Utility functions to hide the complexity of saving to a PNG file. More...

Classes
struct	PNGReadHandle

struct	PNGWriteHandle

Functions
SDLSurfacePtr	load (const std::string &filename, bool want32bpp)
	Load the given PNG file in a SDL_Surface. More...

void	save (size_t width, std::span< const void * > rowPointers, const PixelFormat &format, const std::string &filename)

void	save (size_t width, std::span< const void * > rowPointers, const std::string &filename)

void	saveGrayscale (size_t width, std::span< const void * > rowPointers, const std::string &filename)

Detailed Description

Utility functions to hide the complexity of saving to a PNG file.

Function Documentation

◆ load()

SDLSurfacePtr openmsx::PNG::load	(	const std::string &	filename,
		bool	want32bpp
	)

Load the given PNG file in a SDL_Surface.

This SDL_Surface is either 24bpp or 32bpp, depending on whether the PNG file had an alpha layer. But it's possible to force a 32bpp surface. The surface will use RGB(A) or BGR(A) format depending on the current display format.

Definition at line 98 of file PNG.cc.

References Endian::BIG, Math::e, SDLSurfacePtr::getLinePtr(), openmsx::PNG::PNGReadHandle::info, openmsx::PNG::PNGReadHandle::ptr, std::swap(), VLA, and xrange().

Referenced by openmsx::AmdFlash::AmdFlash(), openmsx::SDLVisibleSurfaceBase::createSurface(), and openmsx::loadEnum().

◆ save() [1/2]

void openmsx::PNG::save	(	size_t	width,
		std::span< const void * >	rowPointers,
		const PixelFormat &	format,
		const std::string &	filename
	)

Definition at line 379 of file PNG.cc.

◆ save() [2/2]

void openmsx::PNG::save	(	size_t	width,
		std::span< const void * >	rowPointers,
		const std::string &	filename
	)

Definition at line 394 of file PNG.cc.

◆ saveGrayscale()

void openmsx::PNG::saveGrayscale	(	size_t	width,
		std::span< const void * >	rowPointers,
		const std::string &	filename
	)

Definition at line 400 of file PNG.cc.

Referenced by openmsx::Paper::save().