static void drawLineOnCairoContext(GraphicsContext* graphicsContext, cairo_t* context, const FloatPoint& point1, const FloatPoint& point2)
{
StrokeStyle style = graphicsContext->strokeStyle();
if (style == NoStroke)
return;
const Color& strokeColor = graphicsContext->strokeColor();
int strokeThickness = floorf(graphicsContext->strokeThickness());
if (graphicsContext->strokeThickness() < 1)
strokeThickness = 1;
int patternWidth = 0;
if (style == DottedStroke)
patternWidth = strokeThickness;
else if (style == DashedStroke)
patternWidth = 3 * strokeThickness;
bool isVerticalLine = point1.x() == point2.x();
FloatPoint point1OnPixelBoundaries = point1;
FloatPoint point2OnPixelBoundaries = point2;
GraphicsContext::adjustLineToPixelBoundaries(point1OnPixelBoundaries, point2OnPixelBoundaries, strokeThickness, style);
cairo_set_antialias(context, CAIRO_ANTIALIAS_NONE);
if (patternWidth) {
// Do a rect fill of our endpoints. This ensures we always have the
// appearance of being a border. We then draw the actual dotted/dashed line.
FloatRect firstRect(point1OnPixelBoundaries, FloatSize(strokeThickness, strokeThickness));
FloatRect secondRect(point2OnPixelBoundaries, FloatSize(strokeThickness, strokeThickness));
if (isVerticalLine) {
firstRect.move(-strokeThickness / 2, -strokeThickness);
secondRect.move(-strokeThickness / 2, 0);
} else {
firstRect.move(-strokeThickness, -strokeThickness / 2);
secondRect.move(0, -strokeThickness / 2);
}
fillRectWithColor(context, firstRect, strokeColor);
fillRectWithColor(context, secondRect, strokeColor);
int distance = (isVerticalLine ? (point2.y() - point1.y()) : (point2.x() - point1.x())) - 2 * strokeThickness;
double patternOffset = calculateStrokePatternOffset(distance, patternWidth);
double patternWidthAsDouble = patternWidth;
cairo_set_dash(context, &patternWidthAsDouble, 1, patternOffset);
}
setSourceRGBAFromColor(context, strokeColor);
cairo_set_line_width(context, strokeThickness);
cairo_move_to(context, point1OnPixelBoundaries.x(), point1OnPixelBoundaries.y());
cairo_line_to(context, point2OnPixelBoundaries.x(), point2OnPixelBoundaries.y());
cairo_stroke(context);
}
void HaarDetectorBody::Process(void)
{
const Mat& frameIn = imageMessageIn_->Normalized();
outputFrame_ = imageMessageIn_->Rgb().clone();
prevObjects_ = objects_;
if(objects_.empty() || imageMessageIn_->GetMetaData().GetFrameNumber() % 30 == 0)
{
const vector<Rect>& rectangles = rectangleMessageIn_->GetRectangles();
Rect firstRect(0, 0, frameIn.cols, frameIn.rows);
if(rectangles.size() > 0)
PartitionateFace(rectangles[0], &firstRect);
Mat frameInRect = frameIn(firstRect);
Mat normalizedRes(cvRound(frameInRect.rows * param_->imgScaleFactor), cvRound(frameInRect.cols * param_->imgScaleFactor), CV_8UC1);
resize(frameInRect, normalizedRes, normalizedRes.size());
objects_.clear();
cascade_.detectMultiScale(
normalizedRes,
objects_,
param_->scaleFactor,
param_->minNeighbors,
param_->flags,
param_->minSize,
param_->maxSize
);
if(!objects_.empty())
{
for(vector<Rect>::iterator r = objects_.begin(); r != objects_.end(); r++)
{
r->x = cvRound(r->x * param_->invImgScaleFactor) + firstRect.x;
r->y = cvRound(r->y * param_->invImgScaleFactor) + firstRect.y;
r->width = cvRound(r->width * param_->invImgScaleFactor);
r->height = cvRound(r->height * param_->invImgScaleFactor);
rectangle(outputFrame_, *r, Scalar(255.0, 0.0, 0.0), 2);
putText(outputFrame_, GetFullName(), r->tl(), FONT_HERSHEY_SIMPLEX, 0.5, Scalar(255.0, 0.0, 0.0));
}
}
}
else if(!prevObjects_.empty() && prevImageMessageIn_)
{
const Mat& prevFrame = prevImageMessageIn_->Normalized();
param_->ClearLKVectors();
for(vector<Rect>::const_iterator r = prevObjects_.begin(); r != prevObjects_.end(); r++)
{
param_->prevPoints.push_back(Point(cvRound(r->x + r->width * 0.5), cvRound(r->y + r->height * 0.5)));
param_->objSizes.push_back(r->size());
}
calcOpticalFlowPyrLK(
prevFrame, frameIn,
param_->prevPoints, param_->nextPoints,
param_->status, param_->error,
param_->winSize,
param_->maxLevel,
param_->criteria,
param_->LKflags,
param_->minEigThreshold
);
const vector<Point2f>& actPoints = (param_->prevPoints.size() == param_->nextPoints.size() ? param_->nextPoints : param_->prevPoints);
for(size_t i = 0; i < actPoints.size(); i++)
{
Point tl(cvRound(actPoints[i].x - param_->objSizes[i].width * 0.5), cvRound(actPoints[i].y - param_->objSizes[i].height * 0.5));
Point br(cvRound(actPoints[i].x + param_->objSizes[i].width * 0.5), cvRound(actPoints[i].y + param_->objSizes[i].height * 0.5));
objects_[i] = Rect(tl, br);
rectangle(outputFrame_, objects_[i], Scalar(0.0, 0.0, 255.0), 2);
putText(outputFrame_, GetFullName(), tl, FONT_HERSHEY_SIMPLEX, 0.5, Scalar(0.0, 0.0, 255.0));
}
}
IMSHOW(GetFullName(), outputFrame_);
output_ = HasSuccessor() ? new RectangleMessage(objects_) : NULL;
}