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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.camera;
/**
* The Java interface to JNI calls regarding mosaic preview rendering.
*
*/
public class MosaicRenderer
{
static
{
System.loadLibrary("jni_snapcammosaic");
}
/**
* Function to be called in onSurfaceCreated() to initialize
* the GL context, load and link the shaders and create the
* program. Returns a texture ID to be used for SurfaceTexture.
*
* @return textureID the texture ID of the newly generated texture to
* be assigned to the SurfaceTexture object.
*/
public static native int init();
/**
* Pass the drawing surface's width and height to initialize the
* renderer viewports and FBO dimensions.
*
* @param width width of the drawing surface in pixels.
* @param height height of the drawing surface in pixels.
* @param isLandscapeOrientation is the orientation of the activity layout in landscape.
*/
public static native void reset(int width, int height, boolean isLandscapeOrientation);
/**
* Calling this function will render the SurfaceTexture to a new 2D texture
* using the provided STMatrix.
*
* @param stMatrix texture coordinate transform matrix obtained from the
* Surface texture
*/
public static native void preprocess(float[] stMatrix);
/**
* This function calls glReadPixels to transfer both the low-res and high-res
* data from the GPU memory to the CPU memory for further processing by the
* mosaicing library.
*/
public static native void transferGPUtoCPU();
/**
* Function to be called in onDrawFrame() to update the screen with
* the new frame data.
*/
public static native void step();
/**
* Call this function when a new low-res frame has been processed by
* the mosaicing library. This will tell the renderer library to
* update its texture and warping transformation. Any calls to step()
* after this call will use the new image frame and transformation data.
*/
public static native void updateMatrix();
/**
* This function allows toggling between showing the input image data
* (without applying any warp) and the warped image data. For running
* the renderer as a viewfinder, we set the flag to false. To see the
* preview mosaic, we set the flag to true.
*
* @param flag boolean flag to set the warping to true or false.
*/
public static native void setWarping(boolean flag);
/**
* This function allows toggling between drawing the background full
* screen preview image data to screen and drawing the warped smaller
* preview on top of it. To render the full screen background preview,
* we set the falsg to true and to render the warped image on top of this
* we set the flag to false and flag in setWarping to true.
*
* @param flag boolean flag to set the warping to true or false.
*/
public static native void setPreviewBackground(boolean flag);
}
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