Hoildkv
1 year ago
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3 changed files with 140 additions and 0 deletions
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-- Compile bgfx shader files. Substitution for scripts/shader.mk. |
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-- |
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-- Usage: |
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-- |
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-- add_rules("@bgfx/shaders") |
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-- add_files("shader.vert", {type = "vertex", output_dir = "shaders", output_name = "shader.vert.bin", profiles = {glsl = "330"}}) |
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|
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rule("shaders") |
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set_extensions(".vert", ".frag", ".comp") |
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on_buildcmd_file(function (target, batchcmds, shaderfile, opt) |
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import("lib.detect.find_program") |
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import("core.base.option") |
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batchcmds:show_progress(opt.progress, "${color.build.object}compiling.shaderc %s", shaderfile) |
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-- get bgfx shaderc |
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local shaderc = find_program("shadercRelease") or find_program("shadercDebug") |
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assert(shaderc, "bgfx shaderc not found! please check your bgfx installation.") |
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|
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-- determine arguments for shaderc from fileconfig |
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local fileconfig = target:fileconfig(shaderfile) |
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local output_filename |
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if fileconfig and fileconfig.output_name then |
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output_filename = fileconfig.output_name |
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else |
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output_filename = path.filename(shaderfile) .. ".bin" |
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end |
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local output_dir |
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if fileconfig and fileconfig.output_dir then |
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output_dir = fileconfig.output_dir |
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else |
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output_dir = "shaders" |
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end |
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|
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local vardef_filename |
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if fileconfig and fileconfig.vardef then |
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vardef_filename = fileconfig.vardef |
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else |
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vardef_filename = path.join( |
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path.directory(shaderfile), |
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path.basename(shaderfile) .. ".varying.def.sc") |
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end |
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|
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local shader_type |
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if fileconfig and fileconfig.type then |
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if table.contains(bgfx_types, fileconfig.type) then |
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shader_type = fileconfig.type |
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else |
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raise("unsupported shader type " .. fileconfig.type) |
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end |
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elseif shaderfile:match("%.vert$") then |
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shader_type = "vertex" |
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elseif shaderfile:match("%.frag$") then |
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shader_type = "fragment" |
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elseif shaderfile:match("%.comp$") then |
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shader_type = "compute" |
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else |
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raise("cannot determine shader type from file name " .. path.filename(shaderfile)) |
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end |
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|
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-- determine platform-specific shaderc arguments |
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local bgfx_platforms = { |
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windows = "windows", |
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macosx = "osx", |
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linux = "linux" |
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} |
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local bgfx_types = { |
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"vertex", |
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"fragment", |
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"compute" |
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} |
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local bgfx_default_profiles = { |
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windows = { |
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vertex = {dx9 = "vs_3_0", dx11 = "vs_5_0", glsl = "120"}, |
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fragment = {dx9 = "ps_3_0", dx11 = "ps_5_0", glsl = "120"}, |
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compute = {dx11 = "cs_5_0", glsl = "430"}, |
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}, |
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macosx = { |
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vertex = {metal = "metal", glsl = "120"}, |
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fragment = {metal = "metal", glsl = "120"}, |
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compute = {metal = "metal", glsl = "430"} |
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}, |
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linux = { |
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vertex = {glsl = "120", spirv = "spirv"}, |
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fragment = {glsl = "120", spirv = "spirv"}, |
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compute = {glsl = "430", spirv = "spirv"} |
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} |
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} |
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|
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-- build command args |
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local args = { |
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"-f", shaderfile, |
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"--type", shader_type, |
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"--varyingdef", vardef_filename, |
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"--platform", bgfx_platforms[target:plat()], |
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} |
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for _, includedir in ipairs(target:get("includedirs")) do |
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table.insert(args, "-i") |
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table.insert(args, includedir) |
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end |
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local mtime = 0 |
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local shader_profiles |
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if fileconfig and fileconfig.profiles then |
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shader_profiles = fileconfig.profiles |
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else |
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shader_profiles = bgfx_default_profiles[target:plat()][shader_type] |
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end |
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for folder, profile in pairs(shader_profiles) do |
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-- set output dir |
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local outputdir = path.join(target:targetdir(), output_dir, folder) |
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batchcmds:mkdir(outputdir) |
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local binary = path.join(outputdir, output_filename) |
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-- compiling |
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local real_args = {} |
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table.join2(real_args, args) |
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table.insert(real_args, "-o") |
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table.insert(real_args, binary) |
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table.insert(real_args, "--profile") |
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table.insert(real_args, profile) |
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if option.get("verbose") then |
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batchcmds:show(shaderc .. " " .. os.args(real_args)) |
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end |
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batchcmds:vrunv(shaderc, real_args) |
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if (mtime == 0) then mtime = os.mtime(binary) end |
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end |
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-- add deps |
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batchcmds:add_depfiles(shaderfile) |
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batchcmds:set_depmtime(mtime) |
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end) |
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