Remove HarfBuzzNGFaceSkia which looks not used by anyone

        "android/graphics/GIFMovie.cpp",

        "android/graphics/GraphicBuffer.cpp",

        "android/graphics/Graphics.cpp",

        "android/graphics/HarfBuzzNGFaceSkia.cpp",

        "android/graphics/ImageDecoder.cpp",

        "android/graphics/Interpolator.cpp",

        "android/graphics/MaskFilter.cpp",

/*

 * Copyright (c) 2012 Google Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above

 * copyright notice, this list of conditions and the following disclaimer

 * in the documentation and/or other materials provided with the

 * distribution.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#define LOG_TAG "TextLayoutCache"

#include "HarfBuzzNGFaceSkia.h"

#include <stdlib.h>

#include <log/log.h>

#include <SkPaint.h>

#include <SkPath.h>

#include <SkPoint.h>

#include <SkRect.h>

#include <SkTypeface.h>

#include <hb.h>

namespace android {

static const bool kDebugGlyphs = false;

// Our implementation of the callbacks which Harfbuzz requires by using Skia

// calls. See the Harfbuzz source for references about what these callbacks do.

struct HarfBuzzFontData {

    explicit HarfBuzzFontData(SkPaint* paint) : m_paint(paint) { }

    SkPaint* m_paint;

};

static void SkiaGetGlyphWidthAndExtents(SkPaint* paint, hb_codepoint_t codepoint, hb_position_t* width, hb_glyph_extents_t* extents)

{

    ALOG_ASSERT(codepoint <= 0xFFFF);

    paint->setTextEncoding(kGlyphID_SkTextEncoding);

    SkScalar skWidth;

    SkRect skBounds;

    uint16_t glyph = codepoint;

    paint->getTextWidths(&glyph, sizeof(glyph), &skWidth, &skBounds);

    if (kDebugGlyphs) {

        ALOGD("returned glyph for %i: width = %f", codepoint, skWidth);

    }

    if (width)

        *width = SkScalarToHBFixed(skWidth);

    if (extents) {

        // Invert y-axis because Skia is y-grows-down but we set up harfbuzz to be y-grows-up.

        extents->x_bearing = SkScalarToHBFixed(skBounds.fLeft);

        extents->y_bearing = SkScalarToHBFixed(-skBounds.fTop);

        extents->width = SkScalarToHBFixed(skBounds.width());

        extents->height = SkScalarToHBFixed(-skBounds.height());

    }

}

static hb_bool_t harfbuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData)

{

    HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData);

    SkPaint* paint = hbFontData->m_paint;

    paint->setTextEncoding(kUTF32_SkTextEncoding);

    if (unicode > 0x10ffff) {

        unicode = 0xfffd;

    }

    SkUnichar unichar = unicode;

    uint16_t glyph16;

    paint->textToGlyphs(&unichar, sizeof(unichar), &glyph16);

    *glyph = glyph16;

    return !!*glyph;

}

static hb_position_t harfbuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData)

{

    HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData);

    hb_position_t advance = 0;

    SkiaGetGlyphWidthAndExtents(hbFontData->m_paint, glyph, &advance, 0);

    return advance;

}

static hb_bool_t harfbuzzGetGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData)

{

    // Just return true, following the way that Harfbuzz-FreeType

    // implementation does.

    return true;

}

static hb_bool_t harfbuzzGetGlyphExtents(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_glyph_extents_t* extents, void* userData)

{

    HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData);

    SkiaGetGlyphWidthAndExtents(hbFontData->m_paint, glyph, 0, extents);

    return true;

}

static hb_font_funcs_t* harfbuzzSkiaGetFontFuncs()

{

    static hb_font_funcs_t* harfbuzzSkiaFontFuncs = 0;

    // We don't set callback functions which we can't support.

    // Harfbuzz will use the fallback implementation if they aren't set.

    if (!harfbuzzSkiaFontFuncs) {

        harfbuzzSkiaFontFuncs = hb_font_funcs_create();

        hb_font_funcs_set_glyph_func(harfbuzzSkiaFontFuncs, harfbuzzGetGlyph, 0, 0);

        hb_font_funcs_set_glyph_h_advance_func(harfbuzzSkiaFontFuncs, harfbuzzGetGlyphHorizontalAdvance, 0, 0);

        hb_font_funcs_set_glyph_h_origin_func(harfbuzzSkiaFontFuncs, harfbuzzGetGlyphHorizontalOrigin, 0, 0);

        hb_font_funcs_set_glyph_extents_func(harfbuzzSkiaFontFuncs, harfbuzzGetGlyphExtents, 0, 0);

        hb_font_funcs_make_immutable(harfbuzzSkiaFontFuncs);

    }

    return harfbuzzSkiaFontFuncs;

}

hb_blob_t* harfbuzzSkiaReferenceTable(hb_face_t* face, hb_tag_t tag, void* userData)

{

    SkTypeface* typeface = reinterpret_cast<SkTypeface*>(userData);

    const size_t tableSize = typeface->getTableSize(tag);

    if (!tableSize)

        return 0;

    char* buffer = reinterpret_cast<char*>(malloc(tableSize));

    if (!buffer)

        return 0;

    size_t actualSize = typeface->getTableData(tag, 0, tableSize, buffer);

    if (tableSize != actualSize) {

        free(buffer);

        return 0;

    }

    return hb_blob_create(const_cast<char*>(buffer), tableSize,

                          HB_MEMORY_MODE_WRITABLE, buffer, free);

}

static void destroyHarfBuzzFontData(void* data) {

    delete (HarfBuzzFontData*)data;

}

hb_font_t* createFont(hb_face_t* face, SkPaint* paint, float sizeX, float sizeY) {

    hb_font_t* font = hb_font_create(face);

    // Note: this needs to be reworked when we do subpixels

    int x_ppem = floor(sizeX + 0.5);

    int y_ppem = floor(sizeY + 0.5);

    hb_font_set_ppem(font, x_ppem, y_ppem); 

    hb_font_set_scale(font, HBFloatToFixed(sizeX), HBFloatToFixed(sizeY));

    HarfBuzzFontData* data = new HarfBuzzFontData(paint);

    hb_font_set_funcs(font, harfbuzzSkiaGetFontFuncs(), data, destroyHarfBuzzFontData);

    return font;

}

} // namespace android