Add OffscreenSurfaceTest (for unit testing).

1 files changed, 111 insertions, 0 deletions

diff --git a/android/sdl_android/src/androidTest/java/com/android/grafika/gles/OffscreenSurfaceTest.java b/android/sdl_android/src/androidTest/java/com/android/grafika/gles/OffscreenSurfaceTest.java
new file mode 100644
index 000000000..1e4f8182a
--- /dev/null
+++ b/android/sdl_android/src/androidTest/java/com/android/grafika/gles/OffscreenSurfaceTest.java
@@ -0,0 +1,111 @@
+package com.android.grafika.gles;
+
+import android.opengl.GLES20;
+import android.os.Environment;
+import android.util.Log;
+
+import com.smartdevicelink.AndroidTestCase2;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+
+public class OffscreenSurfaceTest extends AndroidTestCase2 {
+
+	private final String TAG = OffscreenSurfaceTest.class.getSimpleName();
+	private final int mWidth = 1280;
+	private final int mHeight = 720;
+	private final int mIterations = 100;
+
+	@Override
+	public void setUp() throws Exception {
+		super.setUp();
+	}
+
+	@Override
+	public void tearDown() throws Exception {
+		super.tearDown();
+	}
+
+
+	public void testReadPixels() {
+		EglCore eglCore = new EglCore(null, 0);
+		OffscreenSurface offscreenSurface = new OffscreenSurface(eglCore, mWidth, mHeight);
+		float time = runReadPixelsTest(offscreenSurface);
+		Log.d(TAG, "runReadPixelsTest returns " + time + " msec");
+	}
+
+	// HELPER test method
+	/**
+	 * Does a simple bit of rendering and then reads the pixels back.
+	 *
+	 * @return total time (msec order) spent on glReadPixels()
+	 */
+	private float runReadPixelsTest(OffscreenSurface eglSurface) {
+		long totalTime = 0;
+
+		eglSurface.makeCurrent();
+
+		ByteBuffer pixelBuf = ByteBuffer.allocateDirect(mWidth * mHeight * 4);
+		pixelBuf.order(ByteOrder.LITTLE_ENDIAN);
+
+		Log.d(TAG, "Running...");
+		float colorMult = 1.0f / mIterations;
+		for (int i = 0; i < mIterations; i++) {
+			if ((i % (mIterations / 8)) == 0) {
+				Log.d(TAG, "iteration " + i);
+			}
+
+			// Clear the screen to a solid color, then add a rectangle.  Change the color
+			// each time.
+			float r = i * colorMult;
+			float g = 1.0f - r;
+			float b = (r + g) / 2.0f;
+			GLES20.glClearColor(r, g, b, 1.0f);
+			GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+
+			GLES20.glEnable(GLES20.GL_SCISSOR_TEST);
+			GLES20.glScissor(mWidth / 4, mHeight / 4, mWidth / 2, mHeight / 2);
+			GLES20.glClearColor(b, g, r, 1.0f);
+			GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+			GLES20.glDisable(GLES20.GL_SCISSOR_TEST);
+
+			// Try to ensure that rendering has finished.
+			GLES20.glFinish();
+			GLES20.glReadPixels(0, 0, 1, 1,
+					GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, pixelBuf);
+
+			// Time individual extraction.  Ideally we'd be timing a bunch of these calls
+			// and measuring the aggregate time, but we want the isolated time, and if we
+			// just read the same buffer repeatedly we might get some sort of cache effect.
+			long startWhen = System.nanoTime();
+			GLES20.glReadPixels(0, 0, mWidth, mHeight,
+					GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, pixelBuf);
+			totalTime += System.nanoTime() - startWhen;
+		}
+		Log.d(TAG, "done");
+
+		// It's not the good idea to request external strage permission in unit test.
+		boolean requireStoragePermission = false;
+		if (requireStoragePermission) {
+			long startWhen = System.nanoTime();
+			File file = new File(Environment.getExternalStorageDirectory(),
+					"test.png");
+			try {
+				eglSurface.saveFrame(file);
+			} catch (IOException ioe) {
+				throw new RuntimeException(ioe);
+			}
+			Log.d(TAG, "Saved frame in " + ((System.nanoTime() - startWhen) / 1000000) + "ms");
+			assertTrue(file.exists());
+		} else {
+			// here' we can recognize Unit Test succeeded, but anyway checks to see totalTime and buffer capacity.
+			assertTrue(pixelBuf.capacity() > 0 && totalTime > 0);
+		}
+
+		return (float)totalTime / 1000000f;
+	}
+
+}