Add texture from image.Image example

examples/textures/image_image/main.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"image/png"
+	"os"
+
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	raylib.InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture from image.Image")
+
+	r, err := os.Open("raylib_logo.png")
+	if err != nil {
+		raylib.TraceLog(raylib.LogError, err.Error())
+	}
+	defer r.Close()
+
+	img, err := png.Decode(r)
+	if err != nil {
+		raylib.TraceLog(raylib.LogError, err.Error())
+	}
+
+	// Get image size
+	size := img.Bounds().Size()
+
+	// Dynamic memory allocation to store pixels data (Color type)
+	pixels := make([]raylib.Color, size.X*size.Y)
+
+	for y := 0; y < size.Y; y++ {
+		for x := 0; x < size.X; x++ {
+			color := img.At(x, y)
+			r, g, b, a := color.RGBA()
+			pixels[x+y*size.Y] = raylib.NewColor(uint8(r), uint8(g), uint8(b), uint8(a))
+		}
+	}
+
+	// Load pixels data into an image structure and create texture
+	imEx := raylib.LoadImageEx(pixels, int32(size.X), int32(size.Y))
+	texture := raylib.LoadTextureFromImage(imEx)
+
+	// Unload CPU (RAM) image data
+	raylib.UnloadImage(imEx)
+
+	// Unload CPU (RAM) pixels data
+	pixels = nil
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		raylib.BeginDrawing()
+
+		raylib.ClearBackground(raylib.RayWhite)
+		raylib.DrawTexture(texture, screenWidth/2-texture.Width/2, screenHeight/2-texture.Height/2, raylib.White)
+		raylib.DrawText("this IS a texture loaded from an image.Image!", 285, 370, 10, raylib.Gray)
+
+		raylib.EndDrawing()
+	}
+
+	raylib.UnloadTexture(texture)
+
+	raylib.CloseWindow()
+}