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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2024 Red Hat, Inc.
*
* ppm_writer.cpp - PPM writer
*/
#include "ppm_writer.h"
#include <fstream>
#include <iostream>
#include <libcamera/formats.h>
#include <libcamera/pixel_format.h>
using namespace libcamera;
int PPMWriter::write(const char *filename,
const StreamConfiguration &config,
const Span<uint8_t> &data)
{
if (config.pixelFormat != formats::BGR888) {
std::cerr << "Only BGR888 output pixel format is supported ("
<< config.pixelFormat << " requested)" << std::endl;
return -EINVAL;
}
std::ofstream output(filename, std::ios::binary);
if (!output) {
std::cerr << "Failed to open ppm file: " << filename << std::endl;
return -EINVAL;
}
output << "P6" << std::endl
<< config.size.width << " " << config.size.height << std::endl
<< "255" << std::endl;
if (!output) {
std::cerr << "Failed to write the file header" << std::endl;
return -EINVAL;
}
const unsigned int rowLength = config.size.width * 3;
const char *row = reinterpret_cast<const char *>(data.data());
for (unsigned int y = 0; y < config.size.height; y++, row += config.stride) {
output.write(row, rowLength);
if (!output) {
std::cerr << "Failed to write image data at row " << y << std::endl;
return -EINVAL;
}
}
return 0;
}
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