Validation layers gives me errors that makes non sense

Vulkan
1

Hi!
I’ve validation layers errors that doesn’t make any sense :

validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[2].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[3].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[4].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[5].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkUpdateDescriptorSets(): pDescriptorWrites[0].pImageInfo[0].imageView image layout is VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL, but descriptorType is VK_DESCRIPTOR_TYPE_STORAGE_IMAGE. (allowed layouts are VK_IMAGE_LAYOUT_GENERAL or VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR).
The Vulkan spec states: If descriptorType is VK_DESCRIPTOR_TYPE_STORAGE_IMAGE the imageLayout member of each element of pImageInfo must be a member of the list given in Storage Image (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkWriteDescriptorSet-descriptorType-04152)
validation layer: vkCreateGraphicsPipelines(): pCreateInfos[0].pVertexInputState Vertex attribute at location 1 not consumed by vertex shader.
validation layer: vkCreateGraphicsPipelines(): pCreateInfos[0].pVertexInputState Vertex attribute at location 2 not consumed by vertex shader.
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[2].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[3].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[4].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[5].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkUpdateDescriptorSets(): pDescriptorWrites[0].pImageInfo[0].imageView image layout is VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL, but descriptorType is VK_DESCRIPTOR_TYPE_STORAGE_IMAGE. (allowed layouts are VK_IMAGE_LAYOUT_GENERAL or VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR).
The Vulkan spec states: If descriptorType is VK_DESCRIPTOR_TYPE_STORAGE_IMAGE the imageLayout member of each element of pImageInfo must be a member of the list given in Storage Image (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkWriteDescriptorSet-descriptorType-04152)
validation layer: vkCreateGraphicsPipelines(): pCreateInfos[0].pVertexInputState Vertex attribute at location 1 not consumed by vertex shader.
validation layer: vkCreateGraphicsPipelines(): pCreateInfos[0].pVertexInputState Vertex attribute at location 2 not consumed by vertex shader.

First of all it tells me that descriptorCount is 0 when creating the descriptor pool but that’s not true, the descriptor count value is 1 : frameBuffer.getMaxFrameinFlight() returns 1.

poolSizes[1].type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
            poolSizes[1].descriptorCount = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight());
            poolSizes[2].type = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
            poolSizes[2].descriptorCount = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight());
            poolSizes[3].type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
            poolSizes[3].descriptorCount = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight() * allTextures.size());
            poolSizes[4].type = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
            poolSizes[4].descriptorCount = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight());
            poolSizes[5].type = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
            poolSizes[5].descriptorCount = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight());

So why it tells me the descriptorCount is 0 when creating the descriptor pool that doesn’t make any sense.

Secondly it tells me that the imageViewLayout is incorrect…

But I don’t set it to VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL.
I set it to VK_IMAGE_LAYOUT_GENERAL :

VkDescriptorImageInfo headPtrDescriptorImageInfo;
                headPtrDescriptorImageInfo.imageLayout = VK_IMAGE_LAYOUT_GENERAL;
                headPtrDescriptorImageInfo.imageView = headPtrTextureImageView;
                headPtrDescriptorImageInfo.sampler = headPtrTextureSampler;

Is there something wrong here ?

void PerPixelLinkedListRenderComponent::createHeadPtrImageView() {
            VkImageViewCreateInfo viewInfo{};
            viewInfo.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
            viewInfo.image = headPtrTextureImage;
            viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
            viewInfo.format = VK_FORMAT_R32_UINT;
            viewInfo.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
            viewInfo.subresourceRange.baseMipLevel = 0;
            viewInfo.subresourceRange.levelCount = 1;
            viewInfo.subresourceRange.baseArrayLayer = 0;
            viewInfo.subresourceRange.layerCount = 1;
            if (vkCreateImageView(vkDevice.getDevice(), &viewInfo, nullptr, &headPtrTextureImageView) != VK_SUCCESS) {
                throw std::runtime_error("failed to create head ptr texture image view!");
            }           
        }

