org.lwjgl.opengles

Class QCOMFramebufferFoveated

java.lang.Object

org.lwjgl.opengles.QCOMFramebufferFoveated

public class QCOMFramebufferFoveated
extends java.lang.Object

Native bindings to the QCOM_framebuffer_foveated extension.

Foveated rendering is a technique that aims to reduce fragment processing workload and bandwidth by reducing the average resolution of a framebuffer. Perceived image quality is kept high by leaving the focal point of rendering at full resolution.

It exists in two major forms:

• Static foveated(lens matched) rendering: where the gaze point is fixed with a large fovea region and designed to match up with the lens characteristics.
• Eye-tracked foveated rendering: where the gaze point is continuously tracked by a sensor to allow a smaller fovea region (further reducing average resolution)

Traditionally foveated rendering involves breaking a framebuffer's area into smaller regions such as bins, tiles, viewports, or layers which are rendered to individually. Each of these regions has the geometry projected or scaled differently so that the net resolution of these layers is less than the original framebuffer's resolution. When these regions are mapped back to the original framebuffer, they create a rendered result with decreased quality as pixels get further from the focal point.

Foveated rendering is currently achieved by large modifications to an applications render pipelines to manually implement the required geometry amplifications, blits, and projection changes. This presents a large implementation cost to an application developer and is generally inefficient as it can not make use of a platforms unique hardware features or optimized software paths. This extension aims to address these problems by exposing foveated rendering in an explicit and vendor neutral way, and by providing an interface with minimal changes to how an application specifies its framebuffer.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_FOVEATION_ENABLE_BIT_QCOM Allowed in the config input in FramebufferFoveationConfigQCOM.
static int	GL_FOVEATION_SCALED_BIN_METHOD_BIT_QCOM Allowed in the config input in FramebufferFoveationConfigQCOM.

Method Summary

Modifier and Type	Method and Description
static void	glFramebufferFoveationConfigQCOM(int fbo, int numLayers, int focalPointsPerLayer, int requestedFeatures, int[] providedFeatures) Array version of: FramebufferFoveationConfigQCOM
static void	glFramebufferFoveationConfigQCOM(int fbo, int numLayers, int focalPointsPerLayer, int requestedFeatures, java.nio.IntBuffer providedFeatures)
static void	glFramebufferFoveationParametersQCOM(int fbo, int layer, int focalPoint, float focalX, float focalY, float gainX, float gainY, float foveaArea)
static void	nglFramebufferFoveationConfigQCOM(int fbo, int numLayers, int focalPointsPerLayer, int requestedFeatures, long providedFeatures)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GL_FOVEATION_ENABLE_BIT_QCOM

public static final int GL_FOVEATION_ENABLE_BIT_QCOM

Allowed in the config input in FramebufferFoveationConfigQCOM.

See Also:

Constant Field Values

GL_FOVEATION_SCALED_BIN_METHOD_BIT_QCOM

public static final int GL_FOVEATION_SCALED_BIN_METHOD_BIT_QCOM

Allowed in the config input in FramebufferFoveationConfigQCOM.

See Also:

Constant Field Values

Method Detail

nglFramebufferFoveationConfigQCOM

public static void nglFramebufferFoveationConfigQCOM(int fbo,
                                                     int numLayers,
                                                     int focalPointsPerLayer,
                                                     int requestedFeatures,
                                                     long providedFeatures)

glFramebufferFoveationConfigQCOM

public static void glFramebufferFoveationConfigQCOM(int fbo,
                                                    int numLayers,
                                                    int focalPointsPerLayer,
                                                    int requestedFeatures,
                                                    java.nio.IntBuffer providedFeatures)

glFramebufferFoveationParametersQCOM

public static void glFramebufferFoveationParametersQCOM(int fbo,
                                                        int layer,
                                                        int focalPoint,
                                                        float focalX,
                                                        float focalY,
                                                        float gainX,
                                                        float gainY,
                                                        float foveaArea)

glFramebufferFoveationConfigQCOM

public static void glFramebufferFoveationConfigQCOM(int fbo,
                                                    int numLayers,
                                                    int focalPointsPerLayer,
                                                    int requestedFeatures,
                                                    int[] providedFeatures)

Array version of: FramebufferFoveationConfigQCOM