Make sure that check_struct is called where needed (#161)

* Make sure that check_struct is called where needed

* consistency

* black is the new black

* Check for errors in code gen report

* implement check_struct

* nicer name, without typo

* Test that check_struct actually does something

* Implement check_struct and apply a few fixes

codegen/__main__.py

@@ -21,7 +21,7 @@ def prepare():
 
 
 def update_api():
-    """ Update the public API and patch the public-facing API of the backends. """
+    """Update the public API and patch the public-facing API of the backends."""
 
     print("## Updating API")
 
@@ -50,7 +50,7 @@ def update_api():
 
 
 def update_rs():
-    """ Update and check the rs backend. """
+    """Update and check the rs backend."""
 
     print("## Validating rs.py")
 
@@ -68,7 +68,7 @@ def update_rs():
 
 
 def main():
-    """ Codegen entry point. """
+    """Codegen entry point."""
 
     with PrintToFile(os.path.join(lib_dir, "resources", "codegen_report.md")):
         print("# Code generatation report")

codegen/apipatcher.py

@@ -5,8 +5,8 @@
 
 import os
 
-from .utils import print, lib_dir, blacken, to_snake_case, to_camel_case, Patcher
-from .idlparser import get_idl_parser
+from codegen.utils import print, lib_dir, blacken, to_snake_case, to_camel_case, Patcher
+from codegen.idlparser import get_idl_parser
 
 
 def patch_base_api(code):
@@ -42,7 +42,11 @@ def patch_backend_api(code):
         base_api_code = f.read().decode()
 
     # Patch!
-    for patcher in [CommentRemover(), BackendApiPatcher(base_api_code)]:
+    for patcher in [
+        CommentRemover(),
+        BackendApiPatcher(base_api_code),
+        StructValidationChecker(),
+    ]:
         patcher.apply(code)
         code = patcher.dumps()
     return code
@@ -53,7 +57,7 @@ class CommentRemover(Patcher):
     to prevent accumulating comments.
     """
 
-    triggers = "# IDL:", "# FIXME: unknown api"
+    triggers = "# IDL:", "# FIXME: unknown api", "# FIXME: missing check_struct"
 
     def apply(self, code):
         self._init(code)
@@ -174,7 +178,7 @@ def patch_properties(self, classname, i1, i2):
             self._apidiffs_from_lines(pre_lines, propname)
             if self.prop_is_known(classname, propname):
                 if "@apidiff.add" in pre_lines:
-                    print(f"Error: apidiff.add for known {classname}.{propname}")
+                    print(f"ERROR: apidiff.add for known {classname}.{propname}")
                 elif "@apidiff.hide" in pre_lines:
                     pass  # continue as normal
                 old_line = self.lines[j1]
@@ -207,7 +211,7 @@ def patch_methods(self, classname, i1, i2):
             self._apidiffs_from_lines(pre_lines, methodname)
             if self.method_is_known(classname, methodname):
                 if "@apidiff.add" in pre_lines:
-                    print(f"Error: apidiff.add for known {classname}.{methodname}")
+                    print(f"ERROR: apidiff.add for known {classname}.{methodname}")
                 elif "@apidiff.hide" in pre_lines:
                     pass  # continue as normal
                 elif "@apidiff.change" in pre_lines:
@@ -443,3 +447,64 @@ def get_required_prop_names(self, classname):
     def get_required_method_names(self, classname):
         _, methods = self.classes[classname]
         return list(name for name in methods.keys() if methods[name][1])
+
+
+class StructValidationChecker(Patcher):
+    """Checks that all structs are vaildated in the methods that have incoming structs."""
+
+    def apply(self, code):
+        self._init(code)
+
+        idl = get_idl_parser()
+        all_structs = set()
+        ignore_structs = {"Extent3D"}
+
+        for classname, i1, i2 in self.iter_classes():
+            if classname not in idl.classes:
+                continue
+
+            # For each method ...
+            for methodname, j1, j2 in self.iter_methods(i1 + 1):
+                code = "\n".join(self.lines[j1 : j2 + 1])
+                # Get signature and cut it up in words
+                sig_words = code.partition("(")[2].split("):")[0]
+                for c in "][(),\"'":
+                    sig_words = sig_words.replace(c, " ")
+                # Collect incoming structs from signature
+                method_structs = set()
+                for word in sig_words.split():
+                    if word.startswith("structs."):
+                        structname = word.partition(".")[2]
+                        method_structs.update(self._get_sub_structs(idl, structname))
+                all_structs.update(method_structs)
+                # Collect structs being checked
+                checked = set()
+                for line in code.splitlines():
+                    line = line.lstrip()
+                    if line.startswith("check_struct("):
+                        name = line.split("(")[1].split(",")[0].strip('"')
+                        checked.add(name)
+                # Test that a matching check is done
+                unchecked = method_structs.difference(checked)
+                unchecked = list(sorted(unchecked.difference(ignore_structs)))
+                if (
+                    methodname.endswith("_async")
+                    and f"return self.{methodname[:-7]}" in code
+                ):
+                    pass
+                elif unchecked:
+                    msg = f"missing check_struct in {methodname}: {unchecked}"
+                    self.insert_line(j1, f"# FIXME: {msg}")
+                    print(f"ERROR: {msg}")
+
+        # Test that we did find structs. In case our detection fails for
+        # some reason, this would probably catch that.
+        assert len(all_structs) > 10
+
+    def _get_sub_structs(self, idl, structname):
+        structnames = {structname}
+        for structfield in idl.structs[structname].values():
+            structname2 = structfield.typename[3:]  # remove "GPU"
+            if structname2 in idl.structs:
+                structnames.update(self._get_sub_structs(idl, structname2))
+        return structnames

codegen/hparser.py

@@ -10,7 +10,7 @@
 
 
 def get_h_parser(*, allow_cache=True):
-    """ Get the global HParser object. """
+    """Get the global HParser object."""
 
