java.lang.Object
- com.jogamp.opengl.util.glsl.ShaderState

```
public final class ShaderState
extends Object
```
ShaderState allows to sharing data between shader programs, while updating the attribute and uniform locations when switching.
This allows seamless switching of programs using almost same data but performing different artifacts.

A used ShaderState is attached to the current GL context and can be retrieved via #getShaderState(GL).

Field Summary

Fields
Modifier and Type Field Description

static boolean DEBUG

Constructor Summary

Constructors
Constructor Description

ShaderState()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`attachObject(String name, Object obj)`	Attach user object for the given name to this ShaderState.
`boolean`	`attachShaderProgram(GL2ES2 gl, ShaderProgram prog, boolean enable)`	Attach or switch a shader program
`void`	`bindAttribLocation(GL2ES2 gl, int location, GLArrayData data)`	Binds a shader `GLArrayData` attribute to a location.
`void`	`bindAttribLocation(GL2ES2 gl, int location, String name)`	Binds a shader attribute to a location.
`void`	`destroy(GL2ES2 gl)`	Calls `release(gl, true, true, true)`
`Object`	`detachObject(String name)`
`void`	`disableAllVertexAttributeArrays(GL2ES2 gl, boolean removeFromState)`	Disables all vertex attribute arrays.
`boolean`	`disableVertexAttribArray(GL2ES2 gl, GLArrayData data)`	Disables a vertex attribute array This method uses the `GLArrayData`'s location if set and is the preferred alternative to `disableVertexAttribArray(GL2ES2, String)`.
`boolean`	`disableVertexAttribArray(GL2ES2 gl, String name)`	Disables a vertex attribute array This method retrieves the the location via `getAttribLocation(GL2ES2, GLArrayData)` hence `disableVertexAttribArray(GL2ES2, GLArrayData)` shall be preferred.
`boolean`	`enableVertexAttribArray(GL2ES2 gl, GLArrayData data)`	Enables a vertex attribute array, usually invoked by `GLArrayDataEditable.enableBuffer(GL, boolean)`.
`boolean`	`enableVertexAttribArray(GL2ES2 gl, String name)`	Enables a vertex attribute array.
`Object`	`getAttachedObject(String name)`	Returns the attached user object for the given name to this ShaderState.
`int`	`getAttribLocation(GL2ES2 gl, GLArrayData data)`	Validates and returns the location of a shader attribute. Uses either the cached value `getCachedAttribLocation(String)` if valid, or the GLSL queried via `GL2ES2.glGetAttribLocation(int, String)`. The location will be cached and set in the `GLArrayData` object.
`int`	`getAttribLocation(GL2ES2 gl, String name)`	Gets the location of a shader attribute with given `name`. Uses either the cached value `getCachedAttribLocation(String)` if valid, or the GLSL queried via `GL2ES2.glGetAttribLocation(int, String)`. The location will be cached.
`GLArrayData`	`getAttribute(String name)`	Get the previous cached vertex attribute data.
`int`	`getCachedAttribLocation(String name)`	Gets the cached location of a shader attribute.
`int`	`getCachedUniformLocation(String name)`	Gets the cached location of the shader uniform.
`GLUniformData`	`getUniform(String name)`	Get the uniform data, previously set.
`int`	`getUniformLocation(GL2ES2 gl, GLUniformData data)`	Validates and returns the location of a shader uniform. Uses either the cached value `getCachedUniformLocation(String)` if valid, or the GLSL queried via `GL2ES2.glGetUniformLocation(int, String)`. The location will be cached and set in the `GLUniformData` object.
`int`	`getUniformLocation(GL2ES2 gl, String name)`	Gets the location of a shader uniform with given `name`. Uses either the cached value `getCachedUniformLocation(String)` if valid, or the GLSL queried via `GL2ES2.glGetUniformLocation(int, String)`. The location will be cached.
`boolean`	`inUse()`
`boolean`	`isActiveAttribute(GLArrayData attribute)`
`boolean`	`isVertexAttribArrayEnabled(GLArrayData data)`
`boolean`	`isVertexAttribArrayEnabled(String name)`
`boolean`	`linked()`
`void`	`ownAttribute(GLArrayData attribute, boolean own)`	Binds or unbinds the `GLArrayData` lifecycle to this ShaderState.
`boolean`	`ownsAttribute(GLArrayData attribute)`
`boolean`	`ownsUniform(GLUniformData uniform)`
`void`	`ownUniform(GLUniformData uniform)`	Bind the `GLUniform` lifecycle to this ShaderState.
`void`	`release(GL2ES2 gl, boolean destroyBoundAttributes, boolean destroyShaderProgram, boolean destroyShaderCode)`
`void`	`releaseAllAttributes(GL2ES2 gl)`	Releases all mapped vertex attribute data, disables all enabled attributes and loses all indices
`void`	`releaseAllData(GL2ES2 gl)`	Calls `release(gl, false, false, false)`
`void`	`releaseAllUniforms(GL2ES2 gl)`	Releases all mapped uniform data and loses all indices
`void`	`setVerbose(boolean v)`
`ShaderProgram`	`shaderProgram()`
`String`	`toString()`
`StringBuilder`	`toString(StringBuilder sb, boolean alsoUnlocated)`
`boolean`	`uniform(GL2ES2 gl, GLUniformData data)`	Set the uniform data, if it's location is valid, i.e.
`void`	`useProgram(GL2ES2 gl, boolean on)`	Turns the shader program on or off.
`boolean`	`verbose()`
`boolean`	`vertexAttribPointer(GL2ES2 gl, GLArrayData data)`	Set the `GLArrayData` vertex attribute data, if it's location is valid, i.e.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - DEBUG
```
public static final boolean DEBUG
```
- Constructor Detail
  - ShaderState
```
public ShaderState()
```
- Method Detail
  - verbose
```
public boolean verbose()
```
  - setVerbose
```
public void setVerbose(boolean v)
```
  - getAttachedObject
```
public final Object getAttachedObject(String name)
```
    Returns the attached user object for the given name to this ShaderState.
  - attachObject
```
public final Object attachObject(String name,
                                 Object obj)
```
    Attach user object for the given name to this ShaderState. Returns the previously set object or null.
    
