VkConditionalRenderingBeginInfoEXT

The VkConditionalRenderingBeginInfoEXT structure is defined as:

typedef struct VkConditionalRenderingBeginInfoEXT {
    VkStructureType sType;
    const void* pNext;
    VkBuffer buffer;
    VkDeviceSize offset;
    VkConditionalRenderingFlagsEXT flags;
} VkConditionalRenderingBeginInfoEXT;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• buffer is a buffer containing the predicate for conditional rendering.
• offset is the byte offset into buffer where the predicate is located.
• flags is a bitmask of VkConditionalRenderingFlagsEXT specifying the behavior of conditional rendering.

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.