From 299541430caa2779e212b94072e2419fe9c474b8 Mon Sep 17 00:00:00 2001
From: Tobias Frisch <tfrisch@uni-koblenz.de>
Date: Mon, 19 Jul 2021 17:55:47 +0200
Subject: [PATCH] [#100] Adjusted cmake magic to process shaders into source
files
Signed-off-by: Tobias Frisch <tfrisch@uni-koblenz.de>
---
config/ext/IncludeShader.cmake | 100 ++++++++++++++++++++++-----------
1 file changed, 67 insertions(+), 33 deletions(-)
diff --git a/config/ext/IncludeShader.cmake b/config/ext/IncludeShader.cmake
index 7eea0df4..e67a8716 100644
--- a/config/ext/IncludeShader.cmake
+++ b/config/ext/IncludeShader.cmake
@@ -1,41 +1,75 @@
function(include_shader shader include_dir source_dir)
- get_filename_component(filename ${shader} NAME)
- file(SIZE ${shader} filesize)
-
- string(TOUPPER ${filename} varname)
- string(REPLACE "." "_" varname ${varname})
-
- set(shader_header "")
- string(APPEND shader_header "#pragma once\n")
- string(APPEND shader_header "extern unsigned char ${varname} [${filesize}]\;\n")
- string(APPEND shader_header "extern unsigned int ${varname}_LEN\;\n")
- string(APPEND shader_header "const std::string ${varname}_SHADER (reinterpret_cast<const char*>(${varname}), ${varname}_LEN)\;")
-
- set(shader_source "")
- string(APPEND shader_source "unsigned char ${varname}[] = {")
-
- math(EXPR max_fileoffset "${filesize} - 1" OUTPUT_FORMAT DECIMAL)
-
- foreach(fileoffset RANGE ${max_fileoffset})
- file(READ ${shader} shader_source_byte OFFSET ${fileoffset} LIMIT 1 HEX)
+ if (NOT EXISTS ${shader})
+ message(WARNING "Shader file does not exist: ${shader}")
+ else()
+ get_filename_component(filename ${shader} NAME)
+ file(SIZE ${shader} filesize)
- math(EXPR offset_modulo "${fileoffset} % 12" OUTPUT_FORMAT DECIMAL)
+ set(include_target_file ${include_dir}/${filename}.hxx)
+ set(source_target_file ${source_dir}/${filename}.cxx)
- if (${offset_modulo} EQUAL 0)
- string(APPEND shader_source "\n ")
+ if ((EXISTS ${source_target_file}) AND (EXISTS ${include_target_file}))
+ file(TIMESTAMP ${shader} shader_timestamp "%Y-%m-%dT%H:%M:%S")
+ file(TIMESTAMP ${source_target_file} source_timestamp "%Y-%m-%dT%H:%M:%S")
+
+ string(COMPARE GREATER ${shader_timestamp} ${source_timestamp} shader_update)
+ else()
+ set(shader_update true)
endif()
- if (${fileoffset} LESS ${max_fileoffset})
- string(APPEND shader_source "0x${shader_source_byte}, ")
- else()
- string(APPEND shader_source "0x${shader_source_byte}\n")
+ if (shader_update)
+ string(TOUPPER ${filename} varname)
+ string(REPLACE "." "_" varname ${varname})
+
+ set(shader_header "#pragma once\n")
+ string(APPEND shader_header "// This file is auto-generated via cmake, so don't touch it!\n")
+ string(APPEND shader_header "extern unsigned char ${varname} [${filesize}]\;\n")
+ string(APPEND shader_header "extern unsigned int ${varname}_LEN\;\n")
+ string(APPEND shader_header "const std::string ${varname}_SHADER (reinterpret_cast<const char*>(${varname}), ${varname}_LEN)\;")
+
+ file(WRITE ${include_target_file} ${shader_header})
+
+ find_program(xxd_program "xxd")
+
+ if (EXISTS ${xxd_program})
+ get_filename_component(shader_directory ${shader} DIRECTORY)
+
+ add_custom_command(
+ OUTPUT ${source_target_file}
+ WORKING_DIRECTORY "${shader_directory}"
+ COMMAND xxd -i -C "${filename}" "${source_target_file}"
+ COMMENT "Processing shader into source files: ${shader}"
+ )
+ else()
+ set(shader_source "// This file is auto-generated via cmake, so don't touch it!\n")
+ string(APPEND shader_source "unsigned char ${varname}[] = {")
+
+ math(EXPR max_fileoffset "${filesize} - 1" OUTPUT_FORMAT DECIMAL)
+
+ message(STATUS "Processing shader into source files: ${shader}")
+
+ foreach(fileoffset RANGE ${max_fileoffset})
+ file(READ ${shader} shader_source_byte OFFSET ${fileoffset} LIMIT 1 HEX)
+
+ math(EXPR offset_modulo "${fileoffset} % 12" OUTPUT_FORMAT DECIMAL)
+
+ if (${offset_modulo} EQUAL 0)
+ string(APPEND shader_source "\n ")
+ endif()
+
+ if (${fileoffset} LESS ${max_fileoffset})
+ string(APPEND shader_source "0x${shader_source_byte}, ")
+ else()
+ string(APPEND shader_source "0x${shader_source_byte}\n")
+ endif()
+ endforeach()
+
+ string(APPEND shader_source "}\;\n")
+ string(APPEND shader_source "unsigned int ${varname}_LEN = ${filesize}\;")
+
+ file(WRITE ${source_target_file} ${shader_source})
+ endif()
endif()
- endforeach()
-
- string(APPEND shader_source "}\;\n")
- string(APPEND shader_source "unsigned int ${varname}_LEN = ${filesize}\;")
-
- file(WRITE ${include_dir}/${filename}.hxx ${shader_header})
- file(WRITE ${source_dir}/${filename}.cxx ${shader_source})
+ endif()
endfunction()
--
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