Abstract: A method includes receiving a source shape that is to be blended with a destination shape stored in a color buffer for an image; in response to determining that the source shape is associated with a blending mode that requires updates to pixels in the color buffer uncovered by the source shape: identifying empty tiles in the color buffer uncovered by the source shape and non-empty tiles in the color buffer covered by the source shape; for each of the empty tiles, sending instructions to clear pixel values associated with the empty tile in the color buffer; and for each of the non-empty tiles: identifying pixels of the non-empty tile that are covered by the destination shape but not the source shape; and sending instructions to clear pixel values associated with the pixels.

Abstract: Systems and methods for occluding virtual objects in an augmented reality environment are described. A method includes generating a distance map associated with a physical object, determining a location of a virtual object in an artificial-reality environment, determining, based at least in part upon the distance map and the location of the virtual object, a first portion of the physical object that is closer than a first portion of the virtual object from the viewpoint of the user, determining a second portion of the virtual object that is not obscured by the physical object from the viewpoint of the user, and rendering a display image. The display image comprises a first set of pixels corresponding to the first portion of the physical object in a first state, and the display image comprises a second set of pixels corresponding to the second portion of the virtual object in a second state.

Abstract: A method is disclosed for receiving a synchronization signal from a display circuit configured to display a series of frames, each frame comprising a plurality of tiles of pixels, determining, based on the received synchronization signal, that the display circuit has consumed data corresponding to one or more tiles of a frame, identifying a predetermined number of tiles that are subsequent to the one or more tiles consumed by the display circuit based on the synchronization signal, determining that one or more tiles of the identified tiles require an update, selectively rendering the determined tiles, and transmitting the rendered tiles to the display circuit.

Abstract: A method is disclosed for receiving a synchronization signal from a display circuit configured to display a series of frames, each frame comprising a plurality of tiles of pixels, determining, based on the received synchronization signal, that the display circuit has consumed data corresponding to one or more tiles of a frame, identifying a predetermined number of tiles that are subsequent to the one or more tiles consumed by the display circuit based on the synchronization signal, determining that one or more tiles of the identified tiles require an update, selectively rendering the determined tiles, and transmitting the rendered tiles to the display circuit.

Abstract: In one embodiment, a method includes by one or more computing devices, accessing an image including a hand of a user of a head-mounted display at a first time. The method includes generating, from at least the image, a virtual object representation of the hand, defined in a virtual environment that includes at least one other virtual object. The method includes rendering a first image of the virtual environment comprising a first portion of the hand of the user at a first frame rate, and determining a second viewpoint of the user at a second time. The method includes rendering a second image of the virtual environment comprising a second portion of the hand of the user at a second frame rate. The method includes providing, to a set of light emitters of the head-mounted display, instructions to display the second image.

Abstract: In particular embodiments, a computing system of a device may determine a display peak power budget allocated for a display component of the device. The system may determine display information including display workload and display telemetry associated with the display component. The system may determine, in accordance with a display peak power management policy applied to the display peak power budget and the display information, one or more display-controlling parameters for maintaining the display component to operate within the display peak power budget. The system may determine, based on the one or more display-controlling parameters, a plurality of grayscales for a plurality of regions on a display screen of the device. The system may adjust a rendered frame based on the plurality of grayscales and output the adjusted rendered frame on the display screen of the device.

Abstract: A method includes receiving a source shape that is to be blended with a destination shape stored in a color buffer for an image; in response to determining that the source shape is associated with a blending mode that requires updates to pixels in the color buffer uncovered by the source shape: identifying empty tiles in the color buffer uncovered by the source shape and non-empty tiles in the color buffer covered by the source shape; for each of the empty tiles, sending instructions to clear pixel values associated with the empty tile in the color buffer; and for each of the non-empty tiles: identifying pixels of the non-empty tile that are covered by the destination shape but not the source shape; and sending instructions to clear pixel values associated with the pixels.

