Renderer (jMonkeyEngine3)

All Known Implementing Classes:

GLRenderer, NullRenderer
```
public interface Renderer
```
The Renderer is responsible for taking rendering commands and executing them on the underlying video hardware.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`applyRenderState(RenderState state)` Applies the given `RenderState`, making the necessary GL calls so that the state is applied.
`void`	`cleanup()` Deletes all previously used `Native Objects` on this Renderer, and then resets the native objects.
`void`	`clearBuffers(boolean color, boolean depth, boolean stencil)` Clears certain channels of the currently bound framebuffer.
`void`	`clearClipRect()` Clears the clipping rectangle set with `setClipRect(int, int, int, int)`.
`void`	`copyFrameBuffer(FrameBuffer src, FrameBuffer dst, boolean copyDepth)` Copies contents from src to dst, scaling if necessary.
`void`	`deleteBuffer(BufferObject bo)` Deletes the buffer object from the GPU.
`void`	`deleteBuffer(VertexBuffer vb)` Deletes a vertex buffer from the GPU.
`void`	`deleteFrameBuffer(FrameBuffer fb)` Deletes a framebuffer and all attached renderbuffers
`void`	`deleteImage(Image image)` Deletes a texture from the GPU.
`void`	`deleteShader(Shader shader)` Deletes a shader.
`void`	`deleteShaderSource(Shader.ShaderSource source)` Deletes the provided shader source.
`int[]`	`generateProfilingTasks(int numTasks)` Generates a pool of gpu queries meant to use as profiling tasks
`boolean`	`getAlphaToCoverage()` Gets the alpha to coverage state.
`java.util.EnumSet<Caps>`	`getCaps()` Get the capabilities of the renderer.
`int`	`getDefaultAnisotropicFilter()` Get the default anisotropic filter level for textures.
`java.util.EnumMap<Limits,java.lang.Integer>`	`getLimits()` Get the limits of the renderer.
`long`	`getProfilingTime(int taskId)` Returns the time in nano seconds elapsed for the task with the given id.
`Statistics`	`getStatistics()` The statistics allow tracking of how data per frame, such as number of objects rendered, number of triangles, etc.
`void`	`initialize()` Detects available capabilities of the GPU.
`void`	`invalidateState()` Invalidates the current rendering state.
`boolean`	`isTaskResultAvailable(int taskId)` Check if the profiling results are available
`void`	`modifyTexture(Texture tex, Image pixels, int x, int y)` Modify the given Texture with the given Image.
`void`	`postFrame()` Called when a new frame has been rendered.
`void`	`readFrameBuffer(FrameBuffer fb, java.nio.ByteBuffer byteBuf)` Reads the pixels currently stored in the specified framebuffer into the given ByteBuffer object.
`void`	`readFrameBufferWithFormat(FrameBuffer fb, java.nio.ByteBuffer byteBuf, Image.Format format)` Reads the pixels currently stored in the specified framebuffer into the given ByteBuffer object.
`void`	`renderMesh(Mesh mesh, int lod, int count, VertexBuffer[] instanceData)` Renders `count` meshes, with the geometry data supplied and per-instance data supplied.
`void`	`resetGLObjects()` Resets all previously used `Native Objects` on this Renderer.
`void`	`setAlphaToCoverage(boolean value)` Sets the alpha to coverage state.
`void`	`setBackgroundColor(ColorRGBA color)` Sets the background (aka clear) color.
`void`	`setClipRect(int x, int y, int width, int height)` Specifies a clipping rectangle.
`void`	`setDefaultAnisotropicFilter(int level)` Set the default anisotropic filter level for textures.
`void`	`setDepthRange(float start, float end)` Set the range of the depth values for objects.
`void`	`setFrameBuffer(FrameBuffer fb)` Sets the framebuffer that will be drawn to.
`void`	`setLinearizeSrgbImages(boolean linearize)` If enabled, all `images` with the `sRGB flag` set shall undergo an sRGB to linear RGB color conversion when read by a shader.
`void`	`setMainFrameBufferOverride(FrameBuffer fb)` Set the framebuffer that will be set instead of the main framebuffer when a call to setFrameBuffer(null) is made.
`void`	`setMainFrameBufferSrgb(boolean srgb)` If enabled, color values rendered to the main framebuffer undergo linear -> sRGB conversion.
`void`	`setShader(Shader shader)` Sets the shader to use for rendering.
`void`	`setTexture(int unit, Texture tex)` Sets the texture to use for the given texture unit.
`void`	`setViewPort(int x, int y, int width, int height)` Set the viewport location and resolution on the screen.
`void`	`startProfiling(int taskId)` Starts a time profiling task on the GPU.
`void`	`stopProfiling()` Will stop the last profiling task started with startProfiling
`void`	`updateBufferData(BufferObject bo)` Uploads data of the buffer object on the GPU.
`void`	`updateBufferData(VertexBuffer vb)` Uploads a vertex buffer to the GPU.

