mirror of
https://github.com/godotengine/godot
synced 2024-11-02 11:59:10 +00:00
223 lines
7.8 KiB
Python
223 lines
7.8 KiB
Python
"""Functions used to generate source files during build time"""
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import os.path
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from typing import Optional, Iterable
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def generate_inline_code(input_lines: Iterable[str], insert_newline: bool = True):
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"""Take header data and generate inline code
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:param: input_lines: values for shared inline code
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:return: str - generated inline value
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"""
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output = []
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for line in input_lines:
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if line:
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output.append(",".join(str(ord(c)) for c in line))
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if insert_newline:
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output.append("%s" % ord("\n"))
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output.append("0")
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return ",".join(output)
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class RDHeaderStruct:
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def __init__(self):
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self.vertex_lines = []
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self.fragment_lines = []
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self.compute_lines = []
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self.vertex_included_files = []
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self.fragment_included_files = []
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self.compute_included_files = []
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self.reading = ""
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self.line_offset = 0
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self.vertex_offset = 0
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self.fragment_offset = 0
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self.compute_offset = 0
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def include_file_in_rd_header(filename: str, header_data: RDHeaderStruct, depth: int) -> RDHeaderStruct:
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with open(filename, "r") as fs:
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line = fs.readline()
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while line:
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index = line.find("//")
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if index != -1:
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line = line[:index]
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if line.find("#[vertex]") != -1:
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header_data.reading = "vertex"
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line = fs.readline()
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header_data.line_offset += 1
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header_data.vertex_offset = header_data.line_offset
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continue
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if line.find("#[fragment]") != -1:
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header_data.reading = "fragment"
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line = fs.readline()
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header_data.line_offset += 1
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header_data.fragment_offset = header_data.line_offset
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continue
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if line.find("#[compute]") != -1:
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header_data.reading = "compute"
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line = fs.readline()
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header_data.line_offset += 1
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header_data.compute_offset = header_data.line_offset
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continue
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while line.find("#include ") != -1:
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includeline = line.replace("#include ", "").strip()[1:-1]
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if includeline.startswith("thirdparty/"):
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included_file = os.path.relpath(includeline)
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else:
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included_file = os.path.relpath(os.path.dirname(filename) + "/" + includeline)
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if not included_file in header_data.vertex_included_files and header_data.reading == "vertex":
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header_data.vertex_included_files += [included_file]
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if include_file_in_rd_header(included_file, header_data, depth + 1) is None:
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print("Error in file '" + filename + "': #include " + includeline + "could not be found!")
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elif not included_file in header_data.fragment_included_files and header_data.reading == "fragment":
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header_data.fragment_included_files += [included_file]
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if include_file_in_rd_header(included_file, header_data, depth + 1) is None:
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print("Error in file '" + filename + "': #include " + includeline + "could not be found!")
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elif not included_file in header_data.compute_included_files and header_data.reading == "compute":
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header_data.compute_included_files += [included_file]
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if include_file_in_rd_header(included_file, header_data, depth + 1) is None:
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print("Error in file '" + filename + "': #include " + includeline + "could not be found!")
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line = fs.readline()
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line = line.replace("\r", "").replace("\n", "")
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if header_data.reading == "vertex":
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header_data.vertex_lines += [line]
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if header_data.reading == "fragment":
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header_data.fragment_lines += [line]
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if header_data.reading == "compute":
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header_data.compute_lines += [line]
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line = fs.readline()
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header_data.line_offset += 1
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return header_data
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def build_rd_header(
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filename: str, optional_output_filename: Optional[str] = None, header_data: Optional[RDHeaderStruct] = None
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) -> None:
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header_data = header_data or RDHeaderStruct()
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include_file_in_rd_header(filename, header_data, 0)
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if optional_output_filename is None:
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out_file = filename + ".gen.h"
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else:
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out_file = optional_output_filename
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out_file_base = out_file
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out_file_base = out_file_base[out_file_base.rfind("/") + 1 :]
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out_file_base = out_file_base[out_file_base.rfind("\\") + 1 :]
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out_file_ifdef = out_file_base.replace(".", "_").upper()
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out_file_class = out_file_base.replace(".glsl.gen.h", "").title().replace("_", "").replace(".", "") + "ShaderRD"
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if header_data.compute_lines:
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body_parts = [
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"static const char _compute_code[] = {\n%s\n\t\t};" % generate_inline_code(header_data.compute_lines),
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f'setup(nullptr, nullptr, _compute_code, "{out_file_class}");',
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]
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else:
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body_parts = [
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"static const char _vertex_code[] = {\n%s\n\t\t};" % generate_inline_code(header_data.vertex_lines),
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"static const char _fragment_code[] = {\n%s\n\t\t};" % generate_inline_code(header_data.fragment_lines),
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f'setup(_vertex_code, _fragment_code, nullptr, "{out_file_class}");',
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]
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body_content = "\n\t\t".join(body_parts)
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# Intended curly brackets are doubled so f-string doesn't eat them up.
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shader_template = f"""/* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
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#ifndef {out_file_ifdef}_RD
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#define {out_file_ifdef}_RD
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#include "servers/rendering/renderer_rd/shader_rd.h"
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class {out_file_class} : public ShaderRD {{
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public:
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{out_file_class}() {{
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{body_content}
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}}
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}};
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#endif
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"""
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with open(out_file, "w", encoding="utf-8", newline="\n") as fd:
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fd.write(shader_template)
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def build_rd_headers(target, source, env):
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for x in source:
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build_rd_header(filename=str(x))
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class RAWHeaderStruct:
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def __init__(self):
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self.code = ""
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def include_file_in_raw_header(filename: str, header_data: RAWHeaderStruct, depth: int) -> None:
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with open(filename, "r") as fs:
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line = fs.readline()
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while line:
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while line.find("#include ") != -1:
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includeline = line.replace("#include ", "").strip()[1:-1]
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included_file = os.path.relpath(os.path.dirname(filename) + "/" + includeline)
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include_file_in_raw_header(included_file, header_data, depth + 1)
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line = fs.readline()
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header_data.code += line
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line = fs.readline()
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def build_raw_header(
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filename: str, optional_output_filename: Optional[str] = None, header_data: Optional[RAWHeaderStruct] = None
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):
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header_data = header_data or RAWHeaderStruct()
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include_file_in_raw_header(filename, header_data, 0)
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if optional_output_filename is None:
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out_file = filename + ".gen.h"
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else:
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out_file = optional_output_filename
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out_file_base = out_file.replace(".glsl.gen.h", "_shader_glsl")
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out_file_base = out_file_base[out_file_base.rfind("/") + 1 :]
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out_file_base = out_file_base[out_file_base.rfind("\\") + 1 :]
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out_file_ifdef = out_file_base.replace(".", "_").upper()
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shader_template = f"""/* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
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#ifndef {out_file_ifdef}_RAW_H
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#define {out_file_ifdef}_RAW_H
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static const char {out_file_base}[] = {{
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{generate_inline_code(header_data.code, insert_newline=False)}
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}};
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#endif
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"""
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with open(out_file, "w", encoding="utf-8", newline="\n") as f:
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f.write(shader_template)
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def build_raw_headers(target, source, env):
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for x in source:
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build_raw_header(filename=str(x))
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