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Cross-compilation #476

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Cross-compilation #476

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20 changes: 17 additions & 3 deletions samples/minimal_d3d12/build.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ const builtin = @import("builtin");
const std = @import("std");

const Options = @import("../../build.zig").Options;
const content_dir = "minimal_d3d12_content/";

pub fn build(b: *std.Build, options: Options) *std.Build.Step.Compile {
const exe = b.addExecutable(.{
Expand All @@ -18,10 +19,23 @@ pub fn build(b: *std.Build, options: Options) *std.Build.Step.Compile {
});
exe.root_module.addImport("zwin32", zwin32.module("root"));

const exe_options = b.addOptions();
exe.root_module.addOptions("build_options", exe_options);
exe_options.addOption([]const u8, "content_dir", content_dir);

const install_content_step = b.addInstallDirectory(.{
.source_dir = .{ .path = thisDir() ++ "/" ++ content_dir },
.install_dir = .{ .custom = "" },
.install_subdir = "bin/" ++ content_dir,
});
if (builtin.os.tag == .windows or builtin.os.tag == .linux) {
const dxc_step = buildShaders(b);
const dxc_step = buildShaders(
b,
);
exe.step.dependOn(dxc_step);
install_content_step.step.dependOn(dxc_step);
}
exe.step.dependOn(&install_content_step.step);

// This is needed to export symbols from an .exe file.
// We export D3D12SDKVersion and D3D12SDKPath symbols which
Expand All @@ -37,8 +51,8 @@ pub fn build(b: *std.Build, options: Options) *std.Build.Step.Compile {
fn buildShaders(b: *std.Build) *std.Build.Step {
const dxc_step = b.step("minimal_d3d12-dxc", "Build shaders for 'minimal d3d12' demo");

makeDxcCmd(b, dxc_step, "src/minimal_d3d12.hlsl", "vsMain", "minimal_d3d12.vs.cso", "vs", "");
makeDxcCmd(b, dxc_step, "src/minimal_d3d12.hlsl", "psMain", "minimal_d3d12.ps.cso", "ps", "");
makeDxcCmd(b, dxc_step, "src/minimal_d3d12.hlsl", "vsMain", "../" ++ content_dir ++ "minimal_d3d12.vs.cso", "vs", "");
makeDxcCmd(b, dxc_step, "src/minimal_d3d12.hlsl", "psMain", "../" ++ content_dir ++ "minimal_d3d12.ps.cso", "ps", "");

return dxc_step;
}
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Empty file added samples/minimal_d3d12/minimal_d3d12_content/.gitkeep
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26 changes: 22 additions & 4 deletions samples/minimal_d3d12/src/minimal_d3d12.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,8 @@ fn createWindow(width: u32, height: u32) w32.HWND {
}

pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};

_ = w32.CoInitializeEx(null, w32.COINIT_MULTITHREADED);
defer w32.CoUninitialize();

Expand All @@ -97,17 +99,33 @@ pub fn main() !void {
defer dx12.deinit();

const root_signature: *d3d12.IRootSignature, const pipeline: *d3d12.IPipelineState = blk: {
const vs_cso = @embedFile("./minimal_d3d12.vs.cso");
const ps_cso = @embedFile("./minimal_d3d12.ps.cso");
var arena = std.heap.ArenaAllocator.init(gpa.allocator());
defer arena.deinit();

const self_exe_dir_path = std.fs.selfExeDirPathAlloc(arena.allocator()) catch unreachable;

const ps_cso = readVsCode: {
const abspath = std.fs.path.join(arena.allocator(), &.{ self_exe_dir_path, "/minimal_d3d12.vs.cso" }) catch unreachable;
const vs_file = std.fs.openFileAbsolute(abspath, .{}) catch unreachable;
defer vs_file.close();
break :readVsCode vs_file.reader().readAllAlloc(arena.allocator(), 256 * 1024) catch unreachable;
};

const vs_cso = readPsCode: {
const abspath = std.fs.path.join(arena.allocator(), &.{ self_exe_dir_path, "/minimal_d3d12.ps.cso" }) catch unreachable;
const ps_file = std.fs.openFileAbsolute(abspath, .{}) catch unreachable;
defer ps_file.close();
break :readPsCode ps_file.reader().readAllAlloc(arena.allocator(), 256 * 1024) catch unreachable;
};

var pso_desc = d3d12.GRAPHICS_PIPELINE_STATE_DESC.initDefault();
pso_desc.DepthStencilState.DepthEnable = w32.FALSE;
pso_desc.RTVFormats[0] = .R8G8B8A8_UNORM;
pso_desc.NumRenderTargets = 1;
pso_desc.BlendState.RenderTarget[0].RenderTargetWriteMask = 0xf;
pso_desc.PrimitiveTopologyType = .TRIANGLE;
pso_desc.VS = .{ .pShaderBytecode = vs_cso, .BytecodeLength = vs_cso.len };
pso_desc.PS = .{ .pShaderBytecode = ps_cso, .BytecodeLength = ps_cso.len };
pso_desc.VS = .{ .pShaderBytecode = vs_cso.ptr, .BytecodeLength = vs_cso.len };
pso_desc.PS = .{ .pShaderBytecode = ps_cso.ptr, .BytecodeLength = ps_cso.len };

var root_signature: *d3d12.IRootSignature = undefined;
hrPanicOnFail(dx12.device.CreateRootSignature(
Expand Down