Implement onMatchFamilyStyleCharacter for DirectWrite.
Review URL: https://codereview.chromium.org/946603002
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bungeman
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@ -16,6 +16,7 @@
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#include "SkTypefaceCache.h"
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#include "SkTypeface_win_dw.h"
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#include "SkTypes.h"
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#include "SkUtils.h"
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#include <dwrite.h>
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@ -298,6 +299,7 @@ private:
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mutable SkTypefaceCache fTFCache;
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friend class SkFontStyleSet_DirectWrite;
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friend class FontFallbackRenderer;
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};
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class SkFontStyleSet_DirectWrite : public SkFontStyleSet {
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@ -487,11 +489,204 @@ SkTypeface* SkFontMgr_DirectWrite::onMatchFamilyStyle(const char familyName[],
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return sset->matchStyle(fontstyle);
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}
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class FontFallbackRenderer : public IDWriteTextRenderer {
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public:
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FontFallbackRenderer(const SkFontMgr_DirectWrite* outer, UINT32 character)
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: fRefCount(1), fOuter(SkSafeRef(outer)), fCharacter(character), fResolvedTypeface(NULL) {
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}
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virtual ~FontFallbackRenderer() { }
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// IDWriteTextRenderer methods
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virtual HRESULT STDMETHODCALLTYPE DrawGlyphRun(
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void* clientDrawingContext,
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FLOAT baselineOriginX,
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FLOAT baselineOriginY,
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DWRITE_MEASURING_MODE measuringMode,
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DWRITE_GLYPH_RUN const* glyphRun,
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DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
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IUnknown* clientDrawingEffect) SK_OVERRIDE
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{
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SkTScopedComPtr<IDWriteFont> font;
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HRM(fOuter->fFontCollection->GetFontFromFontFace(glyphRun->fontFace, &font),
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"Could not get font from font face.");
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// It is possible that the font passed does not actually have the requested character,
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// due to no font being found and getting the fallback font.
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// Check that the font actually contains the requested character.
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BOOL exists;
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HRM(font->HasCharacter(fCharacter, &exists), "Could not find character.");
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if (exists) {
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SkTScopedComPtr<IDWriteFontFamily> fontFamily;
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HRM(font->GetFontFamily(&fontFamily), "Could not get family.");
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fResolvedTypeface = fOuter->createTypefaceFromDWriteFont(glyphRun->fontFace,
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font.get(),
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fontFamily.get());
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}
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return S_OK;
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}
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virtual HRESULT STDMETHODCALLTYPE DrawUnderline(
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void* clientDrawingContext,
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FLOAT baselineOriginX,
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FLOAT baselineOriginY,
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DWRITE_UNDERLINE const* underline,
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IUnknown* clientDrawingEffect) SK_OVERRIDE
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{ return E_NOTIMPL; }
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virtual HRESULT STDMETHODCALLTYPE DrawStrikethrough(
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void* clientDrawingContext,
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FLOAT baselineOriginX,
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FLOAT baselineOriginY,
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DWRITE_STRIKETHROUGH const* strikethrough,
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IUnknown* clientDrawingEffect) SK_OVERRIDE
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{ return E_NOTIMPL; }
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virtual HRESULT STDMETHODCALLTYPE DrawInlineObject(
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void* clientDrawingContext,
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FLOAT originX,
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FLOAT originY,
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IDWriteInlineObject* inlineObject,
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BOOL isSideways,
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BOOL isRightToLeft,
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IUnknown* clientDrawingEffect) SK_OVERRIDE
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{ return E_NOTIMPL; }
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// IDWritePixelSnapping methods
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virtual HRESULT STDMETHODCALLTYPE IsPixelSnappingDisabled(
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void* clientDrawingContext,
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BOOL* isDisabled) SK_OVERRIDE
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{
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*isDisabled = FALSE;
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return S_OK;
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}
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virtual HRESULT STDMETHODCALLTYPE GetCurrentTransform(
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void* clientDrawingContext,
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DWRITE_MATRIX* transform) SK_OVERRIDE
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{
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const DWRITE_MATRIX ident = { 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 };
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*transform = ident;
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return S_OK;
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}
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virtual HRESULT STDMETHODCALLTYPE GetPixelsPerDip(
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void* clientDrawingContext,
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FLOAT* pixelsPerDip) SK_OVERRIDE
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{
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*pixelsPerDip = 1.0f;
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return S_OK;
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}
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// IUnknown methods
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ULONG STDMETHODCALLTYPE AddRef() SK_OVERRIDE {
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return InterlockedIncrement(&fRefCount);
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}
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ULONG STDMETHODCALLTYPE Release() SK_OVERRIDE {
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ULONG newCount = InterlockedDecrement(&fRefCount);
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if (0 == newCount) {
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delete this;
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}
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return newCount;
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}
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(
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IID const& riid, void** ppvObject) SK_OVERRIDE
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{
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if (__uuidof(IUnknown) == riid ||
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__uuidof(IDWritePixelSnapping) == riid ||
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__uuidof(IDWriteTextRenderer) == riid)
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{
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*ppvObject = this;
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this->AddRef();
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return S_OK;
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}
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*ppvObject = NULL;
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return E_FAIL;
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}
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SkTypeface* FallbackTypeface() { return fResolvedTypeface; }
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protected:
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ULONG fRefCount;
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SkAutoTUnref<const SkFontMgr_DirectWrite> fOuter;
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UINT32 fCharacter;
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SkTypeface* fResolvedTypeface;
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};
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static HRESULT getDefaultFontFamilyName(SkSMallocWCHAR* name) {
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NONCLIENTMETRICSW metrics;
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metrics.cbSize = sizeof(metrics);
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if (0 == SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, sizeof(metrics), &metrics, 0)) {
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return E_UNEXPECTED;
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}
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size_t len = wcsnlen_s(metrics.lfMessageFont.lfFaceName, LF_FACESIZE) + 1;
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if (0 != wcsncpy_s(name->reset(len), len, metrics.lfMessageFont.lfFaceName, _TRUNCATE)) {
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return E_UNEXPECTED;
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}
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return S_OK;
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}
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SkTypeface* SkFontMgr_DirectWrite::onMatchFamilyStyleCharacter(const char familyName[],
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const SkFontStyle&,
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const SkFontStyle& style,
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const char* bcp47[], int bcp47Count,
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SkUnichar character) const {
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return NULL;
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SkUnichar character) const
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{
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// TODO: use IDWriteFactory2::GetSystemFontFallback when available.
