffer a CyberScreen (Wie man einen Double Buffer CyberScreen benutzt)    *
  4. *                                                                                                                            *
  5. *        (by Gerd Kautzmann,  Email to gerd@ufoo.phase5.de)                                                    *
  6. *        Note: There is only one way to be shure that two screens are simultanously at a grafik *
  7. *                card, let them be one screen, and scroll it.                                                    *
  8. *                Es gibt nur eine Möglichkeit zwei Screen so zu öffnen, daß sich beide auf der     *
  9. *                Grafikkarte befinden, indem man eine doppelt so hohen (breiten) Screen benutzt,  *
  10. *                und diesen dann hin und herscrollt.                                                                * 
  11. *        LastNode: You will need cybergraphics.library 40.92 and cyberintuition.library 40.33    *
  12. *                                                                                                                            *
  13. \********************************************************************************************/
  14.  
  15.  
  16.  
  17. #include <libraries/configvars.h>
  18. #include <dos/dos.h>
  19. #include <stdio.h>
  20. #include <stdlib.h>
  21. #include <exec/memory.h>
  22.  
  23. #include <clib/exec_protos.h>
  24. #include <clib/graphics_protos.h>
  25. #include <clib/intuition_protos.h>
  26. #include <clib/dos_protos.h>
  27. #include <proto/exec.h>
  28. #include <proto/intuition.h>
  29. #include <proto/graphics.h>
  30.  
  31. /*                        Includes a la Cybervision            */
  32.  
  33. #include <proto/cybergraphics.h>
  34. #include <cybergraphics/cybergraphics.h>
  35. #define    MANYMB 0
  36.  
  37. #if MANYMB
  38.  
  39. /*                     Works only if more than 2MB Grafik Ram    */
  40.  
  41. #define WINX    640
  42. #define WINY    480
  43.  
  44. #else
  45.  
  46. #define WINX    640
  47. #define WINY    400
  48.  
  49. #endif
  50.  
  51. /*#define MODE    0x40120052    */    /* 640 x 480 Mode */
  52. #define MODE    0x40120051    /* 320 x 200 Mode */    
  53. /*#define MODE 0x40120050    */ /* 800 x 600 Mode */    
  54.  
  55. #define DEPTH    32
  56.  
  57. /*                Protos             */
  58.  
  59. void CloseAll(void);
  60. void ToggleScreen(void);
  61.  
  62. struct Rectangle ScreenRectangle = {
  63.         0,0,
  64.         WINX-1,WINY-1,
  65.         };
  66.  
  67. struct RastPort     *rp = NULL;
  68. struct Screen        *Scr= NULL;
  69. struct ViewPort    *vp = NULL;
  70. struct RasInfo        *ri = NULL;
  71.  
  72. struct IntuitionBase *IntuitionBase = NULL; 
  73. struct GfxBase            *GfxBase         = NULL;
  74. struct Library            *CyberGfxBase    = NULL;
  75.  
  76. RyOffset    = WINY;
  77. int    i;
  78.  
  79. main()
  80. {
  81.     if (!(IntuitionBase=(struct IntuitionBase *)OpenLibrary("intuition.library",0L)))
  82.         { printf ("ERROR: Konnte Intuition Library nicht öffnen\n"); CloseAll(); }
  83.     if (!(CyberGfxBase=(struct Library *)OpenLibrary("cybergraphics.library",40)))
  84.         { printf ("ERROR: Konnte Cyber Library nicht öffnen\n"); CloseAll();}
  85.       if (!(GfxBase=(struct GfxBase *)OpenLibrary("graphics.library",0L)))
  86.         { printf ("ERROR: Couldn't open GfX Base\n"); CloseAll(); }
  87.  
  88.  
  89.     if (!(Scr=OpenScreenTags(NULL,SA_DisplayID,MODE,
  90.                                             SA_Width,WINX,
  91.                                             SA_Height,WINY*2,
  92.                                             SA_Depth,DEPTH,
  93.                                             SA_Draggable,FALSE,
  94.                                             SA_AutoScroll,FALSE,
  95.                                             SA_Exclusive,TRUE,
  96.                                             SA_Quiet,TRUE,
  97.                                             SA_ShowTitle,FALSE,
  98.                                             SA_DClip,&ScreenRectangle,
  99.                                             TAG_DONE)))
  100.         { printf ("ERROR: Couldn't get any CyberScreen\n"); CloseAll(); }
  101.  
  102.     rp = &Scr->RastPort; 
  103.     vp = &Scr->ViewPort;
  104.     ri    = vp->RasInfo;
  105.  
  106.     FillPixelArray(rp,0,   0,WINX,  WINY,0x00ff0000);    /* Red Screen      */
  107.     FillPixelArray(rp,0,WINY,WINX,WINY*2,0x0000ff00);    /* Green Screen */
  108.  
  109.     for(i=0;i<10;i++)
  110.     {
  111.         ToggleScreen();
  112.         Delay(30);
  113.     }
  114.     CloseAll();
  115.  
  116. }
  117. void ToggleScreen()
  118. {
  119.     if ((ri->RyOffset = RyOffset) == WINY)
  120.         RyOffset = 0;
  121.     else
  122.         RyOffset = WINY;
  123.     ScrollVPort(vp);
  124. }
  125. /***********************************************************************************\
  126. *                                                                                                                *
  127. *        CloseAll                                                                                                *
  128. *                                                                                                                *
  129. \***********************************************************************************/
  130. void CloseAll()
  131. {
  132.     if (Scr) CloseScreen(Scr);
  133.     if (IntuitionBase) CloseLibrary ((struct Library *)IntuitionBase);
  134.     if (GfxBase) CloseLibrary ((struct Library *)GfxBase);
  135.     if (CyberGfxBase) CloseLibrary ((struct Library *)CyberGfxBase);
  136.     exit(0);
  137. }
  138.