ebiten/graphics/opengl/ids.go
2013-12-18 18:05:28 +09:00

84 lines
2.2 KiB
Go

package opengl
import (
"github.com/hajimehoshi/go-ebiten/graphics"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/rendertarget"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
"image"
"sync"
)
type ids struct {
lock sync.RWMutex
textures map[graphics.TextureId]*gtexture.Texture
renderTargets map[graphics.RenderTargetId]*gtexture.RenderTarget
renderTargetToTexture map[graphics.RenderTargetId]graphics.TextureId
counts chan int
}
func newIds() *ids {
ids := &ids{
textures: map[graphics.TextureId]*gtexture.Texture{},
renderTargets: map[graphics.RenderTargetId]*gtexture.RenderTarget{},
renderTargetToTexture: map[graphics.RenderTargetId]graphics.TextureId{},
counts: make(chan int),
}
go func() {
for i := 1; ; i++ {
ids.counts <- i
}
}()
return ids
}
func (i *ids) TextureAt(id graphics.TextureId) *gtexture.Texture {
i.lock.RLock()
defer i.lock.RUnlock()
return i.textures[id]
}
func (i *ids) RenderTargetAt(id graphics.RenderTargetId) *gtexture.RenderTarget {
i.lock.RLock()
defer i.lock.RUnlock()
return i.renderTargets[id]
}
func (i *ids) ToTexture(id graphics.RenderTargetId) graphics.TextureId {
i.lock.RLock()
defer i.lock.RUnlock()
return i.renderTargetToTexture[id]
}
func (i *ids) CreateTexture(img image.Image, filter graphics.Filter) (
graphics.TextureId, error) {
texture, err := texture.CreateFromImage(img, filter)
if err != nil {
return 0, err
}
textureId := graphics.TextureId(<-i.counts)
i.lock.Lock()
defer i.lock.Unlock()
i.textures[textureId] = texture
return textureId, nil
}
func (i *ids) CreateRenderTarget(width, height int, filter graphics.Filter) (
graphics.RenderTargetId, error) {
renderTarget, texture, err := rendertarget.Create(width, height, filter)
if err != nil {
return 0, err
}
renderTargetId := graphics.RenderTargetId(<-i.counts)
textureId := graphics.TextureId(<-i.counts)
i.lock.Lock()
defer i.lock.Unlock()
i.renderTargets[renderTargetId] = renderTarget
i.textures[textureId] = texture
i.renderTargetToTexture[renderTargetId] = textureId
return renderTargetId, nil
}