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Showing content from https://developers.google.com/vr/reference/android/com/google/vr/ndk/base/Frame below:

Frame | Google VR | Google for Developers

Frame

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Single frame acquired from the swap chain. The frame contains one or more buffers that are drawn by the application and are then composited and lens distorted by the SDK.

Public Methods void bindBuffer

(int bufferIndex)

Binds a pixel buffer that is part of the frame to the OpenGL framebuffer.

void getBufferSize

(int bufferIndex,

Point

sizeOut)

Returns the dimensions of the pixel buffer with the specified index.

int getFramebufferObject

(int bufferIndex)

Gets the name (ID) of the framebuffer object associated with the specified buffer.

void submit

(

BufferViewportList

viewportList, float[] headSpaceFromStartSpace)

Submits the frame for lens distortion and display on the screen.

void unbind

()

Unbinds any buffers bound from this frame and binds the default OpenGL framebuffer

Inherited Methods From class java.lang.Object boolean final Class<?>

getClass()

int

hashCode()

final void

notify()

final void

notifyAll()

String

toString()

final void

wait(long arg0, int arg1)

final void

wait(long arg0)

final void

wait()

Public Methods public void bindBuffer (int bufferIndex)

Binds a pixel buffer that is part of the frame to the OpenGL framebuffer.

Parameters bufferIndex Index of the GVR buffer to bind. public void getBufferSize (int bufferIndex, Point sizeOut)

Returns the dimensions of the pixel buffer with the specified index.

Note: A frame that was acquired before resizing a swap chain buffer will not be resized until it is submitted to the swap chain.

Parameters bufferIndex Index of the pixel buffer to inspect. sizeOut The (output) dimensions of the specified buffer. public int getFramebufferObject (int bufferIndex)

Gets the name (ID) of the framebuffer object associated with the specified buffer. The OpenGL state is not modified.

Parameters bufferIndex Index of the associated GVR buffer. Returns

OpenGL object name (ID) of a framebuffer object which can be used to render into the buffer. The ID is valid only until the frame is submitted.

public void submit (BufferViewportList viewportList, float[] headSpaceFromStartSpace)

Submits the frame for lens distortion and display on the screen.

Note: On Cardboard devices, this method makes OpenGL commands in the current thread's GL context; this can affect various GL state such as texture bindings, depth testing, backface culling, and blending.

Parameters viewportList List of mappings between regions of buffers in the frame and the viewer's field of view. headSpaceFromStartSpace the 4x4, column-major transform with which the frame was rendered, representing the transform from start space (space with head at the origin at last tracking reset) to head space (space with head at the origin and axes aligned to the view vector). This should typically be the transform returned by getHeadSpaceFromStartSpaceTransform(float[], long). public void unbind ()

Unbinds any buffers bound from this frame and binds the default OpenGL framebuffer

Last updated 2024-10-09 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-10-09 UTC."],[[["`Frame` objects manage buffers used for VR rendering and display."],["These buffers can be bound to OpenGL for drawing and then submitted for lens distortion and display."],["The `Frame` class provides methods to access buffer properties, such as size and framebuffer object ID."],["Before submission, viewport mapping and head tracking information must be specified."],["After use, `Frame` objects should be unbound to restore the default OpenGL framebuffer."]]],["The `Frame` class manages buffers for drawing and display. Key actions include: `bindBuffer` to connect a buffer to the OpenGL framebuffer, `getBufferSize` to retrieve buffer dimensions, and `getFramebufferObject` to obtain the associated framebuffer ID. The `submit` method processes the frame for display, applying lens distortion. Finally, `unbind` releases any bound buffers, reverting to the default OpenGL framebuffer. The class also include inherited methods from `Object`.\n"]]

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