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/* The following program will create a display with the same attributes
** as the user's Workbench screen. It does this by first inquiring as
** to those attributes, duplicating them, and then creating a similar
** display.
*/
/**********************************************************************/
/* */
/* WBClone.c: To clone the Workbench using graphics calls */
/* */
/* Compile : SAS/C 5.10a LC -b1 -cfist -L -v -y */
/* */
/**********************************************************************/
#include <exec/types.h>
#include <exec/exec.h>
#include <clib/exec_protos.h>
#include <intuition/screens.h>
#include <intuition/intuition.h>
#include <intuition/intuitionbase.h>
#include <clib/intuition_protos.h>
#include <graphics/gfx.h>
#include <graphics/gfxbase.h>
#include <graphics/view.h>
#include <graphics/gfxnodes.h>
#include <graphics/videocontrol.h>
#include <clib/graphics_protos.h>
#include <stdio.h>
#include <stdlib.h>
#define INTUITIONNAME "intuition.library"
#ifdef LATTICE
int CXBRK(void) { return(0); } /* Disable Lattice CTRL/C handling */
int chkabort(void) { return(0); } /* really */
#endif
/*********************************************************************/
/* GLOBAL VARIABLES */
/*********************************************************************/
struct IntuitionBase *IntuitionBase = NULL ;
struct GfxBase *GfxBase = NULL ;
/**********************************************************************/
/* */
/* VOID Error (char *String) */
/* */
/* Print string and exit */
/* */
/**********************************************************************/
VOID Error (char *String)
{
VOID CloseAll (VOID) ;
printf (String) ;
CloseAll () ;
exit(0) ;
}
/**********************************************************************/
/* */
/* VOID Init () */
/* */
/* Opens all the required libraries allocates all memory, etc. */
/* */
/**********************************************************************/
VOID Init ( VOID )
{
/* Open the intuition library.... */
if ((IntuitionBase = (struct IntuitionBase *)OpenLibrary (INTUITIONNAME, 37L)) == NULL)
Error ("Could not open the Intuition.library") ;
/* Open the graphics library.... */
if ((GfxBase = (struct GfxBase *)OpenLibrary (GRAPHICSNAME, 36L)) == NULL)
Error ("Could not open the Graphics.library") ;
}
/**********************************************************************/
/* */
/* VOID CloseAll () */
/* */
/* Closes and tidies up everything that was used. */
/* */
/**********************************************************************/
VOID CloseAll ( VOID )
{
/* Close everything in the reverse order in which they were opened */
/* Close the Graphics Library */
if (GfxBase)
CloseLibrary ((struct Library *) GfxBase) ;
/* Close the Intuition Library */
if (IntuitionBase)
CloseLibrary ((struct Library *) IntuitionBase) ;
}
/**********************************************************************/
/* */
/* VOID DestroyView(struct View *view) */
/* */
/* Close and free everything to do with the View */
/* */
/**********************************************************************/
VOID DestroyView(struct View *view)
{
struct ViewExtra *ve;
if (view)
{
if (ve = (struct ViewExtra *)GfxLookUp(view))
{
if (ve->Monitor)
CloseMonitor(ve->Monitor);
GfxFree((struct ExtendedNode *)ve);
}
/* Free up the copper lists */
if (view->LOFCprList)
FreeCprList(view->LOFCprList);
if (view->SHFCprList)
FreeCprList(view->SHFCprList);
FreeVec(view);
}
}
/**********************************************************************/
/* */
/* struct View *DupView(struct View *v, ULONG ModeID) */
/* */
/* Duplicate the View. */
/* */
/**********************************************************************/
struct View *DupView(struct View *v, ULONG ModeID)
{
/* Allocate and init a View structure. Also, get a ViewExtra
* structure and attach the monitor type to the View.
*/
struct View *view = NULL;
struct ViewExtra *ve = NULL;
struct MonitorSpec *mspc = NULL;
if (view = AllocVec(sizeof(struct View), MEMF_PUBLIC | MEMF_CLEAR))
{
if (ve = GfxNew(VIEW_EXTRA_TYPE))
{
if (mspc = OpenMonitor(NULL, ModeID))
{
InitView(view);
view->DyOffset = v->DyOffset;
view->DxOffset = v->DxOffset;
view->Modes = v->Modes;
GfxAssociate(view, (struct ExtendedNode *)ve);
ve->Monitor = mspc;
}
else printf("Could not open monitor\n");
}
else printf("Could not get ViewExtra\n");
}
else printf("Could not create View\n");
if (view && ve && mspc)
return(view);
else
{
DestroyView(view);
return(NULL);
}
}
/**********************************************************************/
/* */
/* VOID DestroyViewPort(struct ViewPort *vp) */
/* */
/* Close and free everything to do with the ViewPort. */
/* */
/**********************************************************************/
VOID DestroyViewPort(struct ViewPort *vp)
{
if (vp)
{
/* Find the ViewPort's ColorMap. From that use VideoControl
* to get the ViewPortExtra, and free it.
