Implement client-side WebGPU API with command buffer recording

src/client/classes.hpp

@@ -38,12 +38,28 @@ namespace builtin_scene
 /**
  * @namespace client_graphics
  * The `client_graphics` namespace contains classes related to graphics rendering,
- * such as `WebGLContext` and `WebGL2Context`.
+ * such as `WebGLContext`, `WebGL2Context`, and `WebGPUContext`.
  */
 namespace client_graphics
 {
   class WebGLContext;  // Represents a WebGL 1.0 rendering context
   class WebGL2Context; // Represents a WebGL 2.0 rendering context
+
+  // WebGPU classes
+  class WebGPUContext;           // Represents a WebGPU context
+  class WebGPUAdapter;           // Represents a WebGPU adapter
+  class WebGPUDevice;            // Represents a WebGPU device
+  class WebGPUQueue;             // Represents a WebGPU queue
+  class WebGPUCommandEncoder;    // Represents a WebGPU command encoder
+  class WebGPUCommandBuffer;     // Represents a WebGPU command buffer
+  class WebGPURenderPassEncoder; // Represents a WebGPU render pass encoder
+
+  // WebGPU resource classes (placeholders)
+  class WebGPUBuffer;          // Represents a WebGPU buffer
+  class WebGPUTexture;         // Represents a WebGPU texture
+  class WebGPUBindGroup;       // Represents a WebGPU bind group
+  class WebGPURenderPipeline;  // Represents a WebGPU render pipeline
+  class WebGPUComputePipeline; // Represents a WebGPU compute pipeline
 }
 
