reactos/subsystems/win32/win32k/objects/dcstate.c

   1 /*
   2  * COPYRIGHT:         See COPYING in the top level directory
   3  * PROJECT:           ReactOS kernel
   4  * PURPOSE:           Functions for saving and restoring dc states
   5  * FILE:              subsystem/win32/win32k/objects/dcstate.c
   6  * PROGRAMER:         Timo Kreuzer (timo.kreuzer@rectos.org)
   7  */
   8
   9 #include <win32k.h>
  10
  11 #define NDEBUG
  12 #include <debug.h>
  13
  14 VOID
  15 FASTCALL
  16 DC_vCopyState(PDC pdcSrc, PDC pdcDst, BOOL To)
  17 {
  18     DPRINT("DC_vCopyState(%p, %p)\n", pdcSrc->BaseObject.hHmgr, pdcDst->BaseObject.hHmgr);
  19
  20     /* Copy full DC attribute */
  21     *pdcDst->pdcattr = *pdcSrc->pdcattr;
  22
  23     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
  24     /* The VisRectRegion field needs to be set to a valid state */
  25
  26     /* Mark some fields as dirty */
  27     pdcDst->pdcattr->ulDirty_ |= 0x0012001f; // Note: Use if, To is FALSE....
  28
  29     /* Copy DC level */
  30     pdcDst->dclevel.pColorSpace     = pdcSrc->dclevel.pColorSpace;
  31     pdcDst->dclevel.lSaveDepth      = pdcSrc->dclevel.lSaveDepth;
  32     pdcDst->dclevel.hdcSave         = pdcSrc->dclevel.hdcSave;
  33     pdcDst->dclevel.laPath          = pdcSrc->dclevel.laPath;
  34     pdcDst->dclevel.ca              = pdcSrc->dclevel.ca;
  35     pdcDst->dclevel.mxWorldToDevice = pdcSrc->dclevel.mxWorldToDevice;
  36     pdcDst->dclevel.mxDeviceToWorld = pdcSrc->dclevel.mxDeviceToWorld;
  37     pdcDst->dclevel.mxWorldToPage   = pdcSrc->dclevel.mxWorldToPage;
  38     pdcDst->dclevel.efM11PtoD       = pdcSrc->dclevel.efM11PtoD;
  39     pdcDst->dclevel.efM22PtoD       = pdcSrc->dclevel.efM22PtoD;
  40     pdcDst->dclevel.sizl            = pdcSrc->dclevel.sizl;
  41     pdcDst->dclevel.hpal            = pdcSrc->dclevel.hpal;
  42
  43     /* Handle references here correctly */
  44     DC_vSelectFillBrush(pdcDst, pdcSrc->dclevel.pbrFill);
  45     DC_vSelectLineBrush(pdcDst, pdcSrc->dclevel.pbrLine);
  46     DC_vSelectPalette(pdcDst, pdcSrc->dclevel.ppal);
  47
  48     // FIXME: handle refs
  49     pdcDst->dclevel.plfnt           = pdcSrc->dclevel.plfnt;
  50
  51     /* Get/SetDCState() don't change hVisRgn field ("Undoc. Windows" p.559). */
  52     if (To) // Copy "To" SaveDC state.
  53     {
  54         if (pdcSrc->rosdc.hClipRgn)
  55         {
  56            pdcDst->rosdc.hClipRgn = IntSysCreateRectRgn(0, 0, 0, 0);
  57            NtGdiCombineRgn(pdcDst->rosdc.hClipRgn, pdcSrc->rosdc.hClipRgn, 0, RGN_COPY);
  58         }
  59         // FIXME! Handle prgnMeta!
  60     }
  61     else // Copy "!To" RestoreDC state.
