Layout.cpp revision 9cc9bbe1461f359f0b27c5e7645c17dda001ab1d
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 179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <string> 189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <vector> 199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <fstream> 209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <iostream> // for debugging 219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/Layout.h> 239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::string; 259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// TODO: globals are not cool, move to a factory-ish object 309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_buffer_t* buffer = 0; 319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::Bitmap(int width, int height) : width(width), height(height) { 339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien buf = new uint8_t[width * height](); 349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::~Bitmap() { 379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien delete[] buf; 389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Bitmap::writePnm(std::ofstream &o) const { 419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "P5" << std::endl; 429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << width << " " << height << std::endl; 439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "255" << std::endl; 449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.write((const char *)buf, width * height); 459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.close(); 469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Bitmap::drawGlyph(const FT_Bitmap& bitmap, int x, int y) { 499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bmw = bitmap.width; 509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bmh = bitmap.rows; 519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x0 = std::max(0, x); 529cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x1 = std::min(width, x + bmw); 539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y0 = std::max(0, y); 549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y1 = std::min(height, y + bmh); 559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const unsigned char* src = bitmap.buffer + (y0 - y) * bmw + (x0 - x); 569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien uint8_t* dst = buf + y0 * width; 579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int yy = y0; yy < y1; yy++) { 589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int xx = x0; xx < x1; xx++) { 599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int pixel = (int)dst[xx] + (int)src[xx - x]; 609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien pixel = pixel > 0xff ? 0xff : pixel; 619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst[xx] = pixel; 629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien src += bmw; 649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst += width; 659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::init() { 699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien buffer = hb_buffer_create(); 709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::setFontCollection(const FontCollection *collection) { 739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection = collection; 749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_blob_t* referenceTable(hb_face_t* face, hb_tag_t tag, void* userData) { 779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Face ftFace = reinterpret_cast<FT_Face>(userData); 789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_ULong length = 0; 799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Error error = FT_Load_Sfnt_Table(ftFace, tag, 0, NULL, &length); 809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (error) { 819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien char *buffer = reinterpret_cast<char*>(malloc(length)); 849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (!buffer) { 859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien error = FT_Load_Sfnt_Table(ftFace, tag, 0, 889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien reinterpret_cast<FT_Byte*>(buffer), &length); 899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (error) { 909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien free(buffer); 919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hb_blob_create(const_cast<char*>(buffer), length, 949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien HB_MEMORY_MODE_WRITABLE, buffer, free); 959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Face ftFace = reinterpret_cast<FT_Face>(fontData); 1009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_UInt glyph_index = FT_Get_Char_Index(ftFace, unicode); 1019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien *glyph = glyph_index; 1029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return !!*glyph; 1039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t ft_pos_to_hb(FT_Pos pos) { 1069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return pos << 2; 1079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t harfbuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData) 1109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Face ftFace = reinterpret_cast<FT_Face>(fontData); 1129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_position_t advance = 0; 1139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Load_Glyph(ftFace, glyph, FT_LOAD_DEFAULT); 1159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ft_pos_to_hb(ftFace->glyph->advance.x); 1169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 1199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // Just return true, following the way that Harfbuzz-FreeType 1219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // implementation does. 1229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 1239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_font_funcs_t* getHbFontFuncs() { 1269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien static hb_font_funcs_t* hbFontFuncs = 0; 1279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hbFontFuncs == 0) { 1299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hbFontFuncs = hb_font_funcs_create(); 1309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_func(hbFontFuncs, harfbuzzGetGlyph, 0, 0); 1319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_advance_func(hbFontFuncs, harfbuzzGetGlyphHorizontalAdvance, 0, 0); 1329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_origin_func(hbFontFuncs, harfbuzzGetGlyphHorizontalOrigin, 0, 0); 1339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_make_immutable(hbFontFuncs); 1349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hbFontFuncs; 1369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_font_t* create_hb_font(FT_Face ftFace) { 1399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_face_t* face = hb_face_create_for_tables(referenceTable, ftFace, NULL); 1409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t* font = hb_font_create(face); 1419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_set_funcs(font, getHbFontFuncs(), ftFace, 0); 1429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // TODO: manage ownership of face 1439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return font; 1449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic float HBFixedToFloat(hb_position_t v) 1479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, -8); 1499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t HBFloatToFixed(float v) 1529cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, +8); 