- Method Detail
  - initialize
```
void initialize()
```
    Detects available capabilities of the GPU. Must be called prior to any other Renderer methods.
  - getCaps
```
java.util.EnumSet<Caps> getCaps()
```
    Get the capabilities of the renderer.
    
    Returns:
    
    The capabilities of the renderer.
  - getLimits
```
java.util.EnumMap<Limits,java.lang.Integer> getLimits()
```
    Get the limits of the renderer.
    
    Returns:
    
    The limits of the renderer.
  - getStatistics
```
Statistics getStatistics()
```
    The statistics allow tracking of how data per frame, such as number of objects rendered, number of triangles, etc. These are updated when the Renderer's methods are used, make sure to call Statistics.clearFrame() at the appropriate time to get accurate info per frame.
  - invalidateState
```
void invalidateState()
```
    Invalidates the current rendering state. Should be called after the GL state was changed manually or through an external library.
  - clearBuffers
```
void clearBuffers(boolean color,
                  boolean depth,
                  boolean stencil)
```
    Clears certain channels of the currently bound framebuffer.
    
    Parameters:
    
    color - True if to clear colors (RGBA)
    
    depth - True if to clear depth/z
    
    stencil - True if to clear stencil buffer (if available, otherwise ignored)
  - setBackgroundColor
```
void setBackgroundColor(ColorRGBA color)
```
    Sets the background (aka clear) color.
    
    Parameters:
    
    color - The background color to set
  - applyRenderState
```
void applyRenderState(RenderState state)
```
    Applies the given RenderState, making the necessary GL calls so that the state is applied.
  - setDepthRange
```
void setDepthRange(float start,
                   float end)
```
    Set the range of the depth values for objects. All rendered objects will have their depth clamped to this range.
    
    Parameters:
    
    start - The range start
    
    end - The range end
  - postFrame
```
void postFrame()
```
    Called when a new frame has been rendered. Currently, this will simply delete any OpenGL objects from the GPU which have been garbage collected by the GC.
  - setViewPort
```
void setViewPort(int x,
                 int y,
                 int width,
                 int height)
```
    Set the viewport location and resolution on the screen.
    
    Parameters:
    
    x - The x coordinate of the viewport
    
    y - The y coordinate of the viewport
    
    width - Width of the viewport
    
    height - Height of the viewport
  - setClipRect
```
void setClipRect(int x,
                 int y,
                 int width,
                 int height)
```
    Specifies a clipping rectangle. For all future rendering commands, no pixels will be allowed to be rendered outside of the clip rectangle.
    
    Parameters:
    
    x - The x coordinate of the clip rect
    
    y - The y coordinate of the clip rect
    
    width - Width of the clip rect
    
    height - Height of the clip rect
  - clearClipRect
```
void clearClipRect()
```
    Clears the clipping rectangle set with setClipRect(int, int, int, int).
  - setShader
```
void setShader(Shader shader)
```
    Sets the shader to use for rendering. If the shader has not been uploaded yet, it is compiled and linked. If it has been uploaded, then the uniform data is updated and the shader is set.
    
    Parameters:
    
    shader - The shader to use for rendering.
  - deleteShader
```
void deleteShader(Shader shader)
```
    Deletes a shader. This method also deletes the attached shader sources.
    
    Parameters:
    
    shader - Shader to delete.
    
    See Also:
    
    deleteShaderSource(com.jme3.shader.Shader.ShaderSource)
  - deleteShaderSource
```
void deleteShaderSource(Shader.ShaderSource source)
```
    Deletes the provided shader source.
    
    Parameters:
    
    source - The ShaderSource to delete.
  - copyFrameBuffer
```
void copyFrameBuffer(FrameBuffer src,
                     FrameBuffer dst,
                     boolean copyDepth)
```
    Copies contents from src to dst, scaling if necessary. set copyDepth to false to only copy the color buffers.
  - setFrameBuffer
```
void setFrameBuffer(FrameBuffer fb)
```
    Sets the framebuffer that will be drawn to. If the framebuffer has not been initialized yet, it will be created and its render surfaces and attached textures will be allocated.
    
    Parameters:
    
    fb - The framebuffer to set
  - setMainFrameBufferOverride
```
void setMainFrameBufferOverride(FrameBuffer fb)
```
    Set the framebuffer that will be set instead of the main framebuffer when a call to setFrameBuffer(null) is made.
    
