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/* $Id: t_context.h,v 1.1 2003-02-28 11:48:06 pj Exp $ */
/*
* Mesa 3-D graphics library
* Version: 4.1
*
* Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file t_context.h
* \brief TnL module datatypes and definitions.
* \author Keith Whitwell
*/
#ifndef _T_CONTEXT_H
#define _T_CONTEXT_H
#include "glheader.h"
#include "mtypes.h"
#include "math/m_matrix.h"
#include "math/m_vector.h"
#include "math/m_xform.h"
#define MAX_PIPELINE_STAGES 30
/* Numbers for sizing immediate structs.
*/
#define IMM_MAX_COPIED_VERTS 3
#define IMM_MAXDATA (216 + IMM_MAX_COPIED_VERTS)
#define IMM_SIZE (IMM_MAXDATA + MAX_CLIPPED_VERTICES)
/* Values for IM->BeginState
*/
#define VERT_BEGIN_0 0x1 /* glBegin (if initially inside beg/end) */
#define VERT_BEGIN_1 0x2 /* glBegin (if initially outside beg/end) */
#define VERT_ERROR_0 0x4 /* invalid_operation in initial state 0 */
#define VERT_ERROR_1 0x8 /* invalid_operation in initial state 1 */
/* Flags to be added to the primitive enum in VB->Primitive.
*/
#define PRIM_MODE_MASK 0xff /* Extract the actual primitive */
#define PRIM_BEGIN 0x100 /* The prim starts here (not wrapped) */
#define PRIM_END 0x200 /* The prim ends in this VB (does not wrap) */
#define PRIM_PARITY 0x400 /* The prim wrapped on an odd number of verts */
#define PRIM_LAST 0x800 /* No more prims in the VB */
/**
* Flags that describe the inputs and outputs of pipeline stages, and
* the contents of a vertex-cassette. We reuse the VERT_BIT_* flags
* defined in mtypes.h and add a bunch of new ones.
*/
/* bits 0..5 defined in mtypes.h */
#define VERT_BIT_INDEX VERT_BIT_SIX /* a free vertex attrib bit */
#define VERT_BIT_EDGEFLAG VERT_BIT_SEVEN /* a free vertex attrib bit */
/* bits 8..15 defined in mtypes.h */
#define VERT_BIT_EVAL_C1 (1 << 16) /* imm only */
#define VERT_BIT_EVAL_C2 (1 << 17) /* imm only */
#define VERT_BIT_EVAL_P1 (1 << 18) /* imm only */
#define VERT_BIT_EVAL_P2 (1 << 19) /* imm only */
#define VERT_BIT_OBJ_3 (1 << 20) /* imm only */
#define VERT_BIT_OBJ_4 (1 << 21) /* imm only */
#define VERT_BIT_MATERIAL (1 << 22) /* imm only, but tested in vb code */
#define VERT_BIT_ELT (1 << 23) /* imm only */
#define VERT_BIT_BEGIN (1 << 24) /* imm only, but tested in vb code */
#define VERT_BIT_END (1 << 25) /* imm only, but tested in vb code */
#define VERT_BIT_END_VB (1 << 26) /* imm only, but tested in vb code */
#define VERT_BIT_POINT_SIZE (1 << 27) /* vb only, could reuse a bit */
#define VERT_BIT_EYE VERT_BIT_BEGIN /* vb only, reuse imm bit */
#define VERT_BIT_CLIP VERT_BIT_END /* vb only, reuse imm bit*/
/* Flags for IM->TexCoordSize. Enough flags for 16 units.
*/
#define TEX_0_SIZE_3 (unsigned)0x1
#define TEX_0_SIZE_4 (unsigned)0x10001
#define TEX_SIZE_3(unit) (TEX_0_SIZE_3 << (unit))
#define TEX_SIZE_4(unit) (TEX_0_SIZE_4 << (unit))
/* Shorthands.
