doc: Generate

_docs/index.tmpl.html

@@ -99,7 +99,7 @@ pre {
 </ul>
 
 <h2>Change Log</h2>
-<h3>2016-04-22</h3>
+<h3>2016-04-23</h3>
 <ul>
   <li>v1.3.0-rc1 released.
     <ul>

_docs/public/examples/alphablending.html

@@ -53,11 +53,30 @@ const (
 )
 
 var (
-    count           int
+    count       int
-    tmpRenderTarget *ebiten.Image
+    ebitenImage *ebiten.Image
-    ebitenImage     *ebiten.Image
 )
 
+type imageParts struct {
+    diff float64
+}
+
+func (p *imageParts) Src(i int) (int, int, int, int) {
+    w, h := ebitenImage.Size()
+    return 0, 0, w, h
+}
+
+func (p *imageParts) Dst(i int) (int, int, int, int) {
+    x := int(float64(i%10)*p.diff + 15)
+    y := int(float64(i/10)*p.diff + 20)
+    w, h := ebitenImage.Size()
+    return x, y, x + w, y + h
+}
+
+func (p *imageParts) Len() int {
+    return 10 * 10
+}
+
 func update(screen *ebiten.Image) error {
     count++
     count %= ebiten.FPS * 10
@@ -69,27 +88,15 @@ func update(screen *ebiten.Image) error {
         diff = float64(480-count) * 0.2
     }
 
-    if err := tmpRenderTarget.Clear(); err != nil {
+    screen.Fill(color.NRGBA{0x00, 0x00, 0x80, 0xff})
+    op := &ebiten.DrawImageOptions{}
+    op.ColorM.Scale(1.0, 1.0, 1.0, 0.5)
+    op.ImageParts = &imageParts{
+        diff: diff,
+    }
+    if err := screen.DrawImage(ebitenImage, op); err != nil {
         return err
     }
-    for i := 0; i < 10; i++ {
-        op := &ebiten.DrawImageOptions{}
-        op.GeoM.Translate(15+float64(i)*diff, 20)
-        op.ColorM.Scale(1.0, 1.0, 1.0, 0.5)
-        if err := tmpRenderTarget.DrawImage(ebitenImage, op); err != nil {
-            return err
-        }
-    }
-
-    screen.Fill(color.NRGBA{0x00, 0x00, 0x80, 0xff})
-    for i := 0; i < 10; i++ {
-        op := &ebiten.DrawImageOptions{}
-        op.GeoM.Translate(0, float64(i)*diff)
-        if err := screen.DrawImage(tmpRenderTarget, op); err != nil {
-            return err
-        }
-    }
-
     return nil
 }
 
@@ -99,10 +106,6 @@ func main() {
     if err != nil {
         log.Fatal(err)
     }
-    tmpRenderTarget, err = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
-    if err != nil {
-        log.Fatal(err)
-    }
     if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Alpha Blending (Ebiten Demo)"); err != nil {
         log.Fatal(err)
     }

_docs/public/index.html

@@ -111,7 +111,7 @@ pre {
 </ul>
 
 <h2>Change Log</h2>
-<h3>2016-04-22</h3>
+<h3>2016-04-23</h3>
 <ul>
   <li>v1.3.0-rc1 released.
     <ul>