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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkShaper.h"
#include "SkStream.h"
#include "SkTextBlob.h"
#include "SkTypeface.h"
struct SkShaper::Impl {
sk_sp<SkTypeface> fTypeface;
};
SkShaper::SkShaper(sk_sp<SkTypeface> tf) : fImpl(new Impl) {
fImpl->fTypeface = tf ? std::move(tf) : SkTypeface::MakeDefault();
}
SkShaper::~SkShaper() {}
bool SkShaper::good() const { return true; }
SkScalar SkShaper::shape(SkTextBlobBuilder* builder,
const SkPaint& srcPaint,
const char* utf8text,
size_t textBytes,
SkPoint point) const {
SkPaint paint(srcPaint);
paint.setTypeface(fImpl->fTypeface);
paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
int glyphCount = paint.countText(utf8text, textBytes);
if (glyphCount <= 0) {
return 0;
}
SkRect bounds;
(void)paint.measureText(utf8text, textBytes, &bounds);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
const SkTextBlobBuilder::RunBuffer& runBuffer = builder->allocRunPosH(
paint, glyphCount, point.y(), &bounds);
paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
(void)paint.textToGlyphs(utf8text, textBytes, runBuffer.glyphs);
(void)paint.getTextWidths(utf8text, textBytes, runBuffer.pos);
SkScalar x = point.x();
for (int i = 0; i < glyphCount; ++i) {
SkScalar w = runBuffer.pos[i];
runBuffer.pos[i] = x;
x += w;
}
return (SkScalar)x;
}
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