mtypes.h

mesa-6.5-minigui源码

 * All values should fit in a 4-bit field.
 */
enum register_file
{
   PROGRAM_TEMPORARY = 0,
   PROGRAM_LOCAL_PARAM = 1,
   PROGRAM_ENV_PARAM = 2,
   PROGRAM_STATE_VAR = 3,
   PROGRAM_INPUT = 4,
   PROGRAM_OUTPUT = 5,
   PROGRAM_NAMED_PARAM = 6,
   PROGRAM_CONSTANT = 7,
   PROGRAM_WRITE_ONLY = 8,
   PROGRAM_ADDRESS = 9,
   PROGRAM_UNDEFINED = 15  /* invalid value */
};


/** Vertex and fragment instructions */
struct prog_instruction;
struct program_parameter_list;


/**
 * Base class for any kind of program object
 */
struct program
{
   GLuint Id;
   GLubyte *String;          /**< Null-terminated program text */
   GLint RefCount;
   GLenum Target;
   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 */

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

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


/** Vertex program object */
struct vertex_program
{
   struct program Base;   /* base class */
   GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
   GLboolean IsPositionInvariant;  /* GL_ARB_vertex_program / GL_NV_vertex_program1_1 */
   void *TnlData;		/* should probably use Base.DriverData */
};


/** Fragment program object */
struct fragment_program
{
   struct program Base;   /**< base class */
   GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
   GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
   GLuint NumTexInstructions;
   GLuint NumTexIndirections;
   GLuint NumNativeAluInstructions; /**< GL_ARB_fragment_program */
   GLuint NumNativeTexInstructions;
   GLuint NumNativeTexIndirections;
   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 */
};


/**
 * State vars for GL_ARB/GL_NV_vertex_program
 */
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 vertex_program *Current;     /**< ptr to currently bound program */
   struct vertex_program *_Current;    /**< ptr to currently bound
					   program, including internal
					   (t_vp_build.c) programs */

   GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
   GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];

   GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
   /* Only used during program execution (may be moved someday): */
   GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
   GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
   GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
   GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
   GLint AddressReg[4];

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


/**
 * Context state for GL_ARB/NV_fragment_program
 */
struct gl_fragment_program_state
{
   GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
   GLboolean _Enabled;                   /* Enabled and valid program? */
   GLboolean _Active;
   struct fragment_program *Current;     /* ptr to currently bound program */
   struct fragment_program *_Current;    /* ptr to currently active program 
					    (including internal programs) */
   struct fp_machine Machine;            /* machine state */
   GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */

#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;

/**
 * State for executing ATI fragment shader.
 */
struct atifs_machine
{
   GLfloat Registers[6][4];         /** six temporary registers */
   GLfloat PrevPassRegisters[6][4];
   GLfloat Inputs[2][4];   /** Primary, secondary input colors */
};


/**
 * 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 atifs_machine Machine;            /* machine state */
   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 */
};


/**
 * Context state for vertex/fragment shaders.
 */
struct gl_shader_objects_state
{
   struct gl2_program_intf **CurrentProgram;
   GLboolean _VertexShaderPresent;
   GLboolean _FragmentShaderPresent;
};


/**
 * 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;
   /*@}*/

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

#if FEATURE_ATI_fragment_shader
   struct _mesa_HashTable *ATIShaders;
   struct ati_fragment_shader *DefaultFragmentShader;
#endif

#if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
   struct _mesa_HashTable *BufferObjects;
#endif

   struct _mesa_HashTable *GL2Objects;

#if FEATURE_EXT_framebuffer_object
   struct _mesa_HashTable *RenderBuffers;
   struct _mesa_HashTable *FrameBuffers;
#endif

   void *DriverData;  /**< Device driver shared state */
};




