/** * @file llfontregistry.cpp * @author Brad Payne * @brief Storage for fonts. * * $LicenseInfo:firstyear=2008&license=viewergpl$ * * Copyright (c) 2008-2009, Linden Research, Inc. * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 * ("GPL"), unless you have obtained a separate licensing agreement * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at * http://secondlifegrid.net/programs/open_source/licensing/flossexception * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ #include "linden_common.h" #include "llgl.h" #include "llfontfreetype.h" #include "llfontgl.h" #include "llfontregistry.h" #include <boost/tokenizer.hpp> #include "llcontrol.h" #include "lldir.h" #include "llwindow.h" extern LLControlGroup gSavedSettings; using std::string; using std::map; bool fontDescInitFromXML(LLXMLNodePtr node, LLFontDescriptor& desc); LLFontDescriptor::LLFontDescriptor(): mStyle(0) { } LLFontDescriptor::LLFontDescriptor(const std::string& name, const std::string& size, const U8 style, const string_vec_t& file_names): mName(name), mSize(size), mStyle(style), mFileNames(file_names) { } LLFontDescriptor::LLFontDescriptor(const std::string& name, const std::string& size, const U8 style): mName(name), mSize(size), mStyle(style) { } bool LLFontDescriptor::operator<(const LLFontDescriptor& b) const { if (mName < b.mName) return true; else if (mName > b.mName) return false; if (mStyle < b.mStyle) return true; else if (mStyle > b.mStyle) return false; if (mSize < b.mSize) return true; else return false; } static const std::string s_template_string("TEMPLATE"); bool LLFontDescriptor::isTemplate() const { return getSize() == s_template_string; } // Look for substring match and remove substring if matched. bool removeSubString(std::string& str, const std::string& substr) { size_t pos = str.find(substr); if (pos != string::npos) { str.erase(pos, substr.size()); return true; } return false; } // Check for substring match without modifying the source string. bool findSubString(std::string& str, const std::string& substr) { size_t pos = str.find(substr); if (pos != string::npos) { return true; } return false; } // Normal form is // - raw name // - bold, italic style info reflected in both style and font name. // - other style info removed. // - size info moved to mSize, defaults to Medium // For example, // - "SansSerifHuge" would normalize to { "SansSerif", "Huge", 0 } // - "SansSerifBold" would normalize to { "SansSerifBold", "Medium", BOLD } LLFontDescriptor LLFontDescriptor::normalize() const { std::string new_name(mName); std::string new_size(mSize); U8 new_style(mStyle); // Only care about style to extent it can be picked up by font. new_style &= (LLFontGL::BOLD | LLFontGL::ITALIC); // All these transformations are to support old-style font specifications. if (removeSubString(new_name,"Small")) new_size = "Small"; if (removeSubString(new_name,"Big")) new_size = "Large"; if (removeSubString(new_name,"Medium")) new_size = "Medium"; if (removeSubString(new_name,"Large")) new_size = "Large"; if (removeSubString(new_name,"Huge")) new_size = "Huge"; // HACK - Monospace is the only one we don't remove, so // name "Monospace" doesn't get taken down to "" // For other fonts, there's no ambiguity between font name and size specifier. if (new_size != s_template_string && new_size.empty() && findSubString(new_name,"Monospace")) new_size = "Monospace"; if (new_size.empty()) new_size = "Medium"; if (removeSubString(new_name,"Bold")) new_style |= LLFontGL::BOLD; if (removeSubString(new_name,"Italic")) new_style |= LLFontGL::ITALIC; return LLFontDescriptor(new_name,new_size,new_style,getFileNames()); } LLFontRegistry::LLFontRegistry(const string_vec_t& xui_paths, bool create_gl_textures) : mCreateGLTextures(create_gl_textures) { // Propagate this down from LLUICtrlFactory so LLRender doesn't // need an upstream dependency on LLUI. mXUIPaths = xui_paths; // This is potentially a slow directory traversal, so we want to // cache the result. mUltimateFallbackList = LLWindow::getDynamicFallbackFontList(); } LLFontRegistry::~LLFontRegistry() { clear(); } bool LLFontRegistry::parseFontInfo(const std::string& xml_filename) { bool success = false; // Succeed if we find at least one XUI file const string_vec_t& xml_paths = mXUIPaths; for (string_vec_t::const_iterator path_it = xml_paths.begin(); path_it != xml_paths.end(); ++path_it) { LLXMLNodePtr root; std::string full_filename = gDirUtilp->findSkinnedFilename(*path_it, xml_filename); bool parsed_file = LLXMLNode::parseFile(full_filename, root, NULL); if (!parsed_file) continue; if ( root.isNull() || ! root->hasName( "fonts" ) ) { llwarns << "Bad font info file: " << full_filename << llendl; continue; } std::string root_name; root->getAttributeString("name",root_name); if (root->hasName("fonts")) { // Expect a collection of children consisting of "font" or "font_size" entries bool init_succ = initFromXML(root); success = success || init_succ; } } //if (success) // dump(); return success; } std::string currentOsName() { #if LL_WINDOWS return "Windows"; #elif LL_DARWIN return "Mac"; #elif LL_SDL return "Linux"; #else return ""; #endif } bool fontDescInitFromXML(LLXMLNodePtr node, LLFontDescriptor& desc) { if (node->hasName("font")) { std::string attr_name; if (node->getAttributeString("name",attr_name)) { desc.setName(attr_name); } std::string attr_style; if (node->getAttributeString("font_style",attr_style)) { desc.setStyle(LLFontGL::getStyleFromString(attr_style)); } desc.setSize(s_template_string); } LLXMLNodePtr child; for (child = node->getFirstChild(); child.notNull(); child = child->getNextSibling()) { std::string child_name; child->getAttributeString("name",child_name); if (child->hasName("file")) { std::string font_file_name = child->getTextContents(); desc.getFileNames().push_back(font_file_name); } else if (child->hasName("os")) { if (child_name == currentOsName()) { fontDescInitFromXML(child, desc); } } } return true; } bool LLFontRegistry::initFromXML(LLXMLNodePtr node) { LLXMLNodePtr child; for (child = node->getFirstChild(); child.notNull(); child = child->getNextSibling()) { std::string child_name; child->getAttributeString("name",child_name); if (child->hasName("font")) { LLFontDescriptor desc; bool font_succ = fontDescInitFromXML(child, desc); LLFontDescriptor norm_desc = desc.normalize(); if (font_succ) { // if this is the first time we've seen this font name, // create a new template map entry for it. const LLFontDescriptor *match_desc = getMatchingFontDesc(desc); if (match_desc == NULL) { // Create a new entry (with no corresponding font). mFontMap[norm_desc] = NULL; } // otherwise, find the existing entry and combine data. else { // Prepend files from desc. // A little roundabout because the map key is const, // so we have to fetch it, make a new map key, and // replace the old entry. string_vec_t match_file_names = match_desc->getFileNames(); match_file_names.insert(match_file_names.begin(), desc.getFileNames().begin(), desc.getFileNames().end()); LLFontDescriptor new_desc = *match_desc; new_desc.getFileNames() = match_file_names; mFontMap.erase(*match_desc); mFontMap[new_desc] = NULL; } } } else if (child->hasName("font_size")) { std::string size_name; F32 size_value; if (child->getAttributeString("name",size_name) && child->getAttributeF32("size",size_value)) { mFontSizes[size_name] = size_value; } } } return true; } bool LLFontRegistry::nameToSize(const std::string& size_name, F32& size) { font_size_map_t::iterator it = mFontSizes.find(size_name); if (it != mFontSizes.end()) { size = it->second; return true; } return false; } LLFontGL *LLFontRegistry::createFont(const LLFontDescriptor& desc) { // Name should hold a font name recognized as a setting; the value // of the setting should be a list of font files. // Size should be a recognized string value // Style should be a set of flags including any implied by the font name. // First decipher the requested size. LLFontDescriptor norm_desc = desc.normalize(); F32 point_size; bool