diff options
Diffstat (limited to 'files/zh-cn/web/api/webglrenderingcontext/disable/index.html')
-rw-r--r-- | files/zh-cn/web/api/webglrenderingcontext/disable/index.html | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/files/zh-cn/web/api/webglrenderingcontext/disable/index.html b/files/zh-cn/web/api/webglrenderingcontext/disable/index.html new file mode 100644 index 0000000000..c1717db568 --- /dev/null +++ b/files/zh-cn/web/api/webglrenderingcontext/disable/index.html @@ -0,0 +1,139 @@ +--- +title: WebGLRenderingContext.disable() +slug: Web/API/WebGLRenderingContext/disable +translation_of: Web/API/WebGLRenderingContext/disable +--- +<div>{{APIRef("WebGL")}}</div> + +<p>The <strong><code>WebGLRenderingContext.disable()</code></strong> method of the <a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a> disables specific WebGL capabilities for this context.</p> + +<h2 id="Syntax">Syntax</h2> + +<pre class="syntaxbox">void <var>gl</var>.disable(<var>cap</var>); +</pre> + +<h3 id="Parameters">Parameters</h3> + +<dl> + <dt><code>cap</code></dt> + <dd>A {{domxref("GLenum")}} specifying which WebGL capability to disable. Possible values:</dd> + <dd> + <table class="standard-table"> + <thead> + <tr> + <th scope="col">Constant</th> + <th scope="col">Description</th> + </tr> + </thead> + <tbody> + <tr> + <td><code>gl.BLEND</code></td> + <td>Deactivates blending of the computed fragment color values. See {{domxref("WebGLRenderingContext.blendFunc()")}}.</td> + </tr> + <tr> + <td><code>gl.CULL_FACE</code></td> + <td>Deactivates culling of polygons. See {{domxref("WebGLRenderingContext.cullFace()")}}.</td> + </tr> + <tr> + <td><code>gl.DEPTH_TEST</code></td> + <td>Deactivates depth comparisons and updates to the depth buffer. See {{domxref("WebGLRenderingContext.depthFunc()")}}.</td> + </tr> + <tr> + <td><code>gl.DITHER</code></td> + <td>Deactivates dithering of color components before they get written to the color buffer.</td> + </tr> + <tr> + <td><code>gl.POLYGON_OFFSET_FILL</code></td> + <td>Deactivates adding an offset to depth values of polygon's fragments. See {{domxref("WebGLRenderingContext.polygonOffset()")}}.</td> + </tr> + <tr> + <td><code>gl.SAMPLE_ALPHA_TO_COVERAGE</code></td> + <td>Deactivates the computation of a temporary coverage value determined by the alpha value.</td> + </tr> + <tr> + <td><code>gl.SAMPLE_COVERAGE</code></td> + <td>Deactivates ANDing the fragment's coverage with the temporary coverage value. See {{domxref("WebGLRenderingContext.sampleCoverage()")}}.</td> + </tr> + <tr> + <td><code>gl.SCISSOR_TEST</code></td> + <td>Deactivates the scissor test that discards fragments that are outside of the scissor rectangle. See {{domxref("WebGLRenderingContext.scissor()")}}.</td> + </tr> + <tr> + <td><code>gl.STENCIL_TEST</code></td> + <td>Deactivates stencil testing and updates to the stencil buffer. See {{domxref("WebGLRenderingContext.stencilFunc()")}}.</td> + </tr> + </tbody> + </table> + When using a {{domxref("WebGL2RenderingContext", "WebGL 2 context", "", 1)}}, the following values are available additionally: + + <table class="standard-table"> + <thead> + <tr> + <th scope="col">Constant</th> + <th scope="col">Description</th> + </tr> + </thead> + <tbody> + <tr> + <td><code>gl.RASTERIZER_DISCARD</code></td> + <td>Deactivates that primitives are discarded immediately before the rasterization stage, but after the optional transform feedback stage. <code>gl.clear()</code> commands are ignored.</td> + </tr> + </tbody> + </table> + </dd> +</dl> + +<h3 id="Return_value">Return value</h3> + +<p>None.</p> + +<h2 id="Examples">Examples</h2> + +<pre class="brush: js">gl.disable(gl.DITHER); +</pre> + +<p>To check if a capability is disabled, use the {{domxref("WebGLRenderingContext.isEnabled()")}} method:</p> + +<pre class="brush: js">gl.isEnabled(gl.DITHER); +// false +</pre> + +<h2 id="Specifications">Specifications</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + <tr> + <td>{{SpecName('WebGL', "#5.14.3", "disable")}}</td> + <td>{{Spec2('WebGL')}}</td> + <td>Initial definition for WebGL.</td> + </tr> + <tr> + <td>{{SpecName('OpenGL ES 2.0', "glDisable.xml", "glDisable")}}</td> + <td>{{Spec2('OpenGL ES 2.0')}}</td> + <td>Man page of the (similar) OpenGL ES 2.0 API.</td> + </tr> + <tr> + <td>{{SpecName('OpenGL ES 3.0', "glEnable.xhtml", "glDisable")}}</td> + <td>{{Spec2('OpenGL ES 3.0')}}</td> + <td>Man page of the (similar) OpenGL ES 3.0 API.</td> + </tr> + </tbody> +</table> + +<h2 id="Browser_compatibility">Browser compatibility</h2> + +<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p> + +<p>{{Compat("api.WebGLRenderingContext.disable")}}</p> + +<h2 id="See_also">See also</h2> + +<ul> + <li>{{domxref("WebGLRenderingContext.enable()")}}</li> + <li>{{domxref("WebGLRenderingContext.isEnabled()")}}</li> +</ul> |