1265 lines
29 KiB
C++
1265 lines
29 KiB
C++
/**
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* @file llfontgl.cpp
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* @brief Wrapper around FreeType
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include <boost/tokenizer.hpp>
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#include "llfont.h"
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#include "llfontgl.h"
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#include "llfontbitmapcache.h"
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#include "llfontregistry.h"
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#include "llgl.h"
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#include "llrender.h"
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#include "v4color.h"
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#include "llstl.h"
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#include "llfasttimer.h"
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const S32 BOLD_OFFSET = 1;
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// static class members
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F32 LLFontGL::sVertDPI = 96.f;
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F32 LLFontGL::sHorizDPI = 96.f;
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F32 LLFontGL::sScaleX = 1.f;
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F32 LLFontGL::sScaleY = 1.f;
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BOOL LLFontGL::sDisplayFont = TRUE ;
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std::string LLFontGL::sAppDir;
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LLColor4 LLFontGL::sShadowColor(0.f, 0.f, 0.f, 1.f);
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LLFontRegistry* LLFontGL::sFontRegistry = NULL;
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LLCoordFont LLFontGL::sCurOrigin;
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std::vector<LLCoordFont> LLFontGL::sOriginStack;
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const F32 EXT_X_BEARING = 1.f;
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const F32 EXT_Y_BEARING = 0.f;
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const F32 EXT_KERNING = 1.f;
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const F32 PIXEL_BORDER_THRESHOLD = 0.0001f;
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const F32 PIXEL_CORRECTION_DISTANCE = 0.01f;
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const F32 PAD_UVY = 0.5f; // half of vertical padding between glyphs in the glyph texture
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const F32 DROP_SHADOW_SOFT_STRENGTH = 0.3f;
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F32 llfont_round_x(F32 x)
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{
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//return llfloor((x-LLFontGL::sCurOrigin.mX)/LLFontGL::sScaleX+0.5f)*LLFontGL::sScaleX+LLFontGL::sCurOrigin.mX;
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//return llfloor(x/LLFontGL::sScaleX+0.5f)*LLFontGL::sScaleY;
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return x;
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}
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F32 llfont_round_y(F32 y)
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{
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//return llfloor((y-LLFontGL::sCurOrigin.mY)/LLFontGL::sScaleY+0.5f)*LLFontGL::sScaleY+LLFontGL::sCurOrigin.mY;
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//return llfloor(y+0.5f);
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return y;
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}
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// static
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U8 LLFontGL::getStyleFromString(const std::string &style)
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{
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S32 ret = 0;
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if (style.find("NORMAL") != style.npos)
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{
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ret |= NORMAL;
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}
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if (style.find("BOLD") != style.npos)
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{
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ret |= BOLD;
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}
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if (style.find("ITALIC") != style.npos)
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{
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ret |= ITALIC;
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}
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if (style.find("UNDERLINE") != style.npos)
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{
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ret |= UNDERLINE;
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}
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if (style.find("SHADOW") != style.npos)
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{
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ret |= DROP_SHADOW;
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}
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if (style.find("SOFT_SHADOW") != style.npos)
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{
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ret |= DROP_SHADOW_SOFT;
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}
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return ret;
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}
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LLFontGL::LLFontGL()
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: LLFont()
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{
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clearEmbeddedChars();
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}
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LLFontGL::LLFontGL(const LLFontGL &source)
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{
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llerrs << "Not implemented!" << llendl;
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}
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LLFontGL::~LLFontGL()
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{
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clearEmbeddedChars();
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}
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void LLFontGL::reset()
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{
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if (!mIsFallback)
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{
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// This is the head of the list - need to rebuild ourself and all fallbacks.
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loadFace(mName,mPointSize,sVertDPI,sHorizDPI,mFontBitmapCachep->getNumComponents(),mIsFallback);
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if (mFallbackFontp==NULL)
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{
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llwarns << "LLFontGL::reset(), no fallback fonts present" << llendl;
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}
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else
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{
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for (LLFontList::iterator it = mFallbackFontp->begin();
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it != mFallbackFontp->end();
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++it)
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{
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(*it)->reset();
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}
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}
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}
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resetBitmapCache();
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}
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// static
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std::string LLFontGL::getFontPathSystem()
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{
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std::string system_path;
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// Try to figure out where the system's font files are stored.
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char *system_root = NULL;
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#if LL_WINDOWS
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system_root = getenv("SystemRoot"); /* Flawfinder: ignore */
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if (!system_root)
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{
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llwarns << "SystemRoot not found, attempting to load fonts from default path." << llendl;
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}
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#endif
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if (system_root)
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{
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system_path = llformat("%s/fonts/", system_root);
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}
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else
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{
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#if LL_WINDOWS
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// HACK for windows 98/Me
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system_path = "/WINDOWS/FONTS/";
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#elif LL_DARWIN
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// HACK for Mac OS X
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system_path = "/System/Library/Fonts/";
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#endif
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}
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return system_path;
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}
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// static
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std::string LLFontGL::getFontPathLocal()
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{
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std::string local_path;
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// Backup files if we can't load from system fonts directory.
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// We could store this in an end-user writable directory to allow
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// end users to switch fonts.
