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Clean up font caching, fix bitmap fonts

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SmallJoker committed Oct 17, 2019
1 parent 72416a6 commit 388ea737f5d37d637556bf40890948bfc36734ce
Showing with 99 additions and 107 deletions.
  1. +50 −67 src/client/fontengine.cpp
  2. +40 −28 src/client/fontengine.h
  3. +9 −8 src/gui/guiHyperText.cpp
  4. +0 −4 src/gui/guiHyperText.h
@@ -41,11 +41,6 @@ static void font_setting_changed(const std::string &name, void *userdata)
g_fontengine->readSettings();
}

unsigned int get_font_cache_index(FontMode mode, bool bold = false, bool italic = false)
{
return (mode << 2) | (bold << 1) | italic;
}

/******************************************************************************/
FontEngine::FontEngine(Settings* main_settings, gui::IGUIEnvironment* env) :
m_settings(main_settings),
@@ -106,45 +101,45 @@ void FontEngine::cleanCache()
}

/******************************************************************************/
irr::gui::IGUIFont *FontEngine::getFont(unsigned int font_size, FontMode mode,
bool bold, bool italic)
irr::gui::IGUIFont *FontEngine::getFont(FontSpec spec)
{
if (mode == FM_Unspecified) {
mode = m_currentMode;
if (spec.mode == FM_Unspecified) {
spec.mode = m_currentMode;
} else if (m_currentMode == FM_Simple) {
// Freetype disabled -> Force simple mode
mode = (mode == FM_Mono || mode == FM_SimpleMono) ?
FM_SimpleMono : FM_Simple;
spec.mode = (spec.mode == FM_Mono ||
spec.mode == FM_SimpleMono) ?
FM_SimpleMono : FM_Simple;
// Support for those could be added, but who cares?
spec.bold = false;
spec.italic = false;
}

// Fallback to default size
if (font_size == FONT_SIZE_UNSPECIFIED)
font_size = m_default_size[mode];

unsigned int cache_index = get_font_cache_index(mode, bold, italic);

const auto &cache = m_font_cache[cache_index];

if (cache.find(font_size) == cache.end()) {
if (mode == FM_Simple || mode == FM_SimpleMono)
initSimpleFont(font_size, mode);
else
initFont(font_size, mode, bold, italic);
}
if (spec.size == FONT_SIZE_UNSPECIFIED)
spec.size = m_default_size[spec.mode];

const auto &cache = m_font_cache[spec.getHash()];
auto it = cache.find(spec.size);
if (it != cache.end())
return it->second;

// Font does not yet exist
gui::IGUIFont *font = nullptr;
if (spec.mode == FM_Simple || spec.mode == FM_SimpleMono)
font = initSimpleFont(spec);
else
font = initFont(spec);

if (m_font_cache[cache_index].find(font_size) ==
m_font_cache[cache_index].end())
initFont(font_size, mode, bold, italic);
m_font_cache[spec.getHash()][spec.size] = font;

const auto &font = cache.find(font_size);
return font != cache.end() ? font->second : nullptr;
return font;
}

/******************************************************************************/
unsigned int FontEngine::getTextHeight(unsigned int font_size, FontMode mode,
bool bold, bool italic)
unsigned int FontEngine::getTextHeight(const FontSpec &spec)
{
irr::gui::IGUIFont *font = getFont(font_size, mode, bold, italic);
irr::gui::IGUIFont *font = getFont(spec);

// use current skin font as fallback
if (font == NULL) {
@@ -156,10 +151,9 @@ unsigned int FontEngine::getTextHeight(unsigned int font_size, FontMode mode,
}

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

// use current skin font as fallback
if (font == NULL) {
@@ -172,10 +166,9 @@ unsigned int FontEngine::getTextWidth(const std::wstring& text,


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

// use current skin font as fallback
if (font == NULL) {
@@ -250,21 +243,14 @@ void FontEngine::updateFontCache()
}

