mirror of
https://github.com/OpenDiablo2/OpenDiablo2
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121 lines
2.6 KiB
Go
121 lines
2.6 KiB
Go
package d2surface
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import (
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"fmt"
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"image/color"
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"github.com/OpenDiablo2/OpenDiablo2/d2corehelper"
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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)
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type surfaceState struct {
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x int
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y int
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mode ebiten.CompositeMode
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filter ebiten.Filter
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color color.Color
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}
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type Surface struct {
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stateStack []surfaceState
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stateCurrent surfaceState
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image *ebiten.Image
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}
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func CreateSurface(image *ebiten.Image) *Surface {
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return &Surface{
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image: image,
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stateCurrent: surfaceState{
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filter: ebiten.FilterNearest,
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mode: ebiten.CompositeModeSourceOver,
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},
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}
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}
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func (s *Surface) PushTranslation(x, y int) {
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s.stateStack = append(s.stateStack, s.stateCurrent)
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s.stateCurrent.x += x
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s.stateCurrent.y += y
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}
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func (s *Surface) PushCompositeMode(mode ebiten.CompositeMode) {
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s.stateStack = append(s.stateStack, s.stateCurrent)
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s.stateCurrent.mode = mode
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}
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func (s *Surface) PushFilter(filter ebiten.Filter) {
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s.stateStack = append(s.stateStack, s.stateCurrent)
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s.stateCurrent.filter = filter
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}
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func (s *Surface) PushColor(color color.Color) {
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s.stateStack = append(s.stateStack, s.stateCurrent)
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s.stateCurrent.color = color
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}
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func (s *Surface) Pop() {
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count := len(s.stateStack)
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if count == 0 {
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panic("empty stack")
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}
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s.stateCurrent = s.stateStack[count-1]
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s.stateStack = s.stateStack[:count-1]
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}
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func (s *Surface) PopN(n int) {
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for i := 0; i < n; i++ {
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s.Pop()
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}
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}
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func (s *Surface) Render(image *ebiten.Image) error {
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opts := &ebiten.DrawImageOptions{CompositeMode: s.stateCurrent.mode}
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opts.GeoM.Translate(float64(s.stateCurrent.x), float64(s.stateCurrent.y))
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opts.Filter = s.stateCurrent.filter
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if s.stateCurrent.color != nil {
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opts.ColorM = d2corehelper.ColorToColorM(s.stateCurrent.color)
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}
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return s.image.DrawImage(image, opts)
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}
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func (s *Surface) DrawText(format string, params ...interface{}) {
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ebitenutil.DebugPrintAt(s.image, fmt.Sprintf(format, params...), s.stateCurrent.x, s.stateCurrent.y)
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}
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func (s *Surface) DrawLine(x, y int, color color.Color) {
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ebitenutil.DrawLine(
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s.image,
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float64(s.stateCurrent.x),
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float64(s.stateCurrent.y),
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float64(s.stateCurrent.x+x),
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float64(s.stateCurrent.y+y),
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color,
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)
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}
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func (s *Surface) DrawRect(width, height int, color color.Color) {
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ebitenutil.DrawRect(
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s.image,
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float64(s.stateCurrent.x),
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float64(s.stateCurrent.y),
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float64(width),
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float64(height),
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color,
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)
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}
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func (s *Surface) Clear(color color.Color) error {
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return s.image.Fill(color)
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}
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func (s *Surface) GetSize() (int, int) {
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return s.image.Size()
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}
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func (s *Surface) GetDepth() int {
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return len(s.stateStack)
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}
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