win32ss/gdi/ntgdi/dcstate.c

   1 /*
   2  * COPYRIGHT:         See COPYING in the top level directory
   3  * PROJECT:           ReactOS Win32k subsystem
   4  * PURPOSE:           Functions for saving and restoring dc states
   5  * FILE:              subsystems/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_ |= (DIRTY_FILL|DIRTY_LINE|DIRTY_TEXT|DIRTY_BACKGROUND|DIRTY_CHARSET|DC_ICM_NOT_CALIBRATED|DC_ICM_NOT_SET); // 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)
  77     {
  78         DC_vCopyState(defaultDCstate, dc, FALSE);
  79         /* Update the brushes now, because they reference some objects (the DC palette)
  80          * Which belong to the current process, and this DC might be used for another process
  81          * after being cleaned up (for GetDC(0) for instance) */
  82         DC_vUpdateFillBrush(dc);
  83         DC_vUpdateBackgroundBrush(dc);
  84         DC_vUpdateLineBrush(dc);
  85         DC_vUpdateTextBrush(dc);
  86     }
  87
  88     DC_UnlockDc(dc);
  89
  90     return TRUE;
  91 }
  92
  93
  94 BOOL
  95 APIENTRY
  96 NtGdiResetDC(
  97     IN HDC hdc,
  98     IN LPDEVMODEW pdm,
  99     OUT PBOOL pbBanding,
 100     IN OPTIONAL VOID *pDriverInfo2,
 101     OUT VOID *ppUMdhpdev)
 102 {
 103     UNIMPLEMENTED;
 104     return 0;
 105 }
 106
 107
 108 VOID
 109 NTAPI
 110 DC_vRestoreDC(
 111     IN PDC pdc,
 112     INT iSaveLevel)
 113 {
 114     HDC hdcSave;
 115     PDC pdcSave;
 116
 117     ASSERT(iSaveLevel > 0);
 118     DPRINT("DC_vRestoreDC(%p, %ld)\n", pdc->BaseObject.hHmgr, iSaveLevel);
 119
 120     /* Loop the save levels */
 121     while (pdc->dclevel.lSaveDepth > iSaveLevel)
 122     {
 123         hdcSave = pdc->dclevel.hdcSave;
 124         DPRINT("RestoreDC = %p\n", hdcSave);
 125
 126         /* Set us as the owner */
 127         if (!GreSetObjectOwner(hdcSave, GDI_OBJ_HMGR_POWNED))
 128         {
 129             /* Could not get ownership. That's bad! */
 130             DPRINT1("Could not get ownership of saved DC (%p) for hdc %p!\n",
 131                     hdcSave, pdc->BaseObject.hHmgr);
 132             return;// FALSE;
 133         }
 134
 135         /* Lock the saved dc */
 136         pdcSave = DC_LockDc(hdcSave);
 137         if (!pdcSave)
 138         {
 139             /* WTF? Internal error! */
 140             DPRINT1("Could not lock the saved DC (%p) for dc %p!\n",
 141                     hdcSave, pdc->BaseObject.hHmgr);
 142             return;// FALSE;
 143         }
 144
 145         /* Remove the saved dc from the queue */
 146         pdc->dclevel.hdcSave = pdcSave->dclevel.hdcSave;
 147
 148         /* Decrement save level */
 149         pdc->dclevel.lSaveDepth--;
 150
 151         /* Is this the state we want? */
 152         if (pdc->dclevel.lSaveDepth == iSaveLevel)
 153         {
 154             /* Copy the state back */
 155             DC_vCopyState(pdcSave, pdc, FALSE);
 156
 157             /* Only memory DC's change their surface */
 158             if (pdc->dctype == DCTYPE_MEMORY)
 159                 DC_vSelectSurface(pdc, pdcSave->dclevel.pSurface);
 160
 161             // Restore Path by removing it, if the Save flag is set.
 162             // BeginPath will takecare of the rest.
