下面列出了怎么用java.awt.image.ConvolveOp的API类实例代码及写法，或者点击链接到github查看源代码。
public void fullEdgeDetector(BufferedImage source) {
float[] verticalMatrix = {-1, 0, 1, -2, 0, 2, -1, 0, 1};
float[] horizontalMatrix = {-1, -2, -1, 0, 0, 0, 1, 2, 1};
BufferedImage i1 = Photo.createBlankBi(source);
BufferedImage i2 = Photo.createBlankBi(source);
new ConvolveOp(new Kernel(3, 3, verticalMatrix), ConvolveOp.EDGE_NO_OP, null).filter(source, i1);
new ConvolveOp(new Kernel(3, 3, horizontalMatrix), ConvolveOp.EDGE_NO_OP, null).filter(source, i2);
int w = source.getWidth();
int h = source.getHeight();
for (int x = 0; x < w; x++) {
for (int y = 0; y < h; y++) {
float sum = 0.0f;
sum += Photo.getBrightness(i1, x, y);
sum += Photo.getBrightness(i2, x, y);
Photo.setBrightness(source, x, y, Math.min(1.0f, sum));
}
}
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
private static void crashTest() {
Raster src = createSrcRaster();
WritableRaster dst = createDstRaster();
ConvolveOp op = createConvolveOp(ConvolveOp.EDGE_NO_OP);
try {
op.filter(src, dst);
} catch (ImagingOpException e) {
/*
* The test pair of source and destination rasters
* may cause failure of the medialib convolution routine,
* so this exception is expected.
*
* The JVM crash is the only manifestation of this
* test failure.
*/
}
System.out.println("Test PASSED.");
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
private static void crashTest() {
Raster src = createSrcRaster();
WritableRaster dst = createDstRaster();
ConvolveOp op = createConvolveOp(ConvolveOp.EDGE_NO_OP);
try {
op.filter(src, dst);
} catch (ImagingOpException e) {
/*
* The test pair of source and destination rasters
* may cause failure of the medialib convolution routine,
* so this exception is expected.
*
* The JVM crash is the only manifestation of this
* test failure.
*/
}
System.out.println("Test PASSED.");
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
private static void crashTest() {
Raster src = createSrcRaster();
WritableRaster dst = createDstRaster();
ConvolveOp op = createConvolveOp(ConvolveOp.EDGE_NO_OP);
try {
op.filter(src, dst);
} catch (ImagingOpException e) {
/*
* The test pair of source and destination rasters
* may cause failure of the medialib convolution routine,
* so this exception is expected.
*
* The JVM crash is the only manifestation of this
* test failure.
*/
}
System.out.println("Test PASSED.");
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
private static void enableConvolveOp(RenderQueue rq,
SurfaceData srcData,
ConvolveOp cop)
{
// assert rq.lock.isHeldByCurrentThread();
boolean edgeZero =
cop.getEdgeCondition() == ConvolveOp.EDGE_ZERO_FILL;
Kernel kernel = cop.getKernel();
int kernelWidth = kernel.getWidth();
int kernelHeight = kernel.getHeight();
int kernelSize = kernelWidth * kernelHeight;
int sizeofFloat = 4;
int totalBytesRequired = 4 + 8 + 12 + (kernelSize * sizeofFloat);
RenderBuffer buf = rq.getBuffer();
rq.ensureCapacityAndAlignment(totalBytesRequired, 4);
buf.putInt(ENABLE_CONVOLVE_OP);
buf.putLong(srcData.getNativeOps());
buf.putInt(edgeZero ? 1 : 0);
buf.putInt(kernelWidth);
buf.putInt(kernelHeight);
buf.put(kernel.getKernelData(null));
}
public static void enableBufImgOp(RenderQueue rq, SurfaceData srcData,
BufferedImage srcImg,
BufferedImageOp biop)
{
if (biop instanceof ConvolveOp) {
enableConvolveOp(rq, srcData, (ConvolveOp)biop);
} else if (biop instanceof RescaleOp) {
enableRescaleOp(rq, srcData, srcImg, (RescaleOp)biop);
} else if (biop instanceof LookupOp) {
enableLookupOp(rq, srcData, srcImg, (LookupOp)biop);
} else {
throw new InternalError("Unknown BufferedImageOp");
}
}
private static ConvolveOp createConvolveOp(int edgeHint) {
final int kw = 3;
final int kh = 3;
float[] kdata = new float[kw * kh];
float v = 1f / kdata.length;
Arrays.fill(kdata, v);
Kernel k = new Kernel(kw, kh, kdata);
ConvolveOp op = new ConvolveOp(k, edgeHint, null);
return op;
}
private static BufferedImageOp getConvolveOp() {
int kw = 3;
int kh = 3;
int size = kw * kh;
float[] kdata = new float[size];
Arrays.fill(kdata, 1.0f / size);
Kernel k = new Kernel(kw, kh, kdata);
return new ConvolveOp(k);
}
private static BufferedImageOp getConvolveOp() {
int kw = 3;
int kh = 3;
int size = kw * kh;
float[] kdata = new float[size];
