Exemple #1
0
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
}
Exemple #2
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func getGLTexture(img image.Image, smoothing TextureSmoothing) (t uint32, err error) {
	var (
		data   *bytes.Buffer
		bounds image.Rectangle
		width  int
		height int
	)
	if data, err = imageBytes(img); err != nil {
		return
	}
	bounds = img.Bounds()
	width = bounds.Max.X - bounds.Min.X
	height = bounds.Max.Y - bounds.Min.Y
	gl.GenTextures(1, &t)
	gl.BindTexture(gl.TEXTURE_2D, t)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, int32(smoothing))
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, int32(smoothing))
	gl.TexImage2D(
		gl.TEXTURE_2D,
		0,
		gl.RGBA,
		int32(width),
		int32(height),
		0,
		gl.RGBA,
		gl.UNSIGNED_INT_8_8_8_8,
		gl.Ptr(data.Bytes()),
	)
	gl.GenerateMipmap(gl.TEXTURE_2D)
	gl.BindTexture(gl.TEXTURE_2D, 0)
	return
}
Exemple #3
0
func newTexture(file string, texNum uint32) (uint32, error) {
	imgFile, err := os.Open(file)
	if err != nil {
		return 0, err
	}
	img, _, err := image.Decode(imgFile)

	rgba := image.NewRGBA(img.Bounds())
	if rgba.Stride != rgba.Rect.Size().X*4 {
		return 0, fmt.Errorf("unsupported stride")
	}
	draw.Draw(rgba, rgba.Bounds(), img, image.ZP, draw.Src)

	var texture uint32
	gl.GenTextures(1, &texture)
	gl.ActiveTexture(texNum)
	gl.BindTexture(gl.TEXTURE_2D, texture)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA,
		int32(rgba.Rect.Size().X), int32(rgba.Rect.Size().Y),
		0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Ptr(rgba.Pix))

	return texture, nil
}
Exemple #4
0
func createTexture(textureUnit uint32, rgba *image.RGBA) (uint32, error) {
	var texture uint32
	gl.GenTextures(1, &texture)
	gl.ActiveTexture(textureUnit)
	gl.BindTexture(gl.TEXTURE_2D, texture)

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)

	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, int32(rgba.Rect.Size().X), int32(rgba.Rect.Size().Y), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Ptr(rgba.Pix))

	return texture, nil
}
Exemple #5
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// Attempting to load a Texture from a given location on the disk.
func LoadTexture(path string) (Texture, error) {
	// Loading the image data.
	imgFile, err := os.Open(path)
	if err != nil {
		return 0, err
	}

	img, _, err := image.Decode(imgFile)
	if err != nil {
		return 0, err
	}

	rgba := image.NewRGBA(img.Bounds())
	if rgba.Stride != rgba.Rect.Size().X*4 {
		return 0, errors.New("Unsupported stride.")
	}
	draw.Draw(rgba, rgba.Bounds(), img, image.Point{0, 0}, draw.Src)

	// Generating and populating the texture.
	var texture uint32

	gl.GenTextures(1, &texture)
	gl.ActiveTexture(gl.TEXTURE0)
	gl.BindTexture(gl.TEXTURE_2D, texture)

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)

	gl.TexImage2D(
		gl.TEXTURE_2D,
		0,
		gl.RGBA,
		int32(rgba.Rect.Size().X),
		int32(rgba.Rect.Size().Y),
		0,
		gl.RGBA,
		gl.UNSIGNED_BYTE,
		gl.Ptr(rgba.Pix))

