[PATCH] gdi32: Treat lpResults as optional in GetCharacterPlacement.

[Alex Henrie]

From: Michael Müller <michael at fds-team.de>

Signed-off-by: Alex Henrie <alexhenrie24 at gmail.com>
---
Patch from Wine Staging.
---
 dlls/gdi32/font.c       | 13 ++++++++++++-
 dlls/gdi32/tests/font.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/dlls/gdi32/font.c b/dlls/gdi32/font.c
index 41ec07d1e2..c4b7cfb141 100644
--- a/dlls/gdi32/font.c
+++ b/dlls/gdi32/font.c
@@ -3204,10 +3204,18 @@ GetCharacterPlacementA(HDC hdc, LPCSTR lpString, INT uCount,
     TRACE("%s, %d, %d, 0x%08x\n",
           debugstr_an(lpString, uCount), uCount, nMaxExtent, dwFlags);
 
+    lpStringW = FONT_mbtowc(hdc, lpString, uCount, &uCountW, &font_cp);
+
+    if (!lpResults)
+    {
+        ret = GetCharacterPlacementW(hdc, lpStringW, uCountW, nMaxExtent, NULL, dwFlags);
+        HeapFree(GetProcessHeap(), 0, lpStringW);
+        return ret;
+    }
+
     /* both structs are equal in size */
     memcpy(&resultsW, lpResults, sizeof(resultsW));
 
-    lpStringW = FONT_mbtowc(hdc, lpString, uCount, &uCountW, &font_cp);
     if(lpResults->lpOutString)
         resultsW.lpOutString = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR)*uCountW);
 
@@ -3262,6 +3270,9 @@ GetCharacterPlacementW(
     TRACE("%s, %d, %d, 0x%08x\n",
           debugstr_wn(lpString, uCount), uCount, nMaxExtent, dwFlags);
 
+    if (!lpResults)
+        return GetTextExtentPoint32W(hdc, lpString, uCount, &size) ? MAKELONG(size.cx, size.cy) : 0;
+
     TRACE("lStructSize=%d, lpOutString=%p, lpOrder=%p, lpDx=%p, lpCaretPos=%p\n"
           "lpClass=%p, lpGlyphs=%p, nGlyphs=%u, nMaxFit=%d\n",
           lpResults->lStructSize, lpResults->lpOutString, lpResults->lpOrder,
diff --git a/dlls/gdi32/tests/font.c b/dlls/gdi32/tests/font.c
index 8f5454b918..8a3f7a1efe 100644
--- a/dlls/gdi32/tests/font.c
+++ b/dlls/gdi32/tests/font.c
@@ -4939,6 +4939,37 @@ static void test_GetTextMetrics2(const char *fontname, int font_height)
     ok(ratio >= 90 && ratio <= 110, "expected width/height ratio 90-110, got %d\n", ratio);
 }
 
+static void test_GetCharacterPlacement(void)
+{
+    GCP_RESULTSA result;
+    DWORD size, size2;
+    WCHAR glyphs[20];
+    HDC hdc;
+
+    hdc = CreateCompatibleDC(0);
+    ok(!!hdc, "CreateCompatibleDC failed\n");
+
+    memset(&result, 0, sizeof(result));
+    result.lStructSize = sizeof(result);
+    result.lpGlyphs = glyphs;
+    result.nGlyphs  = 20;
+
+    size = GetCharacterPlacementA(hdc, "Wine Test", 9, 0, &result, 0);
+    ok(size, "GetCharacterPlacementA failed!\n");
+
+    size2 = GetCharacterPlacementA(hdc, "Wine Test", 9, 0, NULL, 0);
+    ok(size2, "GetCharacterPlacementA failed!\n");
+    ok(size == size2, "GetCharacterPlacementA returned different result: %u vs %u\n", size2, size);
+
+    size2 = GetCharacterPlacementA(hdc, "Wine Test", 9, 1024, NULL, GCP_REORDER);
+    ok(size2, "GetCharacterPlacementA failed!\n");
+    ok(size == size2, "GetCharacterPlacementA returned different result: %u vs %u\n", size2, size);
+
+    size = GetCharacterPlacementA(hdc, "Wine Test", 9, 1024, &result, GCP_REORDER);
+    ok(size, "GetCharacterPlacementA failed!\n");
+    ok(size == size2, "GetCharacterPlacementA returned different result: %u vs %u\n", size2, size);
+}
+
 static void test_CreateFontIndirect(void)
 {
     LOGFONTA lf, getobj_lf;
@@ -6875,6 +6906,7 @@ START_TEST(font)
     test_GetTextMetrics2("Arial", -11);
     test_GetTextMetrics2("Arial", -55);
     test_GetTextMetrics2("Arial", -110);
+    test_GetCharacterPlacement();
     test_CreateFontIndirect();
     test_CreateFontIndirectEx();
     test_oemcharset();
-- 
2.18.0