dwrite: Implement stub for system IDWriteFontFallback.

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/dwrite/analyzer.c

@@ -182,6 +182,11 @@ const char *debugstr_sa_script(UINT16 script)
     return script < Script_LastId ? debugstr_an((char*)&dwritescripts_properties[script].props.isoScriptCode, 4): "not defined";
 }
 
+struct dwrite_fontfallback {
+    IDWriteFontFallback IDWriteFontFallback_iface;
+    IDWriteFactory2 *factory;
+};
+
 struct dwrite_numbersubstitution {
     IDWriteNumberSubstitution IDWriteNumberSubstitution_iface;
     LONG ref;
@@ -196,6 +201,11 @@ static inline struct dwrite_numbersubstitution *impl_from_IDWriteNumberSubstitut
     return CONTAINING_RECORD(iface, struct dwrite_numbersubstitution, IDWriteNumberSubstitution_iface);
 }
 
+static inline struct dwrite_fontfallback *impl_from_IDWriteFontFallback(IDWriteFontFallback *iface)
+{
+    return CONTAINING_RECORD(iface, struct dwrite_fontfallback, IDWriteFontFallback_iface);
+}
+
 static inline UINT32 decode_surrogate_pair(const WCHAR *str, UINT32 index, UINT32 end)
 {
     if (index < end-1 && IS_SURROGATE_PAIR(str[index], str[index+1])) {
@@ -1677,3 +1687,77 @@ HRESULT create_numbersubstitution(DWRITE_NUMBER_SUBSTITUTION_METHOD method, cons
     *ret = &substitution->IDWriteNumberSubstitution_iface;
     return S_OK;
 }
+
+/* IDWriteFontFallback */
+static HRESULT WINAPI fontfallback_QueryInterface(IDWriteFontFallback *iface, REFIID riid, void **obj)
+{
+    struct dwrite_fontfallback *fallback = impl_from_IDWriteFontFallback(iface);
+
+    TRACE("(%p)->(%s %p)\n", fallback, debugstr_guid(riid), obj);
+
+    if (IsEqualIID(riid, &IID_IDWriteFontFallback) || IsEqualIID(riid, &IID_IUnknown)) {
+        *obj = iface;
+        IDWriteFontFallback_AddRef(iface);
+        return S_OK;
+    }
+
+    *obj = NULL;
+    return E_NOINTERFACE;
+}
+
+static ULONG WINAPI fontfallback_AddRef(IDWriteFontFallback *iface)
+{
+    struct dwrite_fontfallback *fallback = impl_from_IDWriteFontFallback(iface);
+    TRACE("(%p)\n", fallback);
+    return IDWriteFactory2_AddRef(fallback->factory);
+}
+
+static ULONG WINAPI fontfallback_Release(IDWriteFontFallback *iface)
+{
+    struct dwrite_fontfallback *fallback = impl_from_IDWriteFontFallback(iface);
+    TRACE("(%p)\n", fallback);
+    return IDWriteFactory2_Release(fallback->factory);
+}
+
+static HRESULT WINAPI fontfallback_MapCharacters(IDWriteFontFallback *iface, IDWriteTextAnalysisSource *source,
+    UINT32 position, UINT32 length, IDWriteFontCollection *basecollection, const WCHAR *basefamily,
+    DWRITE_FONT_WEIGHT weight, DWRITE_FONT_STYLE style, DWRITE_FONT_STRETCH stretch, UINT32 *mapped_length,
+    IDWriteFont **mapped_font, FLOAT *scale)
+{
+    struct dwrite_fontfallback *fallback = impl_from_IDWriteFontFallback(iface);
+
+    FIXME("(%p)->(%p %u %u %p, %s, %u, %u, %u, %p, %p, %p): stub\n", fallback, source, position, length,
+        basecollection, debugstr_w(basefamily), weight, style, stretch, mapped_length, mapped_font, scale);
+
+    return E_NOTIMPL;
+}
+
+static const IDWriteFontFallbackVtbl fontfallbackvtbl = {
+    fontfallback_QueryInterface,
+    fontfallback_AddRef,
+    fontfallback_Release,
+    fontfallback_MapCharacters
+};
+
+HRESULT create_system_fontfallback(IDWriteFactory2 *factory, IDWriteFontFallback **ret)
+{
+    struct dwrite_fontfallback *fallback;
+
+    *ret = NULL;
+
+    fallback = heap_alloc(sizeof(*fallback));
+    if (!fallback)
+        return E_OUTOFMEMORY;
+
+    fallback->IDWriteFontFallback_iface.lpVtbl = &fontfallbackvtbl;
+    fallback->factory = factory;
+
+    *ret = &fallback->IDWriteFontFallback_iface;
+    return S_OK;
+}
+
+void release_system_fontfallback(IDWriteFontFallback *iface)
+{
+    struct dwrite_fontfallback *fallback = impl_from_IDWriteFontFallback(iface);
+    heap_free(fallback);
+}

