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4d4e6bc811
This patch adds caching for both layouts and for HarfBuzz face objects. The granularity of the cache for layouts is words, so it splits the input string at word boundaries (using a heuristic). There are is also some refactoring to reduce the amount of allocation and copying, and movement towards properly supporting contexts. The size of the caches is a fixed number of entries; thus, it is possible to consume a large amount of memory by filling the cache with lots of large strings. This should be refined towards a scheme that bounds the total memory used by the cache. This patch fixes bug 15237293 "Regression: Measure performance is significantly slower with minikin". Change-Id: Ie8176857e2d78656ce5479a7c04969819ef2718d
104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// This is a test program that uses Minikin to layout and draw some text.
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// At the moment, it just draws a string into /data/local/tmp/foo.pgm.
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#include <stdio.h>
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#include <vector>
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#include <fstream>
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#include <unicode/unistr.h>
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#include <unicode/utf16.h>
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#include <minikin/MinikinFontFreeType.h>
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#include <minikin/Layout.h>
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using std::vector;
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namespace android {
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FT_Library library; // TODO: this should not be a global
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FontCollection *makeFontCollection() {
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vector<FontFamily *>typefaces;
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const char *fns[] = {
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"/system/fonts/Roboto-Regular.ttf",
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"/system/fonts/Roboto-Italic.ttf",
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"/system/fonts/Roboto-BoldItalic.ttf",
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"/system/fonts/Roboto-Light.ttf",
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"/system/fonts/Roboto-Thin.ttf",
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"/system/fonts/Roboto-Bold.ttf",
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"/system/fonts/Roboto-ThinItalic.ttf",
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"/system/fonts/Roboto-LightItalic.ttf"
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};
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FontFamily *family = new FontFamily();
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FT_Face face;
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FT_Error error;
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for (size_t i = 0; i < sizeof(fns)/sizeof(fns[0]); i++) {
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const char *fn = fns[i];
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printf("adding %s\n", fn);
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error = FT_New_Face(library, fn, 0, &face);
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if (error != 0) {
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printf("error loading %s, %d\n", fn, error);
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}
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MinikinFont *font = new MinikinFontFreeType(face);
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family->addFont(font);
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}
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typefaces.push_back(family);
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#if 1
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family = new FontFamily();
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const char *fn = "/system/fonts/DroidSansDevanagari-Regular.ttf";
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error = FT_New_Face(library, fn, 0, &face);
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MinikinFont *font = new MinikinFontFreeType(face);
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family->addFont(font);
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typefaces.push_back(family);
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#endif
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return new FontCollection(typefaces);
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}
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int runMinikinTest() {
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FT_Error error = FT_Init_FreeType(&library);
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if (error) {
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return -1;
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}
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Layout::init();
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FontCollection *collection = makeFontCollection();
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Layout layout;
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layout.setFontCollection(collection);
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layout.setProperties("font-size: 32;");
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const char *text = "fine world \xe0\xa4\xa8\xe0\xa4\xae\xe0\xa4\xb8\xe0\xa5\x8d\xe0\xa4\xa4\xe0\xa5\x87";
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icu::UnicodeString icuText = icu::UnicodeString::fromUTF8(text);
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layout.doLayout(icuText.getBuffer(), icuText.length());
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layout.dump();
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Bitmap bitmap(250, 50);
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layout.draw(&bitmap, 10, 40, 32);
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std::ofstream o;
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o.open("/data/local/tmp/foo.pgm", std::ios::out | std::ios::binary);
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bitmap.writePnm(o);
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return 0;
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}
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}
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int main(int argc, const char** argv) {
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return android::runMinikinTest();
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}
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