MacOS platform support.

Engine/source/platformMac/macFont.h

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+//-----------------------------------------------------------------------------
+// Copyright (c) 2013 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#import "platform/platformFont.h"
+#import <CoreText/CoreText.h>
+//-----------------------------------------------------------------------------
+
+class OSXFont : public PlatformFont
+{
+private:
+   
+   // Font reference.
+   CTFontRef       mFontRef;
+   
+   // Distance from drawing point to typographic baseline.
+   // Think of the drawing point as the upper left corner of a text box.
+   // NOTE: 'baseline' is synonymous with 'ascent' in Torque.
+   U32             mBaseline;
+   
+   // Distance between lines.
+   U32             mHeight;
+   
+   // Glyph rendering color-space.
+   CGColorSpaceRef mColorSpace;
+   
+public:
+   OSXFont();
+   virtual ~OSXFont();
+   
+   /// Look up the requested font, cache style, layout, colorspace, and some metrics.
+   virtual bool create( const char* name, dsize_t size, U32 charset = TGE_ANSI_CHARSET);
+   
+   /// Determine if the character requested is a drawable character, or if it should be ignored.
+   virtual bool isValidChar( const UTF16 character) const;
+   virtual bool isValidChar( const UTF8* str) const;
+   
+   /// Get some vertical data on the font at large. Useful for drawing multiline text, and sizing text boxes.
+   virtual U32 getFontHeight() const { return mHeight; }
+   virtual U32 getFontBaseLine() const { return mBaseline; }
+   
+   // Draw the character to a temporary bitmap, and fill the CharInfo with various text metrics.
+   virtual PlatformFont::CharInfo &getCharInfo(const UTF16 character) const;
+   virtual PlatformFont::CharInfo &getCharInfo(const UTF8 *str) const;
+};