Merge pull request #445 from Hultan/font_loading

New example: font_loading

examples/text/font_loading/main.go

@@ -0,0 +1,79 @@
+/*******************************************************************************************
+*
+*   raylib [text] example - Font loading
+*
+*   NOTE: raylib can load fonts from multiple input file formats:
+*
+*     - TTF/OTF > Sprite font atlas is generated on loading, user can configure
+*                 some of the generation parameters (size, characters to include)
+*     - BMFonts > Angel code font fileformat, sprite font image must be provided
+*                 together with the .fnt file, font generation cna not be configured
+*     - XNA Spritefont > Sprite font image, following XNA Spritefont conventions,
+*                 Characters in image must follow some spacing and order rules
+*
+*   Example originally created with raylib 1.4, last time updated with raylib 3.0
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2016-2024 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+package main
+
+import rl "github.com/gen2brain/raylib-go/raylib"
+
+const (
+	screenWidth  = 800
+	screenHeight = 450
+)
+
+func main() {
+	rl.InitWindow(screenWidth, screenHeight, "raylib [text] example - font loading")
+
+	// Define characters to draw
+	// NOTE: raylib supports UTF-8 encoding, following list is actually codified as UTF8 internally
+	msg := "!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHI\nJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmn\nopqrstuvwxyz" +
+		"{|}~¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓ\nÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷\nøùúûüýþÿ"
+
+	// NOTE: Textures/Fonts MUST be loaded after Window initialization (OpenGL context is required)
+
+	// BMFont (AngelCode) : Font data and image atlas have been generated using external program
+	fontBm := rl.LoadFont("pixantiqua.fnt")
+
+	// TTF font : Font data and atlas are generated directly from TTF
+	// NOTE: We define a font base size of 32 pixels tall and up-to 250 characters
+	fontTtf := rl.LoadFontEx("pixantiqua.ttf", 32, nil, 250)
+
+	rl.SetTextLineSpacing(16) // Set line spacing for multiline text (when line breaks are included '\n')
+
+	useTtf := false
+
+	rl.SetTargetFPS(60) // Set our game to run at 60 frames-per-second
+
+	for !rl.WindowShouldClose() { // Detect window close button or ESC key
+		// Update
+		useTtf = rl.IsKeyDown(rl.KeySpace)
+
+		// Draw
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.DrawText("Hold SPACE to use TTF generated font", 20, 20, 20, rl.LightGray)
+
+		if !useTtf {
+			rl.DrawTextEx(fontBm, msg, rl.Vector2{X: 20.0, Y: 100.0}, float32(fontBm.BaseSize), 2, rl.Maroon)
+			rl.DrawText("Using BMFont (Angelcode) imported", 20, int32(rl.GetScreenHeight())-30, 20, rl.Gray)
+		} else {
+			rl.DrawTextEx(fontTtf, msg, rl.Vector2{X: 20.0, Y: 100.0}, float32(fontTtf.BaseSize), 2, rl.Lime)
+			rl.DrawText("Using TTF font generated", 20, int32(rl.GetScreenHeight())-30, 20, rl.Gray)
+		}
+
+		rl.EndDrawing()
+	}
+
+	// De-Initialization
+	rl.UnloadFont(fontBm)  // AngelCode Font unloading
+	rl.UnloadFont(fontTtf) // TTF Font unloading
+	rl.CloseWindow()       // Close window and OpenGL context
+}