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Fix #7003: Freetype fonts were scaled by both GUI and Font zoom levels. (#7267)

This commit is contained in:
PeterN 2019-02-23 16:07:25 +00:00 committed by GitHub
parent 13962a8475
commit eeae4512ae
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 26 additions and 8 deletions
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14
src/fontcache.cpp
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@ -184,12 +184,12 @@ uint SpriteFontCache::GetGlyphWidth(GlyphID key)
{
SpriteID sprite = this->GetUnicodeGlyph(key);
if (sprite == 0) sprite = this->GetUnicodeGlyph('?');
return SpriteExists(sprite) ? GetSprite(sprite, ST_FONT)->width + ScaleGUITrad(this->fs != FS_NORMAL ? 1 : 0) : 0;
return SpriteExists(sprite) ? GetSprite(sprite, ST_FONT)->width + ScaleFontTrad(this->fs != FS_NORMAL ? 1 : 0) : 0;
}
int SpriteFontCache::GetHeight() const
{
return this->height * (1 << (ZOOM_LVL_OUT_4X - _font_zoom));
return ScaleFontTrad(this->height);
}
bool SpriteFontCache::GetDrawGlyphShadow()
@ -282,21 +282,19 @@ void FreeTypeFontCache::SetFontSize(FontSize fs, FT_Face face, int pixels)
{
if (pixels == 0) {
/* Try to determine a good height based on the minimal height recommended by the font. */
int scaled_height = ScaleGUITrad(_default_font_height[this->fs]);
int scaled_height = ScaleFontTrad(_default_font_height[this->fs]);
pixels = scaled_height;
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 = scaled_height - ScaleGUITrad(_default_font_height[FS_SMALL]);
int diff = scaled_height - ScaleFontTrad(_default_font_height[FS_SMALL]);
pixels = Clamp(min(head->Lowest_Rec_PPEM, 20) + diff, scaled_height, MAX_FONT_SIZE);
}
} else {
pixels = ScaleFontTrad(pixels);
}
/* Apply user-specified font zoom. */
pixels *= (1 << (ZOOM_LVL_OUT_4X - _font_zoom));
this->used_size = pixels;
FT_Error err = FT_Set_Pixel_Sizes(this->face, 0, pixels);

20
src/zoom_func.h
View File

@ -84,4 +84,24 @@ static inline int ScaleGUITrad(int value)
return UnScaleGUI(value * ZOOM_LVL_BASE);
}
/**
* Short-hand to apply font zoom level.
* @param value Pixel amount at #ZOOM_LVL_BEGIN (full zoom in).
* @return Pixel amount at #ZOOM_LVL_FONT (current interface size).
*/
static inline int UnScaleFont(int value)
{
return UnScaleByZoom(value, ZOOM_LVL_FONT);
}
/**
* Scale traditional pixel dimensions to Font zoom level.
* @param value Pixel amount at #ZOOM_LVL_BASE (traditional "normal" interface size).
* @return Pixel amount at #ZOOM_LVL_FONT (current interface size).
*/
static inline int ScaleFontTrad(int value)
{
return UnScaleFont(value * ZOOM_LVL_BASE);
}
#endif /* ZOOM_FUNC_H */