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Copy pathMipmapGenerator.cpp
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103 lines (89 loc) · 3.43 KB
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#include "MipmapGenerator.hpp"
void MipmapGenerator::generate(
const MipmapGenerator::MipmapProps& mipmapProps,
SingleTimeCommand& singleTimeCommand,
const vk::PhysicalDevice& physicalDevice
) {
vk::FormatProperties formatProperties =
physicalDevice.getFormatProperties(mipmapProps.imageFormat);
if (!(formatProperties.optimalTilingFeatures &
vk::FormatFeatureFlagBits::eSampledImageFilterLinear)) {
throw std::runtime_error(
"Texture image format does not support linear blitting"
);
}
vk::CommandBuffer commandBuffer = singleTimeCommand.begin();
vk::ImageMemoryBarrier barrier{};
barrier.image = mipmapProps.image;
barrier.srcQueueFamilyIndex = vk::QueueFamilyIgnored;
barrier.dstQueueFamilyIndex = vk::QueueFamilyIgnored;
barrier.subresourceRange.aspectMask = vk::ImageAspectFlagBits::eColor;
barrier.subresourceRange.baseArrayLayer = 0;
barrier.subresourceRange.layerCount = 1;
barrier.subresourceRange.levelCount = 1;
int32_t mipWidth = mipmapProps.texWidth;
int32_t mipHeight = mipmapProps.texHeight;
for (uint32_t i = 1; i < mipmapProps.mipLevels; i++) {
barrier.subresourceRange.baseMipLevel = i - 1;
barrier.oldLayout = vk::ImageLayout::eTransferDstOptimal;
barrier.newLayout = vk::ImageLayout::eTransferSrcOptimal;
barrier.srcAccessMask = vk::AccessFlagBits::eTransferWrite;
barrier.dstAccessMask = vk::AccessFlagBits::eTransferRead;
commandBuffer.pipelineBarrier(
vk::PipelineStageFlagBits::eTransfer,
vk::PipelineStageFlagBits::eTransfer,
{},
nullptr,
nullptr,
barrier
);
vk::ImageBlit blit{};
blit.srcOffsets[1] = vk::Offset3D{mipWidth, mipHeight, 1};
blit.srcSubresource.aspectMask = vk::ImageAspectFlagBits::eColor;
blit.srcSubresource.mipLevel = i - 1;
blit.srcSubresource.baseArrayLayer = 0;
blit.srcSubresource.layerCount = 1;
blit.dstOffsets[1] = vk::Offset3D{
mipWidth > 1 ? mipWidth / 2 : 1, mipHeight > 1 ? mipHeight / 2 : 1, 1};
blit.dstSubresource.aspectMask = vk::ImageAspectFlagBits::eColor;
blit.dstSubresource.mipLevel = i;
blit.dstSubresource.baseArrayLayer = 0;
blit.dstSubresource.layerCount = 1;
commandBuffer.blitImage(
mipmapProps.image,
vk::ImageLayout::eTransferSrcOptimal,
mipmapProps.image,
vk::ImageLayout::eTransferDstOptimal,
1,
&blit,
vk::Filter::eLinear
);
barrier.oldLayout = vk::ImageLayout::eTransferSrcOptimal;
barrier.newLayout = vk::ImageLayout::eShaderReadOnlyOptimal;
barrier.srcAccessMask = vk::AccessFlagBits::eTransferRead;
barrier.dstAccessMask = vk::AccessFlagBits::eShaderRead;
commandBuffer.pipelineBarrier(
vk::PipelineStageFlagBits::eTransfer,
vk::PipelineStageFlagBits::eFragmentShader,
{},
nullptr,
nullptr,
barrier
);
if (mipWidth > 1) mipWidth /= 2;
if (mipHeight > 1) mipHeight /= 2;
}
barrier.subresourceRange.baseMipLevel = mipmapProps.mipLevels - 1;
barrier.oldLayout = vk::ImageLayout::eTransferDstOptimal;
barrier.newLayout = vk::ImageLayout::eShaderReadOnlyOptimal;
barrier.srcAccessMask = vk::AccessFlagBits::eTransferWrite;
barrier.dstAccessMask = vk::AccessFlagBits::eShaderRead;
commandBuffer.pipelineBarrier(
vk::PipelineStageFlagBits::eTransfer,
vk::PipelineStageFlagBits::eFragmentShader,
{},
nullptr,
nullptr,
barrier
);
}