add Raylib logger integration example

.github/workflows/check.yml

@@ -60,6 +60,7 @@ jobs:
           odin check math/noise/draw_texture $FLAGS
 
           odin check raylib/game_of_life $FLAGS
+          odin check raylib/log $FLAGS
           odin check raylib/microui $FLAGS
           odin check raylib/ports/shaders/shaders_mesh_instancing.odin -file $FLAGS
           odin check raylib/ports/shapes/shapes_basic_shapes.odin -file $FLAGS

raylib/log/main.odin

@@ -0,0 +1,58 @@
+package raylib_example_log
+
+import       "base:runtime"
+
+import       "core:log"
+import       "core:c"
+
+import rl    "vendor:raylib"
+import stbsp "vendor:stb/sprintf"
+
+SCREEN_WIDTH  :: 800
+SCREEN_HEIGHT :: 450
+
+g_ctx: runtime.Context
+
+main :: proc() {
+	context.logger = log.create_console_logger(.Debug)
+	g_ctx = context
+
+	rl.SetTraceLogLevel(.ALL)
+	rl.SetTraceLogCallback(proc "c" (rl_level: rl.TraceLogLevel, message: cstring, args: ^c.va_list) {
+		context = g_ctx
+
+		level: log.Level
+		switch rl_level {
+		case .TRACE, .DEBUG: level = .Debug
+		case .INFO:          level = .Info
+		case .WARNING:       level = .Warning
+		case .ERROR:         level = .Error
+		case .FATAL:         level = .Fatal
+		case .ALL, .NONE:    fallthrough
+		case:                log.panicf("unexpected log level %v", rl_level)
+		}
+
+		@static buf: [dynamic]byte
+		log_len: i32
+		for {
+			buf_len := i32(len(buf))
+			log_len = stbsp.vsnprintf(raw_data(buf), buf_len, message, args)
+			if log_len <= buf_len {
+				break
+			}
+
+			non_zero_resize(&buf, max(128, len(buf)*2))
+		}
+
+		context.logger.procedure(context.logger.data, level, string(buf[:log_len]), context.logger.options)
+	})
+
+	rl.InitWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "raylib log callback")
+	defer rl.CloseWindow()
+
+	for !rl.WindowShouldClose() {
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RAYWHITE)
+		rl.EndDrawing()
+	}
+}