(svn r15849) -Codechange: provide easy access to the real height of the used fonts

src/fontcache.cpp

@@ -27,6 +27,9 @@ static FT_Face _face_small = NULL;
 static FT_Face _face_medium = NULL;
 static FT_Face _face_large = NULL;
 
+/** Semi-constant for the height of the different sizes of fonts. */
+int _font_height[FS_END];
+
 FreeTypeSettings _freetype;
 
 enum {
@@ -529,6 +532,8 @@ static void LoadFreeTypeFont(const char *font_name, FT_Face *face, const char *t
 
 void InitFreeType()
 {
+	ResetFontSizes();
+
 	if (StrEmpty(_freetype.small_font) && StrEmpty(_freetype.medium_font) && StrEmpty(_freetype.large_font)) {
 		DEBUG(freetype, 1, "No font faces specified, using sprite fonts instead");
 		return;
@@ -547,9 +552,18 @@ void InitFreeType()
 	LoadFreeTypeFont(_freetype.large_font,  &_face_large,  "large");
 
 	/* Set each font size */
-	if (_face_small  != NULL) FT_Set_Pixel_Sizes(_face_small,  0, _freetype.small_size);
-	if (_face_medium != NULL) FT_Set_Pixel_Sizes(_face_medium, 0, _freetype.medium_size);
-	if (_face_large  != NULL) FT_Set_Pixel_Sizes(_face_large,  0, _freetype.large_size);
+	if (_face_small != NULL) {
+		FT_Set_Pixel_Sizes(_face_small, 0, _freetype.small_size);
+		_font_height[FS_SMALL] = _freetype.small_size;
+	}
+	if (_face_medium != NULL) {
+		FT_Set_Pixel_Sizes(_face_medium, 0, _freetype.medium_size);
+		_font_height[FS_NORMAL] = _freetype.medium_size;
+	}
+	if (_face_large != NULL) {
+		FT_Set_Pixel_Sizes(_face_large, 0, _freetype.large_size);
+		_font_height[FS_LARGE] = _freetype.large_size;
+	}
 }
 
 static void ResetGlyphCache();
@@ -571,6 +585,7 @@ static void UnloadFace(FT_Face *face)
  */
 void UninitFreeType()
 {
+	ResetFontSizes();
 	ResetGlyphCache();
 
 	UnloadFace(&_face_small);
@@ -783,6 +798,14 @@ uint GetGlyphWidth(FontSize size, WChar key)
 
 #endif /* WITH_FREETYPE */
 
+/** Reset the font sizes to the defaults of the sprite based fonts. */
+void ResetFontSizes()
+{
+	_font_height[FS_SMALL]  =  6;
+	_font_height[FS_NORMAL] = 10;
+	_font_height[FS_LARGE]  = 18;
+}
+
 /* Sprite based glyph mapping */
 
 #include "table/unicode.h"

src/fontcache.h

@@ -16,6 +16,8 @@ void SetUnicodeGlyph(FontSize size, uint32 key, SpriteID sprite);
 /** Initialize the glyph map */
 void InitializeUnicodeGlyphMap();
 
+void ResetFontSizes();
+
 #ifdef WITH_FREETYPE
 
 struct FreeTypeSettings {
@@ -51,8 +53,8 @@ bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, i
 #else
 
 /* Stub for initializiation */
-static inline void InitFreeType() {}
-static inline void UninitFreeType() {}
+static inline void InitFreeType() { ResetFontSizes(); }
+static inline void UninitFreeType() { ResetFontSizes(); }
 
 /** Get the Sprite for a glyph */
 static inline const Sprite *GetGlyph(FontSize size, uint32 key)

src/gfx.cpp

@@ -816,7 +816,7 @@ static int ReallyDoDrawString(const char *string, int x, int y, TextColour colou
 		 * So if the string cannot be drawn, return the original start to say so.*/
 		if (x >= dpi->left + dpi->width || y >= dpi->top + dpi->height) return x;
 
-		if (colour != TC_INVALID) { // the invalid colour flag test should not  really occur.  But better be safe
+		if (colour != TC_INVALID) { // the invalid colour flag test should not really occur. But better be safe
 switch_colour:;
 			SetColourRemap(colour);
 		}

src/gfx_func.h

@@ -158,14 +158,15 @@ byte GetCharacterWidth(FontSize size, uint32 key);
  */
 static inline byte GetCharacterHeight(FontSize size)
 {
-	switch (size) {
-		default: NOT_REACHED();
-		case FS_NORMAL: return 10;
-		case FS_SMALL:  return 6;
-		case FS_LARGE:  return 18;
-	}
+	assert(size < FS_END);
+	extern int _font_height[FS_END];
+	return _font_height[size];
 }
 
+#define FONT_HEIGHT_SMALL  (GetCharacterHeight(FS_SMALL))
+#define FONT_HEIGHT_NORMAL (GetCharacterHeight(FS_NORMAL))
+#define FONT_HEIGHT_LARGE  (GetCharacterHeight(FS_LARGE))
+
 extern DrawPixelInfo *_cur_dpi;
 
 /**