src/core: move mach-core@9a4d09707d9f1cb6ea5602bdf58caeefc46146be package to here

Helps hexops/mach#1165

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

src/core/examples/sysgpu/procedural-primitives/main.zig

@@ -0,0 +1,66 @@
+const std = @import("std");
+const core = @import("mach").core;
+const gpu = core.gpu;
+const renderer = @import("renderer.zig");
+
+pub const App = @This();
+
+pub const mach_core_options = core.ComptimeOptions{
+    .use_wgpu = false,
+    .use_sysgpu = true,
+};
+var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+
+title_timer: core.Timer,
+
+pub fn init(app: *App) !void {
+    try core.init(.{ .required_limits = gpu.Limits{
+        .max_vertex_buffers = 1,
+        .max_vertex_attributes = 2,
+        .max_bind_groups = 1,
+        .max_uniform_buffers_per_shader_stage = 1,
+        .max_uniform_buffer_binding_size = 16 * 1 * @sizeOf(f32),
+    } });
+
+    const allocator = gpa.allocator();
+    const timer = try core.Timer.start();
+    try renderer.init(allocator, timer);
+    app.* = .{ .title_timer = try core.Timer.start() };
+}
+
+pub fn deinit(app: *App) void {
+    _ = app;
+    defer _ = gpa.deinit();
+    defer core.deinit();
+    defer renderer.deinit();
+}
+
+pub fn update(app: *App) !bool {
+    var iter = core.pollEvents();
+    while (iter.next()) |event| {
+        switch (event) {
+            .key_press => |ev| {
+                if (ev.key == .space) return true;
+                if (ev.key == .right) {
+                    renderer.curr_primitive_index += 1;
+                    renderer.curr_primitive_index %= 7;
+                }
+            },
+            .close => return true,
+            else => {},
+        }
+    }
+
+    renderer.update();
+
+    // update the window title every second
+    if (app.title_timer.read() >= 1.0) {
+        app.title_timer.reset();
+        try core.printTitle("Procedural Primitives [ {d}fps ] [ Input {d}hz ]", .{
+            core.frameRate(),
+            core.inputRate(),
+        });
+    }
+
+    return false;
+}