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Support backdrop mode : fillCut, fillRatio TODO repeat #450

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merged 1 commit into from
Nov 22, 2024
Merged

Support backdrop mode : fillCut, fillRatio TODO repeat #450

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42 changes: 40 additions & 2 deletions game.go
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Original file line number Diff line number Diff line change
Expand Up @@ -429,8 +429,6 @@ func (p *Game) loadIndex(g reflect.Value, proj *projConfig) (err error) {
log.Println("==> SetWorldSize", p.worldWidth_, p.worldHeight_)
}
p.mapMode = toMapMode(proj.Map.Mode)
// setup proxy's property
p.proxy = engine.SyncNewBackdropProxy(p, p.getCostumePath(), p.getCostumeRenderScale())

p.doWindowSize() // set window size

Expand All @@ -447,6 +445,9 @@ func (p *Game) loadIndex(g reflect.Value, proj *projConfig) (err error) {

p.Camera.init(p, float64(p.windowWidth_), float64(p.windowHeight_), float64(p.worldWidth_), float64(p.worldHeight_))

// setup proxy's property
p.proxy = engine.SyncNewBackdropProxy(p, p.getCostumePath(), p.getCostumeRenderScale())
p.setupBackdrop()
inits := make([]Sprite, 0, len(proj.Zorder))
for _, v := range proj.Zorder {
if name, ok := v.(string); ok {
Expand Down Expand Up @@ -483,6 +484,43 @@ func (p *Game) loadIndex(g reflect.Value, proj *projConfig) (err error) {
return
}

func (p *Game) setupBackdrop() {
var imgW, imgH, dstW, dstH float64
imgW, imgH = p.getCostumeSize()
worldW := float64(p.worldWidth_)
worldH := float64(p.worldHeight_)
imgRadio := (imgW / imgH)
worldRadio := (worldW / worldH)
// scale image's height to fit world's height
isScaleHeight := imgRadio > worldRadio
switch p.mapMode {
default:
dstW = worldW
dstH = worldH
case mapModeRepeat:
println("TODO implement mapModeRepeat")
case mapModeFillCut:
if isScaleHeight {
dstW = worldW
dstH = dstW / imgRadio
} else {
dstH = worldH
dstW = dstH * imgRadio
}
case mapModeFillRatio:
if isScaleHeight {
dstH = worldH
dstW = dstH * imgRadio
} else {
dstW = worldW
dstH = dstW / imgRadio
}
}
scaleX := dstW / imgW
scaleY := dstH / imgH
engine.SyncSpriteSetScale(p.proxy.GetId(), engine.NewVec2(scaleX, scaleY))
}

func (p *Game) endLoad(g reflect.Value, proj *projConfig) (err error) {
if debugLoad {
log.Println("==> EndLoad")
Expand Down