index : minetest.git	gpcf lifo-fixes release
	modified minetest for gpcfs purposes	gpcf

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path: root/src/filecache.h

	Commit message (Collapse)	Author	Age
*	C++ modernize: Pragma once (#6264)	Loïc Blot	2017-08-17
| | | |	* Migrate cpp headers to pragma once
*	Fix various variables passed by copy instead of const ref (#5610)	Loïc Blot	2017-04-19
| | |	Pointed by cppcheck
*	Clang-format: trivial fix on some headers (#5495)	Loïc Blot	2017-04-01
| | |	Fix some headers style and remove them from whitelist
*	Rewrite client media download and support hash-based remote download	Kahrl	2013-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |	Move most of the media-related code in client.cpp into a new class ClientMediaDownloader (clientmedia.cpp, clientmedia.h). Among other things, this class does the following things: - Download [remote_server][sha1] instead of [remote_server][name]. This is to support servers that provide the same file name with different contents. - Initially fetch [remote_server]index.mth. This file should follow the Minetest Hashset format (currently version 1) and contain a list of SHA1 hashes that exist on the server. - The list of needed SHA1s is uploaded (via HTTP POST) when index.mth is requested, so servers can optionally narrow down the list to the needs of the client. - If index.mth is missing (HTTP response code 404), we enter compat mode, fetching [remote_server][name] as before this commit. - remote_server can now contain multiple servers, separated by commas. The downloader code attempts to split requests between the different servers, as permitted by each server's index.mth. If one server claims to have a file but actually doesn't (or something fails), we ask a different server that also claims to have it. - As before, when none of the remote servers provide a particular file, we download it via the conventional method, i.e. using the minetest protocol: TOSERVER_REQUEST_MEDIA / TOCLIENT_MEDIA. - Bugfix: Every downloaded file's SHA1 is now verified against the SHA1 announced by the minetest server (before loading it and inserting it into the file cache). - Bugfix: Only send TOSERVER_RECEIVED_MEDIA when we actually have all media. This should fix #863.
*	Update Copyright Years	Sfan5	2013-02-24
|
*	Change Minetest-c55 to Minetest	PilzAdam	2013-02-24
|
*	Switch the license to be LGPLv2/later, with small parts still remaining as ↵	Perttu Ahola	2012-06-05
| | | |	GPLv2/later, by agreement of major contributors
*	Almost support loading sounds from server	Perttu Ahola	2012-03-25
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*	Texture cache -> Media cache WIP	Perttu Ahola	2012-03-25
|
*	Cache textures by checksum	Jonathan Neuschäfer	2012-03-25

generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 06:51:32 +0000

/*
Minetest
Copyright (C) 2010-2014 sapier <sapier at gmx dot net>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

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 <cmath>
#include "client/renderingengine.h"
#include "config.h"
#include "porting.h"
#include "filesys.h"

#if USE_FREETYPE
#include "gettext.h"
#include "irrlicht_changes/CGUITTFont.h"
#endif

/** maximum size distance for getting a "similar" font size */
#define MAX_FONT_SIZE_OFFSET 10

/** reference to access font engine, has to be initialized by main */
FontEngine* g_fontengine = NULL;

/** callback to be used on change of font size setting */
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)
{

	for (u32 &i : m_default_size) {
		i = (FontMode) FONT_SIZE_UNSPECIFIED;
	}

	assert(m_settings != NULL); // pre-condition
	assert(m_env != NULL); // pre-condition
	assert(m_env->getSkin() != NULL); // pre-condition

	m_currentMode = FM_Simple;

#if USE_FREETYPE
	if (g_settings->getBool("freetype")) {
		m_default_size[FM_Standard] = m_settings->getU16("font_size");
		m_default_size[FM_Fallback] = m_settings->getU16("fallback_font_size");
		m_default_size[FM_Mono]     = m_settings->getU16("mono_font_size");

		if (is_yes(gettext("needs_fallback_font"))) {
			m_currentMode = FM_Fallback;
		}
		else {
			m_currentMode = FM_Standard;
		}
	}

	// having freetype but not using it is quite a strange case so we need to do
	// special handling for it
	if (m_currentMode == FM_Simple) {
		std::stringstream fontsize;
		fontsize << DEFAULT_FONT_SIZE;
		m_settings->setDefault("font_size", fontsize.str());
		m_settings->setDefault("mono_font_size", fontsize.str());
	}
#endif

	m_default_size[FM_Simple]       = m_settings->getU16("font_size");
	m_default_size[FM_SimpleMono]   = m_settings->getU16("mono_font_size");

	updateSkin();

	if (m_currentMode == FM_Standard) {
		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, 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, 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);
}

/******************************************************************************/
FontEngine::~FontEngine()
{
	cleanCache();
}

/******************************************************************************/
void FontEngine::cleanCache()
{
	for (auto &font_cache_it : m_font_cache) {

		for (auto &font_it : font_cache_it) {
			font_it.second->drop();
			font_it.second = NULL;
		}
		font_cache_it.clear();
	}
}

