WEBGL_compressed_texture_pvrtc

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WEBGL_compressed_texture_pvrtc 扩展属于 WebGL API and exposes four PVRTC compressed texture formats .

Compressed textures reduce the amount of memory needed to store a texture on the GPU, allowing for higher resolution textures or more of the same resolution textures.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also 使用扩展在 WebGL 教程 .

可用性： PVRTC is typically only available on mobile devices with PowerVR chipsets. It is used in all generations of the iPhone, iPod Touch and iPad and supported on certain Android devices that use a PowerVR GPU.

This extension is available to both, WebGL1 and WebGL2 上下文。

注意 : On iOS devices, this extension is named WEBKIT_WEBGL_compressed_texture_pvrtc .

常量

The compressed texture formats are exposed by four constants and can be used in two functions: compressedTexImage2D() (where the height and width parameters must be powers of 2) and compressedTexSubImage2D() (where the the height and width parameters must equal the current values of the existing texture and the xoffset and yoffset parameters must be 0).

ext.COMPRESSED_RGB_PVRTC_4BPPV1_IMG
ext.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG
ext.COMPRESSED_RGB_PVRTC_2BPPV1_IMG
ext.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG

范例

var ext = gl.getExtension('WEBGL_compressed_texture_pvrtc');
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, ext.COMPRESSED_RGB_PVRTC_4BPPV1_IMG, 512, 512, 0, textureData);

规范

规范	状态	注释
WEBGL_compressed_texture_pvrtc The definition of 'WEBGL_compressed_texture_pvrtc' in that specification.	草案	初始定义。

浏览器兼容性

更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`WEBGL_compressed_texture_pvrtc`	Chrome Yes	Edge 79	Firefox 18 18 不支持 ? — 58 Prefixed Prefixed Implemented with the vendor prefix: MOZ_	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android ?	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes

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常量

范例

规范

浏览器兼容性

图例

另请参阅

元数据

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