--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/shader.nim	Sun Jan 01 01:00:50 2023 +0700
@@ -0,0 +1,35 @@
+import std/tables
+
+import ./vulkan_helpers
+import ./vulkan
+import ./glslang/glslang
+
+type
+  ShaderProgram* = object
+    entryPoint*: string
+    programType*: VkShaderStageFlagBits
+    shader*: VkPipelineShaderStageCreateInfo
+
+proc initShaderProgram*(device: VkDevice, programType: VkShaderStageFlagBits, shader: string, entryPoint: string="main"): ShaderProgram =
+  result.entryPoint = entryPoint
+  result.programType = programType
+
+  const VK_GLSL_MAP = {
+    VK_SHADER_STAGE_VERTEX_BIT: GLSLANG_STAGE_VERTEX,
+    VK_SHADER_STAGE_FRAGMENT_BIT: GLSLANG_STAGE_FRAGMENT,
+  }.toTable()
+  var code = compileGLSLToSPIRV(VK_GLSL_MAP[result.programType], shader, "<memory-shader>")
+  var createInfo = VkShaderModuleCreateInfo(
+    sType: VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
+    codeSize: uint(code.len * sizeof(uint32)),
+    pCode: if code.len > 0: addr(code[0]) else: nil,
+  )
+  var shaderModule: VkShaderModule
+  checkVkResult vkCreateShaderModule(device, addr(createInfo), nil, addr(shaderModule))
+
+  result.shader = VkPipelineShaderStageCreateInfo(
+    sType: VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+    stage: programType,
+    module: shaderModule,
+    pName: cstring(result.entryPoint), # entry point for shader
+  )