    Returns:
    
    the previous mapped object or null if none
  - detachObject
```
public final Object detachObject(String name)
```
    Parameters:
    
    name - name of the mapped object to detach
    
    Returns:
    
    the previous mapped object or null if none
  - useProgram
```
public void useProgram(GL2ES2 gl,
                       boolean on)
                throws GLException
```
    Turns the shader program on or off.
    
    Throws:
    
    GLException - if no program is attached
    
    See Also:
    
    useProgram(GL2ES2, boolean)
  - linked
```
public boolean linked()
```
  - inUse
```
public boolean inUse()
```
  - attachShaderProgram
```
public boolean attachShaderProgram(GL2ES2 gl,
                                   ShaderProgram prog,
                                   boolean enable)
                            throws GLException
```
    Attach or switch a shader program
    Attaching a shader program the first time, as well as switching to another program on the fly, while managing all attribute and uniform data.
    
    [Re]sets all data and use program in case of a program switch.
    
    Use program, useProgram(GL2ES2, boolean), if enable is true.
    
    Returns:
    
    true if shader program was attached, otherwise false (already attached)
    
    Throws:
    
    GLException - if program was not linked and linking fails
  - shaderProgram
```
public ShaderProgram shaderProgram()
```
  - destroy
```
public void destroy(GL2ES2 gl)
```
    Calls release(gl, true, true, true)
    
    See Also:
    
    #glReleaseAllVertexAttributes, #glReleaseAllUniforms, release(GL2ES2, boolean, boolean, boolean)
  - releaseAllData
```
public void releaseAllData(GL2ES2 gl)
```
    Calls release(gl, false, false, false)
    
    See Also:
    
    #glReleaseAllVertexAttributes, #glReleaseAllUniforms, release(GL2ES2, boolean, boolean, boolean)
  - release
```
public void release(GL2ES2 gl,
                    boolean destroyBoundAttributes,
                    boolean destroyShaderProgram,
                    boolean destroyShaderCode)
```
    See Also:
    
    #glReleaseAllVertexAttributes, #glReleaseAllUniforms, ShaderProgram.release(GL2ES2, boolean)
  - getCachedAttribLocation
```
public int getCachedAttribLocation(String name)
```
    Gets the cached location of a shader attribute.
    
    Returns:
    
    -1 if there is no such attribute available, otherwise >= 0
    
    See Also:
    
    bindAttribLocation(GL2ES2, int, String), bindAttribLocation(GL2ES2, int, GLArrayData), getAttribLocation(GL2ES2, String), GL2ES2.glGetAttribLocation(int, String)
  - getAttribute
```
public GLArrayData getAttribute(String name)
```
    Get the previous cached vertex attribute data.
    
