postprocessor in new file

renderer/postprocessor.go

@@ -0,0 +1,119 @@
+// Copyright 2016 The G3N Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package renderer implements the scene renderer.
+package renderer
+
+import "github.com/g3n/engine/gls"
+
+type Postprocessor struct {
+	Width    int32
+	Height   int32
+	Fbo      uint32
+	Tex      uint32
+	Vao      uint32
+	Prg      *gls.Program
+	screen   []float32
+	Renderer *Renderer
+}
+
+func (r *Renderer) CreatePostprocessor(width, height int32, vertexShaderSource, fragmentShaderSource string) *Postprocessor {
+	pp := &Postprocessor{
+		Width:    width,
+		Height:   height,
+		Renderer: r,
+		screen: []float32{
+			// xyz		color		texture coords
+			-1, 1, 0, 1, 1, 1, 0, 1,
+			-1, -1, 0, 1, 1, 1, 0, 0,
+			1, -1, 0, 1, 1, 1, 1, 0,
+			1, 1, 0, 1, 1, 1, 1, 1,
+			-1, 1, 0, 1, 1, 1, 0, 1,
+			1, -1, 0, 1, 1, 1, 1, 0,
+		},
+	}
+
+	pp.Fbo = r.gs.GenFramebuffer()
+	r.gs.BindFramebuffer(pp.Fbo)
+
+	// set up a texture to render into
+	pp.Tex = r.gs.GenTexture()
+	r.gs.BindTexture(gls.TEXTURE_2D, pp.Tex)
+	r.gs.TexImage2D(gls.TEXTURE_2D, 0, gls.RGB, width, height, gls.RGB, gls.UNSIGNED_BYTE, nil)
+	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_WRAP_S, gls.CLAMP_TO_EDGE)
+	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_WRAP_T, gls.CLAMP_TO_EDGE)
+	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_MIN_FILTER, gls.NEAREST)
+	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_MAG_FILTER, gls.NEAREST)
+	r.gs.BindTexture(gls.TEXTURE_2D, 0)
+	r.gs.FramebufferTexture2D(gls.COLOR_ATTACHMENT0, gls.TEXTURE_2D, pp.Tex)
+
+	// attach depth and stencil buffers
+	rbo := r.gs.GenRenderbuffer()
+	r.gs.BindRenderbuffer(rbo)
+	r.gs.RenderbufferStorage(gls.DEPTH24_STENCIL8, int(width), int(height))
+	r.gs.BindRenderbuffer(0)
+	r.gs.FramebufferRenderbuffer(gls.DEPTH_STENCIL_ATTACHMENT, rbo)
+
+	// check the framebuffer status
+	if r.gs.CheckFramebufferStatus() != gls.FRAMEBUFFER_COMPLETE {
+		log.Fatal("Can't create frame buffer")
+	}
+	r.gs.BindFramebuffer(0)
+
+	// create the "screen" quad
+	vbo := r.gs.GenBuffer()
+	r.gs.BindBuffer(gls.ARRAY_BUFFER, vbo)
+	r.gs.BufferData(gls.ARRAY_BUFFER, 4*len(pp.screen), pp.screen, gls.STATIC_DRAW)
+
+	pp.Vao = r.gs.GenVertexArray()
+	r.gs.BindVertexArray(pp.Vao)
+	r.gs.BindBuffer(gls.ARRAY_BUFFER, vbo)
+	var offset uint32
+
+	// position attribute
+	r.gs.VertexAttribPointer(0, 3, gls.FLOAT, false, 8*4, offset)
+	r.gs.EnableVertexAttribArray(0)
+	offset += 3 * 4
+
+	// color attribute
+	r.gs.VertexAttribPointer(1, 3, gls.FLOAT, false, 8*4, offset)
+	r.gs.EnableVertexAttribArray(1)
+	offset += 3 * 4
+
+	// texture coord attribute
+	r.gs.VertexAttribPointer(2, 2, gls.FLOAT, false, 8*4, offset)
+	r.gs.EnableVertexAttribArray(2)
+	offset += 2 * 4
+
+	// the screen shaders
+	pp.Prg = r.gs.NewProgram()
+	pp.Prg.AddShader(gls.VERTEX_SHADER, vertexShaderSource)
+	pp.Prg.AddShader(gls.FRAGMENT_SHADER, fragmentShaderSource)
+	err := pp.Prg.Build()
+	if err != nil {
+		log.Fatal("can't create shader: %e", err)
+	}
+
+	return pp
+}
+
+func (pp *Postprocessor) Render(fbwidth, fbheight int, render func()) {
+	// render into the low-res texture
+	gs := pp.Renderer.gs
+	gs.Viewport(0, 0, pp.Width, pp.Height)
+	gs.BindFramebuffer(pp.Fbo)
+	gs.Enable(gls.DEPTH_TEST)
+	render()
+
+	// show texture on screen
+	gs.Viewport(0, 0, int32(fbwidth), int32(fbheight))
+	gs.BindFramebuffer(0)
+	gs.ClearColor(1, 1, 1, 1)
+	gs.Clear(gls.COLOR_BUFFER_BIT)
+	gs.UseProgram(pp.Prg)
+	gs.Disable(gls.DEPTH_TEST)
+	gs.BindTexture(gls.TEXTURE_2D, pp.Tex)
+	gs.BindVertexArray(pp.Vao)
+	gs.DrawArrays(gls.TRIANGLES, 0, int32(len(pp.screen)/8))
+}

