| 1 | /* $Id: oslibgpi.cpp,v 1.3 2001-10-18 07:49:37 sandervl Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * GPI interface code
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| 5 | *
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| 6 | * Copyright 1999 Christoph Bratschi (cbratschi@datacomm.ch)
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| 7 | *
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| 8 | * Project Odin Software License can be found in LICENSE.TXT
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| 9 | *
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| 10 | */
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| 11 |
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| 12 | #define INCL_GPI
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| 13 | #define INCL_WIN
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| 14 | #include <os2wrap.h> //Odin32 OS/2 api wrappers
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| 15 | #include <stdlib.h>
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| 16 | #include <string.h>
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| 17 | #include <math.h>
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| 18 | #include "win32type.h"
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| 19 | #include <winconst.h>
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| 20 | #include <winuser32.h>
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| 21 | #include "oslibgpi.h"
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| 22 | #include <misc.h>
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| 23 |
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| 24 | //******************************************************************************
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| 25 | //******************************************************************************
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| 26 | LPRGNDATA OSLibQueryVisibleRegion(HWND hwnd, DWORD screenHeight)
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| 27 | {
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| 28 | HRGN hrgnVis = 0;
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| 29 | RECTL rcl = {0,0,1,1};
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| 30 | LPRGNDATA lpRgnData = 0;
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| 31 | HPS hps = 0;
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| 32 | LONG temp, i;
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| 33 | ULONG bufSizeNeeded;
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| 34 | PRECTL pRectl;
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| 35 |
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| 36 | if(screenHeight == 0) {
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| 37 | RECTL desktopRectl;
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| 38 | WinQueryWindowRect(HWND_DESKTOP, &desktopRectl);
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| 39 | screenHeight = desktopRectl.xRight;
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| 40 | }
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| 41 |
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| 42 | hps = WinGetPS(Win32ToOS2FrameHandle(hwnd));
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| 43 | if(hps == NULL) {
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| 44 | dprintf(("OSLibQueryVisibleRegion: WinGetPS %x failed", hwnd));
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| 45 | return NULL;
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| 46 | }
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| 47 | hrgnVis = GreCreateRectRegion(hps, &rcl, 1);
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| 48 | GreCopyClipRegion(hps, hrgnVis, 0, COPYCRGN_VISRGN);
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| 49 |
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| 50 | RGNRECT rgnRect;
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| 51 | rgnRect.ircStart = 1;
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| 52 | rgnRect.crc = 0;
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| 53 | rgnRect.ulDirection = RECTDIR_LFRT_TOPBOT;
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| 54 | if(!GpiQueryRegionRects(hps, hrgnVis, NULL, &rgnRect, NULL))
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| 55 | {
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| 56 | dprintf(("WARNING: GpiQueryRegionRects failed! (%x)", WinGetLastError(0)));
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| 57 | goto failure;
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| 58 | }
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| 59 | bufSizeNeeded = rgnRect.crcReturned * sizeof(RECT) + sizeof (RGNDATAHEADER);
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| 60 | lpRgnData = (LPRGNDATA)malloc(bufSizeNeeded);
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| 61 |
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| 62 | pRectl = (PRECTL)lpRgnData->Buffer;
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| 63 | rgnRect.crc = rgnRect.crcReturned;
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| 64 | if(!GpiQueryRegionRects(hps, hrgnVis, NULL, &rgnRect, pRectl))
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| 65 | {
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| 66 | dprintf(("WARNING: GpiQueryRegionRects failed! (%x)", WinGetLastError(0)));
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| 67 | goto failure;
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| 68 | }
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| 69 | for(i=0;i<rgnRect.crcReturned;i++) {
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| 70 | temp = pRectl[i].yTop;
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| 71 | dprintf(("Region rect %d (%d,%d)(%d,%d)", i, pRectl[i].xLeft, pRectl[i].yBottom, pRectl[i].xRight, pRectl[i].yTop));
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| 72 | pRectl[i].yTop = screenHeight - pRectl[i].yBottom;
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| 73 | pRectl[i].yBottom = screenHeight - temp;
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| 74 | dprintf(("Region rect %d (%d,%d)(%d,%d)", i, pRectl[i].xLeft, pRectl[i].yBottom, pRectl[i].xRight, pRectl[i].yTop));
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| 75 | }
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| 76 |
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| 77 | RECTL boundRect;
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| 78 | GpiQueryRegionBox(hps, hrgnVis, &boundRect);
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| 79 |
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| 80 | lpRgnData->rdh.dwSize = sizeof(lpRgnData->rdh);
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| 81 | lpRgnData->rdh.iType = RDH_RECTANGLES_W; // one and only possible value
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| 82 | lpRgnData->rdh.nCount = rgnRect.crcReturned;
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| 83 | lpRgnData->rdh.nRgnSize = rgnRect.crcReturned * sizeof(RECT);
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| 84 |
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| 85 | //flip top & bottom for bounding rectangle (not really necessary; but cleaner coding)
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| 86 | dprintf(("Boundary (%d,%d)(%d,%d)", boundRect.xLeft, boundRect.yBottom, boundRect.xRight, boundRect.yTop));
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| 87 | lpRgnData->rdh.rcBound.left = boundRect.xLeft;
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| 88 | lpRgnData->rdh.rcBound.right = boundRect.xRight;
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| 89 | lpRgnData->rdh.rcBound.top = screenHeight - boundRect.yBottom;
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| 90 | lpRgnData->rdh.rcBound.bottom = screenHeight - boundRect.yTop;
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| 91 | dprintf(("Boundary (%d,%d)(%d,%d)", boundRect.xLeft, boundRect.yBottom, boundRect.xRight, boundRect.yTop));
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| 92 |
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| 93 | // Destroy the region now we have finished with it.
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| 94 | GreDestroyRegion(hps, hrgnVis);
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| 95 | WinReleasePS(hps);
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| 96 | return lpRgnData;
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| 97 |
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| 98 | failure:
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| 99 | if(lpRgnData) free(lpRgnData);
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| 100 | if(hrgnVis) GreDestroyRegion(hps, hrgnVis);
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| 101 | if(hps) WinReleasePS(hps);
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| 102 | return 0;
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| 103 | }
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| 104 | //******************************************************************************
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| 105 | //******************************************************************************
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| 106 |
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