    Returns:
    
    the GLArrayData object, null if not previously set.
    
    See Also:
    
    ownAttribute(GLArrayData, boolean), #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer, #glReleaseAllVertexAttributes, #glResetAllVertexAttributes, ShaderProgram#glReplaceShader
  - isActiveAttribute
```
public boolean isActiveAttribute(GLArrayData attribute)
```
  - ownAttribute
```
public void ownAttribute(GLArrayData attribute,
                         boolean own)
```
    Binds or unbinds the GLArrayData lifecycle to this ShaderState.
    If an attribute location is cached (ie bindAttribLocation(GL2ES2, int, String)) it is promoted to the GLArrayData instance.
    
    The attribute will be destroyed with destroy(GL2ES2) and it's location will be reset when switching shader with #attachShaderProgram(GL2ES2, ShaderProgram).
    
    The data will not be transfered to the GPU, use vertexAttribPointer(GL2ES2, GLArrayData) additionally.
    
    The data will also be associated with this ShaderState.
    
    Parameters:
    
    attribute - the GLArrayData which lifecycle shall be managed
    
    own - true if owning shall be performs, false if disowning.
    
    See Also:
    
    bindAttribLocation(GL2ES2, int, String), getAttribute(String), GLArrayData.associate(Object, boolean)
  - ownsAttribute
```
public boolean ownsAttribute(GLArrayData attribute)
```
  - bindAttribLocation
```
public void bindAttribLocation(GL2ES2 gl,
                               int location,
                               String name)
```
    Binds a shader attribute to a location. Multiple names can be bound to one location. The value will be cached and can be retrieved via getCachedAttribLocation(String) before or after linking.
    
    Throws:
    
    GLException - if no program is attached
    
    GLException - if the program is already linked
    
    See Also:
    
    GL2ES2.glBindAttribLocation(int, int, String), getAttribLocation(GL2ES2, String), getCachedAttribLocation(String)
  - bindAttribLocation
```
public void bindAttribLocation(GL2ES2 gl,
                               int location,
                               GLArrayData data)
```
    Binds a shader GLArrayData attribute to a location. Multiple names can be bound to one location. The value will be cached and can be retrieved via getCachedAttribLocation(String) and getAttribute(String)before or after linking. The GLArrayData's location will be set as well.
    
    Throws:
    
    GLException - if no program is attached
    
    GLException - if the program is already linked
    
    See Also:
    
    GL2ES2.glBindAttribLocation(int, int, String), getAttribLocation(GL2ES2, String), getCachedAttribLocation(String), getAttribute(String)
  - getAttribLocation
```
public int getAttribLocation(GL2ES2 gl,
                             String name)
```
    Gets the location of a shader attribute with given name.
    Uses either the cached value getCachedAttribLocation(String) if valid, or the GLSL queried via GL2ES2.glGetAttribLocation(int, String).
    The location will be cached.
    
    Returns:
    
    -1 if there is no such attribute available, otherwise >= 0
    
    Throws:
    
    GLException - if no program is attached
    
    GLException - if the program is not linked and no location was cached.
    
    See Also:
    
    getCachedAttribLocation(String), bindAttribLocation(GL2ES2, int, GLArrayData), bindAttribLocation(GL2ES2, int, String), GL2ES2.glGetAttribLocation(int, String)
  - getAttribLocation
```
public int getAttribLocation(GL2ES2 gl,
                             GLArrayData data)
```
    Validates and returns the location of a shader attribute.
    Uses either the cached value getCachedAttribLocation(String) if valid, or the GLSL queried via GL2ES2.glGetAttribLocation(int, String).
    The location will be cached and set in the GLArrayData object.
    
    Returns:
    
    -1 if there is no such attribute available, otherwise >= 0
    
    Throws:
    
    GLException - if no program is attached
    
    GLException - if the program is not linked and no location was cached.
    
    See Also:
    
    getCachedAttribLocation(String), bindAttribLocation(GL2ES2, int, GLArrayData), bindAttribLocation(GL2ES2, int, String), GL2ES2.glGetAttribLocation(int, String), getAttribute(String)
  - isVertexAttribArrayEnabled
```
public final boolean isVertexAttribArrayEnabled(String name)
```
    Returns:
    
    true if the named attribute is enable
  - isVertexAttribArrayEnabled
```
public final boolean isVertexAttribArrayEnabled(GLArrayData data)
```
    Returns:
    
    true if the GLArrayData attribute is enable
  - enableVertexAttribArray
```
public boolean enableVertexAttribArray(GL2ES2 gl,
                                       String name)
```
    Enables a vertex attribute array. This method retrieves the the location via getAttribLocation(GL2ES2, GLArrayData) hence enableVertexAttribArray(GL2ES2, GLArrayData) shall be preferred. Even if the attribute is not found in the current shader, it is marked enabled in this state.
    
