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Load (and use) cube map mips

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This commit is contained in:
saschawillems 2016-06-04 11:31:22 +02:00
parent c68025a332
commit 3b7e57c03f
2 changed files with 33 additions and 17 deletions
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data/textures/cubemap_yokohama.ktx
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50
texturecubemap/texturecubemap.cpp
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@ -165,22 +165,11 @@ public:
memcpy(data, texCube.data(), texCube.size());
vkUnmapMemory(device, stagingMemory);
// Setup buffer copy regions for the cube faces
// As all faces of a cube map must have the same dimensions, we can do a single copy
VkBufferImageCopy bufferCopyRegion = {};
bufferCopyRegion.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
bufferCopyRegion.imageSubresource.mipLevel = 0;
bufferCopyRegion.imageSubresource.baseArrayLayer = 0;
bufferCopyRegion.imageSubresource.layerCount = 6;
bufferCopyRegion.imageExtent.width = cubeMap.width;
bufferCopyRegion.imageExtent.height = cubeMap.height;
bufferCopyRegion.imageExtent.depth = 1;
// Create optimal tiled target image
VkImageCreateInfo imageCreateInfo = vkTools::initializers::imageCreateInfo();
imageCreateInfo.imageType = VK_IMAGE_TYPE_2D;
imageCreateInfo.format = format;
imageCreateInfo.mipLevels = 1;
imageCreateInfo.mipLevels = cubeMap.mipLevels;
imageCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
imageCreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
imageCreateInfo.usage = VK_IMAGE_USAGE_SAMPLED_BIT;
@ -205,12 +194,37 @@ public:
VkCommandBuffer copyCmd = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
// Setup buffer copy regions for each face including all of it's miplevels
std::vector<VkBufferImageCopy> bufferCopyRegions;
uint32_t offset = 0;
for (uint32_t face = 0; face < 6; face++)
{
for (uint32_t level = 0; level < cubeMap.mipLevels; level++)
{
VkBufferImageCopy bufferCopyRegion = {};
bufferCopyRegion.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
bufferCopyRegion.imageSubresource.mipLevel = level;
bufferCopyRegion.imageSubresource.baseArrayLayer = face;
bufferCopyRegion.imageSubresource.layerCount = 1;
bufferCopyRegion.imageExtent.width = texCube[face][level].dimensions().x;
bufferCopyRegion.imageExtent.height = texCube[face][level].dimensions().y;
bufferCopyRegion.imageExtent.depth = 1;
bufferCopyRegion.bufferOffset = offset;
bufferCopyRegions.push_back(bufferCopyRegion);
// Increase offset into staging buffer for next level / face
offset += texCube[face][level].size();
}
}
// Image barrier for optimal image (target)
// Set initial layout for all array layers (faces) of the optimal (target) tiled texture
VkImageSubresourceRange subresourceRange = {};
subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
subresourceRange.baseMipLevel = 0;
subresourceRange.levelCount = 1;
subresourceRange.levelCount = cubeMap.mipLevels;
subresourceRange.layerCount = 6;
vkTools::setImageLayout(
@ -227,8 +241,8 @@ public:
stagingBuffer,
cubeMap.image,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
1,
&bufferCopyRegion
static_cast<uint32_t>(bufferCopyRegions.size()),
bufferCopyRegions.data()
);
// Change texture image layout to shader read after all faces have been copied
@ -252,10 +266,10 @@ public:
sampler.addressModeV = sampler.addressModeU;
sampler.addressModeW = sampler.addressModeU;
sampler.mipLodBias = 0.0f;
sampler.maxAnisotropy = 8;
sampler.maxAnisotropy = 8.0f;
sampler.compareOp = VK_COMPARE_OP_NEVER;
sampler.minLod = 0.0f;
sampler.maxLod = 0.0f;
sampler.maxLod = cubeMap.mipLevels;
sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &cubeMap.sampler));
@ -268,6 +282,8 @@ public:
view.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
// 6 array layers (faces)
view.subresourceRange.layerCount = 6;
// Set number of mip levels
view.subresourceRange.levelCount = cubeMap.mipLevels;
view.image = cubeMap.image;
VK_CHECK_RESULT(vkCreateImageView(device, &view, nullptr, &cubeMap.view));