	return Texture(texture), nil
}
Exemple #6
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func GetGLTexture(img image.Image, smoothing TextureSmoothing) (t uint32, err error) {
	var (
		data   *bytes.Buffer
		bounds image.Rectangle
		width  int
		height int
	)
	if data, err = imageBytes(img); err != nil {
		return
	}
	bounds = img.Bounds()
	width = bounds.Max.X - bounds.Min.X
	height = bounds.Max.Y - bounds.Min.Y
	gl.GenTextures(1, &t)
	if e := gl.GetError(); e != 0 {
		fmt.Printf("ggt1 ERROR: %s\n", e)
	}
	gl.BindTexture(gl.TEXTURE_2D, t)
	if e := gl.GetError(); e != 0 {
		fmt.Printf("ggt2 ERROR: %s\n", e)
	}
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, int32(smoothing))
	if e := gl.GetError(); e != 0 {
		fmt.Printf("ggt3 ERROR: %s\n", e)
	}
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, int32(smoothing))
	if e := gl.GetError(); e != 0 {
		fmt.Printf("ggt4 ERROR: %s\n", e)
	}
	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, int32(width), int32(height), 0, gl.RGBA, gl.UNSIGNED_INT_8_8_8_8, gl.Ptr(data.Bytes()))
	if e := gl.GetError(); e != 0 {
		fmt.Printf("ggt5 ERROR: %s\n", e)
	}
	gl.GenerateMipmap(gl.TEXTURE_2D)
	if e := gl.GetError(); e != 0 {
		fmt.Printf("ggt6 ERROR: %s\n", e)
	}
	gl.BindTexture(gl.TEXTURE_2D, 0)
	if e := gl.GetError(); e != 0 {
		fmt.Printf("ggt7 ERROR: %s\n", e)
	}
	return
}
Exemple #7
0
func LoadImageToTexture(filePath string) (glTex uint32, e error) {
	gl.GenTextures(1, &glTex)
	gl.ActiveTexture(gl.TEXTURE0)
	gl.BindTexture(gl.TEXTURE_2D, glTex)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR_MIPMAP_LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)

	rgba_flipped, err := loadFile(filePath)
	if err != nil {
		return glTex, err
	}

	imageSize := int32(rgba_flipped.Bounds().Max.X)

	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, imageSize, imageSize, 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Ptr(rgba_flipped.Pix))
	gl.GenerateMipmap(gl.TEXTURE_2D)
	return glTex, nil
}
Exemple #8
0
func CreateTexture(file string) (Texture, error) {
	imgFile, err := os.Open(file)
	if err != nil {
		return Texture{}, err
	}
	img, _, err := image.Decode(imgFile)
	if err != nil {
		return Texture{}, err
	}

	rgba := image.NewRGBA(img.Bounds())
	if rgba.Stride != rgba.Rect.Size().X*4 {
		return Texture{}, fmt.Errorf("unsupported stride")
	}
	draw.Draw(rgba, rgba.Bounds(), img, image.Point{0, 0}, draw.Src)
	width, height := int32(rgba.Rect.Size().X), int32(rgba.Rect.Size().Y)
	var texture uint32

	gl.GenTextures(1, &texture)
	gl.ActiveTexture(gl.TEXTURE0)
	gl.BindTexture(gl.TEXTURE_2D, texture)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
	gl.TexImage2D(
		gl.TEXTURE_2D,
		0,
		gl.RGBA,
		width,
		height,
		0,
		gl.RGBA,
		gl.UNSIGNED_BYTE,
		gl.Ptr(rgba.Pix))

	return Texture{Id: texture, Width: width, Height: height}, nil
}
Exemple #9
0
func bindAggregateImage(img image.Image, idx int) uint32 {

	newIdx := idx

	if rgba, ok := img.(*image.RGBA); ok {

		gl.GenTextures(1, &textures[newIdx])

		gl.ActiveTexture(gl.TEXTURE0 + uint32(newIdx))
		gl.BindTexture(gl.TEXTURE_2D, textures[newIdx])
		gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
		gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
		gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
		gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
		gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_R, gl.CLAMP_TO_EDGE)

		gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, int32(rgba.Rect.Size().X), int32(rgba.Rect.Size().Y), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Ptr(rgba.Pix))
		gl.GenerateMipmap(gl.TEXTURE_2D)

