From ee30ffe333811dc3c71a552a4bf63a78491f7148 Mon Sep 17 00:00:00 2001
From: Milan Nikolic <gen2brain@gmail.com>
Date: Thu, 26 Oct 2017 21:37:32 +0200
Subject: [PATCH] Add image_generation example

---
 examples/textures/image_generation/main.go | 94 ++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 examples/textures/image_generation/main.go

diff --git a/examples/textures/image_generation/main.go b/examples/textures/image_generation/main.go
new file mode 100644
index 0000000..55b499c
--- /dev/null
+++ b/examples/textures/image_generation/main.go
@@ -0,0 +1,94 @@
+package main
+
+import (
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+const numTextures = 7
+
+func main() {
+	screenWidth := 800
+	screenHeight := 450
+
+	raylib.InitWindow(int32(screenWidth), int32(screenHeight), "raylib [textures] example - procedural images generation")
+
+	verticalGradient := raylib.GenImageGradientV(screenWidth, screenHeight, raylib.Red, raylib.Blue)
+	horizontalGradient := raylib.GenImageGradientH(screenWidth, screenHeight, raylib.Red, raylib.Blue)
+	radialGradient := raylib.GenImageGradientRadial(screenWidth, screenHeight, 0, raylib.White, raylib.Black)
+	checked := raylib.GenImageChecked(screenWidth, screenHeight, 32, 32, raylib.Red, raylib.Blue)
+	whiteNoise := raylib.GenImageWhiteNoise(screenWidth, screenHeight, 0.5)
+	perlinNoise := raylib.GenImagePerlinNoise(screenWidth, screenHeight, 8)
+	cellular := raylib.GenImageCellular(screenWidth, screenHeight, 32)
+
+	textures := make([]raylib.Texture2D, numTextures)
+	textures[0] = raylib.LoadTextureFromImage(verticalGradient)
+	textures[1] = raylib.LoadTextureFromImage(horizontalGradient)
+	textures[2] = raylib.LoadTextureFromImage(radialGradient)
+	textures[3] = raylib.LoadTextureFromImage(checked)
+	textures[4] = raylib.LoadTextureFromImage(whiteNoise)
+	textures[5] = raylib.LoadTextureFromImage(perlinNoise)
+	textures[6] = raylib.LoadTextureFromImage(cellular)
+
+	// Unload image data (CPU RAM)
+	raylib.UnloadImage(verticalGradient)
+	raylib.UnloadImage(horizontalGradient)
+	raylib.UnloadImage(radialGradient)
+	raylib.UnloadImage(checked)
+	raylib.UnloadImage(whiteNoise)
+	raylib.UnloadImage(perlinNoise)
+	raylib.UnloadImage(cellular)
+
+	currentTexture := 0
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		if raylib.IsMouseButtonPressed(raylib.MouseLeftButton) {
+			currentTexture = (currentTexture + 1) % numTextures // Cycle between the textures
+		}
+
+		raylib.BeginDrawing()
+
+		raylib.ClearBackground(raylib.RayWhite)
+
+		raylib.DrawTexture(textures[currentTexture], 0, 0, raylib.White)
+
+		raylib.DrawRectangle(30, 400, 325, 30, raylib.Fade(raylib.SkyBlue, 0.5))
+		raylib.DrawRectangleLines(30, 400, 325, 30, raylib.Fade(raylib.White, 0.5))
+		raylib.DrawText("MOUSE LEFT BUTTON to CYCLE PROCEDURAL TEXTURES", 40, 410, 10, raylib.White)
+
+		switch currentTexture {
+		case 0:
+			raylib.DrawText("VERTICAL GRADIENT", 560, 10, 20, raylib.RayWhite)
+			break
+		case 1:
+			raylib.DrawText("HORIZONTAL GRADIENT", 540, 10, 20, raylib.RayWhite)
+			break
+		case 2:
+			raylib.DrawText("RADIAL GRADIENT", 580, 10, 20, raylib.LightGray)
+			break
+		case 3:
+			raylib.DrawText("CHECKED", 680, 10, 20, raylib.RayWhite)
+			break
+		case 4:
+			raylib.DrawText("WHITE NOISE", 640, 10, 20, raylib.Red)
+			break
+		case 5:
+			raylib.DrawText("PERLIN NOISE", 630, 10, 20, raylib.RayWhite)
+			break
+		case 6:
+			raylib.DrawText("CELLULAR", 670, 10, 20, raylib.RayWhite)
+			break
+		default:
+			break
+		}
+
+		raylib.EndDrawing()
+	}
+
+	for _, t := range textures {
+		raylib.UnloadTexture(t)
+	}
+
+	raylib.CloseWindow()
+}