本文整理匯總了Java中java.awt.image.ColorModel.OPAQUE屬性的典型用法代碼示例。如果您正苦於以下問題：Java ColorModel.OPAQUE屬性的具體用法？Java ColorModel.OPAQUE怎麽用？Java ColorModel.OPAQUE使用的例子？那麽, 這裏精選的屬性代碼示例或許可以為您提供幫助。您也可以進一步了解該屬性所在類java.awt.image.ColorModel的用法示例。
在下文中一共展示了ColorModel.OPAQUE屬性的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: getThumbnail
BufferedImage getThumbnail(ImageInputStream iis,
JPEGImageReader reader)
throws IOException {
iis.mark();
iis.seek(streamPos);
DataBufferByte buffer = new DataBufferByte(getLength());
readByteBuffer(iis,
buffer.getData(),
reader,
1.0F,
0.0F);
iis.reset();
WritableRaster raster =
Raster.createInterleavedRaster(buffer,
thumbWidth,
thumbHeight,
thumbWidth*3,
3,
new int [] {0, 1, 2},
null);
ColorModel cm = new ComponentColorModel(JPEG.JCS.sRGB,
false,
false,
ColorModel.OPAQUE,
DataBuffer.TYPE_BYTE);
return new BufferedImage(cm,
raster,
false,
null);
}
示例2: hasTransparentPixels
/**
* Return true if the BufferedImage argument has non-opaque
* bits in it and therefore can not be directly rendered by
* GDI. Return false if the image is opaque. If this function
* can not tell for sure whether the image has transparent
* pixels then it assumes that it does.
*/
protected boolean hasTransparentPixels(BufferedImage bufferedImage) {
ColorModel colorModel = bufferedImage.getColorModel();
boolean hasTransparency = colorModel == null
? true
: colorModel.getTransparency() != ColorModel.OPAQUE;
/*
* For the default INT ARGB check the image to see if any pixels are
* really transparent. If there are no transparent pixels then the
* transparency of the color model can be ignored.
* We assume that IndexColorModel images have already been
* checked for transparency and will be OPAQUE unless they actually
* have transparent pixels present.
*/
if (hasTransparency && bufferedImage != null) {
if (bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB ||
bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB_PRE) {
DataBuffer db = bufferedImage.getRaster().getDataBuffer();
SampleModel sm = bufferedImage.getRaster().getSampleModel();
if (db instanceof DataBufferInt &&
sm instanceof SinglePixelPackedSampleModel) {
SinglePixelPackedSampleModel psm =
(SinglePixelPackedSampleModel)sm;
// Stealing the data array for reading only...
int[] int_data =
SunWritableRaster.stealData((DataBufferInt) db, 0);
int x = bufferedImage.getMinX();
int y = bufferedImage.getMinY();
int w = bufferedImage.getWidth();
int h = bufferedImage.getHeight();
int stride = psm.getScanlineStride();
boolean hastranspixel = false;
for (int j = y; j < y+h; j++) {
int yoff = j * stride;
for (int i = x; i < x+w; i++) {
if ((int_data[yoff+i] & 0xff000000)!=0xff000000 ) {
hastranspixel = true;
break;
}
}
if (hastranspixel) {
break;
}
}
if (hastranspixel == false) {
hasTransparency = false;
}
}
}
}
return hasTransparency;
}