/**
* 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);
}
