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Allow reading frame bitmap in window mode #831

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Allow reading frame bitmap in window mode #831

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b5b5705
Allow reading frame bitmap in window mode
Andrewschenko Feb 26, 2025
3055a26
Provide methods for taking screenshots
Andrewschenko Feb 26, 2025
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36 changes: 35 additions & 1 deletion wrappers/android/src/net/osmand/core/android/MapRendererView.java
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,7 @@ public abstract class MapRendererView extends FrameLayout {
/**
* Rendering global parameters
*/
private volatile boolean _frameReadingMode;
private volatile boolean _batterySavingMode;
private volatile int _maxFrameRate;
private volatile long _maxFrameTime;
Expand Down Expand Up @@ -384,6 +385,11 @@ public Bitmap getBitmap() {
_resultBitmap.copyPixelsFromBuffer(_byteBuffer);
_renderingResultIsReady = false;
}
if (_frameReadingMode) {
Matrix matrix = new Matrix();
matrix.preScale(1.0f, -1.0f);
_resultBitmap = Bitmap.createBitmap(_resultBitmap, 0, 0, _windowWidth, _windowHeight, matrix, true);
}
}
return _resultBitmap;
}
Expand Down Expand Up @@ -1488,6 +1494,29 @@ public final void dumpResourcesInfo() {
_mapRenderer.dumpResourcesInfo();
}

public final boolean enableFrameReader() {
if (_frameReadingMode || _byteBuffer != null) {
return true;
} else if (_windowWidth > 0 && _windowHeight > 0) {
synchronized (eglThread) {
_byteBuffer = ByteBuffer.allocateDirect(_windowWidth * _windowHeight * 4);
_renderingResultIsReady = false;
}
_frameReadingMode = true;
return true;
}
return false;
}

public final void disableFrameReader() {
if (_frameReadingMode) {
synchronized (eglThread) {
_byteBuffer = null;
}
_frameReadingMode = false;
}
}

public final boolean isBatterySavingModeEnabled() {
return _batterySavingMode;
}
Expand Down Expand Up @@ -2008,6 +2037,8 @@ public void onSurfaceChanged(GL10 gl, int width, int height) {
synchronized (eglThread) {
eglThread.ok = false;
eglThread.mapRenderer = _mapRenderer;
eglThread.surfaceWidth = width;
eglThread.surfaceHeight = height;
eglThread.startAndCompleteOperation(EGLThreadOperation.INITIALIZE_RENDERING);
ok = eglThread.ok;
}
Expand Down Expand Up @@ -2070,7 +2101,7 @@ public void onDrawFrame(GL10 gl) {

frameId++;

if (_byteBuffer != null) {
if (!_frameReadingMode && _byteBuffer != null) {
for (MapRendererViewListener listener : listeners) {
listener.onFrameReady(MapRendererView.this);
}
Expand Down Expand Up @@ -2425,6 +2456,9 @@ public void run() {
gl.glFlush();
if (byteBuffer != null) {
gl.glFinish();
if (_frameReadingMode) {
egl.eglSwapBuffers(display, surface);
}
synchronized (byteBuffer) {
byteBuffer.rewind();
gl.glReadPixels(0, 0, surfaceWidth, surfaceHeight,
Expand Down