| /* |
| * mesa 3-D graphics library |
| * Version: 5.1 |
| * |
| * Copyright (C) 1999-2003 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 |
| */ |
| |
| |
| /** |
| * \mainpage The TNL-module |
| * |
| * TNL stands for "transform and lighting", i.e. this module implements |
| * a pipeline that receives as input a buffer of vertices and does all |
| * necessary transformations (rotations, clipping, vertex shader etc.) |
| * and passes then the output to the rasterizer. |
| * |
| * The tnl_pipeline contains the array of all stages, which should be |
| * applied. Each stage is a black-box, which is described by an |
| * tnl_pipeline_stage. The function ::_tnl_run_pipeline applies all the |
| * stages to the vertex_buffer TNLcontext::vb, where the vertex data |
| * is stored. The last stage in the pipeline is the rasterizer. |
| * |
| * The initial vertex_buffer data may either come from an ::immediate |
| * structure or client vertex_arrays or display lists: |
| * |
| * |
| * - The ::immediate structure records all the GL commands issued between |
| * glBegin and glEnd. \n |
| * The structure accumulates data, until it is either full or it is |
| * flushed (usually by a state change). Before starting then the pipeline, |
| * the collected vertex data in ::immediate has to be pushed into |
| * TNLcontext::vb. |
| * This happens in ::_tnl_vb_bind_immediate. The pipeline is then run by |
| * calling tnl_device_driver::RunPipeline = ::_tnl_run_pipeline, which |
| * is stored in TNLcontext::Driver. \n |
| * An ::immediate does (for performance reasons) usually not finish with a |
| * glEnd, and hence it also does not need to start with a glBegin. |
| * This means that the last vertices of one ::immediate may need to be |
| * saved for the next one. |
| * |
| * |
| * - NOT SURE ABOUT THIS: The vertex_arrays structure is used to handle |
| * glDrawArrays etc. \n |
| * Here, the data of the vertex_arrays is copied by ::_tnl_vb_bind_arrays |
| * into TNLcontext::vb, so that the pipeline can be started. |
| */ |
| |
| |
| #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 |
| |
| |
| /* |
| * Note: The first attributes match the VERT_ATTRIB_* definitions |
| * in mtypes.h. However, the tnl module has additional attributes |
| * for materials, color indexes, edge flags, etc. |
| */ |
| /* Note: These are currently being used to define both inputs and |
| * outputs from the tnl pipeline. A better solution (which would also |
| * releive the congestion to slightly prolong the life of the bitmask |
| * below) is to have the fixed function pipeline populate a set of |
| * arrays named after those produced by the vertex program stage, and |
| * have the rest the mesa backend work on those. |
| */ |
| enum { |
| _TNL_ATTRIB_POS = 0, |
| _TNL_ATTRIB_WEIGHT = 1, |
| _TNL_ATTRIB_NORMAL = 2, |
| _TNL_ATTRIB_COLOR0 = 3, |
| _TNL_ATTRIB_COLOR1 = 4, |
| _TNL_ATTRIB_FOG = 5, |
| _TNL_ATTRIB_SIX = 6, |
| _TNL_ATTRIB_SEVEN = 7, |
| _TNL_ATTRIB_TEX0 = 8, |
| _TNL_ATTRIB_TEX1 = 9, |
| _TNL_ATTRIB_TEX2 = 10, |
| _TNL_ATTRIB_TEX3 = 11, |
| _TNL_ATTRIB_TEX4 = 12, |
| _TNL_ATTRIB_TEX5 = 13, |
| _TNL_ATTRIB_TEX6 = 14, |
| _TNL_ATTRIB_TEX7 = 15, |
| _TNL_ATTRIB_MAT_FRONT_AMBIENT = 16, |
| _TNL_ATTRIB_MAT_BACK_AMBIENT = 17, |
| _TNL_ATTRIB_MAT_FRONT_DIFFUSE = 18, |
| _TNL_ATTRIB_MAT_BACK_DIFFUSE = 19, |