/******************************************************************************/
irr::gui::IGUIFont* FontEngine::getFont(unsigned int font_size, FontMode mode)
{
	if (mode == FM_Unspecified) {
		mode = m_currentMode;
	}
	else if ((mode == FM_Mono) && (m_currentMode == FM_Simple)) {
		mode = FM_SimpleMono;
	}

	if (font_size == FONT_SIZE_UNSPECIFIED) {
		font_size = m_default_size[mode];
	}

	if ((font_size == m_lastSize) && (mode == m_lastMode)) {
		return m_lastFont;
	}

	if (m_font_cache[mode].find(font_size) == m_font_cache[mode].end()) {
		initFont(font_size, mode);
	}

	if (m_font_cache[mode].find(font_size) == m_font_cache[mode].end()) {
		return NULL;
	}

	m_lastSize = font_size;
	m_lastMode = mode;
	m_lastFont = m_font_cache[mode][font_size];

	return m_font_cache[mode][font_size];
}

/******************************************************************************/
unsigned int FontEngine::getTextHeight(unsigned int font_size, FontMode mode)
{
	irr::gui::IGUIFont* font = getFont(font_size, mode);

	// use current skin font as fallback
	if (font == NULL) {
		font = m_env->getSkin()->getFont();
	}
	FATAL_ERROR_IF(font == NULL, "Could not get skin font");

	return font->getDimension(L"Some unimportant example String").Height;
}

/******************************************************************************/
unsigned int FontEngine::getTextWidth(const std::wstring& text,
		unsigned int font_size, FontMode mode)
{
	irr::gui::IGUIFont* font = getFont(font_size, mode);

	// use current skin font as fallback
	if (font == NULL) {
		font = m_env->getSkin()->getFont();
	}
	FATAL_ERROR_IF(font == NULL, "Could not get font");

	return font->getDimension(text.c_str()).Width;
}


/** get line height for a specific font (including empty room between lines) */
unsigned int FontEngine::getLineHeight(unsigned int font_size, FontMode mode)
{
	irr::gui::IGUIFont* font = getFont(font_size, mode);

	// use current skin font as fallback
	if (font == NULL) {
		font = m_env->getSkin()->getFont();
	}
	FATAL_ERROR_IF(font == NULL, "Could not get font");

	return font->getDimension(L"Some unimportant example String").Height
			+ font->getKerningHeight();
}

/******************************************************************************/
unsigned int FontEngine::getDefaultFontSize()
{
	return m_default_size[m_currentMode];
}

/******************************************************************************/
void FontEngine::readSettings()
{
#if USE_FREETYPE
	if (g_settings->getBool("freetype")) {
		m_default_size[FM_Standard] = m_settings->getU16("font_size");
		m_default_size[FM_Fallback] = m_settings->getU16("fallback_font_size");
		m_default_size[FM_Mono]     = m_settings->getU16("mono_font_size");

		if (is_yes(gettext("needs_fallback_font"))) {
			m_currentMode = FM_Fallback;
		}
		else {
			m_currentMode = FM_Standard;
		}
	}
#endif
	m_default_size[FM_Simple]       = m_settings->getU16("font_size");
	m_default_size[FM_SimpleMono]   = m_settings->getU16("mono_font_size");

	cleanCache();
	updateFontCache();
	updateSkin();
}

/******************************************************************************/
void FontEngine::updateSkin()
{
	gui::IGUIFont *font = getFont();

	if (font)
		m_env->getSkin()->setFont(font);
	else
		errorstream << "FontEngine: Default font file: " <<
				"\n\t\"" << m_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 << "text_height=" << text_height << std::endl;
}

/******************************************************************************/
void FontEngine::updateFontCache()
{
	/* the only font to be initialized is default one,
	 * all others are re-initialized on demand */
	initFont(m_default_size[m_currentMode], m_currentMode);

	/* reset font quick access */
	m_lastMode = FM_Unspecified;
	m_lastSize = 0;
	m_lastFont = NULL;
}

/******************************************************************************/
void FontEngine::initFont(unsigned int basesize, FontMode mode)
{

	std::string font_config_prefix;

	if (mode == FM_Unspecified) {
		mode = m_currentMode;
	}

	switch (mode) {

		case FM_Standard:
			font_config_prefix = "";
			break;

		case FM_Fallback:
			font_config_prefix = "fallback_";
			break;

		case FM_Mono:
			font_config_prefix = "mono_";
			if (m_currentMode == FM_Simple)
				mode = FM_SimpleMono;
			break;

		case FM_Simple: /* Fallthrough */
		case FM_SimpleMono: /* Fallthrough */
		default:
			font_config_prefix = "";

