--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/semiconginev2/rendering/renderpasses.nim	Wed Jul 17 21:01:37 2024 +0700
@@ -0,0 +1,173 @@
+proc CreateDirectPresentationRenderPass*(samples = VK_SAMPLE_COUNT_1_BIT): VkRenderPass =
+  assert vulkan.instance.Valid, "Vulkan not initialized"
+
+  let format = DefaultSurfaceFormat()
+  var attachments = @[VkAttachmentDescription(
+    format: format,
+    samples: samples,
+    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: if samples == VK_SAMPLE_COUNT_1_BIT: VK_IMAGE_LAYOUT_PRESENT_SRC_KHR else: VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+  )]
+  if samples != VK_SAMPLE_COUNT_1_BIT:
+    attachments.add VkAttachmentDescription(
+      format: format,
+      samples: VK_SAMPLE_COUNT_1_BIT,
+      loadOp: VK_ATTACHMENT_LOAD_OP_DONT_CARE,
+      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,
+    )
+  var
+    dependencies = @[
+      VkSubpassDependency(
+        srcSubpass: VK_SUBPASS_EXTERNAL,
+        dstSubpass: 0,
+        srcStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT],
+        dstStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT],
+        srcAccessMask: toBits [VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT],
+        dstAccessMask: toBits [VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT],
+      )
+    ]
+    colorAttachment = VkAttachmentReference(
+      attachment: 0,
+      layout: VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+    )
+    resolveAttachment = VkAttachmentReference(
+      attachment: 1,
+      layout: VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+    )
+
+  if samples == VK_SAMPLE_COUNT_1_BIT:
+    return svkCreateRenderPass(attachments, [colorAttachment], [], dependencies)
+  else:
+    return svkCreateRenderPass(attachments, [colorAttachment], [resolveAttachment], dependencies)
+
+proc CreateIndirectPresentationRenderPass*(): (VkRenderPass, VkRenderPass) =
+  assert vulkan.instance.Valid, "Vulkan not initialized"
+
+  # first renderpass, drawing
+  let format = DefaultSurfaceFormat()
+  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_SHADER_READ_ONLY_OPTIMAL,
+    )]
+
+    dependencies = @[
+      VkSubpassDependency(
+        srcSubpass: VK_SUBPASS_EXTERNAL,
+        dstSubpass: 0,
+        srcStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+        dstStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+        srcAccessMask: VkAccessFlags(0),
+        dstAccessMask: toBits [VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT],
+      ),
+      VkSubpassDependency(
+        srcSubpass: VK_SUBPASS_EXTERNAL,
+        dstSubpass: 0,
+        srcStageMask: toBits [VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT],
+        dstStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+        srcAccessMask: toBits [VK_ACCESS_SHADER_READ_BIT],
+        dstAccessMask: toBits [VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT],
+      ),
+      VkSubpassDependency(
+        srcSubpass: 0,
+        dstSubpass: VK_SUBPASS_EXTERNAL,
+        srcStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+        dstStageMask: toBits [VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT],
+        srcAccessMask: toBits [VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT],
+        dstAccessMask: toBits [VK_ACCESS_SHADER_READ_BIT],
+      ),
+    ]
+    colorAttachment = VkAttachmentReference(
+      attachment: 0,
+      layout: VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+    )
+
+  # second renderpass, presentation
+  var
+    presentAttachments = @[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,
+    )]
+    presentDependencies = @[VkSubpassDependency(
+      srcSubpass: VK_SUBPASS_EXTERNAL,
+      dstSubpass: 0,
+      srcStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+      dstStageMask: toBits [VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT],
+      srcAccessMask: VkAccessFlags(0),
+      dstAccessMask: toBits [VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT],
+    )]
+    presentColorAttachment = VkAttachmentReference(
+      attachment: 0,
+      layout: VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+    )
+
+  result = (
+    svkCreateRenderPass(attachments, [colorAttachment], [], dependencies),
+    svkCreateRenderPass(presentAttachments, [presentColorAttachment], [], presentDependencies)
+  )
+
+template WithRenderPass*(
+  theRenderpass: VkRenderPass,
+  theFramebuffer: VkFramebuffer,
+  commandbuffer: VkCommandBuffer,
+  renderWidth: uint32,
+  renderHeight: uint32,
+  clearColor: Vec4f,
+  body: untyped
+): untyped =
+  var
+    clearColors = [VkClearValue(color: VkClearColorValue(float32: clearColor))]
+    renderPassInfo = VkRenderPassBeginInfo(
+      sType: VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO,
+      renderPass: theRenderpass,
+      framebuffer: theFramebuffer,
+      renderArea: VkRect2D(
+        offset: VkOffset2D(x: 0, y: 0),
+        extent: VkExtent2D(width: renderWidth, height: renderHeight),
+      ),
+      clearValueCount: uint32(clearColors.len),
+      pClearValues: clearColors.ToCPointer(),
+    )
+    viewport = VkViewport(
+      x: 0.0,
+      y: renderHeight.float32,
+      width: renderWidth.float32,
+      height: -renderHeight.float32,
+      minDepth: 0.0,
+      maxDepth: 1.0,
+    )
+    scissor = VkRect2D(
+      offset: VkOffset2D(x: 0, y: 0),
+      extent: VkExtent2D(width: renderWidth, height: renderHeight)
+    )
+
+  vkCmdBeginRenderPass(commandbuffer, addr(renderPassInfo), VK_SUBPASS_CONTENTS_INLINE)
+
+  # setup viewport
+  vkCmdSetViewport(commandbuffer, firstViewport = 0, viewportCount = 1, addr(viewport))
+  vkCmdSetScissor(commandbuffer, firstScissor = 0, scissorCount = 1, addr(scissor))
+
+  block:
+    body
+
+  vkCmdEndRenderPass(commandbuffer)