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const DWriteStyle dwStyle(style);
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SkSMallocWCHAR dwFamilyName;
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if (NULL == familyName) {
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HRN(getDefaultFontFamilyName(&dwFamilyName));
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} else {
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HRN(sk_cstring_to_wchar(familyName, &dwFamilyName));
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}
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const SkSMallocWCHAR* dwBcp47;
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SkSMallocWCHAR dwBcp47Local;
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if (bcp47Count < 1) {
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dwBcp47 = &fLocaleName;
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} else {
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// TODO: support fallback stack.
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// TODO: DirectWrite supports 'zh-CN' or 'zh-Hans', but 'zh' misses completely
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// and may produce a Japanese font.
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HRN(sk_cstring_to_wchar(bcp47[bcp47Count - 1], &dwBcp47Local));
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dwBcp47 = &dwBcp47Local;
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}
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SkTScopedComPtr<IDWriteTextFormat> fallbackFormat;
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HRNM(fFactory->CreateTextFormat(dwFamilyName,
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fFontCollection.get(),
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dwStyle.fWeight,
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dwStyle.fSlant,
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dwStyle.fWidth,
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72.0f,
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*dwBcp47,
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&fallbackFormat),
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"Could not create text format.");
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WCHAR str[16];
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UINT32 strLen = static_cast<UINT32>(
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SkUTF16_FromUnichar(character, reinterpret_cast<uint16_t*>(str)));
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SkTScopedComPtr<IDWriteTextLayout> fallbackLayout;
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HRNM(fFactory->CreateTextLayout(str, strLen, fallbackFormat.get(),
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200.0f, 200.0f,
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&fallbackLayout),
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"Could not create text layout.");
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SkTScopedComPtr<FontFallbackRenderer> fontFallbackRenderer(
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new FontFallbackRenderer(this, character));
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HRNM(fallbackLayout->Draw(NULL, fontFallbackRenderer.get(), 50.0f, 50.0f),
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"Could not draw layout with renderer.");
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return fontFallbackRenderer->FallbackTypeface();
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}
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SkTypeface* SkFontMgr_DirectWrite::onMatchFaceStyle(const SkTypeface* familyMember,
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@ -21,27 +21,6 @@
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#include <dwrite.h>
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struct DWriteStyle {
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explicit DWriteStyle(const SkFontStyle& pattern) {
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switch (pattern.slant()) {
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case SkFontStyle::kUpright_Slant:
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fSlant = DWRITE_FONT_STYLE_NORMAL;
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break;
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case SkFontStyle::kItalic_Slant:
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fSlant = DWRITE_FONT_STYLE_ITALIC;
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break;
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default:
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SkASSERT(false);
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}
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fWeight = (DWRITE_FONT_WEIGHT)pattern.weight();
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fWidth = (DWRITE_FONT_STRETCH)pattern.width();
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}
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DWRITE_FONT_STYLE fSlant;
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DWRITE_FONT_WEIGHT fWeight;
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DWRITE_FONT_STRETCH fWidth;
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};
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class SK_API SkRemotableFontMgr_DirectWrite : public SkRemotableFontMgr {
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private:
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struct DataId {
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@ -9,6 +9,7 @@
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#define SkDWrite_DEFINED
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#include "SkTemplates.h"
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#include "SkFontStyle.h"
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#include <dwrite.h>
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#include <winsdkver.h>
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@ -80,4 +81,28 @@ public:
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const T* operator->() const { return reinterpret_cast<const T*>(fData); }
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};
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////////////////////////////////////////////////////////////////////////////////
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// Style conversion
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struct DWriteStyle {
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explicit DWriteStyle(const SkFontStyle& pattern) {
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switch (pattern.slant()) {
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case SkFontStyle::kUpright_Slant:
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fSlant = DWRITE_FONT_STYLE_NORMAL;
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break;
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case SkFontStyle::kItalic_Slant:
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fSlant = DWRITE_FONT_STYLE_ITALIC;
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break;
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default:
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SkASSERT(false);
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}
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fWeight = (DWRITE_FONT_WEIGHT)pattern.weight();
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fWidth = (DWRITE_FONT_STRETCH)pattern.width();
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}
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DWRITE_FONT_STYLE fSlant;
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DWRITE_FONT_WEIGHT fWeight;
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DWRITE_FONT_STRETCH fWidth;
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};
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#endif
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