And next it tells me that vertex attributes at location 0 and 1 are not consumed in the vertex shader.
I don’t need to use them in this vertex shader but I declared them in the shader and in my input descriptions :

static VkVertexInputBindingDescription getBindingDescription() {
                VkVertexInputBindingDescription bindingDescription{};
                bindingDescription.binding = 0;
                bindingDescription.stride = sizeof(Vertex);
                bindingDescription.inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
                return bindingDescription;
            }
            static std::array<VkVertexInputAttributeDescription, 3> getAttributeDescriptions() {
                std::array<VkVertexInputAttributeDescription, 3> attributeDescriptions{};
                attributeDescriptions[0].binding = 0;
                attributeDescriptions[0].location = 0;
                attributeDescriptions[0].format = VK_FORMAT_R32G32_SFLOAT;
                attributeDescriptions[0].offset = offsetof(Vertex, position);

                attributeDescriptions[1].binding = 0;
                attributeDescriptions[1].location = 1;
                attributeDescriptions[1].format = VK_FORMAT_R8G8B8A8_UNORM;
                attributeDescriptions[1].offset = offsetof(Vertex, color);

                attributeDescriptions[2].binding = 0;
                attributeDescriptions[2].location = 2;
                attributeDescriptions[2].format = VK_FORMAT_R32G32_SFLOAT;
                attributeDescriptions[2].offset = offsetof(Vertex, texCoords);
                return attributeDescriptions;
            }

const std::string  simpleVertexShader = R"(#version 460
                                                        layout (location = 0) in vec3 position;
                                                        layout (location = 1) in vec4 color;
                                                        layout (location = 2) in vec2 texCoords;
                                                        layout (location = 3) in vec3 normals;
                                                        layout (push_constant) uniform PushConsts {
                                                            mat4 projectionMatrix;
                                                            mat4 viewMatrix;
                                                            mat4 worldMat;
                                                        } pushConsts;
                                                        void main () {
                                                            gl_Position = pushConsts.projectionMatrix * pushConsts.viewMatrix * pushConsts.worldMat * vec4(position, 1.f);
                                                        })";

How to fix this validation error message ?

Thanks.

2

I’ve corrected one error :

validation layer: vkUpdateDescriptorSets(): pDescriptorWrites[0].pImageInfo[0].imageView image layout is VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL, but descriptorType is VK_DESCRIPTOR_TYPE_STORAGE_IMAGE. (allowed layouts are VK_IMAGE_LAYOUT_GENERAL or VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR).
The Vulkan spec states: If descriptorType is VK_DESCRIPTOR_TYPE_STORAGE_IMAGE the imageLayout member of each element of pImageInfo must be a member of the list given in Storage Image (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkWriteDescriptorSet-descriptorType-04152)

I had another function which also create descriptorWrites and I’ve forgot to change the image_layout.

But the other errors remains :

validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[2].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[3].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[4].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateDescriptorPool(): pCreateInfo->pPoolSizes[5].descriptorCount is zero.
The Vulkan spec states: descriptorCount must be greater than 0 (https://vulkan.lunarg.com/doc/view/1.4.309.0/windows/antora/spec/latest/chapters/descriptorsets.html#VUID-VkDescriptorPoolSize-descriptorCount-00302)
validation layer: vkCreateGraphicsPipelines(): pCreateInfos[0].pVertexInputState Vertex attribute at location 1 not consumed by vertex shader.
validation layer: vkCreateGraphicsPipelines(): pCreateInfos[0].pVertexInputState Vertex attribute at location 2 not consumed by vertex shader.

And nothing is drawn…

I haven’t any problem with the opengl code everything is drawn correctly but when the vulkan code nothing is drawn and I have those stupid validation layout errors…

Why ?

3

Ok I’ve found the error for the pool creation it was here :

void PerPixelLinkedListRenderComponent::createDescriptorPool2() {
            std::array<VkDescriptorPoolSize, 2> poolSizes{};
            poolSizes[0].type = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
            poolSizes[0].descriptorCount = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight());
            poolSizes[1].type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
            poolSizes[1].descriptorCount = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight());


            VkDescriptorPoolCreateInfo poolInfo{};
            poolInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
            poolInfo.poolSizeCount = static_cast<uint32_t>(poolSizes.size());
            poolInfo.pPoolSizes = poolSizes.data();
            poolInfo.maxSets = static_cast<uint32_t>(frameBuffer.getMaxFramesInFlight());
            if (vkCreateDescriptorPool(vkDevice.getDevice(), &poolInfo, nullptr, &descriptorPool) != VK_SUCCESS) {
                throw std::runtime_error("echec de la creation de la pool de descripteurs!");
            }
        }

I’ve forgot to change the size of my std::array from 6 to 2.
Solved.