/* * Mesa 3-D graphics library * Version: 6.3 * * Copyright (C) 1999-2005 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 <keith@tungstengraphics.com> */ #include "main/api_arrayelt.h" #include "main/glheader.h" #include "main/mtypes.h" #include "main/vtxfmt.h" #include "vbo_context.h" void vbo_exec_init( struct gl_context *ctx ) { struct vbo_exec_context *exec = &vbo_context(ctx)->exec; exec->ctx = ctx; /* Initialize the arrayelt helper */ if (!ctx->aelt_context && !_ae_create_context( ctx )) return; vbo_exec_vtx_init( exec ); vbo_exec_array_init( exec ); /* Hook our functions into exec and compile dispatch tables. */ _mesa_install_exec_vtxfmt( ctx, &exec->vtxfmt ); ctx->Driver.NeedFlush = 0; ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END; ctx->Driver.BeginVertices = vbo_exec_BeginVertices; ctx->Driver.FlushVertices = vbo_exec_FlushVertices; vbo_exec_invalidate_state( ctx, ~0 ); } void vbo_exec_destroy( struct gl_context *ctx ) { struct vbo_exec_context *exec = &vbo_context(ctx)->exec; if (ctx->aelt_context) { _ae_destroy_context( ctx ); ctx->aelt_context = NULL; } vbo_exec_vtx_destroy( exec ); vbo_exec_array_destroy( exec ); } /** * Really want to install these callbacks to a central facility to be * invoked according to the state flags. That will have to wait for a * mesa rework: */ void vbo_exec_invalidate_state( struct gl_context *ctx, GLuint new_state ) { struct vbo_exec_context *exec = &vbo_context(ctx)->exec; if (new_state & (_NEW_PROGRAM|_NEW_ARRAY)) { exec->array.recalculate_inputs = GL_TRUE; } if (new_state & _NEW_EVAL) exec->eval.recalculate_maps = 1; _ae_invalidate_state(ctx, new_state); } /** * Figure out the number of transform feedback primitives that will be output * by the given _mesa_prim command, assuming that no geometry shading is done * and primitive restart is not used. * * This is intended for use by driver back-ends in implementing the * PRIMITIVES_GENERATED and TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN queries. */ size_t vbo_count_tessellated_primitives(const struct _mesa_prim *prim) { size_t num_primitives; switch (prim->mode) { case GL_POINTS: num_primitives = prim->count; break; case GL_LINE_STRIP: num_primitives = prim->count >= 2 ? prim->count - 1 : 0; break; case GL_LINE_LOOP: num_primitives = prim->count >= 2 ? prim->count : 0; break; case GL_LINES: num_primitives = prim->count / 2; break; case GL_TRIANGLE_STRIP: case GL_TRIANGLE_FAN: case GL_POLYGON: num_primitives = prim->count >= 3 ? prim->count - 2 : 0; break; case GL_TRIANGLES: num_primitives = prim->count / 3; break; case GL_QUAD_STRIP: num_primitives = prim->count >= 4 ? ((prim->count / 2) - 1) * 2 : 0; break; case GL_QUADS: num_primitives = (prim->count / 4) * 2; break; default: assert(!"Unexpected primitive type in count_tessellated_primitives"); num_primitives = 0; break; } return num_primitives * prim->num_instances; }