mtypes.h

winNT技术操作系统,国外开放的原代码和LIUX一样

 * Indexes for cube map faces.
 */
/*@{*/
#define FACE_POS_X   0
#define FACE_NEG_X   1
#define FACE_POS_Y   2
#define FACE_NEG_Y   3
#define FACE_POS_Z   4
#define FACE_NEG_Z   5
#define MAX_FACES  6
/*@}*/


/**
 * Texture object state.  Contains the array of mipmap images, border color,
 * wrap modes, filter modes, shadow/texcompare state, and the per-texture
 * color palette.
 */
struct gl_texture_object
{
   _glthread_Mutex Mutex;	/**< for thread safety */
   GLint RefCount;		/**< reference count */
   GLuint Name;			/**< the user-visible texture object ID */
   GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
   GLfloat Priority;		/**< in [0,1] */
   GLfloat BorderColor[4];	/**< unclamped */
   GLchan _BorderChan[4];	/**< clamped, as GLchan */
   GLenum WrapS;		/**< S-axis texture image wrap mode */
   GLenum WrapT;		/**< T-axis texture image wrap mode */
   GLenum WrapR;		/**< R-axis texture image wrap mode */
   GLenum MinFilter;		/**< minification filter */
   GLenum MagFilter;		/**< magnification filter */
   GLfloat MinLod;		/**< min lambda, OpenGL 1.2 */
   GLfloat MaxLod;		/**< max lambda, OpenGL 1.2 */
   GLfloat LodBias;		/**< OpenGL 1.4 */
   GLint BaseLevel;		/**< min mipmap level, OpenGL 1.2 */
   GLint MaxLevel;		/**< max mipmap level, OpenGL 1.2 */
   GLfloat MaxAnisotropy;	/**< GL_EXT_texture_filter_anisotropic */
   GLboolean CompareFlag;	/**< GL_SGIX_shadow */
   GLenum CompareOperator;	/**< GL_SGIX_shadow */
   GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
   GLenum CompareMode;		/**< GL_ARB_shadow */
   GLenum CompareFunc;		/**< GL_ARB_shadow */
   GLenum DepthMode;		/**< GL_ARB_depth_texture */
   GLint _MaxLevel;		/**< actual max mipmap level (q in the spec) */
   GLfloat _MaxLambda;		/**< = _MaxLevel - BaseLevel (q - b in spec) */
   GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
   GLboolean _IsPowerOfTwo;	/**< Are all image dimensions powers of two? */
   GLboolean Complete;		/**< Is texture object complete? */

   /** Actual texture images, indexed by [cube face] and [mipmap level] */
   struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];

   /** GL_EXT_paletted_texture */
   struct gl_color_table Palette;


   /**
    * \name For device driver.
    * Note: instead of attaching driver data to this pointer, it's preferable
    * to instead use this struct as a base class for your own texture object
    * class.  Driver->NewTextureObject() can be used to implement the
    * allocation.
    */
   void *DriverData;	/**< Arbitrary device driver data */
};


/**
 * Texture combine environment state.
 * 
 * \todo
 * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
 * structure will need to be expanded for 4 elements.
 */
struct gl_tex_env_combine_state
{
   GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
   GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
   GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
   GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
   GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
   GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
   GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
   GLuint ScaleShiftA;   /**< 0, 1 or 2 */
   GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
   GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
};


/**
 * Texture unit state.  Contains enable flags, texture environment/function/
 * combiners, texgen state, pointers to current texture objects and
 * post-filter color tables.
 */
struct gl_texture_unit
{
   GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
   GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */

   GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
   GLfloat EnvColor[4];
   GLuint TexGenEnabled;	/**< Bitwise-OR of [STRQ]_BIT values */
   /** \name Tex coord generation mode
    * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
   /*@{*/
   GLenum GenModeS;		
   GLenum GenModeT;
   GLenum GenModeR;
   GLenum GenModeQ;
   /*@}*/
   GLuint _GenBitS;
   GLuint _GenBitT;
   GLuint _GenBitR;
   GLuint _GenBitQ;
   GLuint _GenFlags;		/**< bitwise or of GenBit[STRQ] */
   GLfloat ObjectPlaneS[4];
   GLfloat ObjectPlaneT[4];
   GLfloat ObjectPlaneR[4];
   GLfloat ObjectPlaneQ[4];
   GLfloat EyePlaneS[4];
   GLfloat EyePlaneT[4];
   GLfloat EyePlaneR[4];
   GLfloat EyePlaneQ[4];
   GLfloat LodBias;		/**< for biasing mipmap levels */

