t_vb_program.c revision ee4e75bd6f768b7210436feeb32b4545ed62e025
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.5 4 * 5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 26/** 27 * \file tnl/t_vb_program.c 28 * \brief Pipeline stage for executing NVIDIA vertex programs. 29 * \author Brian Paul, Keith Whitwell 30 */ 31 32 33#include "glheader.h" 34#include "api_noop.h" 35#include "colormac.h" 36#include "context.h" 37#include "dlist.h" 38#include "hash.h" 39#include "light.h" 40#include "macros.h" 41#include "imports.h" 42#include "simple_list.h" 43#include "mtypes.h" 44#include "program_instruction.h" 45#include "nvvertexec.h" 46#include "nvprogram.h" 47 48#include "math/m_translate.h" 49 50#include "t_context.h" 51#include "t_pipeline.h" 52 53 54 55/*! 56 * Private storage for the vertex program pipeline stage. 57 */ 58struct vp_stage_data { 59 /** The results of running the vertex program go into these arrays. */ 60 GLvector4f attribs[15]; 61 62 GLvector4f ndcCoords; /**< normalized device coords */ 63 GLubyte *clipmask; /**< clip flags */ 64 GLubyte ormask, andmask; /**< for clipping */ 65}; 66 67 68#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr)) 69 70 71/** 72 * This function executes vertex programs 73 */ 74static GLboolean 75run_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage ) 76{ 77 TNLcontext *tnl = TNL_CONTEXT(ctx); 78 struct vp_stage_data *store = VP_STAGE_DATA(stage); 79 struct vertex_buffer *VB = &tnl->vb; 80 struct vertex_program *program = ctx->VertexProgram.Current; 81 GLuint i; 82 83 if (ctx->ShaderObjects._VertexShaderPresent) 84 return GL_TRUE; 85 86 if (!ctx->VertexProgram._Enabled || 87 !program->IsNVProgram) 88 return GL_TRUE; 89 90 /* load program parameter registers (they're read-only) */ 91 _mesa_init_vp_per_primitive_registers(ctx); 92 93 for (i = 0; i < VB->Count; i++) { 94 GLuint attr; 95 96 _mesa_init_vp_per_vertex_registers(ctx); 97 98#if 0 99 printf("Input %d: %f, %f, %f, %f\n", i, 100 VB->AttribPtr[0]->data[i][0], 101 VB->AttribPtr[0]->data[i][1], 102 VB->AttribPtr[0]->data[i][2], 103 VB->AttribPtr[0]->data[i][3]); 104 printf(" color: %f, %f, %f, %f\n", 105 VB->AttribPtr[3]->data[i][0], 106 VB->AttribPtr[3]->data[i][1], 107 VB->AttribPtr[3]->data[i][2], 108 VB->AttribPtr[3]->data[i][3]); 109 printf(" normal: %f, %f, %f, %f\n", 110 VB->AttribPtr[2]->data[i][0], 111 VB->AttribPtr[2]->data[i][1], 112 VB->AttribPtr[2]->data[i][2], 113 VB->AttribPtr[2]->data[i][3]); 114#endif 115 116 /* the vertex array case */ 117 for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) { 118 if (program->Base.InputsRead & (1 << attr)) { 119 const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data; 120 const GLuint size = VB->AttribPtr[attr]->size; 121 const GLuint stride = VB->AttribPtr[attr]->stride; 122 const GLfloat *data = (GLfloat *) (ptr + stride * i); 123 COPY_CLEAN_4V(ctx->VertexProgram.Inputs[attr], size, data); 124 } 125 } 126 127 /* execute the program */ 128 ASSERT(program); 129 _mesa_exec_vertex_program(ctx, program); 130 131 /* Fixup fog an point size results if needed */ 132 if (ctx->Fog.Enabled && 133 (program->Base.OutputsWritten & (1 << VERT_RESULT_FOGC)) == 0) { 134 ctx->VertexProgram.Outputs[VERT_RESULT_FOGC][0] = 1.0; 135 } 136 137 if (ctx->VertexProgram.PointSizeEnabled && 138 (program->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ)) == 0) { 139 ctx->VertexProgram.Outputs[VERT_RESULT_PSIZ][0] = ctx->Point.Size; 140 } 141 142 /* copy the output registers into the VB->attribs arrays */ 143 /* XXX (optimize) could use a conditional and smaller loop limit here */ 144 for (attr = 0; attr < 15; attr++) { 145 COPY_4V(store->attribs[attr].data[i], 146 ctx->VertexProgram.Outputs[attr]); 147 } 148 } 149 150 /* Setup the VB pointers so that the next pipeline stages get 151 * their data from the right place (the program output arrays). 