texture_data.h

// © Joseph Cameron - All Rights Reserved
 
#ifndef GDK_GFX_TEXTURE_DATA_H
#define GDK_GFX_TEXTURE_DATA_H
 
#include <gdk/texture.h>
 
#include <array>
#include <cstddef>
#include <memory>
 
namespace gdk::texture_data {
    using channel_type = unsigned char;
    using channel_data = std::vector<channel_type>;
    using encoded_byte = unsigned char;

    struct view {
        size_t width; 
        size_t height; 
        texture::format format; 
        const channel_type *data; 
    };
 
    /*/// \brief provides a pointer a contiguous list of channel data representing 3D texture
    struct view3d {
        size_t width; //!< number of texels wide
        size_t height; //!< number of texels tall
        size_t length; //!< number of texels long 
        texture::format format; //!< format of the data
        const channel_type *data; //!< ptr to the start of decoded texture data
    };*/

    std::pair<view, std::shared_ptr<channel_data>> make_from_png(
        const encoded_byte* aDataStart, const size_t aLength,
        const texture::format aFormat = texture::format::rgba );
    std::pair<view, std::shared_ptr<channel_data>> make_from_png(
        const std::vector<encoded_byte>& aPNGBuffer, const texture::format aFormat = texture::format::rgba );
    template <std::size_t N>
    std::pair<view, std::shared_ptr<channel_data>> make_from_png(
        const std::array<encoded_byte, N>& data, const texture::format aFormat = texture::format::rgba) {
        return make_from_png(data.data(), N, aFormat);
    }
}
 
#endif