💿🐜 Antkeeper source code
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
3.5 KiB
107 lines
3.5 KiB
/*
|
|
* Copyright (C) 2021 Christopher J. Howard
|
|
*
|
|
* This file is part of Antkeeper source code.
|
|
*
|
|
* Antkeeper source code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Antkeeper source code is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "resources/resource-loader.hpp"
|
|
#include "resources/resource-manager.hpp"
|
|
#include "resources/text-file.hpp"
|
|
#include "renderer/shader-template.hpp"
|
|
#include "gl/shader-object.hpp"
|
|
#include "gl/shader-program.hpp"
|
|
#include <sstream>
|
|
|
|
/**
|
|
* Handles `#pragma include` directives by loading the specified text files and inserting them in place.
|
|
*/
|
|
static void handle_includes(text_file* source, resource_manager* resource_manager)
|
|
{
|
|
// For each line in the source
|
|
for (std::size_t i = 0; i < source->size(); ++i)
|
|
{
|
|
std::string token;
|
|
std::istringstream line_stream((*source)[i]);
|
|
|
|
// If line contains a `#pragma include` directive
|
|
if (line_stream >> token && token == "#pragma" &&
|
|
line_stream >> token && token == "include")
|
|
{
|
|
// If third token is enclosed in quotes or angled brackets
|
|
if (line_stream >> token && token.size() > 2 &&
|
|
((token.front() == '\"' && token.back() == '\"') ||
|
|
(token.front() == '<' && token.back() == '>')))
|
|
{
|
|
// Extract include path
|
|
std::string path = token.substr(1, token.length() - 2);
|
|
|
|
// Load include file
|
|
if (!resource_manager->load<text_file>(path))
|
|
{
|
|
(*source)[i] = "#error file not found (" + path + ")";
|
|
}
|
|
else
|
|
{
|
|
// Create copy of include file
|
|
text_file include_file = *(resource_manager->load<text_file>(path));
|
|
|
|
// Handle `#pragma include` directives inside include file
|
|
handle_includes(&include_file, resource_manager);
|
|
|
|
// Replace #pragma include directive with include file contents
|
|
source->erase(source->begin() + i);
|
|
source->insert(source->begin() + i, include_file.begin(), include_file.end());
|
|
i += include_file.size() - 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
(*source)[i] = "#error malformed include directive (" + (*source)[i] + ")";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <>
|
|
gl::shader_program* resource_loader<gl::shader_program>::load(resource_manager* resource_manager, PHYSFS_File* file)
|
|
{
|
|
// Load shader template source
|
|
text_file source_lines = *resource_loader<text_file>::load(resource_manager, file);
|
|
|
|
// Handle `#pragma include` directives
|
|
handle_includes(&source_lines, resource_manager);
|
|
|
|
// Join vector of source lines into single string
|
|
std::ostringstream stream;
|
|
std::copy(source_lines.begin(), source_lines.end(), std::ostream_iterator<std::string>(stream, "\n"));
|
|
|
|
// Create shader template
|
|
shader_template* shader = new shader_template(stream.str());
|
|
|
|
// Build shader program
|
|
gl::shader_program* program = shader->build(shader_template::dictionary_type());
|
|
|
|
// Check if shader program was linked successfully
|
|
if (!program->was_linked())
|
|
{
|
|
throw std::runtime_error("Shader program linking failed: " + program->get_info_log());
|
|
}
|
|
|
|
// Destroy shader template
|
|
delete shader;
|
|
|
|
return program;
|
|
}
|