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graphics: Cache framebuffers
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parent
936942a28d
commit
a67a8a03ec
@ -63,11 +63,10 @@ func GetProgramID(p Program) ProgramID {
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}
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}
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type context struct {
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type context struct {
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gl *webgl.Context
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gl *webgl.Context
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lastFramebuffer Framebuffer
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}
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}
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var lastFramebuffer Framebuffer
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func NewContext() *Context {
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func NewContext() *Context {
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var gl *webgl.Context
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var gl *webgl.Context
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@ -139,12 +138,20 @@ func (c *Context) NewTexture(width, height int, pixels []uint8, filter Filter) (
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return Texture{t}, nil
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return Texture{t}, nil
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}
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}
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func (c *Context) bindFramebuffer(f Framebuffer) {
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gl := c.gl
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// TODO: Fix this after the GopherJS bug was fixed (#159)
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if c.lastFramebuffer.Object != f.Object {
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gl.BindFramebuffer(gl.FRAMEBUFFER, f.Object)
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c.lastFramebuffer = f
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}
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}
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func (c *Context) FramebufferPixels(f Framebuffer, width, height int) ([]uint8, error) {
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func (c *Context) FramebufferPixels(f Framebuffer, width, height int) ([]uint8, error) {
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gl := c.gl
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gl := c.gl
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gl.Flush()
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gl.Flush()
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lastFramebuffer = Framebuffer{nil}
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c.bindFramebuffer(f)
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gl.BindFramebuffer(gl.FRAMEBUFFER, f.Object)
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pixels := js.Global.Get("Uint8Array").New(4 * width * height)
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pixels := js.Global.Get("Uint8Array").New(4 * width * height)
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gl.ReadPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, pixels)
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gl.ReadPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, pixels)
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@ -175,8 +182,7 @@ func (c *Context) TexSubImage2D(p []uint8, width, height int) {
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func (c *Context) NewFramebuffer(t Texture) (Framebuffer, error) {
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func (c *Context) NewFramebuffer(t Texture) (Framebuffer, error) {
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gl := c.gl
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gl := c.gl
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f := gl.CreateFramebuffer()
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f := gl.CreateFramebuffer()
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lastFramebuffer = Framebuffer{nil}
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c.bindFramebuffer(Framebuffer{f})
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gl.BindFramebuffer(gl.FRAMEBUFFER, f)
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gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, t.Object, 0)
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gl.FramebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, t.Object, 0)
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if gl.CheckFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE {
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if gl.CheckFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE {
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@ -186,19 +192,18 @@ func (c *Context) NewFramebuffer(t Texture) (Framebuffer, error) {
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return Framebuffer{f}, nil
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return Framebuffer{f}, nil
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}
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}
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var lastBindedFramebuffer js.Object
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func (c *Context) SetViewport(f Framebuffer, width, height int) error {
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func (c *Context) SetViewport(f Framebuffer, width, height int) error {
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// TODO: Not sure if Flush is needed here.
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if f.Object == nil {
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c.bindFramebuffer(f)
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gl := c.gl
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gl.Viewport(0, 0, width, height)
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return nil
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}
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c.bindFramebuffer(f)
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gl := c.gl
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gl := c.gl
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// TODO: Fix this after the GopherJS bug was fixed (#159)
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if lastFramebuffer.Object != f.Object {
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gl.Flush()
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lastFramebuffer = f
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}
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if f.Object != nil {
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gl.BindFramebuffer(gl.FRAMEBUFFER, f.Object)
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} else {
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gl.BindFramebuffer(gl.FRAMEBUFFER, nil)
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}
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// gl.CheckFramebufferStatus might cause a performance problem. Don't call this here.
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gl.Viewport(0, 0, width, height)
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gl.Viewport(0, 0, width, height)
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return nil
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return nil
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}
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}
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@ -220,7 +225,6 @@ func (c *Context) NewShader(shaderType ShaderType, source string) (Shader, error
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gl := c.gl
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gl := c.gl
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s := gl.CreateShader(int(shaderType))
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s := gl.CreateShader(int(shaderType))
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if s == nil {
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if s == nil {
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println(gl.GetError())
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return Shader{nil}, errors.New("glCreateShader failed")
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return Shader{nil}, errors.New("glCreateShader failed")
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}
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}
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