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[3.x] SpriteFramesEditor: preserve source texture margins when creating frames from AtlasTexture #51031

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30 changes: 16 additions & 14 deletions editor/plugins/sprite_frames_editor_plugin.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -200,34 +200,36 @@ void SpriteFramesEditor::_sheet_scroll_input(const Ref<InputEvent> &p_event) {

void SpriteFramesEditor::_sheet_add_frames() {
Size2i size = split_sheet_preview->get_texture()->get_size();
int h = split_sheet_h->get_value();
int v = split_sheet_v->get_value();
int frame_count_x = split_sheet_h->get_value();
int frame_count_y = split_sheet_v->get_value();
Size2 frame_size(size.width / frame_count_x, size.height / frame_count_y);

undo_redo->create_action(TTR("Add Frame"));

int fc = frames->get_frame_count(edited_anim);

AtlasTexture *atlas_source = Object::cast_to<AtlasTexture>(*split_sheet_preview->get_texture());

Rect2 region_rect = Rect2();
Point2 src_origin;
Rect2 src_region(Point2(), size);

if (atlas_source && atlas_source->get_atlas().is_valid()) {
region_rect = atlas_source->get_region();
AtlasTexture *src_atlas = Object::cast_to<AtlasTexture>(*split_sheet_preview->get_texture());
if (src_atlas && src_atlas->get_atlas().is_valid()) {
src_origin = src_atlas->get_region().position - src_atlas->get_margin().position;
src_region = src_atlas->get_region();
}

for (Set<int>::Element *E = frames_selected.front(); E; E = E->next()) {
int idx = E->get();
int width = size.width / h;
int height = size.height / v;
int xp = idx % h;
int yp = (idx - xp) / h;
int x = (xp * width) + region_rect.position.x;
int y = (yp * height) + region_rect.position.y;
Point2 frame_coords(idx % frame_count_x, idx / frame_count_x);

Rect2 frame(frame_coords * frame_size + src_origin, frame_size);
Rect2 region = frame.clip(src_region);
Rect2 margin(region == Rect2() ? Point2() : region.position - frame.position, frame.size - region.size);

Ref<AtlasTexture> at;
at.instance();
at->set_atlas(split_sheet_preview->get_texture());
at->set_region(Rect2(x, y, width, height));
at->set_region(region);
at->set_margin(margin);

undo_redo->add_do_method(frames, "add_frame", edited_anim, at, -1);
undo_redo->add_undo_method(frames, "remove_frame", edited_anim, fc);
Expand Down