This method is required for all derived classes of EffectBase, and returns a modified openshot::Frame object
| 54 | // This method is required for all derived classes of EffectBase, and returns a |
| 55 | // modified openshot::Frame object |
| 56 | std::shared_ptr<openshot::Frame> |
| 57 | Pixelate::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number) |
| 58 | { |
| 59 | // Get the frame's image |
| 60 | std::shared_ptr<QImage> frame_image = frame->GetImage(); |
| 61 | |
| 62 | // Get current keyframe values |
| 63 | double pixelization_value = std::min(pow(0.001, fabs(pixelization.GetValue(frame_number))), 1.0); |
| 64 | double left_value = left.GetValue(frame_number); |
| 65 | double top_value = top.GetValue(frame_number); |
| 66 | double right_value = right.GetValue(frame_number); |
| 67 | double bottom_value = bottom.GetValue(frame_number); |
| 68 | |
| 69 | if (pixelization_value > 0.0) { |
| 70 | int w = frame_image->width(); |
| 71 | int h = frame_image->height(); |
| 72 | |
| 73 | // Define area we're working on in terms of a QRect with QMargins applied |
| 74 | QRect area(QPoint(0,0), frame_image->size()); |
| 75 | area = area.marginsRemoved({int(left_value * w), int(top_value * h), int(right_value * w), int(bottom_value * h)}); |
| 76 | |
| 77 | int scale_to = (int) (area.width() * pixelization_value); |
| 78 | if (scale_to < 1) { |
| 79 | scale_to = 1; // Not less than one pixel |
| 80 | } |
| 81 | // Copy and scale pixels in area to be pixelated |
| 82 | auto frame_scaled = frame_image->copy(area).scaledToWidth(scale_to, Qt::SmoothTransformation); |
| 83 | |
| 84 | // Draw pixelated image back over original |
| 85 | QPainter painter(frame_image.get()); |
| 86 | painter.drawImage(area, frame_scaled); |
| 87 | painter.end(); |
| 88 | } |
| 89 | |
| 90 | // return the modified frame |
| 91 | return frame; |
| 92 | } |
| 93 | |
| 94 | bool Pixelate::UseCustomMaskBlend(int64_t frame_number) const { |
| 95 | (void) frame_number; |