vkCmdBeginConditionalRenderingEXT - Define the beginning of a conditional rendering block

Parameters

• commandBuffer is the command buffer into which this command will be recorded.

• pConditionalRenderingBegin is a pointer to a ConditionalRenderingBeginInfoEXT structure specifying parameters of conditional rendering.

Valid Usage

• Conditional rendering must not already be active

Valid Usage (Implicit)

• commandBuffer must be a valid CommandBuffer handle

• pConditionalRenderingBegin must be a valid pointer to a valid ConditionalRenderingBeginInfoEXT structure
• commandBuffer must be in the recording state
• The CommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

• Host access to commandBuffer must be externally synchronized

• Host access to the CommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

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See Also

CommandBuffer, ConditionalRenderingBeginInfoEXT

This function will call the supplied action between calls to cmdBeginConditionalRenderingEXT and cmdEndConditionalRenderingEXT

Note that cmdEndConditionalRenderingEXT is *not* called if an exception is thrown by the inner action.

vkCmdEndConditionalRenderingEXT - Define the end of a conditional rendering block

Parameters

• commandBuffer is the command buffer into which this command will be recorded.

Description

Once ended, conditional rendering becomes inactive.

Valid Usage

• Conditional rendering must be active

• If conditional rendering was made active outside of a render pass instance, it must not be ended inside a render pass instance
• If conditional rendering was made active within a subpass it must be ended in the same subpass

Valid Usage (Implicit)

• commandBuffer must be a valid CommandBuffer handle

• commandBuffer must be in the recording state
• The CommandPool that commandBuffer was allocated from must support graphics, or compute operations

Host Synchronization

• Host access to commandBuffer must be externally synchronized

• Host access to the CommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties

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See Also

CommandBuffer

VkConditionalRenderingBeginInfoEXT - Structure specifying conditional rendering begin info

Description

If the 32-bit value at offset in buffer memory is zero, then the rendering commands are discarded, otherwise they are executed as normal. If the value of the predicate in buffer memory changes while conditional rendering is active, the rendering commands may be discarded in an implementation-dependent way. Some implementations may latch the value of the predicate upon beginning conditional rendering while others may read it before every rendering command.

Valid Usage

• If buffer is non-sparse then it must be bound completely and contiguously to a single DeviceMemory object

• buffer must have been created with the BUFFER_USAGE_CONDITIONAL_RENDERING_BIT_EXT bit set
• offset must be less than the size of buffer by at least 32 bits
• offset must be a multiple of 4

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_CONDITIONAL_RENDERING_BEGIN_INFO_EXT

• pNext must be NULL
• buffer must be a valid Buffer handle
• flags must be a valid combination of ConditionalRenderingFlagBitsEXT values

See Also

Buffer, ConditionalRenderingFlagsEXT, DeviceSize, StructureType, cmdBeginConditionalRenderingEXT

VkCommandBufferInheritanceConditionalRenderingInfoEXT - Structure specifying command buffer inheritance info

Description

If this structure is not present, the behavior is as if conditionalRenderingEnable is FALSE.

Valid Usage

• If the inherited conditional rendering feature is not enabled, conditionalRenderingEnable must be FALSE

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_CONDITIONAL_RENDERING_INFO_EXT

See Also

Bool32, StructureType

VkPhysicalDeviceConditionalRenderingFeaturesEXT - Structure describing if a secondary command buffer can be executed if conditional rendering is active in the primary command buffer

Description

If the PhysicalDeviceConditionalRenderingFeaturesEXT structure is included in the pNext chain of PhysicalDeviceFeatures2, it is filled with values indicating the implementation-dependent behavior. PhysicalDeviceConditionalRenderingFeaturesEXT can also be included in pNext chain of DeviceCreateInfo to enable the features.

Valid Usage (Implicit)

See Also

Bool32, StructureType

VkConditionalRenderingFlagBitsEXT - Specify the behavior of conditional rendering

See Also

ConditionalRenderingFlagsEXT