examples.clear source code

1 //------------------------------------------------------------------------------
2 //  clear.d
3 //
4 //  Just clear the framebuffer with an animated color.
5 //------------------------------------------------------------------------------
6 module examples.clear;
7 
8 private:
9 
10 import sg = sokol.gfx;
11 import sglue = sokol.glue;
12 import sapp = sokol.app;
13 import log = sokol.log;
14 
15 extern (C):
16 @safe:
17 
18 sg.PassAction pass_action = {
19     colors: [
20         {load_action: sg.LoadAction.Clear, clear_value: {r: 1, g: 1, b: 0, a: 1}}
21     ]
22 };
23 
24 static void init()
25 {
26     sg.Desc gfx = {
27         environment: sglue.environment(),
28         logger: {func: &log.slog_func},
29     };
30     sg.setup(gfx);
31 
32     version (WebAssembly)
33     { /* none */ }
34     else version (D_BetterC)
35     { /* none */ }
36     else
37     {
38         import std.stdio : writeln;
39 
40         debug writeln("Backend: ", sg.queryBackend());
41     }
42 }
43 
44 static void frame()
45 {
46     const g = pass_action.colors[0].clear_value.g + 0.01;
47     pass_action.colors[0].clear_value.g = g > 1.0 ? 0.0 : g;
48     sg.Pass pass = {action: pass_action, swapchain: sglue.swapchain};
49     sg.beginPass(pass);
50     sg.endPass();
51     sg.commit();
52 }
53 
54 static void cleanup()
55 {
56     sg.shutdown();
57 }
58 
59 void main()
60 {
61     sapp.Desc runner = {
62         window_title: "clear.d",
63         init_cb: &init,
64         frame_cb: &frame,
65         cleanup_cb: &cleanup,
66         width: 640,
67         height: 480,
68         win32_console_attach: true,
69         icon: {sokol_default: true},
70         logger: {func: &log.func}
71     };
72     sapp.run(runner);
73 }