| _TNL_ATTRIB_MAT_FRONT_SPECULAR = 20, |
| _TNL_ATTRIB_MAT_BACK_SPECULAR = 21, |
| _TNL_ATTRIB_MAT_FRONT_EMISSION = 22, |
| _TNL_ATTRIB_MAT_BACK_EMISSION = 23, |
| _TNL_ATTRIB_MAT_FRONT_SHININESS = 24, |
| _TNL_ATTRIB_MAT_BACK_SHININESS = 25, |
| _TNL_ATTRIB_MAT_FRONT_INDEXES = 26, |
| _TNL_ATTRIB_MAT_BACK_INDEXES = 27, |
| _TNL_ATTRIB_INDEX = 28, |
| _TNL_ATTRIB_EDGEFLAG = 29, |
| _TNL_ATTRIB_POINTSIZE = 30, |
| _TNL_ATTRIB_MAX = 31 |
| } ; |
| |
| /* Will probably have to revise this scheme fairly shortly, eg. by |
| * compacting all the MAT flags down to one bit, or by using two |
| * dwords to store the flags. |
| */ |
| #define _TNL_BIT_POS (1<<0) |
| #define _TNL_BIT_WEIGHT (1<<1) |
| #define _TNL_BIT_NORMAL (1<<2) |
| #define _TNL_BIT_COLOR0 (1<<3) |
| #define _TNL_BIT_COLOR1 (1<<4) |
| #define _TNL_BIT_FOG (1<<5) |
| #define _TNL_BIT_SIX (1<<6) |
| #define _TNL_BIT_SEVEN (1<<7) |
| #define _TNL_BIT_TEX0 (1<<8) |
| #define _TNL_BIT_TEX1 (1<<9) |
| #define _TNL_BIT_TEX2 (1<<10) |
| #define _TNL_BIT_TEX3 (1<<11) |
| #define _TNL_BIT_TEX4 (1<<12) |
| #define _TNL_BIT_TEX5 (1<<13) |
| #define _TNL_BIT_TEX6 (1<<14) |
| #define _TNL_BIT_TEX7 (1<<15) |
| #define _TNL_BIT_MAT_FRONT_AMBIENT (1<<16) |
| #define _TNL_BIT_MAT_BACK_AMBIENT (1<<17) |
| #define _TNL_BIT_MAT_FRONT_DIFFUSE (1<<18) |
| #define _TNL_BIT_MAT_BACK_DIFFUSE (1<<19) |
| #define _TNL_BIT_MAT_FRONT_SPECULAR (1<<20) |
| #define _TNL_BIT_MAT_BACK_SPECULAR (1<<21) |
| #define _TNL_BIT_MAT_FRONT_EMISSION (1<<22) |
| #define _TNL_BIT_MAT_BACK_EMISSION (1<<23) |
| #define _TNL_BIT_MAT_FRONT_SHININESS (1<<24) |
| #define _TNL_BIT_MAT_BACK_SHININESS (1<<25) |
| #define _TNL_BIT_MAT_FRONT_INDEXES (1<<26) |
| #define _TNL_BIT_MAT_BACK_INDEXES (1<<27) |
| #define _TNL_BIT_INDEX (1<<28) |
| #define _TNL_BIT_EDGEFLAG (1<<29) |
| #define _TNL_BIT_POINTSIZE (1<<30) |
| |
| #define _TNL_BIT_TEX(u) (1 << (_TNL_ATTRIB_TEX0 + (u))) |
| |
| |
| |
| #define _TNL_BITS_MAT_ANY (_TNL_BIT_MAT_FRONT_AMBIENT | \ |
| _TNL_BIT_MAT_BACK_AMBIENT | \ |
| _TNL_BIT_MAT_FRONT_DIFFUSE | \ |
| _TNL_BIT_MAT_BACK_DIFFUSE | \ |
| _TNL_BIT_MAT_FRONT_SPECULAR | \ |
| _TNL_BIT_MAT_BACK_SPECULAR | \ |
| _TNL_BIT_MAT_FRONT_EMISSION | \ |
| _TNL_BIT_MAT_BACK_EMISSION | \ |
| _TNL_BIT_MAT_FRONT_SHININESS | \ |
| _TNL_BIT_MAT_BACK_SHININESS | \ |
| _TNL_BIT_MAT_FRONT_INDEXES | \ |
| _TNL_BIT_MAT_BACK_INDEXES) |
| |
| |
| #define _TNL_BITS_TEX_ANY (_TNL_BIT_TEX0 | \ |
| _TNL_BIT_TEX1 | \ |
| _TNL_BIT_TEX2 | \ |
| _TNL_BIT_TEX3 | \ |
| _TNL_BIT_TEX4 | \ |
| _TNL_BIT_TEX5 | \ |
| _TNL_BIT_TEX6 | \ |
| _TNL_BIT_TEX7) |
| |
| |
| #define _TNL_BITS_PROG_ANY (_TNL_BIT_POS | \ |
| _TNL_BIT_WEIGHT | \ |
| _TNL_BIT_NORMAL | \ |
| _TNL_BIT_COLOR0 | \ |
| _TNL_BIT_COLOR1 | \ |
| _TNL_BIT_FOG | \ |
| _TNL_BIT_SIX | \ |
| _TNL_BIT_SEVEN | \ |
| _TNL_BITS_TEX_ANY) |
| |
| |
| |
| #define PRIM_BEGIN 0x10 |
| #define PRIM_END 0x20 |
| #define PRIM_WEAK 0x40 |
| #define PRIM_MODE_MASK 0x0f |
| |
| /* |
| */ |
| struct tnl_prim { |
| GLuint mode; |
| GLuint start; |
| GLuint count; |
| }; |
| |
| |
| |
| struct tnl_eval1_map { |
| struct gl_1d_map *map; |
| GLuint sz; |
| }; |
| |
| struct tnl_eval2_map { |
| struct gl_2d_map *map; |
| GLuint sz; |
| }; |
| |
| struct tnl_eval { |
| GLuint new_state; |
| struct tnl_eval1_map map1[_TNL_ATTRIB_INDEX + 1]; |
