mtypes.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

   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;
   struct gl_2d_map Map2Texture2;
   struct gl_2d_map Map2Texture3;
   struct gl_2d_map Map2Texture4;
   struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
   /*@}*/
};


/**
 * Names of the various vertex/fragment program register files, etc.
 *
 * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
 * All values should fit in a 4-bit field.
 *
 * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
 * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
 * be "uniform" variables since they can only be set outside glBegin/End.
 * They're also all stored in the same Parameters array.
 */
enum register_file
{
   PROGRAM_TEMPORARY = 0,   /**< machine->Temporary[] */
   PROGRAM_LOCAL_PARAM = 1, /**< gl_program->LocalParams[] */
   PROGRAM_ENV_PARAM = 2,   /**< gl_program->Parameters[] */
   PROGRAM_STATE_VAR = 3,   /**< gl_program->Parameters[] */
   PROGRAM_INPUT = 4,       /**< machine->Inputs[] */
   PROGRAM_OUTPUT = 5,      /**< machine->Outputs[] */
   PROGRAM_NAMED_PARAM = 6, /**< gl_program->Parameters[] */
   PROGRAM_CONSTANT = 7,    /**< gl_program->Parameters[] */
   PROGRAM_UNIFORM = 8,     /**< gl_program->Parameters[] */
   PROGRAM_VARYING = 9,     /**< machine->Inputs[]/Outputs[] */
   PROGRAM_WRITE_ONLY = 10, /**< A dummy, write-only register */
   PROGRAM_ADDRESS = 11,    /**< machine->AddressReg */
   PROGRAM_SAMPLER = 12,    /**< for shader samplers, compile-time only */
   PROGRAM_UNDEFINED = 13,  /**< Invalid value */
   PROGRAM_FILE_MAX
};


/** Vertex and fragment instructions */
struct prog_instruction;
struct gl_program_parameter_list;
struct gl_uniform_list;


/**
 * Base class for any kind of program object
 */
struct gl_program
{
   GLuint Id;
   GLubyte *String;  /**< Null-terminated program text */
   GLint RefCount;
   GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
   GLenum Format;    /**< String encoding format */
   GLboolean Resident;

   struct prog_instruction *Instructions;

   GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
   GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
   GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
   GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
   GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */

   /** Named parameters, constants, etc. from program text */
   struct gl_program_parameter_list *Parameters;
   /** Numbered local parameters */
   GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];

   /** Vertex/fragment shader varying vars */
   struct gl_program_parameter_list *Varying;
   /** Vertex program user-defined attributes */
   struct gl_program_parameter_list *Attributes;

   /** Map from sampler unit to texture unit (set by glUniform1i()) */
   GLubyte SamplerUnits[MAX_SAMPLERS];
   /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
   GLubyte SamplerTargets[MAX_SAMPLERS];

   /** Logical counts */
   /*@{*/
   GLuint NumInstructions;
   GLuint NumTemporaries;
   GLuint NumParameters;
   GLuint NumAttributes;
   GLuint NumAddressRegs;
   GLuint NumAluInstructions;
   GLuint NumTexInstructions;
   GLuint NumTexIndirections;
   /*@}*/
   /** Native, actual h/w counts */
   /*@{*/
   GLuint NumNativeInstructions;
   GLuint NumNativeTemporaries;
   GLuint NumNativeParameters;
   GLuint NumNativeAttributes;
   GLuint NumNativeAddressRegs;
   GLuint NumNativeAluInstructions;
   GLuint NumNativeTexInstructions;
   GLuint NumNativeTexIndirections;
   /*@}*/
};


/** Vertex program object */
struct gl_vertex_program
{
   struct gl_program Base;   /**< base class */
   GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
   GLboolean IsPositionInvariant;
   void *TnlData;		/**< should probably use Base.DriverData */
};


/** Fragment program object */
struct gl_fragment_program
{
   struct gl_program Base;   /**< base class */
   GLenum FogOption;
   GLboolean UsesKill;
};


/**
 * State common to vertex and fragment programs.
 */
struct gl_program_state
{
   GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
   const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
};


/**
 * Context state for vertex programs.
 */
struct gl_vertex_program_state
{
   GLboolean Enabled;               /**< GL_VERTEX_PROGRAM_ARB/NV */
   GLboolean _Enabled;              /**< Enabled and valid program? */
   GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
   GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
   struct gl_vertex_program *Current;  /**< user-bound vertex program */

   /** Currently enabled and valid program (including internal programs
    * and compiled shader programs).
    */
   struct gl_vertex_program *_Current;

   GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */

   /* For GL_NV_vertex_program only: */
   GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
   GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];

   /** Should fixed-function T&L be implemented with a vertex prog? */
   GLboolean _MaintainTnlProgram;

   /** Program to emulate fixed-function T&L (see above) */
   struct gl_vertex_program *_TnlProgram;

#if FEATURE_MESA_program_debug
   GLprogramcallbackMESA Callback;
   GLvoid *CallbackData;
   GLboolean CallbackEnabled;
   GLuint CurrentPosition;
#endif
};


/**
 * Context state for fragment programs.
 */
struct gl_fragment_program_state
{
   GLboolean Enabled;     /**< User-set fragment program enable flag */
   GLboolean _Enabled;    /**< Fragment program enabled and valid? */
   GLboolean _Active;
   struct gl_fragment_program *Current;  /**< User-bound fragment program */

