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Conf.example: Update using auto-generation
[dragonfireclient.git] / src / fontengine.cpp
diff --git a/src/fontengine.cpp b/src/fontengine.cpp
index f73f47ff7f4135225c2e599a1120c16fb8659967..7ae0f32ed1dc014370a8255fba913b67d9299282 100644 (file)
--- a/src/fontengine.cpp
+++ b/src/fontengine.cpp
@@ -16,17 +16,16 @@ You should have received a copy of the GNU Lesser General Public License along
 with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
+
 #include "fontengine.h"
-#include "log.h"
-#include "main.h"
+#include "client/renderingengine.h"
 #include "config.h"
 #include "porting.h"
-#include "constants.h"
 #include "filesys.h"
 
 #if USE_FREETYPE
 #include "gettext.h"
-#include "xCGUITTFont.h"
+#include "irrlicht_changes/CGUITTFont.h"
 #endif
 
 /** maximum size distance for getting a "similar" font size */
@@ -36,29 +35,24 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 FontEngine* g_fontengine = NULL;
 
 /** callback to be used on change of font size setting */
-static void font_setting_changed(const std::string) {
+static void font_setting_changed(const std::string &name, void *userdata)
+{
        g_fontengine->readSettings();
 }
 
 /******************************************************************************/
 FontEngine::FontEngine(Settings* main_settings, gui::IGUIEnvironment* env) :
        m_settings(main_settings),
-       m_env(env),
-       m_font_cache(),
-       m_default_size(),
-       m_currentMode(FM_Standard),
-       m_lastMode(),
-       m_lastSize(0),
-       m_lastFont(NULL)
+       m_env(env)
 {
 
-       for ( unsigned int i = 0; i < FM_MaxMode; i++) {
-               m_default_size[i] = (FontMode) FONT_SIZE_UNSPECIFIED;
+       for (u32 &i : m_default_size) {
+               i = (FontMode) FONT_SIZE_UNSPECIFIED;
        }
 
-       assert(m_settings != NULL);
-       assert(m_env != NULL);
-       assert(m_env->getSkin() != NULL);
+       assert(m_settings != NULL); // pre-condition
+       assert(m_env != NULL); // pre-condition
+       assert(m_env->getSkin() != NULL); // pre-condition
 
        m_currentMode = FM_Simple;
 
@@ -92,22 +86,22 @@ FontEngine::FontEngine(Settings* main_settings, gui::IGUIEnvironment* env) :
        updateSkin();
 
        if (m_currentMode == FM_Standard) {
-               m_settings->registerChangedCallback("font_size", font_setting_changed);
-               m_settings->registerChangedCallback("font_path", font_setting_changed);
-               m_settings->registerChangedCallback("font_shadow", font_setting_changed);
-               m_settings->registerChangedCallback("font_shadow_alpha", font_setting_changed);
+               m_settings->registerChangedCallback("font_size", font_setting_changed, NULL);
+               m_settings->registerChangedCallback("font_path", font_setting_changed, NULL);
+               m_settings->registerChangedCallback("font_shadow", font_setting_changed, NULL);
+               m_settings->registerChangedCallback("font_shadow_alpha", font_setting_changed, NULL);
        }
        else if (m_currentMode == FM_Fallback) {
-               m_settings->registerChangedCallback("fallback_font_size", font_setting_changed);
-               m_settings->registerChangedCallback("fallback_font_path", font_setting_changed);
-               m_settings->registerChangedCallback("fallback_font_shadow", font_setting_changed);
-               m_settings->registerChangedCallback("fallback_font_shadow_alpha", font_setting_changed);
+               m_settings->registerChangedCallback("fallback_font_size", font_setting_changed, NULL);
+               m_settings->registerChangedCallback("fallback_font_path", font_setting_changed, NULL);
+               m_settings->registerChangedCallback("fallback_font_shadow", font_setting_changed, NULL);
+               m_settings->registerChangedCallback("fallback_font_shadow_alpha", font_setting_changed, NULL);
        }
 
-       m_settings->registerChangedCallback("mono_font_path", font_setting_changed);
-       m_settings->registerChangedCallback("mono_font_size", font_setting_changed);
-       m_settings->registerChangedCallback("screen_dpi", font_setting_changed);
-       m_settings->registerChangedCallback("gui_scaling", font_setting_changed);
+       m_settings->registerChangedCallback("mono_font_path", font_setting_changed, NULL);
+       m_settings->registerChangedCallback("mono_font_size", font_setting_changed, NULL);
+       m_settings->registerChangedCallback("screen_dpi", font_setting_changed, NULL);
+       m_settings->registerChangedCallback("gui_scaling", font_setting_changed, NULL);
 }
 
 /******************************************************************************/
@@ -119,15 +113,13 @@ FontEngine::~FontEngine()
 /******************************************************************************/
 void FontEngine::cleanCache()
 {
-       for ( unsigned int i = 0; i < FM_MaxMode; i++) {
+       for (auto &font_cache_it : m_font_cache) {
 
-               for (std::map<unsigned int, irr::gui::IGUIFont*>::iterator iter
-                               = m_font_cache[i].begin();
-                               iter != m_font_cache[i].end(); iter++) {
-                       iter->second->drop();
-                       iter->second = NULL;
+               for (auto &font_it : font_cache_it) {
+                       font_it.second->drop();
+                       font_it.second = NULL;
                }
-               m_font_cache[i].clear();
+               font_cache_it.clear();
        }
 }
 
