feat: finish ghostty pane backend integration

1 files changed, 210 insertions, 0 deletions

diff --git a/vendor/libghostty-vt/pkg/dcimgui/build.zig b/vendor/libghostty-vt/pkg/dcimgui/build.zig
new file mode 100644
index 00000000..01a5879d
--- /dev/null
+++ b/vendor/libghostty-vt/pkg/dcimgui/build.zig
@@ -0,0 +1,210 @@
+const std = @import("std");
+const NativeTargetInfo = std.zig.system.NativeTargetInfo;
+
+pub fn build(b: *std.Build) !void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+    const freetype = b.option(bool, "freetype", "Use Freetype") orelse false;
+    const backend_opengl3 = b.option(bool, "backend-opengl3", "OpenGL3 backend") orelse false;
+    const backend_metal = b.option(bool, "backend-metal", "Metal backend") orelse false;
+    const backend_osx = b.option(bool, "backend-osx", "OSX backend") orelse false;
+
+    // Build options
+    const options = b.addOptions();
+    options.addOption(bool, "freetype", freetype);
+    options.addOption(bool, "backend_opengl3", backend_opengl3);
+    options.addOption(bool, "backend_metal", backend_metal);
+    options.addOption(bool, "backend_osx", backend_osx);
+
+    // Main static lib
+    const lib = b.addLibrary(.{
+        .name = "dcimgui",
+        .root_module = b.createModule(.{
+            .target = target,
+            .optimize = optimize,
+        }),
+        .linkage = .static,
+    });
+    lib.linkLibC();
+    // On MSVC, we must not use linkLibCpp because Zig unconditionally
+    // passes -nostdinc++ and then adds its bundled libc++/libc++abi
+    // include paths, which conflict with MSVC's own C++ runtime headers.
+    // The MSVC SDK include directories (added via linkLibC) contain
+    // both C and C++ headers, so linkLibCpp is not needed.
+    if (target.result.abi != .msvc) {
+        lib.linkLibCpp();
+    }
+    b.installArtifact(lib);
+
+    // Zig module
+    const mod = b.addModule("dcimgui", .{
+        .root_source_file = b.path("main.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+    mod.addOptions("build_options", options);
+    mod.linkLibrary(lib);
+
+    // We need to add proper Apple SDKs to find stdlib headers
+    if (target.result.os.tag.isDarwin()) {
+        if (!target.query.isNative()) {
+            try @import("apple_sdk").addPaths(b, lib);
+        }
+    }
+
+    // Flags for C compilation, common to all.
+    var flags: std.ArrayList([]const u8) = .empty;
+    defer flags.deinit(b.allocator);
+    try flags.appendSlice(b.allocator, &.{
+        "-DIMGUI_HAS_DOCK=1",
+        "-DIMGUI_USE_WCHAR32=1",
+        "-DIMGUI_DISABLE_OBSOLETE_FUNCTIONS=1",
+    });
+    if (freetype) try flags.appendSlice(b.allocator, &.{
+        "-DIMGUI_ENABLE_FREETYPE=1",
+    });
+    if (backend_opengl3) try flags.appendSlice(b.allocator, &.{
+        "-DZIGPKG_IMGUI_ENABLE_OPENGL3=1",
+    });
+    if (target.result.os.tag == .windows) {
+        try flags.appendSlice(b.allocator, &.{
+            "-DIMGUI_IMPL_API=extern\t\"C\"\t__declspec(dllexport)",
+        });
+    } else {
+        try flags.appendSlice(b.allocator, &.{
+            "-DIMGUI_IMPL_API=extern\t\"C\"",
+        });
+    }
+    if (target.result.os.tag == .freebsd or target.result.abi == .musl) {
+        try flags.append(b.allocator, "-fPIC");
+    }
+
+    // Add the core Dear Imgui source files
+    if (b.lazyDependency("imgui", .{})) |upstream| {
+        lib.addIncludePath(upstream.path(""));
+        lib.addCSourceFiles(.{
+            .root = upstream.path(""),
+            .files = &.{
+                "imgui_demo.cpp",
+                "imgui_draw.cpp",
+                "imgui_tables.cpp",
+                "imgui_widgets.cpp",
+                "imgui.cpp",
+            },
+            .flags = flags.items,
+        });
+
+        lib.installHeadersDirectory(
