WebGLRenderingContext.texParameter[fi]()

WebGL API 的WebGLRenderingContext.texParameter[fi]()方法用于设置纹理参数.

语法

void gl.texParameterf(GLenum target, GLenum pname, GLfloat param);
void gl.texParameteri(GLenum target, GLenum pname, GLint param);

target

GLenum 指定绑定点(目标)。可能的值：

gl.TEXTURE_2D: 二维纹理.
gl.TEXTURE_CUBE_MAP: 立方体纹理.
当使用 WebGL 2 context 时,还可以使用以下值
- gl.TEXTURE_3D: 三维贴图.
- gl.TEXTURE_2D_ARRAY: 二维数组贴图.

pname 参数是 Glenum 指定要设置的纹理参数. param 参数是 GLfloat 或 GLint 已指定的 pname参数的值。

`pname`	描述	`参数`
Available in WebGL 1
`gl.TEXTURE_MAG_FILTER`	纹理放大滤波器	`gl.LINEAR` (默认值), `gl.NEAREST`.
`gl.TEXTURE_MIN_FILTER`	纹理缩小滤波器	`gl.LINEAR`, `gl.NEAREST`, `gl.NEAREST_MIPMAP_NEAREST`, `gl.LINEAR_MIPMAP_NEAREST`, `gl.NEAREST_MIPMAP_LINEAR` (默认值), `gl.LINEAR_MIPMAP_LINEAR`.
`gl.TEXTURE_WRAP_S`	纹理坐标水平填充 `s`	`gl.REPEAT` (默认值),`gl.CLAMP_TO_EDGE`, `gl.MIRRORED_REPEAT`.
`gl.TEXTURE_WRAP_T`	纹理坐标垂直填充 `t`	`gl.REPEAT` (默认值),`gl.CLAMP_TO_EDGE`, `gl.MIRRORED_REPEAT`.
Additionally available when using the `EXT_texture_filter_anisotropic` extension
`ext.TEXTURE_MAX_ANISOTROPY_EXT`	纹理最大向异性	`GLfloat` 值.
Additionally available when using a WebGL 2 context
`gl.TEXTURE_BASE_LEVEL`	纹理映射等级	任何整型值.
`gl.TEXTURE_COMPARE_FUNC`	纹理对比函数	`gl.LEQUAL` (默认值), `gl.GEQUAL`, `gl.LESS`, `gl.GREATER`, `gl.EQUAL`, `gl.NOTEQUAL`, `gl.ALWAYS`, `gl.NEVER`.
`gl.TEXTURE_COMPARE_MODE`	纹理对比模式	`gl.NONE` (默认值), `gl.COMPARE_REF_TO_TEXTURE`.
`gl.TEXTURE_MAX_LEVEL`	最大纹理映射数组等级	任何整型值.
`gl.TEXTURE_MAX_LOD`	纹理最大细节层次值	任何整型值.
`gl.TEXTURE_MIN_LOD`	纹理最小细节层次值	任何浮点型值.
`gl.TEXTURE_WRAP_R`	纹理坐标`r`包装功能	`gl.REPEAT` (默认值), `gl.CLAMP_TO_EDGE`, `gl.MIRRORED_REPEAT`.

INVALID_ENUM target不是合法的值。

INVALID_OPRATION 当前目标上没有绑定纹理对象。

gl.texParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_NEAREST);

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`texParameterf`	Chrome Full support 9	Edge Full support 12	Firefox Full support 4	IE Full support 11	Opera Full support 12	Safari Full support 5.1	WebView Android Full support Yes	Chrome Android Full support 25	Firefox Android Full support Yes	Opera Android Full support 12	Safari iOS Full support 8	Samsung Internet Android Full support 1.5
`WebGL2`	Chrome Full support 56	Edge Full support 79	Firefox Full support 51	IE No support No	Opera Full support 43	Safari No support No	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android Full support 51	Opera Android Full support 43	Safari iOS No support No	Samsung Internet Android Full support 7.0