/**
* Create possibly volatile scratch image for fast painting. A scratch image can become
* invalidated, when this happens any actions involving it are ignored, and it needs to be
* recreated. Use isScratchImageValid() to check this.
*/
public static Image createScratchImage(int width, int height) {
try {
Image img =
(Image)
tryMethod(
output_comp,
"createVolatileImage",
new Object[] {new Integer(width), new Integer(height)});
if (img == null) {
// no such method -> create regular image
return output_comp.createImage(width, height);
}
// if (img.validate(output_comp.getGraphicsConfiguration())
// == VolatileImage.IMAGE_INCOMPATIBLE) {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
Integer valid = (Integer) tryMethod(img, "validate", new Object[] {gc});
// output_comp.getGraphicsConfiguration() });
if (valid.intValue() == 2) { // I checked, IMAGE_INCOMPATIBLE=2
// Hmm, somehow it didn't work. Create regular image.
return output_comp.createImage(width, height);
}
return img;
} catch (java.security.AccessControlException e) {
// we're not allowed to do this (we're probably an applet)
return output_comp.createImage(width, height);
}
}
public JGImage flip(boolean horiz, boolean vert) {
@SuppressWarnings("unused")
Image flipped = null;
JGPoint size = getSize();
int[] buffer = getPixels();
int[] flipbuf = new int[size.x * size.y];
if (vert && !horiz) {
for (int y = 0; y < size.y; y++) {
for (int x = 0; x < size.x; x++) {
flipbuf[(size.y - y - 1) * size.x + x] = buffer[(y * size.x) + x];
}
}
} else if (horiz && !vert) {
for (int y = 0; y < size.y; y++) {
for (int x = 0; x < size.x; x++) {
flipbuf[y * size.x + (size.x - x - 1)] = buffer[(y * size.x) + x];
}
}
} else if (horiz && vert) {
for (int y = 0; y < size.y; y++) {
for (int x = 0; x < size.x; x++) {
flipbuf[(size.y - y - 1) * size.x + (size.x - x - 1)] = buffer[(y * size.x) + x];
}
}
}
return new JREImage(
output_comp.createImage(new MemoryImageSource(size.x, size.y, flipbuf, 0, size.x)));
}
public JGImage crop(int x, int y, int width, int height) {
@SuppressWarnings("unused")
JGPoint size = getSize();
int[] buffer = getPixels(x, y, width, height);
return new JREImage(
output_comp.createImage(new MemoryImageSource(width, height, buffer, 0, width)));
}
/** for angle, only increments of 90 are allowed */
public JGImage rotate(int angle) {
@SuppressWarnings("unused")
Image rot = null;
JGPoint size = getSize();
int[] buffer = getPixels();
int[] rotate = new int[size.x * size.y];
int angletype = (angle / 90) & 3;
if (angletype == 0) return this;
if (angletype == 1) {
/* 1 2 3 4 9 5 1
* 5 6 7 8 => a 6 2
* 9 a b c b 7 3
* c 8 4 */
for (int y = 0; y < size.y; y++) {
for (int x = 0; x < size.x; x++) {
rotate[x * size.y + (size.y - 1 - y)] = buffer[(y * size.x) + x];
}
}
return new JREImage(
output_comp.createImage(new MemoryImageSource(size.y, size.x, rotate, 0, size.y)));
}
if (angletype == 3) {
/* 1 2 3 4 4 8 c
* 5 6 7 8 => 3 7 b
* 9 a b c 2 6 a
* 1 5 9 */
for (int y = 0; y < size.y; y++) {
for (int x = 0; x < size.x; x++) {
rotate[(size.x - x - 1) * size.y + y] = buffer[(y * size.x) + x];
}
}
return new JREImage(
output_comp.createImage(new MemoryImageSource(size.y, size.x, rotate, 0, size.y)));
}
if (angletype == 2) {
/* 1 2 3 4 c b a 9
* 5 6 7 8 => 8 7 6 5
* 9 a b c 4 3 2 1 */
for (int y = 0; y < size.y; y++) {
for (int x = 0; x < size.x; x++) {
rotate[((size.y - y - 1) * size.x) + (size.x - x - 1)] = buffer[(y * size.x) + x];
}
}
}
return new JREImage(
output_comp.createImage(new MemoryImageSource(size.x, size.y, rotate, 0, size.x)));
}
/**
* Turn a (possibly) translucent or indexed image into a display-compatible bitmask image using
* the given alpha threshold and render-to-background colour, or display-compatible translucent
* image. The alpha values in the image are set to either 0 (below threshold) or 255 (above
* threshold). The render-to-background colour bg_col is used to determine how the pixels
* overlapping transparent pixels should be rendered. The fast algorithm just sets the colour
* behind the transparent pixels in the image (for bitmask source images); the slow algorithm
* actually renders the image to a background of bg_col (for translucent sources).
*
* @param thresh alpha threshold between 0 and 255
* @param fast use fast algorithm (only set bg_col behind transp. pixels)
* @param bitmask true=use bitmask, false=use translucent
*/
public JGImage toDisplayCompatible(int thresh, JGColor bg_col, boolean fast, boolean bitmask) {
Color bgcol = new Color(bg_col.r, bg_col.g, bg_col.b);
int bgcol_rgb = (bgcol.getRed() << 16) | (bgcol.getGreen() << 8) | bgcol.getBlue();
JGPoint size = getSize();
int[] buffer = getPixels();
// render image to bg depending on bgcol
BufferedImage img_bg;
if (bitmask) {
img_bg = createCompatibleImage(size.x, size.y, Transparency.BITMASK);
} else {
img_bg = createCompatibleImage(size.x, size.y, Transparency.TRANSLUCENT);
}
int[] bg_buf;
if (!fast) {
Graphics g = img_bg.getGraphics();
g.setColor(bgcol);
// the docs say I could use bgcol in the drawImage as an
// equivalent to the following two lines, but this
// doesn't handle translucency properly and is _slower_
g.fillRect(0, 0, size.x, size.y);
g.drawImage(img, 0, 0, null);
bg_buf = new JREImage(img_bg).getPixels();
} else {
bg_buf = buffer;
}
// g.dispose();
// ColorModel rgb_bitmask = ColorModel.getRGBdefault();
// rgb_bitmask = new PackedColorModel(
// rgb_bitmask.getColorSpace(),25,0xff0000,0x00ff00,0x0000ff,
// 0x1000000, false, Transparency.BITMASK, DataBuffer.TYPE_INT);
// ColorSpace space, int bits, int rmask, int gmask, int bmask, int amask, boolean
// isAlphaPremultiplied, int trans, int transferType)
int[] thrsbuf = new int[size.x * size.y];
for (int y = 0; y < size.y; y++) {
for (int x = 0; x < size.x; x++) {
if (((buffer[y * size.x + x] >> 24) & 0xff) >= thresh) {
thrsbuf[y * size.x + x] = bg_buf[y * size.x + x] | (0xff << 24);
} else {
// explicitly set the colour of the transparent pixel.
// This makes a difference when scaling!
// thrsbuf[y*size.x+x]=bg_buf[y*size.x+x]&~(0xff<<24);
thrsbuf[y * size.x + x] = bgcol_rgb;
}
}
}
return new JREImage(
output_comp.createImage(
new MemoryImageSource(
size.x,
size.y,
// rgb_bitmask,
img_bg.getColorModel(), // display compatible bitmask
bitmask ? thrsbuf : bg_buf,
0,
size.x)));
}