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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @author ruki
-- @file xmake.lua
--
-- compile glsl shader to spirv file, .spv
--
-- e.g.
-- compile *.vert/*.frag to *.vert.spv/*.frag.spv files
-- add_rules("utils.glsl2spv", {outputdir = "build"})
--
-- compile *.vert/*.frag and generate binary c header files
-- add_rules("utils.glsl2spv", {bin2c = true})
--
-- compile *.vert/*.frag and generate object files for direct linking
-- add_rules("utils.glsl2spv", {bin2obj = true})
--
-- in c code (bin2c):
-- static unsigned char g_test_frag_spv_data[] = {
-- #include "test.frag.spv.h"
-- };
--
-- in c code (bin2obj):
-- extern const uint8_t _binary_test_frag_spv_start[];
-- extern const uint8_t _binary_test_frag_spv_end[];
-- const uint32_t size = (uint32_t)(_binary_test_frag_spv_end - _binary_test_frag_spv_start);
--
--
rule("utils.glsl2spv")
set_extensions(".vert", ".tesc", ".tese", ".geom", ".comp", ".frag", ".comp", ".mesh", ".task", ".rgen", ".rint", ".rahit", ".rchit", ".rmiss", ".rcall", ".glsl")
on_load(function (target)
local is_bin2c = target:extraconf("rules", "utils.glsl2spv", "bin2c")
if is_bin2c then
local headerdir = path.join(target:autogendir(), "rules", "utils", "glsl2spv")
if not os.isdir(headerdir) then
os.mkdir(headerdir)
end
target:add("includedirs", headerdir)
end
end)
before_buildcmd_file(function (target, batchcmds, sourcefile_glsl, opt)
import("lib.detect.find_tool")
import("rules.utils.bin2obj.utils", {alias = "bin2obj_utils", rootdir = os.programdir()})
import("rules.utils.bin2c.utils", {alias = "bin2c_utils", rootdir = os.programdir()})
-- get glslangValidator
local glslc
local glslangValidator = find_tool("glslangValidator")
if not glslangValidator then
glslc = find_tool("glslc")
end
assert(glslangValidator or glslc, "glslangValidator or glslc not found!")
-- glsl to spv
local targetenv = target:extraconf("rules", "utils.glsl2spv", "targetenv") or "vulkan1.0"
local client = target:extraconf("rules", "utils.glsl2spv", "client") or "vulkan100"
local debugsource = target:extraconf("rules", "utils.glsl2spv", "debugsource") or false
local outputdir = target:extraconf("rules", "utils.glsl2spv", "outputdir") or path.join(target:autogendir(), "rules", "utils", "glsl2spv")
local spvfilepath = path.join(outputdir, path.filename(sourcefile_glsl) .. ".spv")
batchcmds:show_progress(opt.progress, "${color.build.object}generating.glsl2spv %s", sourcefile_glsl)
batchcmds:mkdir(outputdir)
if glslangValidator then
if debugsource then
batchcmds:vrunv(glslangValidator.program, {"--target-env", targetenv, "--client", client, "-gVS", "-o", path(spvfilepath), path(sourcefile_glsl)})
else
batchcmds:vrunv(glslangValidator.program, {"--target-env", targetenv, "--client", client, "-o", path(spvfilepath), path(sourcefile_glsl)})
end
else
batchcmds:vrunv(glslc.program, {"--target-env", targetenv, "-o", path(spvfilepath), path(sourcefile_glsl)})
end
-- do bin2c or bin2obj
local outputfile = spvfilepath
local is_bin2c = target:extraconf("rules", "utils.glsl2spv", "bin2c")
local is_bin2obj = target:extraconf("rules", "utils.glsl2spv", "bin2obj")
if is_bin2c then
-- generate header file
-- note: explicitly disable zeroend (SPIR-V is binary format, not null-terminated string)
local headerfile = bin2c_utils.generate_headerfile(target, batchcmds, spvfilepath, {
progress = opt.progress,
headerdir = outputdir,
zeroend = false -- SPIR-V is binary format, not null-terminated string
})
outputfile = headerfile
elseif is_bin2obj then
-- convert to object file using bin2obj
-- note: zeroend is false by default (SPIR-V is binary format, not null-terminated string)
local objectfile = bin2obj_utils.generate_objectfile(target, batchcmds, spvfilepath, {
progress = opt.progress,
rulename = "utils.glsl2spv" -- pass current rule name for config lookup
})
outputfile = objectfile
end
-- add deps
batchcmds:add_depfiles(sourcefile_glsl)
batchcmds:set_depmtime(os.mtime(outputfile))
batchcmds:set_depcache(target:dependfile(outputfile))
end)
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