   /** 
    * \name GL_EXT_texture_env_combine 
    */
   struct gl_tex_env_combine_state Combine;

   /**
    * Derived state based on \c EnvMode and the \c BaseFormat of the
    * currently enabled texture.
    */
   struct gl_tex_env_combine_state _EnvMode;

   /**
    * Currently enabled combiner state.  This will point to either
    * \c Combine or \c _EnvMode.
    */
   struct gl_tex_env_combine_state *_CurrentCombine;

   struct gl_texture_object *Current1D;
   struct gl_texture_object *Current2D;
   struct gl_texture_object *Current3D;
   struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
   struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */

   struct gl_texture_object *_Current; /**< Points to really enabled tex obj */

   struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
   struct gl_texture_object Saved2D;
   struct gl_texture_object Saved3D;
   struct gl_texture_object SavedCubeMap;
   struct gl_texture_object SavedRect;

   /* GL_SGI_texture_color_table */
   struct gl_color_table ColorTable;
   struct gl_color_table ProxyColorTable;
   GLboolean ColorTableEnabled;
};

struct texenvprog_cache {
   GLuint hash;
   void *key;
   void *data;
   struct texenvprog_cache *next;
};

/**
 * Texture attribute group (GL_TEXTURE_BIT).
 */
struct gl_texture_attrib
{
   /**
    * name multitexture 
    */
   /**@{*/
   GLuint CurrentUnit;	        /**< Active texture unit */
   GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
   GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
   GLuint _GenFlags;            /**< for texgen */
   GLuint _TexGenEnabled;
   GLuint _TexMatEnabled;
   /**@}*/

   struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];

   struct gl_texture_object *Proxy1D;
   struct gl_texture_object *Proxy2D;
   struct gl_texture_object *Proxy3D;
   struct gl_texture_object *ProxyCubeMap;
   struct gl_texture_object *ProxyRect;

   /** GL_EXT_shared_texture_palette */
   GLboolean SharedPalette;
   struct gl_color_table Palette;
   
   /** Cached texenv fragment programs */
   struct texenvprog_cache *env_fp_cache;
};


/**
 * Transformation attribute group (GL_TRANSFORM_BIT).
 */
struct gl_transform_attrib
{
   GLenum MatrixMode;				/**< Matrix mode */
   GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];	/**< User clip planes */
   GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];	/**< derived */
   GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
   GLboolean Normalize;				/**< Normalize all normals? */
   GLboolean RescaleNormals;			/**< GL_EXT_rescale_normal */
   GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */

   GLboolean CullVertexFlag;	/**< True if GL_CULL_VERTEX_EXT is enabled */
   GLfloat CullEyePos[4];
   GLfloat CullObjPos[4];
};


/**
 * Viewport attribute group (GL_VIEWPORT_BIT).
 */
struct gl_viewport_attrib
{
   GLint X, Y;			/**< position */
   GLsizei Width, Height;	/**< size */
   GLfloat Near, Far;		/**< Depth buffer range */
   GLmatrix _WindowMap;		/**< Mapping transformation as a matrix. */
};


/**
 * Node for the attribute stack.
 */
struct gl_attrib_node
{
   GLbitfield kind;
   void *data;
   struct gl_attrib_node *next;
};


/**
 * GL_ARB_vertex/pixel_buffer_object buffer object
 */
struct gl_buffer_object
{
   GLint RefCount;
   GLuint Name;
   GLenum Usage;
   GLenum Access;
   GLvoid *Pointer;          /**< Only valid while buffer is mapped */
   GLsizeiptrARB Size;       /**< Size of storage in bytes */
   GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
   GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
};



/**
 * Client pixel packing/unpacking attributes
 */
struct gl_pixelstore_attrib
{
   GLint Alignment;
   GLint RowLength;
   GLint SkipPixels;
   GLint SkipRows;
   GLint ImageHeight;     /**< for GL_EXT_texture3D */
   GLint SkipImages;      /**< for GL_EXT_texture3D */
   GLboolean SwapBytes;
   GLboolean LsbFirst;
   GLboolean ClientStorage; /**< GL_APPLE_client_storage */
   GLboolean Invert;        /**< GL_MESA_pack_invert */
   struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
};