@@ -173,7 +165,7 @@ unsigned int FontEngine::getTextHeight(unsigned int font_size, FontMode mode)
        if (font == NULL) {
                font = m_env->getSkin()->getFont();
        }
-       assert(font != NULL);
+       FATAL_ERROR_IF(font == NULL, "Could not get skin font");
 
        return font->getDimension(L"Some unimportant example String").Height;
 }
@@ -188,7 +180,7 @@ unsigned int FontEngine::getTextWidth(const std::wstring& text,
        if (font == NULL) {
                font = m_env->getSkin()->getFont();
        }
-       assert(font != NULL);
+       FATAL_ERROR_IF(font == NULL, "Could not get font");
 
        return font->getDimension(text.c_str()).Width;
 }
@@ -203,7 +195,7 @@ unsigned int FontEngine::getLineHeight(unsigned int font_size, FontMode mode)
        if (font == NULL) {
                font = m_env->getSkin()->getFont();
        }
-       assert(font != NULL);
+       FATAL_ERROR_IF(font == NULL, "Could not get font");
 
        return font->getDimension(L"Some unimportant example String").Height
                        + font->getKerningHeight();
@@ -256,7 +248,7 @@ void FontEngine::updateSkin()
 
        // If we did fail to create a font our own make irrlicht find a default one
        font = m_env->getSkin()->getFont();
-       assert(font);
+       FATAL_ERROR_IF(font == NULL, "Could not create/get font");
 
        u32 text_height = font->getDimension(L"Hello, world!").Height;
        infostream << "text_height=" << text_height << std::endl;
@@ -320,10 +312,8 @@ void FontEngine::initFont(unsigned int basesize, FontMode mode)
                if (! is_yes(m_settings->get("freetype"))) {
                        return;
                }
-               unsigned int size = floor(
-                               porting::getDisplayDensity() *
-                               m_settings->getFloat("gui_scaling") *
-                               basesize);
+               unsigned int size = floor(RenderingEngine::getDisplayDensity() *
+                               m_settings->getFloat("gui_scaling") * basesize);
                u32 font_shadow       = 0;
                u32 font_shadow_alpha = 0;
 
@@ -338,23 +328,37 @@ void FontEngine::initFont(unsigned int basesize, FontMode mode)
 
                std::string font_path = g_settings->get(font_config_prefix + "font_path");
 
-               if (font_path.substr(font_path.length() -4) != ".ttf") {
-                       errorstream << "FontEngine: \"" << font_path
-                                       << "\" doesn't seem to be a ttf File." << std::endl;
-                       return;
-               }
-
                irr::gui::IGUIFont* font = gui::CGUITTFont::createTTFont(m_env,
                                font_path.c_str(), size, true, true, font_shadow,
                                font_shadow_alpha);
 
                if (font != NULL) {
                        m_font_cache[mode][basesize] = font;
+                       return;
                }
-               else {
-                       errorstream << "FontEngine: failed to load freetype font: "
-                                       << font_path << std::endl;
+
+               // try fallback font
+               errorstream << "FontEngine: failed to load: " << font_path << ", trying to fall back "
+                               "to fallback font" << std::endl;
+
+               font_path = g_settings->get(font_config_prefix + "fallback_font_path");
+
+               font = gui::CGUITTFont::createTTFont(m_env,
+                       font_path.c_str(), size, true, true, font_shadow,
+                       font_shadow_alpha);
+
+               if (font != NULL) {
+                       m_font_cache[mode][basesize] = font;
+                       return;
                }
+
+               // give up
+               errorstream << "FontEngine: failed to load freetype font: "
+                               << font_path << std::endl;
+               errorstream << "minetest can not continue without a valid font. Please correct "
+                               "the 'font_path' setting or install the font file in the proper "
+                               "location" << std::endl;
+               abort();
        }
 #endif
 }
@@ -362,9 +366,9 @@ void FontEngine::initFont(unsigned int basesize, FontMode mode)
 /** initialize a font without freetype */
 void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
 {
-       assert((mode == FM_Simple) || (mode == FM_SimpleMono));
+       assert(mode == FM_Simple || mode == FM_SimpleMono); // pre-condition
 
-       std::string font_path = "";
+       std::string font_path;
        if (mode == FM_Simple) {
                font_path = m_settings->get("font_path");
        } else {
@@ -379,7 +383,7 @@ void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
                return;
        }
 
-       if ((ending == ".xml") || ( ending == ".png")) {
+       if ((ending == ".xml") || (ending == ".png")) {
                basename = font_path.substr(0,font_path.length()-4);
        }
 
@@ -387,7 +391,7 @@ void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
                basesize = DEFAULT_FONT_SIZE;
 
        unsigned int size = floor(
-                       porting::getDisplayDensity() *
+                       RenderingEngine::getDisplayDensity() *
                        m_settings->getFloat("gui_scaling") *
                        basesize);
 
@@ -456,6 +460,7 @@ void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
        }
 
        if (font != NULL) {
+               font->grab();
                m_font_cache[mode][basesize] = font;
        }
 }
Dragonfireclient is an utility client for the Voxelengine minetest (http://minetest.net/). The client was created by Elias Fleckenstein and is inspired by the Minecraft clients Liquid Bounce and Impact. Discord: https://discord.gg/kab99uu for more information.