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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the definition of DrawElement.
#include "core/cross/precompile.h"
#include "core/cross/param_cache.h"
#include "core/cross/effect.h"
#include "core/cross/element.h"
#include "core/cross/draw_element.h"
#include "core/cross/material.h"
#include "core/cross/renderer.h"
namespace o3d {
void ParamCache::ClearParamCache() {
rebuild_cache_ = true;
}
bool ParamCache::ValidateAndCacheParams(Effect* effect,
DrawElement* draw_element,
Element* element,
StreamBank* stream_bank,
Material* material,
ParamObject* override) {
if (rebuild_cache_ ||
draw_element_tracker_.NeedToUpdate(draw_element) ||
element_tracker_.NeedToUpdate(element) ||
material_tracker_.NeedToUpdate(material) ||
effect_tracker_.NeedToUpdate(effect) ||
stream_bank_tracker_.NeedToUpdate(stream_bank) ||
override_tracker_.NeedToUpdate(override) ||
!ValidateEffect(effect)) {
UpdateCache(effect, draw_element, element, material, override);
draw_element_tracker_.Update(draw_element);
element_tracker_.Update(element);
material_tracker_.Update(material);
effect_tracker_.Update(effect);
stream_bank_tracker_.Update(stream_bank);
override_tracker_.Update(override);
rebuild_cache_ = false;
return false;
}
return true;
}
ParamCacheManager::ParamCacheManager(Renderer* renderer)
: top_cache_index_(0),
last_render_count_(renderer->render_frame_count() - 1) {
}
ParamCacheManager::~ParamCacheManager() {
for (unsigned ii = 0; ii < param_caches_.size(); ++ii) {
delete param_caches_[ii];
}
}
ParamCache* ParamCacheManager::GetNextCache(Renderer* renderer) {
// If this is the first time we've been asked for a cache this frame
// reset to start using the first cache.
if (renderer->render_frame_count() != last_render_count_) {
last_render_count_ = renderer->render_frame_count();
// remove any un-needed caches.
for (unsigned ii = top_cache_index_; ii < param_caches_.size(); ++ii) {
renderer->FreeParamCache(param_caches_[ii]);
param_caches_[ii] = NULL;
}
// Reset to first cache.
top_cache_index_ = 0;
}
// ParamCaches only get created once and then reused. This saves lots of
// allocations/deallocation that would otherwise happen every frame.
// If I instead used size() then I would have to clear() param_caches_ each
// frame which in turn would mean I'd need to keep a separate container of
// ParamCaches to keep track of the ParamCaches I'm keeping around and pulling
// them out of that container and putting them in this one.
// Instead I just keep using the ones in this container and use
// top_cache_index_ to track the highest used ParamCache.
if (top_cache_index_ >= param_caches_.size()) {
param_caches_.push_back(NULL);
}
ParamCache* param_cache = param_caches_[top_cache_index_];
if (!param_cache) {
param_cache = renderer->CreateParamCache();
param_caches_[top_cache_index_] = param_cache;
}
++top_cache_index_;
return param_cache;
}
} // namespace o3d
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