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if (LLFontGL::sAppDir.length())
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{
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// use specified application dir to look for fonts
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local_path = LLFontGL::sAppDir + "/fonts/";
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}
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else
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{
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// assume working directory is executable directory
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local_path = "./fonts/";
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}
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return local_path;
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}
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bool findOrCreateFont(LLFontGL*& fontp, const LLFontDescriptor& desc)
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{
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// Don't delete existing fonts, if any, here, because they've
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// already been deleted by LLFontRegistry::clear()
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fontp = LLFontGL::getFont(desc);
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return (fontp != NULL);
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}
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// static
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BOOL LLFontGL::initDefaultFonts(F32 screen_dpi, F32 x_scale, F32 y_scale,
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const std::string& app_dir,
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const std::vector<std::string>& xui_paths,
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bool create_gl_textures)
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{
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bool succ = true;
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sVertDPI = (F32)llfloor(screen_dpi * y_scale);
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sHorizDPI = (F32)llfloor(screen_dpi * x_scale);
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sScaleX = x_scale;
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sScaleY = y_scale;
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sAppDir = app_dir;
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// Font registry init
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if (!sFontRegistry)
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{
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sFontRegistry = new LLFontRegistry(xui_paths,create_gl_textures);
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sFontRegistry->parseFontInfo("fonts.xml");
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}
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else
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{
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sFontRegistry->reset();
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}
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// Force standard fonts to get generated up front.
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// This is primarily for error detection purposes.
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succ &= (NULL != getFontSansSerifSmall());
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succ &= (NULL != getFontSansSerif());
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succ &= (NULL != getFontSansSerifBig());
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succ &= (NULL != getFontSansSerifHuge());
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succ &= (NULL != getFontSansSerifBold());
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succ &= (NULL != getFontMonospace());
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succ &= (NULL != getFontExtChar());
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return succ;
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}
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// static
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void LLFontGL::destroyDefaultFonts()
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{
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// Remove the actual fonts.
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delete sFontRegistry;
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sFontRegistry = NULL;
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}
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//static
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void LLFontGL::destroyAllGL()
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{
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if (sFontRegistry)
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{
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if (LLFont::sOpenGLcrashOnRestart)
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{
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// This will leak memory but will prevent a crash...
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sFontRegistry = NULL;
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}
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else
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{
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sFontRegistry->destroyGL();
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}
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}
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}
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void LLFontGL::destroyGL()
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{
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mFontBitmapCachep->destroyGL();
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}
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LLFontGL &LLFontGL::operator=(const LLFontGL &source)
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{
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llerrs << "Not implemented" << llendl;
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return *this;
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}
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BOOL LLFontGL::loadFace(const std::string& filename,
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const F32 point_size, const F32 vert_dpi, const F32 horz_dpi,
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const S32 components, BOOL is_fallback)
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{
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if (!LLFont::loadFace(filename, point_size, vert_dpi, horz_dpi, components, is_fallback))
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{
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return FALSE;
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}
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return TRUE;
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}
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//static
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LLFontGL* LLFontGL::getFontMonospace()
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{
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return getFont(LLFontDescriptor("Monospace","Monospace",0));
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}
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//static
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LLFontGL* LLFontGL::getFontSansSerifSmall()
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{
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return getFont(LLFontDescriptor("SansSerif","Small",0));
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}
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//static
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LLFontGL* LLFontGL::getFontSansSerif()
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{
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return getFont(LLFontDescriptor("SansSerif","Medium",0));
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}
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//static
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LLFontGL* LLFontGL::getFontSansSerifBig()
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{
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return getFont(LLFontDescriptor("SansSerif","Large",0));
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}
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//static
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LLFontGL* LLFontGL::getFontSansSerifHuge()
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{
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return getFont(LLFontDescriptor("SansSerif","Huge",0));
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}
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//static
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LLFontGL* LLFontGL::getFontSansSerifBold()
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{
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return getFont(LLFontDescriptor("SansSerif","Medium",BOLD));
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}
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//static
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LLFontGL* LLFontGL::getFontExtChar()
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{
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return getFontSansSerif();
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}
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//static
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LLFontGL* LLFontGL::getFont(const LLFontDescriptor& desc)
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{
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return sFontRegistry->getFont(desc);
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}
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BOOL LLFontGL::addChar(const llwchar wch) const
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{
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if (!LLFont::addChar(wch))
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{
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return FALSE;
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}
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stop_glerror();
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LLFontGlyphInfo *glyph_info = getGlyphInfo(wch);
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U32 bitmap_num = glyph_info->mBitmapNum;
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LLImageGL *image_gl = mFontBitmapCachep->getImageGL(bitmap_num);
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LLImageRaw *image_raw = mFontBitmapCachep->getImageRaw(bitmap_num);
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image_gl->setSubImage(image_raw, 0, 0, image_gl->getWidth(), image_gl->getHeight());
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return TRUE;
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}
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S32 LLFontGL::renderUTF8(const std::string &text, const S32 offset,
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const F32 x, const F32 y,
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const LLColor4 &color,
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const HAlign halign, const VAlign valign,
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U8 style,
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const S32 max_chars, const S32 max_pixels,
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F32* right_x,
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BOOL use_ellipses) const
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{
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LLWString wstr = utf8str_to_wstring(text);
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return render(wstr, offset, x, y, color, halign, valign, style, max_chars, max_pixels, right_x, FALSE, use_ellipses);
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}
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S32 LLFontGL::render(const LLWString &wstr,
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const S32 begin_offset,
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const F32 x, const F32 y,
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const LLColor4 &color,
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const HAlign halign, const VAlign valign,
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U8 style,
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const S32 max_chars, S32 max_pixels,
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F32* right_x,
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BOOL use_embedded,
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BOOL use_ellipses) const
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{
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if(!sDisplayFont) //do not display texts
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{
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return wstr.length() ;
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}
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if (wstr.empty())
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{
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return 0;
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}
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gGL.getTexUnit(0)->enable(LLTexUnit::TT_TEXTURE);
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S32 scaled_max_pixels = max_pixels == S32_MAX ? S32_MAX : llceil((F32)max_pixels * sScaleX);
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// Strip off any style bits that are already accounted for by the font.
