SkAdvancedTypefaceMetrics: getAdvanceData uses std::function

Reduce templatedness.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1955053002

Review-Url: https://codereview.chromium.org/1955053002

6 files changed, 58 insertions, 107 deletions

diff --git a/src/core/SkAdvancedTypefaceMetrics.cpp b/src/core/SkAdvancedTypefaceMetrics.cpp
index fab5f5e462..ae8fc861c3 100644
--- a/src/core/SkAdvancedTypefaceMetrics.cpp
+++ b/src/core/SkAdvancedTypefaceMetrics.cpp
@@ -9,24 +9,6 @@
 #include "SkAdvancedTypefaceMetrics.h"
 #include "SkTypes.h"
 
-#if defined(SK_BUILD_FOR_WIN)
-#include <dwrite.h>
-#endif
-
-// forward declare structs needed for getAdvanceData() template for freetype
-struct FT_FaceRec_;
-typedef struct FT_FaceRec_* FT_Face;
-
-#ifdef SK_BUILD_FOR_MAC
-#import <ApplicationServices/ApplicationServices.h>
-#endif
-
-#ifdef SK_BUILD_FOR_IOS
-#include <CoreText/CoreText.h>
-#include <CoreGraphics/CoreGraphics.h>
-#include <CoreFoundation/CoreFoundation.h>
-#endif
-
 SkAdvancedTypefaceMetrics::~SkAdvancedTypefaceMetrics() {}
 
 const int16_t kInvalidAdvance = SK_MinS16;
@@ -87,13 +69,11 @@ void SkAdvancedTypefaceMetrics::FinishRange(
     zeroWildcardsInRange(range);
 }
 
-template <typename FontHandle>
 void SkAdvancedTypefaceMetrics::setGlyphWidths(
-        FontHandle fontHandle,
         int num_glyphs,
         const uint32_t* subsetGlyphIDs,
         uint32_t subsetGlyphIDsLength,
-        bool (*getAdvance)(FontHandle fontHandle, int gId, int16_t* data)) {
+        SkAdvancedTypefaceMetrics::GetAdvance getAdvance) {
     // Assuming that on average, the ASCII representation of an advance plus
     // a space is 8 characters and the ASCII representation of a glyph id is 3
     // characters, then the following cut offs for using different range types
@@ -135,7 +115,7 @@ void SkAdvancedTypefaceMetrics::setGlyphWidths(
             if (!subsetGlyphIDs ||
                 (subsetIndex < subsetGlyphIDsLength &&
                  static_cast<uint32_t>(gId) == subsetGlyphIDs[subsetIndex])) {
-                SkAssertResult(getAdvance(fontHandle, gId, &advance));
+                SkAssertResult(getAdvance(gId, &advance));
                 ++subsetIndex;
             } else {
                 advance = kDontCareAdvance;
@@ -212,41 +192,3 @@ void SkAdvancedTypefaceMetrics::setGlyphWidths(
         fGlyphWidths.emplace_back(std::move(curRange));
     }
 }
-
-// Make AdvanceMetric template functions available for linking with typename
-// WidthRange and VerticalAdvanceRange.
-template void SkAdvancedTypefaceMetrics::setGlyphWidths(
-        FT_Face face,
-        int num_glyphs,
-        const uint32_t* subsetGlyphIDs,
-        uint32_t subsetGlyphIDsLength,
-        bool (*getAdvance)(FT_Face face, int gId, int16_t* data));
-
-#if defined(SK_BUILD_FOR_WIN)
-template void SkAdvancedTypefaceMetrics::setGlyphWidths(
-        HDC hdc,
-        int num_glyphs,
-        const uint32_t* subsetGlyphIDs,
-        uint32_t subsetGlyphIDsLength,
-        bool (*getAdvance)(HDC hdc, int gId, int16_t* data));
-template void SkAdvancedTypefaceMetrics::setGlyphWidths(
-        IDWriteFontFace* fontFace,
-        int num_glyphs,
-        const uint32_t* subsetGlyphIDs,
-        uint32_t subsetGlyphIDsLength,
-        bool (*getAdvance)(IDWriteFontFace* fontFace, int gId, int16_t* data));
-#elif defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
-template void SkAdvancedTypefaceMetrics::setGlyphWidths(
-        CTFontRef ctFont,
-        int num_glyphs,
-        const uint32_t* subsetGlyphIDs,
-        uint32_t subsetGlyphIDsLength,
-        bool (*getAdvance)(CTFontRef ctFont, int gId, int16_t* data));
-#endif
-// additional declaration needed for testing with a face of an unknown type
-template void SkAdvancedTypefaceMetrics::setGlyphWidths(
-        void* fontData,
-        int num_glyphs,
-        const uint32_t* subsetGlyphIDs,
-        uint32_t subsetGlyphIDsLength,
-        bool (*getAdvance)(void* fontData, int gId, int16_t* data));
diff --git a/src/core/SkAdvancedTypefaceMetrics.h b/src/core/SkAdvancedTypefaceMetrics.h
index 5e7e59331f..026aec26f4 100644
--- a/src/core/SkAdvancedTypefaceMetrics.h
+++ b/src/core/SkAdvancedTypefaceMetrics.h
@@ -55,14 +55,11 @@ public:
                              passes back advance data from the
                              typeface.  Returns false on failure.
     */
-    template <typename FontHandle>
-    void setGlyphWidths(FontHandle fontHandle,
-                        int num_glyphs,
+    typedef std::function<bool(int glyphId, int16_t* advanceData)> GetAdvance;
+    void setGlyphWidths(int num_glyphs,
                         const uint32_t* subsetGlyphIDs,
                         uint32_t subsetGlyphIDsLength,
-                        bool (*getAdvance)(FontHandle fontHandle,
-                                           int gId,
-                                           int16_t* data));
+                        GetAdvance getAdvance);
 