*/
#define VERT_BITS_OBJ_23 (VERT_BIT_POS | VERT_BIT_OBJ_3)
#define VERT_BITS_OBJ_234 (VERT_BIT_POS | VERT_BIT_OBJ_3 | VERT_BIT_OBJ_4)
#define VERT_BITS_TEX_ANY (VERT_BIT_TEX0 | \
VERT_BIT_TEX1 | \
VERT_BIT_TEX2 | \
VERT_BIT_TEX3 | \
VERT_BIT_TEX4 | \
VERT_BIT_TEX5 | \
VERT_BIT_TEX6 | \
VERT_BIT_TEX7)
#define VERT_BITS_EVAL_ANY (VERT_BIT_EVAL_C1 | VERT_BIT_EVAL_P1 | \
VERT_BIT_EVAL_C2 | VERT_BIT_EVAL_P2)
#define VERT_BITS_FIXUP (VERT_BITS_TEX_ANY | \
VERT_BIT_COLOR0 | \
VERT_BIT_COLOR1 | \
VERT_BIT_FOG | \
VERT_BIT_INDEX | \
VERT_BIT_EDGEFLAG | \
VERT_BIT_NORMAL)
#define VERT_BITS_CURRENT_DATA (VERT_BITS_FIXUP | \
VERT_BIT_MATERIAL)
#define VERT_BITS_DATA (VERT_BITS_TEX_ANY | \
VERT_BIT_COLOR0 | \
VERT_BIT_COLOR1 | \
VERT_BIT_FOG | \
VERT_BIT_INDEX | \
VERT_BIT_EDGEFLAG | \
VERT_BIT_NORMAL | \
VERT_BIT_POS | \
VERT_BIT_MATERIAL | \
VERT_BIT_ELT | \
VERT_BITS_EVAL_ANY)
/**
* KW: Represents everything that can take place between a begin and
* end, and can represent multiple begin/end pairs. Can be used to
* losslessly encode this information in display lists.
*/
struct immediate
{
GLuint id, ref_count;
/* This must be saved when immediates are shared in display lists.
*/
GLuint CopyStart, Start, Count;
GLuint LastData; /* count or count+1 */
GLuint AndFlag, OrFlag;
GLuint TexSize; /* keep track of texcoord sizes */
GLuint BeginState, SavedBeginState;
GLuint LastPrimitive;
GLuint ArrayEltFlags; /* precalc'ed for glArrayElt */
GLuint ArrayEltIncr;
GLuint ArrayEltFlush;
#define FLUSH_ELT_EAGER 0x1
#define FLUSH_ELT_LAZY 0x2
GLuint FlushElt;
GLuint MaxTextureUnits; /* precalc'ed for glMultiTexCoordARB */
/* Temporary values created when vertices are copied into the
* first 3 slots of the struct:
*/
GLuint CopyOrFlag;
GLuint CopyAndFlag;
GLuint CopyTexSize;
GLuint Evaluated;
/* allocate storage for these on demand:
*/
struct gl_material (*Material)[2];
GLuint *MaterialMask;
GLuint LastMaterial;
GLuint MaterialOrMask;
GLuint MaterialAndMask;
GLuint Primitive[IMM_SIZE]; /* BEGIN/END */
GLuint PrimitiveLength[IMM_SIZE]; /* BEGIN/END */
GLuint Flag[IMM_SIZE]; /* VERT_BIT_* flags */
/* All vertex attributes (position, normal, color, secondary color,
* texcoords, fog coord) are stored in the Attrib[] arrays instead
* of individual arrays as we did prior to Mesa 4.1.
*
* XXX may need to use 32-byte aligned allocation for this!!!
*/
GLfloat Attrib[VERT_ATTRIB_MAX][IMM_SIZE][4]; /* GL_NV_vertex_program */
GLfloat *NormalLengthPtr; /* length of normal vectors (display list only) */
GLuint Elt[IMM_SIZE];
GLubyte EdgeFlag[IMM_SIZE];
GLuint Index[IMM_SIZE];
};
struct vertex_arrays
{
/* XXX move a bunch of these fields into the Attribs[] array??? */
GLvector4f Obj;
GLvector4f Normal;
struct gl_client_array Color;
struct gl_client_array SecondaryColor;
GLvector1ui Index;
GLvector1ub EdgeFlag;
GLvector4f TexCoord[MAX_TEXTURE_UNITS];
GLvector1ui Elt;
GLvector4f FogCoord;
GLvector4f Attribs[VERT_ATTRIB_MAX];
};
/**
* Contains the current state of a running pipeline.
