mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 21:32:20 +02:00
61 lines
1.8 KiB
Go
61 lines
1.8 KiB
Go
package opengl
|
|
|
|
// #cgo LDFLAGS: -framework OpenGL
|
|
//
|
|
// #include <OpenGL/gl.h>
|
|
// #include <stdlib.h>
|
|
import "C"
|
|
import (
|
|
"github.com/hajimehoshi/go-ebiten/graphics"
|
|
)
|
|
|
|
type Device struct {
|
|
screenWidth int
|
|
screenHeight int
|
|
screenScale int
|
|
graphicsContext *GraphicsContext
|
|
offscreenTexture graphics.Texture
|
|
drawFunc func(graphics.GraphicsContext, graphics.TextureID)
|
|
}
|
|
|
|
func NewDevice(screenWidth, screenHeight, screenScale int,
|
|
drawFunc func(graphics.GraphicsContext, graphics.TextureID)) *Device {
|
|
device := &Device{
|
|
screenWidth: screenWidth,
|
|
screenHeight: screenHeight,
|
|
screenScale: screenScale,
|
|
graphicsContext: newGraphicsContext(screenWidth, screenHeight, screenScale),
|
|
drawFunc: drawFunc,
|
|
}
|
|
device.offscreenTexture =
|
|
device.graphicsContext.NewTexture(screenWidth, screenHeight)
|
|
return device
|
|
}
|
|
|
|
func (device *Device) Update() {
|
|
g := device.graphicsContext
|
|
C.glEnable(C.GL_TEXTURE_2D)
|
|
C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MIN_FILTER, C.GL_NEAREST)
|
|
C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_NEAREST)
|
|
g.SetOffscreen(device.offscreenTexture.ID)
|
|
g.Clear()
|
|
device.drawFunc(g, device.offscreenTexture.ID)
|
|
g.flush()
|
|
|
|
C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MIN_FILTER, C.GL_LINEAR)
|
|
C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_LINEAR)
|
|
g.resetOffscreen()
|
|
g.Clear()
|
|
geometryMatrix := graphics.IdentityGeometryMatrix()
|
|
geometryMatrix.SetA(float64(g.screenScale))
|
|
geometryMatrix.SetD(float64(g.screenScale))
|
|
g.DrawTexture(device.offscreenTexture.ID,
|
|
0, 0, device.screenWidth, device.screenHeight,
|
|
geometryMatrix, graphics.IdentityColorMatrix())
|
|
g.flush()
|
|
}
|
|
|
|
func (device *Device) TextureFactory() graphics.TextureFactory {
|
|
return device.graphicsContext
|
|
}
|