From 528f5bd58a139174170c4130c67dca30193c9057 Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 5 Dec 2011 07:42:31 +0100 Subject: xserver xkeyboard-config mesa git update 5 dec 2011 --- mesalib/src/mesa/tnl/t_context.h | 1093 +++++++++++++++++------------------ mesalib/src/mesa/tnl/t_vb_cliptmp.h | 640 ++++++++++---------- 2 files changed, 866 insertions(+), 867 deletions(-) (limited to 'mesalib/src/mesa/tnl') diff --git a/mesalib/src/mesa/tnl/t_context.h b/mesalib/src/mesa/tnl/t_context.h index 9fd5c99bb..36b104354 100644 --- a/mesalib/src/mesa/tnl/t_context.h +++ b/mesalib/src/mesa/tnl/t_context.h @@ -1,547 +1,546 @@ -/* - * 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_vector.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. Most of the data is in AttribPtr -- all of - * it that is one of VERT_ATTRIB_X. For things only produced by TNL, - * such as backface color or eye-space coordinates, they are stored - * here. - */ - GLuint *Elts; - 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 */ - GLfloat *NormalLengthPtr; /* _TNL_BIT_NORMAL */ - GLboolean *EdgeFlag; /* _TNL_BIT_EDGEFLAG */ - GLvector4f *BackfaceIndexPtr; - GLvector4f *BackfaceColorPtr; - GLvector4f *BackfaceSecondaryColorPtr; - - 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)( struct gl_context *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)( struct gl_context *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)( struct gl_context *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)( struct gl_context *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)( struct gl_context *ctx, GLuint first, GLuint last ); -typedef void (*tnl_line_func)( struct gl_context *ctx, GLuint v1, GLuint v2 ); -typedef void (*tnl_triangle_func)( struct gl_context *ctx, - GLuint v1, GLuint v2, GLuint v3 ); -typedef void (*tnl_quad_func)( struct gl_context *ctx, GLuint v1, GLuint v2, - GLuint v3, GLuint v4 ); -typedef void (*tnl_render_func)( struct gl_context *ctx, GLuint start, GLuint count, - GLuint flags ); -typedef void (*tnl_interp_func)( struct gl_context *ctx, - GLfloat t, GLuint dst, GLuint out, GLuint in, - GLboolean force_boundary ); -typedef void (*tnl_copy_pv_func)( struct gl_context *ctx, GLuint dst, GLuint src ); -typedef void (*tnl_setup_func)( struct gl_context *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)( struct gl_context *ctx ); -}; - - -struct tnl_device_driver -{ - /*** - *** TNL Pipeline - ***/ - - void (*RunPipeline)(struct gl_context *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)(struct gl_context *ctx); - /* Alert tnl-aware drivers of changes to material. - */ - - /*** - *** Rendering -- These functions called only from t_vb_render.c - ***/ - struct - { - void (*Start)(struct gl_context *ctx); - void (*Finish)(struct gl_context *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)(struct gl_context *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)( struct gl_context *ctx, const GLuint *elts, GLuint n ); - /* Render a polygon with vertices whose indexes are in the - * array. - */ - - void (*ClippedLine)( struct gl_context *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)( struct gl_context *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)( struct gl_context *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; - - GLuint CurInstance; - -} 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_clip_prepare(struct gl_context *ctx); - - -#endif +/* + * 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_vector.