Example usage for com.google.gwt.canvas.dom.client CanvasPixelArray get

List of usage examples for com.google.gwt.canvas.dom.client CanvasPixelArray get

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Introduction

In this page you can find the example usage for com.google.gwt.canvas.dom.client CanvasPixelArray get.

Prototype

public final native int get(int i) ;

Source Link

Document

Returns the data value at index i.

Usage

From source file:anagram.client.Lens.java

License:Apache License

public void draw(Context2d back, Context2d front) {
    front.drawImage(back.getCanvas(), 0, 0);

    if (!GWT.isScript()) {
        // in devmode this effect is slow so we disable it here
    } else {//from  ww w. j  av  a 2 s.  c  o  m
        ImageData frontData = front.getImageData((int) (pos.x - radius), (int) (pos.y - radius), 2 * radius,
                2 * radius);
        CanvasPixelArray frontPixels = frontData.getData();
        ImageData backData = back.getImageData((int) (pos.x - radius), (int) (pos.y - radius), 2 * radius,
                2 * radius);
        CanvasPixelArray backPixels = backData.getData();
        int srcIdx, dstIdx;
        for (int i = lensArray.length - 1; i >= 0; i--) {
            dstIdx = 4 * lensArray[i][0];
            srcIdx = 4 * lensArray[i][1];
            frontPixels.set(dstIdx + 0, backPixels.get(srcIdx + 0));
            frontPixels.set(dstIdx + 1, backPixels.get(srcIdx + 1));
            frontPixels.set(dstIdx + 2, backPixels.get(srcIdx + 2));
        }
        front.putImageData(frontData, (int) (pos.x - radius), (int) (pos.y - radius));
    }

    front.setStrokeStyle(strokeStyle);
    front.beginPath();
    front.arc(pos.x, pos.y, radius, 0, Math.PI * 2, true);
    front.closePath();
    front.stroke();
}

From source file:com.emitrom.lienzo.client.core.image.AbstractConvolveImageFilter.java

License:Open Source License

@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }/*  ww w.java2 s. co  m*/
    ImageData output = source.copy();

    final CanvasPixelArray srcd = source.getData();

    if (null == srcd) {
        return source;
    }
    final CanvasPixelArray dstd = output.getData();

    if (null == dstd) {
        return source;
    }
    int side = (int) (Math.sqrt(m_weights.length) + 0.5);

    int half = (int) (Math.floor(side / 2));

    int sw = source.getWidth();

    int sh = source.getHeight();

    int w = sw;

    int h = sh;

    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            int sy = y;

            int sx = x;

            int dsto = (y * w + x) * 4;

            int r = 0, g = 0, b = 0;

            for (int cy = 0; cy < side; cy++) {
                for (int cx = 0; cx < side; cx++) {
                    int scy = sy + cy - half;

                    int scx = sx + cx - half;

                    if (scy >= 0 && scy < sh && scx >= 0 && scx < sw) {
                        int srco = (scy * sw + scx) * 4;

                        double wt = m_weights[cy * side + cx];

                        r += srcd.get(srco + R_OFFSET) * wt;

                        g += srcd.get(srco + G_OFFSET) * wt;

                        b += srcd.get(srco + B_OFFSET) * wt;
                    }
                }
            }
            dstd.set(dsto + R_OFFSET, r);

            dstd.set(dsto + G_OFFSET, g);

            dstd.set(dsto + B_OFFSET, b);
        }
    }
    return output;
}

From source file:com.emitrom.lienzo.client.core.image.AverageGrayScaleImageDataFilter.java

License:Open Source License

@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }//from  w w w .j a  v a  2  s  .  c  om
    final int length = getLength(source);

    if (copy) {
        source = source.copy();
    }
    final CanvasPixelArray data = source.getData();

    if (null == data) {
        return source;
    }
    if (isNative()) {
        filter0(data, length);
    } else {
        for (int i = 0; i < length; i += PIXEL_SZ) {
            int v = (int) ((((double) (data.get(i + R_OFFSET) + data.get(i + G_OFFSET)
                    + data.get(i + B_OFFSET))) / 3.0) + 0.5);

            data.set(i + R_OFFSET, v);

            data.set(i + G_OFFSET, v);

            data.set(i + B_OFFSET, v);
        }
    }
    return source;
}

From source file:com.emitrom.lienzo.client.core.image.BrightnessImageDataFilter.java

