private boolean captureScreenshotTextureAndSetViewport() {
if (!attachEglContext()) {
return false;
}
try {
if (!mTexNamesGenerated) {
GLES10.glGenTextures(1, mTexNames, 0);
if (checkGlErrors("glGenTextures")) {
return false;
}
mTexNamesGenerated = true;
}
final SurfaceTexture st = new SurfaceTexture(mTexNames[0]);
final Surface s = new Surface(st);
try {
SurfaceControl.screenshot(
SurfaceControl.getBuiltInDisplay(SurfaceControl.BUILT_IN_DISPLAY_ID_MAIN), s);
} finally {
s.release();
}
st.updateTexImage();
st.getTransformMatrix(mTexMatrix);
// Set up texture coordinates for a quad.
// We might need to change this if the texture ends up being
// a different size from the display for some reason.
mTexCoordBuffer.put(0, 0f);
mTexCoordBuffer.put(1, 0f);
mTexCoordBuffer.put(2, 0f);
mTexCoordBuffer.put(3, 1f);
mTexCoordBuffer.put(4, 1f);
mTexCoordBuffer.put(5, 1f);
mTexCoordBuffer.put(6, 1f);
mTexCoordBuffer.put(7, 0f);
// Set up our viewport.
GLES10.glViewport(0, 0, mDisplayWidth, mDisplayHeight);
GLES10.glMatrixMode(GLES10.GL_PROJECTION);
GLES10.glLoadIdentity();
GLES10.glOrthof(0, mDisplayWidth, 0, mDisplayHeight, 0, 1);
GLES10.glMatrixMode(GLES10.GL_MODELVIEW);
GLES10.glLoadIdentity();
GLES10.glMatrixMode(GLES10.GL_TEXTURE);
GLES10.glLoadIdentity();
GLES10.glLoadMatrixf(mTexMatrix, 0);
} finally {
detachEglContext();
}
return true;
}
/**
* Init CameraManager gl texture id, camera SurfaceTexture, bind to EXTERNAL_OES, and redirect
* camera preview to the surfaceTexture.
*
* @throws IOException when camera cannot be open
*/
private void initCameraSurface() throws IOException {
// Gen openGL texture id
int texture[] = new int[1];
GLES10.glGenTextures(1, texture, 0);
mCameraTextureId = texture[0];
if (mCameraTextureId == 0) {
throw new RuntimeException("Cannot create openGL texture (initCameraSurface())");
}
// Camera preview is redirected to SurfaceTexture.
// SurfaceTexture works with TEXTURE_EXTERNAL_OES, so we bind this textureId so that camera
// will automatically fill it with its video.
GLES10.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, mCameraTextureId);
// Can't do mipmapping with camera source
GLES10.glTexParameterf(
GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES10.GL_TEXTURE_MIN_FILTER, GLES10.GL_LINEAR);
GLES10.glTexParameterf(
GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES10.GL_TEXTURE_MAG_FILTER, GLES10.GL_LINEAR);
// Clamp to edge is the only option
GLES10.glTexParameterf(
GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES10.GL_TEXTURE_WRAP_S, GLES10.GL_CLAMP_TO_EDGE);
GLES10.glTexParameterf(
GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES10.GL_TEXTURE_WRAP_T, GLES10.GL_CLAMP_TO_EDGE);
// create a SurfaceTexture associated to this openGL texture...
mCameraSurfaceTex = new SurfaceTexture(mCameraTextureId);
mCameraSurfaceTex.setDefaultBufferSize(640, 480);
// ... and redirect camera preview to it
mCameraManager.setPreviewSurface(mCameraSurfaceTex);
// Setup viewfinder
mViewFinder = new TexturedPlane(mViewFinderSize);
mViewFinder.setTexture(
BitmapDecoder.safeDecodeBitmap(mContext.getResources(), VIEWFINDER_RESSOURCE_ID));
mViewFinder.recycleTexture();
mViewFinder.translate(0, 0, VIEWFINDER_DISTANCE);
mViewFinder.setAlpha(VIEWFINDER_ATTENUATION_ALPHA);
}
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
/*
* By default, OpenGL enables features that improve quality
* but reduce performance. One might want to tweak that
* especially on software renderer.
*/
glDisable(GL_DITHER);
/*
* Some one-time OpenGL initialization can be made here
* probably based on features of this particular context
*/
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
glClearColor(.5f, .5f, .5f, 1);
glShadeModel(GL_SMOOTH);
glEnable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
/*
* Create our texture. This has to be done each time the
* surface is created.
*/
int[] textures = new int[1];
glGenTextures(1, textures, 0);
mTextureID = textures[0];
glBindTexture(GL_TEXTURE_2D, mTextureID);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
mTextureLoader.load(gl);
}
