runtime_display.go

/*
 * Copyright (c) 2021 The XGo Authors (xgo.dev). All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package spx

import (
	"github.com/goplus/spbase/mathf"
	coreproject "github.com/goplus/spx/v2/internal/core/project"
)

// -----------------------------------------------------------------------------
// Backdrop
// -----------------------------------------------------------------------------
func (p *Game) setBackdrop(backdrop any, wait bool) {
	if p.goSetCostume(backdrop) {
		p.setupBackdrop()
		p.doWindowSize()
		p.doWhenBackdropChanged(p.getCostumeName(), wait)
	}
}

func (p *Game) setupBackdrop() {
	imgW, imgH := p.getCostumeSize()
	layout := coreproject.ResolveBackdropLayout(
		imgW,
		imgH,
		float64(p.displayState.WorldWidth),
		float64(p.displayState.WorldHeight),
		p.displayState.MapMode,
	)
	if layout.RepeatScale != nil {
		p.setMaterialParamsVec4("repeat_scale", *layout.RepeatScale, false)
	}
	p.runtimeState.Scale = 1
	p.baseObj.scheduleCostumeUpdate()
	p.engine().SpriteMgr.SetScale(p.runtimeState.SyncSprite.GetId(), mathf.NewVec2(layout.ScaleX, layout.ScaleY))
}

// -----------------------------------------------------------------------------
// Display Size
// -----------------------------------------------------------------------------
func (p *Game) getWindowSize() mathf.Vec2 {
	x, y := p.windowSize()
	return mathf.NewVec2(float64(x), float64(y))
}

func (p *Game) windowSize() (int, int) {
	if p.displayState.WindowWidth == 0 {
		p.doWindowSize()
	}
	return p.displayState.WindowWidth, p.displayState.WindowHeight
}

func (p *Game) doWindowSize() {
	if p.displayState.WindowWidth == 0 {
		c := p.costumes[p.costumeIndex]
		p.displayState.WindowWidth, p.displayState.WindowHeight = c.getSize()
	}
}

func (p *Game) worldSize() (int, int) {
	if p.displayState.WorldWidth == 0 {
		p.doWorldSize()
	}
	return p.displayState.WorldWidth, p.displayState.WorldHeight
}

func (p *Game) doWorldSize() {
	if p.displayState.WorldWidth == 0 {
		c := p.costumes[p.costumeIndex]
		p.displayState.WorldWidth, p.displayState.WorldHeight = c.getSize()
	}
}