pixelflinger: GGLSurface 구조체

GGLSurface 도 알아야 한다.  그렇게 특별한 점은 보이지 않는다.

typedef struct {
    GGLsizei    version;    // always set to sizeof(GGLSurface)
    GGLuint     width;      // width in pixels
    GGLuint     height;     // height in pixels
    GGLint      stride;     // stride in pixels
    GGLubyte*   data;       // pointer to the bits
    GGLubyte    format;     // pixel format
    GGLubyte    rfu[3];     // must be zero
    // these values are dependent on the used format
    union {
        GGLint  compressedFormat;
        GGLint  vstride;
    };
    void*       reserved;
} GGLSurface;