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|
/**
* @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);
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 (it != mFontMap.end())
{
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);
}
}
}
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;
}
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