1 /* 2 * COPYRIGHT: See COPYING in the top level directory 3 * PROJECT: ReactOS kernel 4 * PURPOSE: Functions for creation and destruction of DCs 5 * FILE: win32ss/gdi/ntgdi/dcattr.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 #define GDIDCATTRFREE 8 15 16 typedef struct _GDI_DC_ATTR_FREELIST 17 { 18 LIST_ENTRY Entry; 19 DWORD nEntries; 20 PVOID AttrList[GDIDCATTRFREE]; 21 } GDI_DC_ATTR_FREELIST, *PGDI_DC_ATTR_FREELIST; 22 23 typedef struct _GDI_DC_ATTR_ENTRY 24 { 25 DC_ATTR Attr[GDIDCATTRFREE]; 26 } GDI_DC_ATTR_ENTRY, *PGDI_DC_ATTR_ENTRY; 27 28 29 BOOL 30 NTAPI DC_bAllocDcAttr(PDC pdc)31DC_bAllocDcAttr(PDC pdc) 32 { 33 PPROCESSINFO ppi; 34 PDC_ATTR pdcattr; 35 36 ppi = PsGetCurrentProcessWin32Process(); 37 ASSERT(ppi); 38 39 pdcattr = GdiPoolAllocate(ppi->pPoolDcAttr); 40 if (!pdcattr) 41 { 42 DPRINT1("Could not allocate DC attr\n"); 43 return FALSE; 44 } 45 46 /* Copy the content from the kernel mode dc attr */ 47 pdc->pdcattr = pdcattr; 48 *pdc->pdcattr = pdc->dcattr; 49 50 /* Set the object attribute in the handle table */ 51 GDIOBJ_vSetObjectAttr(&pdc->BaseObject, pdcattr); 52 53 DPRINT("DC_AllocDcAttr: pdc=%p, pdc->pdcattr=%p\n", pdc, pdc->pdcattr); 54 return TRUE; 55 } 56 57 VOID 58 NTAPI DC_vFreeDcAttr(PDC pdc)59DC_vFreeDcAttr(PDC pdc) 60 { 61 PPROCESSINFO ppi; 62 63 if (pdc->pdcattr == &pdc->dcattr) 64 { 65 // Internal DC object! 66 return; 67 } 68 69 /* Reset the object attribute in the handle table */ 70 GDIOBJ_vSetObjectAttr(&pdc->BaseObject, NULL); 71 72 ppi = PsGetCurrentProcessWin32Process(); 73 ASSERT(ppi); 74 GdiPoolFree(ppi->pPoolDcAttr, pdc->pdcattr); 75 76 /* Reset to kmode dcattr */ 77 pdc->pdcattr = &pdc->dcattr; 78 } 79