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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
//============================================================
//
// chainmanager.cpp - BGFX shader chain manager
//
// Maintains a string-to-entry lookup of BGFX shader effect
// chains, defined by chain.h and read by chainreader.h
//
//============================================================
#include "emu.h"
#include <rapidjson/document.h>
#include <bgfx/bgfxplatform.h>
#include <bgfx/bgfx.h>
#include <bx/readerwriter.h>
#include "chainmanager.h"
#include "chainreader.h"
#include "chain.h"
using namespace rapidjson;
chain_manager::~chain_manager()
{
for (std::pair<std::string, bgfx_chain*> chain : m_chains)
{
delete chain.second;
}
m_chains.clear();
}
bgfx_chain* chain_manager::chain(std::string name)
{
std::map<std::string, bgfx_chain*>::iterator iter = m_chains.find(name);
if (iter != m_chains.end())
{
return iter->second;
}
return load_chain(name);
}
bgfx_chain* chain_manager::load_chain(std::string name) {
std::string path = "bgfx/chains/" + name + ".json";
bx::CrtFileReader reader;
bx::open(&reader, path.c_str());
int32_t size = (uint32_t)bx::getSize(&reader);
char* data = new char[size + 1];
bx::read(&reader, reinterpret_cast<void*>(data), size);
bx::close(&reader);
data[size] = 0;
Document document;
document.Parse<0>(data);
bgfx_chain* chain = chain_reader::read_from_value(document, m_textures, m_targets, m_effects, m_width, m_height);
m_chains[name] = chain;
return chain;
}
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