Remove dead code in ports/.

src/ports/SkHarfBuzzFont.cpp

-
-/*
- * Copyright 2009 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkHarfBuzzFont.h"
-#include "SkFontHost.h"
-#include "SkPaint.h"
-#include "SkPath.h"
-
-// HB_Fixed is a 26.6 fixed point format.
-static inline HB_Fixed SkScalarToHarfbuzzFixed(SkScalar value) {
-    return static_cast<HB_Fixed>(value * 64);
-}
-
-static HB_Bool stringToGlyphs(HB_Font hbFont, const HB_UChar16* characters,
-                              hb_uint32 length, HB_Glyph* glyphs,
-                              hb_uint32* glyphsSize, HB_Bool isRTL) {
-    SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
-    SkPaint paint;
-
-    paint.setTypeface(font->getTypeface());
-    paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
-    int numGlyphs = paint.textToGlyphs(characters, length * sizeof(uint16_t),
-                                       reinterpret_cast<uint16_t*>(glyphs));
-
-    // HB_Glyph is 32-bit, but Skia outputs only 16-bit numbers. So our
-    // |glyphs| array needs to be converted.
-    for (int i = numGlyphs - 1; i >= 0; --i) {
-        uint16_t value;
-        // We use a memcpy to avoid breaking strict aliasing rules.
-        memcpy(&value, reinterpret_cast<char*>(glyphs) + sizeof(uint16_t) * i, sizeof(uint16_t));
-        glyphs[i] = value;
-    }
-
-    *glyphsSize = numGlyphs;
-    return 1;
-}
-
-static void glyphsToAdvances(HB_Font hbFont, const HB_Glyph* glyphs,
-                         hb_uint32 numGlyphs, HB_Fixed* advances, int flags) {
-    SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
-    SkPaint paint;
-
-    font->setupPaint(&paint);
-    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
-
-    SkAutoMalloc storage(numGlyphs * (sizeof(SkScalar) + sizeof(uint16_t)));
-    SkScalar* scalarWidths = reinterpret_cast<SkScalar*>(storage.get());
-    uint16_t* glyphs16 = reinterpret_cast<uint16_t*>(scalarWidths + numGlyphs);
-
-    // convert HB 32bit glyphs to skia's 16bit
-    for (hb_uint32 i = 0; i < numGlyphs; ++i) {
-        glyphs16[i] = SkToU16(glyphs[i]);
-    }
-    paint.getTextWidths(glyphs16, numGlyphs * sizeof(uint16_t), scalarWidths);
-
-    for (hb_uint32 i = 0; i < numGlyphs; ++i) {
-        advances[i] = SkScalarToHarfbuzzFixed(scalarWidths[i]);
-    }
-}
-
-static HB_Bool canRender(HB_Font hbFont, const HB_UChar16* characters,
-                         hb_uint32 length) {
-    SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
-    SkPaint paint;
-
-    paint.setTypeface(font->getTypeface());
-    paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
-    return paint.containsText(characters, length * sizeof(uint16_t));
-}
-
-static HB_Error getOutlinePoint(HB_Font hbFont, HB_Glyph glyph, int flags,
-                                hb_uint32 index, HB_Fixed* xPos, HB_Fixed* yPos,
-                                hb_uint32* resultingNumPoints) {
-    SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
-    SkPaint paint;
-
-    font->setupPaint(&paint);
-    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
-    if (flags & HB_ShaperFlag_UseDesignMetrics) {
-        paint.setHinting(SkPaint::kNo_Hinting);
-    }
-
-    SkPath path;
-    uint16_t glyph16 = SkToU16(glyph);
-    paint.getTextPath(&glyph16, sizeof(glyph16), 0, 0, &path);
-    int numPoints = path.countPoints();
-    if (index >= numPoints) {
-        return HB_Err_Invalid_SubTable;
-    }
-
-    SkPoint pt = path.getPoint(index);
-    *xPos = SkScalarToHarfbuzzFixed(pt.fX);
-    *yPos = SkScalarToHarfbuzzFixed(pt.fY);
-    *resultingNumPoints = numPoints;
-
-    return HB_Err_Ok;
-}
-
-static void getGlyphMetrics(HB_Font hbFont, HB_Glyph glyph,
-                            HB_GlyphMetrics* metrics) {
-    SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
-    SkPaint paint;
-
-    font->setupPaint(&paint);
-    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
-
-    SkScalar width;
-    SkRect bounds;
-    uint16_t glyph16 = SkToU16(glyph);
-    paint.getTextWidths(&glyph16, sizeof(glyph16), &width, &bounds);
-
-    metrics->x = SkScalarToHarfbuzzFixed(bounds.fLeft);
-    metrics->y = SkScalarToHarfbuzzFixed(bounds.fTop);
-    metrics->width = SkScalarToHarfbuzzFixed(bounds.width());
-    metrics->height = SkScalarToHarfbuzzFixed(bounds.height());
-
-    metrics->xOffset = SkScalarToHarfbuzzFixed(width);
-    // We can't actually get the |y| correct because Skia doesn't export
-    // the vertical advance. However, nor we do ever render vertical text at
-    // the moment so it's unimportant.
-    metrics->yOffset = 0;
-}
-
-static HB_Fixed getFontMetric(HB_Font hbFont, HB_FontMetric metric)
-{
-    SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(hbFont->userData);
-    SkPaint paint;
-    SkPaint::FontMetrics skiaMetrics;
-
-    font->setupPaint(&paint);
-    paint.getFontMetrics(&skiaMetrics);
-
-    switch (metric) {
-    case HB_FontAscent:
-        return SkScalarToHarfbuzzFixed(-skiaMetrics.fAscent);
-    default:
-        SkDebugf("--- unknown harfbuzz metric enum %d\n", metric);
-        return 0;
-    }
-}
-
-static HB_FontClass gSkHarfBuzzFontClass = {
-    stringToGlyphs,
-    glyphsToAdvances,
-    canRender,
-    getOutlinePoint,
-    getGlyphMetrics,
-    getFontMetric,
-};
-
-const HB_FontClass& SkHarfBuzzFont::GetFontClass() {
-    return gSkHarfBuzzFontClass;
-}
-
-HB_Error SkHarfBuzzFont::GetFontTableFunc(void* voidface, const HB_Tag tag,
-                                          HB_Byte* buffer, HB_UInt* len) {
-    SkHarfBuzzFont* font = reinterpret_cast<SkHarfBuzzFont*>(voidface);
-    SkTypeface* typeface = font->getTypeface();
-
-    const size_t tableSize = typeface->getTableSize(tag);
-    if (!tableSize) {
-        return HB_Err_Invalid_Argument;
-    }
-    // If Harfbuzz specified a NULL buffer then it's asking for the size.
-    if (!buffer) {
-        *len = tableSize;
-        return HB_Err_Ok;
-    }
-
-    if (*len < tableSize) {
-        // is this right, or should we just copy less than the full table?
-        return HB_Err_Invalid_Argument;
-    }
-    typeface->getTableData(tag, 0, tableSize, buffer);
-    return HB_Err_Ok;
-}