Layout.cpp revision bcc3dc5a2591a95a57e379e27cbad69c18e91e67
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 21bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <stdio.h> // ditto 229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 23bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <minikin/MinikinFontFreeType.h> 249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/Layout.h> 259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::string; 279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// TODO: globals are not cool, move to a factory-ish object 329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_buffer_t* buffer = 0; 339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::Bitmap(int width, int height) : width(width), height(height) { 359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien buf = new uint8_t[width * height](); 369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::~Bitmap() { 399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien delete[] buf; 409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Bitmap::writePnm(std::ofstream &o) const { 439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "P5" << std::endl; 449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << width << " " << height << std::endl; 459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "255" << std::endl; 469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.write((const char *)buf, width * height); 479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.close(); 489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 50bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienvoid Bitmap::drawGlyph(const GlyphBitmap& bitmap, int x, int y) { 519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bmw = bitmap.width; 52bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien int bmh = bitmap.height; 53bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x += bitmap.left; 54bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien y -= bitmap.top; 559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x0 = std::max(0, x); 569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x1 = std::min(width, x + bmw); 579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y0 = std::max(0, y); 589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y1 = std::min(height, y + bmh); 599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const unsigned char* src = bitmap.buffer + (y0 - y) * bmw + (x0 - x); 609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien uint8_t* dst = buf + y0 * width; 619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int yy = y0; yy < y1; yy++) { 629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int xx = x0; xx < x1; xx++) { 639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int pixel = (int)dst[xx] + (int)src[xx - x]; 649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien pixel = pixel > 0xff ? 0xff : pixel; 659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst[xx] = pixel; 669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien src += bmw; 689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst += width; 699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::init() { 739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien buffer = hb_buffer_create(); 749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::setFontCollection(const FontCollection *collection) { 779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection = collection; 789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_blob_t* referenceTable(hb_face_t* face, hb_tag_t tag, void* userData) { 81bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = reinterpret_cast<MinikinFont *>(userData); 82bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t length = 0; 83bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetTable(tag, NULL, &length); 84bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien char *buffer = reinterpret_cast<char*>(malloc(length)); 889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (!buffer) { 899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 91bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = font->GetTable(tag, reinterpret_cast<uint8_t*>(buffer), &length); 92bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("referenceTable %c%c%c%c length=%d %d\n", 93bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien (tag >>24) & 0xff, (tag>>16)&0xff, (tag>>8)&0xff, tag&0xff, length, ok); 94bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien free(buffer); 969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hb_blob_create(const_cast<char*>(buffer), length, 999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien HB_MEMORY_MODE_WRITABLE, buffer, free); 1009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 1039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 104bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint *>(fontData); 105bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 106bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien uint32_t glyph_id; 107bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetGlyph(unicode, &glyph_id); 108bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 109bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien *glyph = glyph_id; 110bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 111bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return ok; 1129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t harfbuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData) 1159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 116bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint *>(fontData); 117bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 118bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien float advance = font->GetHorizontalAdvance(glyph, *paint); 119bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return 256 * advance + 0.5; 1209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 1239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // Just return true, following the way that Harfbuzz-FreeType 1259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // implementation does. 1269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 1279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_font_funcs_t* getHbFontFuncs() { 1309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien static hb_font_funcs_t* hbFontFuncs = 0; 1319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hbFontFuncs == 0) { 1339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hbFontFuncs = hb_font_funcs_create(); 1349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_func(hbFontFuncs, harfbuzzGetGlyph, 0, 0); 1359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_advance_func(hbFontFuncs, harfbuzzGetGlyphHorizontalAdvance, 0, 0); 1369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_origin_func(hbFontFuncs, harfbuzzGetGlyphHorizontalOrigin, 0, 0); 1379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_make_immutable(hbFontFuncs); 1389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hbFontFuncs; 1409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 142bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienhb_font_t* create_hb_font(MinikinFont* minikinFont, MinikinPaint* minikinPaint) { 143bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_face_t* face = hb_face_create_for_tables(referenceTable, minikinFont, NULL); 1449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t* font = hb_font_create(face); 145bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_funcs(font, getHbFontFuncs(), minikinPaint, 0); 1469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // TODO: manage ownership of face 1479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return font; 1489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic float HBFixedToFloat(hb_position_t v) 1519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1529cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, -8); 1539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t HBFloatToFixed(float v) 1569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 1579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, +8); 1589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::dump() const { 1619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 1629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 1639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << glyph.glyph_id << ": " << glyph.x << ", " << glyph.y << std::endl; 1649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// A couple of things probably need to change: 1689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// 1. Deal with multiple sizes in a layout 1699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// 2. We'll probably store FT_Face as primary and then use a cache 1709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// for the hb fonts 171bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienint Layout::findFace(MinikinFont* face, MinikinPaint* paint) { 1729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int ix; 1739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (ix = 0; ix < mFaces.size(); ix++) { 1749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mFaces[ix] == face) { 1759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 1769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.push_back(face); 179bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_t *font = create_hb_font(face, paint); 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 return FontStyle(weight, italic); 1949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// TODO: API should probably take context 1979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::doLayout(const uint16_t* buf, size_t nchars) { 1989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FT_Error error; 1999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien vector<FontCollection::Run> items; 2019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontStyle style = styleFromCss(mProps); 2029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection->itemize(buf, nchars, style, &items); 2039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 204bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint paint; 205bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien double size = mProps.value(fontSize).getFloatValue(); 206bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien paint.size = size; 207bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 2089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mGlyphs.clear(); 2099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.clear(); 2109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mHbFonts.clear(); 2119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float x = 0; 2129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float y = 0; 2139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t run_ix = 0; run_ix < items.size(); run_ix++) { 2149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontCollection::Run &run = items[run_ix]; 215bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien int font_ix = findFace(run.font, &paint); 216bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien paint.font = mFaces[font_ix]; 2179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t *hbFont = mHbFonts[font_ix]; 2189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 2199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << "Run " << run_ix << ", font " << font_ix << 2209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien " [" << run.start << ":" << run.end << "]" << std::endl; 2219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 222bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_ppem(hbFont, size, size); 223bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_scale(hbFont, HBFloatToFixed(size), HBFloatToFixed(size)); 2249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_buffer_reset(buffer); 2269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_buffer_set_direction(buffer, HB_DIRECTION_LTR); 2279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_buffer_add_utf16(buffer, buf, nchars, run.start, run.end - run.start); 2289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_shape(hbFont, buffer, NULL, 0); 2299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int numGlyphs; 2309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &numGlyphs); 2319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_glyph_position_t *positions = hb_buffer_get_glyph_positions(buffer, NULL); 2329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (unsigned int i = 0; i < numGlyphs; i++) { 2339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 2349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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 << 2359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien ": " << HBFixedToFloat(positions[i].x_advance) << "; " << positions[i].x_offset << ", " << positions[i].y_offset << std::endl; 2369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 2379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_codepoint_t glyph_ix = info[i].codepoint; 2389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float xoff = HBFixedToFloat(positions[i].x_offset); 2399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float yoff = HBFixedToFloat(positions[i].y_offset); 2409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien LayoutGlyph glyph = {font_ix, glyph_ix, x + xoff, y + yoff}; 2419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mGlyphs.push_back(glyph); 2429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien x += HBFixedToFloat(positions[i].x_advance); 2439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 245bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien mAdvance = x; 2469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::draw(Bitmap* surface, int x0, int y0) const { 249bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien /* 250bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien TODO: redo as MinikinPaint settings 2519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mProps.hasTag(minikinHinting)) { 2529cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int hintflags = mProps.value(minikinHinting).getIntValue(); 2539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 1) load_flags |= FT_LOAD_NO_HINTING; 2549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 2) load_flags |= FT_LOAD_NO_AUTOHINT; 2559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 256bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien */ 2579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 2589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 259bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont *mf = mFaces[glyph.font_ix]; 260bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFontFreeType *face = static_cast<MinikinFontFreeType *>(mf); 261bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien GlyphBitmap glyphBitmap; 262bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint paint; 263bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien paint.size = mProps.value(fontSize).getFloatValue(); 264bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = face->Render(glyph.glyph_id, paint, &glyphBitmap); 265bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("glyphBitmap.width=%d, glyphBitmap.height=%d (%d, %d) x=%f, y=%f, ok=%d\n", 266bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien glyphBitmap.width, glyphBitmap.height, glyphBitmap.left, glyphBitmap.top, glyph.x, glyph.y, ok); 267bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 268bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien surface->drawGlyph(glyphBitmap, 269bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x0 + int(floor(glyph.x + 0.5)), y0 + int(floor(glyph.y + 0.5))); 270bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 2719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::setProperties(string css) { 2759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mProps.parse(css); 2769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 278bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienfloat Layout::getAdvance() const { 279bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return mAdvance; 280bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien} 281bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 2829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 283