dlls/dwrite/dwrite_private.h

@@ -142,6 +142,8 @@ extern HRESULT get_family_names_from_stream(IDWriteFontFileStream*,UINT32,DWRITE
 extern HRESULT create_colorglyphenum(FLOAT,FLOAT,const DWRITE_GLYPH_RUN*,const DWRITE_GLYPH_RUN_DESCRIPTION*,DWRITE_MEASURING_MODE,
     const DWRITE_MATRIX*,UINT32,IDWriteColorGlyphRunEnumerator**) DECLSPEC_HIDDEN;
 extern BOOL lb_is_newline_char(WCHAR) DECLSPEC_HIDDEN;
+extern HRESULT create_system_fontfallback(IDWriteFactory2*,IDWriteFontFallback**) DECLSPEC_HIDDEN;
+extern void    release_system_fontfallback(IDWriteFontFallback*) DECLSPEC_HIDDEN;
 
 /* Opentype font table functions */
 struct dwrite_font_props {

dlls/dwrite/main.c

@@ -512,6 +512,7 @@ struct dwritefactory {
     IDWriteFontCollection *system_collection;
     IDWriteFontCollection *eudc_collection;
     IDWriteGdiInterop *gdiinterop;
+    IDWriteFontFallback *fallback;
 
     IDWriteLocalFontFileLoader* localfontfileloader;
     struct list localfontfaces;
@@ -525,6 +526,12 @@ static inline struct dwritefactory *impl_from_IDWriteFactory2(IDWriteFactory2 *i
     return CONTAINING_RECORD(iface, struct dwritefactory, IDWriteFactory2_iface);
 }
 
+void notify_factory_fallback_removed(IDWriteFactory2 *iface)
+{
+    struct dwritefactory *factory = impl_from_IDWriteFactory2(iface);
+    factory->fallback = NULL;
+}
+
 static void release_fontface_cache(struct list *fontfaces)
 {
     struct fontfacecached *fontface, *fontface2;
@@ -567,6 +574,8 @@ static void release_dwritefactory(struct dwritefactory *factory)
         IDWriteFontCollection_Release(factory->eudc_collection);
     if (factory->gdiinterop)
         release_gdiinterop(factory->gdiinterop);
+    if (factory->fallback)
+        release_system_fontfallback(factory->fallback);
     heap_free(factory);
 }
 
@@ -1148,8 +1157,20 @@ static HRESULT WINAPI dwritefactory1_CreateCustomRenderingParams(IDWriteFactory2
 static HRESULT WINAPI dwritefactory2_GetSystemFontFallback(IDWriteFactory2 *iface, IDWriteFontFallback **fallback)
 {
     struct dwritefactory *This = impl_from_IDWriteFactory2(iface);
-    FIXME("(%p)->(%p): stub\n", This, fallback);
+
-    return E_NOTIMPL;
+    TRACE("(%p)->(%p)\n", This, fallback);
+
+    *fallback = NULL;
+
+    if (!This->fallback) {
+        HRESULT hr = create_system_fontfallback(iface, &This->fallback);
+        if (FAILED(hr))
+            return hr;
+    }
+
+    *fallback = This->fallback;
+    IDWriteFontFallback_AddRef(*fallback);
+    return S_OK;
 }
 
 static HRESULT WINAPI dwritefactory2_CreateFontFallbackBuilder(IDWriteFactory2 *iface, IDWriteFontFallbackBuilder **fallbackbuilder)
@@ -1282,6 +1303,7 @@ static void init_dwritefactory(struct dwritefactory *factory, DWRITE_FACTORY_TYP
     factory->system_collection = NULL;
     factory->eudc_collection = NULL;
     factory->gdiinterop = NULL;
+    factory->fallback = NULL;
 
     list_init(&factory->collection_loaders);
     list_init(&factory->file_loaders);

dlls/dwrite/tests/layout.c

@@ -2383,9 +2383,7 @@ if (0) /* crashes on native */
 
     fallback = NULL;
     hr = IDWriteFactory2_GetSystemFontFallback(factory2, &fallback);
-todo_wine
     ok(hr == S_OK, "got 0x%08x\n", hr);
-if (hr == S_OK) {
     ok(fallback != NULL, "got %p\n", fallback);
 
     hr = IDWriteTextFormat1_SetFontFallback(format1, fallback);
@@ -2405,7 +2403,6 @@ if (hr == S_OK) {
     ok(fallback2 == NULL, "got %p\n", fallback2);
 