Abstract: A method includes receiving a list of primitives covering a tile of an image, the image comprising content defined by the list of primitives, and for each primitive in the list: identifying, in the tile, pixels that are partially covered by the primitive, pixels that are fully uncovered by the primitive, and pixels that are fully covered by the primitive; computing, for each of the partially-covered pixels, a coverage weight indicating a proportion of the partially-covered pixel that is covered by the primitive; storing coverage data in a coverage buffer corresponding to the tile, the coverage data comprising the coverage weights of the partially-covered pixels, fully-uncovered indicators for the fully-uncovered pixels, and fully-covered indicators for the fully-covered pixels; and determining color information for the primitive in the tile based on the stored coverage data. And, aggregating the color information of the list of primitives in a color buffer for output.

Abstract: In one embodiment, a method includes by one or more computing devices, accessing an image including a hand of a user of a head-mounted display at a first time. The method includes generating, from at least the image, a virtual object representation of the hand, defined in a virtual environment that includes at least one other virtual object. The method includes rendering a first image of the virtual environment comprising a first portion of the hand of the user at a first frame rate, and determining a second viewpoint of the user at a second time. The method includes rendering a second image of the virtual environment comprising a second portion of the hand of the user at a second frame rate. The method includes providing, to a set of light emitters of the head-mounted display, instructions to display the second image.

Abstract: In particular embodiments, a computing system of a device may determine a display peak power budget allocated for a display component of the device. The system may determine display information including display workload and display telemetry associated with the display component. The system may determine, in accordance with a display peak power management policy applied to the display peak power budget and the display information, one or more display-controlling parameters for maintaining the display component to operate within the display peak power budget. The system may determine, based on the one or more display-controlling parameters, a plurality of grayscales for a plurality of regions on a display screen of the device. The system may adjust a rendered frame based on the plurality of grayscales and output the adjusted rendered frame on the display screen of the device.

Abstract: This disclosure describes efficient communication of surface texture data between system on a chip (SOC) integrated circuits. An example system includes a first integrated circuit and a second integrated circuit communicatively coupled to the first integrated circuit by a video communication interface. The first integrated generates a superframe in a video frame of the video communication interface for transmission to the second integrated circuit. The superframe includes multiple subframe payloads that carry surface texture data to be updated in the frame and corresponding subframe headers that include parameters of the subframe payloads. The second integrated circuit includes a direct access memory (DMA) controller. The DMA upon receipt of the superframe, writes the surface texture data within each of the subframe payloads directly to an allocated location in memory based on the parameters included in the corresponding one of the subframe headers.

Abstract: In one embodiment, one or more computing devices access an image comprising at least a portion of a hand of a user of a head-mounted display and generate a planar representation of the hand and a height map associated with the planar representation. A first portion of the planar representation that is closer than a first portion of a virtual object to a viewpoint and a second portion of the planar representation that is farther than a second portion of the virtual object from the viewpoint is determined based on the height map and the virtual object. A display image is rendered from the viewpoint for display, the display image comprising a first set of pixels corresponding to the first portion of the planar representation and a second set of pixels corresponding to the second portion of the virtual object.

Abstract: This disclosure describes efficient communication of surface texture data between system on a chip (SOC) integrated circuits. An example system includes a first integrated circuit, and at least one second integrated circuit communicatively coupled to the first integrated circuit by a communication interface. The first integrated circuit, upon determining that surface texture data of a frame to be rendered for display by the second SoC integrated circuit is to be updated, (a) transmits the surface texture data in one or more update packets to the second integrated circuit using the communication interface, and (b) transmits a command to the second integrated circuit indicating that the surface texture data of the frame has been updated using the communication interface.

Abstract: This disclosure describes efficient communication of surface texture data between system on a chip (SOC) integrated circuits. An example system includes a first integrated circuit and a second integrated circuit communicatively coupled to the first integrated circuit by a video communication interface. The first integrated generates a superframe in a video frame of the video communication interface for transmission to the second integrated circuit. The superframe includes multiple subframe payloads that carry surface texture data to be updated in the frame and corresponding subframe headers that include parameters of the subframe payloads. The second integrated circuit includes a direct access memory (DMA) controller. The DMA upon receipt of the superframe, writes the surface texture data within each of the subframe payloads directly to an allocated location in memory based on the parameters included in the corresponding one of the subframe headers.