1549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::dump() const { 1579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 1589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 1599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << glyph.glyph_id << ": " << glyph.x << ", " << glyph.y << std::endl; 1609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// A couple of things probably need to change: 1649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// 1. Deal with multiple sizes in a layout 1659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// 2. We'll probably store FT_Face as primary and then use a cache 1669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// for the hb fonts 1679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienint Layout::findFace(FT_Face face) { 1689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int ix; 1699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (ix = 0; ix < mFaces.size(); ix++) { 1709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mFaces[ix] == face) { 1719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 1729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien double size = mProps.value(fontSize).getFloatValue(); 1759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Error error = FT_Set_Pixel_Sizes(face, 0, size); 1769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.push_back(face); 1779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t *font = create_hb_font(face); 1789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_set_ppem(font, size, size); 1799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_set_scale(font, HBFloatToFixed(size), HBFloatToFixed(size)); 1809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mHbFonts.push_back(font); 1819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 1829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic FontStyle styleFromCss(const CssProperties &props) { 1859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int weight = 4; 1869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontWeight)) { 1879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien weight = props.value(fontWeight).getIntValue() / 100; 1889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bool italic = false; 1909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontStyle)) { 1919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien italic = props.value(fontStyle).getIntValue() != 0; 1929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // TODO: italic property from CSS 1949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return FontStyle(weight, italic); 1959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// TODO: API should probably take context 1989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::doLayout(const uint16_t* buf, size_t nchars) { 1999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Error error; 2009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien vector<FontCollection::Run> items; 2029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontStyle style = styleFromCss(mProps); 2039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection->itemize(buf, nchars, style, &items); 2049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mGlyphs.clear(); 2069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.clear(); 2079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mHbFonts.clear(); 2089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float x = 0; 2099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float y = 0; 2109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t run_ix = 0; run_ix < items.size(); run_ix++) { 2119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontCollection::Run &run = items[run_ix]; 2129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int font_ix = findFace(run.font); 2139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t *hbFont = mHbFonts[font_ix]; 2149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 2159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << "Run " << run_ix << ", font " << font_ix << 2169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien " [" << run.start << ":" << run.end << "]" << std::endl; 2179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 2189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_buffer_reset(buffer); 2209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_buffer_set_direction(buffer, HB_DIRECTION_LTR); 2219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_buffer_add_utf16(buffer, buf, nchars, run.start, run.end - run.start); 2229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_shape(hbFont, buffer, NULL, 0); 2239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int numGlyphs; 2249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &numGlyphs); 2259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_glyph_position_t *positions = hb_buffer_get_glyph_positions(buffer, NULL); 2269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (unsigned int i = 0; i < numGlyphs; i++) { 2279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 2289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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 << 2299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien ": " << HBFixedToFloat(positions[i].x_advance) << "; " << positions[i].x_offset << ", " << positions[i].y_offset << std::endl; 2309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 2319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_codepoint_t glyph_ix = info[i].codepoint; 2329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float xoff = HBFixedToFloat(positions[i].x_offset); 2339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float yoff = HBFixedToFloat(positions[i].y_offset); 2349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien LayoutGlyph glyph = {font_ix, glyph_ix, x + xoff, y + yoff}; 2359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mGlyphs.push_back(glyph); 2369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien x += HBFixedToFloat(positions[i].x_advance); 2379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::draw(Bitmap* surface, int x0, int y0) const { 2429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Error error; 2439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Int32 load_flags = FT_LOAD_DEFAULT; 2449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mProps.hasTag(minikinHinting)) { 2459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int hintflags = mProps.value(minikinHinting).getIntValue(); 2469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 1) load_flags |= FT_LOAD_NO_HINTING; 2479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 2) load_flags |= FT_LOAD_NO_AUTOHINT; 2489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 2509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 2519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Face face = mFaces[glyph.font_ix]; 2529cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien error = FT_Load_Glyph(face, glyph.glyph_id, load_flags); 2539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL); 2549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien surface->drawGlyph(face->glyph->bitmap, 2559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien x0 + int(floor(glyph.x + 0.5)) + face->glyph->bitmap_left, 2569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien y0 + int(floor(glyph.y + 0.5)) - face->glyph->bitmap_top); 2579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::setProperties(string css) { 2619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mProps.parse(css); 2629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 265