BindGroupLayoutBuilder.h

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#pragma once
 
#include "graphics/webgpu/wgpu_types.h"
 
#include <vector>
 
namespace eve::graphics::webgpu {
 
class BindGroupLayoutBuilder {
public:
    BindGroupLayoutBuilder() = default;
 
    BindGroupLayoutBuilder &buffer(uint32_t binding, wgpu::ShaderStage visibility,
                                   wgpu::BufferBindingType type, bool dynamicOffset,
                                   uint64_t minBindingSize) {
        wgpu::BindGroupLayoutEntry e{};
        e.binding = binding;
        e.visibility = visibility;
        e.buffer = {nullptr, type, dynamicOffset, minBindingSize};
        entries_.push_back(std::move(e));
        return *this;
    }
 
    BindGroupLayoutBuilder &texture(uint32_t binding, wgpu::ShaderStage visibility,
                                    wgpu::TextureSampleType sampleType,
                                    wgpu::TextureViewDimension dim, bool multisampled = false) {
        wgpu::BindGroupLayoutEntry e{};
        e.binding = binding;
        e.visibility = visibility;
        e.texture = {nullptr, sampleType, dim, multisampled};
        entries_.push_back(std::move(e));
        return *this;
    }
 
    BindGroupLayoutBuilder &sampler(uint32_t binding, wgpu::ShaderStage visibility,
                                    wgpu::SamplerBindingType type) {
        wgpu::BindGroupLayoutEntry e{};
        e.binding = binding;
        e.visibility = visibility;
        e.sampler = {nullptr, type};
        entries_.push_back(std::move(e));
        return *this;
    }
 
    size_t entryCount() const { return entries_.size(); }
 
    wgpu::BindGroupLayout build(const wgpu::Device &device, const char *label) const;
 
private:
    std::vector<wgpu::BindGroupLayoutEntry> entries_;
};
 
}  // namespace eve::graphics::webgpu