examples: tetris: draw score

examples/tetris/tetris.v

@@ -9,6 +9,7 @@ import gl
 import gg
 import glfw
 import math
+import freetype
 
 const (
 	BlockSize = 20 // pixels
@@ -80,6 +81,8 @@ struct Block {
 
 struct Game {
 	mut:
+	// Score of the current game
+	score        int
 	// Position of the current tetro
 	pos_x        int
 	pos_y        int
@@ -100,6 +103,10 @@ struct Game {
 	rotation_idx int
 	// gg context for drawing
 	gg          *gg.GG
+	// ft context for font drawing
+	ft          *freetype.Context
+	// gx text config for font drawing
+	tcfg        *gx.TextCfg
 }
 
 fn main() {
@@ -113,12 +120,29 @@ fn main() {
 			window_title: 'V Tetris'
 			window_user_ptr: game
 		})
+		ft: 0
+		tcfg: 0
 	}
 	game.gg.window.set_user_ptr(game) // TODO remove this when `window_user_ptr:` works 
 	game.init_game()
 	game.gg.window.onkeydown(key_down)
 	go game.run() // Run the game loop in a new thread
 	gg.clear(gx.White)
+	// Try to load font
+	game.ft = freetype.new_context(gg.Cfg{
+			width: WinWidth
+			height: WinHeight
+			use_ortho: true
+			font_size: 18
+		}, 1)
+	if game.ft != 0 {
+	        // if font loaded, define default font color etc..
+		game.tcfg = &gx.TextCfg{
+			align:gx.ALIGN_LEFT
+			size:12
+			color:gx.rgb(0, 0, 170)
+		}
+	}
 	for {
 		gg.clear(gx.White)
 		game.draw_scene()
@@ -148,6 +172,7 @@ fn (g mut Game) init_game() {
 		first_row[j] = - 1
 		last_row[j] = - 1
 	}
+	g.score = 0
 }
 
 fn (g mut Game) parse_tetros() {
@@ -222,6 +247,7 @@ fn (g mut Game) delete_completed_line(y int) {
 			return
 		}
 	}
+	g.score += 10
 	// Move everything down by 1 position
 	for yy := y - 1; yy >= 1; yy-- {
 		for x := 1; x <= FieldWidth; x++ {
@@ -282,9 +308,16 @@ fn (g &Game) draw_field() {
 	}
 }
 
+fn (g &Game) draw_score() {
+	if g.tcfg != 0 {
+		g.ft.draw_text(1, 2, 'score: ' + g.score.str(), g.tcfg)
+	}
+}
+
 fn (g &Game) draw_scene() {
 	g.draw_tetro()
 	g.draw_field()
+	g.draw_score()
 }
 
 fn parse_binary_tetro(t_ int) []Block {
@@ -348,4 +381,3 @@ fn key_down(wnd voidptr, key, code, action, mods int) {
 		game.move_tetro() // drop faster when the player presses <down>
 	}
 }
-

vlib/freetype/freetype.v

@@ -160,7 +160,7 @@ pub fn new_context(cfg gg.Cfg, scale int) *Context {
 	}
 	if !os.file_exists(font_path) {
 		println('failed to load RobotoMono-Regular.ttf')
-		exit(1)
+		return 0
 	}
 	# FT_Face face;
 	# if (FT_New_Face(ft, font_path.str, 0, &face))