renderer/renderer.go

@@ -355,114 +355,3 @@ func (r *Renderer) renderGraphicMaterial(grmat *graphic.GraphicMaterial) error {
 
 	return nil
 }
-
-type Postprocessor struct {
-	Width    int32
-	Height   int32
-	Fbo      uint32
-	Tex      uint32
-	Vao      uint32
-	Prg      *gls.Program
-	screen   []float32
-	Renderer *Renderer
-}
-
-func (r *Renderer) CreatePostprocessor(width, height int32, vertexShaderSource, fragmentShaderSource string) *Postprocessor {
-	pp := &Postprocessor{
-		Width:    width,
-		Height:   height,
-		Renderer: r,
-		screen: []float32{
-			// xyz		color		texture coords
-			-1, 1, 0, 1, 1, 1, 0, 1,
-			-1, -1, 0, 1, 1, 1, 0, 0,
-			1, -1, 0, 1, 1, 1, 1, 0,
-			1, 1, 0, 1, 1, 1, 1, 1,
-			-1, 1, 0, 1, 1, 1, 0, 1,
-			1, -1, 0, 1, 1, 1, 1, 0,
-		},
-	}
-
-	pp.Fbo = r.gs.GenFramebuffer()
-	r.gs.BindFramebuffer(pp.Fbo)
-
-	// set up a texture to render into
-	pp.Tex = r.gs.GenTexture()
-	r.gs.BindTexture(gls.TEXTURE_2D, pp.Tex)
-	r.gs.TexImage2D(gls.TEXTURE_2D, 0, gls.RGB, width, height, gls.RGB, gls.UNSIGNED_BYTE, nil)
-	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_WRAP_S, gls.CLAMP_TO_EDGE)
-	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_WRAP_T, gls.CLAMP_TO_EDGE)
-	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_MIN_FILTER, gls.NEAREST)
-	r.gs.TexParameteri(gls.TEXTURE_2D, gls.TEXTURE_MAG_FILTER, gls.NEAREST)
-	r.gs.BindTexture(gls.TEXTURE_2D, 0)
-	r.gs.FramebufferTexture2D(gls.COLOR_ATTACHMENT0, gls.TEXTURE_2D, pp.Tex)
-
-	// attach depth and stencil buffers
-	rbo := r.gs.GenRenderbuffer()
-	r.gs.BindRenderbuffer(rbo)
-	r.gs.RenderbufferStorage(gls.DEPTH24_STENCIL8, int(width), int(height))
-	r.gs.BindRenderbuffer(0)
-	r.gs.FramebufferRenderbuffer(gls.DEPTH_STENCIL_ATTACHMENT, rbo)
-
-	// check the framebuffer status
-	if r.gs.CheckFramebufferStatus() != gls.FRAMEBUFFER_COMPLETE {
-		log.Fatal("Can't create frame buffer")
-	}
-	r.gs.BindFramebuffer(0)
-
-	// create the "screen" quad
-	vbo := r.gs.GenBuffer()
-	r.gs.BindBuffer(gls.ARRAY_BUFFER, vbo)
-	r.gs.BufferData(gls.ARRAY_BUFFER, 4*len(pp.screen), pp.screen, gls.STATIC_DRAW)
-
-	pp.Vao = r.gs.GenVertexArray()
-	r.gs.BindVertexArray(pp.Vao)
-	r.gs.BindBuffer(gls.ARRAY_BUFFER, vbo)
-	var offset uint32
-
-	// position attribute
-	r.gs.VertexAttribPointer(0, 3, gls.FLOAT, false, 8*4, offset)
-	r.gs.EnableVertexAttribArray(0)
-	offset += 3 * 4
-
-	// color attribute
-	r.gs.VertexAttribPointer(1, 3, gls.FLOAT, false, 8*4, offset)
-	r.gs.EnableVertexAttribArray(1)
-	offset += 3 * 4
-
-	// texture coord attribute
-	r.gs.VertexAttribPointer(2, 2, gls.FLOAT, false, 8*4, offset)
-	r.gs.EnableVertexAttribArray(2)
-	offset += 2 * 4
-
-	// the screen shaders
-	pp.Prg = r.gs.NewProgram()
-	pp.Prg.AddShader(gls.VERTEX_SHADER, vertexShaderSource)
-	pp.Prg.AddShader(gls.FRAGMENT_SHADER, fragmentShaderSource)
-	err := pp.Prg.Build()
-	if err != nil {
-		log.Fatal("can't create shader: %e", err)
-	}
-
-	return pp
-}
-
-func (pp *Postprocessor) Render(fbwidth, fbheight int, render func()) {
-	// render into the low-res texture
-	gs := pp.Renderer.gs
-	gs.Viewport(0, 0, pp.Width, pp.Height)
-	gs.BindFramebuffer(pp.Fbo)
-	gs.Enable(gls.DEPTH_TEST)
-	render()
-
-	// show texture on screen
-	gs.Viewport(0, 0, int32(fbwidth), int32(fbheight))
-	gs.BindFramebuffer(0)
-	gs.ClearColor(1, 1, 1, 1)
-	gs.Clear(gls.COLOR_BUFFER_BIT)
-	gs.UseProgram(pp.Prg)
-	gs.Disable(gls.DEPTH_TEST)
-	gs.BindTexture(gls.TEXTURE_2D, pp.Tex)
-	gs.BindVertexArray(pp.Vao)
-	gs.DrawArrays(gls.TRIANGLES, 0, int32(len(pp.screen)/8))
-}