/**
* Return the Image pixels in default Java int ARGB format.
*
* @return
*/
public static int[] getImagePixels(Image image) {
int[] pixelsARGB = null;
if (image != null) {
int imgw = image.getWidth(null);
int imgh = image.getHeight(null);
pixelsARGB = new int[imgw * imgh];
PixelGrabber pg = new PixelGrabber(image, 0, 0, imgw, imgh, pixelsARGB, 0, imgw);
try {
pg.grabPixels();
} catch (Exception e) {
GLApp.err("Pixel Grabbing interrupted!");
return null;
}
}
return pixelsARGB;
}
public static int gluScaleImage(
GL gl,
int format,
int widthin,
int heightin,
int typein,
ByteBuffer datain,
int widthout,
int heightout,
int typeout,
ByteBuffer dataout) {
int datainPos = datain.position();
int dataoutPos = dataout.position();
try {
int components;
ByteBuffer beforeimage;
ByteBuffer afterimage;
PixelStorageModes psm = new PixelStorageModes();
if ((widthin == 0) || (heightin == 0) || (widthout == 0) || (heightout == 0)) {
return (0);
}
if ((widthin < 0) || (heightin < 0) || (widthout < 0) || (heightout < 0)) {
return (GLU.GLU_INVALID_VALUE);
}
if (!legalFormat(format) || !legalType(typein) || !legalType(typeout)) {
return (GLU.GLU_INVALID_ENUM);
}
if (!isLegalFormatForPackedPixelType(format, typein)) {
return (GLU.GLU_INVALID_OPERATION);
}
if (!isLegalFormatForPackedPixelType(format, typeout)) {
return (GLU.GLU_INVALID_OPERATION);
}
beforeimage =
Buffers.newDirectByteBuffer(
image_size(widthin, heightin, format, GL2GL3.GL_UNSIGNED_SHORT));
afterimage =
Buffers.newDirectByteBuffer(
image_size(widthout, heightout, format, GL2GL3.GL_UNSIGNED_SHORT));
if (beforeimage == null || afterimage == null) {
return (GLU.GLU_OUT_OF_MEMORY);
}
retrieveStoreModes(gl, psm);
Image.fill_image(
psm,
widthin,
heightin,
format,
typein,
is_index(format),
datain,
beforeimage.asShortBuffer());
components = elements_per_group(format, 0);
ScaleInternal.scale_internal(
components,
widthin,
heightin,
beforeimage.asShortBuffer(),
widthout,
heightout,
afterimage.asShortBuffer());
Image.empty_image(
psm,
widthout,
heightout,
format,
typeout,
is_index(format),
afterimage.asShortBuffer(),
dataout);
return (0);
} finally {
datain.position(datainPos);
dataout.position(dataoutPos);
}
}