| /* |
| * 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. |
| */ |
| #include "MinikinUtils.h" |
| |
| #include "Paint.h" |
| #include "SkPathMeasure.h" |
| #include "Typeface.h" |
| |
| #include <cutils/log.h> |
| #include <string> |
| |
| namespace android { |
| |
| FontStyle MinikinUtils::prepareMinikinPaint(MinikinPaint* minikinPaint, FontCollection** pFont, |
| const Paint* paint, Typeface* typeface) { |
| const Typeface* resolvedFace = Typeface::resolveDefault(typeface); |
| *pFont = resolvedFace->fFontCollection; |
| FontStyle resolved = resolvedFace->fStyle; |
| |
| /* Prepare minikin FontStyle */ |
| FontVariant minikinVariant = (paint->getFontVariant() == VARIANT_ELEGANT) ? VARIANT_ELEGANT |
| : VARIANT_COMPACT; |
| const uint32_t langListId = paint->getMinikinLangListId(); |
| FontStyle minikinStyle(langListId, minikinVariant, resolved.getWeight(), resolved.getItalic()); |
| |
| /* Prepare minikin Paint */ |
| // Note: it would be nice to handle fractional size values (it would improve smooth zoom |
| // behavior), but historically size has been treated as an int. |
| // TODO: explore whether to enable fractional sizes, possibly when linear text flag is set. |
| minikinPaint->size = (int)paint->getTextSize(); |
| minikinPaint->scaleX = paint->getTextScaleX(); |
| minikinPaint->skewX = paint->getTextSkewX(); |
| minikinPaint->letterSpacing = paint->getLetterSpacing(); |
| minikinPaint->paintFlags = MinikinFontSkia::packPaintFlags(paint); |
| minikinPaint->fontFeatureSettings = paint->getFontFeatureSettings(); |
| minikinPaint->hyphenEdit = HyphenEdit(paint->getHyphenEdit()); |
| return minikinStyle; |
| } |
| |
| void MinikinUtils::doLayout(Layout* layout, const Paint* paint, int bidiFlags, |
| Typeface* typeface, const uint16_t* buf, size_t start, size_t count, |
| size_t bufSize) { |
| FontCollection *font; |
| MinikinPaint minikinPaint; |
| FontStyle minikinStyle = prepareMinikinPaint(&minikinPaint, &font, paint, typeface); |
| layout->setFontCollection(font); |
| layout->doLayout(buf, start, count, bufSize, bidiFlags, minikinStyle, minikinPaint); |
| } |
| |
| float MinikinUtils::measureText(const Paint* paint, int bidiFlags, Typeface* typeface, |
| const uint16_t* buf, size_t start, size_t count, size_t bufSize, float *advances) { |
| FontCollection *font; |
| MinikinPaint minikinPaint; |
| FontStyle minikinStyle = prepareMinikinPaint(&minikinPaint, &font, paint, typeface); |
| return Layout::measureText(buf, start, count, bufSize, bidiFlags, minikinStyle, minikinPaint, |
| font, advances); |
| } |
| |
| bool MinikinUtils::hasVariationSelector(Typeface* typeface, uint32_t codepoint, uint32_t vs) { |
| const Typeface* resolvedFace = Typeface::resolveDefault(typeface); |
| return resolvedFace->fFontCollection->hasVariationSelector(codepoint, vs); |
| } |
| |
| float MinikinUtils::xOffsetForTextAlign(Paint* paint, const Layout& layout) { |
| switch (paint->getTextAlign()) { |
| case Paint::kCenter_Align: |
| return layout.getAdvance() * -0.5f; |
| break; |
| case Paint::kRight_Align: |
| return -layout.getAdvance(); |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| float MinikinUtils::hOffsetForTextAlign(Paint* paint, const Layout& layout, const SkPath& path) { |
| float align = 0; |
| switch (paint->getTextAlign()) { |
| case Paint::kCenter_Align: |
| align = -0.5f; |
| break; |
| case Paint::kRight_Align: |
| align = -1; |
| break; |
| default: |
| return 0; |
| } |
| SkPathMeasure measure(path, false); |
| return align * (layout.getAdvance() - measure.getLength()); |
| } |
| |
| } |