VK_IMG_filter_cubic
Other Extension Metadata
Last Modified Date
2016-02-23
Contributors
- Tobias Hector, Imagination Technologies
Description
VK_IMG_filter_cubic
adds an additional, high quality cubic filtering mode
to Vulkan, using a Catmull-Rom bicubic filter.
Performing this kind of filtering can be done in a shader by using 16
samples and a number of instructions, but this can be inefficient.
The cubic filter mode exposes an optimized high quality texture sampling
using fixed texture sampling functionality.
New Enum Constants
VK_IMG_FILTER_CUBIC_EXTENSION_NAME
VK_IMG_FILTER_CUBIC_SPEC_VERSION
- Extending VkFilter:
VK_FILTER_CUBIC_IMG
- Extending VkFormatFeatureFlagBits:
VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_CUBIC_BIT_IMG
Example
Creating a sampler with the new filter for both magnification and minification
VkSamplerCreateInfo createInfo =
{
.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO,
// Other members set to application-desired values
};
createInfo.magFilter = VK_FILTER_CUBIC_IMG;
createInfo.minFilter = VK_FILTER_CUBIC_IMG;
VkSampler sampler;
VkResult result = vkCreateSampler(
device,
&createInfo,
&sampler);
Version History
- Revision 1, 2016-02-23 (Tobias Hector)
- Initial version