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style = style & (~getFontDesc().getStyle());
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F32 drop_shadow_strength = 0.f;
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if (style & (DROP_SHADOW | DROP_SHADOW_SOFT))
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{
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F32 luminance;
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color.calcHSL(NULL, NULL, &luminance);
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drop_shadow_strength = clamp_rescale(luminance, 0.35f, 0.6f, 0.f, 1.f);
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if (luminance < 0.35f)
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{
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style = style & ~(DROP_SHADOW | DROP_SHADOW_SOFT);
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}
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}
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gGL.pushMatrix();
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glLoadIdentity();
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gGL.translatef(floorf(sCurOrigin.mX*sScaleX), floorf(sCurOrigin.mY*sScaleY), sCurOrigin.mZ);
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// this code snaps the text origin to a pixel grid to start with
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F32 pixel_offset_x = llround((F32)sCurOrigin.mX) - (sCurOrigin.mX);
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F32 pixel_offset_y = llround((F32)sCurOrigin.mY) - (sCurOrigin.mY);
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gGL.translatef(-pixel_offset_x, -pixel_offset_y, 0.f);
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LLFastTimer t(LLFastTimer::FTM_RENDER_FONTS);
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gGL.color4fv( color.mV );
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S32 chars_drawn = 0;
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S32 i;
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S32 length;
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if (-1 == max_chars)
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{
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length = (S32)wstr.length() - begin_offset;
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}
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else
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{
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length = llmin((S32)wstr.length() - begin_offset, max_chars );
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}
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F32 cur_x, cur_y, cur_render_x, cur_render_y;
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// Not guaranteed to be set correctly
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gGL.setSceneBlendType(LLRender::BT_ALPHA);
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cur_x = ((F32)x * sScaleX);
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cur_y = ((F32)y * sScaleY);
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// Offset y by vertical alignment.
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switch (valign)
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{
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case TOP:
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cur_y -= mAscender;
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break;
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case BOTTOM:
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cur_y += mDescender;
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break;
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case VCENTER:
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cur_y -= ((mAscender - mDescender)/2.f);
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break;
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case BASELINE:
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// Baseline, do nothing.
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break;
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default:
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break;
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}
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switch (halign)
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{
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case LEFT:
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break;
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case RIGHT:
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cur_x -= llmin(scaled_max_pixels, llround(getWidthF32(wstr.c_str(), 0, length) * sScaleX));
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break;
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case HCENTER:
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cur_x -= llmin(scaled_max_pixels, llround(getWidthF32(wstr.c_str(), 0, length) * sScaleX)) / 2;
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break;
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default:
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break;
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}
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cur_render_y = cur_y;
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cur_render_x = cur_x;
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F32 start_x = cur_x;
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F32 inv_width = 1.f / mFontBitmapCachep->getBitmapWidth();
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F32 inv_height = 1.f / mFontBitmapCachep->getBitmapHeight();
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const S32 LAST_CHARACTER = LLFont::LAST_CHAR_FULL;
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|
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BOOL draw_ellipses = FALSE;
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if (use_ellipses && halign == LEFT)
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{
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// check for too long of a string
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if (getWidthF32(wstr.c_str(), 0, max_chars) * sScaleX > scaled_max_pixels)
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{
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// use four dots for ellipsis width to generate padding
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const LLWString dots(utf8str_to_wstring(std::string("....")));
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scaled_max_pixels = llmax(0, scaled_max_pixels - llround(getWidthF32(dots.c_str())));
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draw_ellipses = TRUE;
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}
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}
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// Remember last-used texture to avoid unnecesssary bind calls.
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LLImageGL *last_bound_texture = NULL;
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for (i = begin_offset; i < begin_offset + length; i++)
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{
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llwchar wch = wstr[i];
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// Handle embedded characters first, if they're enabled.
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// Embedded characters are a hack for notecards
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const embedded_data_t* ext_data = use_embedded ? getEmbeddedCharData(wch) : NULL;
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if (ext_data)
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{
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LLImageGL* ext_image = ext_data->mImage;
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const LLWString& label = ext_data->mLabel;
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F32 ext_height = (F32)ext_image->getHeight() * sScaleY;
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|
F32 ext_width = (F32)ext_image->getWidth() * sScaleX;
|
|
F32 ext_advance = (EXT_X_BEARING * sScaleX) + ext_width;
|
|
|
|
if (!label.empty())
|
|
{
|
|
ext_advance += (EXT_X_BEARING + getFontExtChar()->getWidthF32( label.c_str() )) * sScaleX;
|
|
}
|
|
|
|
if (start_x + scaled_max_pixels < cur_x + ext_advance)
|
|
{
|
|
// Not enough room for this character.
