Enum veloren_voxygen::ui::graphic::TextureRequirements

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enum TextureRequirements {
    Fixed {
        size: Vec2<u16>,
        border_color: Option<Rgba<f32>>,
    },
    Dependent,
}
Expand description

Requirements that a particular graphic has with respect to the atlas allocation or independent texture it will be stored in.

If this matches between an old graphic and a new one which is replacing it, we can reuse any of the corresponding locations where it is cached in textures on the GPU. That is we can invalidate such textures and upload the new graphic there, rather than needing to allocate a new texture (or new location in an atlas).

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Fixed

These are uploaded to the GPU in the original resolution of the image supplied by the Graphic and any scaling is done during sampling in the UI fragment shader.

Fields

§size: Vec2<u16>
§border_color: Option<Rgba<f32>>

Graphics with a border color specified are placed into their own individual textures so that the border color can be set there. (Note: this is partially a theoretical description as border color options are limited in the current graphics API).

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Dependent

These are rasterized to the exact resolution that they will be displayed at and then uploaded to the GPU. This corresponds to Graphic::Voxel. There may be multiple copies on the GPU if different resolutions are requested.

It is expected that the requested sizes will generally not differ when switching out a graphic. Thus, dependent cached depdendent should always be invalidated since those cached locations will be reusable if the requested size is the same.

Implementations§

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impl TextureRequirements

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fn from_graphic(graphic: &Graphic) -> Option<Self>

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fn to_key_and_tex_parameters( self, graphic_id: Id, requested_size: Vec2<u16>, ) -> (CacheKey, TextureParameters)

Trait Implementations§

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impl PartialEq for TextureRequirements

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fn eq(&self, other: &TextureRequirements) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for TextureRequirements

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