    Returns:
    
    false, if the name is not found, otherwise true
    
    Throws:
    
    GLException - if the program is not linked and no location was cached.
    
    See Also:
    
    #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer
  - enableVertexAttribArray
```
public boolean enableVertexAttribArray(GL2ES2 gl,
                                       GLArrayData data)
```
    Enables a vertex attribute array, usually invoked by GLArrayDataEditable.enableBuffer(GL, boolean). This method uses the GLArrayData's location if set and is the preferred alternative to enableVertexAttribArray(GL2ES2, String). If data location is unset it will be retrieved via getAttribLocation(GL2ES2, GLArrayData) set and cached in this state. Even if the attribute is not found in the current shader, it is marked enabled in this state.
    
    Returns:
    
    false, if the name is not found, otherwise true
    
    Throws:
    
    GLException - if the program is not linked and no location was cached.
    
    See Also:
    
    #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer, GLArrayDataEditable.enableBuffer(GL, boolean)
  - disableVertexAttribArray
```
public boolean disableVertexAttribArray(GL2ES2 gl,
                                        String name)
```
    Disables a vertex attribute array This method retrieves the the location via getAttribLocation(GL2ES2, GLArrayData) hence disableVertexAttribArray(GL2ES2, GLArrayData) shall be preferred. Even if the attribute is not found in the current shader, it is removed from this state enabled list.
    
    Returns:
    
    false, if the name is not found, otherwise true
    
    Throws:
    
    GLException - if no program is attached
    
    GLException - if the program is not linked and no location was cached.
    
    See Also:
    
    #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer
  - disableVertexAttribArray
```
public boolean disableVertexAttribArray(GL2ES2 gl,
                                        GLArrayData data)
```
    Disables a vertex attribute array This method uses the GLArrayData's location if set and is the preferred alternative to disableVertexAttribArray(GL2ES2, String). If data location is unset it will be retrieved via getAttribLocation(GL2ES2, GLArrayData) set and cached in this state. Even if the attribute is not found in the current shader, it is removed from this state enabled list.
    
    Returns:
    
    false, if the name is not found, otherwise true
    
    Throws:
    
    GLException - if no program is attached
    
    GLException - if the program is not linked and no location was cached.
    
    See Also:
    
    #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer
  - vertexAttribPointer
```
public boolean vertexAttribPointer(GL2ES2 gl,
                                   GLArrayData data)
```
    Set the GLArrayData vertex attribute data, if it's location is valid, i.e. ≥ 0.
    This method uses the GLArrayData's location if valid, i.e. ≥ 0.
    If data's location is invalid, it will be retrieved via getAttribLocation(GL2ES2, GLArrayData), set and cached in this state.
    
    Returns:
    
    false, if the location could not be determined, otherwise true
    
    Throws:
    
    GLException - if no program is attached
    
    GLException - if the program is not linked and no location was cached.
    
    See Also:
    
    #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer
  - releaseAllAttributes
```
public void releaseAllAttributes(GL2ES2 gl)
```
    Releases all mapped vertex attribute data, disables all enabled attributes and loses all indices
    
    See Also:
    
    #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer, #glReleaseAllVertexAttributes, #glResetAllVertexAttributes, #glResetAllVertexAttributes, ShaderProgram#glReplaceShader
  - disableAllVertexAttributeArrays
```
public void disableAllVertexAttributeArrays(GL2ES2 gl,
                                            boolean removeFromState)
```
    Disables all vertex attribute arrays. Their enabled stated will be removed from this state only if 'removeFromState' is true. This method purpose is more for debugging.
    
    See Also:
    
    #glEnableVertexAttribArray, #glDisableVertexAttribArray, #glVertexAttribPointer, #getVertexAttribPointer, #glReleaseAllVertexAttributes, #glResetAllVertexAttributes, #glResetAllVertexAttributes, ShaderProgram#glReplaceShader
  - getCachedUniformLocation
```
public final int getCachedUniformLocation(String name)
```
    Gets the cached location of the shader uniform.
    
