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https://codeberg.org/Freeyourgadget/Gadgetbridge
synced 2024-11-27 20:36:51 +01:00
Add functions for pushing bitmaps to Bangle.js, also add configurable MTU. If we receive a bigger data packet then we know we can send a bigger one too
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@ -20,7 +20,13 @@ import android.bluetooth.BluetoothGatt;
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import android.bluetooth.BluetoothGattCharacteristic;
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import android.content.Context;
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import android.content.Intent;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Canvas;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.net.Uri;
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import android.util.Base64;
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import android.widget.Toast;
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import androidx.localbroadcastmanager.content.LocalBroadcastManager;
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@ -75,6 +81,7 @@ public class BangleJSDeviceSupport extends AbstractBTLEDeviceSupport {
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private static final Logger LOG = LoggerFactory.getLogger(BangleJSDeviceSupport.class);
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private BluetoothGattCharacteristic rxCharacteristic = null;
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private BluetoothGattCharacteristic txCharacteristic = null;
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private int mtuSize = 20;
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private String receivedLine = "";
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private boolean realtimeHRM = false;
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@ -123,9 +130,9 @@ public class BangleJSDeviceSupport extends AbstractBTLEDeviceSupport {
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LOG.info("UART TX: " + str);
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byte[] bytes;
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bytes = str.getBytes(StandardCharsets.ISO_8859_1);
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for (int i=0;i<bytes.length;i+=20) {
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for (int i=0;i<bytes.length;i+=mtuSize) {
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int l = bytes.length-i;
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if (l>20) l=20;
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if (l>mtuSize) l=mtuSize;
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byte[] packet = new byte[l];
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System.arraycopy(bytes, i, packet, 0, l);
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builder.write(txCharacteristic, packet);
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@ -275,6 +282,9 @@ public class BangleJSDeviceSupport extends AbstractBTLEDeviceSupport {
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}
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if (BangleJSConstants.UUID_CHARACTERISTIC_NORDIC_UART_RX.equals(characteristic.getUuid())) {
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byte[] chars = characteristic.getValue();
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// check to see if we get more data - if so, increase out MTU for sending
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if (chars.length > mtuSize)
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mtuSize = chars.length;
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String packetStr = new String(chars);
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LOG.info("RX: " + packetStr);
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receivedLine += packetStr;
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@ -583,4 +593,58 @@ public class BangleJSDeviceSupport extends AbstractBTLEDeviceSupport {
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LOG.info("JSONException: " + e.getLocalizedMessage());
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}
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}
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/** Convert an Android bitmap to a base64 string for use in Espruino.
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* Currently only 1bpp, no scaling */
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public static String bitmapToEspruino(Bitmap bitmap) {
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int width = bitmap.getWidth();
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int height = bitmap.getHeight();
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byte bmp[] = new byte[((height * width + 7) >> 3) + 3];
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int n = 0, c = 0, cn = 0;
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bmp[n++] = (byte)width;
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bmp[n++] = (byte)height;
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bmp[n++] = 1;
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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boolean pixel = (bitmap.getPixel(x, y) & 255) > 128;
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c = (c << 1) | (pixel?1:0);
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cn++;
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if (cn == 8) {
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bmp[n++] = (byte)c;
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cn = 0;
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c = 0;
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}
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}
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}
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if (cn > 0) bmp[n++] = (byte)c;
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//LOG.info("BMP: " + width + "x"+height+" n "+n);
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// Convert to base64
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return Base64.encodeToString(bmp, Base64.DEFAULT).replaceAll("\n","");
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}
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/** Convert a drawable to a bitmap, for use with bitmapToEspruino */
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public static Bitmap drawableToBitmap(Drawable drawable) {
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if (drawable instanceof BitmapDrawable) {
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BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
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if (bitmapDrawable.getBitmap() != null) {
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return bitmapDrawable.getBitmap();
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}
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}
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int w = 1;
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int h = 8;
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if (drawable.getIntrinsicWidth() > 0 && drawable.getIntrinsicHeight() > 0) {
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} else {
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w = drawable.getIntrinsicWidth();
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h = drawable.getIntrinsicHeight();
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if (w>64) w=64;
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if (h>64) h=64;
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}
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Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
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Canvas canvas = new Canvas(bitmap);
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drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
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drawable.draw(canvas);
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return bitmap;
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}
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}
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