205 lines
5.3 KiB
C
205 lines
5.3 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Keith Whitwell <keithw@vmware.com>
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*/
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#include "main/errors.h"
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#include "main/bufferobj.h"
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#include "math/m_eval.h"
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#include "main/api_arrayelt.h"
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#include "main/arrayobj.h"
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#include "main/varray.h"
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#include "util/u_memory.h"
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#include "vbo.h"
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#include "vbo_private.h"
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static GLuint
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check_size(const GLfloat *attr)
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{
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if (attr[3] != 1.0F)
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return 4;
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if (attr[2] != 0.0F)
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return 3;
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if (attr[1] != 0.0F)
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return 2;
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return 1;
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}
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/**
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* Helper for initializing a vertex array.
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*/
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static void
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init_array(struct gl_context *ctx, struct gl_array_attributes *attrib,
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unsigned size, const void *pointer)
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{
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memset(attrib, 0, sizeof(*attrib));
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vbo_set_vertex_format(&attrib->Format, size, GL_FLOAT);
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attrib->Stride = 0;
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attrib->Ptr = pointer;
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}
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/**
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* Set up the vbo->currval arrays to point at the context's current
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* vertex attributes (with strides = 0).
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*/
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static void
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init_legacy_currval(struct gl_context *ctx)
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{
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struct vbo_context *vbo = vbo_context(ctx);
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/* Set up a constant (Stride == 0) array for each current
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* attribute:
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*/
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for (int attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
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if (VERT_BIT(attr) & VERT_BIT_GENERIC_ALL)
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continue;
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struct gl_array_attributes *attrib = &vbo->current[attr];
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init_array(ctx, attrib, check_size(ctx->Current.Attrib[attr]),
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ctx->Current.Attrib[attr]);
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}
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}
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static void
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init_generic_currval(struct gl_context *ctx)
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{
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struct vbo_context *vbo = vbo_context(ctx);
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GLuint i;
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for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
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const unsigned attr = VBO_ATTRIB_GENERIC0 + i;
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struct gl_array_attributes *attrib = &vbo->current[attr];
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init_array(ctx, attrib, 1, ctx->Current.Attrib[attr]);
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}
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}
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static void
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init_mat_currval(struct gl_context *ctx)
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{
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struct vbo_context *vbo = vbo_context(ctx);
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GLuint i;
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/* Set up a constant (StrideB == 0) array for each current
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* attribute:
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*/
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for (i = 0; i < MAT_ATTRIB_MAX; i++) {
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const unsigned attr = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
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struct gl_array_attributes *attrib = &vbo->current[attr];
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unsigned size;
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/* Size is fixed for the material attributes, for others will
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* be determined at runtime:
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*/
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switch (i) {
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case MAT_ATTRIB_FRONT_SHININESS:
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case MAT_ATTRIB_BACK_SHININESS:
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size = 1;
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break;
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case MAT_ATTRIB_FRONT_INDEXES:
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case MAT_ATTRIB_BACK_INDEXES:
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size = 3;
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break;
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default:
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size = 4;
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break;
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}
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init_array(ctx, attrib, size, ctx->Light.Material.Attrib[i]);
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}
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}
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void
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vbo_exec_update_eval_maps(struct gl_context *ctx)
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{
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struct vbo_context *vbo = vbo_context(ctx);
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vbo->exec.eval.recalculate_maps = GL_TRUE;
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}
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GLboolean
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_vbo_CreateContext(struct gl_context *ctx)
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{
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struct vbo_context *vbo = &ctx->vbo_context;
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memset(vbo, 0, sizeof(*vbo));
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init_legacy_currval(ctx);
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init_generic_currval(ctx);
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init_mat_currval(ctx);
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/* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
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STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
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/* Hook our functions into exec and compile dispatch tables. These
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* will pretty much be permanently installed, which means that the
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* vtxfmt mechanism can be removed now.
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*/
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vbo_exec_init(ctx);
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if (ctx->API == API_OPENGL_COMPAT)
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vbo_save_init(ctx);
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vbo->VAO = _mesa_new_vao(ctx, ~((GLuint)0));
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/* The exec VAO assumes to have all arributes bound to binding 0 */
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for (unsigned i = 0; i < VERT_ATTRIB_MAX; ++i)
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_mesa_vertex_attrib_binding(ctx, vbo->VAO, i, 0);
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_math_init_eval();
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return GL_TRUE;
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}
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void
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_vbo_DestroyContext(struct gl_context *ctx)
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{
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struct vbo_context *vbo = vbo_context(ctx);
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if (vbo) {
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vbo_exec_destroy(ctx);
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if (ctx->API == API_OPENGL_COMPAT)
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vbo_save_destroy(ctx);
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_mesa_reference_vao(ctx, &vbo->VAO, NULL);
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}
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}
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const struct gl_array_attributes *
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_vbo_current_attrib(const struct gl_context *ctx, gl_vert_attrib attr)
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{
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const struct vbo_context *vbo = vbo_context_const(ctx);
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const gl_vertex_processing_mode vmp = ctx->VertexProgram._VPMode;
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return &vbo->current[_vbo_attribute_alias_map[vmp][attr]];
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}
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