/* * 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 tnl/t_vb_program.c * \brief Pipeline stage for executing NVIDIA vertex programs. * \author Brian Paul, Keith Whitwell */ #include "glheader.h" #include "api_noop.h" #include "colormac.h" #include "context.h" #include "dlist.h" #include "hash.h" #include "light.h" #include "macros.h" #include "imports.h" #include "simple_list.h" #include "mtypes.h" #include "program_instruction.h" #include "nvvertexec.h" #include "nvprogram.h" #include "math/m_translate.h" #include "t_context.h" #include "t_pipeline.h" /*! * Private storage for the vertex program pipeline stage. */ struct vp_stage_data { /** The results of running the vertex program go into these arrays. */ GLvector4f attribs[15]; GLvector4f ndcCoords; /**< normalized device coords */ GLubyte *clipmask; /**< clip flags */ GLubyte ormask, andmask; /**< for clipping */ }; #define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr)) /** * This function executes vertex programs */ static GLboolean run_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage ) { TNLcontext *tnl = TNL_CONTEXT(ctx); struct vp_stage_data *store = VP_STAGE_DATA(stage); struct vertex_buffer *VB = &tnl->vb; struct vertex_program *program = ctx->VertexProgram.Current; GLuint i; if (ctx->ShaderObjects._VertexShaderPresent) return GL_TRUE; if (!ctx->VertexProgram._Enabled || !program->IsNVProgram) return GL_TRUE; /* load program parameter registers (they're read-only) */ _mesa_init_vp_per_primitive_registers(ctx); for (i = 0; i < VB->Count; i++) { GLuint attr; _mesa_init_vp_per_vertex_registers(ctx); #if 0 printf("Input %d: %f, %f, %f, %f\n", i, VB->AttribPtr[0]->data[i][0], VB->AttribPtr[0]->data[i][1], VB->AttribPtr[0]->data[i][2], VB->AttribPtr[0]->data[i][3]); printf(" color: %f, %f, %f, %f\n", VB->AttribPtr[3]->data[i][0], VB->AttribPtr[3]->data[i][1], VB->AttribPtr[3]->data[i][2], VB->AttribPtr[3]->data[i][3]); printf(" normal: %f, %f, %f, %f\n", VB->AttribPtr[2]->data[i][0], VB->AttribPtr[2]->data[i][1], VB->AttribPtr[2]->data[i][2], VB->AttribPtr[2]->data[i][3]); #endif /* the vertex array case */ for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) { if (program->Base.InputsRead & (1 << attr)) { const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data; const GLuint size = VB->AttribPtr[attr]->size; const GLuint stride = VB->AttribPtr[attr]->stride; const GLfloat *data = (GLfloat *) (ptr + stride * i); COPY_CLEAN_4V(ctx->VertexProgram.Inputs[attr], size, data); } } /* execute the program */ ASSERT(program); _mesa_exec_vertex_program(ctx, program); /* Fixup fog an point size results if needed */ if (ctx->Fog.Enabled && (program->Base.OutputsWritten & (1 << VERT_RESULT_FOGC)) == 0) { ctx->VertexProgram.Outputs[VERT_RESULT_FOGC][0] = 1.0; } if (ctx->VertexProgram.PointSizeEnabled && (program->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ)) == 0) { ctx->VertexProgram.Outputs[VERT_RESULT_PSIZ][0] = ctx->Point.Size; } /* copy the output registers into the VB->attribs arrays */ /* XXX (optimize) could use a conditional and smaller loop limit here */ for (attr = 0; attr < 15; attr++) { COPY_4V(store->attribs[attr].data[i], ctx->VertexProgram.Outputs[attr]); } } /* Setup the VB pointers so that the next pipeline stages get * their data from the right place (the program output arrays). */ VB->ClipPtr = &store->attribs[VERT_RESULT_HPOS]; VB->ClipPtr->size = 4; VB->ClipPtr->count = VB->Count; VB->ColorPtr[0] = &store->attribs[VERT_RESULT_COL0]; VB->ColorPtr[1] = &store->attribs[VERT_RESULT_BFC0]; VB->SecondaryColorPtr[0] = &store->attribs[VERT_RESULT_COL1]; VB->SecondaryColorPtr[1] = &store->attribs[VERT_RESULT_BFC1]; VB->FogCoordPtr = &store->attribs[VERT_RESULT_FOGC]; VB->PointSizePtr = &store->attribs[VERT_RESULT_PSIZ]; VB->AttribPtr[VERT_ATTRIB_COLOR0] = VB->ColorPtr[0]; VB->AttribPtr[VERT_ATTRIB_COLOR1] = VB->SecondaryColorPtr[0]; VB->AttribPtr[VERT_ATTRIB_FOG] = VB->FogCoordPtr; VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->attribs[VERT_RESULT_PSIZ]; for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) { VB->AttribPtr[VERT_ATTRIB_TEX0+i] = VB->TexCoordPtr[i] = &store->attribs[VERT_RESULT_TEX0 + i]; } /* Cliptest and perspective divide. Clip functions must clear * the clipmask. */ store->ormask = 0; store->andmask = CLIP_FRUSTUM_BITS; if (tnl->NeedNdcCoords) { VB->NdcPtr = _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr, &store->ndcCoords, store->clipmask, &store->ormask, &store->andmask ); } else { VB->NdcPtr = NULL; _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr, NULL, store->clipmask, &store->ormask, &store->andmask ); } if (store->andmask) /* All vertices are outside the frustum */ return GL_FALSE; /* This is where we'd do clip testing against the user-defined * clipping planes, but they're not supported by vertex programs. */ VB->ClipOrMask = store->ormask; VB->ClipMask = store->clipmask; return GL_TRUE; } /** * Called the first time stage->run is called. In effect, don't * allocate data until the first time the stage is run. */ static GLboolean init_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage ) { TNLcontext *tnl = TNL_CONTEXT(ctx); struct vertex_buffer *VB = &(tnl->vb); struct vp_stage_data *store; const GLuint size = VB->Size; GLuint i; stage->privatePtr = MALLOC(sizeof(*store)); store = VP_STAGE_DATA(stage); if (!store) return GL_FALSE; /* Allocate arrays of vertex output values */ for (i = 0; i < 15; i++) { _mesa_vector4f_alloc( &store->attribs[i], 0, size, 32 ); store->attribs[i].size = 4; } /* a few other misc allocations */ _mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 ); store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 ); return GL_TRUE; } /** * Destructor for this pipeline stage. */ static void dtr( struct tnl_pipeline_stage *stage ) { struct vp_stage_data *store = VP_STAGE_DATA(stage); if (store) { GLuint i; /* free the vertex program result arrays */ for (i = 0; i < VERT_RESULT_MAX; i++) _mesa_vector4f_free( &store->attribs[i] ); /* free misc arrays */ _mesa_vector4f_free( &store->ndcCoords ); ALIGN_FREE( store->clipmask ); FREE( store ); stage->privatePtr = NULL; } } /** * Public description of this pipeline stage. */ const struct tnl_pipeline_stage _tnl_vertex_program_stage = { "vertex-program", NULL, /* private_data */ init_vp, /* create */ dtr, /* destroy */ NULL, /* validate */ run_vp /* run -- initially set to ctr */ };