doodle/pkg/editor_ui_doodad.go

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package doodle
// XXX REFACTOR XXX
// This function only uses EditorUI and not Doodle and is a candidate for
// refactor into a subpackage if EditorUI itself can ever be decoupled.
import (
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"git.kirsle.net/SketchyMaze/doodle/pkg/balance"
"git.kirsle.net/SketchyMaze/doodle/pkg/doodads"
"git.kirsle.net/SketchyMaze/doodle/pkg/level"
"git.kirsle.net/SketchyMaze/doodle/pkg/log"
"git.kirsle.net/SketchyMaze/doodle/pkg/uix"
"git.kirsle.net/go/render"
)
// DraggableActor is a Doodad being dragged from the Doodad palette.
type DraggableActor struct {
canvas *uix.Canvas
doodad *doodads.Doodad // if a new one from the palette
actor *level.Actor // if a level actor
}
Optimize memory by freeing up SDL2 textures * Added to the F3 Debug Overlay is a "Texture:" label that counts the number of textures currently loaded by the (SDL2) render engine. * Added Teardown() functions to Level, Doodad and the Chunker they both use to free up SDL2 textures for all their cached graphics. * The Canvas.Destroy() function now cleans up all textures that the Canvas is responsible for: calling the Teardown() of the Level or Doodad, calling Destroy() on all level actors, and cleaning up Wallpaper textures. * The Destroy() method of the game's various Scenes will properly Destroy() their canvases to clean up when transitioning to another scene. The MainScene, MenuScene, EditorScene and PlayScene. * Fix the sprites package to actually cache the ui.Image widgets. The game has very few sprites so no need to free them just yet. Some tricky places that were leaking textures have been cleaned up: * Canvas.InstallActors() destroys the canvases of existing actors before it reinitializes the list and installs the replacements. * The DraggableActor when the user is dragging an actor around their level cleans up the blueprint masked drag/drop actor before nulling it out. Misc changes: * The player character cheats during Play Mode will immediately swap out the player character on the current level. * Properly call the Close() function instead of Hide() to dismiss popup windows. The Close() function itself calls Hide() but also triggers WindowClose event handlers. The Doodad Dropper subscribes to its close event to free textures for all its doodad canvases.
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// Teardown the DraggableActor and free its textures.
func (da *DraggableActor) Teardown() {
log.Debug("Teardown DraggableActor")
da.canvas.Destroy()
}
// startDragActor begins the drag event for a Doodad onto a level.
// actor may be nil (if you drag a new doodad from the palette) or otherwise
// is an existing actor from the level.
func (u *EditorUI) startDragActor(doodad *doodads.Doodad, actor *level.Actor) {
u.Supervisor.DragStart()
if doodad == nil {
if actor != nil {
obj, err := doodads.LoadFromEmbeddable(actor.Filename, u.Scene.Level)
if err != nil {
log.Error("startDragExistingActor: actor doodad name %s not found: %s", actor.Filename, err)
return
}
doodad = obj
} else {
panic("EditorUI.startDragActor: doodad AND/OR actor is required, but neither were given")
}
}
// Size and scale this doodad according to the zoom level.
size := doodad.Rect()
size.W = u.Canvas.ZoomMultiply(size.W)
size.H = u.Canvas.ZoomMultiply(size.H)
// Create the canvas to render on the mouse cursor.
drawing := uix.NewCanvas(doodad.Layers[0].Chunker.Size, false)
drawing.LoadDoodad(doodad)
drawing.Resize(size)
drawing.Zoom = u.Canvas.Zoom
drawing.SetBackground(render.RGBA(0, 0, 1, 0)) // TODO: invisible becomes white
drawing.MaskColor = balance.DragColor // blueprint effect
u.DraggableActor = &DraggableActor{
canvas: drawing,
doodad: doodad,
actor: actor,
}
}