/**
 * A renderbuffer stores colors or depth values or stencil values.
 * A framebuffer object will have a collection of these.
 * Data are read/written to the buffer with a handful of Get/Put functions.
 *
 * Instances of this object are allocated with the Driver's NewRenderbuffer
 * hook.  Drivers will likely wrap this class inside a driver-specific
 * class to simulate inheritance.
 */
struct gl_renderbuffer
{
   _glthread_Mutex Mutex;		   /**< for thread safety */
   GLuint ClassID;        /**< Useful for drivers */
   GLuint Name;
   GLint RefCount;
   GLuint Width, Height;
   GLenum InternalFormat; /**< The user-specified format */
   GLenum _ActualFormat;  /**< The driver-chosen format */
   GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
                               GL_STENCIL_INDEX. */
   GLenum DataType;      /**< Type of values passed to the Get/Put functions */
   GLubyte RedBits;      /**< Bits of red per pixel */
   GLubyte GreenBits;
   GLubyte BlueBits;
   GLubyte AlphaBits;
   GLubyte IndexBits;
   GLubyte DepthBits;
   GLubyte StencilBits;
   GLvoid *Data;

   /* Used to wrap one renderbuffer around another: */
   struct gl_renderbuffer *Wrapped;

   /* Delete this renderbuffer */
   void (*Delete)(struct gl_renderbuffer *rb);

   /* Allocate new storage for this renderbuffer */
   GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
                             GLenum internalFormat,
                             GLuint width, GLuint height);

   /* Lock/Unlock are called before/after calling the Get/Put functions.
    * Not sure this is the right place for these yet.
   void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
   void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
    */

   /* Return a pointer to the element/pixel at (x,y).
    * Should return NULL if the buffer memory can't be directly addressed.
    */
   void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
                       GLint x, GLint y);

   /* Get/Read a row of values.
    * The values will be of format _BaseFormat and type DataType.
    */
   void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
                  GLint x, GLint y, void *values);

   /* Get/Read values at arbitrary locations.
    * The values will be of format _BaseFormat and type DataType.
    */
   void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
                     const GLint x[], const GLint y[], void *values);

   /* Put/Write a row of values.
    * The values will be of format _BaseFormat and type DataType.
    */
   void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
                  GLint x, GLint y, const void *values, const GLubyte *mask);

   /* Put/Write a row of RGB values.  This is a special-case routine that's
    * only used for RGBA renderbuffers when the source data is GL_RGB. That's
    * a common case for glDrawPixels and some triangle routines.
    * The values will be of format GL_RGB and type DataType.
    */
   void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
                    GLint x, GLint y, const void *values, const GLubyte *mask);


   /* Put/Write a row of identical values.
    * The values will be of format _BaseFormat and type DataType.
    */
   void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
                     GLint x, GLint y, const void *value, const GLubyte *mask);

   /* Put/Write values at arbitrary locations.
    * The values will be of format _BaseFormat and type DataType.
    */
   void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
                     const GLint x[], const GLint y[], const void *values,
                     const GLubyte *mask);
   /* Put/Write identical values at arbitrary locations.
    * The values will be of format _BaseFormat and type DataType.
    */
   void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
                         GLuint count, const GLint x[], const GLint y[],
                         const void *value, const GLubyte *mask);
};


/**
 * A renderbuffer attachment point points to either a texture object
 * (and specifies a mipmap level, cube face or 3D texture slice) or
 * points to a renderbuffer.
 */
struct gl_renderbuffer_attachment
{
   GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
   GLboolean Complete;

   /* IF Type == GL_RENDERBUFFER_EXT: */
   struct gl_renderbuffer *Renderbuffer;

   /* IF Type == GL_TEXTURE: */
   struct gl_texture_object *Texture;
   GLuint TextureLevel;
   GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
   GLuint Zoffset;      /* for 3D textures */
};


/**
 * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
 * In C++ terms, think of this as a base class from which device drivers
 * will make derived classes.
 */
struct gl_framebuffer
{
   _glthread_Mutex Mutex;		   /**< for thread safety */
   GLuint Name;      /* if