openmsx::PNG Namespace Reference

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.
void	saveRGBA (size_t width, std::span< const uint32_t * > rowPointers, const std::string &filename)
void	saveGrayscale (size_t width, std::span< const uint8_t * > 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 106 of file PNG.cc.

References openmsx::PixelOperations::getAmask(), openmsx::PixelOperations::getBmask(), openmsx::PixelOperations::getGmask(), SDLSurfacePtr::getLinePtr(), openmsx::PixelOperations::getRmask(), openmsx::PNG::PNGReadHandle::info, openmsx::PNG::PNGReadHandle::ptr, view::transform(), and xrange().

Referenced by openmsx::loadTexture().

saveGrayscale()

void openmsx::PNG::saveGrayscale	(	size_t	width,
		std::span< const uint8_t * >	rowPointers_,
		const std::string &	filename
	)

Definition at line 340 of file PNG.cc.

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

saveRGBA()

void openmsx::PNG::saveRGBA	(	size_t	width,
		std::span< const uint32_t * >	rowPointers,
		const std::string &	filename
	)

Definition at line 322 of file PNG.cc.

References SDLSurfacePtr::get(), openmsx::PixelOperations::getAmask(), openmsx::PixelOperations::getBmask(), openmsx::PixelOperations::getGmask(), SDLSurfacePtr::getLinePtr(), openmsx::PixelOperations::getRmask(), and xrange().

Referenced by openmsx::VisibleSurface::saveScreenshotGL(), and openmsx::PostProcessor::takeRawScreenShot().