ebiten/internal/glfw/canvas.go
2014-12-11 01:12:46 +09:00

103 lines
2.3 KiB
Go

/*
Copyright 2014 Hajime Hoshi
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 glfw
import (
glfw "github.com/go-gl/glfw3"
"github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/internal/opengl"
"image"
"runtime"
)
type canvas struct {
window *glfw.Window
graphicsContext *opengl.GraphicsContext
input input
funcs chan func()
funcsDone chan struct{}
}
func (c *canvas) draw(game ebiten.Game) (err error) {
c.use(func() {
c.graphicsContext.PreUpdate()
})
if err = game.Draw(&graphicsContext{c}); err != nil {
return
}
c.use(func() {
c.graphicsContext.PostUpdate()
c.window.SwapBuffers()
})
return
}
func (c *canvas) isClosed() bool {
return c.window.ShouldClose()
}
func (c *canvas) NewTextureID(img image.Image, filter ebiten.Filter) (ebiten.TextureID, error) {
var id ebiten.TextureID
var err error
c.use(func() {
id, err = opengl.NewTextureID(img, filter)
})
return id, err
}
func (c *canvas) NewRenderTargetID(width, height int, filter ebiten.Filter) (ebiten.RenderTargetID, error) {
var id ebiten.RenderTargetID
var err error
c.use(func() {
id, err = opengl.NewRenderTargetID(width, height, filter)
})
return id, err
}
func (c *canvas) run(width, height, scale int) {
go func() {
runtime.LockOSThread()
c.window.MakeContextCurrent()
glfw.SwapInterval(1)
for {
(<-c.funcs)()
c.funcsDone <- struct{}{}
}
}()
}
func (c *canvas) use(f func()) {
c.funcs <- f
<-c.funcsDone
}
func (c *canvas) update() {
c.input.update(c.window)
}
func (c *canvas) IsKeyPressed(key ebiten.Key) bool {
return c.input.IsKeyPressed(key)
}
func (c *canvas) IsMouseButtonPressed(button ebiten.MouseButton) bool {
return c.input.IsMouseButtonPressed(button)
}
func (c *canvas) CursorPosition() (x, y int) {
return c.input.CursorPosition()
}