// package access for tests
static int[] addPngToIntArray(byte[] pngBytes, int[] counts) {
if (pngBytes == null) {
return counts;
}
// read PNG
final BufferedImage image = PngHelper.readImage(pngBytes);
int columns = image.getWidth();
int rows = image.getHeight();
if (counts == null) {
counts = new int[columns * rows];
} else {
assert counts.length == columns * rows;
}
for (int c = 0; c < columns; c++) {
for (int r = 0; r < rows; r++) {
counts[c * rows + r] += PngHelper.getCountAtColumnRow(image, rows, c, r);
}
}
return counts;
}
// package access for tests
static byte[] asPngBytes(
final int columns, final int rows, final int[] counts, ResponseBuilder rb) {
long startTimeNano = System.nanoTime();
BufferedImage image = PngHelper.newImage(columns, rows);
for (int c = 0; c < columns; c++) {
for (int r = 0; r < rows; r++) {
PngHelper.writeCountAtColumnRow(image, rows, c, r, counts[c * rows + r]);
}
}
byte[] bytes = PngHelper.writeImage(image);
long durationMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTimeNano);
log.debug(
"heatmap nativeSize={} pngSize={} pngTime={}",
(counts.length * 4),
bytes.length,
durationMs);
if (rb != null && rb.isDebugTimings()) {
rb.addDebug(durationMs, "timing", "heatmap png generation");
}
return bytes;
}