|
|
break;
|
|
}
|
|
|
|
if (last_bound_texture != ext_image)
|
|
{
|
|
gGL.getTexUnit(0)->bind(ext_image);
|
|
last_bound_texture = ext_image;
|
|
}
|
|
|
|
// snap origin to whole screen pixel
|
|
const F32 ext_x = (F32)llround(cur_render_x + (EXT_X_BEARING * sScaleX));
|
|
const F32 ext_y = (F32)llround(cur_render_y + (EXT_Y_BEARING * sScaleY + mAscender - mLineHeight));
|
|
|
|
LLRectf uv_rect(0.f, 1.f, 1.f, 0.f);
|
|
LLRectf screen_rect(ext_x, ext_y + ext_height, ext_x + ext_width, ext_y);
|
|
drawGlyph(screen_rect, uv_rect, LLColor4::white, style, drop_shadow_strength);
|
|
|
|
if (!label.empty())
|
|
{
|
|
gGL.pushMatrix();
|
|
//glLoadIdentity();
|
|
//gGL.translatef(sCurOrigin.mX, sCurOrigin.mY, 0.0f);
|
|
//glScalef(sScaleX, sScaleY, 1.f);
|
|
getFontExtChar()->render(label, 0,
|
|
/*llfloor*/((ext_x + (F32)ext_image->getWidth() + EXT_X_BEARING) / sScaleX),
|
|
/*llfloor*/(cur_y / sScaleY),
|
|
color,
|
|
halign, BASELINE, NORMAL, S32_MAX, S32_MAX, NULL,
|
|
TRUE );
|
|
gGL.popMatrix();
|
|
}
|
|
|
|
gGL.color4fv(color.mV);
|
|
|
|
chars_drawn++;
|
|
cur_x += ext_advance;
|
|
if (((i + 1) < length) && wstr[i+1])
|
|
{
|
|
cur_x += EXT_KERNING * sScaleX;
|
|
}
|
|
cur_render_x = cur_x;
|
|
}
|
|
else
|
|
{
|
|
if (!hasGlyph(wch))
|
|
{
|
|
addChar(wch);
|
|
}
|
|
|
|
const LLFontGlyphInfo* fgi= getGlyphInfo(wch);
|
|
if (!fgi)
|
|
{
|
|
llerrs << "Missing Glyph Info" << llendl;
|
|
break;
|
|
}
|
|
// Per-glyph bitmap texture.
|
|
LLImageGL *image_gl = mFontBitmapCachep->getImageGL(fgi->mBitmapNum);
|
|
if (last_bound_texture != image_gl)
|
|
{
|
|
gGL.getTexUnit(0)->bind(image_gl);
|
|
last_bound_texture = image_gl;
|
|
}
|
|
|
|
if ((start_x + scaled_max_pixels) < (cur_x + fgi->mXBearing + fgi->mWidth))
|
|
{
|
|
// Not enough room for this character.
|
|
break;
|
|
}
|
|
|
|
// Draw the text at the appropriate location
|
|
//Specify vertices and texture coordinates
|
|
LLRectf uv_rect((fgi->mXBitmapOffset) * inv_width,
|
|
(fgi->mYBitmapOffset + fgi->mHeight + PAD_UVY) * inv_height,
|
|
(fgi->mXBitmapOffset + fgi->mWidth) * inv_width,
|
|
(fgi->mYBitmapOffset - PAD_UVY) * inv_height);
|
|
// snap glyph origin to whole screen pixel
|
|
LLRectf screen_rect(llround(cur_render_x + (F32)fgi->mXBearing),
|
|
llround(cur_render_y + (F32)fgi->mYBearing),
|
|
llround(cur_render_x + (F32)fgi->mXBearing) + (F32)fgi->mWidth,
|
|
llround(cur_render_y + (F32)fgi->mYBearing) - (F32)fgi->mHeight);
|
|
|
|
drawGlyph(screen_rect, uv_rect, color, style, drop_shadow_strength);
|
|
|
|
chars_drawn++;
|
|
cur_x += fgi->mXAdvance;
|
|
cur_y += fgi->mYAdvance;
|
|
|
|
llwchar next_char = wstr[i+1];
|
|
if (next_char && (next_char < LAST_CHARACTER))
|
|
{
|
|
// Kern this puppy.
|
|
if (!hasGlyph(next_char))
|
|
{
|
|
addChar(next_char);
|
|
}
|
|
cur_x += getXKerning(wch, next_char);
|
|
}
|
|
|
|
// Round after kerning.
|
|
// Must do this to cur_x, not just to cur_render_x, otherwise you
|
|
// will squish sub-pixel kerned characters too close together.
|
|
// For example, "CCCCC" looks bad.
|
|
cur_x = (F32)llfloor(cur_x + 0.5f);
|
|
//cur_y = (F32)llfloor(cur_y + 0.5f);
|
|
|
|
cur_render_x = cur_x;
|
|
cur_render_y = cur_y;
|
|
}
|
|
}
|
|
|
|
if (right_x)
|
|
{
|
|
*right_x = cur_x / sScaleX;
|
|
}
|
|
|
|
if (style & UNDERLINE)
|
|
{
|
|
gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
|
|
gGL.begin(LLRender::LINES);
|
|
gGL.vertex2f(start_x, cur_y - (mDescender));
|
|
gGL.vertex2f(cur_x, cur_y - (mDescender));
|
|
gGL.end();
|
|
}
|
|
|
|
// *FIX: get this working in all alignment cases, etc.
