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docs: Add example paint

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Hajime Hoshi 2015-01-09 02:39:20 +09:00
parent fb19f05b83
commit 638fbb9715
7 changed files with 195 additions and 0 deletions
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1
_docs/gen.go
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@ -132,6 +132,7 @@ var examples = []example{
{Name: "hue"},
{Name: "keyboard"},
{Name: "mosaic"},
{Name: "paint"},
{Name: "perspective"},
{Name: "rotate"},
{Name: "blocks"},

17
_docs/public/example/paint.content.html Normal file
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@ -0,0 +1,17 @@
<!DOCTYPE html>
<!--
Copyright 2015 Hajime Hoshi
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<script src="paint.js"></script>

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_docs/public/example/paint.html Normal file
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@ -0,0 +1,118 @@
<!DOCTYPE html>
<!--
Copyright 2015 Hajime Hoshi
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<style>
body {
font-family: sans-serif;
}
iframe {
border-color: #999;
border-style: solid;
border-width: 1px;
overflow: hidden;
}
pre {
background: #eee;
padding: 1em;
}
</style>
<nav><a href="..">Ebiten</a></nav>
<h1>paint</h1>
<iframe src="paint.content.html" width="640" height="480"></iframe>
<pre><code>package main
import (
&#34;fmt&#34;
&#34;github.com/hajimehoshi/ebiten&#34;
&#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
&#34;image&#34;
&#34;image/color&#34;
&#34;log&#34;
&#34;math&#34;
)
const (
screenWidth = 320
screenHeight = 240
)
var (
count int
brushImage *ebiten.Image
canvasImage *ebiten.Image
)
func update(screen *ebiten.Image) error {
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
count&#43;&#43;
}
mx, my := ebiten.CursorPosition()
if ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
op := &amp;ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(mx), float64(my))
op.ColorM.Scale(1.0, 0.25, 0.25, 1.0)
theta := 2.0 * math.Pi * float64(count%60) / 60.0
op.ColorM.Concat(ebiten.RotateHue(theta))
if err := canvasImage.DrawImage(brushImage, op); err != nil {
return err
}
}
if err := screen.DrawImage(canvasImage, nil); err != nil {
return err
}
if err := ebitenutil.DebugPrint(screen, fmt.Sprintf(&#34;(%d, %d)&#34;, mx, my)); err != nil {
return err
}
return nil
}
func main() {
var err error
const a0, a1, a2 = 0x40, 0xc0, 0xff
pixels := []uint8{
a0, a1, a1, a0,
a1, a2, a2, a1,
a1, a2, a2, a1,
a0, a1, a1, a0,
}
brushImage, err = ebiten.NewImageFromImage(&amp;image.Alpha{
Pix: pixels,
Stride: 4,
Rect: image.Rect(0, 0, 4, 4),
}, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
canvasImage, err = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
canvasImage.Fill(color.White)
if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Paint (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
}
</code></pre>
<footer>© 2015 Hajime Hoshi</footer>

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_docs/public/index.html
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@ -67,6 +67,8 @@ pre {
<a href="example/mosaic.html"><img src="images/example/mosaic.png" width="320" height="240" alt="Ebiten example: mosaic" class="example"></a>
<a href="example/paint.html"><img src="images/example/paint.png" width="320" height="240" alt="Ebiten example: paint" class="example"></a>
<a href="example/perspective.html"><img src="images/example/perspective.png" width="320" height="240" alt="Ebiten example: perspective" class="example"></a>
<a href="example/rotate.html"><img src="images/example/rotate.png" width="320" height="240" alt="Ebiten example: rotate" class="example"></a>