add generic interfaces for updating descriptors

vulkan.d

@@ -1,4 +1,4 @@
-import vulkan_funcs;
+import iulkan_funcs;
 import vulkan_logging;
 import vulkan_util;
 import std.stdio;
@@ -2159,6 +2159,47 @@ InitGlobalDescSet(Vulkan* vk)
 	return success;
 }
 
+void
+Write(Vulkan* vk, DescSet set, ImageView* view, u32 index, DescType type)
+{
+	VkDescriptorImageInfo info = {
+		imageView: view.view,
+		imagelayout: view.layout,
+	};
+
+	VkWriteDescriptorSet write = {
+		sType: VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET,
+		dstSet: set.handle,
+		dstBinding: index,
+		descriptorCount: 1,
+		descriptorType: type,
+		pImageInfo: &info,
+	};
+
+	vkUpdateDescriptorSets(vk.device, 1, &write, 0, null);
+}
+
+void
+Write(Vulkan* vk, DescSet set, Buffer* buffer, u32 index, DescType type)
+{
+	VkDescriptorBufferInfo info = {
+		buffer: buffer.buffer,
+		range: buffer.size,
+		offset: 0,
+	};
+
+	VkWriteDescriptorSet write = {
+		sType: VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET,
+		dstSet: set.handle,
+		dstBinding: index,
+		descriptorCount: 1,
+		descriptorType: type,
+		pBufferInfo: &info,
+	};
+
+	vkUpdateDescriptorSets(vk.device, 1, &write, 0, null);
+}
+
 void
 WriteGUI(Vulkan* vk, DescSet set, ImageView* atlas, Buffer* buf)
 {