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Protect font initialization with mutex

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fixes #4532
This commit is contained in:
sfan5 2021-12-17 23:49:47 +01:00
parent b2409b14d0
commit 49f7d2494c
2 changed files with 14 additions and 39 deletions
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46
src/client/fontengine.cpp
View File

@ -84,11 +84,13 @@ FontEngine::~FontEngine()
/******************************************************************************/
void FontEngine::cleanCache()
{
RecursiveMutexAutoLock l(m_font_mutex);
for (auto &font_cache_it : m_font_cache) {
for (auto &font_it : font_cache_it) {
font_it.second->drop();
font_it.second = NULL;
font_it.second = nullptr;
}
font_cache_it.clear();
}
@ -122,6 +124,8 @@ irr::gui::IGUIFont *FontEngine::getFont(FontSpec spec, bool may_fail)
if (spec.size == FONT_SIZE_UNSPECIFIED)
spec.size = m_default_size[spec.mode];
RecursiveMutexAutoLock l(m_font_mutex);
const auto &cache = m_font_cache[spec.getHash()];
auto it = cache.find(spec.size);
if (it != cache.end())
@ -149,13 +153,7 @@ irr::gui::IGUIFont *FontEngine::getFont(FontSpec spec, bool may_fail)
/******************************************************************************/
unsigned int FontEngine::getTextHeight(const FontSpec &spec)
{
irr::gui::IGUIFont *font = getFont(spec);
// use current skin font as fallback
if (font == NULL) {
font = m_env->getSkin()->getFont();
}
FATAL_ERROR_IF(font == NULL, "Could not get skin font");
gui::IGUIFont *font = getFont(spec);
return font->getDimension(L"Some unimportant example String").Height;
}
@ -163,28 +161,15 @@ unsigned int FontEngine::getTextHeight(const FontSpec &spec)
/******************************************************************************/
unsigned int FontEngine::getTextWidth(const std::wstring &text, const FontSpec &spec)
{
irr::gui::IGUIFont *font = getFont(spec);
// use current skin font as fallback
if (font == NULL) {
font = m_env->getSkin()->getFont();
}
FATAL_ERROR_IF(font == NULL, "Could not get font");
gui::IGUIFont *font = getFont(spec);
return font->getDimension(text.c_str()).Width;
}
/** get line height for a specific font (including empty room between lines) */
unsigned int FontEngine::getLineHeight(const FontSpec &spec)
{
irr::gui::IGUIFont *font = getFont(spec);
// use current skin font as fallback
if (font == NULL) {
font = m_env->getSkin()->getFont();
}
FATAL_ERROR_IF(font == NULL, "Could not get font");
gui::IGUIFont *font = getFont(spec);
return font->getDimension(L"Some unimportant example String").Height
+ font->getKerningHeight();
@ -238,22 +223,9 @@ void FontEngine::readSettings()
void FontEngine::updateSkin()
{
gui::IGUIFont *font = getFont();
assert(font);
if (font)
m_env->getSkin()->setFont(font);
else
errorstream << "FontEngine: Default font file: " <<
"\n\t\"" << g_settings->get("font_path") << "\"" <<
"\n\trequired for current screen configuration was not found" <<
" or was invalid file format." <<
"\n\tUsing irrlicht default font." << std::endl;
// If we did fail to create a font our own make irrlicht find a default one
font = m_env->getSkin()->getFont();
FATAL_ERROR_IF(font == NULL, "Could not create/get font");
u32 text_height = font->getDimension(L"Hello, world!").Height;
infostream << "FontEngine: measured text_height=" << text_height << std::endl;
}
/******************************************************************************/

5
src/client/fontengine.h
View File

@ -20,13 +20,13 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#pragma once
#include <map>
#include <vector>
#include "util/basic_macros.h"
#include "irrlichttypes.h"
#include <IGUIFont.h>
#include <IGUISkin.h>
#include <IGUIEnvironment.h>
#include "settings.h"
#include "threading/mutex_auto_lock.h"
#define FONT_SIZE_UNSPECIFIED 0xFFFFFFFF
@ -152,6 +152,9 @@ private:
/** pointer to irrlicht gui environment */
gui::IGUIEnvironment* m_env = nullptr;
/** mutex used to protect font init and cache */
std::recursive_mutex m_font_mutex;
/** internal storage for caching fonts of different size */
std::map<unsigned int, irr::gui::IGUIFont*> m_font_cache[FM_MaxMode << 2];