--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/semiconginev2/old/vulkan/renderpass.nim.orig	Wed Jul 17 21:01:37 2024 +0700
@@ -0,0 +1,107 @@
+import ../core
+import ./framebuffer
+
+proc CreateRenderPass*(
+  device: VkDevice,
+  format: VkFormat,
+): VkRenderPass =
+
+  var
+    attachments = @[VkAttachmentDescription(
+        format: format,
+        samples: VK_SAMPLE_COUNT_1_BIT,
+        loadOp: VK_ATTACHMENT_LOAD_OP_CLEAR,
+        storeOp: VK_ATTACHMENT_STORE_OP_STORE,
+        stencilLoadOp: VK_ATTACHMENT_LOAD_OP_DONT_CARE,
+        stencilStoreOp: VK_ATTACHMENT_STORE_OP_DONT_CARE,
+        initialLayout: VK_IMAGE_LAYOUT_UNDEFINED,
+        finalLayout: VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
+    )]
+    # dependencies seems to be optional, TODO: benchmark difference
+    dependencies = @[VkSubpassDependency(
+      srcSubpass: VK_SUBPASS_EXTERNAL,
+      dstSubpass: 0,
+      srcStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+      srcAccessMask: VkAccessFlags(0),
+      dstStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+      dstAccessMask: toBits [VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT],
+    )]
+    outputs = @[
+      VkAttachmentReference(
+        attachment: 0,
+        layout: VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+      )
+    ]
+
+  var subpassesList = [
+    VkSubpassDescription(
+      flags: VkSubpassDescriptionFlags(0),
+      pipelineBindPoint: VK_PIPELINE_BIND_POINT_GRAPHICS,
+      inputAttachmentCount: 0,
+      pInputAttachments: nil,
+      colorAttachmentCount: uint32(outputs.len),
+      pColorAttachments: outputs.ToCPointer,
+      pResolveAttachments: nil,
+      pDepthStencilAttachment: nil,
+      preserveAttachmentCount: 0,
+      pPreserveAttachments: nil,
+    )
+  ]
+
+  var createInfo = VkRenderPassCreateInfo(
+      sType: VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO,
+      attachmentCount: uint32(attachments.len),
+      pAttachments: attachments.ToCPointer,
+      subpassCount: uint32(subpassesList.len),
+      pSubpasses: subpassesList.ToCPointer,
+      dependencyCount: uint32(dependencies.len),
+      pDependencies: dependencies.ToCPointer,
+    )
+  checkVkResult device.vkCreateRenderPass(addr(createInfo), nil, addr(result))
+
+proc BeginRenderCommands*(commandBuffer: VkCommandBuffer, renderpass: VkRenderPass, framebuffer: Framebuffer, oneTimeSubmit: bool, clearColor: Vec4f) =
+  assert commandBuffer.Valid
+  assert framebuffer.vk.Valid
+  let
+    w = framebuffer.dimension.x
+    h = framebuffer.dimension.y
+
+  var clearColors = [VkClearValue(color: VkClearColorValue(float32: clearColor))]
+  var
+    beginInfo = VkCommandBufferBeginInfo(
+      sType: VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
+      pInheritanceInfo: nil,
+      flags: if oneTimeSubmit: VkCommandBufferUsageFlags(VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT) else: VkCommandBufferUsageFlags(0),
+    )
+    renderPassInfo = VkRenderPassBeginInfo(
+      sType: VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
+      renderPass: renderpass,
+      framebuffer: framebuffer.vk,
+      renderArea: VkRect2D(
+        offset: VkOffset2D(x: 0, y: 0),
+        extent: VkExtent2D(width: w, height: h),
+      ),
+      clearValueCount: uint32(clearColors.len),
+      pClearValues: clearColors.ToCPointer(),
+    )
+    viewport = VkViewport(
+      x: 0.0,
+      y: 0.0,
+      width: (float)w,
+      height: (float)h,
+      minDepth: 0.0,
+      maxDepth: 1.0,
+    )
+    scissor = VkRect2D(
+      offset: VkOffset2D(x: 0, y: 0),
+      extent: VkExtent2D(width: w, height: h)
+    )
+  checkVkResult commandBuffer.vkResetCommandBuffer(VkCommandBufferResetFlags(0))
+  checkVkResult commandBuffer.vkBeginCommandBuffer(addr(beginInfo))
+  commandBuffer.vkCmdBeginRenderPass(addr(renderPassInfo), VK_SUBPASS_CONTENTS_INLINE)
+  commandBuffer.vkCmdSetViewport(firstViewport = 0, viewportCount = 1, addr(viewport))
+  commandBuffer.vkCmdSetScissor(firstScissor = 0, scissorCount = 1, addr(scissor))
+
+proc EndRenderCommands*(commandBuffer: VkCommandBuffer) =
+  commandBuffer.vkCmdEndRenderPass()
+  checkVkResult commandBuffer.vkEndCommandBuffer()