rom/graphics/mrgcop.c

   1 /*
   2     Copyright © 1995-2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function MrgCop()
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <exec/memory.h>
  11 #include <graphics/gfxbase.h>
  12 #include <graphics/view.h>
  13 #include <graphics/rastport.h>
  14 #include <oop/oop.h>
  15 #include <proto/exec.h>
  16 #include <proto/oop.h>
  17
  18 #include "graphics_intern.h"
  19 #include "gfxfuncsupport.h"
  20
  21 /*****************************************************************************
  22
  23     NAME */
  24 #include <proto/graphics.h>
  25
  26         AROS_LH1(ULONG, MrgCop,
  27
  28 /*  SYNOPSIS */
  29         AROS_LHA(struct View *, view, A1),
  30
  31 /*  LOCATION */
  32         struct GfxBase *, GfxBase, 35, Graphics)
  33
  34 /*  FUNCTION
  35         Prepare the view for being displayed. Calculate necessary internal data.
  36         For Amiga(tm) chipset this function also merges together the display, color, sprite and user
  37         coprocessor instructions into a single coprocessor instruction stream.
  38
  39     INPUTS
  40         view - a pointer to the view structure to prepare
  41
  42     RESULT
  43         error - ULONG error value indicating either lack of memory to build the system data,
  44                         or that MrgCop() has no work to do - ie there where no viewPorts in the list.
  45
  46     NOTES
  47         Pre-v39 AmigaOS returns void.
  48
  49         If the given view is already on display, changes appear immediately.
  50
  51     EXAMPLE
  52
  53     BUGS
  54
  55     SEE ALSO
  56
  57     INTERNALS
  58
  59     HISTORY
  60
  61
  62 ******************************************************************************/
  63 {
  64     AROS_LIBFUNC_INIT
  65
  66     struct ViewPort *first, *vp;
  67     struct HIDD_ViewPortData *vpd;
  68     struct HIDD_ViewPortData *prev_vpd;
  69     struct monitor_driverdata *mdd;
  70     struct monitor_driverdata *prev_mdd = NULL;
  71
  72     /* Build lists of displayed bitmaps, one list per display.
  73        Lists are embedded in ViewPortExtra.DriverData field. Start of
  74        the list is the first ViewPort for this display. */
  75     for (first = view->ViewPort; first; first = first->Next) {
  76         /* Ignore hidden ViewPorts */
  77         if (!(first->Modes & VP_HIDE)) {
  78
  79             mdd = GET_VP_DRIVERDATA(first);
  80             /* Ignore next ViewPort if it belongs to the same display.
  81                This makes us slightly faster */
  82             if (mdd == prev_mdd)
  83                 continue;
  84             prev_mdd = mdd;
  85
  86             /* We don't check GfxLookUp() result against NULL because MakeVPort() has
  87                already took care about this. If MrgCop() was called with some mailformed
  88                ViewPorts, it's not our problem */
  89             prev_vpd = VPE_DATA((struct ViewPortExtra *)GfxLookUp(first));
  90             prev_vpd->Next = NULL;
  91             D(bug("[MrgCop] First ViewPort: 0x%p, data 0x%p\n", first, prev_vpd));
  92
  93             /* Now we look down the list for ViewPorts with the same display driver as
  94                current ViewPort and add them to a list */
  95             for (vp = first->Next; vp; vp = vp->Next) {
  96                 if (!(vp->Modes & VP_HIDE)) {
  97
  98                     if (GET_VP_DRIVERDATA(vp) == mdd) {
  99                         vpd = VPE_DATA((struct ViewPortExtra *)GfxLookUp(vp));
 100                         D(bug("[MrgCop] Attaching ViewPort 0x%p, data 0x%p\n", vp, vpd));
 101
 102                         vpd->Next = NULL;
 103                         prev_vpd->Next = vpd;
 104                         prev_vpd = vpd;
 105                     }
 106                 }
 107             }
 108         }
 109     }
 110
 111     ObtainSemaphore(GfxBase->ActiViewCprSemaphore);
 112
 113     /* If the given view is a currently displayed one, refresh immediately */
 114     if (GfxBase->ActiView == view)
 115         driver_LoadView(view, GfxBase);
 116
 117     ReleaseSemaphore(GfxBase->ActiViewCprSemaphore);
 118
 119     return prev_mdd ? MCOP_OK : MCOP_NOP;
 120
 121     AROS_LIBFUNC_EXIT
 122 } /* MrgCop */