+            upstream.path(""),
+            "",
+            .{ .include_extensions = &.{".h"} },
+        );
+
+        if (freetype) {
+            lib.addCSourceFile(.{
+                .file = upstream.path("misc/freetype/imgui_freetype.cpp"),
+                .flags = flags.items,
+            });
+
+            if (b.systemIntegrationOption("freetype", .{})) {
+                lib.linkSystemLibrary2("freetype2", dynamic_link_opts);
+            } else {
+                const freetype_dep = b.dependency("freetype", .{
+                    .target = target,
+                    .optimize = optimize,
+                    .@"enable-libpng" = true,
+                });
+                lib.linkLibrary(freetype_dep.artifact("freetype"));
+                if (freetype_dep.builder.lazyDependency(
+                    "freetype",
+                    .{},
+                )) |freetype_upstream| {
+                    mod.addIncludePath(freetype_upstream.path("include"));
+                }
+            }
+        }
+
+        if (backend_metal) {
+            lib.addCSourceFiles(.{
+                .root = upstream.path("backends"),
+                .files = &.{"imgui_impl_metal.mm"},
+                .flags = flags.items,
+            });
+            lib.installHeadersDirectory(
+                upstream.path("backends"),
+                "",
+                .{ .include_extensions = &.{"imgui_impl_metal.h"} },
+            );
+        }
+        if (backend_osx) {
+            lib.addCSourceFiles(.{
+                .root = upstream.path("backends"),
+                .files = &.{"imgui_impl_osx.mm"},
+                .flags = flags.items,
+            });
+            lib.installHeadersDirectory(
+                upstream.path("backends"),
+                "",
+                .{ .include_extensions = &.{"imgui_impl_osx.h"} },
+            );
+        }
+        if (backend_opengl3) {
+            lib.addCSourceFiles(.{
+                .root = upstream.path("backends"),
+                .files = &.{"imgui_impl_opengl3.cpp"},
+                .flags = flags.items,
+            });
+            lib.installHeadersDirectory(
+                upstream.path("backends"),
+                "",
+                .{ .include_extensions = &.{"imgui_impl_opengl3.h"} },
+            );
+        }
+    }
+
+    // Add the C bindings
+    if (b.lazyDependency("bindings", .{})) |upstream| {
+        lib.addIncludePath(upstream.path(""));
+        lib.addCSourceFiles(.{
+            .root = upstream.path(""),
+            .files = &.{
+                "dcimgui.cpp",
+                "dcimgui_internal.cpp",
+            },
+            .flags = flags.items,
+        });
+        lib.addCSourceFiles(.{
+            .root = b.path(""),
+            .files = &.{"ext.cpp"},
+            .flags = flags.items,
+        });
+
+        lib.installHeadersDirectory(
+            upstream.path(""),
+            "",
+            .{ .include_extensions = &.{".h"} },
+        );
+    }
+
+    const test_exe = b.addTest(.{
+        .name = "test",
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("main.zig"),
+            .target = target,
+            .optimize = optimize,
+        }),
+    });
+    test_exe.root_module.addOptions("build_options", options);
+    test_exe.linkLibrary(lib);
+    const tests_run = b.addRunArtifact(test_exe);
+    const test_step = b.step("test", "Run tests");
+    test_step.dependOn(&tests_run.step);
+}
+
+// For dynamic linking, we prefer dynamic linking and to search by
+// mode first. Mode first will search all paths for a dynamic library
+// before falling back to static.
+const dynamic_link_opts: std.Build.Module.LinkSystemLibraryOptions = .{
+    .preferred_link_mode = .dynamic,
+    .search_strategy = .mode_first,
+};