VertexLayout.cpp

//
// Created by Charlotte on 28.05.2021.
//

#include "vkcv/VertexLayout.hpp"
#include "vkcv/Logger.hpp"

namespace vkcv {
	
    uint32_t getFormatSize(VertexAttachmentFormat format) {
        switch (format) {
            case VertexAttachmentFormat::FLOAT:
                return 4;
            case VertexAttachmentFormat::FLOAT2:
                return 8;
            case VertexAttachmentFormat::FLOAT3:
                return 12;
            case VertexAttachmentFormat::FLOAT4:
                return 16;
            case VertexAttachmentFormat::INT:
                return 4;
            case VertexAttachmentFormat::INT2:
                return 8;
            case VertexAttachmentFormat::INT3:
                return 12;
            case VertexAttachmentFormat::INT4:
                return 16;
            default:
				vkcv_log(LogLevel::WARNING, "No format given");
                return 0;
        }
    }
	
	VertexBinding createVertexBinding(uint32_t bindingLocation, const VertexAttachments &attachments) {
		VertexBinding binding { bindingLocation, 0, attachments };
		uint32_t offset = 0;
		
		for (auto& attachment : binding.vertexAttachments) {
			attachment.offset = offset;
			offset += getFormatSize(attachment.format);
		}
		
		binding.stride = offset;
		return binding;
	}
	
	VertexBindings createVertexBindings(const VertexAttachments &attachments) {
		VertexBindings bindings;
		bindings.reserve(attachments.size());
		
		for (uint32_t i = 0; i < attachments.size(); i++) {
			bindings.push_back(createVertexBinding(i, { attachments[i] }));
		}
		
		return bindings;
	}
	
}