dwrite: Add some mappings for Tahoma in the system fallback.

dlls/dwrite/analyzer.c

@@ -218,6 +218,10 @@ static const struct fallback_description
 }
 system_fallback_config[] =
 {
+    /* Latin, Combining Diacritical Marks */
+    { "0000-007F, 0080-00FF, 0100-017F, 0180-024F, "
+      "0250-02AF, 02B0-02FF, 0300-036F", L"Tahoma" },
+
     { "3000-30FF, 31F0-31FF, 4E00-9FFF", L"Meiryo" },
 };
 

dlls/dwrite/layout.c

@@ -725,7 +725,7 @@ static HRESULT layout_resolve_fonts(struct dwrite_textlayout *layout)
                 goto fatal;
             }
 
-            if (!mapped_length)
+            if (!font)
             {
                 if (FAILED(create_matching_font(range->collection, range->fontfamily, range->weight, range->style,
                         range->stretch, &IID_IDWriteFont3, (void **)&font)))

dlls/dwrite/tests/layout.c

@@ -4640,14 +4640,12 @@ static void test_MapCharacters(void)
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 1, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
     ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
-    todo_wine
     ok(mappedlength == 1, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
-    todo_wine
     ok(font != NULL, "got %p\n", font);
-if (font) {
-    IDWriteFont_Release(font);
-}
+    if (font)
+        IDWriteFont_Release(font);
+
     /* same Latin text, full length */
     g_source = L"abc";
     mappedlength = 0;
@@ -4656,15 +4654,13 @@ if (font) {
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 3, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
     ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
-    todo_wine
     ok(mappedlength == 3, "got %u\n", mappedlength);
 
     ok(scale == 1.0f, "got %f\n", scale);
-    todo_wine
     ok(font != NULL, "got %p\n", font);
-if (font) {
-    IDWriteFont_Release(font);
-}
+    if (font)
+        IDWriteFont_Release(font);
+
     /* string 'a\x3058b' */
     g_source = str2W;
     mappedlength = 0;
@@ -4673,14 +4669,12 @@ if (font) {
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 3, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
     ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
-    todo_wine
     ok(mappedlength == 1, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
-    todo_wine
     ok(font != NULL, "got %p\n", font);
-if (font) {
-    IDWriteFont_Release(font);
-}
+    if (font)
+        IDWriteFont_Release(font);
+
     g_source = str2W;
     mappedlength = 0;
     scale = 0.0f;