168 lines
4.8 KiB
C
168 lines
4.8 KiB
C
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/****************************** Module*Header *****************************\
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* Module Name: mirror.c *
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* *
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* This module contains all the Right-To-Left (RTL) Mirroring support *
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* routines used to Right-To-Left mirror an icon on the fly so that *
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* it would be displayed normal on a RTL mirrored localized OS. This is *
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* mainly a concern for 3rd party Apps. *
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* *
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* *
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* Created: 01-Feb-1998 8:41:18 pm *
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* Author: Samer Arafeh [samera] *
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* *
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* Copyright (c) 1998 Microsoft Corporation *
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\**************************************************************************/
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#include "ctlspriv.h"
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/***************************************************************************\
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* MirrorIcon
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*
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* Mirror an Icon , given an Icon handle so that when these icons are displayed
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* on a Mirrored DC, they end would be displayed normal.
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*
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* History:
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* 04-Feb-1998 samera Created
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\***************************************************************************/
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BOOL WINAPI MirrorIcon(HICON* phiconSmall, HICON* phiconLarge)
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{
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HDC hdcScreen;
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HBITMAP hbm, hbmMask, hbmOld,hbmOldMask;
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BITMAP bm;
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HICON hicon[2] = {NULL,NULL};
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HICON hiconNew[2] = {NULL,NULL};
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ICONINFO ii ;
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int i;
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#ifdef WINNT
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#define IPIXELOFFSET 0
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#else // !WINNT
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#define IPIXELOFFSET 2
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#endif WINNT
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//
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// Synchronize access to global DCs now!
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// Allocate DCs if we didn't so far.
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//
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ENTERCRITICAL;
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if (!g_hdc && !g_hdcMask)
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{
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g_hdc = CreateCompatibleDC(NULL);
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if (g_hdc)
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{
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#ifndef UNIX
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#ifndef WINNT
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SetObjectOwner(g_hdc, HINST_THISDLL);
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#endif
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#endif /* !UNIX */
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g_hdcMask = CreateCompatibleDC(NULL);
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if( g_hdcMask )
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{
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#ifndef UNIX
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#ifndef WINNT
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SetObjectOwner(g_hdcMask, HINST_THISDLL);
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#endif
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#endif /* !UNIX */
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SET_DC_RTL_MIRRORED(g_hdc);
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SET_DC_RTL_MIRRORED(g_hdcMask);
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}
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else
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{
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DeleteDC( g_hdc );
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g_hdc = NULL;
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}
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}
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}
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if (phiconSmall)
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hicon[0] = *phiconSmall;
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if (phiconLarge)
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hicon[1] = *phiconLarge;
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//
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// Acquire the screen DC
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//
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hdcScreen = GetDC(NULL);
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if (g_hdc && g_hdcMask && hdcScreen)
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{
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for( i=0 ; i<(sizeof(hicon)/sizeof(HICON)) ; i++ )
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{
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if( hicon[i] )
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{
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if( GetIconInfo(hicon[i], &ii) &&
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GetObject(ii.hbmColor, sizeof(BITMAP), &bm))
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{
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//
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// I don't want these.
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//
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DeleteObject( ii.hbmMask );
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DeleteObject( ii.hbmColor );
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ii.hbmMask = ii.hbmColor = NULL;
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hbm = CreateCompatibleBitmap(hdcScreen, bm.bmWidth, bm.bmHeight);
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hbmMask = CreateBitmap(bm.bmWidth, bm.bmHeight, 1, 1, NULL);
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hbmOld = (HBITMAP)SelectObject(g_hdc, hbm);
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hbmOldMask = (HBITMAP)SelectObject(g_hdcMask, hbmMask);
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DrawIconEx(g_hdc, IPIXELOFFSET, 0, hicon[i], bm.bmWidth, bm.bmHeight, 0,
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NULL, DI_IMAGE);
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DrawIconEx(g_hdcMask, IPIXELOFFSET, 0, hicon[i], bm.bmWidth, bm.bmHeight, 0,
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NULL, DI_MASK);
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SelectObject(g_hdc, hbmOld);
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SelectObject(g_hdcMask, hbmOldMask);
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//
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// create the new mirrored icon, and delete bmps
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//
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ii.hbmMask = hbmMask;
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ii.hbmColor = hbm;
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hiconNew[i] = CreateIconIndirect(&ii);
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DeleteObject(hbm);
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DeleteObject(hbmMask);
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}
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}
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}
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}
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ReleaseDC(NULL, hdcScreen);
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//
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// Now we can reuse the global DCs
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//
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LEAVECRITICAL;
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//
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// Update icons if needed, and destroy old ones!
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//
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if (hicon[0] && hiconNew[0])
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{
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*phiconSmall = hiconNew[0];
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DestroyIcon(hicon[0]);
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}
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if (hicon[1] && hiconNew[1])
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{
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*phiconLarge = hiconNew[1];
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//
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// Don't delete twice
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//
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if (hicon[1] != hicon[0])
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DestroyIcon(hicon[1]);
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}
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return TRUE;
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}
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