*/
typedef struct vertex_buffer
{
/* Constant over life of the vertex_buffer.
*/
GLuint Size;
/* Constant over the pipeline.
*/
GLuint Count; /* for everything except Elts */
GLuint FirstClipped; /* temp verts for clipping */
GLuint FirstPrimitive; /* usually zero */
/* Pointers to current data.
*/
GLuint *Elts; /* VERT_BIT_ELT */
GLvector4f *ObjPtr; /* VERT_BIT_POS */
GLvector4f *EyePtr; /* VERT_BIT_EYE */
GLvector4f *ClipPtr; /* VERT_BIT_CLIP */
GLvector4f *NdcPtr; /* VERT_BIT_CLIP (2) */
GLubyte ClipOrMask; /* VERT_BIT_CLIP (3) */
GLubyte *ClipMask; /* VERT_BIT_CLIP (4) */
GLvector4f *NormalPtr; /* VERT_BIT_NORMAL */
GLfloat *NormalLengthPtr; /* VERT_BIT_NORMAL */
GLboolean *EdgeFlag; /* VERT_BIT_EDGEFLAG */
GLvector4f *TexCoordPtr[MAX_TEXTURE_UNITS]; /* VERT_TEX_0..n */
GLvector1ui *IndexPtr[2]; /* VERT_BIT_INDEX */
struct gl_client_array *ColorPtr[2]; /* VERT_BIT_COLOR0 */
struct gl_client_array *SecondaryColorPtr[2];/* VERT_BIT_COLOR1 */
GLvector4f *PointSizePtr; /* VERT_BIT_POINT_SIZE */
GLvector4f *FogCoordPtr; /* VERT_BIT_FOG */
struct gl_material (*Material)[2]; /* VERT_BIT_MATERIAL, optional */
GLuint *MaterialMask; /* VERT_BIT_MATERIAL, optional */
GLuint *Flag; /* VERT_BIT_* flags, optional */
GLuint *Primitive; /* GL_(mode)|PRIM_* flags */
GLuint *PrimitiveLength; /* integers */
/* Inputs to the vertex program stage */
GLvector4f *AttribPtr[VERT_ATTRIB_MAX]; /* GL_NV_vertex_program */
GLuint importable_data;
void *import_source;
void (*import_data)( GLcontext *ctx, GLuint flags, GLuint vecflags );
/* Callback to the provider of the untransformed input for the
* render stage (or other stages) to call if they need to write into
* write-protected arrays, or fixup the stride on input arrays.
*
* This is currently only necessary for client arrays that make it
* as far down the pipeline as the render stage.
*/
GLuint LastClipped;
/* Private data from _tnl_render_stage that has no business being
* in this struct.
*/
} TNLvertexbuffer;
/* Describes an individual operation on the pipeline.
*/
struct gl_pipeline_stage {
const char *name;
GLuint check_state; /* All state referenced in check() --
* When is the pipeline_stage struct
* itself invalidated? Must be
* constant.
*/
/* Usually constant or set by the 'check' callback:
*/
GLuint run_state; /* All state referenced in run() --
* When is the cached output of the
* stage invalidated?
*/
GLboolean active; /* True if runnable in current state */
GLuint inputs; /* VERT_* inputs to the stage */
GLuint outputs; /* VERT_* outputs of the stage */
/* Set in _tnl_run_pipeline():
*/
GLuint changed_inputs; /* Generated value -- inputs to the
* stage that have changed since last
* call to 'run'.
*/
/* Private data for the pipeline stage:
*/
void *privatePtr;
/* Free private data. May not be null.
*/
void (*destroy)( struct gl_pipeline_stage * );
/* Called from _tnl_validate_pipeline(). Must update all fields in
* the pipeline_stage struct for the current state.
*/
void (*check)( GLcontext *ctx, struct gl_pipeline_stage * );
/* Called from _tnl_run_pipeline(). The stage.changed_inputs value
* encodes all inputs to thee struct which have changed. If
* non-zero, recompute all affected outputs of the stage, otherwise
* execute any 'sideeffects' of the stage.