Arrays.fill(kdata, 1.0f / size);
Kernel k = new Kernel(kw, kh, kdata);
return new ConvolveOp(k);
}
public OpCompatibleImageTest() {
final Kernel kernel = new Kernel(3, 3,
new float[] {
1f/9f, 1f/9f, 1f/9f,
1f/9f, 1f/9f, 1f/9f,
1f/9f, 1f/9f, 1f/9f});
op = new ConvolveOp(kernel);
}
private static ConvolveOp createConvolveOp(int edgeHint) {
final int kw = 3;
final int kh = 3;
float[] kdata = new float[kw * kh];
float v = 1f / kdata.length;
Arrays.fill(kdata, v);
Kernel k = new Kernel(kw, kh, kdata);
ConvolveOp op = new ConvolveOp(k, edgeHint, null);
return op;
}
/**************************** ConvolveOp support ****************************/
public static boolean isConvolveOpValid(ConvolveOp cop) {
Kernel kernel = cop.getKernel();
int kw = kernel.getWidth();
int kh = kernel.getHeight();
// REMIND: we currently can only handle 3x3 and 5x5 kernels,
// but hopefully this is just a temporary restriction;
// see native shader comments for more details
if (!(kw == 3 && kh == 3) && !(kw == 5 && kh == 5)) {
return false;
}
return true;
}
public static void disableBufImgOp(RenderQueue rq, BufferedImageOp biop) {
if (biop instanceof ConvolveOp) {
disableConvolveOp(rq);
} else if (biop instanceof RescaleOp) {
disableRescaleOp(rq);
} else if (biop instanceof LookupOp) {
disableLookupOp(rq);
} else {
throw new InternalError("Unknown BufferedImageOp");
}
}
private static BufferedImageOp getConvolveOp() {
int kw = 3;
int kh = 3;
int size = kw * kh;
float[] kdata = new float[size];
Arrays.fill(kdata, 1.0f / size);
Kernel k = new Kernel(kw, kh, kdata);
return new ConvolveOp(k);
}
public static void disableBufImgOp(RenderQueue rq, BufferedImageOp biop) {
if (biop instanceof ConvolveOp) {
disableConvolveOp(rq);
} else if (biop instanceof RescaleOp) {
disableRescaleOp(rq);
} else if (biop instanceof LookupOp) {
disableLookupOp(rq);
} else {
throw new InternalError("Unknown BufferedImageOp");
}
}
private static BufferedImageOp createTestOp() {
final int size = 1;
final float v = 1f / (size * size);
final float[] k_data = new float[size * size];
Arrays.fill(k_data, v);
Kernel k = new Kernel(size, size, k_data);
return new ConvolveOp(k);
}
public static void disableBufImgOp(RenderQueue rq, BufferedImageOp biop) {
if (biop instanceof ConvolveOp) {
disableConvolveOp(rq);
} else if (biop instanceof RescaleOp) {
disableRescaleOp(rq);
} else if (biop instanceof LookupOp) {
disableLookupOp(rq);
} else {
throw new InternalError("Unknown BufferedImageOp");
}
}
private static BufferedImageOp createTestOp() {
final int size = 1;
final float v = 1f / (size * size);
final float[] k_data = new float[size * size];
Arrays.fill(k_data, v);
Kernel k = new Kernel(size, size, k_data);
return new ConvolveOp(k);
}
public OpCompatibleImageTest() {
final Kernel kernel = new Kernel(3, 3,
new float[] {
1f/9f, 1f/9f, 1f/9f,
1f/9f, 1f/9f, 1f/9f,
1f/9f, 1f/9f, 1f/9f});
op = new ConvolveOp(kernel);
}
public static void disableBufImgOp(RenderQueue rq, BufferedImageOp biop) {
if (biop instanceof ConvolveOp) {
disableConvolveOp(rq);
} else if (biop instanceof RescaleOp) {
disableRescaleOp(rq);
} else if (biop instanceof LookupOp) {
disableLookupOp(rq);
} else {
throw new InternalError("Unknown BufferedImageOp");
}
}
private static ConvolveOp createConvolveOp(int edgeHint) {
final int kw = 3;
final int kh = 3;
float[] kdata = new float[kw * kh];
float v = 1f / kdata.length;
Arrays.fill(kdata, v);
Kernel k = new Kernel(kw, kh, kdata);
ConvolveOp op = new ConvolveOp(k, edgeHint, null);
return op;
}
/**************************** ConvolveOp support ****************************/
public static boolean isConvolveOpValid(ConvolveOp cop) {
Kernel kernel = cop.getKernel();
int kw = kernel.getWidth();
int kh = kernel.getHeight();
// REMIND: we currently can only handle 3x3 and 5x5 kernels,
// but hopefully this is just a temporary restriction;
// see native shader comments for more details
if (!(kw == 3 && kh == 3) && !(kw == 5 && kh == 5)) {
return false;
}
return true;
}
private static BufferedImageOp createTestOp() {
final int size = 1;
final float v = 1f / (size * size);
final float[] k_data = new float[size * size];
Arrays.fill(k_data, v);
Kernel k = new Kernel(size, size, k_data);
return new ConvolveOp(k);
}