found_size = nameToSize(norm_desc.getSize(),point_size); if (!found_size) { llwarns << "createFont unrecognized size " << norm_desc.getSize() << llendl; return NULL; } llinfos << "createFont " << norm_desc.getName() << " size " << norm_desc.getSize() << " style " << ((S32) norm_desc.getStyle()) << llendl; F32 fallback_scale = 1.0; // Find corresponding font template (based on same descriptor with no size specified) LLFontDescriptor template_desc(norm_desc); template_desc.setSize(s_template_string); const LLFontDescriptor *match_desc = getClosestFontTemplate(template_desc); if (!match_desc) { llwarns << "createFont failed, no template found for " << norm_desc.getName() << " style [" << ((S32)norm_desc.getStyle()) << "]" << llendl; return NULL; } // See whether this best-match font has already been instantiated in the requested size. LLFontDescriptor nearest_exact_desc = *match_desc; nearest_exact_desc.setSize(norm_desc.getSize()); font_reg_map_t::iterator it = mFontMap.find(nearest_exact_desc); // If we fail to find a font in the fonts directory, it->second might be NULL. // We shouldn't construcnt a font with a NULL mFontFreetype. // This may not be the best solution, but it at least prevents a crash. if (it != mFontMap.end() && it->second != NULL) { llinfos << "-- matching font exists: " << nearest_exact_desc.getName() << " size " << nearest_exact_desc.getSize() << " style " << ((S32) nearest_exact_desc.getStyle()) << llendl; // copying underlying Freetype font, and storing in LLFontGL with requested font descriptor LLFontGL *font = new LLFontGL; font->mFontDescriptor = desc; font->mFontFreetype = it->second->mFontFreetype; mFontMap[desc] = font; return font; } // Build list of font names to look for. // Files specified for this font come first, followed by those from the default descriptor. string_vec_t file_names = match_desc->getFileNames(); string_vec_t default_file_names; LLFontDescriptor default_desc("default",s_template_string,0); const LLFontDescriptor *match_default_desc = getMatchingFontDesc(default_desc); if (match_default_desc) { file_names.insert(file_names.end(), match_default_desc->getFileNames().begin(), match_default_desc->getFileNames().end()); } // Add ultimate fallback list - generated dynamically on linux, // null elsewhere. file_names.insert(file_names.end(), getUltimateFallbackList().begin(), getUltimateFallbackList().end()); // Load fonts based on names. if (file_names.empty()) { llwarns << "createFont failed, no file names specified" << llendl; return NULL; } LLFontFreetype::font_vector_t fontlist; LLFontGL *result = NULL; // Snarf all fonts we can into fontlist. First will get pulled // off the list and become the "head" font, set to non-fallback. // Rest will consitute the fallback list. BOOL is_first_found = TRUE; std::string local_path = LLFontGL::getFontPathLocal(); std::string sys_path = LLFontGL::getFontPathSystem(); // The fontname string may contain multiple font file names separated by semicolons. // Break it apart and try loading each one, in order. for(string_vec_t::iterator file_name_it = file_names.begin(); file_name_it != file_names.end(); ++file_name_it) { LLFontGL *fontp = new LLFontGL; std::string font_path = local_path + *file_name_it; // *HACK: Fallback fonts don't render, so we can use that to suppress // creation of OpenGL textures for test apps. JC BOOL is_fallback = !is_first_found || !mCreateGLTextures; F32 extra_scale = (is_fallback)?fallback_scale:1.0; if (!fontp->loadFace(font_path, extra_scale * point_size, LLFontGL::sVertDPI, LLFontGL::sHorizDPI, 2, is_fallback)) { font_path = sys_path + *file_name_it; if (!fontp->loadFace(font_path, extra_scale * point_size, LLFontGL::sVertDPI, LLFontGL::sHorizDPI, 2, is_fallback)) { LL_INFOS_ONCE("LLFontRegistry") << "Couldn't load font " << *file_name_it << LL_ENDL; delete fontp; fontp = NULL; } } if(fontp) { if (is_first_found) { result = fontp; is_first_found = false; } else { fontlist.push_back(fontp->mFontFreetype); delete fontp; fontp = NULL; } } } if (result && !fontlist.empty()) { result->mFontFreetype->setFallbackFonts(fontlist); } if (result) { result->mFontDescriptor = desc; } else { llwarns << "createFont failed in some way" << llendl; } mFontMap[desc] = result; return result; } void LLFontRegistry::reset() { for (font_reg_map_t::iterator it = mFontMap.begin(); it != mFontMap.end(); ++it) { // Reset the corresponding font but preserve the entry. if (it->second) it->second->reset(); } } void LLFontRegistry::clear() { for (font_reg_map_t::iterator it = mFontMap.begin(); it != mFontMap.end(); ++it) { LLFontGL *fontp = it->second; delete fontp; } mFontMap.clear(); } void LLFontRegistry::destroyGL() { for (font_reg_map_t::iterator it = mFontMap.begin(); it != mFontMap.end(); ++it) { // Reset the corresponding font but preserve the entry. if (it->second) it->second->destroyGL(); } } LLFontGL *LLFontRegistry::getFont(const LLFontDescriptor& desc) { font_reg_map_t::iterator it = mFontMap.find(desc); if (it != mFontMap.end()) return it->second; else { LLFontGL *fontp = createFont(desc); if (!fontp) { llwarns << "getFont failed, name " << desc.getName() <<" style=[" << ((S32) desc.getStyle()) << "]" << " size=[" << desc.getSize() << "]" << llendl; } return fontp; } } const LLFontDescriptor *LLFontRegistry::getMatchingFontDesc(const LLFontDescriptor& desc) { LLFontDescriptor norm_desc = desc.normalize(); font_reg_map_t::iterator it = mFontMap.find(norm_desc); if (it != mFontMap.end()) return &(it->first); else return NULL; } static U32 bitCount(U8 c) { U32 count = 0; if (c & 1) count++; if (c & 2) count++; if (c & 4) count++; if (c & 8) count++; if (c & 16) count++; if (c & 32) count++; if (c & 64) count++; if (c & 128) count++; return count; } // Find nearest match for the requested descriptor. const LLFontDescriptor *LLFontRegistry::getClosestFontTemplate(const LLFontDescriptor& desc) { const LLFontDescriptor *exact_match_desc = getMatchingFontDesc(desc); if (exact_match_desc) { return exact_match_desc; } LLFontDescriptor norm_desc = desc.normalize(); const LLFontDescriptor *best_match_desc = NULL; for (font_reg_map_t::iterator it = mFontMap.begin(); it != mFontMap.end(); ++it) { const LLFontDescriptor* curr_desc = &(it->first); // Ignore if not a template. if (!curr_desc->isTemplate()) continue; // Ignore if font name is wrong. if (curr_desc->getName() != norm_desc.getName()) continue; // Reject font if it matches any bits we don't want if (curr_desc->getStyle() & ~norm_desc.getStyle()) { continue; } // Take if it's the first plausible candidate we've found. if (!best_match_desc) { best_match_desc = curr_desc; continue; } // Take if it matches more bits than anything before. U8 best_style_match_bits = norm_desc.getStyle() & best_match_desc->getStyle(); U8 curr_style_match_bits = norm_desc.getStyle() & curr_desc->getStyle(); if (bitCount(curr_style_match_bits) > bitCount(best_style_match_bits)) { best_match_desc = curr_desc; continue; } // Tie-breaker: take if it matches bold. if (curr_style_match_bits & LLFontGL::BOLD) // Bold is requested and this descriptor matches it. { best_match_desc = curr_desc; continue; } } // Nothing matched. return best_match_desc; } void LLFontRegistry::dump() { llinfos << "LLFontRegistry dump: " << llendl; for (font_size_map_t::iterator size_it = mFontSizes.begin(); size_it != mFontSizes.end(); ++size_it) { llinfos << "Size: " << size_it->first << " => " << size_it->second << llendl; } for (font_reg_map_t::iterator font_it = mFontMap.begin(); font_it != mFontMap.end(); ++font_it) { const LLFontDescriptor& desc = font_it->first; llinfos << "Font: name=" << desc.getName() << " style=[" << ((S32)desc.getStyle()) << "]" << " size=[" << desc.getSize() << "]" << " fileNames=" << llendl; for (string_vec_t::const_iterator file_it=desc.getFileNames().begin(); file_it != desc.getFileNames().end(); ++file_it) { llinfos << " file: " << *file_it <<llendl; } } } const string_vec_t& LLFontRegistry::getUltimateFallbackList() const { return mUltimateFallbackList; }