| struct tnl_eval2_map map2[_TNL_ATTRIB_INDEX + 1]; |
| }; |
| |
| |
| #define TNL_MAX_PRIM 16 |
| #define TNL_MAX_COPIED_VERTS 3 |
| |
| struct tnl_copied_vtx { |
| GLfloat buffer[_TNL_ATTRIB_MAX * 4 * TNL_MAX_COPIED_VERTS]; |
| GLuint nr; |
| }; |
| |
| #define VERT_BUFFER_SIZE 2048 /* 8kbytes */ |
| |
| |
| typedef void (*attrfv_func)( const GLfloat * ); |
| |
| struct _tnl_dynfn { |
| struct _tnl_dynfn *next, *prev; |
| GLuint key; |
| char *code; |
| }; |
| |
| struct _tnl_dynfn_lists { |
| struct _tnl_dynfn Vertex[4]; |
| struct _tnl_dynfn Attribute[4]; |
| }; |
| |
| struct _tnl_dynfn_generators { |
| struct _tnl_dynfn *(*Vertex[4])( GLcontext *ctx, int key ); |
| struct _tnl_dynfn *(*Attribute[4])( GLcontext *ctx, int key ); |
| }; |
| |
| #define _TNL_MAX_ATTR_CODEGEN 16 |
| |
| |
| /* The assembly of vertices in immediate mode is separated from |
| * display list compilation. This allows a simpler immediate mode |
| * treatment and a display list compiler better suited to |
| * hardware-acceleration. |
| */ |
| struct tnl_vtx { |
| GLfloat buffer[VERT_BUFFER_SIZE]; |
| GLubyte attrsz[_TNL_ATTRIB_MAX]; |
| GLuint vertex_size; |
| struct tnl_prim prim[TNL_MAX_PRIM]; |
| GLuint prim_count; |
| GLfloat *vbptr; /* cursor, points into buffer */ |
| GLfloat vertex[_TNL_ATTRIB_MAX*4]; /* current vertex */ |
| GLfloat *attrptr[_TNL_ATTRIB_MAX]; /* points into vertex */ |
| GLfloat *current[_TNL_ATTRIB_MAX]; /* points into ctx->Current, etc */ |
| GLuint counter, initial_counter; |
| struct tnl_copied_vtx copied; |
| |
| attrfv_func tabfv[_TNL_MAX_ATTR_CODEGEN+1][4]; /* plus 1 for ERROR_ATTRIB */ |
| |
| struct _tnl_dynfn_lists cache; |
| struct _tnl_dynfn_generators gen; |
| |
| struct tnl_eval eval; |
| GLboolean *edgeflag_tmp; |
| GLboolean have_materials; |
| }; |
| |
| |
| |
| |
| /* For display lists, this structure holds a run of vertices of the |
| * same format, and a strictly well-formed set of begin/end pairs, |
| * starting on the first vertex and ending at the last. Vertex |
| * copying on buffer breaks is precomputed according to these |
| * primitives, though there are situations where the copying will need |
| * correction at execute-time, perhaps by replaying the list as |
| * immediate mode commands. |
| * |
| * On executing this list, the 'current' values may be updated with |
| * the values of the final vertex, and often no fixup of the start of |
| * the vertex list is required. |
| * |
| * Eval and other commands that don't fit into these vertex lists are |
| * compiled using the fallback opcode mechanism provided by dlist.c. |
| */ |
| struct tnl_vertex_list { |
| GLubyte attrsz[_TNL_ATTRIB_MAX]; |
| GLuint vertex_size; |
| |
| GLfloat *buffer; |
| GLuint count; |
| GLuint wrap_count; /* number of copied vertices at start */ |
| GLboolean have_materials; /* bit of a hack - quick check for materials */ |
| GLboolean dangling_attr_ref; /* current attr implicitly referenced |
| outside the list */ |
| |
| GLfloat *normal_lengths; |
| struct tnl_prim *prim; |
| GLuint prim_count; |
| |
| struct tnl_vertex_store *vertex_store; |
| struct tnl_primitive_store *prim_store; |
| }; |
| |
| /* These buffers should be a reasonable size to support upload to |
| * hardware? Maybe drivers should stitch them back together, or |
| * specify a desired size? |
