Struct ugli_webgl::WEBGL_compressed_texture_pvrtc

pub struct WEBGL_compressed_texture_pvrtc(_);

Extension

This extension exposes the compressed texture formats defined in the IMG_texture_compression_pvrtc OpenGL extension to WebGL. Compression formats COMPRESSED_RGB_PVRTC_4BPPV1_IMG, COMPRESSED_RGB_PVRTC_2BPPV1_IMG, COMPRESSED_RGBA_PVRTC_4BPPV1_IMG, and COMPRESSED_RGBA_PVRTC_2BPPV1_IMG may be passed to the compressedTexImage2D and compressedTexSubImage2D entry points. Calling getParameter with the argument COMPRESSED_TEXTURE_FORMATS will include the 4 formats from this specification.

The following format-specific restrictions apply to all of the formats described by this extension:

In compressedTexImage2D, the width and height parameters must be powers of two. Otherwise, an INVALID_VALUE error is generated.

In compressedTexSubImage2D, the width and height parameters must be equal to the current values of the existing texture image, and the xoffset and yoffset parameters must be zero. Otherwise, an INVALID_VALUE error is generated.

The following format-specific restrictions must also be enforced: COMPRESSED_RGB_PVRTC_4BPPV1_IMG COMPRESSED_RGBA_PVRTC_4BPPV1_IMG

The byteLength of the ArrayBufferView, pixels, passed to either compressedTexImage2D or compressedTexSubImage2D must be equal to the following number of bytes:

max(width, 8) * max(height, 8) / 2

If it is not, an INVALID_VALUE error is generated. COMPRESSED_RGB_PVRTC_2BPPV1_IMG COMPRESSED_RGBA_PVRTC_2BPPV1_IMG

The byteLength of the ArrayBufferView, pixels, passed to either compressedTexImage2D or compressedTexSubImage2D must be equal to the following number of bytes:

max(width, 16) * max(height, 8) / 4

If it is not, an INVALID_VALUE error is generated.

Methods

impl WEBGL_compressed_texture_pvrtc

pub const COMPRESSED_RGBA_PVRTC_2BPPV1_IMG: GLenum

pub const COMPRESSED_RGBA_PVRTC_4BPPV1_IMG: GLenum

pub const COMPRESSED_RGB_PVRTC_2BPPV1_IMG: GLenum

pub const COMPRESSED_RGB_PVRTC_4BPPV1_IMG: GLenum

Trait Implementations

impl AsRef<Reference> for WEBGL_compressed_texture_pvrtc

fn as_ref(&self) -> &Reference

Performs the conversion.

impl Clone for WEBGL_compressed_texture_pvrtc

fn clone(&self) -> WEBGL_compressed_texture_pvrtc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WEBGL_compressed_texture_pvrtc

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

Formats the value using the given formatter.

impl Extension for WEBGL_compressed_texture_pvrtc

const NAME: &'static str

impl From<WEBGL_compressed_texture_pvrtc> for Reference

fn from(value: WEBGL_compressed_texture_pvrtc) -> Self

Performs the conversion.

impl InstanceOf for WEBGL_compressed_texture_pvrtc

fn instance_of(_reference: &Reference) -> bool

Checks whenever a given Reference if of type Self.

impl JsSerialize for WEBGL_compressed_texture_pvrtc

impl JsSerializeOwned for WEBGL_compressed_texture_pvrtc

fn into_js_owned<'_a>(value: &'_a mut Option<Self>) -> SerializedValue<'_a>

impl<'_r> JsSerializeOwned for &'_r WEBGL_compressed_texture_pvrtc

fn into_js_owned<'_a>(value: &'_a mut Option<Self>) -> SerializedValue<'_a>

impl ReferenceType for WEBGL_compressed_texture_pvrtc

unsafe fn from_reference_unchecked(reference: Reference) -> Self

Converts a given reference into a concrete reference-like wrapper. Doesn't do any type checking; highly unsafe to use!

impl<'_r> TryFrom<&'_r Reference> for WEBGL_compressed_texture_pvrtc

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(reference: &Reference) -> Result<Self, Self::Error>

Performs the conversion.

impl<'_r> TryFrom<&'_r Value> for WEBGL_compressed_texture_pvrtc

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: &Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Reference> for WEBGL_compressed_texture_pvrtc

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(reference: Reference) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for WEBGL_compressed_texture_pvrtc

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<WEBGL_compressed_texture_pvrtc> for Reference

type Error = Void

The type returned in the event of a conversion error.

fn try_from(value: WEBGL_compressed_texture_pvrtc) -> Result<Self, Self::Error>

Performs the conversion.