/*
Crafter®.Graphics
Copyright (C) 2026 Catcrafts®
catcrafts.net
*/

// JS bridge declarations for the DOM-mode WebGPU backend. Each function
// corresponds to one entry in `additional/dom-webgpu.js`. Handles are
// opaque uint32 cookies into the JS-side handle tables.

export module Crafter.Graphics:WebGPU;
#ifdef CRAFTER_GRAPHICS_WINDOW_DOM
import std;

export namespace Crafter {
    using WebGPUBufferRef         = std::uint32_t;
    using WebGPUTextureRef        = std::uint32_t;
    using WebGPUSamplerRef        = std::uint32_t;
    using WebGPUCommandEncoderRef = std::uint32_t; // unused as a real handle; just a marker type for portability
}

namespace Crafter::WebGPU {
    __attribute__((import_module("env"), import_name("wgpuGetCanvasWidth")))
    extern "C" std::int32_t wgpuGetCanvasWidth();
    __attribute__((import_module("env"), import_name("wgpuGetCanvasHeight")))
    extern "C" std::int32_t wgpuGetCanvasHeight();
    __attribute__((import_module("env"), import_name("wgpuSurfaceWidth")))
    extern "C" std::int32_t wgpuSurfaceWidth();
    __attribute__((import_module("env"), import_name("wgpuSurfaceHeight")))
    extern "C" std::int32_t wgpuSurfaceHeight();
    __attribute__((import_module("env"), import_name("wgpuInit")))
    extern "C" void wgpuInit();

    __attribute__((import_module("env"), import_name("wgpuCreateBuffer")))
    extern "C" std::uint32_t wgpuCreateBuffer(std::int32_t byteSize);
    __attribute__((import_module("env"), import_name("wgpuWriteBuffer")))
    extern "C" void wgpuWriteBuffer(std::uint32_t handle, const void* srcPtr, std::int32_t byteSize);
    __attribute__((import_module("env"), import_name("wgpuDestroyBuffer")))
    extern "C" void wgpuDestroyBuffer(std::uint32_t handle);

    __attribute__((import_module("env"), import_name("wgpuCreateAtlasTexture")))
    extern "C" std::uint32_t wgpuCreateAtlasTexture(std::int32_t w, std::int32_t h);
    __attribute__((import_module("env"), import_name("wgpuWriteAtlasRegion")))
    extern "C" void wgpuWriteAtlasRegion(std::uint32_t handle, const void* srcPtr,
                                         std::int32_t srcW, std::int32_t srcH,
                                         std::int32_t srcBytesPerRow,
                                         std::int32_t dstX, std::int32_t dstY,
                                         std::int32_t copyW, std::int32_t copyH);
    __attribute__((import_module("env"), import_name("wgpuDestroyTexture")))
    extern "C" void wgpuDestroyTexture(std::uint32_t handle);

    __attribute__((import_module("env"), import_name("wgpuCreateLinearClampSampler")))
    extern "C" std::uint32_t wgpuCreateLinearClampSampler();

    __attribute__((import_module("env"), import_name("wgpuFrameBegin")))
    extern "C" void wgpuFrameBegin();
    __attribute__((import_module("env"), import_name("wgpuFrameEnd")))
    extern "C" void wgpuFrameEnd();

    __attribute__((import_module("env"), import_name("wgpuDispatchQuads")))
    extern "C" void wgpuDispatchQuads(std::uint32_t itemsHandle, const void* headerPtr,
                                      std::int32_t gx, std::int32_t gy);
    __attribute__((import_module("env"), import_name("wgpuDispatchCircles")))
    extern "C" void wgpuDispatchCircles(std::uint32_t itemsHandle, const void* headerPtr,
                                        std::int32_t gx, std::int32_t gy);
    __attribute__((import_module("env"), import_name("wgpuDispatchImages")))
    extern "C" void wgpuDispatchImages(std::uint32_t itemsHandle, const void* headerPtr,
                                       std::int32_t gx, std::int32_t gy,
                                       std::uint32_t texHandle, std::uint32_t sampHandle);
    __attribute__((import_module("env"), import_name("wgpuDispatchText")))
    extern "C" void wgpuDispatchText(std::uint32_t itemsHandle, const void* headerPtr,
                                     std::int32_t gx, std::int32_t gy,
                                     std::uint32_t atlasHandle, std::uint32_t sampHandle);

    // ─── custom user-authored compute shaders ───────────────────────────
    __attribute__((import_module("env"), import_name("wgpuLoadCustomShader")))
    extern "C" std::uint32_t wgpuLoadCustomShader(const void* wgslPtr, std::int32_t wgslLen,
                                                  const void* bindingsPtr, std::int32_t bindingsCount);
    __attribute__((import_module("env"), import_name("wgpuDispatchCustom")))
    extern "C" void wgpuDispatchCustom(std::uint32_t pipelineHandle,
                                       const void* pushPtr, std::int32_t pushBytes,
                                       const void* handlesPtr, std::int32_t handlesCount,
                                       std::int32_t gx, std::int32_t gy, std::int32_t gz);
}
#endif // CRAFTER_GRAPHICS_WINDOW_DOM