| */ |
| #define SAVE_BUFFER_SIZE (16*1024) |
| #define SAVE_PRIM_SIZE 128 |
| |
| /* Storage to be shared among several vertex_lists. |
| */ |
| struct tnl_vertex_store { |
| GLfloat buffer[SAVE_BUFFER_SIZE]; |
| GLuint used; |
| GLuint refcount; |
| }; |
| |
| struct tnl_primitive_store { |
| struct tnl_prim buffer[SAVE_PRIM_SIZE]; |
| GLuint used; |
| GLuint refcount; |
| }; |
| |
| |
| struct tnl_save { |
| GLubyte attrsz[_TNL_ATTRIB_MAX]; |
| GLuint vertex_size; |
| |
| GLfloat *buffer; |
| GLuint count; |
| GLuint wrap_count; |
| |
| struct tnl_prim *prim; |
| GLuint prim_count, prim_max; |
| |
| struct tnl_vertex_store *vertex_store; |
| struct tnl_primitive_store *prim_store; |
| |
| GLfloat *vbptr; /* cursor, points into buffer */ |
| GLfloat vertex[_TNL_ATTRIB_MAX*4]; /* current values */ |
| GLfloat *attrptr[_TNL_ATTRIB_MAX]; |
| GLuint counter, initial_counter; |
| GLboolean dangling_attr_ref; |
| GLboolean have_materials; |
| |
| GLuint opcode_vertex_list; |
| |
| struct tnl_copied_vtx copied; |
| |
| GLfloat *current[_TNL_ATTRIB_MAX]; /* points into ctx->ListState */ |
| GLubyte *currentsz[_TNL_ATTRIB_MAX]; |
| |
| void (*tabfv[_TNL_ATTRIB_MAX][4])( const GLfloat * ); |
| }; |
| |
| |
| struct tnl_vertex_arrays |
| { |
| /* Conventional vertex attribute arrays */ |
| GLvector4f Obj; |
| GLvector4f Normal; |
| GLvector4f Color; |
| GLvector4f SecondaryColor; |
| GLvector4f FogCoord; |
| GLvector4f TexCoord[MAX_TEXTURE_COORD_UNITS]; |
| GLvector4f Index; |
| |
| GLubyte *EdgeFlag; |
| GLuint *Elt; |
| |
| /* These attributes don't alias with the conventional attributes. |
| * The GL_NV_vertex_program extension defines 16 extra sets of vertex |
| * arrays which have precedent over the conventional arrays when enabled. |
| */ |
| GLvector4f Attribs[_TNL_ATTRIB_MAX]; |
| }; |
| |
| |
| /** |
| * Contains the current state of a running pipeline. |
| */ |
| struct vertex_buffer |
| { |
| /* Constant over life of the vertex_buffer. |
| */ |
| GLuint Size; |
| |
| /* Constant over the pipeline. |
| */ |
| GLuint Count; /* for everything except Elts */ |
| |
| /* Pointers to current data. |
| */ |
| GLuint *Elts; |
| GLvector4f *ObjPtr; /* _TNL_BIT_POS */ |
| GLvector4f *EyePtr; /* _TNL_BIT_POS */ |
| GLvector4f *ClipPtr; /* _TNL_BIT_POS */ |
| GLvector4f *NdcPtr; /* _TNL_BIT_POS */ |
| GLubyte ClipOrMask; /* _TNL_BIT_POS */ |
| GLubyte *ClipMask; /* _TNL_BIT_POS */ |
| GLvector4f *NormalPtr; /* _TNL_BIT_NORMAL */ |
| GLfloat *NormalLengthPtr; /* _TNL_BIT_NORMAL */ |
| GLboolean *EdgeFlag; /* _TNL_BIT_EDGEFLAG */ |
| GLvector4f *TexCoordPtr[MAX_TEXTURE_COORD_UNITS]; /* VERT_TEX_0..n */ |
| GLvector4f *IndexPtr[2]; /* _TNL_BIT_INDEX */ |
| GLvector4f *ColorPtr[2]; /* _TNL_BIT_COLOR0 */ |
| GLvector4f *SecondaryColorPtr[2]; /* _TNL_BIT_COLOR1 */ |
| GLvector4f *PointSizePtr; /* _TNL_BIT_POS */ |
| GLvector4f *FogCoordPtr; /* _TNL_BIT_FOG */ |
| |
| struct tnl_prim *Primitive; |
| GLuint PrimitiveCount; |
| |
| /* Inputs to the vertex program stage */ |
| GLvector4f *AttribPtr[_TNL_ATTRIB_MAX]; /* GL_NV_vertex_program */ |
| |
| GLuint LastClipped; |
| /* Private data from _tnl_render_stage that has no business being |
| * in this struct. |
| */ |
| }; |
| |
| |
| /** Describes an individual operation on the pipeline. |
| */ |
