| /* |
| * 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. |
| */ |
| |
| #define LOG_TAG "Minikin" |
| #include <cutils/log.h> |
| #include <string> |
| |
| #include "SkPaint.h" |
| #include "minikin/Layout.h" |
| #include "TypefaceImpl.h" |
| #include "MinikinSkia.h" |
| |
| #include "MinikinUtils.h" |
| |
| namespace android { |
| |
| // Do an sprintf starting at offset n, abort on overflow |
| static int snprintfcat(char* buf, int off, int size, const char* format, ...) { |
| va_list args; |
| va_start(args, format); |
| int n = vsnprintf(buf + off, size - off, format, args); |
| LOG_ALWAYS_FATAL_IF(n >= size - off, "String overflow in setting layout properties"); |
| va_end(args); |
| return off + n; |
| } |
| |
| std::string MinikinUtils::setLayoutProperties(Layout* layout, const SkPaint* paint, int bidiFlags, |
| TypefaceImpl* typeface) { |
| TypefaceImpl* resolvedFace = TypefaceImpl_resolveDefault(typeface); |
| layout->setFontCollection(resolvedFace->fFontCollection); |
| FontStyle style = resolvedFace->fStyle; |
| char css[256]; |
| int off = snprintfcat(css, 0, sizeof(css), |
| "font-size: %d; font-scale-x: %f; font-skew-x: %f; -paint-flags: %d;" |
| " font-weight: %d; font-style: %s; -minikin-bidi: %d;", |
| (int)paint->getTextSize(), |
| paint->getTextScaleX(), |
| paint->getTextSkewX(), |
| MinikinFontSkia::packPaintFlags(paint), |
| style.getWeight() * 100, |
| style.getItalic() ? "italic" : "normal", |
| bidiFlags); |
| SkString langString = paint->getPaintOptionsAndroid().getLanguage().getTag(); |
| off = snprintfcat(css, off, sizeof(css), " lang: %s;", langString.c_str()); |
| SkPaintOptionsAndroid::FontVariant var = paint->getPaintOptionsAndroid().getFontVariant(); |
| const char* varstr = var == SkPaintOptionsAndroid::kElegant_Variant ? "elegant" : "compact"; |
| off = snprintfcat(css, off, sizeof(css), " -minikin-variant: %s;", varstr); |
| layout->setProperties(css); |
| return std::string(css); |
| } |
| |
| float MinikinUtils::xOffsetForTextAlign(SkPaint* paint, const Layout& layout) { |
| switch (paint->getTextAlign()) { |
| case SkPaint::kCenter_Align: |
| return layout.getAdvance() * -0.5f; |
| break; |
| case SkPaint::kRight_Align: |
| return -layout.getAdvance(); |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| } |