/******************************************************************************/
void FontEngine::initFont(unsigned int basesize, FontMode mode,
bool bold, bool italic)
gui::IGUIFont *FontEngine::initFont(const FontSpec &spec)
{
assert(mode != FM_Unspecified);
assert(basesize != FONT_SIZE_UNSPECIFIED);

int cache_index = get_font_cache_index(mode, bold, italic);

if (m_font_cache[cache_index].find(basesize) !=
m_font_cache[cache_index].end())
return;
assert(spec.mode != FM_Unspecified);
assert(spec.size != FONT_SIZE_UNSPECIFIED);

std::string setting_prefix = "";

switch (mode) {
switch (spec.mode) {
case FM_Fallback:
setting_prefix = "fallback_";
break;
@@ -276,12 +262,14 @@ void FontEngine::initFont(unsigned int basesize, FontMode mode,
break;
}

std::string setting_suffix = (bold) ?
((italic) ? "_bold_italic" : "_bold") :
((italic) ? "_italic" : "");
std::string setting_suffix = "";
if (spec.bold)
setting_suffix.append("_bold");
if (spec.italic)
setting_suffix.append("_italic");

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

if (size == 0) {
errorstream << "FontEngine: attempt to use font size 0" << std::endl;
@@ -310,10 +298,8 @@ void FontEngine::initFont(unsigned int basesize, FontMode mode,
font_path.c_str(), size, true, true, font_shadow,
font_shadow_alpha);

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

errorstream << "FontEngine: Cannot load '" << font_path <<
"'. Trying to fall back to another path." << std::endl;
@@ -332,12 +318,13 @@ void FontEngine::initFont(unsigned int basesize, FontMode mode,
}

/** initialize a font without freetype */
void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
gui::IGUIFont *FontEngine::initSimpleFont(const FontSpec &spec)
{
assert(mode == FM_Simple || mode == FM_SimpleMono);
assert(spec.mode == FM_Simple || spec.mode == FM_SimpleMono);
assert(spec.size != FONT_SIZE_UNSPECIFIED);

const std::string &font_path = m_settings->get(
(mode == FM_SimpleMono) ? "mono_font_path" : "font_path");
(spec.mode == FM_SimpleMono) ? "mono_font_path" : "font_path");

size_t pos_dot = font_path.find_last_of('.');
std::string basename = font_path;
@@ -346,19 +333,16 @@ void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
if (ending == ".ttf") {
errorstream << "FontEngine: Found font \"" << font_path
<< "\" but freetype is not available." << std::endl;
return;
return nullptr;
}

if (ending == ".xml" || ending == ".png")
basename = font_path.substr(0, pos_dot);

if (basesize == FONT_SIZE_UNSPECIFIED)
basesize = DEFAULT_FONT_SIZE;

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

irr::gui::IGUIFont *font = nullptr;
std::string font_extensions[] = { ".png", ".xml" };
@@ -400,6 +384,5 @@ void FontEngine::initSimpleFont(unsigned int basesize, FontMode mode)
}
}

if (font)
m_font_cache[get_font_cache_index(mode)][basesize] = font;
return font;
}
@@ -29,7 +29,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,

#define FONT_SIZE_UNSPECIFIED 0xFFFFFFFF

enum FontMode {
enum FontMode : u8 {
FM_Standard = 0,
FM_Mono,
FM_Fallback,
@@ -39,6 +39,24 @@ enum FontMode {
FM_Unspecified
};

struct FontSpec {
FontSpec(unsigned int font_size, FontMode mode, bool bold, bool italic) :
size(font_size),
mode(mode),
bold(bold),
italic(italic) {}

u16 getHash()
{
return (mode << 2) | (bold << 1) | italic;
}

unsigned int size;
FontMode mode;
bool bold;
bool italic;
};

class FontEngine
{
public:
@@ -47,62 +65,60 @@ class FontEngine

~FontEngine();

/** get Font */
irr::gui::IGUIFont *getFont(unsigned int font_size, FontMode mode,
bool bold, bool italic);
// Get best possible font specified by FontSpec
irr::gui::IGUIFont *getFont(FontSpec spec);

irr::gui::IGUIFont *getFont(unsigned int font_size=FONT_SIZE_UNSPECIFIED,
FontMode mode=FM_Unspecified)
{
return getFont(font_size, mode, m_default_bold, m_default_italic);
FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
return getFont(spec);
}

/** get text height for a specific font */
unsigned int getTextHeight(unsigned int font_size, FontMode mode,
bool bold, bool italic);
unsigned int getTextHeight(const FontSpec &spec);

/** get text width if a text for a specific font */
unsigned int getTextHeight(
unsigned int font_size=FONT_SIZE_UNSPECIFIED,
FontMode mode=FM_Unspecified)
{
return getTextHeight(font_size, mode, m_default_bold, m_default_italic);
FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
return getTextHeight(spec);
}

unsigned int getTextWidth(const std::wstring& text,
unsigned int font_size, FontMode mode, bool bold, bool italic);
unsigned int getTextWidth(const std::wstring &text, const FontSpec &spec);

