Example usage for com.google.gwt.dom.client CanvasElement getContext2d

Introduction

In this page you can find the example usage for com.google.gwt.dom.client CanvasElement getContext2d.

Prototype

public final native Context2d getContext2d() ;

Source Link

Document

Returns a 2D rendering context.

Usage

From source file:com.yocalist.client.ui.GwtCanvasView.java

License:Apache License

public GwtCanvasView(CanvasElement element, String data, HasText progress) {
    context = element.getContext2d();
    this.data = data;
    this.progress = progress;
}

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From source file:forplay.html.HtmlCanvas.java

License:Apache License

HtmlCanvas(CanvasElement canvas, int width, int height) {
    this.canvas = canvas;
    this.width = width;
    this.height = height;
    canvas.setWidth(width);//from   w w w.jav  a2s .  c  o  m
    canvas.setHeight(height);
    ctx = canvas.getContext2d();
}

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From source file:gwt.material.design.addins.client.camera.MaterialCameraCapture.java

License:Apache License

/**
 * Native call to capture the frame of the video stream.
 *///from  w ww  . jav  a2s.c o m
protected String nativeCaptureToDataURL(CanvasElement canvas, Element element, String mimeType) {
    VideoElement videoElement = (VideoElement) element;
    int width = videoElement.getVideoWidth();
    int height = videoElement.getVideoHeight();
    if (Double.isNaN(width) || Double.isNaN(height)) {
        width = videoElement.getClientWidth();
        height = videoElement.getClientHeight();
    }
    canvas.setWidth(width);
    canvas.setHeight(height);
    Context2d context = canvas.getContext2d();
    context.drawImage(videoElement, 0, 0, width, height);
    return canvas.toDataUrl(mimeType);
}

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From source file:gwt.material.design.addins.client.signature.MaterialSignaturePad.java

License:Apache License

protected void applyResize() {
    CanvasElement element = getElement().cast();
    double ratio = getRatio();
    element.setWidth((int) (getOffsetWidth() * ratio));
    element.setHeight((int) (getOffsetHeight() * ratio));
    element.getContext2d().scale(ratio, ratio);
    getSignaturePad().clear();//w w  w .  ja v a2  s  .  c  o m
}

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From source file:org.cruxframework.crux.core.client.image.ImageProcessor.java

License:Apache License

/**
 * Resize the internal image/* w w  w. jav a2s  . c om*/
 * @param width
 * @param height
 */
public void resize(int width, int height) {
    assert (image != null || this.canvas != null) : "You must load an image first";

    CanvasElement canvas = Document.get().createCanvasElement().cast();
    canvas.setWidth(width);
    canvas.setHeight(height);
    if (image != null) {
        canvas.getContext2d().drawImage(image.asImageElement(), 0, 0, width, height);
    } else {
        canvas.getContext2d().drawImage(this.canvas, 0, 0, this.canvas.getWidth(), this.canvas.getHeight(), 0,
                0, width, height);
    }

    this.canvas = canvas;
    image = null;
}

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From source file:org.parallax3d.parallax.graphics.textures.PixmapTextureData.java

License:Open Source License

/**
 * Warning: Scaling through the canvas will only work with images that use
 * premultiplied alpha./*from www. j av  a 2 s.c o  m*/
 *
 * @param maxSize  the max size of absoluteWidth or absoluteHeight
 *
 * @return a new Image, or the same one if no clamping was necessary
 */
public PixmapTextureData clampToMaxSize(int maxSize) {
    int imgWidth = image.getOffsetWidth();
    int imgHeight = image.getOffsetHeight();

    if (imgWidth <= maxSize && imgHeight <= maxSize)
        return this;

    int maxDimension = Math.max(imgWidth, imgHeight);
    int newWidth = (int) Math.floor(imgWidth * maxSize / maxDimension);
    int newHeight = (int) Math.floor(imgHeight * maxSize / maxDimension);

    CanvasElement canvas = Document.get().createElement("canvas").cast();
    canvas.setWidth(newWidth);
    canvas.setHeight(newHeight);

    Context2d context = canvas.getContext2d();
    context.drawImage((ImageElement) image, 0, 0, imgWidth, imgHeight, 0, 0, newWidth, newHeight);

    image.getParentElement().appendChild(canvas);
    image.removeFromParent();
    image = canvas;

    return this;
}

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From source file:org.parallax3d.parallax.graphics.textures.PixmapTextureData.java

License:Open Source License

@Override
public PixmapTextureData toPowerOfTwo() {
    if (isPowerOfTwo())
        return this;

    int width = image.getOffsetWidth();
    int height = image.getOffsetHeight();

    CanvasElement canvas = Document.get().createElement("canvas").cast();

    // Scale up the texture to the next highest power of two dimensions.
    canvas.setWidth(Mathematics.getNextHighestPowerOfTwo(width));
    canvas.setHeight(Mathematics.getNextHighestPowerOfTwo(height));

    Context2d context = canvas.getContext2d();
    context.drawImage((ImageElement) image, 0, 0, width, height);

    image = canvas;//from  ww  w.j a v a2s. c  om
    return this;
}

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From source file:playn.html.HtmlCanvas.java

License:Apache License

HtmlCanvas(CanvasElement canvas, float width, float height) {
    this(canvas, canvas.getContext2d(), width, height);
    canvas.setWidth(MathUtil.iceil(width));
    canvas.setHeight(MathUtil.iceil(height));
}

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From source file:playn.html.HtmlImage.java

License:Apache License

ImageElement subImageElement(float x, float y, float width, float height) {
    CanvasElement canvas = Document.get().createElement("canvas").<CanvasElement>cast();
    canvas.setWidth(MathUtil.iceil(width));
    canvas.setHeight(MathUtil.iceil(height));
    canvas.getContext2d().drawImage(img, x, y, width, height, 0, 0, width, height);
    return canvas.cast();
}

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From source file:thothbot.parallax.core.client.renderers.WebGLRenderer.java

License:Open Source License

private CanvasElement createPowerOfTwoImage(Element image) {
    int width = image.getOffsetWidth();
    int height = image.getOffsetHeight();

    CanvasElement canvas = Document.get().createElement("canvas").cast();

    // Scale up the texture to the next highest power of two dimensions.
    canvas.setWidth(Mathematics.getNextHighestPowerOfTwo(width));
    canvas.setHeight(Mathematics.getNextHighestPowerOfTwo(height));

    Context2d context = canvas.getContext2d();
    context.drawImage((ImageElement) image, 0, 0, width, height);

    return canvas;
}

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