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Add support for mipmap textures. (#5146)

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Adds support for mipmaps in the `glow` backend.

Should be possible to implement for `wgpu` in the future as well, but
requires a custom compute kernel.
This commit is contained in:
Christofer Nolander
2024-09-22 19:16:16 +02:00
committed by GitHub
parent 07ccf41bf9
commit 6f7b9b9b87
2 changed files with 39 additions and 7 deletions
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23
crates/epaint/src/textures.rs
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@@ -159,6 +159,16 @@ pub struct TextureOptions {
/// How to wrap the texture when the texture coordinates are outside the [0, 1] range.
pub wrap_mode: TextureWrapMode,
/// How to filter between texture mipmaps.
///
/// Mipmaps ensures textures look smooth even when the texture is very small and pixels are much
/// larger than individual texels.
///
/// # Notes
///
/// - This may not be available on all backends (currently only `egui_glow`).
pub mipmap_mode: Option<TextureFilter>,
}
impl TextureOptions {
@@ -167,6 +177,7 @@ impl TextureOptions {
magnification: TextureFilter::Linear,
minification: TextureFilter::Linear,
wrap_mode: TextureWrapMode::ClampToEdge,
mipmap_mode: None,
};
/// Nearest magnification and minification.
@@ -174,6 +185,7 @@ impl TextureOptions {
magnification: TextureFilter::Nearest,
minification: TextureFilter::Nearest,
wrap_mode: TextureWrapMode::ClampToEdge,
mipmap_mode: None,
};
/// Linear magnification and minification, but with the texture repeated.
@@ -181,6 +193,7 @@ impl TextureOptions {
magnification: TextureFilter::Linear,
minification: TextureFilter::Linear,
wrap_mode: TextureWrapMode::Repeat,
mipmap_mode: None,
};
/// Linear magnification and minification, but with the texture mirrored and repeated.
@@ -188,6 +201,7 @@ impl TextureOptions {
magnification: TextureFilter::Linear,
minification: TextureFilter::Linear,
wrap_mode: TextureWrapMode::MirroredRepeat,
mipmap_mode: None,
};
/// Nearest magnification and minification, but with the texture repeated.
@@ -195,6 +209,7 @@ impl TextureOptions {
magnification: TextureFilter::Nearest,
minification: TextureFilter::Nearest,
wrap_mode: TextureWrapMode::Repeat,
mipmap_mode: None,
};
/// Nearest magnification and minification, but with the texture mirrored and repeated.
@@ -202,7 +217,15 @@ impl TextureOptions {
magnification: TextureFilter::Nearest,
minification: TextureFilter::Nearest,
wrap_mode: TextureWrapMode::MirroredRepeat,
mipmap_mode: None,
};
pub const fn with_mipmap_mode(self, mipmap_mode: Option<TextureFilter>) -> Self {
Self {
mipmap_mode,
..self
}
}
}
impl Default for TextureOptions {