License:Open Source License

@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }/*ww  w  .j  av a2  s . c om*/
    final int length = getLength(source);

    if (copy) {
        source = source.copy();
    }
    final CanvasPixelArray data = source.getData();

    if (null == data) {
        return source;
    }
    if (isNative()) {

    } else {
        for (int i = 0; i < length; i += PIXEL_SZ) {
            int r = (int) Math.max(Math.min((data.get(i + R_OFFSET) + (m_brightness * 255) + 0.5), 255), 0);

            int g = (int) Math.max(Math.min((data.get(i + G_OFFSET) + (m_brightness * 255) + 0.5), 255), 0);

            int b = (int) Math.max(Math.min((data.get(i + B_OFFSET) + (m_brightness * 255) + 0.5), 255), 0);

            data.set(i + R_OFFSET, r);

            data.set(i + G_OFFSET, g);

            data.set(i + B_OFFSET, b);
        }
    }
    return source;
}

From source file:com.emitrom.lienzo.client.core.image.ChannelBrightnessImageDataFilter.java

License:Open Source License

@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }//from   www  . j  a va2 s. co m
    final int length = getLength(source);

    if (copy) {
        source = source.copy();
    }
    final CanvasPixelArray data = source.getData();

    if (null == data) {
        return source;
    }
    if (isNative()) {
        filter0(data, length, m_r_brightness, m_g_brightness, m_b_brightness);
    } else {
        for (int i = 0; i < length; i += PIXEL_SZ) {
            int r = (int) Math.max(Math.min((data.get(i + R_OFFSET) + (m_r_brightness * 255) + 0.5), 255), 0);

            int g = (int) Math.max(Math.min((data.get(i + G_OFFSET) + (m_g_brightness * 255) + 0.5), 255), 0);

            int b = (int) Math.max(Math.min((data.get(i + B_OFFSET) + (m_b_brightness * 255) + 0.5), 255), 0);

            data.set(i + R_OFFSET, r);

            data.set(i + G_OFFSET, g);

            data.set(i + B_OFFSET, b);
        }
    }
    return source;
}

From source file:com.emitrom.lienzo.client.core.image.ColorLuminosityImageDataFilter.java

License:Open Source License

@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }//from  w  w w. j  ava 2 s  .  com
    final int length = getLength(source);

    if (copy) {
        source = source.copy();
    }
    final CanvasPixelArray data = source.getData();

    if (null == data) {
        return source;
    }
    if (isNative()) {
        filter0(data, length, getR(), getG(), getB());
    } else {
        for (int i = 0; i < length; i += PIXEL_SZ) {
            double m = (((0.21 * data.get(i + R_OFFSET)) + (0.72 * data.get(i + G_OFFSET))
                    + (0.07 * data.get(i + B_OFFSET))) / 255.0);

            data.set(i + R_OFFSET, (int) ((getR() * m) + 0.5));

            data.set(i + G_OFFSET, (int) ((getG() * m) + 0.5));

            data.set(i + B_OFFSET, (int) ((getB() * m) + 0.5));
        }
    }
    return source;
}

From source file:com.emitrom.lienzo.client.core.image.LightnessGrayScaleImageDataFilter.java

License:Open Source License

@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }//from   w ww  .  java  2 s  .c o m
    final int length = getLength(source);

    if (copy) {
        source = source.copy();
    }
    final CanvasPixelArray data = source.getData();

    if (null == data) {
        return source;
    }
    if (isNative()) {
        filter0(data, length);
    } else {
        for (int i = 0; i < length; i += PIXEL_SZ) {
            int r = data.get(i + R_OFFSET);

            int g = data.get(i + G_OFFSET);

            int b = data.get(i + B_OFFSET);

            int v = (int) ((((Math.max(Math.max(r, g), b) + Math.min(Math.min(r, g), b))) / 2.0) + 0.5);

            data.set(i + R_OFFSET, v);

            data.set(i + G_OFFSET, v);

            data.set(i + B_OFFSET, v);
        }
    }
    return source;
}

From source file:com.emitrom.lienzo.client.core.image.LuminosityGrayScaleImageDataFilter.java

