cs237-pipeline.hpp

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/*
 * COPYRIGHT (c) 2023 John Reppy (http://cs.uchicago.edu/~jhr)
 * All rights reserved.
 */
 
#ifndef _CS237_PIPELINE_HPP_
#define _CS237_PIPELINE_HPP_
 
#ifndef _CS237_HPP_
#error "cs237-pipeline.hpp should not be included directly"
#endif
 
namespace cs237 {
 
inline
vk::PipelineVertexInputStateCreateInfo vertexInputInfo (
    std::vector<vk::VertexInputBindingDescription> const &descs,
    std::vector<vk::VertexInputAttributeDescription> const &attrs)
{
    vk::PipelineVertexInputStateCreateInfo vertexInfo{};
 
    vertexInfo.vertexBindingDescriptionCount = descs.size();
    if (descs.size() > 0) {
        // we copy the data into the heap to ensure that it is still around
        // when we create the pipeline
        auto pDescs = new vk::VertexInputBindingDescription[descs.size()];
        for (int i = 0;  i < descs.size();  ++i) {
            pDescs[i] = descs[i];
        }
        vertexInfo.pVertexBindingDescriptions = pDescs;
    }
 
    vertexInfo.vertexAttributeDescriptionCount = attrs.size();
    if (attrs.size() > 0) {
        auto pAttrs = new vk::VertexInputAttributeDescription[attrs.size()];
        for (int i = 0;  i < attrs.size();  ++i) {
            pAttrs[i] = attrs[i];
        }
        vertexInfo.pVertexAttributeDescriptions = pAttrs;
    }
 
    return vertexInfo;
}
 
inline
void destroyVertexInputInfo (vk::PipelineVertexInputStateCreateInfo &info)
{
    if (info.pVertexBindingDescriptions != nullptr) {
        delete info.pVertexBindingDescriptions;
        info.pVertexBindingDescriptions = nullptr;
    }
    if (info.pVertexAttributeDescriptions != nullptr) {
        delete info.pVertexAttributeDescriptions;
        info.pVertexAttributeDescriptions = nullptr;
    }
}
 
} // namespace cs237
 
#endif // !_CS237_PIPELINE_HPP_