new Pixelate()
Pixelate filter class
像素过滤器类
- Source:
- See:
-
- fabric.Image.filters.Pixelate#initialize for constructor definition
- ImageFilters demo
Example
var filter = new fabric.Image.filters.Pixelate({
blocksize: 8
});
object.filters.push(filter);
object.applyFilters();Extends
Members
fragmentSource
Fragment source for the Pixelate program
像素化程序的片段源
- Source:
type
Filter type
过滤器类型
- Overrides:
- Default Value:
- Pixelate
- Source:
Methods
applyTo(options)
Apply this filter to the input image data provided.
Determines whether to use WebGL or Canvas2D based on the options.webgl flag.
将此过滤器应用于所提供的输入图像数据。
根据选项确定是使用WebGL还是Canvas2D。webgl国旗。
Parameters:
| Name | Type | Description | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
options |
Object |
Properties
|
- Inherited From:
- Source:
applyTo2d(options)
Apply the Pixelate operation to a Uint8ClampedArray representing the pixels of an image.
将Pixelate操作应用到Uint8ClampedArray上，该数组表示图像的像素。
Parameters:
| Name | Type | Description | ||||||
|---|---|---|---|---|---|---|---|---|
options |
Object |
Properties
|
- Source:
applyToWebGL(options)
Apply this filter using webgl.
使用webgl应用这个过滤器。
Parameters:
| Name | Type | Description | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
options |
Object |
Properties
|
- Inherited From:
- Source:
createHelpLayer()
If needed by a 2d filter, this functions can create an helper canvas to be used
remember that options.targetCanvas is available for use till end of chain.
如果2d过滤器需要，这个函数可以创建一个要使用的辅助画布
记住这些选项。targetCanvas可以使用，直到链结束。
- Inherited From:
- Source:
createProgram(gl, fragmentSource, vertexSource)
Compile this filter's shader program.
编译这个过滤器的着色器程序。
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The GL canvas context to use for shader compilation.用于着色器编译的GL画布上下文。 |
fragmentSource |
String | fragmentShader source for compilationfragmentShader编译源 |
vertexSource |
String | vertexShader source for compilationvertexShader编译源 |
- Inherited From:
- Source:
getAttributeLocations(gl, program) → {Object}
Return a map of attribute names to WebGLAttributeLocation objects.
返回属性名映射到WebGLAttributeLocation对象。
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The canvas context used to compile the shader program.用于编译着色器程序的画布上下文。 |
program |
WebGLShaderProgram | The shader program from which to take attribute locations.着色器程序，从中获取属性位置。 |
- Inherited From:
- Source:
Returns:
A map of attribute names to attribute locations.
- Type
- Object
getUniformLocations(gl, program)
Return WebGL uniform locations for this filter's shader.
返回这个过滤器的着色器的WebGL统一位置。
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The GL canvas context used to compile this filter's shader.GL画布上下文用于编译这个过滤器的着色器。 |
program |
WebGLShaderProgram | This filter's compiled shader program.这个过滤器的编译着色程序。 |
- Overrides:
- Source:
initialize(optionsopt)
Constructor
构造函数
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
options |
Object |
<optional> |
Options object选择对象 |
- Inherited From:
- Source:
isNeutralState()
Indicate when the filter is not gonna apply changes to the image
指示什么时候滤镜不会对图像应用改变
- Overrides:
- Source:
retrieveShader(options)
Retrieves the cached shader.
检索缓存的着色器。
Parameters:
| Name | Type | Description | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
options |
Object |
Properties
|
- Inherited From:
- Source:
sendAttributeData(gl, attributeLocations)
Send attribute data from this filter to its shader program on the GPU.
将属性数据从这个过滤器发送到它在GPU上的着色程序。
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The canvas context used to compile the shader program.用于编译着色器程序的画布上下文。 |
attributeLocations |
Object | A map of shader attribute names to their locations.着色器属性名称到其位置的映射。 |
- Inherited From:
- Source:
sendUniformData(gl, uniformLocations)
Send data from this filter to its shader program's uniforms.
从这个过滤器发送数据到它的着色程序的制服。
Parameters:
| Name | Type | Description |
|---|---|---|
gl |
WebGLRenderingContext | The GL canvas context used to compile this filter's shader.GL画布上下文用于编译这个过滤器的着色器。 |
uniformLocations |
Object | A map of string uniform names to WebGLUniformLocation objects字符串统一名称到WebGLUniformLocation对象的映射 |
- Overrides:
- Source:
setOptions(optionsopt)
Sets filter's properties from options
从选项中设置过滤器的属性
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
options |
Object |
<optional> |
Options object选择对象 |
- Inherited From:
- Source:
toJSON() → {Object}
Returns a JSON representation of an instance
返回实例的JSON表示形式
- Inherited From:
- Source:
Returns:
JSON
- Type
- Object
toObject() → {Object}
Returns object representation of an instance
返回实例的对象表示形式
- Inherited From:
- Source:
Returns:
Object representation of an instance
- Type
- Object