 /**

src/client/graphics/webgpu_command_encoder.cpp

@@ -0,0 +1,349 @@
+#include "./webgpu_command_encoder.hpp"
+
+#include <iostream>
+#include <stdexcept>
+
+namespace client_graphics
+{
+  using namespace std;
+
+  // WebGPUCommandBuffer implementation
+  WebGPUCommandBuffer::WebGPUCommandBuffer(std::optional<std::string> label)
+      : label_(label.value_or("WebGPUCommandBuffer"))
+  {
+  }
+
+  void WebGPUCommandBuffer::execute() const
+  {
+    // In the client-side implementation, this would typically transmit
+    // the recorded commands to the graphics server for execution.
+    // For now, we just log the execution for debugging purposes.
+
+    if (commands_.empty())
+    {
+      return;
+    }
+
+    // In a full implementation, this would serialize and send the commands
+    // to the server-side renderer via the command buffer system.
+    // Following the WebGL pattern in webgl_context.cpp
+
+    std::cout << "Executing WebGPU command buffer '" << label_
+              << "' with " << commands_.size() << " commands" << std::endl;
+
+    // Placeholder for command transmission logic
+    // This would follow the same pattern as WebGLContext::sendCommandBufferRequest()
+  }
+
+  // WebGPURenderPassEncoder implementation
+  WebGPURenderPassEncoder::WebGPURenderPassEncoder(
+    std::shared_ptr<WebGPUCommandBuffer> commandBuffer,
+    const commandbuffers::GPURenderPassDescriptor &descriptor,
+    std::optional<std::string> label)
+      : command_buffer_(std::move(commandBuffer))
+      , descriptor_(descriptor)
+      , label_(label.value_or("WebGPURenderPassEncoder"))
+  {
+    if (!command_buffer_)
+    {
+      throw std::runtime_error("WebGPURenderPassEncoder: Command buffer cannot be null");
+    }
+  }
+
+  void WebGPURenderPassEncoder::setPipeline(const WebGPURenderPipeline &pipeline)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot set pipeline on ended render pass encoder");
+    }
+
+    // Record pipeline setting command
+    // In a full implementation, this would use the actual pipeline object
+    // command_buffer_->addCommand<commandbuffers::GPUSetRenderPipelineCommand>(pipeline);
+
+    // Placeholder implementation
+    std::cout << "WebGPU: Set render pipeline in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::setBindGroup(uint32_t index,
+                                             const WebGPUBindGroup &bindGroup,
+                                             const std::vector<uint32_t> &dynamicOffsets)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot set bind group on ended render pass encoder");
+    }
+
+    // Record bind group setting command
+    // command_buffer_->addCommand<commandbuffers::GPUSetBindGroupCommand>(bindGroup, index);
+
+    std::cout << "WebGPU: Set bind group " << index << " in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::setVertexBuffer(uint32_t slot,
+                                                const WebGPUBuffer &buffer,
+                                                uint64_t offset,
+                                                uint64_t size)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot set vertex buffer on ended render pass encoder");
+    }
+
+    // Record vertex buffer setting command following the existing pattern
+    // command_buffer_->addCommand<commandbuffers::GPUSetVertexBufferCommand>(slot, buffer, offset, size);
+
+    std::cout << "WebGPU: Set vertex buffer slot " << slot << " in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::setIndexBuffer(const WebGPUBuffer &buffer,
+                                               commandbuffers::GPUIndexFormat format,
+                                               uint64_t offset,
+                                               uint64_t size)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot set index buffer on ended render pass encoder");
+    }
+
+    // Record index buffer setting command
+    // command_buffer_->addCommand<commandbuffers::GPUSetIndexBufferCommand>(buffer, format, offset, size);
+
+    std::cout << "WebGPU: Set index buffer in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::draw(uint32_t vertexCount,
+                                     uint32_t instanceCount,
+                                     uint32_t firstVertex,
+                                     uint32_t firstInstance)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot draw on ended render pass encoder");
+    }
+
+    // Record draw command using the existing GPU command structure
+    command_buffer_->addCommand<commandbuffers::GPUDrawCommand>(
+      vertexCount, instanceCount, firstVertex, firstInstance);
+
+    std::cout << "WebGPU: Draw " << vertexCount << " vertices in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::drawIndexed(uint32_t indexCount,
+                                            uint32_t instanceCount,
+                                            uint32_t firstIndex,
+                                            int32_t baseVertex,
+                                            uint32_t firstInstance)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot draw indexed on ended render pass encoder");
+    }
+
+    // Record indexed draw command
+    command_buffer_->addCommand<commandbuffers::GPUDrawIndexedCommand>(
+      indexCount, instanceCount, firstIndex, baseVertex, firstInstance);
+
+    std::cout << "WebGPU: Draw indexed " << indexCount << " indices in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::setViewport(float x, float y, float width, float height, float minDepth, float maxDepth)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot set viewport on ended render pass encoder");
+    }
+
+    // Record viewport command
+    command_buffer_->addCommand<commandbuffers::GPUSetViewportCommand>(
+      x, y, width, height, minDepth, maxDepth);
+
