|
/*
|
|
* 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 "resource-loader.hpp"
|
|
#include "stb/stb_image.h"
|
|
#include "resources/image.hpp"
|
|
#include <cstring>
|
|
#include <stdexcept>
|
|
#include <physfs.h>
|
|
|
|
template <>
|
|
image* resource_loader<image>::load(resource_manager* resource_manager, PHYSFS_File* file)
|
|
{
|
|
unsigned char* buffer;
|
|
int size;
|
|
int width;
|
|
int height;
|
|
int channels;
|
|
bool hdr;
|
|
void* pixels;
|
|
|
|
// Read input stream into buffer
|
|
size = static_cast<int>(PHYSFS_fileLength(file));
|
|
buffer = new unsigned char[size];
|
|
PHYSFS_readBytes(file, buffer, size);
|
|
|
|
// Determine if image is in an HDR format
|
|
hdr = (stbi_is_hdr_from_memory(buffer, size) != 0);
|
|
|
|
// Set vertical flip on load in order to upload pixels correctly to OpenGL
|
|
stbi_set_flip_vertically_on_load(true);
|
|
|
|
// Load image data
|
|
if (hdr)
|
|
{
|
|
pixels = stbi_loadf_from_memory(buffer, size, &width, &height, &channels, 0);
|
|
}
|
|
else
|
|
{
|
|
pixels = stbi_load_from_memory(buffer, size, &width, &height, &channels, 0);
|
|
}
|
|
|
|
// Free file buffer
|
|
delete[] buffer;
|
|
|
|
// Check if image was loaded
|
|
if (!pixels)
|
|
{
|
|
throw std::runtime_error("STBI failed to load image from memory.");
|
|
}
|
|
|
|
::image* image = new ::image();
|
|
image->format(static_cast<unsigned int>(channels), hdr);
|
|
image->resize(static_cast<unsigned int>(width), static_cast<unsigned int>(height));
|
|
std::memcpy(image->get_pixels(), pixels, width * height * channels * ((hdr) ? sizeof(float) : sizeof(unsigned char)));
|
|
|
|
// Free loaded image data
|
|
stbi_image_free(pixels);
|
|
|
|
return image;
|
|
}
|
|
|