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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Utilities for making Minikin work, especially from existing objects like
* SkPaint and so on.
**/
// TODO: does this really need to be separate from MinikinSkia?
#ifndef ANDROID_MINIKIN_UTILS_H
#define ANDROID_MINIKIN_UTILS_H
namespace android {
class MinikinUtils {
public:
static void SetLayoutProperties(Layout* layout, const SkPaint* paint, int flags,
TypefaceImpl* face);
static float xOffsetForTextAlign(SkPaint* paint, const Layout& layout);
// f is a functor of type void f(SkTypeface *, size_t start, size_t end);
template <typename F>
static void forFontRun(const Layout& layout, F& f) {
SkTypeface* lastFace = NULL;
size_t start = 0;
size_t nGlyphs = layout.nGlyphs();
for (size_t i = 0; i < nGlyphs; i++) {
MinikinFontSkia* mfs = static_cast<MinikinFontSkia*>(layout.getFont(i));
SkTypeface* skFace = mfs->GetSkTypeface();
if (i > 0 && skFace != lastFace) {
f(lastFace, start, i);
start = i;
}
lastFace = skFace;
}
if (nGlyphs > start) {
f(lastFace, start, nGlyphs);
}
}
};
} // namespace android
#endif // ANDROID_MINIKIN_UTILS_H
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