Contact
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Vikram Kushwaha vkushwaha
Other Extension Metadata
- Last Modified Date
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2018-05-21
- IP Status
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No known IP claims.
- Contributors
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Vikram Kushwaha, NVIDIA
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Daniel Rakos, AMD
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Jesse Hall, Google
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Jeff Bolz, NVIDIA
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Piers Daniell, NVIDIA
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Stuart Smith, Imagination Technologies
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Description
This extension allows the execution of one or more rendering commands to be conditional on a value in buffer memory. This may help an application reduce the latency by conditionally discarding rendering commands without application intervention. The conditional rendering commands are limited to draws, compute dispatches and clearing attachments within a conditional rendering block.
New Enum Constants
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VK_EXT_CONDITIONAL_RENDERING_EXTENSION_NAME
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VK_EXT_CONDITIONAL_RENDERING_SPEC_VERSION
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Extending VkAccessFlagBits:
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VK_ACCESS_CONDITIONAL_RENDERING_READ_BIT_EXT
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Extending VkBufferUsageFlagBits:
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VK_BUFFER_USAGE_CONDITIONAL_RENDERING_BIT_EXT
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Extending VkPipelineStageFlagBits:
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VK_PIPELINE_STAGE_CONDITIONAL_RENDERING_BIT_EXT
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Extending VkStructureType:
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VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_CONDITIONAL_RENDERING_INFO_EXT
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VK_STRUCTURE_TYPE_CONDITIONAL_RENDERING_BEGIN_INFO_EXT
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CONDITIONAL_RENDERING_FEATURES_EXT
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Issues
1) Should conditional rendering affect copy and blit commands?
RESOLVED: Conditional rendering should not affect copies and blits.
2) Should secondary command buffers be allowed to execute while conditional rendering is active in the primary command buffer?
RESOLVED: The rendering commands in secondary command buffer will be
affected by an active conditional rendering in primary command buffer if the
conditionalRenderingEnable
is set to VK_TRUE
.
Conditional rendering must not be active in the primary command buffer if
conditionalRenderingEnable
is VK_FALSE
.
Version History
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Revision 1, 2018-04-19 (Vikram Kushwaha)
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First Version
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Revision 2, 2018-05-21 (Vikram Kushwaha)
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Add new pipeline stage, access flags and limit conditional rendering to a subpass or entire render pass.
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Document Notes
For more information, see the Vulkan Specification
This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.