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const use_docking = @import("build_options").docking;
const ig = if (use_docking) @import("cimgui_docking") else @import("cimgui");
const sokol = @import("sokol");
const slog = sokol.log;
const sg = sokol.gfx;
const sapp = sokol.app;
const sglue = sokol.glue;
const simgui = sokol.imgui;
const shd = @import("shader/quad.glsl.zig");
const state = struct {
var bind: sg.Bindings = .{};
var pip: sg.Pipeline = .{};
var pass_action: sg.PassAction = .{};
var show_first_window: bool = true;
var show_second_window: bool = true;
};
export fn init() void {
// initialize sokol-gfx
sg.setup(.{
.environment = sglue.environment(),
.logger = .{ .func = slog.func },
});
// initialize sokol-imgui
simgui.setup(.{
.logger = .{ .func = slog.func },
});
if (use_docking) {
ig.igGetIO().*.ConfigFlags |= ig.ImGuiConfigFlags_DockingEnable;
}
// a vertex buffer
state.bind.vertex_buffers[0] = sg.makeBuffer(.{
.data = sg.asRange(&[_]f32{
// positions colors
-0.5, 0.5, 0.5, 1.0, 0.0, 0.0, 1.0,
0.5, 0.5, 0.5, 0.0, 1.0, 0.0, 1.0,
0.5, -0.5, 0.5, 0.0, 0.0, 1.0, 1.0,
-0.5, -0.5, 0.5, 1.0, 1.0, 0.0, 1.0,
}),
});
// an index buffer
state.bind.index_buffer = sg.makeBuffer(.{
.usage = .{ .index_buffer = true },
.data = sg.asRange(&[_]u16{ 0, 1, 2, 0, 2, 3 }),
});
// a shader and pipeline state object
state.pip = sg.makePipeline(.{
.shader = sg.makeShader(shd.quadShaderDesc(sg.queryBackend())),
.layout = init: {
var l = sg.VertexLayoutState{};
l.attrs[shd.ATTR_quad_position].format = .FLOAT3;
l.attrs[shd.ATTR_quad_color0].format = .FLOAT4;
break :init l;
},
.index_type = .UINT16,
});
// initial clear color
state.pass_action.colors[0] = .{
.load_action = .CLEAR,
.clear_value = .{ .r = 0.0, .g = 0.5, .b = 1.0, .a = 1.0 },
};
}
export fn frame() void {
// call simgui.newFrame() before any ImGui calls
simgui.newFrame(.{
.width = sapp.width(),
.height = sapp.height(),
.delta_time = sapp.frameDuration(),
.dpi_scale = sapp.dpiScale(),
});
if (ig.igBegin("Hello Dear ImGui!", &state.show_first_window, ig.ImGuiWindowFlags_None)) {
_ = ig.igColorEdit3("Background", &state.pass_action.colors[0].clear_value.r, ig.ImGuiColorEditFlags_None);
_ = ig.igText("Dear ImGui Version: %s", ig.IMGUI_VERSION);
ig.igEnd();
}
// call simgui.render() inside a sokol-gfx pass
sg.beginPass(.{ .action = state.pass_action, .swapchain = sglue.swapchain() });
sg.applyPipeline(state.pip);
sg.applyBindings(state.bind);
sg.draw(0, 6, 1);
simgui.render();
sg.endPass();
sg.commit();
}
export fn cleanup() void {
simgui.shutdown();
sg.shutdown();
}
export fn event(ev: [*c]const sapp.Event) void {
// forward input events to sokol-imgui
_ = simgui.handleEvent(ev.*);
}
pub fn main() void {
sapp.run(.{
.init_cb = init,
.frame_cb = frame,
.cleanup_cb = cleanup,
.event_cb = event,
.window_title = "sokol-zig + Dear Imgui",
.width = 800,
.height = 600,
.icon = .{ .sokol_default = true },
.logger = .{ .func = slog.func },
});
}
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