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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
* Paint and so on.
**/
// TODO: does this really need to be separate from MinikinSkia?
#ifndef ANDROID_MINIKIN_UTILS_H
#define ANDROID_MINIKIN_UTILS_H
#include <minikin/Layout.h>
#include "Paint.h"
#include "MinikinSkia.h"
#include "TypefaceImpl.h"
namespace android {
// TODO: these should be defined in Minikin's Layout.h
enum {
kBidi_LTR = 0,
kBidi_RTL = 1,
kBidi_Default_LTR = 2,
kBidi_Default_RTL = 3,
kBidi_Force_LTR = 4,
kBidi_Force_RTL = 5,
kBidi_Mask = 0x7
};
class MinikinUtils {
public:
static void doLayout(Layout* layout, const Paint* paint, int bidiFlags, TypefaceImpl* typeface,
const uint16_t* buf, size_t start, size_t count, size_t bufSize);
static float xOffsetForTextAlign(Paint* paint, const Layout& layout);
static float hOffsetForTextAlign(Paint* paint, const Layout& layout, const SkPath& path);
// f is a functor of type void f(size_t start, size_t end);
template <typename F>
static void forFontRun(const Layout& layout, Paint* paint, F& f) {
float saveSkewX = paint->getTextSkewX();
bool savefakeBold = paint->isFakeBoldText();
MinikinFont* curFont = NULL;
size_t start = 0;
size_t nGlyphs = layout.nGlyphs();
for (size_t i = 0; i < nGlyphs; i++) {
MinikinFont* nextFont = layout.getFont(i);
if (i > 0 && nextFont != curFont) {
MinikinFontSkia::populateSkPaint(paint, curFont, layout.getFakery(start));
f(start, i);
paint->setTextSkewX(saveSkewX);
paint->setFakeBoldText(savefakeBold);
start = i;
}
curFont = nextFont;
}
if (nGlyphs > start) {
MinikinFontSkia::populateSkPaint(paint, curFont, layout.getFakery(start));
f(start, nGlyphs);
paint->setTextSkewX(saveSkewX);
paint->setFakeBoldText(savefakeBold);
}
}
};
} // namespace android
#endif // ANDROID_MINIKIN_UTILS_H
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