   /** Currently enabled and valid program (including internal programs
    * and compiled shader programs).
    */
   struct gl_fragment_program *_Current;

   GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */

   /** Should fixed-function texturing be implemented with a fragment prog? */
   GLboolean _MaintainTexEnvProgram;
   GLboolean _UseTexEnvProgram;

   /** Program to emulate fixed-function texture env/combine (see above) */
   struct gl_fragment_program *_TexEnvProgram;

#if FEATURE_MESA_program_debug
   GLprogramcallbackMESA Callback;
   GLvoid *CallbackData;
   GLboolean CallbackEnabled;
   GLuint CurrentPosition;
#endif
};


/**
 * ATI_fragment_shader runtime state
 */
#define ATI_FS_INPUT_PRIMARY 0
#define ATI_FS_INPUT_SECONDARY 1

struct atifs_instruction;
struct atifs_setupinst;

/**
 * ATI fragment shader
 */
struct ati_fragment_shader
{
   GLuint Id;
   GLint RefCount;
   struct atifs_instruction *Instructions[2];
   struct atifs_setupinst *SetupInst[2];
   GLfloat Constants[8][4];
   GLbitfield LocalConstDef;  /** Indicates which constants have been set */
   GLubyte numArithInstr[2];
   GLubyte regsAssigned[2];
   GLubyte NumPasses;         /** 1 or 2 */
   GLubyte cur_pass;
   GLubyte last_optype;
   GLboolean interpinp1;
   GLboolean isValid;
   GLuint swizzlerq;
};

/**
 * Context state for GL_ATI_fragment_shader
 */
struct gl_ati_fragment_shader_state
{
   GLboolean Enabled;
   GLboolean _Enabled;                      /** enabled and valid shader? */
   GLboolean Compiling;
   GLfloat GlobalConstants[8][4];
   struct ati_fragment_shader *Current;
};


/**
 * Occlusion/timer query object.
 */
struct gl_query_object
{
   GLuint Id;
   GLuint64EXT Result; /* the counter */
   GLboolean Active;   /* inside Begin/EndQuery */
   GLboolean Ready;    /* result is ready */
};


/**
 * Context state for query objects.
 */
struct gl_query_state
{
   struct _mesa_HashTable *QueryObjects;
   struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
   struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
};



/**
 * A GLSL vertex or fragment shader object.
 */
struct gl_shader
{
   GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER (first field!) */
   GLuint Name;  /**< AKA the handle */
   GLint RefCount;  /**< Reference count */
   GLboolean DeletePending;

   const GLchar *Source;  /**< Source code string */
   GLboolean CompileStatus;
   struct gl_program *Program;  /**< Post-compile assembly code */
   GLchar *InfoLog;
   GLboolean Main;  /**< shader defines main() */
};


/**
 * A GLSL program object.
 * Basically a linked collection of vertex and fragment shaders.
 */
struct gl_shader_program
{
   GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
   GLuint Name;  /**< aka handle or ID */
   GLint RefCount;  /**< Reference count */
   GLboolean DeletePending;

   GLuint NumShaders;          /**< number of attached shaders */
   struct gl_shader **Shaders; /**< List of attached the shaders */

   /** User-defined attribute bindings (glBindAttribLocation) */
   struct gl_program_parameter_list *Attributes;

   /* post-link info: */
   struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
   struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
   struct gl_uniform_list *Uniforms;
   struct gl_program_parameter_list *Varying;
   GLboolean LinkStatus;   /**< GL_LINK_STATUS */
   GLboolean Validated;
   GLchar *InfoLog;
};   


/**
 * Context state for GLSL vertex/fragment shaders.
 */
struct gl_shader_state
{
   struct gl_shader_program *CurrentProgram; /**< The user-bound program */
   /** Driver-selectable options: */
   GLboolean EmitHighLevelInstructions; /**< IF/ELSE/ENDIF vs. BRA, etc. */
   GLboolean EmitCondCodes;             /**< Use condition codes? */
   GLboolean EmitComments;              /**< Annotated instructions */
   void *MemPool;
};


/**
 * State which can be shared by multiple contexts:
 */
struct gl_shared_state
{
   _glthread_Mutex Mutex;		   /**< for thread safety */
   GLint RefCount;			   /**< Reference count */
   struct _mesa_HashTable *DisplayList;	   /**< Display lists hash table */
   struct _mesa_HashTable *TexObjects;	   /**< Texture objects hash table */

   /**
    * \name Default texture objects (shared by all multi-texture units)
    */
   /*@{*/
   struct gl_texture_object *Default1D;
   struct gl_texture_object *Default2D;
   struct gl_texture_object *Default3D;
   struct gl_texture_object *DefaultCubeMap;
   struct gl_texture_object *DefaultRect;
   struct gl_texture_object *Default1DArray;
   struct gl_texture_object *Default2DArray;
   /*@}*/

   /**
    * \name Thread safety and statechange notification for texture
    * objects. 
    *
    * \todo Improve the granularity of locking.
    */
   /*@{*/
   _glthread_Mutex TexMutex;		/**< texobj thread safety */
   GLuint TextureStateStamp;	        /**< state notification for shared tex */
   /*@}*/


   /**
    * \name Vertex/fragment programs
    */
   /*@{*/
   struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
#if FEATURE_ARB_vertex_program
   struct gl_vertex_program *DefaultVertexProgram;
#endif
#if FEATURE_ARB_fragment_program
   struct gl_fragment_program *