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/***************************************************************************
*
* Copyright 2010,2011 BMW Car IT GmbH
*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
****************************************************************************/
#include "ShaderDestroyCommand.h"
#include "ICommandExecutor.h"
#include "Scene.h"
#include "Log.h"
#include "ShaderMap.h"
ExecutionResult ShaderDestroyCommand::execute(ICommandExecutor* executor)
{
Scene& scene = *(executor->getScene());
ExecutionResult result = ExecutionFailed;
// get shader by its ID
ShaderMapIterator iter = scene.m_shaderMap.find(m_id);
ShaderMapIterator iterEnd = scene.m_shaderMap.end();
if (iter == iterEnd)
{
// shader not found
LOG_ERROR("Layermanager", "shader ID " << m_id << " not found");
return ExecutionFailed;
}
Shader* shader = (*iter).second;
if (shader)
{
const SurfaceMap& surfaceMap = scene.getAllSurfaces();
result = removeShaderFromAllSurfaces(surfaceMap, shader) ? ExecutionSuccessRedraw : ExecutionSuccess;
const LayerMap& layerMap = scene.getAllLayers();
result = removeShaderFromAllLayers(layerMap, shader) ? ExecutionSuccessRedraw : result;
// remove shader from global shader list
scene.m_shaderMap.erase(iter);
// finally delete it
delete shader;
}
return result;
}
/// detach shader from all surfaces
bool ShaderDestroyCommand::removeShaderFromAllSurfaces(const SurfaceMap & surfaceMap, Shader* shader)
{
bool result = false;
SurfaceMapConstIterator iter = surfaceMap.begin();
SurfaceMapConstIterator iterEnd = surfaceMap.end();
for (; iter != iterEnd; ++iter)
{
GraphicalObject* obj = iter->second;
if (obj && obj->getShader() == shader)
{
obj->setShader(NULL);
result = true;
}
}
return result;
}
bool ShaderDestroyCommand::removeShaderFromAllLayers(const LayerMap & layerMap, Shader *& shader)
{
bool result = false;
LayerMapConstIterator iter = layerMap.begin();
LayerMapConstIterator iterEnd = layerMap.end();
for (; iter != iterEnd; ++iter)
{
GraphicalObject* obj = iter->second;
if (obj && obj->getShader()==shader)
{
obj->setShader(NULL);
result = true;
}
}
return result;
}
unsigned int ShaderDestroyCommand::getShaderID() const
{
return m_id;
}
const std::string ShaderDestroyCommand::getString()
{
std::stringstream description;
description << "DestroyShaderCommand("
<< "id=" << m_id << "(0x" << std::hex << m_id << ")" << std::dec
<< ")";
return description.str();
}
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