pub struct TextureManager {
next_id: u64,
metas: HashMap<TextureId, TextureMeta, RandomState>,
delta: TexturesDelta,
}
Expand description
Low-level manager for allocating textures.
Communicates with the painting subsystem using Self::take_delta
.
Fields§
§next_id: u64
§metas: HashMap<TextureId, TextureMeta, RandomState>
§delta: TexturesDelta
Implementations§
§impl TextureManager
impl TextureManager
pub fn alloc(
&mut self,
name: String,
image: ImageData,
options: TextureOptions,
) -> TextureId
pub fn alloc( &mut self, name: String, image: ImageData, options: TextureOptions, ) -> TextureId
Allocate a new texture.
The given name can be useful for later debugging.
The returned TextureId
will be TextureId::Managed
, with an index
starting from zero and increasing with each call to Self::alloc
.
The first texture you allocate will be TextureId::Managed(0) == TextureId::default()
and
MUST have a white pixel at (0,0) (crate::WHITE_UV
).
The texture is given a retain-count of 1
, requiring one call to Self::free
to free it.
pub fn set(&mut self, id: TextureId, delta: ImageDelta)
pub fn set(&mut self, id: TextureId, delta: ImageDelta)
Assign a new image to an existing texture, or update a region of it.
pub fn retain(&mut self, id: TextureId)
pub fn retain(&mut self, id: TextureId)
Increase the retain-count of the given texture.
For each time you call Self::retain
you must call Self::free
on additional time.
pub fn take_delta(&mut self) -> TexturesDelta
pub fn take_delta(&mut self) -> TexturesDelta
Take and reset changes since last frame.
These should be applied to the painting subsystem each frame.
pub fn meta(&self, id: TextureId) -> Option<&TextureMeta>
pub fn meta(&self, id: TextureId) -> Option<&TextureMeta>
Get meta-data about a specific texture.
pub fn allocated(&self) -> impl ExactSizeIterator
pub fn allocated(&self) -> impl ExactSizeIterator
Get meta-data about all allocated textures in some arbitrary order.
pub fn num_allocated(&self) -> usize
pub fn num_allocated(&self) -> usize
Total number of allocated textures.
Trait Implementations§
§impl Default for TextureManager
impl Default for TextureManager
§fn default() -> TextureManager
fn default() -> TextureManager
Auto Trait Implementations§
impl Freeze for TextureManager
impl RefUnwindSafe for TextureManager
impl Send for TextureManager
impl Sync for TextureManager
impl Unpin for TextureManager
impl UnwindSafe for TextureManager
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