support full screen gameplay

game/app.odin

@@ -3,29 +3,30 @@ package game
 import rl "vendor:raylib"
 
 run :: proc() {
-	rl.InitWindow(SCREEN_W, SCREEN_H, "Tower Defense")
-	defer rl.CloseWindow()
-	rl.SetTargetFPS(60)
+	init_display()
+	defer {
+		shutdown_display()
+		rl.CloseWindow()
+	}
 
 	world := init_world()
+	defer {
+		delete(world.path)
+		delete(world.towers)
+		delete(world.events)
+	}
 
 	for !rl.WindowShouldClose() {
 		dt := rl.GetFrameTime()
 
+		update_display()
 		update_world(&world, dt)
 
-		rl.BeginDrawing()
-		rl.ClearBackground(rl.Color{34, 139, 34, 255})
-
+		begin_game_draw()
 		render_world(&world)
 		render_overlay(&world)
 		render_controls(&world)
-		rl.EndDrawing()
+		end_game_draw()
 	}
-
-	delete(world.path)
-	delete(world.towers)
-	delete(world.events)
-
 }
 

game/commands.odin

@@ -23,7 +23,7 @@ gather_commands :: proc(world: ^World) -> Command {
 	}
 
 	if world.phase == .Build && rl.IsMouseButtonPressed(.LEFT) {
-		mouse := rl.GetMousePosition()
+		mouse := game_mouse()
 		gx, gy := screen_to_grid(mouse.x, mouse.y)
 		return Command{kind = .Place_Tower, gx = gx, gy = gy}
 	}

game/constants.odin

@@ -9,6 +9,9 @@ TILE_SIZE :: 32 // size of tiles in pixels
 SCREEN_W :: MAP_W * TILE_SIZE
 SCREEN_H :: MAP_H * TILE_SIZE
 
+DEFAULT_WINDOW_W :: 1280
+DEFAULT_WINDOW_H :: 720
+
 MAX_ENEMIES :: 64
 MAX_WAVES :: 5
 MAX_TOWERS :: 32

game/controls.odin

@@ -22,7 +22,7 @@ build_controls_layout :: proc() -> (archer, start_wave_btn: rl.Rectangle) {
 poll_controls_command :: proc(world: ^World) -> Command {
 	if world.phase != .Build do return Command{kind = .None}
 
-	mouse := rl.GetMousePosition()
+	mouse := game_mouse()
 	if rl.IsMouseButtonPressed(.LEFT) {
 		archer, start_wave := build_controls_layout()
 		if rl.CheckCollisionPointRec(mouse, archer) {
@@ -38,7 +38,7 @@ poll_controls_command :: proc(world: ^World) -> Command {
 
 draw_archer_button :: proc(world: ^World, archer: rl.Rectangle) {
 	arch := get_archetype(.Archer)
-	mouse := rl.GetMousePosition()
+	mouse := game_mouse()
 
 	arch_bg := CONTROLS_SHOP_IDLE
 	if world.selected_tower == .Archer do arch_bg = CONTROL_SHOP_SELECTED
@@ -57,7 +57,7 @@ draw_start_wave_button :: proc(start_wave_rect: rl.Rectangle, mouse: rl.Vector2)
 
 draw_build_controls :: proc(world: ^World) {
 	if world.phase != .Build do return
-	mouse := rl.GetMousePosition()
+	mouse := game_mouse()
 
 	bar_y := bottom_bar_y()
 	rl.DrawRectangle(0, bar_y, SCREEN_W, CONTROL_BAR_H, CONTROL_BAR_BG)

game/display.odin

@@ -0,0 +1,62 @@
+package game
+
+import rl "vendor:raylib"
+
+game_target: rl.RenderTexture2D
+
+init_display :: proc() {
+	rl.InitWindow(DEFAULT_WINDOW_W, DEFAULT_WINDOW_H, "Tower Defense")
+	rl.SetWindowState({.WINDOW_RESIZABLE})
+	rl.SetTargetFPS(60)
+	game_target = rl.LoadRenderTexture(i32(SCREEN_W), i32(SCREEN_H))
+}
+
+shutdown_display :: proc() {
+	rl.UnloadRenderTexture(game_target)
+}
+
+update_display :: proc() {
+	if rl.IsKeyPressed(.F11) {
+		rl.ToggleFullscreen()
+	}
+}
+
+game_viewport_dest :: proc() -> rl.Rectangle {
+	sw := f32(rl.GetRenderWidth())
+	sh := f32(rl.GetRenderHeight())
+	scale := min(sw / f32(SCREEN_W), sh / f32(SCREEN_H))
+	dw := f32(SCREEN_W) * scale
+	dh := f32(SCREEN_H) * scale
+	return {x = (sw - dw) * 0.5, y = (sh - dh) * 0.5, width = dw, height = dh}
+}
+
+game_mouse :: proc() -> rl.Vector2 {
+	m := rl.GetMousePosition()
+	dest := game_viewport_dest()
+	if dest.width <= 0 || dest.height <= 0 {
+		return m
+	}
+	return {
+		(m.x - dest.x) / dest.width * f32(SCREEN_W),
+		(m.y - dest.y) / dest.height * f32(SCREEN_H),
+	}
+}
+
+begin_game_draw :: proc() {
+	rl.BeginTextureMode(game_target)
+	rl.ClearBackground(rl.Color{34, 139, 34, 255})
+}
+
+end_game_draw :: proc() {
+	rl.EndTextureMode()
+
+	rl.BeginDrawing()
+	rl.ClearBackground(rl.BLACK)
+
+	dest := game_viewport_dest()
+	source := rl.Rectangle{0, 0, f32(SCREEN_W), -f32(SCREEN_H)}
+	rl.DrawTexturePro(game_target.texture, source, dest, {}, 0, rl.WHITE)
+
+	rl.EndDrawing()
+}
+