    Returns:
    
    -1 if there is no such uniform available, otherwise >= 0
  - ownUniform
```
public void ownUniform(GLUniformData uniform)
```
    Bind the GLUniform lifecycle to this ShaderState.
    If a uniform location is cached it is promoted to the GLUniformData instance.
    
    The attribute will be destroyed with destroy(GL2ES2) and it's location will be reset when switching shader with #attachShaderProgram(GL2ES2, ShaderProgram).
    
    The data will not be transfered to the GPU, use uniform(GL2ES2, GLUniformData) additionally.
    
    Parameters:
    
    uniform - the GLUniformData which lifecycle shall be managed
    
    See Also:
    
    getUniform(String)
  - ownsUniform
```
public boolean ownsUniform(GLUniformData uniform)
```
  - getUniformLocation
```
public final int getUniformLocation(GL2ES2 gl,
                                    String name)
```
    Gets the location of a shader uniform with given name.
    Uses either the cached value getCachedUniformLocation(String) if valid, or the GLSL queried via GL2ES2.glGetUniformLocation(int, String).
    The location will be cached.
    The current shader program (#attachShaderProgram(GL2ES2, ShaderProgram)) must be in use (useProgram(GL2ES2, boolean)) !
    
    Returns:
    
    -1 if there is no such attribute available, otherwise >= 0
    
    Throws:
    
    GLException - is the program is not linked
    
    See Also:
    
    #glGetUniformLocation, GL2ES2.glGetUniformLocation(int, java.lang.String), getUniformLocation(com.jogamp.opengl.GL2ES2, java.lang.String), ShaderProgram#glReplaceShader
  - getUniformLocation
```
public int getUniformLocation(GL2ES2 gl,
                              GLUniformData data)
```
    Validates and returns the location of a shader uniform.
    Uses either the cached value getCachedUniformLocation(String) if valid, or the GLSL queried via GL2ES2.glGetUniformLocation(int, String).
    The location will be cached and set in the GLUniformData object.
    The current shader program (#attachShaderProgram(GL2ES2, ShaderProgram)) must be in use (useProgram(GL2ES2, boolean)) !
    
    Returns:
    
    -1 if there is no such attribute available, otherwise >= 0
    
    Throws:
    
    GLException - is the program is not linked
    
    See Also:
    
    #glGetUniformLocation, GL2ES2.glGetUniformLocation(int, java.lang.String), getUniformLocation(com.jogamp.opengl.GL2ES2, java.lang.String), ShaderProgram#glReplaceShader
  - uniform
```
public boolean uniform(GL2ES2 gl,
                       GLUniformData data)
```
    Set the uniform data, if it's location is valid, i.e. ≥ 0.
    This method uses the GLUniformData's location if valid, i.e. ≥ 0.
    If data's location is invalid, it will be retrieved via getUniformLocation(GL2ES2, GLUniformData), set and cached in this state.
    
    Returns:
    
    false, if the location could not be determined, otherwise true
    
    See Also:
    
    #glGetUniformLocation, GL2ES2.glGetUniformLocation(int, java.lang.String), GL2ES2.glUniform(com.jogamp.opengl.GLUniformData), getUniformLocation(com.jogamp.opengl.GL2ES2, java.lang.String), ShaderProgram#glReplaceShader
  - getUniform
```
public GLUniformData getUniform(String name)
```
    Get the uniform data, previously set.
    
    Returns:
    
    the GLUniformData object, null if not previously set.
  - releaseAllUniforms
```
public void releaseAllUniforms(GL2ES2 gl)
```
    Releases all mapped uniform data and loses all indices
  - toString
```
public StringBuilder toString(StringBuilder sb,
                              boolean alsoUnlocated)
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class ShaderState

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEBUG

Constructor Detail

ShaderState

Method Detail

verbose

setVerbose

getAttachedObject

attachObject

detachObject

useProgram

linked

inUse

attachShaderProgram

shaderProgram

destroy

releaseAllData

release

getCachedAttribLocation

getAttribute

isActiveAttribute

ownAttribute

ownsAttribute

bindAttribLocation

bindAttribLocation

getAttribLocation

getAttribLocation

isVertexAttribArrayEnabled

isVertexAttribArrayEnabled

enableVertexAttribArray

enableVertexAttribArray

disableVertexAttribArray

disableVertexAttribArray

vertexAttribPointer

releaseAllAttributes

disableAllVertexAttributeArrays

getCachedUniformLocation

ownUniform

ownsUniform

getUniformLocation

getUniformLocation

uniform

getUniform

releaseAllUniforms

toString

toString