@Override
protected int[] filterPixels(int width, int height, int[] inPixels, Rect transformedSpace) {
int index = 0;
int[] outPixels = new int[width * height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int pixel = 0xffffffff;
for (int dy = -ySize; dy <= ySize; dy++) {
int iy = y + dy;
int ioffset;
if (0 <= iy && iy < height) {
ioffset = iy * width;
for (int dx = -xSize; dx <= xSize; dx++) {
int ix = x + dx;
if (0 <= ix && ix < width) {
pixel = PixelUtils.combinePixels(pixel, inPixels[ioffset + ix], PixelUtils.MIN);
}
}
}
}
outPixels[index++] = pixel;
}
}
return outPixels;
}
public int[] filter(int[] src, int w, int h) {
int width = w;
int height = h;
int[] inPixels = src;
int[] outPixels = new int[width * height];
// float sinAngle = (float)Math.sin(angle);
// float cosAngle = (float)Math.cos(angle);
// float total;
int cx = width / 2;
int cy = height / 2;
int index = 0;
float imageRadius = (float) Math.sqrt(cx * cx + cy * cy);
float translateX = (float) (distance * Math.cos(angle));
float translateY = (float) (distance * -Math.sin(angle));
float maxDistance = distance + Math.abs(rotation * imageRadius) + zoom * imageRadius;
int repetitions = (int) maxDistance;
Matrix t = new Matrix();
float[] p = new float[2];
if (premultiplyAlpha) ImageMath.premultiply(inPixels, 0, inPixels.length);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int a = 0, r = 0, g = 0, b = 0;
int count = 0;
for (int i = 0; i < repetitions; i++) {
int newX = x, newY = y;
float f = (float) i / repetitions;
p[0] = x;
p[1] = y;
t.reset();
t.preTranslate(cx + f * translateX, cy + f * translateY);
float s = 1 - zoom * f;
t.preScale(s, s);
if (rotation != 0) {
t.preRotate(-rotation * f);
}
t.preTranslate(-cx, -cy);
t.mapPoints(p, p);
newX = (int) p[0];
newY = (int) p[1];
if (newX < 0 || newX >= width) {
if (wrapEdges) newX = ImageMath.mod(newX, width);
else break;
}
if (newY < 0 || newY >= height) {
if (wrapEdges) newY = ImageMath.mod(newY, height);
else break;
}
count++;
int rgb = inPixels[newY * width + newX];
a += (rgb >> 24) & 0xff;
r += (rgb >> 16) & 0xff;
g += (rgb >> 8) & 0xff;
b += rgb & 0xff;
}
if (count == 0) {
outPixels[index] = inPixels[index];
} else {
a = PixelUtils.clamp((int) (a / count));
r = PixelUtils.clamp((int) (r / count));
g = PixelUtils.clamp((int) (g / count));
b = PixelUtils.clamp((int) (b / count));
outPixels[index] = (a << 24) | (r << 16) | (g << 8) | b;
}
index++;
}
}
if (premultiplyAlpha) {
ImageMath.unpremultiply(outPixels, 0, inPixels.length);
}
return outPixels;
}