| struct tnl_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 tnl_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 tnl_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 tnl_pipeline_stage * ); |
| }; |
| |
| /** Contains the array of all pipeline stages. |
| * The default values are defined at the end of t_pipeline.c */ |
| struct tnl_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 */ |
| /** This array has to end with a NULL-pointer. */ |
| struct tnl_pipeline_stage stages[MAX_PIPELINE_STAGES+1]; |
| GLuint nr_stages; |
| }; |
| |
| struct tnl_clipspace_attr; |
| |
| typedef void (*extract_func)( const struct tnl_clipspace_attr *a, GLfloat *out, |
| const GLubyte *v ); |
| |
| typedef void (*insert_func)( const struct tnl_clipspace_attr *a, GLubyte *v, |
| const GLfloat *in ); |
| |
| |
| /** |
| * Describes how to convert/move a vertex attribute from a vertex array |
| * to a vertex structure. |
| */ |
| struct tnl_clipspace_attr |
| { |
| GLuint attrib; /* which vertex attrib (0=position, etc) */ |
| GLuint vertoffset; /* position of the attrib in the vertex struct */ |
| GLuint vertattrsize; /* size of the attribute in bytes */ |
| GLubyte *inputptr; |
| GLuint inputstride; |
| insert_func *insert; |
| insert_func emit; |
| extract_func extract; |
| const GLfloat *vp; /* NDC->Viewport mapping matrix */ |
| }; |
| |
| |
| |
| 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); |
| |
| |
| /** |
| * Used to describe conversion of vertex arrays to vertex structures. |
| * I.e. Structure of arrays to arrays of structs. |
| */ |
| struct tnl_clipspace |
| { |
| GLboolean need_extras; |
| |
| GLuint new_inputs; |
| |
| GLubyte *vertex_buf; |
| GLuint vertex_size; |
| GLuint max_vertex_size; |
| |
| struct tnl_clipspace_attr attr[_TNL_ATTRIB_MAX]; |
| GLuint attr_count; |
| |
| void (*emit)( GLcontext *ctx, GLuint start, GLuint end, void *dest ); |
| interp_func interp; |
| copy_pv_func copy_pv; |
| }; |
| |
| |
| 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; |
| }; |
| |
| |
| /** |
| * Context state for T&L context. |
| */ |
| typedef struct |
| { |
| /* Driver interface. |
| */ |
| struct tnl_device_driver Driver; |
| |
| /* Execute: |
| */ |
| struct tnl_vtx vtx; |
| |
| /* Compile: |
| */ |
| struct tnl_save save; |
| |
| /* Pipeline |
| */ |
| struct tnl_pipeline pipeline; |
| struct vertex_buffer vb; |
| |
| /* GLvectors for binding to vb: |
| */ |
| struct tnl_vertex_arrays vtx_inputs; |
| struct tnl_vertex_arrays save_inputs; |
| struct tnl_vertex_arrays current; |
| struct tnl_vertex_arrays array_inputs; |
| |
| /* Clipspace/ndc/window vertex managment: |
| */ |
| struct tnl_clipspace clipspace; |
| |
| /* Probably need a better configuration mechanism: |
| */ |
| GLboolean NeedNdcCoords; |
| GLboolean LoopbackDListCassettes; |
| GLboolean CalcDListNormalLengths; |
| GLboolean IsolateMaterials; |
| GLboolean AllowVertexFog; |
| GLboolean AllowPixelFog; |
| GLboolean AllowCodegen; |
| |
| GLboolean _DoVertexFog; /* eval fog function at each vertex? */ |
| |
| GLuint render_inputs; |
| |
| GLvertexformat exec_vtxfmt; |
| GLvertexformat save_vtxfmt; |
| |
| } TNLcontext; |
| |
| |
| |
| #define TNL_CONTEXT(ctx) ((TNLcontext *)(ctx->swtnl_context)) |
| |
| |
| #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 ); |
| |
| |
| |
| |
| #endif |