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-rw-r--r--src/fontcache.cpp130
1 files changed, 49 insertions, 81 deletions
diff --git a/src/fontcache.cpp b/src/fontcache.cpp
index ed621cfc1..ae5416dd8 100644
--- a/src/fontcache.cpp
+++ b/src/fontcache.cpp
@@ -140,8 +140,11 @@ bool SpriteFontCache::GetDrawGlyphShadow()
/** Font cache for fonts that are based on a freetype font. */
class FreeTypeFontCache : public FontCache {
+private:
+ FT_Face face; ///< The font face associated with this font.
public:
- FreeTypeFontCache(FontSize fs) : FontCache(fs) {}
+ FreeTypeFontCache(FontSize fs, FT_Face face, int pixels);
+ ~FreeTypeFontCache();
virtual SpriteID GetUnicodeGlyph(uint32 key) { return this->parent->GetUnicodeGlyph(key); }
virtual void SetUnicodeGlyph(uint32 key, SpriteID sprite) { this->parent->SetUnicodeGlyph(key, sprite); }
virtual void InitializeUnicodeGlyphMap() { this->parent->InitializeUnicodeGlyphMap(); }
@@ -152,10 +155,6 @@ public:
};
FT_Library _library = NULL;
-static FT_Face _face_small = NULL;
-static FT_Face _face_medium = NULL;
-static FT_Face _face_large = NULL;
-static FT_Face _face_mono = NULL;
static int _ascender[FS_END];
FreeTypeSettings _freetype;
@@ -163,40 +162,46 @@ FreeTypeSettings _freetype;
static const byte FACE_COLOUR = 1;
static const byte SHADOW_COLOUR = 2;
-static void SetFontGeometry(FT_Face face, FontSize size, int pixels)
+/**
+ * Create a new FreeTypeFontCache.
+ * @param fs The font size that is going to be cached.
+ * @param face The font that has to be loaded.
+ * @param pixels The number of pixels this font should be high.
+ */
+FreeTypeFontCache::FreeTypeFontCache(FontSize fs, FT_Face face, int pixels) : FontCache(fs), face(face)
{
if (pixels == 0) {
/* Try to determine a good height based on the minimal height recommended by the font. */
- pixels = _default_font_height[size];
+ pixels = _default_font_height[this->fs];
- TT_Header *head = (TT_Header *)FT_Get_Sfnt_Table(face, ft_sfnt_head);
+ TT_Header *head = (TT_Header *)FT_Get_Sfnt_Table(this->face, ft_sfnt_head);
if (head != NULL) {
/* Font height is minimum height plus the difference between the default
* height for this font size and the small size. */
- int diff = _default_font_height[size] - _default_font_height[FS_SMALL];
- pixels = Clamp(min(head->Lowest_Rec_PPEM, 20) + diff, _default_font_height[size], MAX_FONT_SIZE);
+ int diff = _default_font_height[this->fs] - _default_font_height[FS_SMALL];
+ pixels = Clamp(min(head->Lowest_Rec_PPEM, 20) + diff, _default_font_height[this->fs], MAX_FONT_SIZE);
}
}
- FT_Error err = FT_Set_Pixel_Sizes(face, 0, pixels);
+ FT_Error err = FT_Set_Pixel_Sizes(this->face, 0, pixels);
if (err == FT_Err_Invalid_Pixel_Size) {
/* Find nearest size to that requested */
- FT_Bitmap_Size *bs = face->available_sizes;
- int i = face->num_fixed_sizes;
+ FT_Bitmap_Size *bs = this->face->available_sizes;
+ int i = this->face->num_fixed_sizes;
int n = bs->height;
for (; --i; bs++) {
if (abs(pixels - bs->height) < abs(pixels - n)) n = bs->height;
}
- FT_Set_Pixel_Sizes(face, 0, n);
+ FT_Set_Pixel_Sizes(this->face, 0, n);
}
- int asc = face->size->metrics.ascender >> 6;
- int dec = face->size->metrics.descender >> 6;
+ int asc = this->face->size->metrics.ascender >> 6;
+ int dec = this->face->size->metrics.descender >> 6;
- _ascender[size] = asc;
- _font_height[size] = asc - dec;
+ _ascender[this->fs] = asc;
+ _font_height[this->fs] = asc - dec;
}
/**
@@ -253,15 +258,11 @@ static void LoadFreeTypeFont(const char *font_name, FT_Face *face, const char *t
static void ResetGlyphCache(bool monospace);
/**
- * Unload a face and set it to NULL.