     SkString fFontName;
 
diff --git a/src/ports/SkFontHost_FreeType.cpp b/src/ports/SkFontHost_FreeType.cpp
index 30e5fb340f..4dc401c59a 100644
--- a/src/ports/SkFontHost_FreeType.cpp
+++ b/src/ports/SkFontHost_FreeType.cpp
@@ -432,16 +432,6 @@ static bool GetLetterCBox(FT_Face face, char letter, FT_BBox* bbox) {
     return true;
 }
 
-static bool getWidthAdvance(FT_Face face, int gId, int16_t* data) {
-    FT_Fixed advance = 0;
-    if (FT_Get_Advances(face, gId, 1, FT_LOAD_NO_SCALE, &advance)) {
-        return false;
-    }
-    SkASSERT(data);
-    *data = advance;
-    return true;
-}
-
 static void populate_glyph_to_unicode(FT_Face& face, SkTDArray<SkUnichar>* glyphToUnicode) {
     FT_Long numGlyphs = face->num_glyphs;
     glyphToUnicode->setCount(SkToInt(numGlyphs));
@@ -615,8 +605,19 @@ SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(
                     SkAdvancedTypefaceMetrics::WidthRange::kRange);
             info->fGlyphWidths.emplace_back(std::move(range));
         } else {
-            info->setGlyphWidths(face, face->num_glyphs, glyphIDs,
-                                 glyphIDsCount, &getWidthAdvance);
+            info->setGlyphWidths(
+                    face->num_glyphs, glyphIDs, glyphIDsCount,
+                    SkAdvancedTypefaceMetrics::GetAdvance(
+                            [face](int gId, int16_t* data) {
+                                FT_Fixed advance = 0;
+                                if (FT_Get_Advances(face, gId, 1,
+                                                    FT_LOAD_NO_SCALE, &advance)) {
+                                    return false;
+                                }
+                                SkASSERT(data);
+                                *data = advance;
+                                return true;
+                            }));
         }
     }
 
diff --git a/src/ports/SkFontHost_mac.cpp b/src/ports/SkFontHost_mac.cpp
index dc13331735..cff69b315c 100644
--- a/src/ports/SkFontHost_mac.cpp
+++ b/src/ports/SkFontHost_mac.cpp
@@ -1512,15 +1512,6 @@ static void populate_glyph_to_unicode(CTFontRef ctFont, CFIndex glyphCount,
     }
 }
 
