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Showing content from http://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/getParameter below:

WebGLRenderingContext: getParameter() method - Web APIs

WebGLRenderingContext: getParameter() method

Baseline Widely available

Note: This feature is available in Web Workers.

The WebGLRenderingContext.getParameter() method of the WebGL API returns a value for the passed parameter name.

Syntax Parameters

pname: A GLenum specifying which parameter value to return. See below for possible values.

Return value

Depends on the parameter.

Parameter names WebGL 1

You can query the following pname parameters when using a WebGLRenderingContext.

Constant Returned type Description gl.ACTIVE_TEXTURE GLenum gl.ALIASED_LINE_WIDTH_RANGE Float32Array (with 2 elements) gl.ALIASED_POINT_SIZE_RANGE Float32Array (with 2 elements) gl.ALPHA_BITS GLint gl.ARRAY_BUFFER_BINDING WebGLBuffer gl.BLEND GLboolean gl.BLEND_COLOR Float32Array (with 4 values) gl.BLEND_DST_ALPHA GLenum gl.BLEND_DST_RGB GLenum gl.BLEND_EQUATION GLenum gl.BLEND_EQUATION_ALPHA GLenum gl.BLEND_EQUATION_RGB GLenum gl.BLEND_SRC_ALPHA GLenum gl.BLEND_SRC_RGB GLenum gl.BLUE_BITS GLint gl.COLOR_CLEAR_VALUE Float32Array (with 4 values) gl.COLOR_WRITEMASK sequence<GLboolean> (with 4 values) gl.COMPRESSED_TEXTURE_FORMATS Uint32Array Returns the compressed texture formats.

When using the WEBGL_compressed_texture_s3tc extension:

ext.COMPRESSED_RGB_S3TC_DXT1_EXT
ext.COMPRESSED_RGBA_S3TC_DXT1_EXT
ext.COMPRESSED_RGBA_S3TC_DXT3_EXT
ext.COMPRESSED_RGBA_S3TC_DXT5_EXT

When using the WEBGL_compressed_texture_s3tc_srgb extension:

ext.COMPRESSED_SRGB_S3TC_DXT1_EXT
ext.COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
ext.COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
ext.COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT

When using the WEBGL_compressed_texture_etc extension:

ext.COMPRESSED_R11_EAC
ext.COMPRESSED_SIGNED_R11_EAC
ext.COMPRESSED_RG11_EAC
ext.COMPRESSED_SIGNED_RG11_EAC
ext.COMPRESSED_RGB8_ETC2
ext.COMPRESSED_RGBA8_ETC2_EAC
ext.COMPRESSED_SRGB8_ETC2
ext.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
ext.COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
ext.COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2

When using the WEBGL_compressed_texture_pvrtc extension:

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

When using the WEBGL_compressed_texture_etc1 extension:

ext.COMPRESSED_RGB_ETC1_WEBGL

When using the WEBGL_compressed_texture_astc extension:

ext.COMPRESSED_RGBA_ASTC_4x4_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR
ext.COMPRESSED_RGBA_ASTC_5x4_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR
ext.COMPRESSED_RGBA_ASTC_5x5_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR
ext.COMPRESSED_RGBA_ASTC_6x5_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR
ext.COMPRESSED_RGBA_ASTC_6x6_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR
ext.COMPRESSED_RGBA_ASTC_8x5_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR
ext.COMPRESSED_RGBA_ASTC_8x6_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR
ext.COMPRESSED_RGBA_ASTC_8x8_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR
ext.COMPRESSED_RGBA_ASTC_10x5_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR
ext.COMPRESSED_RGBA_ASTC_10x6_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR
ext.COMPRESSED_RGBA_ASTC_10x6_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR
ext.COMPRESSED_RGBA_ASTC_10x10_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR
ext.COMPRESSED_RGBA_ASTC_12x10_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR
ext.COMPRESSED_RGBA_ASTC_12x12_KHR
ext.COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR

gl.CULL_FACE GLboolean gl.CULL_FACE_MODE GLenum gl.FRONT, gl.BACK or gl.FRONT_AND_BACK. See also cullFace gl.CURRENT_PROGRAM WebGLProgram or null See useProgram. gl.DEPTH_BITS GLint gl.DEPTH_CLEAR_VALUE GLfloat gl.DEPTH_FUNC GLenum gl.DEPTH_RANGE Float32Array (with 2 elements) gl.DEPTH_TEST GLboolean gl.DEPTH_WRITEMASK GLboolean gl.DITHER GLboolean gl.ELEMENT_ARRAY_BUFFER_BINDING WebGLBuffer gl.FRAMEBUFFER_BINDING WebGLFramebuffer or null null corresponds to a binding to the default framebuffer. See also bindFramebuffer. gl.FRONT_FACE GLenum gl.CW or gl.CCW. See also frontFace. gl.GENERATE_MIPMAP_HINT GLenum gl.FASTEST, gl.NICEST or gl.DONT_CARE. See also hint. gl.GREEN_BITS GLint gl.IMPLEMENTATION_COLOR_READ_FORMAT GLenum gl.IMPLEMENTATION_COLOR_READ_TYPE GLenum gl.LINE_WIDTH GLfloat gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS GLint gl.MAX_CUBE_MAP_TEXTURE_SIZE GLint gl.MAX_FRAGMENT_UNIFORM_VECTORS GLint gl.MAX_RENDERBUFFER_SIZE GLint gl.MAX_TEXTURE_IMAGE_UNITS GLint gl.MAX_TEXTURE_SIZE GLint gl.MAX_VARYING_VECTORS GLint gl.MAX_VERTEX_ATTRIBS GLint gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS GLint gl.MAX_VERTEX_UNIFORM_VECTORS GLint gl.MAX_VIEWPORT_DIMS Int32Array (with 2 elements) gl.PACK_ALIGNMENT GLint gl.POLYGON_OFFSET_FACTOR GLfloat gl.POLYGON_OFFSET_FILL GLboolean gl.POLYGON_OFFSET_UNITS GLfloat gl.RED_BITS GLint gl.RENDERBUFFER_BINDING WebGLRenderbuffer or null See bindRenderbuffer. gl.RENDERER string gl.SAMPLE_BUFFERS GLint gl.SAMPLE_COVERAGE_INVERT GLboolean gl.SAMPLE_COVERAGE_VALUE GLfloat gl.SAMPLES GLint gl.SCISSOR_BOX Int32Array (with 4 elements) gl.SCISSOR_TEST GLboolean gl.SHADING_LANGUAGE_VERSION string gl.STENCIL_BACK_FAIL GLenum gl.STENCIL_BACK_FUNC GLenum gl.STENCIL_BACK_PASS_DEPTH_FAIL GLenum gl.STENCIL_BACK_PASS_DEPTH_PASS GLenum gl.STENCIL_BACK_REF GLint gl.STENCIL_BACK_VALUE_MASK GLuint gl.STENCIL_BACK_WRITEMASK GLuint gl.STENCIL_BITS GLint gl.STENCIL_CLEAR_VALUE GLint gl.STENCIL_FAIL GLenum gl.STENCIL_FUNC GLenum gl.STENCIL_PASS_DEPTH_FAIL GLenum gl.STENCIL_PASS_DEPTH_PASS GLenum gl.STENCIL_REF GLint gl.STENCIL_TEST GLboolean gl.STENCIL_VALUE_MASK GLuint gl.STENCIL_WRITEMASK GLuint gl.SUBPIXEL_BITS GLint gl.TEXTURE_BINDING_2D WebGLTexture or null gl.TEXTURE_BINDING_CUBE_MAP WebGLTexture or null gl.UNPACK_ALIGNMENT GLint gl.UNPACK_COLORSPACE_CONVERSION_WEBGL GLenum gl.UNPACK_FLIP_Y_WEBGL GLboolean gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL GLboolean gl.VENDOR string gl.VERSION string gl.VIEWPORT Int32Array (with 4 elements) WebGL 2

You can query the following pname parameters when using a WebGL2RenderingContext.

WebGL extensions

You can query the following pname parameters when using WebGL extensions:

Examples

gl.getParameter(gl.DITHER);
gl.getParameter(gl.VERSION);
gl.getParameter(gl.VIEWPORT);

Specifications Browser compatibility See also

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