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Added function for getting best-fit depth format to device

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Refs #607
This commit is contained in:
Sascha Willems 2019-12-01 18:13:22 +01:00
parent 92dcc1d23a
commit 99fa99ff37
2 changed files with 32 additions and 2 deletions
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31
base/VulkanDevice.hpp
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@ -567,5 +567,36 @@ namespace vks
return (std::find(supportedExtensions.begin(), supportedExtensions.end(), extension) != supportedExtensions.end());
}
/**
* Select the best-fit depth format for this device from a list of possible depth (and stencil) formats
*
* @param checkSamplingSupport Check if the format can be sampled from (e.g. for shader reads)
*
* @return The depth format that best fits for the current device
*
* @throw Throws an exception if no depth format fits the requirements
*/
VkFormat getSupportedDepthFormat(bool checkSamplingSupport)
{
// All depth formats may be optional, so we need to find a suitable depth format to use
std::vector<VkFormat> depthFormats = { VK_FORMAT_D32_SFLOAT_S8_UINT, VK_FORMAT_D32_SFLOAT, VK_FORMAT_D24_UNORM_S8_UINT, VK_FORMAT_D16_UNORM_S8_UINT, VK_FORMAT_D16_UNORM };
for (auto& format : depthFormats)
{
VkFormatProperties formatProperties;
vkGetPhysicalDeviceFormatProperties(physicalDevice, format, &formatProperties);
// Format must support depth stencil attachment for optimal tiling
if (formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT)
{
if (checkSamplingSupport) {
if (!(formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT)) {
continue;
}
}
return format;
}
}
throw std::runtime_error("Could not find a matching depth format");
}
};
}