-static bool getWidthAdvance(CTFontRef ctFont, int gId, int16_t* data) {
-    CGSize advance;
-    advance.width = 0;
-    CGGlyph glyph = gId;
-    CTFontGetAdvancesForGlyphs(ctFont, kCTFontHorizontalOrientation, &glyph, &advance, 1);
-    *data = sk_float_round2int(advance.width);
-    return true;
-}
-
 /** Assumes src and dst are not nullptr. */
 static void CFStringToSkString(CFStringRef src, SkString* dst) {
     // Reserve enough room for the worst-case string,
@@ -1625,8 +1616,20 @@ SkAdvancedTypefaceMetrics* SkTypeface_Mac::onGetAdvancedTypefaceMetrics(
                     &range, 0, SkAdvancedTypefaceMetrics::WidthRange::kDefault);
             info->fGlyphWidths.emplace_back(std::move(range));
         } else {
-            info->setGlyphWidths(ctFont.get(), SkToInt(glyphCount), glyphIDs,
-                                 glyphIDsCount, &getWidthAdvance);
+            CTFontRef borrowedCTFont = ctFont.get();
+            info->setGlyphWidths(
+                    SkToInt(glyphCount), glyphIDs, glyphIDsCount,
+                    SkAdvancedTypefaceMetrics::GetAdvance(
+                        [borrowedCTFont](int gId, int16_t* data) {
+                            CGSize advance;
+                            advance.width = 0;
+                            CGGlyph glyph = gId;
+                            CTFontGetAdvancesForGlyphs(
+                                    borrowedCTFont, kCTFontHorizontalOrientation,
+                                    &glyph, &advance, 1);
+                            *data = sk_float_round2int(advance.width);
+                            return true;
+                        }));
         }
     }
     return info;
diff --git a/src/ports/SkFontHost_win.cpp b/src/ports/SkFontHost_win.cpp
index 7c0a639b4b..898aa42309 100644
--- a/src/ports/SkFontHost_win.cpp
+++ b/src/ports/SkFontHost_win.cpp
@@ -1717,20 +1717,6 @@ void LogFontTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
     *isLocalStream = this->fSerializeAsStream;
 }
 
-static bool getWidthAdvance(HDC hdc, int gId, int16_t* advance) {
-    // Initialize the MAT2 structure to the identify transformation matrix.
-    static const MAT2 mat2 = {SkScalarToFIXED(1), SkScalarToFIXED(0),
-                        SkScalarToFIXED(0), SkScalarToFIXED(1)};
-    int flags = GGO_METRICS | GGO_GLYPH_INDEX;
-    GLYPHMETRICS gm;
-    if (GDI_ERROR == GetGlyphOutline(hdc, gId, flags, &gm, 0, nullptr, &mat2)) {
-        return false;
-    }
-    SkASSERT(advance);
-    *advance = gm.gmCellIncX;
-    return true;
-}
-
 SkAdvancedTypefaceMetrics* LogFontTypeface::onGetAdvancedTypefaceMetrics(
         PerGlyphInfo perGlyphInfo,
         const uint32_t* glyphIDs,
@@ -1839,8 +1825,25 @@ SkAdvancedTypefaceMetrics* LogFontTypeface::onGetAdvancedTypefaceMetrics(
                     &range, 0, SkAdvancedTypefaceMetrics::WidthRange::kDefault);
             info->fGlyphWidths.emplace_back(std::move(range));
         } else {
-            info->setGlyphWidths(hdc, glyphCount, glyphIDs,
-                                 glyphIDsCount, &getWidthAdvance);
+            info->setGlyphWidths(
+                    glyphCount, glyphIDs, glyphIDsCount,
+                    SkAdvancedTypefaceMetrics::GetAdvance(
+                            [hdc](int gId, int16_t* advance) {
+                                // Initialize the MAT2 structure to
+                                // the identify transformation matrix.
+                                static const MAT2 mat2 = {
+                                    SkScalarToFIXED(1), SkScalarToFIXED(0),
+                                    SkScalarToFIXED(0), SkScalarToFIXED(1)};
+                                int flags = GGO_METRICS | GGO_GLYPH_INDEX;
+                                GLYPHMETRICS gm;
+                                if (GDI_ERROR == GetGlyphOutline(
+                                            hdc, gId, flags, &gm, 0, nullptr, &mat2)) {
+                                    return false;
+                                }
+                                SkASSERT(advance);
+                                *advance = gm.gmCellIncX;
+                                return true;
+                            }));
         }
     }
 
diff --git a/src/ports/SkTypeface_win_dw.cpp b/src/ports/SkTypeface_win_dw.cpp
index de599d67e5..87fbcd2f6c 100644
--- a/src/ports/SkTypeface_win_dw.cpp
+++ b/src/ports/SkTypeface_win_dw.cpp
@@ -450,8 +450,13 @@ SkAdvancedTypefaceMetrics* DWriteFontTypeface::onGetAdvancedTypefaceMetrics(
                     &range, 0, SkAdvancedTypefaceMetrics::WidthRange::kDefault);
             info->fGlyphWidths.emplace_back(std::move(range));
         } else {
-            info->setGlyphWidths(fDWriteFontFace.get(), glyphCount, glyphIDs,
-                                 glyphIDsCount, getWidthAdvance);
+            IDWriteFontFace* borrowedFontFace = fDWriteFontFace.get();
+            info->setGlyphWidths(
+                    glyphCount, glyphIDs, glyphIDsCount,
+                    SkAdvancedTypefaceMetrics::GetAdvance(
+                            [borrowedFontFace](int gId, int16_t* data) {
+                                return getWidthAdvance(borrowedFontFace, gId, data);
+                            }));
         }
     }