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/*
* 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 <keithw@vmware.com>
*/
#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;
}
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