  62     {  /* The VisRectRegion field needs to be set to a valid state */
  63        GdiExtSelectClipRgn(pdcDst, pdcSrc->rosdc.hClipRgn, RGN_COPY);
  64     }
  65 }
  66
  67
  68 BOOL FASTCALL
  69 IntGdiCleanDC(HDC hDC)
  70 {
  71     PDC dc;
  72     if (!hDC) return FALSE;
  73     dc = DC_LockDc(hDC);
  74     if (!dc) return FALSE;
  75     // Clean the DC
  76     if (defaultDCstate) DC_vCopyState(defaultDCstate, dc, FALSE);
  77
  78     DC_UnlockDc(dc);
  79
  80     return TRUE;
  81 }
  82
  83
  84 BOOL
  85 APIENTRY
  86 NtGdiResetDC(
  87     IN HDC hdc,
  88     IN LPDEVMODEW pdm,
  89     OUT PBOOL pbBanding,
  90     IN OPTIONAL VOID *pDriverInfo2,
  91     OUT VOID *ppUMdhpdev)
  92 {
  93     UNIMPLEMENTED;
  94     return 0;
  95 }
  96
  97
  98 VOID
  99 NTAPI
 100 DC_vRestoreDC(
 101     IN PDC pdc,
 102     INT iSaveLevel)
 103 {
 104     PEPROCESS pepCurrentProcess;
 105     HDC hdcSave;
 106     PDC pdcSave;
 107
 108     ASSERT(iSaveLevel > 0);
 109     DPRINT("DC_vRestoreDC(%p, %ld)\n", pdc->BaseObject.hHmgr, iSaveLevel);
 110
 111     /* Get current process */
 112     pepCurrentProcess = PsGetCurrentProcess();
 113
 114     /* Loop the save levels */
 115     while (pdc->dclevel.lSaveDepth > iSaveLevel)
 116     {
 117         hdcSave = pdc->dclevel.hdcSave;
 118         DPRINT("RestoreDC = %p\n", hdcSave);
 119
 120         /* Set us as the owner */
 121         if (!GDIOBJ_SetOwnership(hdcSave, pepCurrentProcess))
 122         {
 123             /* Could not get ownership. That's bad! */
 124             DPRINT1("Could not get ownership of saved DC (%p) for hdc %p!\n",
 125                     hdcSave, pdc->BaseObject.hHmgr);
 126             return;// FALSE;
 127         }
 128
 129         /* Lock the saved dc */
 130         pdcSave = DC_LockDc(hdcSave);
 131         if (!pdcSave)
 132         {
 133             /* WTF? Internal error! */
 134             DPRINT1("Could not lock the saved DC (%p) for dc %p!\n",
 135                     hdcSave, pdc->BaseObject.hHmgr);
 136             return;// FALSE;
 137         }
 138
 139         /* Remove the saved dc from the queue */
 140         pdc->dclevel.hdcSave = pdcSave->dclevel.hdcSave;
 141
 142         /* Decrement save level */
 143         pdc->dclevel.lSaveDepth--;
 144
 145         /* Is this the state we want? */
 146         if (pdc->dclevel.lSaveDepth == iSaveLevel)
 147         {
 148             /* Copy the state back */
 149             DC_vCopyState(pdcSave, pdc, FALSE);
 150
 151             /* Only memory DC's change their surface */
 152             if (pdc->dctype == DCTYPE_MEMORY)
 153                 DC_vSelectSurface(pdc, pdcSave->dclevel.pSurface);
 154
 155             // Restore Path by removing it, if the Save flag is set.
 156             // BeginPath will takecare of the rest.
