diff options
Diffstat (limited to 'mesalib/src/mesa/tnl/t_context.h')
| -rw-r--r-- | mesalib/src/mesa/tnl/t_context.h | 551 |
1 files changed, 551 insertions, 0 deletions
diff --git a/mesalib/src/mesa/tnl/t_context.h b/mesalib/src/mesa/tnl/t_context.h new file mode 100644 index 000000000..c19eb3df3 --- /dev/null +++ b/mesalib/src/mesa/tnl/t_context.h @@ -0,0 +1,551 @@ +/* + * mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 1999-2006 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. + * + */ + + +#ifndef _T_CONTEXT_H +#define _T_CONTEXT_H + +#include "main/glheader.h" +#include "main/bitset.h" +#include "main/mtypes.h" + +#include "math/m_matrix.h" +#include "math/m_vector.h" +#include "math/m_xform.h" + +#include "vbo/vbo.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. + */ +/* Although it's nice to use these as bit indexes in a DWORD flag, we + * could manage without if necessary. Another limit currently is the + * number of bits allocated for these numbers in places like vertex + * program instruction formats and register layouts. + */ +/* The bit space exhaustion is a fact now, done by _TNL_ATTRIB_ATTRIBUTE* for + * GLSL vertex shader which cannot be aliased with conventional vertex attribs. + * Compacting _TNL_ATTRIB_MAT_* attribs would not work, they would not give + * as many free bits (11 plus already 1 free bit) as _TNL_ATTRIB_ATTRIBUTE* + * attribs want (16). + */ +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_COLOR_INDEX = 6, + _TNL_ATTRIB_EDGEFLAG = 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_GENERIC0 = 16, /* doesn't really exist! */ + _TNL_ATTRIB_GENERIC1 = 17, + _TNL_ATTRIB_GENERIC2 = 18, + _TNL_ATTRIB_GENERIC3 = 19, + _TNL_ATTRIB_GENERIC4 = 20, + _TNL_ATTRIB_GENERIC5 = 21, + _TNL_ATTRIB_GENERIC6 = 22, + _TNL_ATTRIB_GENERIC7 = 23, + _TNL_ATTRIB_GENERIC8 = 24, + _TNL_ATTRIB_GENERIC9 = 25, + _TNL_ATTRIB_GENERIC10 = 26, + _TNL_ATTRIB_GENERIC11 = 27, + _TNL_ATTRIB_GENERIC12 = 28, + _TNL_ATTRIB_GENERIC13 = 29, + _TNL_ATTRIB_GENERIC14 = 30, + _TNL_ATTRIB_GENERIC15 = 31, + + /* These alias with the generics, but they are not active + * concurrently, so it's not a problem. The TNL module + * doesn't have to do anything about this as this is how they + * are passed into the _draw_prims callback. + * + * When we generate fixed-function replacement programs (in + * t_vp_build.c currently), they refer to the appropriate + * generic attribute in order to pick up per-vertex material + * data. + */ + _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, + + /* This is really a VERT_RESULT, not an attrib. Need to fix + * tnl to understand the difference. + */ + _TNL_ATTRIB_POINTSIZE = 16, + + _TNL_ATTRIB_MAX = 32 +} ; + +#define _TNL_ATTRIB_TEX(u) (_TNL_ATTRIB_TEX0 + (u)) +#define _TNL_ATTRIB_GENERIC(n) (_TNL_ATTRIB_GENERIC0 + (n)) + +/* special index used for handing invalid glVertexAttribute() indices */ +#define _TNL_ATTRIB_ERROR (_TNL_ATTRIB_GENERIC15 + 1) + +/** + * Handy attribute ranges: + */ +#define _TNL_FIRST_PROG _TNL_ATTRIB_WEIGHT +#define _TNL_LAST_PROG _TNL_ATTRIB_TEX7 + +#define _TNL_FIRST_TEX _TNL_ATTRIB_TEX0 +#define _TNL_LAST_TEX _TNL_ATTRIB_TEX7 + +#define _TNL_FIRST_GENERIC _TNL_ATTRIB_GENERIC0 +#define _TNL_LAST_GENERIC _TNL_ATTRIB_GENERIC15 + +#define _TNL_FIRST_MAT _TNL_ATTRIB_MAT_FRONT_AMBIENT /* GENERIC0 */ +#define _TNL_LAST_MAT _TNL_ATTRIB_MAT_BACK_INDEXES /* GENERIC11 */ + +/* Number of available generic attributes */ +#define _TNL_NUM_GENERIC 16 + +/* Number of attributes used for evaluators */ +#define _TNL_NUM_EVAL 16 + + +#define PRIM_BEGIN 0x10 +#define PRIM_END 0x20 +#define PRIM_MODE_MASK 0x0f + +static INLINE GLuint _tnl_translate_prim( const struct _mesa_prim *prim ) +{ + GLuint flag; + flag = prim->mode; + if (prim->begin) flag |= PRIM_BEGIN; + if (prim->end) flag |= PRIM_END; + return flag; +} + + + + +/** + * Contains the current state of a running pipeline. + */ +struct vertex_buffer +{ + GLuint Size; /**< Max vertices per vertex buffer, constant */ + + /* Constant over the pipeline. + */ + GLuint Count; /**< Number of vertices currently in buffer */ + + /* Pointers to current data. + * XXX some of these fields alias AttribPtr below and should be removed + * such as NormalPtr, TexCoordPtr, FogCoordPtr, etc. + */ + 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 ClipAndMask; /* _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 *FogCoordPtr; /* _TNL_BIT_FOG */ + + const struct _mesa_prim *Primitive; + GLuint PrimitiveCount; + + /* Inputs to the vertex program stage */ + GLvector4f *AttribPtr[_TNL_ATTRIB_MAX]; /* GL_NV_vertex_program */ +}; + + +/** + * Describes an individual operation on the pipeline. + */ +struct tnl_pipeline_stage +{ + const char *name; + + /* Private data for the pipeline stage: + */ + void *privatePtr; + + /* Allocate private data + */ + GLboolean (*create)( GLcontext *ctx, struct tnl_pipeline_stage * ); + + /* Free private data. + */ + void (*destroy)( struct tnl_pipeline_stage * ); + + /* Called on any statechange or input array size change or + * input array change to/from zero stride. + */ + void (*validate)( 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 last_attrib_stride[_TNL_ATTRIB_MAX]; + GLuint last_attrib_size[_TNL_ATTRIB_MAX]; + GLuint input_changes; + GLuint new_state; + + struct tnl_pipeline_stage stages[MAX_PIPELINE_STAGES+1]; + GLuint nr_stages; +}; + +struct tnl_clipspace; +struct tnl_clipspace_attr; + +typedef void (*tnl_extract_func)( const struct tnl_clipspace_attr *a, + GLfloat *out, + const GLubyte *v ); + +typedef void (*tnl_insert_func)( const struct tnl_clipspace_attr *a, + GLubyte *v, + const GLfloat *in ); + +typedef void (*tnl_emit_func)( GLcontext *ctx, + GLuint count, + GLubyte *dest ); + + +/** + * 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 format; + GLuint vertoffset; /* position of the attrib in the vertex struct */ + GLuint vertattrsize; /* size of the attribute in bytes */ + GLubyte *inputptr; + GLuint inputstride; + GLuint inputsize; + const tnl_insert_func *insert; + tnl_insert_func emit; + tnl_extract_func extract; + const GLfloat *vp; /* NDC->Viewport mapping matrix */ +}; + + + + +typedef void (*tnl_points_func)( GLcontext *ctx, GLuint first, GLuint last ); +typedef void (*tnl_line_func)( GLcontext *ctx, GLuint v1, GLuint v2 ); +typedef void (*tnl_triangle_func)( GLcontext *ctx, + GLuint v1, GLuint v2, GLuint v3 ); +typedef void (*tnl_quad_func)( GLcontext *ctx, GLuint v1, GLuint v2, + GLuint v3, GLuint v4 ); +typedef void (*tnl_render_func)( GLcontext *ctx, GLuint start, GLuint count, + GLuint flags ); +typedef void (*tnl_interp_func)( GLcontext *ctx, + GLfloat t, GLuint dst, GLuint out, GLuint in, + GLboolean force_boundary ); +typedef void (*tnl_copy_pv_func)( GLcontext *ctx, GLuint dst, GLuint src ); +typedef void (*tnl_setup_func)( GLcontext *ctx, + GLuint start, GLuint end, + GLuint new_inputs); + + +struct tnl_attr_type { + GLuint format; + GLuint size; + GLuint stride; + GLuint offset; +}; + +struct tnl_clipspace_fastpath { + GLuint vertex_size; + GLuint attr_count; + GLboolean match_strides; + + struct tnl_attr_type *attr; + + tnl_emit_func func; + struct tnl_clipspace_fastpath *next; +}; + +/** + * 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; + + tnl_emit_func emit; + tnl_interp_func interp; + tnl_copy_pv_func copy_pv; + + /* Parameters and constants for codegen: + */ + GLboolean need_viewport; + GLfloat vp_scale[4]; + GLfloat vp_xlate[4]; + GLfloat chan_scale[4]; + GLfloat identity[4]; + + struct tnl_clipspace_fastpath *fastpath; + + void (*codegen_emit)( GLcontext *ctx ); +}; + + +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. + */ + + void (*NotifyInputChanges)(GLcontext *ctx, GLuint bitmask); + /* Alert tnl-aware drivers of changes to size and stride of input + * arrays. + */ + + /*** + *** 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(). + */ + + tnl_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. + */ + + tnl_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. */ + + tnl_points_func Points; /* must now respect vb->elts */ + tnl_line_func Line; + tnl_triangle_func Triangle; + tnl_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. + */ + + tnl_render_func *PrimTabVerts; + tnl_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. + */ + + tnl_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; +}; + + +#define DECLARE_RENDERINPUTS(name) BITSET64_DECLARE(name, _TNL_ATTRIB_MAX) +#define RENDERINPUTS_COPY BITSET64_COPY +#define RENDERINPUTS_EQUAL BITSET64_EQUAL +#define RENDERINPUTS_ZERO BITSET64_ZERO +#define RENDERINPUTS_ONES BITSET64_ONES +#define RENDERINPUTS_TEST BITSET64_TEST +#define RENDERINPUTS_SET BITSET64_SET +#define RENDERINPUTS_CLEAR BITSET64_CLEAR +#define RENDERINPUTS_TEST_RANGE BITSET64_TEST_RANGE +#define RENDERINPUTS_SET_RANGE BITSET64_SET_RANGE +#define RENDERINPUTS_CLEAR_RANGE BITSET64_CLEAR_RANGE + + +/** + * Context state for T&L context. + */ +typedef struct +{ + /* Driver interface. + */ + struct tnl_device_driver Driver; + + /* Pipeline + */ + struct tnl_pipeline pipeline; + struct vertex_buffer vb; + + /* Clipspace/ndc/window vertex managment: + */ + struct tnl_clipspace clipspace; + + /* Probably need a better configuration mechanism: + */ + GLboolean NeedNdcCoords; + GLboolean AllowVertexFog; + GLboolean AllowPixelFog; + GLboolean _DoVertexFog; /* eval fog function at each vertex? */ + + DECLARE_RENDERINPUTS(render_inputs_bitset); + + GLvector4f tmp_inputs[VERT_ATTRIB_MAX]; + + /* Temp storage for t_draw.c: + */ + GLubyte *block[VERT_ATTRIB_MAX]; + GLuint nr_blocks; + +} 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 */ + + +#endif |