Change: Vertically centre sprite font relative to TrueType font.

src/fontcache.h

@@ -29,12 +29,12 @@ protected:
 	int descender;                    ///< The descender value of the font.
 	int units_per_em;                 ///< The units per EM value of the font.
 
-	static int GetDefaultFontHeight(FontSize fs);
-
 public:
 	FontCache(FontSize fs);
 	virtual ~FontCache();
 
+	static int GetDefaultFontHeight(FontSize fs);
+
 	/**
 	 * Get the FontSize of the font.
 	 * @return The FontSize.

src/gfx_layout.cpp

@@ -11,6 +11,7 @@
 #include "gfx_layout.h"
 #include "string_func.h"
 #include "strings_func.h"
+#include "zoom_func.h"
 #include "debug.h"
 
 #include "table/control_codes.h"
@@ -345,11 +346,11 @@ FallbackParagraphLayout::FallbackVisualRun::FallbackVisualRun(Font *font, const
 	for (int i = 0; i < this->glyph_count; i++) {
 		this->glyphs[i] = font->fc->MapCharToGlyph(chars[i]);
 		if (isbuiltin) {
-			this->positions[2 * i + 1] = font->fc->GetAscender();                                                   // Apply sprite font's ascender.
+			this->positions[2 * i + 1] = font->fc->GetAscender(); // Apply sprite font's ascender.
 		} else if (chars[i] >= SCC_SPRITE_START && chars[i] <= SCC_SPRITE_END) {
-			this->positions[2 * i + 1] = font->fc->GetAscender() - font->fc->GetGlyph(this->glyphs[i])->height - 1; // Align sprite glyphs to font baseline.
+			this->positions[2 * i + 1] = (font->fc->GetHeight() - ScaleSpriteTrad(FontCache::GetDefaultFontHeight(font->fc->GetSize()))) / 2; // Align sprite font to centre
 		} else {
-			this->positions[2 * i + 1] = 0;                                                                         // No ascender adjustment.
+			this->positions[2 * i + 1] = 0;                       // No ascender adjustment.
 		}
 		this->positions[2 * i + 2] = this->positions[2 * i] + font->fc->GetGlyphWidth(this->glyphs[i]);
 		this->glyph_to_char[i] = i;

src/os/macosx/string_osx.cpp

@@ -13,6 +13,7 @@
 #include "../../strings_func.h"
 #include "../../table/control_codes.h"
 #include "../../fontcache.h"
+#include "../../zoom_func.h"
 #include "macos.h"
 
 #include <CoreFoundation/CoreFoundation.h>
@@ -245,7 +246,7 @@ CoreTextParagraphLayout::CoreTextVisualRun::CoreTextVisualRun(CTRunRef run, Font
 		if (buff[this->glyph_to_char[i]] >= SCC_SPRITE_START && buff[this->glyph_to_char[i]] <= SCC_SPRITE_END) {
 			this->glyphs[i] = font->fc->MapCharToGlyph(buff[this->glyph_to_char[i]]);
 			this->positions[i * 2 + 0] = pts[i].x;
-			this->positions[i * 2 + 1] = font->fc->GetAscender() - font->fc->GetGlyph(this->glyphs[i])->height - 1; // Align sprite glyphs to font baseline.
+			this->positions[i * 2 + 1] = (font->fc->GetHeight() - ScaleSpriteTrad(FontCache::GetDefaultFontHeight(font->fc->GetSize()))) / 2; // Align sprite font to centre
 		} else {
 			this->glyphs[i] = gl[i];
 			this->positions[i * 2 + 0] = pts[i].x;

src/os/windows/string_uniscribe.cpp

@@ -14,6 +14,7 @@
 #include "../../strings_func.h"
 #include "../../string_func.h"
 #include "../../table/control_codes.h"
+#include "../../zoom_func.h"
 #include "win32.h"
 #include <vector>
 
@@ -195,7 +196,7 @@ static bool UniscribeShapeRun(const UniscribeParagraphLayoutFactory::CharType *b
 					if (buff[range.pos + i] >= SCC_SPRITE_START && buff[range.pos + i] <= SCC_SPRITE_END) {
 						auto pos = range.char_to_glyph[i];
 						range.ft_glyphs[pos] = range.font->fc->MapCharToGlyph(buff[range.pos + i]);
-						range.offsets[pos].dv = range.font->fc->GetAscender() - range.font->fc->GetGlyph(range.ft_glyphs[pos])->height - 1; // Align sprite glyphs to font baseline.
+						range.offsets[pos].dv = (range.font->fc->GetHeight() - ScaleSpriteTrad(FontCache::GetDefaultFontHeight(range.font->fc->GetSize()))) / 2; // Align sprite font to centre
 						range.advances[pos] = range.font->fc->GetGlyphWidth(range.ft_glyphs[pos]);
 					}
 				}