 163             if (pdc->dclevel.hPath && pdc->dclevel.flPath & DCPATH_SAVE)
 164             {
 165                 PATH_Delete(pdc->dclevel.hPath);
 166                 pdc->dclevel.hPath = 0;
 167                 pdc->dclevel.flPath &= ~DCPATH_SAVE;
 168             }
 169         }
 170
 171         /* Prevent save dc from being restored */
 172         pdcSave->dclevel.lSaveDepth = 1;
 173
 174         /* Unlock it */
 175         DC_UnlockDc(pdcSave);
 176         /* Delete the saved dc */
 177         GreDeleteObject(hdcSave);
 178     }
 179
 180     DPRINT("Leave DC_vRestoreDC()\n");
 181 }
 182
 183
 184
 185 BOOL
 186 APIENTRY
 187 NtGdiRestoreDC(
 188     HDC hdc,
 189     INT iSaveLevel)
 190 {
 191     PDC pdc;
 192
 193     DPRINT("NtGdiRestoreDC(%p, %d)\n", hdc, iSaveLevel);
 194
 195     /* Lock the original DC */
 196     pdc = DC_LockDc(hdc);
 197     if (!pdc)
 198     {
 199         EngSetLastError(ERROR_INVALID_HANDLE);
 200         return FALSE;
 201     }
 202
 203     ASSERT(pdc->dclevel.lSaveDepth > 0);
 204
 205     /* Negative values are relative to the stack top */
 206     if (iSaveLevel < 0)
 207         iSaveLevel = pdc->dclevel.lSaveDepth + iSaveLevel;
 208
 209     /* Check if we have a valid instance */
 210     if (iSaveLevel <= 0 || iSaveLevel >= pdc->dclevel.lSaveDepth)
 211     {
 212         DPRINT("Illegal save level, requested: %ld, current: %ld\n",
 213                iSaveLevel, pdc->dclevel.lSaveDepth);
 214         DC_UnlockDc(pdc);
 215         EngSetLastError(ERROR_INVALID_PARAMETER);
 216         return FALSE;
 217     }
 218
 219     /* Call the internal function */
 220     DC_vRestoreDC(pdc, iSaveLevel);
 221
 222     DC_UnlockDc(pdc);
 223
 224     DPRINT("Leave NtGdiRestoreDC\n");
 225     return TRUE;
 226 }
 227
 228
 229 INT
 230 APIENTRY
 231 NtGdiSaveDC(
 232     HDC hDC)
 233 {
 234     HDC hdcSave;
 235     PDC pdc, pdcSave;
 236     INT lSaveDepth;
 237
 238     DPRINT("NtGdiSaveDC(%p)\n", hDC);
 239
 240     /* Lock the original dc */
 241     pdc = DC_LockDc(hDC);
 242     if (pdc == NULL)
 243     {
 244         DPRINT("Could not lock DC\n");
 245         EngSetLastError(ERROR_INVALID_HANDLE);
 246         return 0;
 247     }
 248
 249     /* Allocate a new dc */
 250     pdcSave = DC_AllocDcWithHandle();
 251     if (pdcSave == NULL)
 252     {
 253         DPRINT("Could not allocate a new DC\n");
 254         DC_UnlockDc(pdc);
 255         return 0;
 256     }
 257     hdcSave = pdcSave->BaseObject.hHmgr;
 258
 259     InterlockedIncrement(&pdc->ppdev->cPdevRefs);
 260     DC_vInitDc(pdcSave, DCTYPE_MEMORY, pdc->ppdev);
 261
 262     /* Handle references here correctly */
 263       //pdcSrc->dclevel.pSurface = NULL;
 264       //pdcSrc->dclevel.pbrFill = NULL;
 265       //pdcSrc->dclevel.pbrLine = NULL;
 266       //pdcSrc->dclevel.ppal = NULL;
 267
 268     /* Make it a kernel handle
 269        (FIXME: Windows handles this differently, see Wiki) */
 270     GDIOBJ_vSetObjectOwner(&pdcSave->BaseObject, GDI_OBJ_HMGR_PUBLIC);
 271
 272     /* Copy the current state */
 273     DC_vCopyState(pdc, pdcSave, TRUE);
 274
 275     /* Only memory DC's change their surface */
 276     if (pdc->dctype == DCTYPE_MEMORY)
 277         DC_vSelectSurface(pdcSave, pdc->dclevel.pSurface);
 278
 279     /* Copy path */
 280     /* FIXME: Why this way? */
 281     pdcSave->dclevel.hPath = pdc->dclevel.hPath;
 282     pdcSave->dclevel.flPath = pdc->dclevel.flPath | DCPATH_SAVESTATE;
 283     if (pdcSave->dclevel.hPath) pdcSave->dclevel.flPath |= DCPATH_SAVE;
 284
 285     /* Set new dc as save dc */
 286     pdc->dclevel.hdcSave = hdcSave;
 287
 288     /* Increase save depth, return old value */
 289     lSaveDepth = pdc->dclevel.lSaveDepth++;
 290
 291     /* Cleanup and return */
 292     DC_UnlockDc(pdcSave);
 293     DC_UnlockDc(pdc);
 294
 295     DPRINT("Leave NtGdiSaveDC: %ld, hdcSave = %p\n", lSaveDepth, hdcSave);
 296     return lSaveDepth;
 297 }
 298
 299 /* EOF */