/* * Mesa 3-D graphics library * * 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 * THE AUTHORS OR COPYRIGHT HOLDERS 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 */ #include "main/errors.h" #include "main/bufferobj.h" #include "math/m_eval.h" #include "main/vtxfmt.h" #include "main/api_arrayelt.h" #include "main/arrayobj.h" #include "main/varray.h" #include "vbo.h" #include "vbo_private.h" static GLuint check_size(const GLfloat *attr) { if (attr[3] != 1.0F) return 4; if (attr[2] != 0.0F) return 3; if (attr[1] != 0.0F) return 2; return 1; } /** * Helper for initializing a vertex array. */ static void init_array(struct gl_context *ctx, struct gl_array_attributes *attrib, unsigned size, const void *pointer) { memset(attrib, 0, sizeof(*attrib)); vbo_set_vertex_format(&attrib->Format, size, GL_FLOAT); attrib->Stride = 0; attrib->Ptr = pointer; } /** * Set up the vbo->currval arrays to point at the context's current * vertex attributes (with strides = 0). */ static void init_legacy_currval(struct gl_context *ctx) { struct vbo_context *vbo = vbo_context(ctx); GLuint i; /* Set up a constant (Stride == 0) array for each current * attribute: */ for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) { const unsigned attr = VERT_ATTRIB_FF(i); struct gl_array_attributes *attrib = &vbo->current[attr]; init_array(ctx, attrib, check_size(ctx->Current.Attrib[attr]), ctx->Current.Attrib[attr]); } } static void init_generic_currval(struct gl_context *ctx) { struct vbo_context *vbo = vbo_context(ctx); GLuint i; for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) { const unsigned attr = VBO_ATTRIB_GENERIC0 + i; struct gl_array_attributes *attrib = &vbo->current[attr]; init_array(ctx, attrib, 1, ctx->Current.Attrib[attr]); } } static void init_mat_currval(struct gl_context *ctx) { struct vbo_context *vbo = vbo_context(ctx); GLuint i; /* Set up a constant (StrideB == 0) array for each current * attribute: */ for (i = 0; i < MAT_ATTRIB_MAX; i++) { const unsigned attr = VBO_ATTRIB_MAT_FRONT_AMBIENT + i; struct gl_array_attributes *attrib = &vbo->current[attr]; unsigned size; /* Size is fixed for the material attributes, for others will * be determined at runtime: */ switch (i) { case MAT_ATTRIB_FRONT_SHININESS: case MAT_ATTRIB_BACK_SHININESS: size = 1; break; case MAT_ATTRIB_FRONT_INDEXES: case MAT_ATTRIB_BACK_INDEXES: size = 3; break; default: size = 4; break; } init_array(ctx, attrib, size, ctx->Light.Material.Attrib[i]); } } void _vbo_install_exec_vtxfmt(struct gl_context *ctx) { struct vbo_context *vbo = vbo_context(ctx); _mesa_install_exec_vtxfmt(ctx, &vbo->exec.vtxfmt); } void vbo_exec_invalidate_state(struct gl_context *ctx) { struct vbo_context *vbo = vbo_context(ctx); struct vbo_exec_context *exec = &vbo->exec; if (ctx->NewState & _NEW_EVAL) exec->eval.recalculate_maps = GL_TRUE; } GLboolean _vbo_CreateContext(struct gl_context *ctx, bool use_buffer_objects) { struct vbo_context *vbo = CALLOC_STRUCT(vbo_context); ctx->vbo_context = vbo; vbo->binding.Offset = 0; vbo->binding.Stride = 0; vbo->binding.InstanceDivisor = 0; _mesa_reference_buffer_object(ctx, &vbo->binding.BufferObj, ctx->Shared->NullBufferObj); init_legacy_currval(ctx); init_generic_currval(ctx); init_mat_currval(ctx); /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */ STATIC_ASSERT(VBO_ATTRIB_MAX <= 255); /* Hook our functions into exec and compile dispatch tables. These * will pretty much be permanently installed, which means that the * vtxfmt mechanism can be removed now. */ vbo_exec_init(ctx, use_buffer_objects); if (ctx->API == API_OPENGL_COMPAT) vbo_save_init(ctx); vbo->VAO = _mesa_new_vao(ctx, ~((GLuint)0)); /* The exec VAO assumes to have all arributes bound to binding 0 */ for (unsigned i = 0; i < VERT_ATTRIB_MAX; ++i) _mesa_vertex_attrib_binding(ctx, vbo->VAO, i, 0); _math_init_eval(); return GL_TRUE; } void _vbo_DestroyContext(struct gl_context *ctx) { struct vbo_context *vbo = vbo_context(ctx); if (vbo) { _mesa_reference_buffer_object(ctx, &vbo->binding.BufferObj, NULL); vbo_exec_destroy(ctx); if (ctx->API == API_OPENGL_COMPAT) vbo_save_destroy(ctx); _mesa_reference_vao(ctx, &vbo->VAO, NULL); free(vbo); ctx->vbo_context = NULL; } } const struct gl_array_attributes * _vbo_current_attrib(const struct gl_context *ctx, gl_vert_attrib attr) { const struct vbo_context *vbo = vbo_context_const(ctx); const gl_vertex_processing_mode vmp = ctx->VertexProgram._VPMode; return &vbo->current[_vbo_attribute_alias_map[vmp][attr]]; } const struct gl_vertex_buffer_binding * _vbo_current_binding(const struct gl_context *ctx) { const struct vbo_context *vbo = vbo_context_const(ctx); return &vbo->binding; }