     # Singleton pattern
     global _parser

codegen/idlparser.py

@@ -16,7 +16,7 @@
 
 
 def get_idl_parser(*, allow_cache=True):
-    """ Get the global IdlParser object. """
+    """Get the global IdlParser object."""
 
     # Singleton pattern
     global _parser

codegen/rspatcher.py

@@ -193,7 +193,7 @@ def apply(self, code):
                 if name not in hp.functions:
                     msg = f"unknown C function {name}"
                     self.insert_line(i, f"{indent}# FIXME: {msg}")
-                    print(f"Error: {msg}")
+                    print(f"ERROR: {msg}")
                 else:
                     detected.add(name)
                     anno = hp.functions[name].replace(name, "f").strip(";")
@@ -302,7 +302,7 @@ def _validate_struct(self, hp, i1, i2):
         if struct_name not in hp.structs:
             msg = f"unknown C struct {struct_name}"
             self.insert_line(i1, f"{indent}# FIXME: {msg}")
-            print(f"Error: {msg}")
+            print(f"ERROR: {msg}")
             return
         else:
             struct = hp.structs[struct_name]
@@ -322,7 +322,7 @@ def _validate_struct(self, hp, i1, i2):
             if key not in struct:
                 msg = f"unknown C struct field {struct_name}.{key}"
                 self.insert_line(i1 + j, f"{indent}# FIXME: {msg}")
-                print(f"Error: {msg}")
+                print(f"ERROR: {msg}")
 
         # Insert comments for unused keys
         more_lines = []

codegen/tests/test_codegen_z.py

@@ -71,5 +71,15 @@ def test_that_code_is_up_to_date():
     print("Codegen check ok!")
 
 
+def test_that_codegen_report_has_no_errors():
+    filename = os.path.join(lib_dir, "resources", "codegen_report.md")
+    with open(filename, "rb") as f:
+        text = f.read().decode()
+
+    # The codegen uses a prefix "ERROR:" for unacceptable things.
+    # All caps, some function names may contain the name "error".
+    assert "ERROR" not in text
+
+
 if __name__ == "__main__":
     test_that_code_is_up_to_date()

codegen/utils.py

@@ -55,7 +55,7 @@ def print(*args, **kwargs):
 
 
 class PrintToFile:
-    """ Context manager to print to file. """
+    """Context manager to print to file."""
 
     def __init__(self, f):
         if isinstance(f, str):

examples/cube_glfw.py

@@ -389,7 +389,7 @@ def draw_frame():
 
 
 def simple_event_loop():
-    """ A real simple event loop, but it keeps the CPU busy. """
+    """A real simple event loop, but it keeps the CPU busy."""
     while update_glfw_canvasses():
         glfw.poll_events()
 

examples/triangle_glfw.py

@@ -21,13 +21,13 @@
 
 
 def simple_event_loop():
-    """ A real simple event loop, but it keeps the CPU busy. """
+    """A real simple event loop, but it keeps the CPU busy."""
     while update_glfw_canvasses():
         glfw.poll_events()
 
 
 def better_event_loop(max_fps=100):
-    """ A simple event loop that schedules draws. """
+    """A simple event loop that schedules draws."""
     td = 1 / max_fps
     while update_glfw_canvasses():
         # Determine next time to draw

tests/test_compute.py

@@ -172,6 +172,13 @@ def compute_shader(
     )
     bind_group = device.create_bind_group(layout=bind_group_layout, entries=bindings)
 
+    # Create and run the pipeline, fail - test check_struct
+    with raises(ValueError):
+        compute_pipeline = device.create_compute_pipeline(
+            layout=pipeline_layout,
+            compute={"module": cshader, "entry_point": "main", "foo": 42},
+        )
+
     # Create and run the pipeline
     compute_pipeline = device.create_compute_pipeline(
         layout=pipeline_layout,
@@ -259,7 +266,7 @@ def compute_shader(
         compute_with_buffers({0: in1}, {0: c_int32 * 100}, compute_shader, n=-1)
 
     with raises(TypeError):  # invalid shader
-        compute_with_buffers({0: in1}, {0: c_int32 * 100}, "not a shader")
+        compute_with_buffers({0: in1}, {0: c_int32 * 100}, {"not", "a", "shader"})
 
 
 if __name__ == "__main__":

tests/test_rs_basics.py

@@ -144,7 +144,7 @@ def test_shader_module_creation():
     with raises(TypeError):
         device.create_shader_module(code=code4)
     with raises(TypeError):
-        device.create_shader_module(code="not a shader")
+        device.create_shader_module(code={"not", "a", "shader"})
     with raises(ValueError):
         device.create_shader_module(code=b"bytes but no SpirV magic number")
 

tests/test_rs_render.py

@@ -511,13 +511,13 @@ def cb(renderpass):
         format=wgpu.TextureFormat.depth24plus_stencil8,
         depth_write_enabled=True,
         depth_compare=wgpu.CompareFunction.less_equal,
-        front={
+        stencil_front={
             "compare": wgpu.CompareFunction.equal,
             "fail_op": wgpu.StencilOperation.keep,
             "depth_fail_op": wgpu.StencilOperation.keep,
             "pass_op": wgpu.StencilOperation.keep,
         },
-        back={
+        stencil_back={
             "compare": wgpu.CompareFunction.equal,
             "fail_op": wgpu.StencilOperation.keep,
             "depth_fail_op": wgpu.StencilOperation.keep,