152 */ 153 VB->ClipPtr = &store->attribs[VERT_RESULT_HPOS]; 154 VB->ClipPtr->size = 4; 155 VB->ClipPtr->count = VB->Count; 156 VB->ColorPtr[0] = &store->attribs[VERT_RESULT_COL0]; 157 VB->ColorPtr[1] = &store->attribs[VERT_RESULT_BFC0]; 158 VB->SecondaryColorPtr[0] = &store->attribs[VERT_RESULT_COL1]; 159 VB->SecondaryColorPtr[1] = &store->attribs[VERT_RESULT_BFC1]; 160 VB->FogCoordPtr = &store->attribs[VERT_RESULT_FOGC]; 161 VB->PointSizePtr = &store->attribs[VERT_RESULT_PSIZ]; 162 163 VB->AttribPtr[VERT_ATTRIB_COLOR0] = VB->ColorPtr[0]; 164 VB->AttribPtr[VERT_ATTRIB_COLOR1] = VB->SecondaryColorPtr[0]; 165 VB->AttribPtr[VERT_ATTRIB_FOG] = VB->FogCoordPtr; 166 VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->attribs[VERT_RESULT_PSIZ]; 167 168 for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) { 169 VB->AttribPtr[VERT_ATTRIB_TEX0+i] = VB->TexCoordPtr[i] = 170 &store->attribs[VERT_RESULT_TEX0 + i]; 171 } 172 173 174 175 /* Cliptest and perspective divide. Clip functions must clear 176 * the clipmask. 177 */ 178 store->ormask = 0; 179 store->andmask = CLIP_FRUSTUM_BITS; 180 181 if (tnl->NeedNdcCoords) { 182 VB->NdcPtr = 183 _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr, 184 &store->ndcCoords, 185 store->clipmask, 186 &store->ormask, 187 &store->andmask ); 188 } 189 else { 190 VB->NdcPtr = NULL; 191 _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr, 192 NULL, 193 store->clipmask, 194 &store->ormask, 195 &store->andmask ); 196 } 197 198 if (store->andmask) /* All vertices are outside the frustum */ 199 return GL_FALSE; 200 201 202 /* This is where we'd do clip testing against the user-defined 203 * clipping planes, but they're not supported by vertex programs. 204 */ 205 206 VB->ClipOrMask = store->ormask; 207 VB->ClipMask = store->clipmask; 208 209 return GL_TRUE; 210} 211 212 213 214 215/** 216 * Called the first time stage->run is called. In effect, don't 217 * allocate data until the first time the stage is run. 218 */ 219static GLboolean init_vp( GLcontext *ctx, 220 struct tnl_pipeline_stage *stage ) 221{ 222 TNLcontext *tnl = TNL_CONTEXT(ctx); 223 struct vertex_buffer *VB = &(tnl->vb); 224 struct vp_stage_data *store; 225 const GLuint size = VB->Size; 226 GLuint i; 227 228 stage->privatePtr = MALLOC(sizeof(*store)); 229 store = VP_STAGE_DATA(stage); 230 if (!store) 231 return GL_FALSE; 232 233 /* Allocate arrays of vertex output values */ 234 for (i = 0; i < 15; i++) { 235 _mesa_vector4f_alloc( &store->attribs[i], 0, size, 32 ); 236 store->attribs[i].size = 4; 237 } 238 239 /* a few other misc allocations */ 240 _mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 ); 241 store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 ); 242 243 return GL_TRUE; 244} 245 246 247 248 249 250/** 251 * Destructor for this pipeline stage. 252 */ 253static void dtr( struct tnl_pipeline_stage *stage ) 254{ 255 struct vp_stage_data *store = VP_STAGE_DATA(stage); 256 257 if (store) { 258 GLuint i; 259 260 /* free the vertex program result arrays */ 261 for (i = 0; i < VERT_RESULT_MAX; i++) 262 _mesa_vector4f_free( &store->attribs[i] ); 263 264 /* free misc arrays */ 265 _mesa_vector4f_free( &store->ndcCoords ); 266 ALIGN_FREE( store->clipmask ); 267 268 FREE( store ); 269 stage->privatePtr = NULL; 270 } 271} 272 273/** 274 * Public description of this pipeline stage. 275 */ 276const struct tnl_pipeline_stage _tnl_vertex_program_stage = 277{ 278 "vertex-program", 279 NULL, /* private_data */ 280 init_vp, /* create */ 281 dtr, /* destroy */ 282 NULL, /* validate */ 283 run_vp /* run -- initially set to ctr */ 284}; 285