本文整理汇总了Java中javafx.scene.image.Image.getPixelReader方法的典型用法代码示例。如果您正苦于以下问题:Java Image.getPixelReader方法的具体用法?Java Image.getPixelReader怎么用?Java Image.getPixelReader使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类javafx.scene.image.Image
的用法示例。
在下文中一共展示了Image.getPixelReader方法的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getResizedImage
import javafx.scene.image.Image; //导入方法依赖的package包/类
private Image getResizedImage(InputStream stream) {
boolean preserveRatio = true;
boolean smooth = true;
Image image = new Image(stream,
AppConstants.MAX_WINDOW_WIDTH,
AppConstants.MAX_WINDOW_HEIGHT,
preserveRatio,
smooth);
if (image.getPixelReader() == null) {
LOG.error("Something is wrong with the selected image.");
return null;
}
return image;
}
示例2: getMask
import javafx.scene.image.Image; //导入方法依赖的package包/类
@Override
public Set<Point2D> getMask(Image image, Color color) {
PixelReader pixelReader = image.getPixelReader();
Set<Point2D> mask = new HashSet<>();
int pixel;
boolean isTransparent, isBackgroundColor;
for(int i =0; i < image.getWidth(); i++){
for(int j = 0; j < image.getHeight(); j++){
pixel = pixelReader.getArgb(i, j);
//check the transparency of the pixel at (i,j)
isTransparent = (pixel >> 24) == 0x00;
Color backgroundColor = pixelReader.getColor(i, j);
isBackgroundColor = (color.equals(backgroundColor));
if(!isTransparent && !isBackgroundColor){
Point2D p = new Point2D(i,j);
mask.add(p);
}
}
}
return mask;
}
示例3: overlay
import javafx.scene.image.Image; //导入方法依赖的package包/类
/**
* Use an image as an overlay. Quality rendering is not considered here as
* this method purpose is for labels and technical marks. Chroma
* downsampling just drops samples with odd <em>x</em> and <em>y</em>
* coordinates. If image pixel has alpha value 0 then original canvas value
* under it is losslessly retained. Otherwise ordinary rounding is used when
* applying non fully transparent overlay data.
*/
public void overlay(Image image) {
PixelReader reader = image.getPixelReader();
for (int y = 0; y < Y.height; y++) {
boolean hasChromaY = (y & 1) == 0;
for (int x = 0; x < Y.width; x++) {
boolean hasChromaX = (x & 1) == 0;
// TODO PERF: make reading image data more efficient
int argb = reader.getArgb(x, y);
int alpha = argb >>> 24;
if (alpha == 0) {
continue; // transparent overlay -> skip math
}
double opacity = alpha / 255.0;
double transparency = 1.0 - opacity;
double overR = ((argb >> 16) & 0xff) / 255.0;
double overG = ((argb >> 8) & 0xff) / 255.0;
double overB = ((argb) & 0xff) / 255.0;
YCbCr params = matrix;
double overY = params.getY(overR, overG, overB);
double oldY = params.fromLumaCode(Y.get(x, y));
double newY = oldY * transparency + overY * opacity;
Y.set(x, y, round(params.toLumaCode(newY)));
if (hasChromaX && hasChromaY) {
// for overlay chroma just drop in-between samples (equals
// to nearest neighbor) there is no need of higher quality
int cx = x >> 1, cy = y >> 1;
double overCb = params.getCb(overY, overB);
double oldCb = params.fromChromaCode(Cb.get(cx, cy));
double newCb = oldCb * transparency + overCb * opacity;
Cb.set(cx, cy, round(params.toChromaCode(newCb)));
double overCr = params.getCr(overY, overR);
double oldCr = params.fromChromaCode(Cr.get(cx, cy));
double newCr = oldCr * transparency + overCr * opacity;
Cr.set(cx, cy, round(params.toChromaCode(newCr)));
}
}
}
}
示例4: crop
import javafx.scene.image.Image; //导入方法依赖的package包/类
public static Image crop(Image img,int x,int y,int w,int h){
PixelReader reader = img.getPixelReader();
WritableImage newImage = new WritableImage(reader, x, y, w, h);
return newImage;
}