*
* Return value: GL_TRUE - keep going
* GL_FALSE - finished pipeline
*/
GLboolean (*run)( GLcontext *ctx, struct gl_pipeline_stage * );
};
struct gl_pipeline {
GLuint build_state_trigger; /* state changes which require build */
GLuint build_state_changes; /* state changes since last build */
GLuint run_state_changes; /* state changes since last run */
GLuint run_input_changes; /* VERT_* changes since last run */
GLuint inputs; /* VERT_* inputs to pipeline */
struct gl_pipeline_stage stages[MAX_PIPELINE_STAGES+1];
GLuint nr_stages;
};
struct tnl_eval_store {
GLuint EvalMap1Flags;
GLuint EvalMap2Flags;
GLuint EvalMap1AttribFlags; /* GL_NV_vertex_program */
GLuint EvalMap2AttribFlags; /* GL_NV_vertex_program */
GLuint EvalNewState;
struct immediate *im; /* used for temporary data */
};
typedef void (*points_func)( GLcontext *ctx, GLuint first, GLuint last );
typedef void (*line_func)( GLcontext *ctx, GLuint v1, GLuint v2 );
typedef void (*triangle_func)( GLcontext *ctx,
GLuint v1, GLuint v2, GLuint v3 );
typedef void (*quad_func)( GLcontext *ctx, GLuint v1, GLuint v2,
GLuint v3, GLuint v4 );
typedef void (*render_func)( GLcontext *ctx, GLuint start, GLuint count,
GLuint flags );
typedef void (*interp_func)( GLcontext *ctx,
GLfloat t, GLuint dst, GLuint out, GLuint in,
GLboolean force_boundary );
typedef void (*copy_pv_func)( GLcontext *ctx, GLuint dst, GLuint src );
typedef void (*setup_func)( GLcontext *ctx,
GLuint start, GLuint end,
GLuint new_inputs);
struct tnl_device_driver {
/***
*** TNL Pipeline
***/
void (*RunPipeline)(GLcontext *ctx);
/* Replaces PipelineStart/PipelineFinish -- intended to allow
* drivers to wrap _tnl_run_pipeline() with code to validate state
* and grab/release hardware locks.
*/
void (*NotifyMaterialChange)(GLcontext *ctx);
/* Alert tnl-aware drivers of changes to material.
*/
GLboolean (*NotifyBegin)(GLcontext *ctx, GLenum p);
/* Allow drivers to hook in optimized begin/end engines.
* Return value: GL_TRUE - driver handled the begin
* GL_FALSE - driver didn't handle the begin
*/
/***
*** Rendering -- These functions called only from t_vb_render.c
***/
struct {
void (*Start)(GLcontext *ctx);
void (*Finish)(GLcontext *ctx);
/* Called before and after all rendering operations, including DrawPixels,
* ReadPixels, Bitmap, span functions, and CopyTexImage, etc commands.
* These are a suitable place for grabbing/releasing hardware locks.
*/
void (*PrimitiveNotify)(GLcontext *ctx, GLenum mode);
/* Called between RenderStart() and RenderFinish() to indicate the
* type of primitive we're about to draw. Mode will be one of the
* modes accepted by glBegin().
*/
interp_func Interp;
/* The interp function is called by the clipping routines when we need
* to generate an interpolated vertex. All pertinant vertex ancilliary
* data should be computed by interpolating between the 'in' and 'out'
* vertices.
*/
copy_pv_func CopyPV;
/* The copy function is used to make a copy of a vertex. All pertinant
* vertex attributes should be copied.
*/
void (*ClippedPolygon)( GLcontext *ctx, const GLuint *elts, GLuint n );
/* Render a polygon with <n> vertices whose indexes are in the <elts>
* array.
*/
void (*ClippedLine)( GLcontext *ctx, GLuint v0, GLuint v1 );
/* Render a line between the two vertices given by indexes v0 and v1. */
points_func Points; /* must now respect vb->elts */
line_func Line;
triangle_func Triangle;
quad_func Quad;
/* These functions are called in order to render points, lines,
* triangles and quads. These are only called via the T&L module.
