Update and document shader compilation scripts

Will no longer fail with certain shaderStages
Refs #1126

shaders/README.md

@@ -0,0 +1,3 @@
+# Shaders
+
+This folder contains the shaders used by the samples. Source files are available as GLSL and HLSL and also come with precompiled SPIR-V files that are consumed by the samples. To recompile shaders you can use the `compileshaders.py` scripts in the respective folders or any other means that can generate Vulkan SPIR-V from GLSL or HLSL. One such option is [this extension for Visual Studio](https://github.com/SaschaWillems/SPIRV-VSExtension).

shaders/glsl/compileshaders.py

@@ -1,3 +1,6 @@
+# Copyright (C) 2016-2024 by Sascha Willems - www.saschawillems.de
+# This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+
 import argparse
 import fileinput
 import os
@@ -25,7 +28,7 @@ def findGlslang():
         if isExe(full_path):
             return full_path
 
-    sys.exit("Could not find DXC executable on PATH, and was not specified with --dxc")
+    sys.exit("Could not find glslangvalidator executable on PATH, and was not specified with --glslang")
 
 glslang_path = findGlslang()
 dir_path = os.path.dirname(os.path.realpath(__file__))
@@ -40,10 +43,14 @@ for root, dirs, files in os.walk(dir_path):
             if args.g:
                 add_params = "-g"
 
+
+            # Ray tracing shaders require a different target environment           
             if file.endswith(".rgen") or file.endswith(".rchit") or file.endswith(".rmiss"):
                add_params = add_params + " --target-env vulkan1.2"
+            # Same goes for samples that use ray queries
+            if root.endswith("rayquery") and file.endswith(".frag"):
+                add_params = add_params + " --target-env vulkan1.2"
 
             res = subprocess.call("%s -V %s -o %s %s" % (glslang_path, input_file, output_file, add_params), shell=True)
-            # res = subprocess.call([glslang_path, '-V', input_file, '-o', output_file, add_params], shell=True)
             if res != 0:
-                sys.exit()
+                sys.exit(res)

shaders/hlsl/compileshaders.py

@@ -1,5 +1,5 @@
 # Copyright 2020 Google LLC
-# Copyright 2023 Sascha Willems
+# Copyright 2023-2024 Sascha Willems
 
 import argparse
 import fileinput
@@ -40,6 +40,7 @@ for root, dirs, files in os.walk(dir_path):
 
             target = ''
             profile = ''
+            additional_exts = ''
             if(hlsl_file.find('.vert') != -1):
                 profile = 'vs_6_1'
             elif(hlsl_file.find('.frag') != -1):
@@ -59,8 +60,12 @@ for root, dirs, files in os.walk(dir_path):
                 profile = 'lib_6_3'
             elif(hlsl_file.find('.mesh') != -1):
                 target='-fspv-target-env=vulkan1.2'
+                additional_exts = '-fspv-extension=SPV_EXT_mesh_shader'
                 profile = 'ms_6_6'                
 
+            if root.endswith("debugprintf"):
+                additional_exts = '-fspv-extension=SPV_KHR_non_semantic_info'
+
             print('Compiling %s' % (hlsl_file))
             subprocess.check_output([
                 dxc_path,
@@ -73,6 +78,7 @@ for root, dirs, files in os.walk(dir_path):
                 '-fspv-extension=SPV_EXT_descriptor_indexing',
                 '-fspv-extension=SPV_KHR_ray_query',
                 '-fspv-extension=SPV_KHR_fragment_shading_rate',
+                additional_exts,
                 target,
                 hlsl_file,
                 '-Fo', spv_out])