StelTexture::StelTextureParams Struct Reference

Contains the parameters defining how a texture is created. More...

#include <StelTexture.hpp>

Public Member Functions
	StelTextureParams (bool qgenerateMipmaps=false, GLint afiltering=GL_LINEAR, GLint awrapMode=GL_CLAMP_TO_EDGE, bool qfilterMipmaps=false, int decimateBy=1, bool allowHttp2=true)

Data Fields
bool	generateMipmaps
	Define if mipmaps must be created.
bool	filterMipmaps
	If true, mipmapped textures are filtered with GL_LINEAR_MIPMAP_LINEAR instead of GL_LINEAR_MIPMAP_NEAREST (i.e. More...
GLint	filtering
	Define the scaling filter to use. Must be one of GL_NEAREST or GL_LINEAR.
GLint	wrapMode
	Define the wrapping mode to use. Must be one of GL_CLAMP_TO_EDGE, or GL_REPEAT.
int	decimation
	Allow a reduction of the size of the texture image (useful for very limited hardware) The image size will be divided by this factor (e.g. More...
bool	allowHttp2
	Allow the use of HTTP/2 when loading this texture. More...

Detailed Description

Contains the parameters defining how a texture is created.

Field Documentation

allowHttp2

bool StelTexture::StelTextureParams::allowHttp2

Allow the use of HTTP/2 when loading this texture.

If set to false, HTTP/1.1 will be used by Qt, limiting maximum concurrency of downloads to 6 and avoiding HTTP 420 error when we abort many downloads at once. The error is due to CVE-2023-44487, but our use case is when a HiPS is downloading many tiles that then go out of the viewport before the download is completed.

decimation

int StelTexture::StelTextureParams::decimation

Allow a reduction of the size of the texture image (useful for very limited hardware) The image size will be divided by this factor (e.g.

2, 3, 4, ...)

filterMipmaps

bool StelTexture::StelTextureParams::filterMipmaps

If true, mipmapped textures are filtered with GL_LINEAR_MIPMAP_LINEAR instead of GL_LINEAR_MIPMAP_NEAREST (i.e.

enabling "trilinear" filtering)