func (r *EffectsRenderer) initFramebuffer(w, h int) (fb uint32, tex uint32, err error) {
gl.GenFramebuffers(1, &fb)
gl.BindFramebuffer(gl.FRAMEBUFFER, fb)
gl.GenTextures(1, &tex)
gl.BindTexture(gl.TEXTURE_2D, tex)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, int32(w), int32(h), 0, gl.RGBA, gl.UNSIGNED_BYTE, nil)
gl.FramebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0)
if err = r.GetError(); err != nil {
return
}
buffers := []uint32{gl.COLOR_ATTACHMENT0}
gl.DrawBuffers(1, &buffers[0])
var rb uint32
gl.GenRenderbuffers(1, &rb)
gl.BindRenderbuffer(gl.RENDERBUFFER, rb)
gl.RenderbufferStorage(gl.RENDERBUFFER, gl.STENCIL_INDEX8, int32(w), int32(h))
gl.FramebufferRenderbuffer(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, rb)
gl.BindTexture(gl.TEXTURE_2D, 0)
gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
gl.BindRenderbuffer(gl.RENDERBUFFER, 0)
return
}
func (r *EffectsRenderer) Delete() error {
gl.BindTexture(gl.TEXTURE_2D, 0)
gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
gl.BindRenderbuffer(gl.RENDERBUFFER, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.DeleteFramebuffers(1, &r.framebuffer)
gl.DeleteTextures(1, &r.texture)
gl.DeleteBuffers(1, &r.coords)
return r.GetError()
}
func (r *GlowRenderer) Delete() error {
gl.BindTexture(gl.TEXTURE_2D, 0)
gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
gl.BindRenderbuffer(gl.RENDERBUFFER, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.DeleteFramebuffers(1, &r.GlowFb)
gl.DeleteTextures(1, &r.GlowTex)
gl.DeleteFramebuffers(1, &r.BlurFb)
gl.DeleteTextures(1, &r.BlurTex)
gl.DeleteBuffers(1, &r.coords)
return r.GetError()
}