52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
|
/*
|
||
|
|
* 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;
|
||
|
|
}
|