|
|
if (draw_ellipses)
|
|
{
|
|
// recursively render ellipses at end of string
|
|
// we've already reserved enough room
|
|
gGL.pushMatrix();
|
|
//glLoadIdentity();
|
|
//gGL.translatef(sCurOrigin.mX, sCurOrigin.mY, 0.0f);
|
|
//glScalef(sScaleX, sScaleY, 1.f);
|
|
renderUTF8(std::string("..."),
|
|
0,
|
|
cur_x / sScaleX, (F32)y,
|
|
color,
|
|
LEFT, valign,
|
|
style,
|
|
S32_MAX, max_pixels,
|
|
right_x,
|
|
FALSE);
|
|
gGL.popMatrix();
|
|
}
|
|
|
|
gGL.popMatrix();
|
|
|
|
return chars_drawn;
|
|
}
|
|
|
|
|
|
S32 LLFontGL::getWidth(const std::string& utf8text) const
|
|
{
|
|
LLWString wtext = utf8str_to_wstring(utf8text);
|
|
return getWidth(wtext.c_str(), 0, S32_MAX);
|
|
}
|
|
|
|
S32 LLFontGL::getWidth(const llwchar* wchars) const
|
|
{
|
|
return getWidth(wchars, 0, S32_MAX);
|
|
}
|
|
|
|
S32 LLFontGL::getWidth(const std::string& utf8text, const S32 begin_offset, const S32 max_chars) const
|
|
{
|
|
LLWString wtext = utf8str_to_wstring(utf8text);
|
|
return getWidth(wtext.c_str(), begin_offset, max_chars);
|
|
}
|
|
|
|
S32 LLFontGL::getWidth(const llwchar* wchars, const S32 begin_offset, const S32 max_chars, BOOL use_embedded) const
|
|
{
|
|
F32 width = getWidthF32(wchars, begin_offset, max_chars, use_embedded);
|
|
return llround(width);
|
|
}
|
|
|
|
F32 LLFontGL::getWidthF32(const std::string& utf8text) const
|
|
{
|
|
LLWString wtext = utf8str_to_wstring(utf8text);
|
|
return getWidthF32(wtext.c_str(), 0, S32_MAX);
|
|
}
|
|
|
|
F32 LLFontGL::getWidthF32(const llwchar* wchars) const
|
|
{
|
|
return getWidthF32(wchars, 0, S32_MAX);
|
|
}
|
|
|
|
F32 LLFontGL::getWidthF32(const std::string& utf8text, const S32 begin_offset, const S32 max_chars ) const
|
|
{
|
|
LLWString wtext = utf8str_to_wstring(utf8text);
|
|
return getWidthF32(wtext.c_str(), begin_offset, max_chars);
|
|
}
|
|
|
|
F32 LLFontGL::getWidthF32(const llwchar* wchars, const S32 begin_offset, const S32 max_chars, BOOL use_embedded) const
|
|
{
|
|
const S32 LAST_CHARACTER = LLFont::LAST_CHAR_FULL;
|
|
|
|
F32 cur_x = 0;
|
|
const S32 max_index = begin_offset + max_chars;
|
|
for (S32 i = begin_offset; i < max_index; i++)
|
|
{
|
|
const llwchar wch = wchars[i];
|
|
if (wch == 0)
|
|
{
|
|
break; // done
|
|
}
|
|
const embedded_data_t* ext_data = use_embedded ? getEmbeddedCharData(wch) : NULL;
|
|
if (ext_data)
|
|
{
|
|
// Handle crappy embedded hack
|
|
cur_x += getEmbeddedCharAdvance(ext_data);
|
|
|
|
if( ((i+1) < max_chars) && (i+1 < max_index))
|
|
{
|
|
cur_x += EXT_KERNING * sScaleX;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
cur_x += getXAdvance(wch);
|
|
llwchar next_char = wchars[i+1];
|
|
|
|
if (((i + 1) < max_chars)
|
|
&& next_char
|
|
&& (next_char < LAST_CHARACTER))
|
|
{
|
|
// Kern this puppy.
|
|
cur_x += getXKerning(wch, next_char);
|
|
}
|
|
}
|
|
// Round after kerning.
|
|
cur_x = (F32)llfloor(cur_x + 0.5f);
|
|
}
|
|
|
|
return cur_x / sScaleX;
|
|
}
|
|
|
|
|
|
|
|
// Returns the max number of complete characters from text (up to max_chars) that can be drawn in max_pixels
|
|
S32 LLFontGL::maxDrawableChars(const llwchar* wchars, F32 max_pixels, S32 max_chars,
|
|
BOOL end_on_word_boundary, const BOOL use_embedded,
|
|
F32* drawn_pixels) const
|
|
{
|
|
if (!wchars || !wchars[0] || max_chars == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
//llassert(max_pixels >= 0.f);
|
|
//llassert(max_chars >= 0);
|
|
if(max_pixels < 0.f || max_chars < 0) {
|
|
return 0;
|
|
}
|
|
|
|
BOOL clip = FALSE;
|
|
F32 cur_x = 0;
|
|
F32 drawn_x = 0;
|
|
|
|
S32 start_of_last_word = 0;
|
|
BOOL in_word = FALSE;
|
|
|
|
F32 scaled_max_pixels = (F32)llceil(max_pixels * sScaleX);
|
|
|
|
S32 i;
|
|
for (i=0; (i < max_chars); i++)
|
|
{
|
|
llwchar wch = wchars[i];
|
|
|
|
if(wch == 0)
|
|
{
|
|
// Null terminator. We're done.
