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OpenDiablo2/d2core/d2gui/label.go
lord 7e3aff557b
Decouple asset manager from renderer (#730)
* improve AssetManager implementation

Notable changes are:
 * removed the individual managers inside of d2asset, only one asset manager
 * AssetManager now has caches for the types of files it loads
 * created a type for TextDictionary (the txt file structs)
 * fixed a file path bug in d2loader Source
 * fixed a asset stream bug in d2loader Asset
 * d2loader.Loader now needs a d2config.Config on creation (for resolving locale files)
 * updated the mpq file in d2asset test data, added test case for "sub-directory"
 * added a Data method to d2asset.Asset. The data is cached on first full read.
 * renamed ArchiveDataStream to DataStream in d2interface
 * moved palette utility func out of d2asset and into d2util
 * bugfix for MacOS mpq loader issue

* lint fixes, added data caching to filesystem asset

* adding comment for mpq asset close

* Decouple d2asset from d2render

Notable changes in d2common:
 * d2dcc.Load now fully decodes the dcc and stores the directions/frames in the dcc struct
 * un-exported dcc.decodeDirection, it is only used in d2dcc
 * removed font interface from d2interface, we only have one font implementation
 * added `Renderer` method to d2interface.Surface, animations use this to bind to a renderer and create surfaces as they need
 * added `BindRenderer` method to animation interface

Notable changes in d2common/d2asset:
 * **d2asset.NewAssetManager only needs to be passed a d2config.Config**, it is decoupled from d2render
 * exported Animation
 * Animation implementation binds to the renderer to create surfaces only on the first time it is rendered
 * font, dcc, dc6 initialization logic moved out of asset_manager.go
 * for dc6 and dcc animations, the process of decoding and creating render surfaces has been broken into different methods
 * the d2asset.Font struct now stores font table data for initialization purposes

Notable changes in d2core/d2render:
 * Surfaces store a renderer reference, this allows animations to bind to the renderer and create a surface just-in-time

**These last changes should have been a separate PR, sorry.**
Notable changes in d2core/d2ui:
 * ui.NewSprite now handles creating an animation internally, only needs image and palette path as arguments

Notable Changes in d2game:
Because of the change in d2ui, all instances of this code pattern...
```golang
animation, err := screen.asset.LoadAnimation(imgPath, palettePath)
sprite, err := screen.ui.NewSprite(animation)
```
... becomes this ...
```golang
sprite, err := screen.ui.NewSprite(imgPath, palettePath)
```
2020-09-14 17:31:45 -04:00

75 lines
1.4 KiB
Go

package d2gui
import (
"github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum"
"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
"github.com/OpenDiablo2/OpenDiablo2/d2core/d2asset"
)
// Label is renderable text
type Label struct {
widgetBase
renderer d2interface.Renderer
text string
font *d2asset.Font
surface d2interface.Surface
}
func createLabel(renderer d2interface.Renderer, text string, fontStyle FontStyle) (*Label, error) {
font, err := loadFont(fontStyle)
if err != nil {
return nil, err
}
label := &Label{
font: font,
renderer: renderer,
}
_ = label.setText(text)
label.SetVisible(true)
return label, nil
}
func (l *Label) render(target d2interface.Surface) error {
return target.Render(l.surface)
}
func (l *Label) getSize() (width, height int) {
return l.surface.GetSize()
}
// GetText returns the label text
func (l *Label) GetText() string {
return l.text
}
// SetText sets the label text
func (l *Label) SetText(text string) error {
if text == l.text {
return nil
}
return l.setText(text)
}
func (l *Label) setText(text string) error {
width, height := l.font.GetTextMetrics(text)
surface, err := l.renderer.NewSurface(width, height, d2enum.FilterNearest)
if err != nil {
return err
}
if err := l.font.RenderText(text, surface); err != nil {
return err
}
l.surface = surface
l.text = text
return nil
}