epaper::ImageIO Class Reference

Utilities for loading/saving images and converting formats. More...

#include <image_io.hpp>

Classes
struct	ImageResult

Static Public Member Functions
static auto	load_image (std::string_view path, int desired_channels=0) -> std::expected< ImageResult, Error >
static auto	save_png (std::string_view path, std::size_t width, std::size_t height, int channels, std::span< const std::uint8_t > data) -> std::expected< void, Error >
template<FramebufferLike FB>
static auto	framebuffer_to_rgb (const FB &fb) -> std::vector< std::uint8_t >

Detailed Description

Utilities for loading/saving images and converting formats.

Static-only utility class - all methods are static, no instantiation needed.

Design Philosophy:

• Thin wrapper around stb_image library
• RAII: Automatic memory management for loaded images
• Type-safe: std::vector instead of raw pointers
• Error propagation: std::expected for I/O failures

See also

stb_image.h, stb_image_write.h (third_party)

Member Function Documentation

framebuffer_to_rgb()

template<FramebufferLike FB>

auto epaper::ImageIO::framebuffer_to_rgb ( const FB &  fb ) -> std::vector<std::uint8_t>

static

Examples

/mnt/nas/libepaper/include/epaper/core/display.hpp, and /mnt/nas/libepaper/include/epaper/io/image_io.hpp.

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load_image()

auto epaper::ImageIO::load_image ( std::string_view  path, int  desired_channels = 0  ) -> std::expected<ImageResult, Error>

static

Examples

/mnt/nas/libepaper/include/epaper/core/display.hpp, and /mnt/nas/libepaper/include/epaper/io/image_io.hpp.

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save_png()

auto epaper::ImageIO::save_png ( std::string_view  path, std::size_t  width, std::size_t  height, int  channels, std::span< const std::uint8_t >  data  ) -> std::expected<void, Error>

static

Examples

/mnt/nas/libepaper/include/epaper/core/display.hpp, and /mnt/nas/libepaper/include/epaper/io/image_io.hpp.

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The documentation for this class was generated from the following files:

• include/epaper/io/image_io.hpp
• src/image_io.cpp