|
|
break;
|
|
}
|
|
|
|
const embedded_data_t* ext_data = use_embedded ? getEmbeddedCharData(wch) : NULL;
|
|
if (ext_data)
|
|
{
|
|
if (in_word)
|
|
{
|
|
in_word = FALSE;
|
|
}
|
|
else
|
|
{
|
|
start_of_last_word = i;
|
|
}
|
|
cur_x += getEmbeddedCharAdvance(ext_data);
|
|
|
|
if (scaled_max_pixels < cur_x)
|
|
{
|
|
clip = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (((i+1) < max_chars) && wchars[i+1])
|
|
{
|
|
cur_x += EXT_KERNING * sScaleX;
|
|
}
|
|
|
|
if( scaled_max_pixels < cur_x )
|
|
{
|
|
clip = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (in_word)
|
|
{
|
|
if (iswspace(wch))
|
|
{
|
|
in_word = FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
start_of_last_word = i;
|
|
if (!iswspace(wch))
|
|
{
|
|
in_word = TRUE;
|
|
}
|
|
}
|
|
|
|
cur_x += getXAdvance(wch);
|
|
|
|
if (scaled_max_pixels < cur_x)
|
|
{
|
|
clip = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (((i+1) < max_chars) && wchars[i+1])
|
|
{
|
|
// Kern this puppy.
|
|
cur_x += getXKerning(wch, wchars[i+1]);
|
|
}
|
|
}
|
|
// Round after kerning.
|
|
cur_x = (F32)llfloor(cur_x + 0.5f);
|
|
drawn_x = cur_x;
|
|
}
|
|
|
|
if( clip && end_on_word_boundary && (start_of_last_word != 0) )
|
|
{
|
|
i = start_of_last_word;
|
|
}
|
|
if (drawn_pixels)
|
|
{
|
|
*drawn_pixels = drawn_x;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
|
|
S32 LLFontGL::firstDrawableChar(const llwchar* wchars, F32 max_pixels, S32 text_len, S32 start_pos, S32 max_chars) const
|
|
{
|
|
if (!wchars || !wchars[0] || max_chars == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
F32 total_width = 0.0;
|
|
S32 drawable_chars = 0;
|
|
|
|
F32 scaled_max_pixels = max_pixels * sScaleX;
|
|
|
|
S32 start = llmin(start_pos, text_len - 1);
|
|
for (S32 i = start; i >= 0; i--)
|
|
{
|
|
llwchar wch = wchars[i];
|
|
|
|
const embedded_data_t* ext_data = getEmbeddedCharData(wch);
|
|
F32 char_width = ext_data ? getEmbeddedCharAdvance(ext_data) : getXAdvance(wch);
|
|
|
|
if( scaled_max_pixels < (total_width + char_width) )
|
|
{
|
|
break;
|
|
}
|
|
|
|
total_width += char_width;
|
|
drawable_chars++;
|
|
|
|
if( max_chars >= 0 && drawable_chars >= max_chars )
|
|
{
|
|
break;
|
|
}
|
|
|
|
if ( i > 0 )
|
|
{
|
|
// kerning
|
|
total_width += ext_data ? (EXT_KERNING * sScaleX) : getXKerning(wchars[i-1], wch);
|
|
}
|
|
|
|
// Round after kerning.
|
|
total_width = llround(total_width);
|
|
}
|
|
|
|
return start_pos - drawable_chars;
|
|
}
|
|
|
|
|
|
S32 LLFontGL::charFromPixelOffset(const llwchar* wchars, const S32 begin_offset, F32 target_x, F32 max_pixels, S32 max_chars, BOOL round, BOOL use_embedded) const
|
|
{
|
|
if (!wchars || !wchars[0] || max_chars == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
F32 cur_x = 0;
|
|
S32 pos = 0;
|
|
|
|
target_x *= sScaleX;
|
|
|
|
// max_chars is S32_MAX by default, so make sure we don't get overflow
|
|
const S32 max_index = begin_offset + llmin(S32_MAX - begin_offset, max_chars);
|
|
|
|
F32 scaled_max_pixels = max_pixels * sScaleX;
|
|
|
|
for (S32 i = begin_offset; (i < max_index); i++)
|
|
{
|
|
llwchar wch = wchars[i];
|
|
if (!wch)
|
|
{
|
|
break; // done
|
|
}
|
|
const embedded_data_t* ext_data = use_embedded ? getEmbeddedCharData(wch) : NULL;
|
|
if (ext_data)
|
|
{
|
|
F32 ext_advance = getEmbeddedCharAdvance(ext_data);
|
|
|
|
if (round)
|
|
{
|
|
// Note: if the mouse is on the left half of the character, the pick is to the character's left
|
|
// If it's on the right half, the pick is to the right.