* Then free the ColorMap, and finally the ViewPort itself.
*/
struct ColorMap *cm = vp->ColorMap;
struct TagItem ti[] =
{
{VTAG_VIEWPORTEXTRA_GET, NULL}, /* <-- This field will be filled in */
{VTAG_END_CM, NULL}
};
if (cm)
{
if (VideoControl(cm, ti) == NULL)
GfxFree((struct ExtendedNode *)ti[0].ti_Data);
else
printf("VideoControl error in DestroyViewPort()\n");
FreeColorMap(cm);
}
else
{
printf("Could not free the ColorMap\n");
}
FreeVPortCopLists(vp);
FreeVec(vp);
}
}
/**********************************************************************/
/* */
/* struct ViewPort *DupViewPort(struct ViewPort *vp, ULONG ModeID) */
/* */
/* Duplicate the ViewPort. */
/* */
/**********************************************************************/
struct ViewPort *DupViewPort(struct ViewPort *vp, ULONG ModeID)
{
/* Allocate and initialise a ViewPort. Copy the ViewPort width and
* heights, offsets, and modes values. Allocate and initialize a
* ColorMap.
*
* Also, allocate a ViewPortExtra, and copy the TextOScan values of the
* ModeID from the database into the ViewPortExtra.
*/
#define COLOURS 32
struct ViewPort *Myvp;
struct ViewPortExtra *vpe;
struct ColorMap *cm;
struct TagItem ti[] = /* to attach everything */
{
{VTAG_ATTACH_CM_SET, NULL}, /* these NULLs will be replaced in the code */
{VTAG_VIEWPORTEXTRA_SET, NULL},
{VTAG_NORMAL_DISP_SET, NULL},
{VTAG_END_CM, NULL}
};
struct DimensionInfo query = {0};
UWORD colour;
int c;
ULONG gotinfo = NULL;
if (Myvp = AllocVec(sizeof(struct ViewPort), MEMF_CLEAR | MEMF_PUBLIC))
{
if (vpe = (struct ViewPortExtra *)GfxNew(VIEWPORT_EXTRA_TYPE))
{
if (cm = GetColorMap(32))
{
if (gotinfo = GetDisplayInfoData(NULL, (APTR)&query,
sizeof(query), DTAG_DIMS, ModeID))
{
InitVPort(Myvp);
/* duplicate the ViewPort structure */
Myvp->DWidth = vp->DWidth;
Myvp->DHeight = vp->DHeight;
Myvp->DxOffset = vp->DxOffset;
Myvp->DyOffset = vp->DyOffset;
Myvp->Modes = vp->Modes;
Myvp->SpritePriorities = vp->SpritePriorities;
Myvp->ExtendedModes = vp->ExtendedModes;
/* duplicate the Overscan values */
vpe->DisplayClip = query.TxtOScan;
/* attach everything together */
ti[0].ti_Data = (ULONG)Myvp;
ti[1].ti_Data = (ULONG)vpe;
ti[2].ti_Data = (ULONG)FindDisplayInfo(ModeID);
if (VideoControl(cm, ti) != NULL)
{
printf("VideoControl error in CreateViewPort()\n");
}
/* copy the colours from the workbench */
for (c = 0; c < COLOURS; c++)
{
if ((colour = GetRGB4(vp->ColorMap, c)) != -1)
{
SetRGB4CM(cm, c, (colour >> 8),
((colour >> 4) & 0xf), (colour & 0xf));
}
}
}
else printf("Database error\n");
}
else printf("Could not get the ColorMap\n");
}
else printf("Could not get the ViewPortExtra\n");
}
else printf("Could not get the ViewPort\n");
if (Myvp && vpe && cm && gotinfo)
return(Myvp);
else
{
DestroyViewPort(vp);
return(NULL);
}
}
/***********************************************************************************/
/* */
/* VOID DestroyBitMap(struct BitMap *Mybm, SHORT width, SHORT height, SHORT depth) */
/* */
/* Close and free everything to do with the BitMap */
/* */
/***********************************************************************************/
VOID DestroyBitMap(struct BitMap *Mybm, SHORT width, SHORT height, SHORT depth)
{
int i;
if (Mybm)
{
for (i = 0; (i < depth); i++)
{
if (Mybm->Planes[i])
FreeRaster(Mybm->Planes[i], width, height);
}
FreeVec(Mybm);
}
}
/***********************************************************************/
/* */
/* struct BitMap *CreateBitMap(SHORT width, SHORT height, SHORT depth) */
/* */
/* Create the BitMap. */
/* */
/***********************************************************************/
struct BitMap *CreateBitMap(SHORT width, SHORT height, SHORT depth)
{
/* Allocate a BitMap structure, initialise it, and allocate each plane. */
struct BitMap *Mybm;
PLANEPTR allocated = (PLANEPTR) 1;
int i;
if (Mybm = AllocVec(sizeof(struct BitMap), MEMF_CLEAR | MEMF_PUBLIC))
{
InitBitMap(Mybm, depth, width, height);
for (i = 0; ((i < depth) && (allocated)); i++)
allocated = (Mybm->Planes[i] = AllocRaster(width, height));
if (allocated == NULL)
{
printf("Could not allocate all the planes\n");
DestroyBitMap(Mybm, width, height, depth);
Mybm = NULL;
}
}
else printf("Could not get BitMap\n");
return(Mybm);
}
/********************************************************************************/
/* */
/* VOID ShowView(struct View *view, struct ViewPort *vp, struct BitMap *bm, */
/* SHORT width, SHORT height) */
/* */
/* Assemble and display the View. */
/* */
/********************************************************************************/
VOID ShowView(struct View *view, struct ViewPort *vp, struct BitMap *bm,
SHORT width, SHORT height)
{
/* Attach the BitMap to the ViewPort via a RasInfo. Attach the ViewPort
* to the View. Clear the BitMap, and draw into it by attaching the BitMap
* to a RastPort. Then MakeVPort(), MrgCop() and LoadView().