#define CA_CLIENT_DATA     0x1	/**< Data not allocated by mesa */


/**
 * Client vertex array attributes
 */
struct gl_client_array
{
   GLint Size;                  /**< components per element (1,2,3,4) */
   GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
   GLsizei Stride;		/**< user-specified stride */
   GLsizei StrideB;		/**< actual stride in bytes */
   const GLubyte *Ptr;          /**< Points to array data */
   GLuint Enabled;		/**< one of the _NEW_ARRAY_ bits */
   GLboolean Normalized;        /**< GL_ARB_vertex_program */

   /**< GL_ARB_vertex_buffer_object */
   struct gl_buffer_object *BufferObj;
   GLuint _MaxElement;

   GLuint Flags;
};


/**
 * Vertex array state
 */
struct gl_array_attrib
{
   struct gl_client_array Vertex;	     /**< client data descriptors */
   struct gl_client_array Normal;
   struct gl_client_array Color;
   struct gl_client_array SecondaryColor;
   struct gl_client_array FogCoord;
   struct gl_client_array Index;
   struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
   struct gl_client_array EdgeFlag;

   struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */

   GLint ActiveTexture;		/**< Client Active Texture */
   GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
   GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */

   GLuint _Enabled;		/**< _NEW_ARRAY_* - bit set if array enabled */
   GLuint NewState;		/**< _NEW_ARRAY_* */

#if FEATURE_ARB_vertex_buffer_object
   struct gl_buffer_object *NullBufferObj;
   struct gl_buffer_object *ArrayBufferObj;
   struct gl_buffer_object *ElementArrayBufferObj;
#endif
   GLuint _MaxElement;          /* Min of all enabled array's maxes */
};


/**
 * Feedback buffer state
 */
struct gl_feedback
{
   GLenum Type;
   GLuint _Mask;		/* FB_* bits */
   GLfloat *Buffer;
   GLuint BufferSize;
   GLuint Count;
};


/**
 * Selection buffer state
 */
struct gl_selection
{
   GLuint *Buffer;	/**< selection buffer */
   GLuint BufferSize;	/**< size of the selection buffer */
   GLuint BufferCount;	/**< number of values in the selection buffer */
   GLuint Hits;		/**< number of records in the selection buffer */
   GLuint NameStackDepth; /**< name stack depth */
   GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
   GLboolean HitFlag;	/**< hit flag */
   GLfloat HitMinZ;	/**< minimum hit depth */
   GLfloat HitMaxZ;	/**< maximum hit depth */
};


/**
 * 1-D Evaluator control points
 */
struct gl_1d_map
{
   GLuint Order;	/**< Number of control points */
   GLfloat u1, u2, du;	/**< u1, u2, 1.0/(u2-u1) */
   GLfloat *Points;	/**< Points to contiguous control points */
};


/**
 * 2-D Evaluator control points
 */
struct gl_2d_map
{
   GLuint Uorder;		/**< Number of control points in U dimension */
   GLuint Vorder;		/**< Number of control points in V dimension */
   GLfloat u1, u2, du;
   GLfloat v1, v2, dv;
   GLfloat *Points;		/**< Points to contiguous control points */
};


/**
 * All evaluator control point state
 */
struct gl_evaluators
{
   /** 
    * \name 1-D maps
    */
   /*@{*/
   struct gl_1d_map Map1Vertex3;
   struct gl_1d_map Map1Vertex4;
   struct gl_1d_map Map1Index;
   struct gl_1d_map Map1Color4;
   struct gl_1d_map Map1Normal;
   struct gl_1d_map Map1Texture1;
   struct gl_1d_map Map1Texture2;
   struct gl_1d_map Map1Texture3;
   struct gl_1d_map Map1Texture4;
   struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
   /*@}*/

   /** 
    * \name 2-D maps 
    */
   /*@{*/
   struct gl_2d_map Map2Vertex3;
   struct gl_2d_map Map2Vertex4;
   struct gl_2d_map Map2Index;
   struct gl_2d_map Map2Color4;
   struct gl_2d_map Map2Normal;
   struct gl_2d_map Map2Texture1;