- * @param face the face to unload
+ * Unload the face
*/
-static void UnloadFace(FT_Face *face)
+FreeTypeFontCache::~FreeTypeFontCache()
{
- if (*face == NULL) return;
-
- FT_Done_Face(*face);
- *face = NULL;
+ if (this->face != NULL) FT_Done_Face(this->face);
}
/**
@@ -273,14 +274,6 @@ void InitFreeType(bool monospace)
ResetFontSizes(monospace);
ResetGlyphCache(monospace);
- if (monospace) {
- UnloadFace(&_face_mono);
- } else {
- UnloadFace(&_face_small);
- UnloadFace(&_face_medium);
- UnloadFace(&_face_large);
- }
-
if (StrEmpty(_freetype.small.font) && StrEmpty(_freetype.medium.font) && StrEmpty(_freetype.large.font) && StrEmpty(_freetype.mono.font)) {
DEBUG(freetype, 1, "No font faces specified, using sprite fonts instead");
return;
@@ -297,30 +290,23 @@ void InitFreeType(bool monospace)
/* Load each font */
if (monospace) {
- LoadFreeTypeFont(_freetype.mono.font , &_face_mono, "mono");
+ FT_Face mono = NULL;
+ LoadFreeTypeFont(_freetype.mono.font , &mono, "mono");
- if (_face_mono != NULL) {
- new FreeTypeFontCache(FS_MONO);
- SetFontGeometry(_face_mono, FS_MONO, _freetype.mono.size);
- }
+ if (mono != NULL) new FreeTypeFontCache(FS_MONO, mono, _freetype.mono.size);
} else {
- LoadFreeTypeFont(_freetype.small.font, &_face_small, "small");
- LoadFreeTypeFont(_freetype.medium.font, &_face_medium, "medium");
- LoadFreeTypeFont(_freetype.large.font, &_face_large, "large");
+ FT_Face small = NULL;
+ FT_Face medium = NULL;
+ FT_Face large = NULL;
+
+ LoadFreeTypeFont(_freetype.small.font, &small, "small");
+ LoadFreeTypeFont(_freetype.medium.font, &medium, "medium");
+ LoadFreeTypeFont(_freetype.large.font, &large, "large");
/* Set each font size */
- if (_face_small != NULL) {
- new FreeTypeFontCache(FS_SMALL);
- SetFontGeometry(_face_small, FS_SMALL, _freetype.small.size);
- }
- if (_face_medium != NULL) {
- new FreeTypeFontCache(FS_NORMAL);
- SetFontGeometry(_face_medium, FS_NORMAL, _freetype.medium.size);
- }
- if (_face_large != NULL) {
- new FreeTypeFontCache(FS_LARGE);
- SetFontGeometry(_face_large, FS_LARGE, _freetype.large.size);
- }
+ if (small != NULL) new FreeTypeFontCache(FS_SMALL, small, _freetype.small.size);
+ if (medium != NULL) new FreeTypeFontCache(FS_NORMAL, medium, _freetype.medium.size);
+ if (large != NULL) new FreeTypeFontCache(FS_LARGE, large, _freetype.large.size);
}
}
@@ -329,13 +315,9 @@ void InitFreeType(bool monospace)
*/
void UninitFreeType()
{
- ResetGlyphCache(true);
- ResetGlyphCache(false);
-
- UnloadFace(&_face_small);
- UnloadFace(&_face_medium);
- UnloadFace(&_face_large);
- UnloadFace(&_face_mono);
+ ResetFontSizes(true);
+ ResetFontSizes(false);
+ ClearFontCache();
for (FontSize fs = FS_BEGIN; fs < FS_END; fs++) {
FontCache *fc = FontCache::Get(fs);
@@ -355,18 +337,6 @@ void FreeTypeFontCache::ClearFontCache()
ResetGlyphCache(false);
}
-static FT_Face GetFontFace(FontSize size)
-{
- switch (size) {