     IDWriteFontFallback_Release(fallback);
-}
     IDWriteTextFormat1_Release(format1);
     IDWriteTextLayout2_Release(layout2);
     IDWriteFactory_Release(factory);
@@ -4248,9 +4245,7 @@ static void test_MapCharacters(void)
 
     fallback = NULL;
     hr = IDWriteFactory2_GetSystemFontFallback(factory2, &fallback);
-todo_wine
     ok(hr == S_OK, "got 0x%08x\n", hr);
-if (hr == S_OK) {
     ok(fallback != NULL, "got %p\n", fallback);
 
     mappedlength = 1;
@@ -4258,11 +4253,12 @@ if (hr == S_OK) {
     font = (void*)0xdeadbeef;
     hr = IDWriteFontFallback_MapCharacters(fallback, NULL, 0, 0, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == E_INVALIDARG, "got 0x%08x\n", hr);
     ok(mappedlength == 0, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font == NULL, "got %p\n", font);
-
+}
     /* zero length source */
     g_source = strW;
     mappedlength = 1;
@@ -4270,21 +4266,25 @@ if (hr == S_OK) {
     font = (void*)0xdeadbeef;
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 0, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(mappedlength == 0, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font == NULL, "got %p\n", font);
-
+}
     g_source = strW;
     mappedlength = 0;
     scale = 0.0f;
     font = NULL;
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 1, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(mappedlength == 1, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font != NULL, "got %p\n", font);
+}
+if (font)
     IDWriteFont_Release(font);
 
     /* same latin text, full length */
@@ -4294,10 +4294,13 @@ if (hr == S_OK) {
     font = NULL;
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 3, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(mappedlength == 3, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font != NULL, "got %p\n", font);
+}
+if (font)
     IDWriteFont_Release(font);
 
     /* string 'a\x3058b' */
@@ -4307,10 +4310,13 @@ if (hr == S_OK) {
     font = NULL;
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 3, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(mappedlength == 1, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font != NULL, "got %p\n", font);
+}
+if (font)
     IDWriteFont_Release(font);
 
     g_source = str2W;
@@ -4319,11 +4325,13 @@ if (hr == S_OK) {
     font = NULL;
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 1, 2, NULL, NULL, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(mappedlength == 1, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font != NULL, "got %p\n", font);
-
+}
+if (font) {
     /* font returned for Hiragana character, check if it supports Latin too */
     exists = FALSE;
     hr = IDWriteFont_HasCharacter(font, 'b', &exists);
@@ -4331,7 +4339,7 @@ if (hr == S_OK) {
     ok(exists, "got %d\n", exists);
 
     IDWriteFont_Release(font);
-
+}
     /* Try with explicit collection, Tahoma will be forced. */
     /* 1. Latin part */
     g_source = str2W;
@@ -4340,11 +4348,14 @@ if (hr == S_OK) {
     font = NULL;
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 0, 3, &fallbackcollection, g_blahfontW, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(mappedlength == 1, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font != NULL, "got %p\n", font);
+}
 
+if (font) {
     exists = FALSE;
     hr = IDWriteFont_GetInformationalStrings(font, DWRITE_INFORMATIONAL_STRING_WIN32_FAMILY_NAMES, &strings, &exists);
     ok(hr == S_OK && exists, "got 0x%08x, exists %d\n", hr, exists);
@@ -4354,7 +4365,7 @@ if (hr == S_OK) {
     IDWriteLocalizedStrings_Release(strings);
 
     IDWriteFont_Release(font);
-
+}
     /* 2. Hiragana character, force Tahoma font does not support Japanese */
     g_source = str2W;
     mappedlength = 0;
@@ -4362,11 +4373,14 @@ if (hr == S_OK) {
     font = NULL;
     hr = IDWriteFontFallback_MapCharacters(fallback, &analysissource, 1, 1, &fallbackcollection, g_blahfontW, DWRITE_FONT_WEIGHT_NORMAL,
         DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, &mappedlength, &font, &scale);
+todo_wine {
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(mappedlength == 1, "got %u\n", mappedlength);
     ok(scale == 1.0f, "got %f\n", scale);
     ok(font != NULL, "got %p\n", font);
+}
 
+if (font) {
     exists = FALSE;
     hr = IDWriteFont_GetInformationalStrings(font, DWRITE_INFORMATIONAL_STRING_WIN32_FAMILY_NAMES, &strings, &exists);
     ok(hr == S_OK && exists, "got 0x%08x, exists %d\n", hr, exists);
@@ -4376,8 +4390,8 @@ if (hr == S_OK) {
     IDWriteLocalizedStrings_Release(strings);
 
     IDWriteFont_Release(font);
-    IDWriteFontFallback_Release(fallback);
 }
+    IDWriteFontFallback_Release(fallback);
     IDWriteFactory2_Release(factory2);
 }