Enum cogl::FeatureID

#[non_exhaustive]
pub enum FeatureID {
    OglFeatureIdTextureNpotBasic,
    OglFeatureIdTextureNpotMipmap,
    OglFeatureIdTextureNpotRepeat,
    OglFeatureIdTextureNpot,
    OglFeatureIdTextureRectangle,
    OglFeatureIdTexture3d,
    OglFeatureIdGlsl,
    OglFeatureIdArbfp,
    OglFeatureIdOffscreen,
    OglFeatureIdOffscreenMultisample,
    OglFeatureIdOnscreenMultiple,
    OglFeatureIdUnsignedIntIndices,
    OglFeatureIdDepthRange,
    OglFeatureIdPointSprite,
    OglFeatureIdMapBufferForRead,
    OglFeatureIdMapBufferForWrite,
    OglFeatureIdMirroredRepeat,
    OglFeatureIdSwapBuffersEvent,
    OglFeatureIdGles2Context,
    OglFeatureIdDepthTexture,
    OglFeatureIdPresentationTime,
    OglFeatureIdFence,
    OglFeatureIdPerVertexPointSize,
    OglFeatureIdTextureRg,
    OglFeatureIdBufferAge,
    // some variants omitted
}

All the capabilities that can vary between different GPUs supported by Cogl. Applications that depend on any of these features should explicitly check for them using cogl_has_feature or cogl_has_features.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

OglFeatureIdTextureNpotBasic

The hardware supports non power of two textures, but you also need to check the FeatureID::OglFeatureIdTextureNpotMipmap and FeatureID::OglFeatureIdTextureNpotRepeat features to know if the hardware supports npot texture mipmaps or repeat modes other than PipelineWrapMode::ClampToEdge respectively.

OglFeatureIdTextureNpotMipmap

Mipmapping is supported in conjuntion with non power of two textures.

OglFeatureIdTextureNpotRepeat

Repeat modes other than PipelineWrapMode::ClampToEdge are supported by the hardware.

OglFeatureIdTextureNpot

Non power of two textures are supported by the hardware. This is a equivalent to the FeatureID::OglFeatureIdTextureNpotBasic, FeatureID::OglFeatureIdTextureNpotMipmap and FeatureID::OglFeatureIdTextureNpotRepeat features combined.

OglFeatureIdTextureRectangle

Support for rectangular textures with non-normalized texture coordinates.

OglFeatureIdTexture3d

3D texture support

OglFeatureIdGlsl

GLSL support

OglFeatureIdArbfp

ARBFP support

OglFeatureIdOffscreen

Offscreen rendering support

OglFeatureIdOffscreenMultisample

Multisample support for offscreen framebuffers

OglFeatureIdOnscreenMultiple

Multiple onscreen framebuffers supported.

OglFeatureIdUnsignedIntIndices

Set if IndicesType::Int is supported in Indices::new.

OglFeatureIdDepthRange

cogl_pipeline_set_depth_range support

OglFeatureIdPointSprite

Whether Pipeline::set_layer_point_sprite_coords_enabled is supported.

OglFeatureIdMapBufferForRead

Whether cogl_buffer_map is supported with CoglBufferAccess including read support.

OglFeatureIdMapBufferForWrite

Whether cogl_buffer_map is supported with CoglBufferAccess including write support.

OglFeatureIdMirroredRepeat

Whether PipelineWrapMode::MirroredRepeat is supported.

OglFeatureIdSwapBuffersEvent

Available if the window system supports reporting an event for swap buffer completions.

OglFeatureIdGles2Context

Whether creating new GLES2 contexts is suported.

OglFeatureIdDepthTexture

Whether Framebuffer support rendering the depth buffer to a texture.

OglFeatureIdPresentationTime

Whether frame presentation time stamps will be recorded in FrameInfo objects.

OglFeatureIdFence

OglFeatureIdPerVertexPointSize

Whether cogl_point_size_in can be used as an attribute to set a per-vertex point size.

OglFeatureIdTextureRg

Support for TextureComponents::Rg as the internal components of a texture.

OglFeatureIdBufferAge

Available if the age of Onscreen back buffers are tracked and so Onscreen::get_buffer_age can be expected to return age values other than 0.

Trait Implementations

impl Clone for FeatureID

fn clone(&self) -> FeatureID

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for FeatureID

impl Debug for FeatureID

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for FeatureID

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for FeatureID

impl Hash for FeatureID

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl Ord for FeatureID

fn cmp(&self, other: &FeatureID) -> Ordering

This method returns an Ordering between self and other.

#[must_use]

pub fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]

pub fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]

pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<FeatureID> for FeatureID

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

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &FeatureID) -> bool

This method tests for !=.

impl PartialOrd<FeatureID> for FeatureID

fn partial_cmp(&self, other: &FeatureID) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]

pub fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use]

pub fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]

pub fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]

pub fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for FeatureID

impl StructuralPartialEq for FeatureID