2 * Copyright (C) 2013 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <SkTypeface.h>
20 #define LOG_TAG "Minikin"
21 #include <cutils/log.h>
23 #include "MinikinSkia.h"
27 MinikinFontSkia::MinikinFontSkia(SkTypeface *typeface) :
31 MinikinFontSkia::~MinikinFontSkia() {
32 SkSafeUnref(mTypeface);
35 static void MinikinFontSkia_SetSkiaPaint(const MinikinFont* font, SkPaint* skPaint, const MinikinPaint& paint) {
36 skPaint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
37 skPaint->setTextSize(paint.size);
38 skPaint->setTextScaleX(paint.scaleX);
39 skPaint->setTextSkewX(paint.skewX);
40 MinikinFontSkia::unpackPaintFlags(skPaint, paint.paintFlags);
41 // Apply font fakery on top of user-supplied flags.
42 MinikinFontSkia::populateSkPaint(skPaint, font, paint.fakery);
45 float MinikinFontSkia::GetHorizontalAdvance(uint32_t glyph_id,
46 const MinikinPaint &paint) const {
48 uint16_t glyph16 = glyph_id;
50 MinikinFontSkia_SetSkiaPaint(this, &skPaint, paint);
51 skPaint.getTextWidths(&glyph16, sizeof(glyph16), &skWidth, NULL);
53 ALOGD("width for typeface %d glyph %d = %f", mTypeface->uniqueID(), glyph_id, skWidth);
58 void MinikinFontSkia::GetBounds(MinikinRect* bounds, uint32_t glyph_id,
59 const MinikinPaint& paint) const {
61 uint16_t glyph16 = glyph_id;
63 MinikinFontSkia_SetSkiaPaint(this, &skPaint, paint);
64 skPaint.getTextWidths(&glyph16, sizeof(glyph16), NULL, &skBounds);
65 bounds->mLeft = skBounds.fLeft;
66 bounds->mTop = skBounds.fTop;
67 bounds->mRight = skBounds.fRight;
68 bounds->mBottom = skBounds.fBottom;
71 bool MinikinFontSkia::GetTable(uint32_t tag, uint8_t *buf, size_t *size) {
73 const size_t tableSize = mTypeface->getTableSize(tag);
75 return tableSize != 0;
77 const size_t actualSize = mTypeface->getTableData(tag, 0, *size, buf);
79 return actualSize != 0;
83 SkTypeface *MinikinFontSkia::GetSkTypeface() const {
87 int32_t MinikinFontSkia::GetUniqueId() const {
88 return mTypeface->uniqueID();
91 uint32_t MinikinFontSkia::packPaintFlags(const SkPaint* paint) {
92 uint32_t flags = paint->getFlags();
93 SkPaint::Hinting hinting = paint->getHinting();
94 // select only flags that might affect text layout
95 flags &= (SkPaint::kAntiAlias_Flag | SkPaint::kFakeBoldText_Flag | SkPaint::kLinearText_Flag |
96 SkPaint::kSubpixelText_Flag | SkPaint::kDevKernText_Flag |
97 SkPaint::kEmbeddedBitmapText_Flag | SkPaint::kAutoHinting_Flag |
98 SkPaint::kVerticalText_Flag);
99 flags |= (hinting << 16);
103 void MinikinFontSkia::unpackPaintFlags(SkPaint* paint, uint32_t paintFlags) {
104 paint->setFlags(paintFlags & SkPaint::kAllFlags);
105 paint->setHinting(static_cast<SkPaint::Hinting>(paintFlags >> 16));
108 void MinikinFontSkia::populateSkPaint(SkPaint* paint, const MinikinFont* font, FontFakery fakery) {
109 paint->setTypeface(reinterpret_cast<const MinikinFontSkia*>(font)->GetSkTypeface());
110 paint->setFakeBoldText(paint->isFakeBoldText() || fakery.isFakeBold());
111 if (fakery.isFakeItalic()) {
112 paint->setTextSkewX(paint->getTextSkewX() - 0.25f);