|
|
if (target_x < cur_x + ext_advance/2)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (target_x < cur_x + ext_advance)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (scaled_max_pixels < cur_x + ext_advance)
|
|
{
|
|
break;
|
|
}
|
|
|
|
pos++;
|
|
cur_x += ext_advance;
|
|
|
|
if (((i + 1) < max_index)
|
|
&& (wchars[(i + 1)]))
|
|
{
|
|
cur_x += EXT_KERNING * sScaleX;
|
|
}
|
|
// Round after kerning.
|
|
cur_x = (F32)llfloor(cur_x + 0.5f);
|
|
}
|
|
else
|
|
{
|
|
F32 char_width = getXAdvance(wch);
|
|
|
|
if (round)
|
|
{
|
|
// Note: if the mouse is on the left half of the character, the pick is to the character's left
|
|
// If it's on the right half, the pick is to the right.
|
|
if (target_x < cur_x + char_width*0.5f)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
else if (target_x < cur_x + char_width)
|
|
{
|
|
break;
|
|
}
|
|
|
|
if (scaled_max_pixels < cur_x + char_width)
|
|
{
|
|
break;
|
|
}
|
|
|
|
pos++;
|
|
cur_x += char_width;
|
|
|
|
if (((i + 1) < max_index)
|
|
&& (wchars[(i + 1)]))
|
|
{
|
|
llwchar next_char = wchars[i + 1];
|
|
// Kern this puppy.
|
|
cur_x += getXKerning(wch, next_char);
|
|
}
|
|
|
|
// Round after kerning.
|
|
cur_x = (F32)llfloor(cur_x + 0.5f);
|
|
}
|
|
}
|
|
|
|
return pos;
|
|
}
|
|
|
|
|
|
const LLFontGL::embedded_data_t* LLFontGL::getEmbeddedCharData(const llwchar wch) const
|
|
{
|
|
// Handle crappy embedded hack
|
|
embedded_map_t::const_iterator iter = mEmbeddedChars.find(wch);
|
|
if (iter != mEmbeddedChars.end())
|
|
{
|
|
return iter->second;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
F32 LLFontGL::getEmbeddedCharAdvance(const embedded_data_t* ext_data) const
|
|
{
|
|
const LLWString& label = ext_data->mLabel;
|
|
LLImageGL* ext_image = ext_data->mImage;
|
|
|
|
F32 ext_width = (F32)ext_image->getWidth();
|
|
if( !label.empty() )
|
|
{
|
|
ext_width += (EXT_X_BEARING + getFontExtChar()->getWidthF32(label.c_str())) * sScaleX;
|
|
}
|
|
|
|
return (EXT_X_BEARING * sScaleX) + ext_width;
|
|
}
|
|
|
|
|
|
void LLFontGL::clearEmbeddedChars()
|
|
{
|
|
for_each(mEmbeddedChars.begin(), mEmbeddedChars.end(), DeletePairedPointer());
|
|
mEmbeddedChars.clear();
|
|
}
|
|
|
|
void LLFontGL::addEmbeddedChar( llwchar wc, LLImageGL* image, const std::string& label ) const
|
|
{
|
|
LLWString wlabel = utf8str_to_wstring(label);
|
|
addEmbeddedChar(wc, image, wlabel);
|
|
}
|
|
|
|
void LLFontGL::addEmbeddedChar( llwchar wc, LLImageGL* image, const LLWString& wlabel ) const
|
|
{
|
|
embedded_data_t* ext_data = new embedded_data_t(image, wlabel);
|
|
mEmbeddedChars[wc] = ext_data;
|
|
}
|
|
|
|
void LLFontGL::removeEmbeddedChar( llwchar wc ) const
|
|
{
|
|
embedded_map_t::iterator iter = mEmbeddedChars.find(wc);
|
|
if (iter != mEmbeddedChars.end())
|
|
{
|
|
delete iter->second;
|
|
mEmbeddedChars.erase(wc);
|
|
}
|
|
}
|
|
|
|
|
|
void LLFontGL::renderQuad(const LLRectf& screen_rect, const LLRectf& uv_rect, F32 slant_amt) const
|
|
{
|
|
gGL.texCoord2f(uv_rect.mRight, uv_rect.mTop);
|
|
gGL.vertex2f(llfont_round_x(screen_rect.mRight),
|
|
llfont_round_y(screen_rect.mTop));
|
|
|
|
gGL.texCoord2f(uv_rect.mLeft, uv_rect.mTop);
|
|
gGL.vertex2f(llfont_round_x(screen_rect.mLeft),
|
|
llfont_round_y(screen_rect.mTop));
|
|
|
|
gGL.texCoord2f(uv_rect.mLeft, uv_rect.mBottom);
|
|
gGL.vertex2f(llfont_round_x(screen_rect.mLeft + slant_amt),
|
|
llfont_round_y(screen_rect.mBottom));
|
|
|
|
gGL.texCoord2f(uv_rect.mRight, uv_rect.mBottom);
|
|
gGL.vertex2f(llfont_round_x(screen_rect.mRight + slant_amt),
|
|
llfont_round_y(screen_rect.mBottom));
|
|
}
|
|
|
|
void LLFontGL::drawGlyph(const LLRectf& screen_rect, const LLRectf& uv_rect, const LLColor4& color, U8 style, F32 drop_shadow_strength) const
|
|
{
|
|
F32 slant_offset;
|
|
slant_offset = ((style & ITALIC) ? ( -mAscender * 0.2f) : 0.f);
|
|
|
|
gGL.begin(LLRender::QUADS);
|
|
{
|
|
//FIXME: bold and drop shadow are mutually exclusive only for convenience
|
|
//Allow both when we need them.
