Initial commit

examples/textures/image_drawing/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	raylib.InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture loading and drawing")
+
+	// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
+	cat := raylib.LoadImage("cat.png")                            // Load image in CPU memory (RAM)
+	raylib.ImageCrop(cat, raylib.NewRectangle(100, 10, 280, 380)) // Crop an image piece
+	raylib.ImageFlipHorizontal(cat)                               // Flip cropped image horizontally
+	raylib.ImageResize(cat, 150, 200)                             // Resize flipped-cropped image
+
+	parrots := raylib.LoadImage("parrots.png") // Load image in CPU memory (RAM)
+
+	// Draw one image over the other with a scaling of 1.5f
+	raylib.ImageDraw(parrots, cat, raylib.NewRectangle(0, 0, cat.Width, cat.Height), raylib.NewRectangle(30, 40, int32(float32(cat.Width)*1.5), int32(float32(cat.Height)*1.5)))
+	raylib.ImageCrop(parrots, raylib.NewRectangle(0, 50, parrots.Width, parrots.Height-100)) // Crop resulting image
+
+	raylib.UnloadImage(cat) // Unload image from RAM
+
+	texture := raylib.LoadTextureFromImage(parrots) // Image converted to texture, uploaded to GPU memory (VRAM)
+	raylib.UnloadImage(parrots)                     // Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		raylib.BeginDrawing()
+
+		raylib.ClearBackground(raylib.RayWhite)
+
+		raylib.DrawTexture(texture, screenWidth/2-texture.Width/2, screenHeight/2-texture.Height/2-40, raylib.White)
+		raylib.DrawRectangleLines(screenWidth/2-texture.Width/2, screenHeight/2-texture.Height/2-40, texture.Width, texture.Height, raylib.DarkGray)
+
+		raylib.DrawText("We are drawing only one texture from various images composed!", 240, 350, 10, raylib.DarkGray)
+		raylib.DrawText("Source images have been cropped, scaled, flipped and copied one over the other.", 190, 370, 10, raylib.DarkGray)
+
+		raylib.EndDrawing()
+	}
+
+	raylib.UnloadTexture(texture)
+
+	raylib.CloseWindow()
+}