Layout.cpp revision 86fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfc
19cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien/* 29cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Copyright (C) 2013 The Android Open Source Project 39cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 49cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Licensed under the Apache License, Version 2.0 (the "License"); 59cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * you may not use this file except in compliance with the License. 69cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * You may obtain a copy of the License at 79cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 89cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * http://www.apache.org/licenses/LICENSE-2.0 99cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Unless required by applicable law or agreed to in writing, software 119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * distributed under the License is distributed on an "AS IS" BASIS, 129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * See the License for the specific language governing permissions and 149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * limitations under the License. 159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien */ 169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 17ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#define LOG_TAG "Minikin" 18ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#include <cutils/log.h> 19ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <string> 219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <vector> 22d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien#include <algorithm> 239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <fstream> 249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <iostream> // for debugging 25bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <stdio.h> // ditto 269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 27d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien#include <unicode/ubidi.h> 28ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#include <hb-icu.h> 29ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 30b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien#include "MinikinInternal.h" 31bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <minikin/MinikinFontFreeType.h> 329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/Layout.h> 339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::string; 359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// TODO: globals are not cool, move to a factory-ish object 409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_buffer_t* buffer = 0; 419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 4286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien// TODO: these should move into the header file, but for now we don't want 4386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien// to cause namespace collisions with TextLayout.h 4486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienenum { 4586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_LTR = 0, 4686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_RTL = 1, 4786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Default_LTR = 2, 4886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Default_RTL = 3, 4986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Force_LTR = 4, 5086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Force_RTL = 5, 5186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 5286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Mask = 0x7 5386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien}; 5486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 5586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienconst int kDirection_Mask = 0x1; 5686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::Bitmap(int width, int height) : width(width), height(height) { 589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien buf = new uint8_t[width * height](); 599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::~Bitmap() { 629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien delete[] buf; 639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Bitmap::writePnm(std::ofstream &o) const { 669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "P5" << std::endl; 679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << width << " " << height << std::endl; 689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "255" << std::endl; 699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.write((const char *)buf, width * height); 709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.close(); 719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 73bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienvoid Bitmap::drawGlyph(const GlyphBitmap& bitmap, int x, int y) { 749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bmw = bitmap.width; 75bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien int bmh = bitmap.height; 76bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x += bitmap.left; 77bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien y -= bitmap.top; 789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x0 = std::max(0, x); 799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x1 = std::min(width, x + bmw); 809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y0 = std::max(0, y); 819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y1 = std::min(height, y + bmh); 829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const unsigned char* src = bitmap.buffer + (y0 - y) * bmw + (x0 - x); 839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien uint8_t* dst = buf + y0 * width; 849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int yy = y0; yy < y1; yy++) { 859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int xx = x0; xx < x1; xx++) { 869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int pixel = (int)dst[xx] + (int)src[xx - x]; 879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien pixel = pixel > 0xff ? 0xff : pixel; 889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst[xx] = pixel; 899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien src += bmw; 919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst += width; 929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 95ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid MinikinRect::join(const MinikinRect& r) { 96ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (isEmpty()) { 97ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien set(r); 98ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (!r.isEmpty()) { 99ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mLeft = std::min(mLeft, r.mLeft); 100ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mTop = std::min(mTop, r.mTop); 101ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mRight = std::max(mRight, r.mRight); 102ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBottom = std::max(mBottom, r.mBottom); 103ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 104ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 105ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 106ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien// TODO: the actual initialization is deferred, maybe make this explicit 1079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::init() { 1089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::setFontCollection(const FontCollection *collection) { 1119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection = collection; 1129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_blob_t* referenceTable(hb_face_t* face, hb_tag_t tag, void* userData) { 115bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = reinterpret_cast<MinikinFont *>(userData); 116bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t length = 0; 117bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetTable(tag, NULL, &length); 118bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 1199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 1209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien char *buffer = reinterpret_cast<char*>(malloc(length)); 1229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (!buffer) { 1239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 1249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 125bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = font->GetTable(tag, reinterpret_cast<uint8_t*>(buffer), &length); 126bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("referenceTable %c%c%c%c length=%d %d\n", 127bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien (tag >>24) & 0xff, (tag>>16)&0xff, (tag>>8)&0xff, tag&0xff, length, ok); 128bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 1299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien free(buffer); 1309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 1319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hb_blob_create(const_cast<char*>(buffer), length, 1339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien HB_MEMORY_MODE_WRITABLE, buffer, free); 1349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_bool_t harfbuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData) 1379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 138bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint *>(fontData); 139bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 140bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien uint32_t glyph_id; 141bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetGlyph(unicode, &glyph_id); 142bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 143bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien *glyph = glyph_id; 144bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 145bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return ok; 1469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t harfbuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData) 1499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 150bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint *>(fontData); 151bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 152bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien float advance = font->GetHorizontalAdvance(glyph, *paint); 153bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return 256 * advance + 0.5; 1549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_bool_t harfbuzzGetGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData) 1579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // Just return true, following the way that Harfbuzz-FreeType 1599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // implementation does. 1609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 1619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_font_funcs_t* getHbFontFuncs() { 1649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien static hb_font_funcs_t* hbFontFuncs = 0; 1659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hbFontFuncs == 0) { 1679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hbFontFuncs = hb_font_funcs_create(); 1689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_func(hbFontFuncs, harfbuzzGetGlyph, 0, 0); 1699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_advance_func(hbFontFuncs, harfbuzzGetGlyphHorizontalAdvance, 0, 0); 1709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_origin_func(hbFontFuncs, harfbuzzGetGlyphHorizontalOrigin, 0, 0); 1719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_make_immutable(hbFontFuncs); 1729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hbFontFuncs; 1749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 176bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienhb_font_t* create_hb_font(MinikinFont* minikinFont, MinikinPaint* minikinPaint) { 177bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_face_t* face = hb_face_create_for_tables(referenceTable, minikinFont, NULL); 1789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t* font = hb_font_create(face); 179c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien hb_face_destroy(face); 180bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_funcs(font, getHbFontFuncs(), minikinPaint, 0); 1819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // TODO: manage ownership of face 1829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return font; 1839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic float HBFixedToFloat(hb_position_t v) 1869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, -8); 1889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t HBFloatToFixed(float v) 1919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, +8); 1939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 195c31e3883456e018d742e9f29815ba5ff8b315ea1Raph LevienLayout::~Layout() { 196c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien for (size_t ix = 0; ix < mHbFonts.size(); ix++) { 197c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien hb_font_destroy(mHbFonts[ix]); 198c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien } 199c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien} 200c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien 2019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::dump() const { 2029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 2039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 2049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << glyph.glyph_id << ": " << glyph.x << ", " << glyph.y << std::endl; 2059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// A couple of things probably need to change: 2099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// 1. Deal with multiple sizes in a layout 2109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// 2. We'll probably store FT_Face as primary and then use a cache 2119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// for the hb fonts 212bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienint Layout::findFace(MinikinFont* face, MinikinPaint* paint) { 2139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int ix; 2149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (ix = 0; ix < mFaces.size(); ix++) { 2159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mFaces[ix] == face) { 2169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 2179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.push_back(face); 220bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_t *font = create_hb_font(face, paint); 2219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mHbFonts.push_back(font); 2229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 2239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic FontStyle styleFromCss(const CssProperties &props) { 2269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int weight = 4; 2279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontWeight)) { 2289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien weight = props.value(fontWeight).getIntValue() / 100; 2299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bool italic = false; 2319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontStyle)) { 2329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien italic = props.value(fontStyle).getIntValue() != 0; 2339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return FontStyle(weight, italic); 2359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 237ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienstatic hb_script_t codePointToScript(hb_codepoint_t codepoint) { 238ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien static hb_unicode_funcs_t *u = 0; 239ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (!u) { 240ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien u = hb_icu_get_unicode_funcs(); 241ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 242ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return hb_unicode_script(u, codepoint); 243ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 244ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 245ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienstatic hb_codepoint_t decodeUtf16(const uint16_t *chars, size_t len, ssize_t *iter) { 246ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v = chars[(*iter)++]; 247ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdfff), lead or trail surrogate 248ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v & 0xf800) == 0xd800) { 249ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdbff), lead surrogate 250ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) < len && (v & 0xfc00) == 0xd800) { 251ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v2 = chars[(*iter)++]; 252ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v2 in (0xdc00..0xdfff), trail surrogate 253ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v2 & 0xfc00) == 0xdc00) { 254ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // (0xd800 0xdc00) in utf-16 maps to 0x10000 in ucs-32 255ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_codepoint_t delta = (0xd800 << 10) + 0xdc00 - 0x10000; 256ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return (((hb_codepoint_t)v) << 10) + v2 - delta; 257ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 258ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien (*iter) -= 2; 259ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return ~0u; 260ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 261ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien (*iter)--; 262ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return ~0u; 263ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 264ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 265ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return v; 266ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 267ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 268ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 269ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienstatic hb_script_t getScriptRun(const uint16_t *chars, size_t len, ssize_t *iter) { 270ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) { 271ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return HB_SCRIPT_UNKNOWN; 272ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 273ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien uint32_t cp = decodeUtf16(chars, len, iter); 274ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_script_t current_script = codePointToScript(cp); 275ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (;;) { 276ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) 277ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 278ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const ssize_t prev_iter = *iter; 279ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien cp = decodeUtf16(chars, len, iter); 280ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_script_t script = codePointToScript(cp); 281ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (script != current_script) { 282ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED || 283ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script == HB_SCRIPT_COMMON) { 284ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = script; 285ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (script == HB_SCRIPT_INHERITED || 286ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien script == HB_SCRIPT_COMMON) { 287ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien continue; 288ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 289ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien *iter = prev_iter; 290ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 291ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 292ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 293ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 294ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED) { 295ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = HB_SCRIPT_COMMON; 296ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 297ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 298ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return current_script; 299ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 300ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 3019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// TODO: API should probably take context 3029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::doLayout(const uint16_t* buf, size_t nchars) { 303b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien AutoMutex _l(gMinikinLock); 304ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (buffer == 0) { 305ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien buffer = hb_buffer_create(); 306ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 3079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Error error; 3089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontStyle style = styleFromCss(mProps); 3109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 311bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint paint; 312bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien double size = mProps.value(fontSize).getFloatValue(); 313bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien paint.size = size; 314d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien int bidiFlags = mProps.hasTag(minikinBidi) ? mProps.value(minikinBidi).getIntValue() : 0; 31586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool isRtl = (bidiFlags & kDirection_Mask) != 0; 31686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool doSingleRun = true; 317bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 3189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mGlyphs.clear(); 3199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.clear(); 3209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mHbFonts.clear(); 321ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBounds.setEmpty(); 322ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mAdvances.clear(); 323ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mAdvances.resize(nchars, 0); 32486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien mAdvance = 0; 32586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!(bidiFlags == kBidi_Force_LTR || bidiFlags == kBidi_Force_RTL)) { 32686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDi* bidi = ubidi_open(); 32786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidi) { 32886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UErrorCode status = U_ZERO_ERROR; 32986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiLevel bidiReq = bidiFlags; 33086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidiFlags == kBidi_Default_LTR) { 33186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_LTR; 33286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else if (bidiFlags == kBidi_Default_RTL) { 33386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_RTL; 33486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 33586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ubidi_setPara(bidi, buf, nchars, bidiReq, NULL, &status); 33686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (U_SUCCESS(status)) { 33786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int paraDir = ubidi_getParaLevel(bidi) & kDirection_Mask; 33886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ssize_t rc = ubidi_countRuns(bidi, &status); 33986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!U_SUCCESS(status) || rc < 1) { 34086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGD("error counting bidi runs, status = %d", status); 34186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 34286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!U_SUCCESS(status) || rc <= 1) { 34386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien isRtl = (paraDir == kBidi_RTL); 34486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 34586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien doSingleRun = false; 34686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien // iterate through runs 34786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien for (ssize_t i = 0; i < (ssize_t)rc; i++) { 34886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t startRun = -1; 34986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t lengthRun = -1; 35086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiDirection runDir = ubidi_getVisualRun(bidi, i, &startRun, &lengthRun); 35186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (startRun == -1 || lengthRun == -1) { 35286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("invalid visual run"); 35386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien // Note: this case will lose text; can it ever actually happen? 35486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien break; 35586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 35686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien isRtl = (runDir == UBIDI_RTL); 35786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien // TODO: min/max with context 35886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien doLayoutRun(buf, startRun, lengthRun, nchars, isRtl, style, paint); 35986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 36086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 36186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 36286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error calling ubidi_setPara, status = %d", status); 36386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 36486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ubidi_close(bidi); 36586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 36686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error creating bidi object"); 36786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 36886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 36986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (doSingleRun) { 37086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien doLayoutRun(buf, 0, nchars, nchars, isRtl, style, paint); 37186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 37286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien} 37386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 37486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienvoid Layout::doLayoutRun(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 37586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool isRtl, FontStyle style, MinikinPaint& paint) { 37686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien vector<FontCollection::Run> items; 37786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien mCollection->itemize(buf + start, count, style, &items); 37886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (isRtl) { 37986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien std::reverse(items.begin(), items.end()); 38086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 38186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 38286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien float x = mAdvance; 3839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float y = 0; 3849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t run_ix = 0; run_ix < items.size(); run_ix++) { 3859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontCollection::Run &run = items[run_ix]; 386bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien int font_ix = findFace(run.font, &paint); 387bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien paint.font = mFaces[font_ix]; 3889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t *hbFont = mHbFonts[font_ix]; 389ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (paint.font == NULL) { 390ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // TODO: should log what went wrong 391ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien continue; 392ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 3939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 3949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << "Run " << run_ix << ", font " << font_ix << 3959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien " [" << run.start << ":" << run.end << "]" << std::endl; 3969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 39786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien double size = paint.size; 398bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_ppem(hbFont, size, size); 399bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_scale(hbFont, HBFloatToFixed(size), HBFloatToFixed(size)); 4009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 401d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // TODO: if there are multiple scripts within a font in an RTL run, 402d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // we need to reorder those runs. This is unlikely with our current 403d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // font stack, but should be done for correctness. 