Piotr Caban : gdi32: Improve EMR_CREATEDIBPATTERNBRUSHPT playback.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 065fbd206df31a2fd975460d0da4923645c43049
URL:    https://gitlab.winehq.org/wine/wine/-/commit/065fbd206df31a2fd975460d0da4923...

Author: Piotr Caban 
Date:   Thu Mar  9 14:34:58 2023 +0100

gdi32: Improve EMR_CREATEDIBPATTERNBRUSHPT playback.

It makes the lbHatch data available after PlayEnhMetaFileRecord returns.

---

dlls/gdi32/enhmetafile.c    | 20 +++-----------------
 dlls/gdi32/tests/metafile.c | 39 +++++++++++++++++++++++++++++++++++++--
 2 files changed, 40 insertions(+), 19 deletions(-)

diff --git a/dlls/gdi32/enhmetafile.c b/dlls/gdi32/enhmetafile.c
index 336f2d389fd..178f7b0e132 100644
--- a/dlls/gdi32/enhmetafile.c
+++ b/dlls/gdi32/enhmetafile.c
@@ -1825,7 +1825,6 @@ BOOL WINAPI PlayEnhMetaFileRecord(
     case EMR_CREATEDIBPATTERNBRUSHPT:
       {
         const EMRCREATEDIBPATTERNBRUSHPT *lpCreate = (const EMRCREATEDIBPATTERNBRUSHPT *)mr;
-        LPVOID lpPackedStruct;

/* Check that offsets and data are contained within the record
          * (including checking for wrap-arounds).
@@ -1839,28 +1838,15 @@ BOOL WINAPI PlayEnhMetaFileRecord(
             break;
         }

-        /* This is a BITMAPINFO struct followed directly by bitmap bits */
-        lpPackedStruct = HeapAlloc( GetProcessHeap(), 0,
-                                    lpCreate->cbBmi + lpCreate->cbBits );
-        if(!lpPackedStruct)
+        if (lpCreate->offBmi + lpCreate->cbBmi != lpCreate->offBits)
         {
-            SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+            ERR("Invalid data in EMR_CREATEDIBPATTERNBRUSHPT record\n");
             break;
         }

-        /* Now pack this structure */
-        memcpy( lpPackedStruct,
-                ((const BYTE *)lpCreate) + lpCreate->offBmi,
-                lpCreate->cbBmi );
-        memcpy( ((BYTE*)lpPackedStruct) + lpCreate->cbBmi,
-                ((const BYTE *)lpCreate) + lpCreate->offBits,
-                lpCreate->cbBits );
-
         (handletable->objectHandle)[lpCreate->ihBrush] =
-           CreateDIBPatternBrushPt( lpPackedStruct,
+           CreateDIBPatternBrushPt( (const BYTE *)lpCreate + lpCreate->offBmi,
                                     (UINT)lpCreate->iUsage );
-
-        HeapFree(GetProcessHeap(), 0, lpPackedStruct);
         break;
       }

diff --git a/dlls/gdi32/tests/metafile.c b/dlls/gdi32/tests/metafile.c
index 004ad98d949..2b7e53b2529 100644
--- a/dlls/gdi32/tests/metafile.c
+++ b/dlls/gdi32/tests/metafile.c
@@ -4183,6 +4183,38 @@ static void test_mf_PatternBrush(void)
     HeapFree (GetProcessHeap(), 0, orig_lb);
 }

+static int CALLBACK pattern_brush_emf_enum_proc(HDC hdc, HANDLETABLE *htable,
+        const ENHMETARECORD *rec, int n, LPARAM arg)
+{
+    LOGBRUSH brush;
+    BOOL ret;
+
+    switch (rec->iType)
+    {
+    case EMR_HEADER:
+    case EMR_SELECTOBJECT:
+    case EMR_EOF:
+    case EMR_CREATEMONOBRUSH:
+        return 1;
+    case EMR_CREATEDIBPATTERNBRUSHPT:
+        ok(!htable->objectHandle[2], "objectHandle[2] already used\n");
+        ret = PlayEnhMetaFileRecord(hdc, htable, rec, n);
+        ok(ret, "PlayEnhMetaFileRecord failed\n");
+        ok(htable->objectHandle[2] != NULL, "objectHandle[2] not created\n");
+
+        ret = GetObjectW(htable->objectHandle[2], sizeof(brush), &brush);
+        ok(ret, "GetObjectW failed\n");
+        ok(brush.lbStyle == BS_DIBPATTERN, "brush.lbStyle = %d\n", brush.lbStyle);
+        ok(brush.lbHatch > (ULONG_PTR)rec && brush.lbHatch < (ULONG_PTR)rec + rec->nSize,
+                "brush.lbHatch = %p, not in %p-%p range\n",
+                (void *)brush.lbHatch, rec, (const BYTE *)rec + rec->nSize);
+        return 1;
+    default:
+        ok(0, "unexpected record %lu\n", rec->iType);
+        return 0;
+    }
+}
+
 static void test_emf_pattern_brush(void)
 {
     char buffer[sizeof(BITMAPINFOHEADER) + (2 + 32 * 32 / 8) * sizeof(RGBQUAD)];
@@ -4237,8 +4269,6 @@ static void test_emf_pattern_brush(void)
         dump_emf_records(emf, "emf_pattern_brush");
     }

-    ret = DeleteEnhMetaFile(emf);
-    ok(ret, "DeleteMetaFile error %ld\n", GetLastError());
     ret = DeleteObject(bitmap_brush);
     ok(ret, "DeleteObject failed\n");
     ret = DeleteObject(dib_brush);
@@ -4246,6 +4276,11 @@ static void test_emf_pattern_brush(void)
     ret = DeleteObject((HBITMAP)orig_lb->lbHatch);
     ok(ret, "DeleteObject failed\n");
     HeapFree(GetProcessHeap(), 0, orig_lb);
+
+    ret = EnumEnhMetaFile(NULL, emf, pattern_brush_emf_enum_proc, NULL, NULL);
+    ok(ret, "EnumEnhMetaFile error %ld\n", GetLastError());
+    ret = DeleteEnhMetaFile(emf);
+    ok(ret, "DeleteMetaFile error %ld\n", GetLastError());
 }

static void test_mf_palette_brush(void)