Abstract: In one embodiment, one or more computing devices access an image comprising at least a portion of a hand of a user of a head-mounted display and generate a planar representation of the hand and a height map associated with the planar representation. A first portion of the planar representation that is closer than a first portion of a virtual object to a viewpoint and a second portion of the planar representation that is farther than a second portion of the virtual object from the viewpoint is determined based on the height map and the virtual object. A display image is rendered from the viewpoint for display, the display image comprising a first set of pixels corresponding to the first portion of the planar representation and a second set of pixels corresponding to the second portion of the virtual object.

Abstract: This disclosure describes efficient communication of surface texture data between system on a chip (SOC) integrated circuits. An example system includes a first integrated circuit and a second integrated circuit communicatively coupled to the first integrated circuit by a video communication interface. The first integrated generates a superframe in a video frame of the video communication interface for transmission to the second integrated circuit. The superframe includes multiple subframe payloads that carry surface texture data to be updated in the frame and corresponding subframe headers that include parameters of the subframe payloads. The second integrated circuit includes a direct access memory (DMA) controller. The DMA upon receipt of the superframe, writes the surface texture data within each of the subframe payloads directly to an allocated location in memory based on the parameters included in the corresponding one of the subframe headers.

Abstract: In one embodiment, a method includes by one or more computing devices, accessing an image including a hand of a user of a head-mounted display. The method includes generating, from at least the image, a virtual object representation of the hand. The virtual object representation is defined in a virtual environment. The method includes rendering, based on the virtual object representation and at least one other virtual object in the virtual environment, an image of the virtual environment from a viewpoint of the user. The image includes a set of pixels that corresponds to a portion of the virtual object representation that is visible from the viewpoint of the user. The method includes providing, to a set of light emitters of the head-mounted display, instructions to display the image. The set of pixels in the image causes the light emitters at one or more positions to be unilluminated.

Abstract: In one embodiment, a method includes by one or more computing devices, accessing an image including a hand of a user of a head-mounted display. The method includes generating, from at least the image, a virtual object representation of the hand. The virtual object representation is defined in a virtual environment. The method includes rendering, based on the virtual object representation and at least one other virtual object in the virtual environment, an image of the virtual environment from a viewpoint of the user. The image includes a set of pixels that corresponds to a portion of the virtual object representation that is visible from the viewpoint of the user. The method includes providing, to a set of light emitters of the head-mounted display, instructions to display the image. The set of pixels in the image causes the light emitters at one or more positions to be unilluminated.

Abstract: This disclosure describes efficient communication of surface texture data between system on a chip (SOC) integrated circuits. An example system includes a first integrated circuit, and at least one second integrated circuit communicatively coupled to the first integrated circuit by a communication interface. The first integrated circuit, upon determining that surface texture data of a frame to be rendered for display by the second SoC integrated circuit is to be updated, (a) transmits the surface texture data in one or more update packets to the second integrated circuit using the communication interface, and (b) transmits a command to the second integrated circuit indicating that the surface texture data of the frame has been updated using the communication interface.

Abstract: This disclosure describes efficient communication of surface texture data between system on a chip (SOC) integrated circuits. An example system includes a first integrated circuit and a second integrated circuit communicatively coupled to the first integrated circuit by a video communication interface. The first integrated generates a superframe in a video frame of the video communication interface for transmission to the second integrated circuit. The superframe includes multiple subframe payloads that carry surface texture data to be updated in the frame and corresponding subframe headers that include parameters of the subframe payloads. The second integrated circuit includes a direct access memory (DMA) controller. The DMA upon receipt of the superframe, writes the surface texture data within each of the subframe payloads directly to an allocated location in memory based on the parameters included in the corresponding one of the subframe headers.