 157             if (pdc->dclevel.hPath && pdc->dclevel.flPath & DCPATH_SAVE)
 158             {
 159                 PATH_Delete(pdc->dclevel.hPath);
 160                 pdc->dclevel.hPath = 0;
 161                 pdc->dclevel.flPath &= ~DCPATH_SAVE;
 162             }
 163         }
 164
 165         /* Prevent save dc from being restored */
 166         pdcSave->dclevel.lSaveDepth = 1;
 167
 168         /* Unlock it */
 169         DC_UnlockDc(pdcSave);
 170         /* Delete the saved dc */
 171         GreDeleteObject(hdcSave);
 172     }
 173
 174     DPRINT("Leave DC_vRestoreDC()\n");
 175 }
 176
 177
 178
 179 BOOL
 180 APIENTRY
 181 NtGdiRestoreDC(
 182     HDC hdc,
 183     INT iSaveLevel)
 184 {
 185     PDC pdc;
 186
 187     DPRINT("NtGdiRestoreDC(%p, %d)\n", hdc, iSaveLevel);
 188
 189     /* Lock the original DC */
 190     pdc = DC_LockDc(hdc);
 191     if (!pdc)
 192     {
 193         EngSetLastError(ERROR_INVALID_HANDLE);
 194         return FALSE;
 195     }
 196
 197     ASSERT(pdc->dclevel.lSaveDepth > 0);
 198
 199     /* Negative values are relative to the stack top */
 200     if (iSaveLevel < 0)
 201         iSaveLevel = pdc->dclevel.lSaveDepth + iSaveLevel;
 202
 203     /* Check if we have a valid instance */
 204     if (iSaveLevel <= 0 || iSaveLevel >= pdc->dclevel.lSaveDepth)
 205     {
 206         DPRINT("Illegal save level, requested: %ld, current: %ld\n",
 207                iSaveLevel, pdc->dclevel.lSaveDepth);
 208         DC_UnlockDc(pdc);
 209         EngSetLastError(ERROR_INVALID_PARAMETER);
 210         return FALSE;
 211     }
 212
 213     /* Call the internal function */
 214     DC_vRestoreDC(pdc, iSaveLevel);
 215
 216     DC_UnlockDc(pdc);
 217
 218     DPRINT("Leave NtGdiRestoreDC\n");
 219     return TRUE;
 220 }
 221
 222
 223 INT
 224 APIENTRY
 225 NtGdiSaveDC(
 226     HDC hDC)
 227 {
 228     HDC hdcSave;
 229     PDC pdc, pdcSave;
 230     INT lSaveDepth;
 231
 232     DPRINT("NtGdiSaveDC(%p)\n", hDC);
 233
 234     /* Lock the original dc */
 235     pdc = DC_LockDc(hDC);
 236     if (pdc == NULL)
 237     {
 238         DPRINT("Could not lock DC\n");
 239         EngSetLastError(ERROR_INVALID_HANDLE);
 240         return 0;
 241     }
 242
 243     /* Allocate a new dc */
 244     pdcSave = DC_AllocDcWithHandle();
 245     if (pdcSave == NULL)
 246     {
 247         DPRINT("Could not allocate a new DC\n");
 248         DC_UnlockDc(pdc);
 249         return 0;
 250     }
 251     hdcSave = pdcSave->BaseObject.hHmgr;
 252
 253     InterlockedIncrement(&pdc->ppdev->cPdevRefs);
 254     DC_vInitDc(pdcSave, DCTYPE_MEMORY, pdc->ppdev);
 255
 256     /* Handle references here correctly */
 257 //    pdcSrc->dclevel.pSurface = NULL;
 258 //    pdcSrc->dclevel.pbrFill = NULL;
 259 //    pdcSrc->dclevel.pbrLine = NULL;
 260 //    pdcSrc->dclevel.ppal = NULL;
 261
 262     /* Make it a kernel handle
 263        (FIXME: windows handles this different, see wiki)*/
 264     GDIOBJ_SetOwnership(hdcSave, NULL);
 265
 266     /* Copy the current state */
 267     DC_vCopyState(pdc, pdcSave, TRUE);
 268
 269     /* Only memory DC's change their surface */
 270     if (pdc->dctype == DCTYPE_MEMORY)
 271         DC_vSelectSurface(pdcSave, pdc->dclevel.pSurface);
 272
 273     /* Copy path. FIXME: why this way? */
 274     pdcSave->dclevel.hPath = pdc->dclevel.hPath;
 275     pdcSave->dclevel.flPath = pdc->dclevel.flPath | DCPATH_SAVESTATE;
 276     if (pdcSave->dclevel.hPath) pdcSave->dclevel.flPath |= DCPATH_SAVE;
 277
 278     /* Set new dc as save dc */
 279     pdc->dclevel.hdcSave = hdcSave;
 280
 281     /* Increase save depth, return old value */
 282     lSaveDepth = pdc->dclevel.lSaveDepth++;
 283
 284     /* Cleanup and return */
 285     DC_UnlockDc(pdcSave);
 286     DC_UnlockDc(pdc);
 287
 288     DPRINT("Leave NtGdiSaveDC: %ld, hdcSave = %p\n", lSaveDepth, hdcSave);
 289     return lSaveDepth;
 290 }
 291