// Returns true if the animation has been drawn.
// preview: camera preview view.
// review: snapshot of the preview before switching the camera.
public boolean drawAnimation(
GLCanvas canvas,
int x,
int y,
int width,
int height,
CameraScreenNail preview,
RawTexture review) {
long timeDiff = SystemClock.uptimeMillis() - mAnimStartTime;
if (timeDiff > ANIMATION_DURATION) return false;
float fraction = timeDiff / ANIMATION_DURATION;
// Calculate the position and the size of the preview.
float centerX = x + width / 2f;
float centerY = y + height / 2f;
float previewAnimScale = 1 - ZOOM_DELTA_PREVIEW * (1 - fraction);
float previewWidth = width * previewAnimScale;
float previewHeight = height * previewAnimScale;
int previewX = Math.round(centerX - previewWidth / 2);
int previewY = Math.round(centerY - previewHeight / 2);
// Calculate the position and the size of the review.
float reviewAnimScale = 1 + ZOOM_DELTA_REVIEW * fraction;
// Calculate how much preview is scaled.
// The scaling is done by PhotoView in Gallery so we don't have the
// scaling information but only the width and the height passed to this
// method. The inference of the scale ratio is done by matching the
// current width and the original width we have at first when the camera
// layout is inflated.
float scaleRatio = 1;
if (mPreviewFrameLayoutWidth != 0) {
scaleRatio = (float) width / mPreviewFrameLayoutWidth;
} else {
Log.e(TAG, "mPreviewFrameLayoutWidth is 0.");
}
float reviewWidth = mReviewDrawingWidth * reviewAnimScale * scaleRatio;
float reviewHeight = mReviewDrawingHeight * reviewAnimScale * scaleRatio;
int reviewX = Math.round(centerX - reviewWidth / 2);
int reviewY = Math.round(centerY - reviewHeight / 2);
// Draw the preview.
float alpha = canvas.getAlpha();
canvas.setAlpha(fraction); // fade in
preview.directDraw(
canvas, previewX, previewY, Math.round(previewWidth), Math.round(previewHeight));
// Draw the review.
canvas.setAlpha((1f - fraction) * INITIAL_DARKEN_ALPHA); // fade out
review.draw(canvas, reviewX, reviewY, Math.round(reviewWidth), Math.round(reviewHeight));
canvas.setAlpha(alpha);
return true;
}
public boolean drawDarkPreview(
GLCanvas canvas, int x, int y, int width, int height, RawTexture review) {
// Calculate the position and the size.
float centerX = x + width / 2f;
float centerY = y + height / 2f;
float scaleRatio = 1;
if (mPreviewFrameLayoutWidth != 0) {
scaleRatio = (float) width / mPreviewFrameLayoutWidth;
} else {
Log.e(TAG, "mPreviewFrameLayoutWidth is 0.");
}
float reviewWidth = mReviewDrawingWidth * scaleRatio;
float reviewHeight = mReviewDrawingHeight * scaleRatio;
int reviewX = Math.round(centerX - reviewWidth / 2);
int reviewY = Math.round(centerY - reviewHeight / 2);
// Draw the review.
float alpha = canvas.getAlpha();
canvas.setAlpha(INITIAL_DARKEN_ALPHA);
review.draw(canvas, reviewX, reviewY, Math.round(reviewWidth), Math.round(reviewHeight));
canvas.setAlpha(alpha);
return true;
}