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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2020 Blender Foundation. All rights reserved. */
/** \file
* \ingroup gpu
*/
#include "gl_query.hh"
namespace blender::gpu {
#define QUERY_CHUNCK_LEN 256
GLQueryPool::~GLQueryPool()
{
glDeleteQueries(query_ids_.size(), query_ids_.data());
}
void GLQueryPool::init(GPUQueryType type)
{
BLI_assert(initialized_ == false);
initialized_ = true;
type_ = type;
gl_type_ = to_gl(type);
query_issued_ = 0;
}
#if 0 /* TODO: to avoid realloc of permanent query pool. */
void GLQueryPool::reset(GPUQueryType type)
{
initialized_ = false;
}
#endif
void GLQueryPool::begin_query()
{
/* TODO: add assert about expected usage. */
while (query_issued_ >= query_ids_.size()) {
int64_t prev_size = query_ids_.size();
query_ids_.resize(prev_size + QUERY_CHUNCK_LEN);
glGenQueries(QUERY_CHUNCK_LEN, &query_ids_[prev_size]);
}
glBeginQuery(gl_type_, query_ids_[query_issued_++]);
}
void GLQueryPool::end_query()
{
/* TODO: add assert about expected usage. */
glEndQuery(gl_type_);
}
void GLQueryPool::get_occlusion_result(MutableSpan<uint32_t> r_values)
{
BLI_assert(r_values.size() == query_issued_);
for (int i = 0; i < query_issued_; i++) {
/* NOTE: This is a sync point. */
glGetQueryObjectuiv(query_ids_[i], GL_QUERY_RESULT, &r_values[i]);
}
}
} // namespace blender::gpu
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