diff options
Diffstat (limited to 'src/com/android/camera/ui/HistogramView.java')
| -rw-r--r-- | src/com/android/camera/ui/HistogramView.java | 126 |
1 files changed, 64 insertions, 62 deletions
diff --git a/src/com/android/camera/ui/HistogramView.java b/src/com/android/camera/ui/HistogramView.java index 2ae2c40a8..822233c2b 100644 --- a/src/com/android/camera/ui/HistogramView.java +++ b/src/com/android/camera/ui/HistogramView.java @@ -18,7 +18,7 @@ package com.android.camera.ui; import android.content.Context; -import android.graphics.Bitmap; +import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; @@ -26,27 +26,33 @@ import android.util.AttributeSet; import android.view.View; import com.android.camera.CameraManager; +import org.codeaurora.snapcam.R; public class HistogramView extends View { private static final int STATS_SIZE = 256; + private static final int GRID_LINES = 10; - private int[] mData = new int[STATS_SIZE + 1]; + private float[] mData = new float[STATS_SIZE]; + private int mMaxDataValue; private boolean mDataValid; - private Bitmap mBitmap; - private Paint mPaint = new Paint(); - private Paint mPaintRect = new Paint(); - private Canvas mCanvas = new Canvas(); - private float mWidth; - private float mHeight; + private int mBgColor; + private int mBarColor; + private int mGridColor; + + private Paint mPaint = new Paint(); private CameraManager.CameraProxy mGraphCameraDevice; public HistogramView(Context context, AttributeSet attrs) { super(context,attrs); - mPaint.setFlags(Paint.ANTI_ALIAS_FLAG); - mPaintRect.setColor(0xFFFFFFFF); - mPaintRect.setStyle(Paint.Style.FILL); + Resources res = context.getResources(); + mBgColor = res.getColor(R.color.camera_control_bg_transparent); + mBarColor = res.getColor(R.color.histogram_bars); + mGridColor = res.getColor(R.color.histogram_grid_lines); + + mPaint.setAntiAlias(true); + mPaint.setStyle(Paint.Style.FILL); } public void setCamera(CameraManager.CameraProxy camera) { @@ -57,73 +63,69 @@ public class HistogramView extends View { } public void updateData(int[] data) { - if (data.length == mData.length) { - System.arraycopy(data, 0, mData, 0, data.length); - drawGraph(); - mDataValid = true; - invalidate(); + if (data.length != STATS_SIZE + 1) { + return; } - } - @Override - protected void onSizeChanged(int w, int h, int oldw, int oldh) { - mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.RGB_565); - mCanvas.setBitmap(mBitmap); - mWidth = w; - mHeight = h; - if (mDataValid) { - drawGraph(); + int maxValue; + //Assumption: The first element contains the maximum value. + if (data[0] == 0) { + maxValue = Integer.MIN_VALUE; + for (int i = 1; i <= STATS_SIZE ; i++) { + maxValue = Math.max(maxValue, data[i]); + } + } else { + maxValue = data[0]; } - super.onSizeChanged(w, h, oldw, oldh); + + // mData = data scaled by maxValue + for (int i = 0; i < STATS_SIZE; i++) { + mData[i] = Math.min((float) data[i + 1] / (float) maxValue, 1.0F); + } + mDataValid = true; + invalidate(); } @Override protected void onDraw(Canvas canvas) { - if (mDataValid && mBitmap != null) { - canvas.drawBitmap(mBitmap, 0, 0, null); - if (mGraphCameraDevice != null) { - mGraphCameraDevice.sendHistogramData(); - } + if (!mDataValid) { + return; } - } - private void drawGraph() { - final float border = 5; - float graphheight = mHeight - (2 * border); - float graphwidth = mWidth - (2 * border); - float bargap = 0.0f; - float barwidth = graphwidth/STATS_SIZE; + final int paddingLeft = getPaddingLeft(); + final int paddingRight = getPaddingRight(); + final int paddingTop = getPaddingTop(); + final int paddingBottom = getPaddingBottom(); + + float graphWidth = getWidth() - paddingLeft - paddingRight; + float graphHeight = getHeight() - paddingTop - paddingBottom; + float barWidth = graphWidth / STATS_SIZE; - mCanvas.drawColor(0xFFAAAAAA); - mPaint.setColor(Color.BLACK); + mPaint.setColor(mBgColor); + canvas.drawRect(0, 0, getWidth(), getHeight(), mPaint); - for (int k = 0; k <= (graphheight /32) ; k++) { - float y = (float)(32 * k)+ border; - mCanvas.drawLine(border, y, graphwidth + border , y, mPaint); + mPaint.setColor(mGridColor); + for (int row = 0; row <= GRID_LINES; row++) { + float y = (graphHeight * row / GRID_LINES) + paddingTop; + canvas.drawLine(paddingLeft, y, graphWidth + paddingLeft, y, mPaint); } - for (int j = 0; j <= (graphwidth /32); j++) { - float x = (float)(32 * j)+ border; - mCanvas.drawLine(x, border, x, graphheight + border, mPaint); + for (int col = 0; col <= GRID_LINES; col++) { + float x = (graphWidth * col / GRID_LINES) + paddingLeft; + canvas.drawLine(x, paddingTop, x, graphHeight + paddingTop, mPaint); } - //Assumption: The first element contains the maximum value. - int maxValue = Integer.MIN_VALUE; - if (mData[0] == 0) { - for (int i = 1; i <= STATS_SIZE ; i++) { - maxValue = Math.max(maxValue, mData[i]); - } - } else { - maxValue = mData[0]; + mPaint.setColor(mBarColor); + for (int i = 0; i < STATS_SIZE; i++) { + float barHeight = mData[i] * graphHeight; + float left = (barWidth * i) + paddingLeft; + float right = left + barWidth; + float bottom = graphHeight + paddingTop; + float top = bottom - barHeight; + canvas.drawRect(left, top, right, bottom, mPaint); } - for (int i = 1; i <= STATS_SIZE; i++) { - float scaled = Math.min(STATS_SIZE, - (float) mData[i] * (float) STATS_SIZE / (float) maxValue); - float left = (bargap * (i+1)) + (barwidth * i) + border; - float top = graphheight + border; - float right = left + barwidth; - float bottom = top - scaled; - mCanvas.drawRect(left, top, right, bottom, mPaintRect); + if (mGraphCameraDevice != null) { + mGraphCameraDevice.sendHistogramData(); } } } |