|
|
if (style & BOLD)
|
|
{
|
|
gGL.color4fv(color.mV);
|
|
for (S32 pass = 0; pass < 2; pass++)
|
|
{
|
|
LLRectf screen_rect_offset = screen_rect;
|
|
|
|
screen_rect_offset.translate((F32)(pass * BOLD_OFFSET), 0.f);
|
|
renderQuad(screen_rect_offset, uv_rect, slant_offset);
|
|
}
|
|
}
|
|
else if (style & DROP_SHADOW_SOFT)
|
|
{
|
|
LLColor4 shadow_color = LLFontGL::sShadowColor;
|
|
shadow_color.mV[VALPHA] = color.mV[VALPHA] * drop_shadow_strength * DROP_SHADOW_SOFT_STRENGTH;
|
|
gGL.color4fv(shadow_color.mV);
|
|
for (S32 pass = 0; pass < 5; pass++)
|
|
{
|
|
LLRectf screen_rect_offset = screen_rect;
|
|
|
|
switch(pass)
|
|
{
|
|
case 0:
|
|
screen_rect_offset.translate(-1.f, -1.f);
|
|
break;
|
|
case 1:
|
|
screen_rect_offset.translate(1.f, -1.f);
|
|
break;
|
|
case 2:
|
|
screen_rect_offset.translate(1.f, 1.f);
|
|
break;
|
|
case 3:
|
|
screen_rect_offset.translate(-1.f, 1.f);
|
|
break;
|
|
case 4:
|
|
screen_rect_offset.translate(0, -2.f);
|
|
break;
|
|
}
|
|
|
|
renderQuad(screen_rect_offset, uv_rect, slant_offset);
|
|
}
|
|
gGL.color4fv(color.mV);
|
|
renderQuad(screen_rect, uv_rect, slant_offset);
|
|
}
|
|
else if (style & DROP_SHADOW)
|
|
{
|
|
LLColor4 shadow_color = LLFontGL::sShadowColor;
|
|
shadow_color.mV[VALPHA] = color.mV[VALPHA] * drop_shadow_strength;
|
|
gGL.color4fv(shadow_color.mV);
|
|
LLRectf screen_rect_shadow = screen_rect;
|
|
screen_rect_shadow.translate(1.f, -1.f);
|
|
renderQuad(screen_rect_shadow, uv_rect, slant_offset);
|
|
gGL.color4fv(color.mV);
|
|
renderQuad(screen_rect, uv_rect, slant_offset);
|
|
}
|
|
else // normal rendering
|
|
{
|
|
gGL.color4fv(color.mV);
|
|
renderQuad(screen_rect, uv_rect, slant_offset);
|
|
}
|
|
|
|
}
|
|
gGL.end();
|
|
}
|
|
|
|
std::string LLFontGL::nameFromFont(const LLFontGL* fontp)
|
|
{
|
|
return fontp->getFontDesc().getName();
|
|
}
|
|
|
|
// static
|
|
std::string LLFontGL::nameFromHAlign(LLFontGL::HAlign align)
|
|
{
|
|
if (align == LEFT) return std::string("left");
|
|
else if (align == RIGHT) return std::string("right");
|
|
else if (align == HCENTER) return std::string("center");
|
|
else return std::string();
|
|
}
|
|
|
|
// static
|
|
LLFontGL::HAlign LLFontGL::hAlignFromName(const std::string& name)
|
|
{
|
|
LLFontGL::HAlign gl_hfont_align = LLFontGL::LEFT;
|
|
if (name == "left")
|
|
{
|
|
gl_hfont_align = LLFontGL::LEFT;
|
|
}
|
|
else if (name == "right")
|
|
{
|
|
gl_hfont_align = LLFontGL::RIGHT;
|
|
}
|
|
else if (name == "center")
|
|
{
|
|
gl_hfont_align = LLFontGL::HCENTER;
|
|
}
|
|
//else leave left
|
|
return gl_hfont_align;
|
|
}
|
|
|
|
// static
|
|
std::string LLFontGL::nameFromVAlign(LLFontGL::VAlign align)
|
|
{
|
|
if (align == TOP) return std::string("top");
|
|
else if (align == VCENTER) return std::string("center");
|
|
else if (align == BASELINE) return std::string("baseline");
|
|
else if (align == BOTTOM) return std::string("bottom");
|
|
else return std::string();
|
|
}
|
|
|
|
// static
|
|
LLFontGL::VAlign LLFontGL::vAlignFromName(const std::string& name)
|
|
{
|
|
LLFontGL::VAlign gl_vfont_align = LLFontGL::BASELINE;
|
|
if (name == "top")
|
|
{
|
|
gl_vfont_align = LLFontGL::TOP;
|
|
}
|
|
else if (name == "center")
|
|
{
|
|
gl_vfont_align = LLFontGL::VCENTER;
|
|
}
|
|
else if (name == "baseline")
|
|
{
|
|
gl_vfont_align = LLFontGL::BASELINE;
|
|
}
|
|
else if (name == "bottom")
|
|
{
|
|
gl_vfont_align = LLFontGL::BOTTOM;
|
|
}
|
|
//else leave baseline
|
|
return gl_vfont_align;
|
|
}
|