Virtual surface compaction
First Claim
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1. A method implemented by a computing device, the method comprising:
- writing one or more visuals as composition elements including bitmaps and associated compositional metadata by the computing device to a plurality of virtual composition surfaces, each virtual composition surface comprising one or more logical composition surfaces representative of individual surfaces as seen by an application running on the computing device;
tracking a plurality of valid regions by the computing device within the virtual composition surfaces comprising one or more current visuals;
determining that a valid region of the plurality of valid regions of a first virtual composition surface of the plurality of virtual composition surfaces by the computing device is includable within a second virtual composition surface of the plurality of virtual composition surfaces; and
responsive to the determination, integrating the valid region by the computing device into the second virtual composition surface, wherein the integration of the valid region into the second virtual composition surface comprises copying the valid region into a memory allocation corresponding to the second virtual composition surface.
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Abstract
Virtual surface update and composition techniques are described. These techniques include support of initialization and batching of updates, use of updates and lookaside lists, use of gutters, blending and BLT operations, surface optimization techniques such as push down as well as enumeration and clumping, mesh usage, and occlusion management techniques.
203 Citations
16 Claims
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1. A method implemented by a computing device, the method comprising:
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writing one or more visuals as composition elements including bitmaps and associated compositional metadata by the computing device to a plurality of virtual composition surfaces, each virtual composition surface comprising one or more logical composition surfaces representative of individual surfaces as seen by an application running on the computing device; tracking a plurality of valid regions by the computing device within the virtual composition surfaces comprising one or more current visuals; determining that a valid region of the plurality of valid regions of a first virtual composition surface of the plurality of virtual composition surfaces by the computing device is includable within a second virtual composition surface of the plurality of virtual composition surfaces; and responsive to the determination, integrating the valid region by the computing device into the second virtual composition surface, wherein the integration of the valid region into the second virtual composition surface comprises copying the valid region into a memory allocation corresponding to the second virtual composition surface. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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one or more processors; and one or more computer readable storage media comprising instructions, that, responsive to execution by the one or more processors, causes a visual composition system to perform operations comprising; writing one or more visuals as composition elements including bitmaps and associated compositional metadata to a plurality of virtual composition surfaces, each virtual composition surface comprising one or more logical composition surfaces representative of individual surfaces as seen by an application; tracking a plurality of valid regions within the virtual composition surfaces comprising one or more current visuals; determining that a first said valid region of a first said virtual composition surface is combinable with a second said valid region of a second said virtual composition surface; and responsive to the determination, creating a new virtual composition surface for inclusion of the first and second valid regions, and copying the first and second valid regions to the new virtual composition surface, wherein the copying of the first and second valid regions into the new virtual composition surface comprises copying the first and second valid regions into a memory allocation corresponding to the new virtual composition surface. - View Dependent Claims (9, 10, 11)
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12. One or more computer-readable storage media devices comprising instructions stored thereon, that, responsive to execution by one or more processors of a computing device, causes the computing device to implement a composition system to perform operations comprising:
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writing one or more visuals as composition elements including bitmaps and associated compositional metadata to a plurality of virtual composition surfaces, each virtual composition surface comprising one or more logical composition surfaces representative of individual surfaces as seen by an application running on the computing device; tracking a plurality of valid regions within the virtual composition surfaces comprising one or more current visuals; determining that a valid region of the plurality of valid regions of a first virtual composition surface of the plurality of virtual composition surfaces is includable within a second virtual composition surface of the plurality of virtual composition surfaces; and responsive to the determination, integrating the valid region into the second virtual composition surface, wherein the integration of the valid region into the second virtual composition surface comprises copying the valid region into a memory allocation corresponding to the second virtual composition surface. - View Dependent Claims (13, 14, 15, 16)
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Specification