libfrif_common.cpp

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/*
 * This software was developed at the National Institute of Standards and
 * Technology (NIST) by employees of the Federal Government in the course
 * of their official duties. Pursuant to title 17 Section 105 of the
 * United States Code, this software is not subject to copyright protection
 * and is in the public domain. NIST assumes no responsibility whatsoever for
 * its use by other parties, and makes no guarantees, expressed or implied,
 * about its quality, reliability, or any other characteristic.
 */
 
#include <exception>
 
#include <frif/common.h>
 
FRIF::Coordinate::Coordinate(
    const uint32_t x_,
    const uint32_t y_) :
    x{x_},
    y{y_}
{
 
}
 
auto
FRIF::Coordinate::operator<=>(const FRIF::Coordinate&)
    const = default;
 
bool
FRIF::Coordinate::operator==(const FRIF::Coordinate&)
    const = default;
 
FRIF::ReturnStatus::operator bool()
    const
    noexcept
{
        return (this->result == Result::Success);
}
 
static std::string imagePropertiesString(const FRIF::Image &image)
{
        return {std::to_string(image.width) + 'x' +
            std::to_string(image.height) + ", colorspace = " +
            std::to_string(static_cast<std::underlying_type_t<
            FRIF::Image::Colorspace>>(image.colorspace)) + ", bpc = " +
            std::to_string(static_cast<std::underlying_type_t<
            FRIF::Image::BitsPerChannel>>(image.bpc)) + ", bpp = " +
            std::to_string(static_cast<std::underlying_type_t<
            FRIF::Image::BitsPerPixel>>(image.bpp))};
}
 
FRIF::Image::Image() = default;
FRIF::Image::Image(
    const uint8_t identifier_,
    const uint16_t width_,
    const uint16_t height_,
    const uint16_t ppi_,
    const Colorspace colorspace_,
    const BitsPerChannel bpc_,
    const BitsPerPixel bpp_,
    const std::vector<std::byte> &pixels_) :
    identifier{identifier_},
    width{width_},
    height{height_},
    ppi{ppi_},
    colorspace{colorspace_},
    bpc{bpc_},
    bpp{bpp_},
    pixels{pixels_}
{
 
}
 
void
FRIF::Image::sanityCheck()
    const
{
        if (this->width == 0 || this->height == 0)
                throw std::logic_error{"Unexpected dimensions (" +
                    imagePropertiesString(*this) + ')'};
 
        decltype(pixels.size()) expected{};
        switch (colorspace) {
        case Colorspace::Grayscale:
                switch (bpc) {
                case BitsPerChannel::Sixteen:
                        switch (bpp) {
                        case BitsPerPixel::Sixteen:
                                break;
 
                        case BitsPerPixel::Eight:
                                [[fallthrough]];
                        case BitsPerPixel::TwentyFour:
                                [[fallthrough]];
                        case BitsPerPixel::FortyEight:
                                throw std::logic_error{"Unexpected "
                                    "combination (" +
                                    imagePropertiesString(*this) + ')'};
                        }
 
                        expected = width * height * 2ul;
                        if (pixels.size() != expected)
                                throw std::logic_error{"Unexpected pixel "
                                    "length (expected = " +
                                    std::to_string(expected) +", actual = " +
                                    std::to_string(pixels.size()) + ')'};
 
                        return;
                case BitsPerChannel::Eight:
                        switch (bpp) {
                        case BitsPerPixel::Eight:
                                break;
 
                        case BitsPerPixel::Sixteen:
                                [[fallthrough]];
                        case BitsPerPixel::TwentyFour:
                                [[fallthrough]];
                        case BitsPerPixel::FortyEight:
                                throw std::logic_error{"Unexpected "
                                    "combination (" +
                                    imagePropertiesString(*this) + ')'};
                        }
 
                        expected = width * height;
                        if (pixels.size() != expected)
                                throw std::logic_error{"Unexpected pixel "
                                    "length (expected = " +
                                    std::to_string(expected) +", actual = " +
                                    std::to_string(this->pixels.size()) + ')'};
 
                        return;
                }
                break;
 
        case Colorspace::RGB:
                switch (bpc) {
                case BitsPerChannel::Sixteen:
                        switch (bpp) {
                        case BitsPerPixel::FortyEight:
                                break;
 
                        case BitsPerPixel::Eight:
                                [[fallthrough]];
                        case BitsPerPixel::Sixteen:
                                [[fallthrough]];
                        case BitsPerPixel::TwentyFour:
                                throw std::logic_error{"Unexpected "
                                    "combination (" +
                                    imagePropertiesString(*this) + ')'};
                        }
 
                        expected = width * height * (3ul * 2ul);
                        if (pixels.size() != expected)
                                throw std::logic_error{"Unexpected pixel "
                                    "length (expected = " +
                                    std::to_string(expected) +", actual = " +
                                    std::to_string(this->pixels.size()) + ')'};
 
                        return;
                case BitsPerChannel::Eight:
                        switch (bpp) {
                        case BitsPerPixel::TwentyFour:
                                break;
 
                        case BitsPerPixel::Eight:
                                [[fallthrough]];
                        case BitsPerPixel::Sixteen:
                                [[fallthrough]];
                        case BitsPerPixel::FortyEight:
                                throw std::logic_error{"Unexpected "
                                    "combination (" +
                                    imagePropertiesString(*this) + ')'};
                        }
 
                        expected = width * height * 3ul;
                        if (pixels.size() != expected)
                                throw std::logic_error{"Unexpected pixel "
                                    "length (expected = " +
                                    std::to_string(expected) +", actual = " +
                                    std::to_string(this->pixels.size()) + ')'};
 
                        return;
                }
                break;
        }
 
        throw std::logic_error{"Untested "
            "combination (" + imagePropertiesString(*this) + ')'};
}