--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/semiconginev2/old/vulkan/drawable.nim	Wed Jul 17 21:01:37 2024 +0700
@@ -0,0 +1,62 @@
+import std/tables
+import std/strformat
+import std/logging
+
+import ../core
+import ./buffer
+
+type
+  Drawable* = object
+    name*: string
+    elementCount*: int                                                              # number of vertices or indices
+    bufferOffsets*: Table[VkPipeline, seq[(string, MemoryPerformanceHint, uint64)]] # list of buffers and list of offset for each attribute in that buffer
+    instanceCount*: int                                                             # number of instance
+    case indexed*: bool
+    of true:
+      indexType*: VkIndexType
+      indexBufferOffset*: uint64
+    of false:
+      discard
+
+func `$`*(drawable: Drawable): string =
+  if drawable.indexed:
+    &"Drawable({drawable.name}, elementCount: {drawable.elementCount}, instanceCount: {drawable.instanceCount}, bufferOffsets: {drawable.bufferOffsets}, indexType: {drawable.indexType}, indexBufferOffset: {drawable.indexBufferOffset})"
+  else:
+    &"Drawable({drawable.name}, elementCount: {drawable.elementCount}, instanceCount: {drawable.instanceCount}, bufferOffsets: {drawable.bufferOffsets})"
+
+proc Draw*(drawable: Drawable, commandBuffer: VkCommandBuffer, vertexBuffers: Table[MemoryPerformanceHint, Buffer], indexBuffer: Buffer, pipeline: VkPipeline) =
+  debug &"Draw {drawable} with pipeline {pipeline}"
+
+  var buffers: seq[VkBuffer]
+  var offsets: seq[VkDeviceSize]
+
+  for (name, performanceHint, offset) in drawable.bufferOffsets[pipeline]:
+    assert vertexBuffers[performanceHint].vk.Valid
+    buffers.add vertexBuffers[performanceHint].vk
+    offsets.add VkDeviceSize(offset)
+
+  debug "Binding buffers: ", buffers
+  debug "with offsets ", offsets
+  commandBuffer.vkCmdBindVertexBuffers(
+    firstBinding = 0'u32,
+    bindingCount = uint32(buffers.len),
+    pBuffers = buffers.ToCPointer(),
+    pOffsets = offsets.ToCPointer()
+  )
+  if drawable.indexed:
+    assert indexBuffer.vk.Valid
+    commandBuffer.vkCmdBindIndexBuffer(indexBuffer.vk, VkDeviceSize(drawable.indexBufferOffset), drawable.indexType)
+    commandBuffer.vkCmdDrawIndexed(
+      indexCount = uint32(drawable.elementCount),
+      instanceCount = uint32(drawable.instanceCount),
+      firstIndex = 0,
+      vertexOffset = 0,
+      firstInstance = 0
+    )
+  else:
+    commandBuffer.vkCmdDraw(
+      vertexCount = uint32(drawable.elementCount),
+      instanceCount = uint32(drawable.instanceCount),
+      firstVertex = 0,
+      firstInstance = 0
+    )