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Add opengl.Framebuffer.SetAsViewport

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This commit is contained in:
Hajime Hoshi 2014-12-31 15:22:15 +09:00
parent b1d4ce2120
commit fbcd04cda8
5 changed files with 45 additions and 36 deletions
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4
graphicscontext.go
View File

@ -20,7 +20,7 @@ import (
)
func newGraphicsContext(c *opengl.Context, screenWidth, screenHeight, screenScale int) (*graphicsContext, error) {
f, err := graphics.NewZeroFramebuffer(screenWidth*screenScale, screenHeight*screenScale)
f, err := graphics.NewZeroFramebuffer(c, screenWidth*screenScale, screenHeight*screenScale)
if err != nil {
return nil, err
}
@ -29,7 +29,7 @@ func newGraphicsContext(c *opengl.Context, screenWidth, screenHeight, screenScal
if err != nil {
return nil, err
}
screen, err := newInnerImage(texture)
screen, err := newInnerImage(c, texture)
if err != nil {
return nil, err
}

5
image.go
View File

@ -17,6 +17,7 @@ package ebiten
import (
"github.com/hajimehoshi/ebiten/internal"
"github.com/hajimehoshi/ebiten/internal/graphics"
"github.com/hajimehoshi/ebiten/internal/opengl"
"image"
"image/color"
)
@ -26,8 +27,8 @@ type innerImage struct {
texture *graphics.Texture
}
func newInnerImage(texture *graphics.Texture) (*innerImage, error) {
framebuffer, err := graphics.NewFramebufferFromTexture(texture)
func newInnerImage(c *opengl.Context, texture *graphics.Texture) (*innerImage, error) {
framebuffer, err := graphics.NewFramebufferFromTexture(c, texture)
if err != nil {
return nil, err
}

36
internal/graphics/framebuffer.go
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@ -15,11 +15,10 @@
package graphics
import (
"errors"
"fmt"
"github.com/go-gl/gl"
"github.com/hajimehoshi/ebiten/internal"
"github.com/hajimehoshi/ebiten/internal/graphics/internal/shader"
"github.com/hajimehoshi/ebiten/internal/opengl"
)
func orthoProjectionMatrix(left, right, bottom, top int) [4][4]float64 {
@ -37,13 +36,13 @@ func orthoProjectionMatrix(left, right, bottom, top int) [4][4]float64 {
}
type Framebuffer struct {
framebuffer gl.Framebuffer
framebuffer opengl.Framebuffer
width int
height int
flipY bool
}
func NewZeroFramebuffer(width, height int) (*Framebuffer, error) {
func NewZeroFramebuffer(c *opengl.Context, width, height int) (*Framebuffer, error) {
r := &Framebuffer{
width: width,
height: height,
@ -52,8 +51,8 @@ func NewZeroFramebuffer(width, height int) (*Framebuffer, error) {
return r, nil
}
func NewFramebufferFromTexture(texture *Texture) (*Framebuffer, error) {
framebuffer, err := createFramebuffer(gl.Texture(texture.native))
func NewFramebufferFromTexture(c *opengl.Context, texture *Texture) (*Framebuffer, error) {
framebuffer, err := c.NewFramebuffer(opengl.Texture(texture.native))
if err != nil {
return nil, err
}
@ -73,33 +72,10 @@ func (f *Framebuffer) Dispose() {
f.framebuffer.Delete()
}
func createFramebuffer(nativeTexture gl.Texture) (gl.Framebuffer, error) {
framebuffer := gl.GenFramebuffer()
framebuffer.Bind()
gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, nativeTexture, 0)
if gl.CheckFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE {
return 0, errors.New("creating framebuffer failed")
}
return framebuffer, nil
}
func (f *Framebuffer) setAsViewport() error {
gl.Flush()
f.framebuffer.Bind()
err := gl.CheckFramebufferStatus(gl.FRAMEBUFFER)
if err != gl.FRAMEBUFFER_COMPLETE {
if gl.GetError() != 0 {
return errors.New(fmt.Sprintf("glBindFramebuffer failed: %d", gl.GetError()))
}
return errors.New("glBindFramebuffer failed: the context is different?")
}
width := internal.NextPowerOf2Int(f.width)
height := internal.NextPowerOf2Int(f.height)
gl.Viewport(0, 0, width, height)
return nil
return f.framebuffer.SetAsViewport(width, height)
}
func (f *Framebuffer) projectionMatrix() [4][4]float64 {

32
internal/opengl/context.go
View File

@ -50,6 +50,26 @@ func (t Texture) Delete() {
gl.Texture(t).Delete()
}
type Framebuffer gl.Framebuffer
func (f Framebuffer) SetAsViewport(width, height int) error {
gl.Flush()
gl.Framebuffer(f).Bind()
err := gl.CheckFramebufferStatus(gl.FRAMEBUFFER)
if err != gl.FRAMEBUFFER_COMPLETE {
if gl.GetError() != 0 {
return errors.New(fmt.Sprintf("glBindFramebuffer failed: %d", gl.GetError()))
}
return errors.New("glBindFramebuffer failed: the context is different?")
}
gl.Viewport(0, 0, width, height)
return nil
}
func (f Framebuffer) Delete() {
gl.Framebuffer(f).Delete()
}
func NewContext() *Context {
c := &Context{
Nearest: filterNearest,
@ -83,3 +103,15 @@ func (c *Context) NewTexture(width, height int, pixels []uint8, filter Filter) (
return Texture(t), nil
}
func (c *Context) NewFramebuffer(texture Texture) (Framebuffer, error) {
f := gl.GenFramebuffer()
f.Bind()
gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, gl.Texture(texture), 0)
if gl.CheckFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE {
return 0, errors.New("creating framebuffer failed")
}
return Framebuffer(f), nil
}

4
ui.go
View File

@ -156,7 +156,7 @@ func (u *ui) newImageFromImage(img image.Image, filter Filter) (*Image, error) {
if err != nil {
return
}
innerImage, err = newInnerImage(texture)
innerImage, err = newInnerImage(u.glContext, texture)
})
if err != nil {
return nil, err
@ -173,7 +173,7 @@ func (u *ui) newImage(width, height int, filter Filter) (*Image, error) {
if err != nil {
return
}
innerImage, err = newInnerImage(texture)
innerImage, err = newInnerImage(u.glContext, texture)
innerImage.Clear()
})
if err != nil {