25 lines
1.2 KiB
Plaintext
25 lines
1.2 KiB
Plaintext
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The OpenGL Character Renderer (GLC) is a state machine that provides
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OpenGL programs with character rendering services via an application
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programming interface (API).
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The character rendering services provided by GLC has some significant
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advantages over platform specific interface such as GLX or WGL:
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1. The GLC API is platform independent. Since most nontrivial GL
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applications render characters, GLC is an important step toward
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the goal of truly portable GL applications.
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2. The GLC is simpler to use. Only two lines of GLC commands are
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required to prepare for rendering characters.
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3. GLC provides more ways to exploit the rendering power of OpenGL.
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For example, a glyph can be drawn as a bitmap, a set of lines, a
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set of triangles, or a textured rectangle.
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4. GLC provides better support for glyph transformations. For
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example, GLC supports rotated text, which is unavailable in GLX.
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5. GLC provides better support for the large coded character set
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defined by the standards ISO/IEC 10646:2003 and Unicode 4.0.1
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QuesoGLC is an implementation of the GLC. QuesoGLC is based on the
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FreeType library, provides Unicode support and is designed to be
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easily ported to any platform that supports both FreeType and the
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OpenGL API.
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