--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/zamikongine/glslang/glslang.nim	Mon Jan 09 11:04:19 2023 +0700
@@ -0,0 +1,75 @@
+import glslang_c_interface
+import glslang_c_shader_types
+
+export
+  glslang_stage_t,
+  glslang_initialize_process,
+  glslang_finalize_process
+
+type
+  ShaderVersion = enum
+    ES_VERSION = 100
+    DESKTOP_VERSION = 110
+
+proc compileGLSLToSPIRV*(stage: glslang_stage_t, shaderSource: string, fileName: string): seq[uint32] =
+  var input = glslang_input_t(
+    stage: stage,
+    language: GLSLANG_SOURCE_GLSL,
+    client: GLSLANG_CLIENT_VULKAN,
+    client_version: GLSLANG_TARGET_VULKAN_1_2,
+    target_language: GLSLANG_TARGET_SPV,
+    target_language_version: GLSLANG_TARGET_SPV_1_5,
+    code: cstring(shaderSource),
+    default_version: ord(DESKTOP_VERSION),
+    default_profile: GLSLANG_CORE_PROFILE,
+    force_default_version_and_profile: false.cint,
+    forward_compatible: false.cint,
+    messages: GLSLANG_MSG_DEBUG_INFO_BIT,
+    resource: glslang_default_resource(),
+  )
+
+  var shader = glslang_shader_create(addr(input))
+
+  if not bool(glslang_shader_preprocess(shader, addr(input))):
+      echo "GLSL preprocessing failed " & fileName
+      echo glslang_shader_get_info_log(shader)
+      echo glslang_shader_get_info_debug_log(shader)
+      echo input.code
+      glslang_shader_delete(shader)
+      return
+
+  if not bool(glslang_shader_parse(shader, addr(input))):
+      echo "GLSL parsing failed " & fileName
+      echo glslang_shader_get_info_log(shader)
+      echo glslang_shader_get_info_debug_log(shader)
+      echo glslang_shader_get_preprocessed_code(shader)
+      glslang_shader_delete(shader)
+      return
+
+  var program: ptr glslang_program_t = glslang_program_create()
+  glslang_program_add_shader(program, shader)
+
+  if not bool(glslang_program_link(program, ord(GLSLANG_MSG_SPV_RULES_BIT) or ord(GLSLANG_MSG_VULKAN_RULES_BIT))):
+      echo "GLSL linking failed " & fileName
+      echo glslang_program_get_info_log(program)
+      echo glslang_program_get_info_debug_log(program)
+      glslang_program_delete(program)
+      glslang_shader_delete(shader)
+      return
+
+  glslang_program_SPIRV_generate(program, stage)
+
+  result = newSeq[uint32](glslang_program_SPIRV_get_size(program))
+  glslang_program_SPIRV_get(program, addr(result[0]))
+
+  var spirv_messages: cstring = glslang_program_SPIRV_get_messages(program)
+  if spirv_messages != nil:
+      echo "(%s) %s\b", fileName, spirv_messages
+
+  glslang_program_delete(program)
+  glslang_shader_delete(shader)
+
+template checkGlslangResult*(call: untyped) =
+  let value = call
+  if value != 1:
+    raise newException(Exception, "glgslang error: " & astToStr(call) & " returned " & $value)