	}

	if (m_font_cache[mode].find(basesize) != m_font_cache[mode].end())
		return;

	if ((mode == FM_Simple) || (mode == FM_SimpleMono)) {
		initSimpleFont(basesize, mode);
		return;
	}
#if USE_FREETYPE
	else {
		if (!is_yes(m_settings->get("freetype"))) {
			return;
		}
		u32 size = std::floor(RenderingEngine::getDisplayDensity() *
				m_settings->getFloat("gui_scaling") * basesize);
		if (size == 0) {
			errorstream << "FontEngine: attempt to use font size 0" << std::endl;
			errorstream << "  display density: " << RenderingEngine::getDisplayDensity() << std::endl;
			abort();
		}
		u32 font_shadow       = 0;
		u32 font_shadow_alpha = 0;

		try {
			font_shadow =
					g_settings->getU16(font_config_prefix + "font_shadow");
		} catch (SettingNotFoundException&) {}
		try {
			font_shadow_alpha =
					g_settings->getU16(font_config_prefix + "font_shadow_alpha");
		} catch (SettingNotFoundException&) {}

		std::string font_path = g_settings->get(font_config_prefix + "font_path");

		irr::gui::IGUIFont* font = gui::CGUITTFont::createTTFont(m_env,
				font_path.c_str(), size, true, true, font_shadow,
				font_shadow_alpha);

		if (font) {
			m_font_cache[mode][basesize] = font;
			return;
		}

		if (font_config_prefix == "mono_") {
			const std::string &mono_font_path = m_settings->getDefault("mono_font_path");

			if (font_path != mono_font_path) {
				// try original mono font
				errorstream << "FontEngine: failed to load custom mono "
						"font: " << font_path << ", trying to fall back to "
						"original mono font" << std::endl;

				font = gui::CGUITTFont::createTTFont(m_env,
					mono_font_path.c_str(), size, true, true,
					font_shadow, font_shadow_alpha);

				if (font) {
					m_font_cache[mode][basesize] = font;
					return;
				}
			}
		} else {
			// 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) {
				m_font_cache[mode][basesize] = font;
				return;
			}

			const std::string &fallback_font_path = m_settings->getDefault("fallback_font_path");

			if (font_path != fallback_font_path) {
				// try original fallback font
				errorstream << "FontEngine: failed to load custom fallback "
						"font: " << font_path << ", trying to fall back to "
						"original fallback font" << std::endl;

				font = gui::CGUITTFont::createTTFont(m_env,
					fallback_font_path.c_str(), size, true, true,
					font_shadow, font_shadow_alpha);

				if (font) {
					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
}

/** initialize a font without freetype */
void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
{
	assert(mode == FM_Simple || mode == FM_SimpleMono); // pre-condition

	std::string font_path;
	if (mode == FM_Simple) {
		font_path = m_settings->get("font_path");
	} else {
		font_path = m_settings->get("mono_font_path");
	}
	std::string basename = font_path;
	std::string ending = font_path.substr(font_path.length() -4);

	if (ending == ".ttf") {
		errorstream << "FontEngine: Not trying to open \"" << font_path
				<< "\" which seems to be a truetype font." << std::endl;
		return;
	}

	if ((ending == ".xml") || (ending == ".png")) {
		basename = font_path.substr(0,font_path.length()-4);
	}

	if (basesize == FONT_SIZE_UNSPECIFIED)
		basesize = DEFAULT_FONT_SIZE;

	u32 size = std::floor(
			RenderingEngine::getDisplayDensity() *
			m_settings->getFloat("gui_scaling") *
			basesize);

	irr::gui::IGUIFont* font = NULL;

	for(unsigned int offset = 0; offset < MAX_FONT_SIZE_OFFSET; offset++) {

		// try opening positive offset
		std::stringstream fontsize_plus_png;
		fontsize_plus_png << basename << "_" << (size + offset) << ".png";

		if (fs::PathExists(fontsize_plus_png.str())) {
			font = m_env->getFont(fontsize_plus_png.str().c_str());

			if (font) {
				verbosestream << "FontEngine: found font: " << fontsize_plus_png.str() << std::endl;
				break;
			}
		}

		std::stringstream fontsize_plus_xml;
		fontsize_plus_xml << basename << "_" << (size + offset) << ".xml";

		if (fs::PathExists(fontsize_plus_xml.str())) {
			font = m_env->getFont(fontsize_plus_xml.str().c_str());

			if (font) {
				verbosestream << "FontEngine: found font: " << fontsize_plus_xml.str() << std::endl;
				break;
			}
		}

		// try negative offset
		std::stringstream fontsize_minus_png;
		fontsize_minus_png << basename << "_" << (size - offset) << ".png";

		if (fs::PathExists(fontsize_minus_png.str())) {
			font = m_env->getFont(fontsize_minus_png.str().c_str());

			if (font) {
				verbosestream << "FontEngine: found font: " << fontsize_minus_png.str() << std::endl;
				break;
			}
		}

		std::stringstream fontsize_minus_xml;
		fontsize_minus_xml << basename << "_" << (size - offset) << ".xml";

		if (fs::PathExists(fontsize_minus_xml.str())) {
			font = m_env->getFont(fontsize_minus_xml.str().c_str());

			if (font) {
				verbosestream << "FontEngine: found font: " << fontsize_minus_xml.str() << std::endl;
				break;
			}
		}
	}

	// try name direct
	if (font == NULL) {
		if (fs::PathExists(font_path)) {
			font = m_env->getFont(font_path.c_str());
			if (font)
				verbosestream << "FontEngine: found font: " << font_path << std::endl;
		}
	}

	if (font) {
		font->grab();
		m_font_cache[mode][basesize] = font;
	}
}