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 = 17, /* doesn't really exist! */ + _TNL_ATTRIB_GENERIC1 = 18, + _TNL_ATTRIB_GENERIC2 = 19, + _TNL_ATTRIB_GENERIC3 = 20, + _TNL_ATTRIB_GENERIC4 = 21, + _TNL_ATTRIB_GENERIC5 = 22, + _TNL_ATTRIB_GENERIC6 = 23, + _TNL_ATTRIB_GENERIC7 = 24, + _TNL_ATTRIB_GENERIC8 = 25, + _TNL_ATTRIB_GENERIC9 = 26, + _TNL_ATTRIB_GENERIC10 = 27, + _TNL_ATTRIB_GENERIC11 = 28, + _TNL_ATTRIB_GENERIC12 = 29, + _TNL_ATTRIB_GENERIC13 = 30, + _TNL_ATTRIB_GENERIC14 = 31, + _TNL_ATTRIB_GENERIC15 = 32, + + /* 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 = 17, + _TNL_ATTRIB_MAT_BACK_AMBIENT = 18, + _TNL_ATTRIB_MAT_FRONT_DIFFUSE = 19, + _TNL_ATTRIB_MAT_BACK_DIFFUSE = 20, + _TNL_ATTRIB_MAT_FRONT_SPECULAR = 21, + _TNL_ATTRIB_MAT_BACK_SPECULAR = 22, + _TNL_ATTRIB_MAT_FRONT_EMISSION = 23, + _TNL_ATTRIB_MAT_BACK_EMISSION = 24, + _TNL_ATTRIB_MAT_FRONT_SHININESS = 25, + _TNL_ATTRIB_MAT_BACK_SHININESS = 26, + _TNL_ATTRIB_MAT_FRONT_INDEXES = 27, + _TNL_ATTRIB_MAT_BACK_INDEXES = 28, + + /* This is really a VERT_RESULT, not an attrib. Need to fix + * tnl to understand the difference. + */ + _TNL_ATTRIB_POINTSIZE = 16, + + _TNL_ATTRIB_MAX = 33 +} ; + +#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. Most of the data is in AttribPtr -- all of + * it that is one of VERT_ATTRIB_X. For things only produced by TNL, + * such as backface color or eye-space coordinates, they are stored + * here. + */ + GLuint *Elts; + 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 */ + GLfloat *NormalLengthPtr; /* _TNL_BIT_NORMAL */ + GLboolean *EdgeFlag; /* _TNL_BIT_EDGEFLAG */ + GLvector4f *BackfaceIndexPtr; + GLvector4f *BackfaceColorPtr; + GLvector4f *BackfaceSecondaryColorPtr; + + 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)( struct gl_context *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)( struct gl_context *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)( struct gl_context *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)( struct gl_context *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)( struct gl_context *ctx, GLuint first, GLuint last ); +typedef void (*tnl_line_func)( struct gl_context *ctx, GLuint v1, GLuint v2 ); +typedef void (*tnl_triangle_func)( struct gl_context *ctx, + GLuint v1, GLuint v2, GLuint v3 ); +typedef void (*tnl_quad_func)( struct gl_context *ctx, GLuint v1, GLuint v2, + GLuint v3, GLuint v4 ); +typedef void (*tnl_render_func)( struct gl_context *ctx, GLuint start, GLuint count, + GLuint flags ); +typedef void (*tnl_interp_func)( struct gl_context *ctx, + GLfloat t, GLuint dst, GLuint out, GLuint in, + GLboolean force_boundary ); +typedef void (*tnl_copy_pv_func)( struct gl_context *ctx, GLuint dst, GLuint src ); +typedef void (*tnl_setup_func)( struct gl_context *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)( struct gl_context *ctx ); +}; + + +struct tnl_device_driver +{ + /*** + *** TNL Pipeline + ***/ + + void (*RunPipeline)(struct gl_context *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)(struct gl_context *ctx); + /* Alert tnl-aware drivers of changes to material. + */ + + /*** + *** Rendering -- These functions called only from t_vb_render.c + ***/ + struct + { + void (*Start)(struct gl_context *ctx); + void (*Finish)(struct gl_context *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)(struct gl_context *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)( struct gl_context *ctx, const GLuint *elts, GLuint n ); + /* Render a polygon with vertices whose indexes are in the + * array. + */ + + void (*ClippedLine)( struct gl_context *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)( struct gl_context *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)( struct gl_context *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; + + GLuint CurInstance; +} 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_clip_prepare(struct gl_context *ctx); + + +#endif diff --git a/mesalib/src/mesa/tnl/t_vb_cliptmp.h b/mesalib/src/mesa/tnl/t_vb_cliptmp.h index b67aaddda..0b45bc534 100644 --- a/mesalib/src/mesa/tnl/t_vb_cliptmp.h +++ b/mesalib/src/mesa/tnl/t_vb_cliptmp.h @@ -1,320 +1,320 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5.2 - * - * 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. - * - * Authors: - * Keith Whitwell - */ - - -#define CLIP_DOTPROD(K, A, B, C, D) X(K)*A + Y(K)*B + Z(K)*C + W(K)*D - -#define POLY_CLIP( PLANE_BIT, A, B, C, D ) \ -do { \ - if (mask & PLANE_BIT) { \ - GLuint idxPrev = inlist[0]; \ - GLfloat dpPrev = CLIP_DOTPROD(idxPrev, A, B, C, D ); \ - GLuint outcount = 0; \ - GLuint i; \ - \ - inlist[n] = inlist[0]; /* prevent rotation of vertices */ \ - for (i = 1; i <= n; i++) { \ - GLuint idx = inlist[i]; \ - GLfloat dp = CLIP_DOTPROD(idx, A, B, C, D ); \ - \ - if (!IS_NEGATIVE(dpPrev)) { \ - outlist[outcount++] = idxPrev; \ - } \ - \ - if (DIFFERENT_SIGNS(dp, dpPrev)) { \ - if (IS_NEGATIVE(dp)) { \ - /* Going out of bounds. Avoid division by zero as we \ - * know dp != dpPrev from DIFFERENT_SIGNS, above. \ - */ \ - GLfloat t = dp / (dp - dpPrev); \ - INTERP_4F( t, coord[newvert], coord[idx], coord[idxPrev]); \ - interp( ctx, t, newvert, idx, idxPrev, GL_TRUE ); \ - } else { \ - /* Coming back in. \ - */ \ - GLfloat t = dpPrev / (dpPrev - dp); \ - INTERP_4F( t, coord[newvert], coord[idxPrev], coord[idx]); \ - interp( ctx, t, newvert, idxPrev, idx, GL_FALSE ); \ - } \ - outlist[outcount++] = newvert++; \ - } \ - \ - idxPrev = idx; \ - dpPrev = dp; \ - } \ - \ - if (outcount < 3) \ - return; \ - \ - { \ - GLuint *tmp = inlist; \ - inlist = outlist; \ - outlist = tmp; \ - n = outcount; \ - } \ - } \ -} while (0) - - -#define LINE_CLIP(PLANE_BIT, A, B, C, D ) \ -do { \ - if (mask & PLANE_BIT) { \ - const GLfloat dp0 = CLIP_DOTPROD( v0, A, B, C, D ); \ - const GLfloat dp1 = CLIP_DOTPROD( v1, A, B, C, D ); \ - const GLboolean neg_dp0 = IS_NEGATIVE(dp0); \ - const GLboolean neg_dp1 = IS_NEGATIVE(dp1); \ - \ - /* For regular clipping, we know from the clipmask that one \ - * (or both) of these must be negative (otherwise we wouldn't \ - * be here). \ - * For userclip, there is only a single bit for all active \ - * planes, so we can end up here when there is nothing to do, \ - * hence the second IS_NEGATIVE() test: \ - */ \ - if (neg_dp0 && neg_dp1) \ - return; /* both vertices outside clip plane: discard */ \ - \ - if (neg_dp1) { \ - GLfloat t = dp1 / (dp1 - dp0); \ - if (t > t1) t1 = t; \ - } else if (neg_dp0) { \ - GLfloat t = dp0 / (dp0 - dp1); \ - if (t > t0) t0 = t; \ - } \ - if (t0 + t1 >= 1.0) \ - return; /* discard */ \ - } \ -} while (0) - - - -/* Clip a line against the viewport and user clip planes. - */ -static INLINE void -TAG(clip_line)( struct gl_context *ctx, GLuint v0, GLuint v1, GLubyte mask ) -{ - TNLcontext *tnl = TNL_CONTEXT(ctx); - struct vertex_buffer *VB = &tnl->vb; - tnl_interp_func interp = tnl->Driver.Render.Interp; - GLfloat (*coord)[4] = VB->ClipPtr->data; - GLuint newvert = VB->Count; - GLfloat t0 = 0; - GLfloat t1 = 0; - GLuint p; - const GLuint v0_orig = v0; - - if (mask & CLIP_FRUSTUM_BITS) { - LINE_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 ); - LINE_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 ); - LINE_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 ); - LINE_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 ); - LINE_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 ); - LINE_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 ); - } - - if (mask & CLIP_USER_BIT) { - for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { - if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - const GLfloat a = ctx->Transform._ClipUserPlane[p][0]; - const GLfloat b = ctx->Transform._ClipUserPlane[p][1]; - const GLfloat c = ctx->Transform._ClipUserPlane[p][2]; - const GLfloat d = ctx->Transform._ClipUserPlane[p][3]; - LINE_CLIP( CLIP_USER_BIT, a, b, c, d ); - } - } - } - - if (VB->ClipMask[v0]) { - INTERP_4F( t0, coord[newvert], coord[v0], coord[v1] ); - interp( ctx, t0, newvert, v0, v1, GL_FALSE ); - v0 = newvert; - newvert++; - } - else { - ASSERT(t0 == 0.0); - } - - /* Note: we need to use vertex v0_orig when computing the new - * interpolated/clipped vertex position, not the current v0 which - * may have got set when we clipped the other end of the line! - */ - if (VB->ClipMask[v1]) { - INTERP_4F( t1, coord[newvert], coord[v1], coord[v0_orig] ); - interp( ctx, t1, newvert, v1, v0_orig, GL_FALSE ); - - if (ctx->Light.ShadeModel == GL_FLAT) - tnl->Driver.Render.CopyPV( ctx, newvert, v1 ); - - v1 = newvert; - - newvert++; - } - else { - ASSERT(t1 == 0.0); - } - - tnl->Driver.Render.ClippedLine( ctx, v0, v1 ); -} - - -/* Clip a triangle against the viewport and user clip planes. - */ -static INLINE void -TAG(clip_tri)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask ) -{ - TNLcontext *tnl = TNL_CONTEXT(ctx); - struct vertex_buffer *VB = &tnl->vb; - tnl_interp_func interp = tnl->Driver.Render.Interp; - GLuint newvert = VB->Count; - GLfloat (*coord)[4] = VB->ClipPtr->data; - GLuint pv = v2; - GLuint vlist[2][MAX_CLIPPED_VERTICES]; - GLuint *inlist = vlist[0], *outlist = vlist[1]; - GLuint p; - GLuint n = 3; - - ASSIGN_3V(inlist, v2, v0, v1 ); /* pv rotated to slot zero */ - - if (0) { - /* print pre-clip vertex coords */ - GLuint i, j; - printf("pre clip:\n"); - for (i = 0; i < n; i++) { - j = inlist[i]; - printf(" %u: %u: %f, %f, %f, %f\n", - i, j, - coord[j][0], coord[j][1], coord[j][2], coord[j][3]); - assert(!IS_INF_OR_NAN(coord[j][0])); - assert(!IS_INF_OR_NAN(coord[j][1])); - assert(!IS_INF_OR_NAN(coord[j][2])); - assert(!IS_INF_OR_NAN(coord[j][3])); - } - } - - - if (mask & CLIP_FRUSTUM_BITS) { - POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 ); - POLY_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 ); - POLY_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 ); - POLY_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 ); - POLY_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 ); - POLY_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 ); - } - - if (mask & CLIP_USER_BIT) { - for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { - if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - const GLfloat a = ctx->Transform._ClipUserPlane[p][0]; - const GLfloat b = ctx->Transform._ClipUserPlane[p][1]; - const GLfloat c = ctx->Transform._ClipUserPlane[p][2]; - const GLfloat d = ctx->Transform._ClipUserPlane[p][3]; - POLY_CLIP( CLIP_USER_BIT, a, b, c, d ); - } - } - } - - if (ctx->Light.ShadeModel == GL_FLAT) { - if (pv != inlist[0]) { - ASSERT( inlist[0] >= VB->Count ); - tnl->Driver.Render.CopyPV( ctx, inlist[0], pv ); - } - } - - if (0) { - /* print post-clip vertex coords */ - GLuint i, j; - printf("post clip:\n"); - for (i = 0; i < n; i++) { - j = inlist[i]; - printf(" %u: %u: %f, %f, %f, %f\n", - i, j, - coord[j][0], coord[j][1], coord[j][2], coord[j][3]); - } - } - - tnl->Driver.Render.ClippedPolygon( ctx, inlist, n ); -} - - -/* Clip a quad against the viewport and user clip planes. - */ -static INLINE void -TAG(clip_quad)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3, - GLubyte mask ) -{ - TNLcontext *tnl = TNL_CONTEXT(ctx); - struct vertex_buffer *VB = &tnl->vb; - tnl_interp_func interp = tnl->Driver.Render.Interp; - GLuint newvert = VB->Count; - GLfloat (*coord)[4] = VB->ClipPtr->data; - GLuint pv = v3; - GLuint vlist[2][MAX_CLIPPED_VERTICES]; - GLuint *inlist = vlist[0], *outlist = vlist[1]; - GLuint p; - GLuint n = 4; - - ASSIGN_4V(inlist, v3, v0, v1, v2 ); /* pv rotated to slot zero */ - - if (mask & CLIP_FRUSTUM_BITS) { - POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 ); - POLY_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 ); - POLY_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 ); - POLY_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 ); - POLY_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 ); - POLY_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 ); - } - - if (mask & CLIP_USER_BIT) { - for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { - if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - const GLfloat a = ctx->Transform._ClipUserPlane[p][0]; - const GLfloat b = ctx->Transform._ClipUserPlane[p][1]; - const GLfloat c = ctx->Transform._ClipUserPlane[p][2]; - const GLfloat d = ctx->Transform._ClipUserPlane[p][3]; - POLY_CLIP( CLIP_USER_BIT, a, b, c, d ); - } - } - } - - if (ctx->Light.ShadeModel == GL_FLAT) { - if (pv != inlist[0]) { - ASSERT( inlist[0] >= VB->Count ); - tnl->Driver.Render.CopyPV( ctx, inlist[0], pv ); - } - } - - tnl->Driver.Render.ClippedPolygon( ctx, inlist, n ); -} - -#undef W -#undef Z -#undef Y -#undef X -#undef SIZE -#undef TAG -#undef POLY_CLIP -#undef LINE_CLIP +/* + * Mesa 3-D graphics library + * Version: 6.5.2 + * + * 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. + * + * Authors: + * Keith Whitwell + */ + + +#define CLIP_DOTPROD(K, A, B, C, D) X(K)*A + Y(K)*B + Z(K)*C + W(K)*D + +#define POLY_CLIP( PLANE_BIT, A, B, C, D ) \ +do { \ + if (mask & PLANE_BIT) { \ + GLuint idxPrev = inlist[0]; \ + GLfloat dpPrev = CLIP_DOTPROD(idxPrev, A, B, C, D ); \ + GLuint outcount = 0; \ + GLuint i; \ + \ + inlist[n] = inlist[0]; /* prevent rotation of vertices */ \ + for (i = 1; i <= n; i++) { \ + GLuint idx = inlist[i]; \ + GLfloat dp = CLIP_DOTPROD(idx, A, B, C, D ); \ + \ + if (!IS_NEGATIVE(dpPrev)) { \ + outlist[outcount++] = idxPrev; \ + } \ + \ + if (DIFFERENT_SIGNS(dp, dpPrev)) { \ + if (IS_NEGATIVE(dp)) { \ + /* Going out of bounds. Avoid division by zero as we \ + * know dp != dpPrev from DIFFERENT_SIGNS, above. \ + */ \ + GLfloat t = dp / (dp - dpPrev); \ + INTERP_4F( t, coord[newvert], coord[idx], coord[idxPrev]); \ + interp( ctx, t, newvert, idx, idxPrev, GL_TRUE ); \ + } else { \ + /* Coming back in. \ + */ \ + GLfloat t = dpPrev / (dpPrev - dp); \ + INTERP_4F( t, coord[newvert], coord[idxPrev], coord[idx]); \ + interp( ctx, t, newvert, idxPrev, idx, GL_FALSE ); \ + } \ + outlist[outcount++] = newvert++; \ + } \ + \ + idxPrev = idx; \ + dpPrev = dp; \ + } \ + \ + if (outcount < 3) \ + return; \ + \ + { \ + GLuint *tmp = inlist; \ + inlist = outlist; \ + outlist = tmp; \ + n = outcount; \ + } \ + } \ +} while (0) + + +#define LINE_CLIP(PLANE_BIT, A, B, C, D ) \ +do { \ + if (mask & PLANE_BIT) { \ + const GLfloat dp0 = CLIP_DOTPROD( v0, A, B, C, D ); \ + const GLfloat dp1 = CLIP_DOTPROD( v1, A, B, C, D ); \ + const GLboolean neg_dp0 = IS_NEGATIVE(dp0); \ + const GLboolean neg_dp1 = IS_NEGATIVE(dp1); \ + \ + /* For regular clipping, we know from the clipmask that one \ + * (or both) of these must be negative (otherwise we wouldn't \ + * be here). \ + * For userclip, there is only a single bit for all active \ + * planes, so we can end up here when there is nothing to do, \ + * hence the second IS_NEGATIVE() test: \ + */ \ + if (neg_dp0 && neg_dp1) \ + return; /* both vertices outside clip plane: discard */ \ + \ + if (neg_dp1) { \ + GLfloat t = dp1 / (dp1 - dp0); \ + if (t > t1) t1 = t; \ + } else if (neg_dp0) { \ + GLfloat t = dp0 / (dp0 - dp1); \ + if (t > t0) t0 = t; \ + } \ + if (t0 + t1 >= 1.0) \ + return; /* discard */ \ + } \ +} while (0) + + + +/* Clip a line against the viewport and user clip planes. + */ +static inline void +TAG(clip_line)( struct gl_context *ctx, GLuint v0, GLuint v1, GLubyte mask ) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct vertex_buffer *VB = &tnl->vb; + tnl_interp_func interp = tnl->Driver.Render.Interp; + GLfloat (*coord)[4] = VB->ClipPtr->data; + GLuint newvert = VB->Count; + GLfloat t0 = 0; + GLfloat t1 = 0; + GLuint p; + const GLuint v0_orig = v0; + + if (mask & CLIP_FRUSTUM_BITS) { + LINE_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 ); + LINE_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 ); + LINE_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 ); + LINE_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 ); + LINE_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 ); + LINE_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 ); + } + + if (mask & CLIP_USER_BIT) { + for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { + if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { + const GLfloat a = ctx->Transform._ClipUserPlane[p][0]; + const GLfloat b = ctx->Transform._ClipUserPlane[p][1]; + const GLfloat c = ctx->Transform._ClipUserPlane[p][2]; + const GLfloat d = ctx->Transform._ClipUserPlane[p][3]; + LINE_CLIP( CLIP_USER_BIT, a, b, c, d ); + } + } + } + + if (VB->ClipMask[v0]) { + INTERP_4F( t0, coord[newvert], coord[v0], coord[v1] ); + interp( ctx, t0, newvert, v0, v1, GL_FALSE ); + v0 = newvert; + newvert++; + } + else { + ASSERT(t0 == 0.0); + } + + /* Note: we need to use vertex v0_orig when computing the new + * interpolated/clipped vertex position, not the current v0 which + * may have got set when we clipped the other end of the line! + */ + if (VB->ClipMask[v1]) { + INTERP_4F( t1, coord[newvert], coord[v1], coord[v0_orig] ); + interp( ctx, t1, newvert, v1, v0_orig, GL_FALSE ); + + if (ctx->Light.ShadeModel == GL_FLAT) + tnl->Driver.Render.CopyPV( ctx, newvert, v1 ); + + v1 = newvert; + + newvert++; + } + else { + ASSERT(t1 == 0.0); + } + + tnl->Driver.Render.ClippedLine( ctx, v0, v1 ); +} + + +/* Clip a triangle against the viewport and user clip planes. + */ +static inline void +TAG(clip_tri)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask ) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct vertex_buffer *VB = &tnl->vb; + tnl_interp_func interp = tnl->Driver.Render.Interp; + GLuint newvert = VB->Count; + GLfloat (*coord)[4] = VB->ClipPtr->data; + GLuint pv = v2; + GLuint vlist[2][MAX_CLIPPED_VERTICES]; + GLuint *inlist = vlist[0], *outlist = vlist[1]; + GLuint p; + GLuint n = 3; + + ASSIGN_3V(inlist, v2, v0, v1 ); /* pv rotated to slot zero */ + + if (0) { + /* print pre-clip vertex coords */ + GLuint i, j; + printf("pre clip:\n"); + for (i = 0; i < n; i++) { + j = inlist[i]; + printf(" %u: %u: %f, %f, %f, %f\n", + i, j, + coord[j][0], coord[j][1], coord[j][2], coord[j][3]); + assert(!IS_INF_OR_NAN(coord[j][0])); + assert(!IS_INF_OR_NAN(coord[j][1])); + assert(!IS_INF_OR_NAN(coord[j][2])); + assert(!IS_INF_OR_NAN(coord[j][3])); + } + } + + + if (mask & CLIP_FRUSTUM_BITS) { + POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 ); + POLY_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 ); + POLY_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 ); + POLY_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 ); + POLY_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 ); + POLY_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 ); + } + + if (mask & CLIP_USER_BIT) { + for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { + if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { + const GLfloat a = ctx->Transform._ClipUserPlane[p][0]; + const GLfloat b = ctx->Transform._ClipUserPlane[p][1]; + const GLfloat c = ctx->Transform._ClipUserPlane[p][2]; + const GLfloat d = ctx->Transform._ClipUserPlane[p][3]; + POLY_CLIP( CLIP_USER_BIT, a, b, c, d ); + } + } + } + + if (ctx->Light.ShadeModel == GL_FLAT) { + if (pv != inlist[0]) { + ASSERT( inlist[0] >= VB->Count ); + tnl->Driver.Render.CopyPV( ctx, inlist[0], pv ); + } + } + + if (0) { + /* print post-clip vertex coords */ + GLuint i, j; + printf("post clip:\n"); + for (i = 0; i < n; i++) { + j = inlist[i]; + printf(" %u: %u: %f, %f, %f, %f\n", + i, j, + coord[j][0], coord[j][1], coord[j][2], coord[j][3]); + } + } + + tnl->Driver.Render.ClippedPolygon( ctx, inlist, n ); +} + + +/* Clip a quad against the viewport and user clip planes. + */ +static inline void +TAG(clip_quad)( struct gl_context *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3, + GLubyte mask ) +{ + TNLcontext *tnl = TNL_CONTEXT(ctx); + struct vertex_buffer *VB = &tnl->vb; + tnl_interp_func interp = tnl->Driver.Render.Interp; + GLuint newvert = VB->Count; + GLfloat (*coord)[4] = VB->ClipPtr->data; + GLuint pv = v3; + GLuint vlist[2][MAX_CLIPPED_VERTICES]; + GLuint *inlist = vlist[0], *outlist = vlist[1]; + GLuint p; + GLuint n = 4; + + ASSIGN_4V(inlist, v3, v0, v1, v2 ); /* pv rotated to slot zero */ + + if (mask & CLIP_FRUSTUM_BITS) { + POLY_CLIP( CLIP_RIGHT_BIT, -1, 0, 0, 1 ); + POLY_CLIP( CLIP_LEFT_BIT, 1, 0, 0, 1 ); + POLY_CLIP( CLIP_TOP_BIT, 0, -1, 0, 1 ); + POLY_CLIP( CLIP_BOTTOM_BIT, 0, 1, 0, 1 ); + POLY_CLIP( CLIP_FAR_BIT, 0, 0, -1, 1 ); + POLY_CLIP( CLIP_NEAR_BIT, 0, 0, 1, 1 ); + } + + if (mask & CLIP_USER_BIT) { + for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { + if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { + const GLfloat a = ctx->Transform._ClipUserPlane[p][0]; + const GLfloat b = ctx->Transform._ClipUserPlane[p][1]; + const GLfloat c = ctx->Transform._ClipUserPlane[p][2]; + const GLfloat d = ctx->Transform._ClipUserPlane[p][3]; + POLY_CLIP( CLIP_USER_BIT, a, b, c, d ); + } + } + } + + if (ctx->Light.ShadeModel == GL_FLAT) { + if (pv != inlist[0]) { + ASSERT( inlist[0] >= VB->Count ); + tnl->Driver.Render.CopyPV( ctx, inlist[0], pv ); + } + } + + tnl->Driver.Render.ClippedPolygon( ctx, inlist, n ); +} + +#undef W +#undef Z +#undef Y +#undef X +#undef SIZE +#undef TAG +#undef POLY_CLIP +#undef LINE_CLIP -- cgit v1.2.3