*/
render_func *PrimTabVerts;
render_func *PrimTabElts;
/* Render whole unclipped primitives (points, lines, linestrips,
* lineloops, etc). The tables are indexed by the GL enum of the
* primitive to be rendered. RenderTabVerts is used for non-indexed
* arrays of vertices. RenderTabElts is used for indexed arrays of
* vertices.
*/
void (*ResetLineStipple)( GLcontext *ctx );
/* Reset the hardware's line stipple counter.
*/
setup_func BuildVertices;
/* This function is called whenever new vertices are required for
* rendering. The vertices in question are those n such that start
* <= n < end. The new_inputs parameter indicates those fields of
* the vertex which need to be updated, if only a partial repair of
* the vertex is required.
*
* This function is called only from _tnl_render_stage in tnl/t_render.c.
*/
GLboolean (*Multipass)( GLcontext *ctx, GLuint passno );
/* Driver may request additional render passes by returning GL_TRUE
* when this function is called. This function will be called
* after the first pass, and passes will be made until the function
* returns GL_FALSE. If no function is registered, only one pass
* is made.
*
* This function will be first invoked with passno == 1.
*/
} Render;
};
typedef struct {
/* Driver interface.
*/
struct tnl_device_driver Driver;
/* Track whether the module is active.
*/
GLboolean bound_exec;
/* Display list extensions
*/
GLuint opcode_vertex_cassette;
/* Pipeline
*/
struct gl_pipeline pipeline;
struct vertex_buffer vb;
/* GLvectors for binding to vb:
*/
struct vertex_arrays imm_inputs;
struct vertex_arrays array_inputs;
GLuint *tmp_primitive;
GLuint *tmp_primitive_length;
/* Set when executing an internally generated begin/end object. If
* such an object is encountered in a display list, it will be
* replayed only if the list is outside any existing begin/end
* objects.
*/
GLboolean ReplayHardBeginEnd;
/* Note which vertices need copying over succesive immediates.
* Will add save versions to precompute vertex copying where
* possible.
*/
struct immediate *ExecCopySource;
GLuint ExecCopyCount;
GLuint ExecCopyElts[IMM_MAX_COPIED_VERTS];
GLuint ExecCopyTexSize;
GLuint ExecParity;
GLuint DlistPrimitive;
GLuint DlistPrimitiveLength;
GLuint DlistLastPrimitive;
/* Cache a single free immediate (refcount == 0)
*/
struct immediate *freed_immediate;
/* Probably need a better configuration mechanism:
*/
GLboolean NeedNdcCoords;
GLboolean LoopbackDListCassettes;
GLboolean CalcDListNormalLengths;
GLboolean IsolateMaterials;
/* Derived state and storage for _tnl_eval_vb:
*/
struct tnl_eval_store eval;
/* Functions to be plugged into dispatch when tnl is active.
*/
GLvertexformat vtxfmt;
GLvertexformat save_vtxfmt;
} TNLcontext;
#define TNL_CONTEXT(ctx) ((TNLcontext *)(ctx->swtnl_context))
#define TNL_CURRENT_IM(ctx) ((struct immediate *)(ctx->swtnl_im))
#define TYPE_IDX(t) ((t) & 0xf)
#define MAX_TYPES TYPE_IDX(GL_DOUBLE)+1 /* 0xa + 1 */
extern void _tnl_MakeCurrent( GLcontext *ctx,
GLframebuffer *drawBuffer,
GLframebuffer *readBuffer );
/*
* Macros for fetching current input buffer.
*/
#ifdef THREADS
#define GET_IMMEDIATE struct immediate *IM = TNL_CURRENT_IM(((GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())))
#define SET_IMMEDIATE(ctx, im) ctx->swtnl_im = (void *)im
#else
extern struct immediate *_tnl_CurrentInput;
#define GET_IMMEDIATE struct immediate *IM = _tnl_CurrentInput
#define SET_IMMEDIATE(ctx, im) \
do { \
ctx->swtnl_im = (void *)im; \
_tnl_CurrentInput = im; \
} while (0)
#endif
#endif