/** get text width if a text for a specific font */
unsigned int getTextWidth(const std::wstring& text,
unsigned int font_size=FONT_SIZE_UNSPECIFIED,
FontMode mode=FM_Unspecified)
{
return getTextWidth(text, font_size, mode, m_default_bold,
m_default_italic);
FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
return getTextWidth(text, spec);
}

unsigned int getTextWidth(const std::string& text,
unsigned int font_size, FontMode mode, bool bold, bool italic)
unsigned int getTextWidth(const std::string &text, const FontSpec &spec)
{
return getTextWidth(utf8_to_wide(text), font_size, mode, bold, italic);
return getTextWidth(utf8_to_wide(text), spec);
}

unsigned int getTextWidth(const std::string& text,
unsigned int font_size=FONT_SIZE_UNSPECIFIED,
FontMode mode=FM_Unspecified)
{
return getTextWidth(utf8_to_wide(text), font_size, mode, m_default_bold,
m_default_italic);
FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
return getTextWidth(utf8_to_wide(text), spec);
}

/** get line height for a specific font (including empty room between lines) */
unsigned int getLineHeight(unsigned int font_size, FontMode mode, bool bold,
bool italic);
unsigned int getLineHeight(const FontSpec &spec);

unsigned int getLineHeight(unsigned int font_size=FONT_SIZE_UNSPECIFIED,
FontMode mode=FM_Unspecified)
{
return getLineHeight(font_size, mode, m_default_bold, m_default_italic);
FontSpec spec(font_size, mode, m_default_bold, m_default_italic);
return getLineHeight(spec);
}

/** get default font size */
@@ -119,14 +135,10 @@ class FontEngine
void updateFontCache();

/** initialize a new font */
void initFont(
unsigned int basesize,
FontMode mode,
bool bold,
bool italic);
gui::IGUIFont *initFont(const FontSpec &spec);

/** initialize a font without freetype */
void initSimpleFont(unsigned int basesize, FontMode mode);
gui::IGUIFont *initSimpleFont(const FontSpec &spec);

/** update current minetest skin with font changes */
void updateSkin();
@@ -147,8 +159,8 @@ class FontEngine
unsigned int m_default_size[FM_MaxMode];

/** default bold and italic */
bool m_default_bold;
bool m_default_italic;
bool m_default_bold = false;
bool m_default_italic = false;

/** current font engine mode */
FontMode m_currentMode = FM_Standard;
@@ -71,14 +71,12 @@ void ParsedText::Element::setStyle(StyleList &style)
if (style["fontstyle"] == "mono")
font_mode = FM_Mono;

FontSpec spec(font_size, font_mode,
is_yes(style["bold"]), is_yes(style["italic"]));

// TODO: find a way to check font validity
// Build a new fontengine ?
this->font =
#if USE_FREETYPE
(gui::CGUITTFont *)
#endif
g_fontengine->getFont(font_size, font_mode,
is_yes(style["bold"]), is_yes(style["italic"]));
this->font = g_fontengine->getFont(spec);

if (!this->font)
printf("No font found ! Size=%d, mode=%d, bold=%s, italic=%s\n",
@@ -606,7 +604,10 @@ TextDrawer::TextDrawer(const wchar_t *text, Client *client,
e.dim.Width = e.font->getDimension(e.text.c_str()).Width;
e.dim.Height = e.font->getDimension(L"Yy").Height;
#if USE_FREETYPE
e.baseline = e.dim.Height - 1 - e.font->getAscender()/64;
if (e.font->getType() == irr::gui::EGFT_CUSTOM) {
e.baseline = e.dim.Height - 1 -
((irr::gui::CGUITTFont *)e.font)->getAscender() / 64;
}
#endif
} else {
e.dim = {0, 0};
@@ -666,7 +667,7 @@ ParsedText::Element *TextDrawer::getElementAt(core::position2d<s32> pos)
It may be called each time width changes and resulting height can be
retrieved using getHeight. See GUIHyperText constructor, it uses it once to
test if text fits in window and eventually another time if width is reduced
m_floatingbecause of scrollbar added.
m_floating because of scrollbar added.
*/
void TextDrawer::place(const core::rect<s32> &dest_rect)
{

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