dc := gg.NewContext(512, 512)  // dc = drawing context

package main
import (
    "github.com/gogpu/gg"
    "github.com/gogpu/gg/text"
)
func main() {
    // Create a 512x512 drawing context
    dc := gg.NewContext(512, 512)
    defer dc.Close() // Clean resource release
    dc.ClearWithColor(gg.White)
    // Draw a gradient circle
    dc.SetHexColor("#3498db")
    dc.DrawCircle(256, 256, 100)
    dc.Fill()
    // Text rendering with font fallback
    source, _ := text.NewFontSourceFromFile("arial.ttf")
    defer source.Close()
    dc.SetFont(source.Face(32))
    dc.SetColor(gg.Black)
    dc.DrawString("Hello, GoGPU!", 180, 260)
    dc.SavePNG("output.png")
}

dc := gg.NewContext(800, 600)
defer dc.Close()
// Shapes with transforms
dc.Push()
dc.Translate(400, 300)
dc.Rotate(math.Pi / 4)
dc.DrawRectangle(-50, -50, 100, 100)
dc.SetRGB(0.2, 0.5, 0.8)
dc.Fill()
dc.Pop()
// Bezier paths
dc.MoveTo(100, 100)
dc.QuadraticTo(200, 50, 300, 100)
dc.CubicTo(350, 150, 350, 250, 300, 300)
dc.SetLineWidth(3)
dc.Stroke()

path := gg.BuildPath().
    MoveTo(100, 100).
    LineTo(200, 100).
    QuadTo(250, 150, 200, 200).
    CubicTo(150, 250, 100, 250, 50, 200).
    Close().
    Circle(300, 150, 50).
    Star(400, 150, 40, 20, 5).
    Build()
dc.SetPath(path)
dc.Fill()

scene := gg.NewScene()
// Build scene with layers
scene.PushLayer(gg.BlendMultiply, 0.8)
scene.Fill(style, transform, gg.Solid(gg.Red), gg.Circle(150, 200, 100))
scene.Fill(style, transform, gg.Solid(gg.Blue), gg.Circle(250, 200, 100))
scene.PopLayer()
// Render to pixmap
renderer := scene.NewRenderer()
renderer.Render(target, scene)

// Font composition with fallback
mainFont, _ := text.NewFontSourceFromFile("Roboto.ttf")
emojiFont, _ := text.NewFontSourceFromFile("NotoEmoji.ttf")
defer mainFont.Close()
defer emojiFont.Close()
multiFace, _ := text.NewMultiFace(
    mainFont.Face(24),
    text.NewFilteredFace(emojiFont.Face(24), text.RangeEmoji),
)
dc.SetFont(multiFace)
dc.DrawString("Hello World! Nice day!", 50, 100)
// Layout with wrapping
opts := text.LayoutOptions{
    MaxWidth: 400,
    WrapMode: text.WrapWordChar,
    Alignment: text.AlignCenter,
}
layout := text.LayoutText("Long text...", face, 16, opts)

// Create mask from current drawing
dc.DrawCircle(200, 200, 100)
dc.Fill()
mask := dc.AsMask()
// Apply mask to new context
dc2 := gg.NewContext(400, 400)
dc2.SetMask(mask)
dc2.DrawRectangle(0, 0, 400, 400)
dc2.Fill() // Only visible through mask
// Mask operations
dc2.InvertMask()
dc2.ClearMask()

dc.PushLayer(gg.BlendOverlay, 0.7)
dc.SetRGB(1, 0, 0)
dc.DrawCircle(150, 200, 100)
dc.Fill()
dc.SetRGB(0, 0, 1)
dc.DrawCircle(250, 200, 100)
dc.Fill()
dc.PopLayer() // Composite with overlay blend