+    std::cout << "WebGPU: Set viewport " << width << "x" << height << " in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::setScissorRect(uint32_t x, uint32_t y, uint32_t width, uint32_t height)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot set scissor rect on ended render pass encoder");
+    }
+
+    // Record scissor command
+    command_buffer_->addCommand<commandbuffers::GPUSetScissorCommand>(
+      static_cast<float>(x), static_cast<float>(y), static_cast<float>(width), static_cast<float>(height));
+
+    std::cout << "WebGPU: Set scissor rect " << width << "x" << height << " in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::end()
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Render pass encoder already ended");
+    }
+
+    if (debug_group_depth_ > 0)
+    {
+      throw std::runtime_error("Cannot end render pass encoder with unclosed debug groups");
+    }
+
+    ended_ = true;
+    std::cout << "WebGPU: End render pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::pushDebugGroup(const std::string &groupLabel)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot push debug group on ended render pass encoder");
+    }
+
+    debug_group_depth_++;
+    std::cout << "WebGPU: Push debug group '" << groupLabel << "' in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::popDebugGroup()
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot pop debug group on ended render pass encoder");
+    }
+
+    if (debug_group_depth_ == 0)
+    {
+      throw std::runtime_error("No debug group to pop");
+    }
+
+    debug_group_depth_--;
+    std::cout << "WebGPU: Pop debug group in pass '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPURenderPassEncoder::insertDebugMarker(const std::string &markerLabel)
+  {
+    if (ended_)
+    {
+      throw std::runtime_error("Cannot insert debug marker on ended render pass encoder");
+    }
+
+    std::cout << "WebGPU: Debug marker '" << markerLabel << "' in pass '" << label_ << "'" << std::endl;
+  }
+
+  // WebGPUCommandEncoder implementation
+  WebGPUCommandEncoder::WebGPUCommandEncoder(std::optional<std::string> label)
+      : command_buffer_(std::make_shared<WebGPUCommandBuffer>(label))
+      , label_(label.value_or("WebGPUCommandEncoder"))
+  {
+  }
+
+  std::unique_ptr<WebGPURenderPassEncoder> WebGPUCommandEncoder::beginRenderPass(
+    const commandbuffers::GPURenderPassDescriptor &descriptor)
+  {
+    if (finished_)
+    {
+      throw std::runtime_error("Cannot begin render pass on finished command encoder");
+    }
+
+    // Create render pass encoder with shared command buffer
+    auto encoder = std::make_unique<WebGPURenderPassEncoder>(
+      command_buffer_, descriptor, "RenderPass");
+
+    std::cout << "WebGPU: Begin render pass in encoder '" << label_ << "'" << std::endl;
+
+    return encoder;
+  }
+
+  void WebGPUCommandEncoder::copyBufferToBuffer(const WebGPUBuffer &source,
+                                                uint64_t sourceOffset,
+                                                const WebGPUBuffer &destination,
+                                                uint64_t destinationOffset,
+                                                uint64_t size)
+  {
+    if (finished_)
+    {
+      throw std::runtime_error("Cannot copy buffer on finished command encoder");
+    }
+
+    // Record buffer copy command
+    // In a full implementation, this would use actual buffer objects
+    std::cout << "WebGPU: Copy buffer to buffer (" << size << " bytes) in encoder '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPUCommandEncoder::clearBuffer(const WebGPUBuffer &buffer,
+                                         uint64_t offset,
+                                         uint64_t size)
+  {
+    if (finished_)
+    {
+      throw std::runtime_error("Cannot clear buffer on finished command encoder");
+    }
+
+    // Record buffer clear command
+    std::cout << "WebGPU: Clear buffer (" << size << " bytes at offset " << offset
+              << ") in encoder '" << label_ << "'" << std::endl;
+  }
+
+  std::unique_ptr<WebGPUCommandBuffer> WebGPUCommandEncoder::finish(
+    std::optional<std::string> label)
+  {
+    if (finished_)
+    {
+      throw std::runtime_error("Command encoder already finished");
+    }
+
+    if (debug_group_depth_ > 0)
+    {
+      throw std::runtime_error("Cannot finish command encoder with unclosed debug groups");
+    }
+
+    finished_ = true;
+
+    // Create a new command buffer with the recorded commands
+    auto finalLabel = label.value_or(command_buffer_->label());
+    auto finishedBuffer = std::make_unique<WebGPUCommandBuffer>(finalLabel);
+
+    // Transfer commands from shared buffer to the finished buffer
+    finishedBuffer->commands_ = std::move(command_buffer_->commands_);
+
+    std::cout << "WebGPU: Finish command encoder '" << label_
+              << "' with " << finishedBuffer->commandCount() << " commands" << std::endl;
+
+    return finishedBuffer;
+  }
+
+  void WebGPUCommandEncoder::pushDebugGroup(const std::string &groupLabel)
+  {
+    if (finished_)
+    {
+      throw std::runtime_error("Cannot push debug group on finished command encoder");
+    }
+
+    debug_group_depth_++;
+    std::cout << "WebGPU: Push debug group '" << groupLabel << "' in encoder '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPUCommandEncoder::popDebugGroup()
+  {
+    if (finished_)
+    {
+      throw std::runtime_error("Cannot pop debug group on finished command encoder");
+    }
+
+    if (debug_group_depth_ == 0)
+    {
+      throw std::runtime_error("No debug group to pop");
+    }
+
+    debug_group_depth_--;
+    std::cout << "WebGPU: Pop debug group in encoder '" << label_ << "'" << std::endl;
+  }
+
+  void WebGPUCommandEncoder::insertDebugMarker(const std::string &markerLabel)
+  {
+    if (finished_)
+    {
+      throw std::runtime_error("Cannot insert debug marker on finished command encoder");
+    }
+
+    std::cout << "WebGPU: Debug marker '" << markerLabel << "' in encoder '" << label_ << "'" << std::endl;
+  }
+}