* Just wait for the user to press <RETURN> before returning.
*/
struct RastPort *rp;
struct RasInfo *ri;
if (rp = AllocVec(sizeof(struct RastPort), MEMF_CLEAR | MEMF_PUBLIC))
{
if (ri = AllocVec(sizeof(struct RasInfo), MEMF_CLEAR | MEMF_PUBLIC))
{
InitRastPort(rp);
ri->BitMap = rp->BitMap = bm;
vp->RasInfo = ri;
view->ViewPort = vp;
/* render */
SetRast(rp, 0); /* clear the background */
SetAPen(rp, ((1 << bm->Depth) - 1)); /* use the last pen */
Move(rp, 0, 0);
Draw(rp, width, 0);
Draw(rp, width, height);
Draw(rp, 0, height);
Draw(rp, 0, 0);
/* display it */
MakeVPort(view, vp);
MrgCop(view);
LoadView(view);
getchar();
/* bring back the system */
RethinkDisplay();
FreeVec(ri);
}
else printf("Could not get RasInfo\n");
FreeVec(rp);
}
else printf("Could not get RastPort\n");
}
/**********************************************************************/
/* */
/* VOID main (int argc, char *argv[]) */
/* */
/* Clone the Workbench View using Graphics Library calls. */
/* */
/**********************************************************************/
VOID main (int argc, char *argv[])
{
struct Screen *wb;
struct View *Myview;
struct ViewPort *Myvp;
struct BitMap *Mybm;
ULONG ModeID;
ULONG IbaseLock;
Init () ; /* to open the libraries */
/* To clone the Workbench using graphics calls involves duplicating
* the Workbench ViewPort, ViewPort mode, and Intuition's View.
* This also involves duplicating the DisplayClip for the overscan
* value, the colours, and the View position.
*
* When this is all done, the View, ViewPort, ColorMap and BitMap
* (and ViewPortExtra, ViewExtra and RasInfo) all have to be linked
* together, and the copperlists made to create the display.
*
* This is not as difficult as it sounds (trust me!)
*/
/* First, lock the Workbench screen, so no changes can be made to it
* while we are duplicating it.
*/
if (wb = LockPubScreen("Workbench"))
{
/* Find the Workbench's ModeID. This is a 32-bit number that
* identifies the monitor type, and the display mode of that monitor.
*/
ModeID = GetVPModeID(&wb->ViewPort);
/* We need to duplicate Intuition's View structure, so lock IntuitionBase
* to prevent the View changing under our feet.
*/
IbaseLock = LockIBase(0);
if (Myview = DupView(&IntuitionBase->ViewLord, ModeID))
{
/* The View has been cloned, so we don't need to keep it locked. */
UnlockIBase(IbaseLock);
/* Now duplicate the Workbench's ViewPort. Remember, we still have
* the Workbench locked.
*/
if (Myvp = DupViewPort(&wb->ViewPort, ModeID))
{
/* Create a BitMap to render into. This will be of the
* same dimensions as the Workbench.
*/
if (Mybm = CreateBitMap(wb->Width, wb->Height, wb->BitMap.Depth))
{
/* Now we have everything copied, show something */
ShowView(Myview, Myvp, Mybm, wb->Width-1, wb->Height-1);
/* Now free up everything we have allocated */
DestroyBitMap(Mybm, wb->Width, wb->Height, wb->BitMap.Depth);
}
DestroyViewPort(Myvp);
}
DestroyView(Myview);
}
else
{
UnlockIBase(IbaseLock);
}
UnlockPubScreen(NULL, wb);
}
CloseAll () ;
}