- default: NOT_REACHED();
- case FS_NORMAL: return _face_medium;
- case FS_SMALL: return _face_small;
- case FS_LARGE: return _face_large;
- case FS_MONO: return _face_mono;
- }
-}
-
-
struct GlyphEntry {
Sprite *sprite;
byte width;
@@ -464,7 +434,6 @@ static bool GetFontAAState(FontSize size)
const Sprite *FreeTypeFontCache::GetGlyph(WChar key)
{
- FT_Face face = GetFontFace(this->fs);
FT_GlyphSlot slot;
GlyphEntry new_glyph;
GlyphEntry *glyph;
@@ -477,7 +446,7 @@ const Sprite *FreeTypeFontCache::GetGlyph(WChar key)
assert(IsPrintable(key));
/* Bail out if no face loaded, or for our special characters */
- if (face == NULL || (key >= SCC_SPRITE_START && key <= SCC_SPRITE_END)) {
+ if (this->face == NULL || (key >= SCC_SPRITE_START && key <= SCC_SPRITE_END)) {
SpriteID sprite = this->GetUnicodeGlyph(key);
if (sprite == 0) sprite = this->GetUnicodeGlyph('?');
@@ -485,7 +454,7 @@ const Sprite *FreeTypeFontCache::GetGlyph(WChar key)
if (sprite != 0) return GetSprite(sprite, ST_FONT);
/* For the 'rare' case there is no font available at all. */
- if (face == NULL) error("No sprite font and no real font either... bailing!");
+ if (this->face == NULL) error("No sprite font and no real font either... bailing!");
/* Use the '?' from the freetype font. */
key = '?';
@@ -495,11 +464,11 @@ const Sprite *FreeTypeFontCache::GetGlyph(WChar key)
glyph = GetGlyphPtr(this->fs, key);
if (glyph != NULL && glyph->sprite != NULL) return glyph->sprite;
- slot = face->glyph;
+ slot = this->face->glyph;
bool aa = GetFontAAState(this->fs);
- FT_UInt glyph_index = FT_Get_Char_Index(face, key);
+ FT_UInt glyph_index = FT_Get_Char_Index(this->face, key);
if (glyph_index == 0) {
if (key == '?') {
/* The font misses the '?' character. Use sprite font. */
@@ -518,8 +487,8 @@ const Sprite *FreeTypeFontCache::GetGlyph(WChar key)
return glyph->sprite;
}
}
- FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
- FT_Render_Glyph(face->glyph, aa ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO);
+ FT_Load_Glyph(this->face, glyph_index, FT_LOAD_DEFAULT);
+ FT_Render_Glyph(this->face->glyph, aa ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO);
/* Despite requesting a normal glyph, FreeType may have returned a bitmap */
aa = (slot->bitmap.pixel_mode == FT_PIXEL_MODE_GRAY);
@@ -577,10 +546,9 @@ bool FreeTypeFontCache::GetDrawGlyphShadow()
uint FreeTypeFontCache::GetGlyphWidth(WChar key)
{
- FT_Face face = GetFontFace(this->fs);
GlyphEntry *glyph;
- if (face == NULL || (key >= SCC_SPRITE_START && key <= SCC_SPRITE_END)) {
+ if (this->face == NULL || (key >= SCC_SPRITE_START && key <= SCC_SPRITE_END)) {
SpriteID sprite = this->GetUnicodeGlyph(key);
if (sprite == 0) sprite = this->GetUnicodeGlyph('?');
return SpriteExists(sprite) ? GetSprite(sprite, ST_FONT)->width + (this->fs != FS_NORMAL && this->fs != FS_MONO) : 0;
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-07-08 20:29:17 +0000