- improve handling of -v2 pmfx and ignore default techniques, fixup hlsl / windows readme command lines so they are copy pastable and work

Author: polymonster

pmfx.py

@@ -1097,7 +1097,7 @@ def inherit_technique(technique, pmfx_json):
 
 
 # parse pmfx file to find the json block pmfx: { }
-def find_pmfx_json(shader_file_text):
+def find_pmfx_json(shader_file_text, create_default=True):
     pmfx_loc = shader_file_text.find("pmfx:")
     if pmfx_loc != -1:
         # pmfx json exists, return the block
@@ -1106,7 +1106,7 @@ def find_pmfx_json(shader_file_text):
         pmfx_json = jsn.loads(shader_file_text[json_loc:pmfx_end + json_loc])
         shader_text_removed = shader_file_text[:pmfx_loc] + shader_file_text[pmfx_loc + pmfx_end:].strip()
         return pmfx_json, shader_text_removed
-    else:
+    elif create_default:
         # shader can have no pmfx, provided it supplies vs_main and ps_main
         if find_function(shader_file_text, "vs_main") and find_function(shader_file_text, "ps_main"):
             pmfx_json = dict()

pmfx_pipeline.py

@@ -799,7 +799,7 @@ def generate_pmfx(file, root):
 
     # semi similar to v1-path, allows pmfx: {} and hls source code to be mixed in the ame file  
     shader_file_text_full, included_files = build_pmfx.create_shader_set(input_pmfx_filepath, root)
-    pmfx_json, shader_source = build_pmfx.find_pmfx_json(shader_file_text_full)
+    pmfx_json, shader_source = build_pmfx.find_pmfx_json(shader_file_text_full, False)
 
     if not pmfx_json:
         pmfx_json, shader_source, included_files = load_pmfx_jsn(file, root)

readme.md

@@ -107,7 +107,7 @@ python3 pmfx.py -v1 -shader_platform metal -metal_sdk iphoneos -metal_min_os 0.9
 python3 pmfx.py -v1 -shader_platform spirv -i examples/v1 -o output/bin -h output/structs -t output/temp
 
 // hlsl d3d11
-python3 pmfx.py -v1 -shader_platform hlsl -shader_version 4_0 -i examples/v1 -o output/bin -h output/structs -t output/temp
+py -3 pmfx.py -v1 -shader_platform hlsl -shader_version 5_0 -i examples/v1 -o output/bin -h output/structs -t output/temp
 
 // glsl
 python3 pmfx.py -v1 -shader_platform glsl -shader_version 330 -i examples/v1 -o output/bin -h output/structs -t output/temp
@@ -609,7 +609,7 @@ Full [documentation](https://github.com/polymonster/pmfx-shader/blob/master/docs
 Compilation is simple with command line args as so:
 
 ```text
-python3 pmfx.py -shader_platform hlsl -shader_version 6_0 -i examples/v2/ -o ${data_dir}/shaders -t ${temp_dir}/shaders
+py -3 pmfx.py -shader_platform hlsl -shader_version 6_0 -i examples/v2/ -o build/data/shaders -t build/temp/shaders
 ```  
 
 ### Examples