    Parameters:
    
    fb - The framebuffer to override the main framebuffer.
  - readFrameBuffer
```
void readFrameBuffer(FrameBuffer fb,
                     java.nio.ByteBuffer byteBuf)
```
    Reads the pixels currently stored in the specified framebuffer into the given ByteBuffer object. Only color pixels are transferred, the format is RGBA with 8 bits per component. The given byte buffer should have at least fb.getWidth() * fb.getHeight() * 4 bytes remaining.
    
    Parameters:
    
    fb - The framebuffer to read from
    
    byteBuf - The bytebuffer to transfer color data to
  - readFrameBufferWithFormat
```
void readFrameBufferWithFormat(FrameBuffer fb,
                               java.nio.ByteBuffer byteBuf,
                               Image.Format format)
```
    Reads the pixels currently stored in the specified framebuffer into the given ByteBuffer object. Only color pixels are transferred, with the given format. The given byte buffer should have at least fb.getWidth() * fb.getHeight() * 4 bytes remaining.
    
    Parameters:
    
    fb - The framebuffer to read from
    
    byteBuf - The bytebuffer to transfer color data to
    
    format - the image format to use when reading the frameBuffer.
  - deleteFrameBuffer
```
void deleteFrameBuffer(FrameBuffer fb)
```
    Deletes a framebuffer and all attached renderbuffers
  - setTexture
```
void setTexture(int unit,
                Texture tex)
```
    Sets the texture to use for the given texture unit.
  - modifyTexture
```
void modifyTexture(Texture tex,
                   Image pixels,
                   int x,
                   int y)
```
    Modify the given Texture with the given Image. The image will be put at x and y into the texture. NOTE: this is only supported for uncompressed 2D images without mipmaps.
    
    Parameters:
    
    tex - the Texture that will be modified
    
    pixels - the source Image data to copy data from
    
    x - the x position to put the image into the texture
    
    y - the y position to put the image into the texture
  - deleteImage
```
void deleteImage(Image image)
```
    Deletes a texture from the GPU.
  - updateBufferData
```
void updateBufferData(VertexBuffer vb)
```
    Uploads a vertex buffer to the GPU.
    
    Parameters:
    
    vb - The vertex buffer to upload
  - updateBufferData
```
void updateBufferData(BufferObject bo)
```
    Uploads data of the buffer object on the GPU.
    
    Parameters:
    
    bo - the buffer object to upload.
  - deleteBuffer
```
void deleteBuffer(VertexBuffer vb)
```
    Deletes a vertex buffer from the GPU.
    
    Parameters:
    
    vb - The vertex buffer to delete
  - deleteBuffer
```
void deleteBuffer(BufferObject bo)
```
    Deletes the buffer object from the GPU.
    
    Parameters:
    
    bo - the buffer object to delete.
  - renderMesh
```
void renderMesh(Mesh mesh,
                int lod,
                int count,
                VertexBuffer[] instanceData)
```
    Renders count meshes, with the geometry data supplied and per-instance data supplied. The shader which is currently set with setShader is responsible for transforming the input vertices into clip space and shading it based on the given vertex attributes. The integer variable gl_InstanceID can be used to access the current instance of the mesh being rendered inside the vertex shader. If the instance data is non-null, then it is submitted as a per-instance vertex attribute to the shader.
    
    Parameters:
    
    mesh - The mesh to render
    
    lod - The LOD level to use, see Mesh.setLodLevels(com.jme3.scene.VertexBuffer[]).
    
    count - Number of mesh instances to render
    
    instanceData - When count is greater than 1, these buffers provide the per-instance attributes.
  - resetGLObjects
```
void resetGLObjects()
```
    Resets all previously used Native Objects on this Renderer. The state of the native objects is reset in such way, that using them again will cause the renderer to reupload them. Call this method when you know the GL context is going to shutdown.
    
    See Also:
    
    NativeObject.resetObject()
  - cleanup
```
void cleanup()
```
    Deletes all previously used Native Objects on this Renderer, and then resets the native objects.
    
    See Also:
    
    resetGLObjects(), NativeObject.deleteObject(java.lang.Object)
  - setDefaultAnisotropicFilter
```
void setDefaultAnisotropicFilter(int level)
```
    Set the default anisotropic filter level for textures. If the texture anisotropic filter is set to 0, then the default level is used. Otherwise if the texture level is 1 or greater, then the texture's value overrides the default value.
    
    Parameters:
    
    level - The default anisotropic filter level to use. Default: 1.
    