4040a689bb956183beebe7d59fccb226a82680f265aRaph Levien ssize_t srunend; 4050a689bb956183beebe7d59fccb226a82680f265aRaph Levien for (ssize_t srunstart = run.start; srunstart < run.end; srunstart = srunend) { 406ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien srunend = srunstart; 40786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_script_t script = getScriptRun(buf + start, run.end, &srunend); 408ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 409ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_buffer_reset(buffer); 410ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_buffer_set_script(buffer, script); 411d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien hb_buffer_set_direction(buffer, isRtl? HB_DIRECTION_RTL : HB_DIRECTION_LTR); 41286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_buffer_add_utf16(buffer, buf, bufSize, srunstart + start, srunend - srunstart); 413ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_shape(hbFont, buffer, NULL, 0); 414ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien unsigned int numGlyphs; 415ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &numGlyphs); 416ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_glyph_position_t *positions = hb_buffer_get_glyph_positions(buffer, NULL); 417ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (unsigned int i = 0; i < numGlyphs; i++) { 418ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #ifdef VERBOSE 419ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien std::cout << positions[i].x_advance << " " << positions[i].y_advance << " " << positions[i].x_offset << " " << positions[i].y_offset << std::endl; std::cout << "DoLayout " << info[i].codepoint << 420ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ": " << HBFixedToFloat(positions[i].x_advance) << "; " << positions[i].x_offset << ", " << positions[i].y_offset << std::endl; 421ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #endif 422ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_codepoint_t glyph_ix = info[i].codepoint; 423ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xoff = HBFixedToFloat(positions[i].x_offset); 424ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float yoff = HBFixedToFloat(positions[i].y_offset); 425ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien LayoutGlyph glyph = {font_ix, glyph_ix, x + xoff, y + yoff}; 426ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mGlyphs.push_back(glyph); 427ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xAdvance = HBFixedToFloat(positions[i].x_advance); 428ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien MinikinRect glyphBounds; 429ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien paint.font->GetBounds(&glyphBounds, glyph_ix, paint); 430ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien glyphBounds.offset(x + xoff, y + yoff); 431ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBounds.join(glyphBounds); 432ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien size_t cluster = info[i].cluster; 433ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mAdvances[cluster] += xAdvance; 434ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien x += xAdvance; 435ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 4369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 4379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 438bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien mAdvance = x; 4399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 4409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 4419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::draw(Bitmap* surface, int x0, int y0) const { 442bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien /* 443bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien TODO: redo as MinikinPaint settings 4449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mProps.hasTag(minikinHinting)) { 4459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int hintflags = mProps.value(minikinHinting).getIntValue(); 4469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 1) load_flags |= FT_LOAD_NO_HINTING; 4479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 2) load_flags |= FT_LOAD_NO_AUTOHINT; 4489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 449bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien */ 4509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 4519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 452bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont *mf = mFaces[glyph.font_ix]; 453bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFontFreeType *face = static_cast<MinikinFontFreeType *>(mf); 454bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien GlyphBitmap glyphBitmap; 455bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint paint; 456bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien paint.size = mProps.value(fontSize).getFloatValue(); 457bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = face->Render(glyph.glyph_id, paint, &glyphBitmap); 458bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("glyphBitmap.width=%d, glyphBitmap.height=%d (%d, %d) x=%f, y=%f, ok=%d\n", 459bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien glyphBitmap.width, glyphBitmap.height, glyphBitmap.left, glyphBitmap.top, glyph.x, glyph.y, ok); 460bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 461bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien surface->drawGlyph(glyphBitmap, 462bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x0 + int(floor(glyph.x + 0.5)), y0 + int(floor(glyph.y + 0.5))); 463bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 4649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 4659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 4669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 4679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::setProperties(string css) { 4689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mProps.parse(css); 4699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 4709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 471ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Leviensize_t Layout::nGlyphs() const { 472ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return mGlyphs.size(); 473ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 474ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 475ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph LevienMinikinFont *Layout::getFont(int i) const { 476ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 477ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return mFaces[glyph.font_ix]; 478ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 479ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 480ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienunsigned int Layout::getGlyphId(int i) const { 481ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 482ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.glyph_id; 483ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 484ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 485ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getX(int i) const { 486ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 487ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.x; 488ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 489ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 490ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getY(int i) const { 491ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 492ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.y; 493ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 494ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 495bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienfloat Layout::getAdvance() const { 496bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return mAdvance; 497bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien} 498bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 499ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getAdvances(float* advances) { 500ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien memcpy(advances, &mAdvances[0], mAdvances.size() * sizeof(float)); 501ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 502ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 503ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getBounds(MinikinRect* bounds) { 504ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien bounds->set(mBounds); 505ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 506ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 5079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 508