License:Open Source License

@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }//from   ww  w.  j a v  a  2  s  .  c o m
    final int length = getLength(source);

    if (copy) {
        source = source.copy();
    }
    final CanvasPixelArray data = source.getData();

    if (null == data) {
        return source;
    }
    if (isNative()) {
        filter0(data, length);
    } else {
        for (int i = 0; i < length; i += PIXEL_SZ) {
            int v = (int) (((0.21 * data.get(i + R_OFFSET)) + (0.72 * data.get(i + G_OFFSET))
                    + (0.07 * data.get(i + B_OFFSET))) + 0.5);

            data.set(i + R_OFFSET, v);

            data.set(i + G_OFFSET, v);

            data.set(i + B_OFFSET, v);
        }
    }
    return source;
}

From source file:com.emitrom.lienzo.client.core.image.RGBIgnoreAlphaImageDataFilter.java

License:Open Source License

/**
 * Returns an {@link ImageData} that is transformed based on the passed in RGB color, setting alpha to 255
 */// w  w  w.ja  va2 s. c  o  m
@Override
public ImageData filter(ImageData source, boolean copy) {
    if (null == source) {
        return null;
    }
    final int length = getLength(source);

    if (copy) {
        source = source.copy();
    }
    final CanvasPixelArray data = source.getData();

    if (null == data) {
        return source;
    }
    if (isNative()) {
        filter0(data, length, getR(), getG(), getB());
    } else {
        for (int i = 0; i < length; i += PIXEL_SZ) {
            if (data.get(i + A_OFFSET) > 0) {
                data.set(i + R_OFFSET, getR());

                data.set(i + G_OFFSET, getG());

                data.set(i + B_OFFSET, getB());

                data.set(i + A_OFFSET, 255);
            }
        }
    }
    return source;
}

From source file:com.googlecode.mgwt.image.client.ImageConverter.java

License:Apache License

public void convert(final ImageResource resource, String color,
        final ImageConverterCallback imageConverterCallback) {

    if (color == null) {
        throw new IllegalArgumentException();
    }/*from   w w  w. j ava2 s .c  o  m*/

    if (!color.startsWith("#")) {
        throw new IllegalArgumentException();
    }

    color = maybeExpandColor(color);

    final int hexColor = Integer.parseInt(color.substring(1), 16);

    final int red = hexColor >> 16 & 0xFF;
    final int green = hexColor >> 8 & 0xFF;
    final int blue = hexColor & 0xFF;

    final int height = resource.getHeight();
    final int width = resource.getWidth();

    loadImage(resource.getSafeUri().asString(), width, height, new LoadImageCallback() {

        @Override
        public void onSuccess(ImageElement imageElement) {

            Canvas canvas = Canvas.createIfSupported();
            canvas.getElement().setPropertyInt("height", height);
            canvas.getElement().setPropertyInt("width", width);

            Context2d context = canvas.getContext2d();
            context.drawImage(imageElement, 0, 0);
            ImageData imageData = context.getImageData(0, 0, width, height);

            CanvasPixelArray canvasPixelArray = imageData.getData();

            for (int i = 0; i < canvasPixelArray.getLength(); i += 4) {
                canvasPixelArray.set(i, red);
                canvasPixelArray.set(i + 1, green);
                canvasPixelArray.set(i + 2, blue);
                canvasPixelArray.set(i + 3, canvasPixelArray.get(i + 3));
            }
            context.putImageData(imageData, 0, 0);
            imageConverterCallback.onSuccess(new ConvertedImageResource(canvas.toDataUrl("image/png"),
                    resource.getWidth(), resource.getHeight()));
        }
    });
}