    Throws:
    
    java.lang.IllegalArgumentException - If level is less than 1.
  - setAlphaToCoverage
```
void setAlphaToCoverage(boolean value)
```
    Sets the alpha to coverage state.
    When alpha coverage and multi-sampling is enabled, each pixel will contain alpha coverage in all of its subsamples, which is then combined when other future alpha-blended objects are rendered.
    
    Alpha-to-coverage is useful for rendering transparent objects without having to worry about sorting them.
  - setMainFrameBufferSrgb
```
void setMainFrameBufferSrgb(boolean srgb)
```
    If enabled, color values rendered to the main framebuffer undergo linear -> sRGB conversion. This is identical to FrameBuffer.setSrgb(boolean) except it is toggled for the main framebuffer instead of an offscreen buffer. This should be set together with setLinearizeSrgbImages(boolean) As a shorthand, the user can set AppSettings.setGammaCorrection(boolean) to true to toggle both setLinearizeSrgbImages(boolean) and setMainFrameBufferSrgb(boolean) if the Caps.Srgb is supported by the GPU.
    
    Throws:
    
    RendererException - If the GPU hardware does not support sRGB.
    
    See Also:
    
    FrameBuffer.setSrgb(boolean), Caps.Srgb
  - setLinearizeSrgbImages
```
void setLinearizeSrgbImages(boolean linearize)
```
    If enabled, all images with the sRGB flag set shall undergo an sRGB to linear RGB color conversion when read by a shader. The conversion is performed for the following formats: - Image.Format.RGB8 - Image.Format.RGBA8 - Image.Format.Luminance8 - Image.Format.Luminance8Alpha8 - Image.Format.DXT1 - Image.Format.DXT1A - Image.Format.DXT3 - Image.Format.DXT5 For all other formats, no conversion is performed. If this option is toggled at runtime, textures must be reloaded for the change to take effect.
    
    Parameters:
    
    linearize - If sRGB images undergo sRGB -> linear conversion prior to rendering.
    
    Throws:
    
    RendererException - If the GPU hardware does not support sRGB.
    
    See Also:
    
    Caps.Srgb
  - generateProfilingTasks
```
int[] generateProfilingTasks(int numTasks)
```
    Generates a pool of gpu queries meant to use as profiling tasks
    
    Parameters:
    
    numTasks - the number of task ids to generate
    
    Returns:
    
    an array of tasks ids.
  - startProfiling
```
void startProfiling(int taskId)
```
    Starts a time profiling task on the GPU. This will profile all operations called between startProfiling and stopProfiling
    
    Parameters:
    
    taskId - the id of the task to start profiling.
  - stopProfiling
```
void stopProfiling()
```
    Will stop the last profiling task started with startProfiling
  - getProfilingTime
```
long getProfilingTime(int taskId)
```
    Returns the time in nano seconds elapsed for the task with the given id. Note that the result may not be available right after stopProfiling has been called. You need to check if the result is available with isTaskResultAvailable. Also note that it's guaranteed that the result will be available on next frame. If you use getProfilingTime on the next frame you called stopProfiling, you don't need to check the result availability with isTaskResultAvailable
    
    Parameters:
    
    taskId - the id of the task given by startProfiling.
    
    Returns:
    
    the time in nano second of the profiling task with the given id.
  - isTaskResultAvailable
```
boolean isTaskResultAvailable(int taskId)
```
    Check if the profiling results are available
    
    Parameters:
    
    taskId - the id of the task provided by startProfiling
    
    Returns:
    
    true if the results of the task with the given task id are available.
  - getAlphaToCoverage
```
boolean getAlphaToCoverage()
```
    Gets the alpha to coverage state.
  - getDefaultAnisotropicFilter
```
int getDefaultAnisotropicFilter()
```
    Get the default anisotropic filter level for textures.

Interface Renderer

Method Summary

Method Detail

initialize

getCaps

getLimits

getStatistics

invalidateState

clearBuffers

setBackgroundColor

applyRenderState

setDepthRange

postFrame

setViewPort

setClipRect

clearClipRect

setShader

deleteShader

deleteShaderSource

copyFrameBuffer

setFrameBuffer

setMainFrameBufferOverride

readFrameBuffer

readFrameBufferWithFormat

deleteFrameBuffer

setTexture

modifyTexture

deleteImage

updateBufferData

updateBufferData

deleteBuffer

deleteBuffer

renderMesh

resetGLObjects

cleanup

setDefaultAnisotropicFilter

setAlphaToCoverage

setMainFrameBufferSrgb

setLinearizeSrgbImages

generateProfilingTasks

startProfiling

stopProfiling

getProfilingTime

isTaskResultAvailable

getAlphaToCoverage

getDefaultAnisotropicFilter