ebiten/graphics/opengl/ids.go

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Go
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2013-10-27 14:58:56 +01:00
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"
grendertarget "github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
"image"
)
type ids struct {
textures map[graphics.TextureId]*gtexture.Texture
renderTargets map[graphics.RenderTargetId]*grendertarget.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]*grendertarget.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 {
return i.textures[id]
}
func (i *ids) RenderTargetAt(id graphics.RenderTargetId) *grendertarget.RenderTarget {
return i.renderTargets[id]
}
func (i *ids) ToTexture(id graphics.RenderTargetId) graphics.TextureId {
return i.renderTargetToTexture[id]
}
func (i *ids) CreateTextureFromImage(img image.Image) (
graphics.TextureId, error) {
texture, err := texture.NewFromImage(img)
if err != nil {
return 0, err
}
textureId := graphics.TextureId(<-i.counts)
i.textures[textureId] = texture
return textureId, nil
}
func (i *ids) CreateRenderTarget(width, height int, filter texture.Filter) (
graphics.RenderTargetId, error) {
renderTarget, texture, err := rendertarget.New(width, height, filter)
if err != nil {
return 0, err
}
renderTargetId := graphics.RenderTargetId(<-i.counts)
textureId := graphics.TextureId(<-i.counts)
i.renderTargets[renderTargetId] = renderTarget
i.textures[textureId] = texture
i.renderTargetToTexture[renderTargetId] = textureId
return renderTargetId, nil
}