[PATCH v4 2/2] gdi32: Allow font linking for runs with missing glyphs.

[Ziqing Hui]

From: Ziqing Hui <[e-mail]>

---
 dlls/gdi32/tests/font.c |  1 -
 dlls/gdi32/text.c       | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/dlls/gdi32/tests/font.c b/dlls/gdi32/tests/font.c
index ac8c0faead6..b54be061077 100644
--- a/dlls/gdi32/tests/font.c
+++ b/dlls/gdi32/tests/font.c
@@ -7085,7 +7085,6 @@ static void test_textout_missing_glyph(void)
     glyph_bitmap = create_textout_bitmap(hdc, &bmi, &rect,
             (const WCHAR *)glyphs, ARRAY_SIZE(glyphs), ETO_GLYPH_INDEX, &glyph_bits);
 
-    todo_wine
     ok(memcmp(text_bits, glyph_bits, rect.right * rect.bottom * 4),
             "Missing glyph text unexpectedly matched default glyph output.\n");
 
diff --git a/dlls/gdi32/text.c b/dlls/gdi32/text.c
index 0b58abe8ce1..c89dd3fe25d 100644
--- a/dlls/gdi32/text.c
+++ b/dlls/gdi32/text.c
@@ -337,6 +337,35 @@ static void BidiLines(int baselevel, LPWSTR pszOutLine, LPCWSTR pszLine, const W
     HeapFree(GetProcessHeap(), 0, run);
 }
 
+static BOOL run_needs_font_linking(HDC hdc, const WCHAR *str, int count)
+{
+    BOOL ret = FALSE;
+    WORD *glyphs;
+    int i;
+
+    if (!hdc)
+        return FALSE;
+
+    if (!(glyphs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*glyphs))))
+        return FALSE;
+
+    if (NtGdiGetGlyphIndicesW(hdc, str, count, glyphs, GGI_MARK_NONEXISTING_GLYPHS) != GDI_ERROR)
+    {
+        for (i = 0; i < count; ++i)
+        {
+            /* Ignore control characters when checking for missing glyphs. */
+            if (glyphs[i] == 0xffff && str[i] >= 32)
+            {
+                ret = TRUE;
+                break;
+            }
+        }
+    }
+
+    HeapFree(GetProcessHeap(), 0, glyphs);
+    return ret;
+}
+
 /*************************************************************
  *    BIDI_Reorder
  *
@@ -647,6 +676,14 @@ static BOOL BIDI_Reorder( HDC hDC,               /* [in] Display DC */
                     HeapFree(GetProcessHeap(), 0, *lpGlyphs);
                     *lpGlyphs = NULL;
                 }
+                else if (run_needs_font_linking(hDC, text, cChars))
+                {
+                    TRACE("Shaped run needs font linking\n");
+                    j = nItems;
+                    doGlyphs = FALSE;
+                    HeapFree(GetProcessHeap(), 0, *lpGlyphs);
+                    *lpGlyphs = NULL;
+                }
                 else
                 {
                     WORD *new_glyphs;
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/11232