Emit NativeImage objects in paint event

This commit is contained in:
Cheng Zhao 2016-08-04 13:47:52 +09:00
parent 3be68ba136
commit 8c4ebdc88e
3 changed files with 24 additions and 42 deletions

View file

@ -1337,15 +1337,10 @@ bool WebContents::IsOffScreen() const {
return type_ == OFF_SCREEN;
}
void WebContents::OnPaint(const gfx::Rect& dirty_rect,
const SkBitmap& bitmap) {
v8::MaybeLocal<v8::Object> buffer = node::Buffer::Copy(
isolate(),
reinterpret_cast<char*>(bitmap.getPixels()), bitmap.getSize());
if (!buffer.IsEmpty()) {
Emit("paint", dirty_rect, buffer.ToLocalChecked(),
gfx::Size(bitmap.width(), bitmap.height()));
}
void WebContents::OnPaint(const gfx::Rect& dirty_rect, const SkBitmap& bitmap) {
mate::Handle<NativeImage> image =
NativeImage::Create(isolate(), gfx::Image::CreateFrom1xBitmap(bitmap));
Emit("paint", dirty_rect, image);
}
void WebContents::StartPainting() {

View file

@ -463,33 +463,21 @@ Returns:
* `event` Event
* `dirtyRect` Object
* `x` Number - the x coordinate on the bitmap
* `y` Number - the y coordinate on the bitmap
* `width` Number - the width of the dirty area
* `height` Number - the height of the dirty area
* `data` Buffer - the bitmap data of the dirty rect
* `bitmapSize` Object
* `width` Number - the width of the whole bitmap
* `height` Number - the height of the whole bitmap
* `x` Integer - The x coordinate on the image.
* `y` Integer - The y coordinate on the image.
* `width` Integer - The width of the dirty area.
* `height` Integer - The height of the dirty area.
* `image` [NativeImage](native-image.md) - The image data of the dirty rect
Emitted when a new frame is generated. Only the dirty area is passed in the
buffer.
```javascript
const {BrowserWindow} = require('electron')
let win = new BrowserWindow({
width: 800,
height: 1500,
webPreferences: {
offscreen: true
}
let win = new BrowserWindow({webPreferences: {offscreen: true}})
win.webContents.on('paint', (event, dirty, image) => {
fs.writeSync('frame.png', image.toPNG())
})
win.loadURL('http://github.com')
win.webContents.on('paint', (event, dirty, data) => {
// updateBitmap(dirty, data)
})
```
### Instance Methods

View file

@ -37,19 +37,18 @@ const {app, BrowserWindow} = require('electron')
app.disableHardwareAcceleration()
let win = new BrowserWindow({
width: 800,
height: 1500,
webPreferences: {
offscreen: true
}
})
win.loadURL('http://github.com')
win.webContents.setFrameRate(30)
win.webContents.on('paint', (event, dirty, data) => {
// updateBitmap(dirty, data)
let win
app.once('ready', () => {
win = new BrowserWindow({
webPreferences: {
offscreen: true
}
})
win.loadURL('http://github.com')
win.webContents.on('paint', (event, dirty, image) => {
fs.writeSync('frame.png', image.toPNG())
})
win.webContents.setFrameRate(30)
})
```