Module: wine Branch: master Commit: 41bbc007a468c3c91baa404e8d838b30868b9ee1 URL: http://source.winehq.org/git/wine.git/?a=commit;h=41bbc007a468c3c91baa404e8d...
Author: Huw Davies huw@codeweavers.com Date: Mon Jun 29 16:06:40 2009 +0100
gdi32: Store the original emf as a sequence of MFCOMMENT records.
---
dlls/gdi32/metafile.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 90 insertions(+), 1 deletions(-)
diff --git a/dlls/gdi32/metafile.c b/dlls/gdi32/metafile.c index 53ceceb..d0c55ce 100644 --- a/dlls/gdi32/metafile.c +++ b/dlls/gdi32/metafile.c @@ -1147,6 +1147,81 @@ UINT WINAPI GetMetaFileBitsEx( HMETAFILE hmf, UINT nSize, LPVOID buf ) return mfSize; }
+#include <pshpack2.h> +typedef struct +{ + DWORD magic; /* WMFC */ + WORD unk04; /* 1 */ + WORD unk06; /* 0 */ + WORD unk08; /* 0 */ + WORD unk0a; /* 1 */ + WORD checksum; + DWORD unk0e; /* 0 */ + DWORD num_chunks; + DWORD chunk_size; + DWORD remaining_size; + DWORD emf_size; + BYTE *emf_data; +} mf_comment_chunk; +#include <poppack.h> + +static const DWORD wmfc_magic = 0x43464d57; + +/****************************************************************** + * add_mf_comment + * + * Helper for GetWinMetaFileBits + * + * Add the MFCOMMENT record[s] which is essentially a copy + * of the original emf. + */ +static BOOL add_mf_comment(HDC hdc, HENHMETAFILE emf) +{ + DWORD size = GetEnhMetaFileBits(emf, 0, NULL), i; + BYTE *bits, *chunk_data; + mf_comment_chunk *chunk = NULL; + BOOL ret = FALSE; + static const DWORD max_chunk_size = 0x2000; + + if(!size) return FALSE; + chunk_data = bits = HeapAlloc(GetProcessHeap(), 0, size); + if(!bits) return FALSE; + if(!GetEnhMetaFileBits(emf, size, bits)) goto end; + + chunk = HeapAlloc(GetProcessHeap(), 0, max_chunk_size + FIELD_OFFSET(mf_comment_chunk, emf_data)); + if(!chunk) goto end; + + chunk->magic = wmfc_magic; + chunk->unk04 = 1; + chunk->unk06 = 0; + chunk->unk08 = 0; + chunk->unk0a = 1; + chunk->checksum = 0; /* We fixup the first chunk's checksum before returning from GetWinMetaFileBits */ + chunk->unk0e = 0; + chunk->num_chunks = (size + max_chunk_size - 1) / max_chunk_size; + chunk->chunk_size = max_chunk_size; + chunk->remaining_size = size; + chunk->emf_size = size; + + for(i = 0; i < chunk->num_chunks; i++) + { + if(i == chunk->num_chunks - 1) /* last chunk */ + chunk->chunk_size = chunk->remaining_size; + + chunk->remaining_size -= chunk->chunk_size; + memcpy(&chunk->emf_data, chunk_data, chunk->chunk_size); + chunk_data += chunk->chunk_size; + + if(!Escape(hdc, MFCOMMENT, chunk->chunk_size + FIELD_OFFSET(mf_comment_chunk, emf_data), (char*)chunk, NULL)) + goto end; + } + ret = TRUE; +end: + HeapFree(GetProcessHeap(), 0, chunk); + HeapFree(GetProcessHeap(), 0, bits); + return ret; +} + /****************************************************************** * GetWinMetaFileBits [GDI32.@] */ @@ -1156,7 +1231,7 @@ UINT WINAPI GetWinMetaFileBits(HENHMETAFILE hemf, { HDC hdcmf; HMETAFILE hmf; - UINT ret; + UINT ret, full_size; RECT rc;
GetClipBox(hdcRef, &rc); @@ -1165,11 +1240,25 @@ UINT WINAPI GetWinMetaFileBits(HENHMETAFILE hemf, fnMapMode, hdcRef, wine_dbgstr_rect(&rc));
hdcmf = CreateMetaFileW(NULL); + + add_mf_comment(hdcmf, hemf); + PlayEnhMetaFile(hdcmf, hemf, &rc); hmf = CloseMetaFile(hdcmf); + full_size = GetMetaFileBitsEx(hmf, 0, NULL); ret = GetMetaFileBitsEx(hmf, cbBuffer, lpbBuffer); DeleteMetaFile(hmf);
+ if(ret && ret == full_size && lpbBuffer) /* fixup checksum, but only if retrieving all of the bits */ + { + WORD checksum = 0; + METARECORD *comment_rec = (METARECORD*)(lpbBuffer + sizeof(METAHEADER)); + UINT i; + + for(i = 0; i < full_size / 2; i++) + checksum += ((WORD*)lpbBuffer)[i]; + comment_rec->rdParm[8] = ~checksum + 1; + } return ret; }