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Exponential regression rule for Pixelate scale

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This commit is contained in:
SuslikV
2020-04-27 21:26:07 +02:00
parent 15c3efb76b
commit 4f60f45976
1 changed files with 7 additions and 3 deletions
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10
src/effects/Pixelate.cpp
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@@ -33,7 +33,7 @@
using namespace openshot;
/// Blank constructor, useful when using Json to load the effect properties
Pixelate::Pixelate() : pixelization(0.7), left(0.0), top(0.0), right(0.0), bottom(0.0) {
Pixelate::Pixelate() : pixelization(0.5), left(0.0), top(0.0), right(0.0), bottom(0.0) {
// Init effect properties
init_effect_details();
}
@@ -68,7 +68,7 @@ std::shared_ptr<Frame> Pixelate::GetFrame(std::shared_ptr<Frame> frame, int64_t
std::shared_ptr<QImage> frame_image = frame->GetImage();
// Get current keyframe values
double pixelization_value = 1.0 - std::min(fabs(pixelization.GetValue(frame_number)), 1.0);
double pixelization_value = std::min(pow(0.001, fabs(pixelization.GetValue(frame_number))), 1.0);
double left_value = left.GetValue(frame_number);
double top_value = top.GetValue(frame_number);
double right_value = right.GetValue(frame_number);
@@ -82,8 +82,12 @@ std::shared_ptr<Frame> Pixelate::GetFrame(std::shared_ptr<Frame> frame, int64_t
QRect area(QPoint(0,0), frame_image->size());
area = area.marginsRemoved({int(left_value * w), int(top_value * h), int(right_value * w), int(bottom_value * h)});
int scale_to = (int) (area.width() * pixelization_value);
if (scale_to < 1) {
scale_to = 1; // Not less than one pixel
}
// Copy and scale pixels in area to be pixelated
auto frame_scaled = frame_image->copy(area).scaledToWidth(area.width() * pixelization_value, Qt::SmoothTransformation);
auto frame_scaled = frame_image->copy(area).scaledToWidth(scale_to, Qt::SmoothTransformation);
// Draw pixelated image back over original
QPainter painter(frame_image.get());