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PixelPaint: Add simple "Crop Image to Content" feature
This command finds the smallest non-empty content bounding rect by looking for the outermost non-transparent pixels in the image, and then crops the image to that rect. It's implemented in a pretty naive way, but it's a start. :^)
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@ -269,4 +269,50 @@ void Layer::set_edit_mode(Layer::EditMode mode)
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m_edit_mode = mode;
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}
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Optional<Gfx::IntRect> Layer::nonempty_content_bounding_rect() const
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{
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Optional<int> min_content_y;
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Optional<int> min_content_x;
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Optional<int> max_content_y;
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Optional<int> max_content_x;
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for (int y = 0; y < m_content_bitmap->height(); ++y) {
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for (int x = 0; x < m_content_bitmap->width(); ++x) {
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auto color = m_content_bitmap->get_pixel(x, y);
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if (color.alpha() == 0)
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continue;
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if (!min_content_x.has_value())
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min_content_x = x;
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else
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min_content_x = min(*min_content_x, x);
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if (!min_content_y.has_value())
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min_content_y = y;
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else
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min_content_y = min(*min_content_y, y);
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if (!max_content_x.has_value())
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max_content_x = x;
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else
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max_content_x = max(*max_content_x, x);
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if (!max_content_y.has_value())
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max_content_y = y;
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else
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max_content_y = max(*max_content_y, y);
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}
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}
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if (!min_content_x.has_value())
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return {};
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return Gfx::IntRect {
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*min_content_x,
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*min_content_y,
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*max_content_x - *min_content_x + 1,
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*max_content_y - *min_content_y + 1
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};
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}
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}
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