		idxS := strconv.Itoa(newIdx)
		fmt.Println("idx: ", int32(newIdx), "myTextureSampler["+idxS+"]\x00")
		gl.Uniform1i(gl.GetUniformLocation(program, gl.Str("myTextureSampler["+idxS+"]\x00")), int32(newIdx))
		if ok := gl.GetError(); ok != gl.NO_ERROR {

			fmt.Println("1- Cannot load Image in location: ./: ", ok)
			os.Exit(-1)
		}

		return textures[newIdx]
	} else {
		fmt.Println("Image not RGBA at location: ./")
		os.Exit(-1)
	}

	return 0
}
Exemple #10
0
func MakeRandomTexture(textureSlot int) (Texture, error) {
	texture := NewTexture()
	texture.Bind(textureSlot)

	// gl.Enable(gl.TEXTURE_2D) // for some ATI drivers, for mipmap gen
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
	Check()

	var anisotropy float32
	gl.GetFloatv(MaxTextureMaxAnisotropyExt, &anisotropy)
	Check()
	gl.TexParameterf(gl.TEXTURE_2D, TextureMaxAnisotropyExt, anisotropy)
	Check()

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_BASE_LEVEL, 0)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAX_LEVEL, 0)
	Check()

	var pix [3 * 700 * 700]byte
	for i := 0; i < 3*700*700; i++ {
		pix[i] = byte(128 + i/16)
	}

	gl.TexImage2D(
		gl.TEXTURE_2D,
		0,
		gl.RGB,
		700,
		700,
		0,
		gl.RGB,
		gl.UNSIGNED_BYTE,
		gl.Ptr(&pix[0]))
	Check()

	return texture, nil
}
Exemple #11
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func (texture Texture) Load(textureSlot int, rgba *image.RGBA) {
	texture.Bind(textureSlot)

	// gl.Enable(gl.TEXTURE_2D) // for some ATI drivers, for mipmap gen
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
	Check()

	var anisotropy float32
	gl.GetFloatv(MaxTextureMaxAnisotropyExt, &anisotropy)
	Check()
	gl.TexParameterf(gl.TEXTURE_2D, TextureMaxAnisotropyExt, anisotropy)
	Check()

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_BASE_LEVEL, 0)
	Check()
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAX_LEVEL, 0)
	Check()

	gl.TexImage2D(
		gl.TEXTURE_2D,
		0,
		gl.RGBA,
		int32(rgba.Rect.Size().X),
		int32(rgba.Rect.Size().Y),
		0,
		gl.RGBA,
		gl.UNSIGNED_BYTE,
		gl.Ptr(rgba.Pix))
	Check()
}
Exemple #12
0
func loadFont(img *image.RGBA, config *FontConfig) (f *Font, err error) {
	f = new(Font)
	f.config = config

	// Resize image to next power-of-two.
	img = Pow2Image(img).(*image.RGBA)
	ib := img.Bounds()

	f.textureWidth = float32(ib.Dx())
	f.textureHeight = float32(ib.Dy())

	for _, glyph := range config.Glyphs {
		if glyph.Width > f.maxGlyphWidth {
			f.maxGlyphWidth = glyph.Width
		}
		if glyph.Height > f.maxGlyphHeight {
			f.maxGlyphHeight = glyph.Height
		}
	}

	// save to disk for testing
	if f.IsDebug {
		file, err := os.Create("out.png")
		if err != nil {
			panic(err)
		}
		defer file.Close()

		b := bufio.NewWriter(file)
		err = png.Encode(b, img)
		if err != nil {
			panic(err)
		}
		err = b.Flush()
		if err != nil {
			panic(err)
		}
	}

	// generate texture
	gl.GenTextures(1, &f.textureID)
	gl.BindTexture(gl.TEXTURE_2D, f.textureID)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	gl.TexImage2D(
		gl.TEXTURE_2D,
		0,
		gl.RGBA,
		int32(ib.Dx()),
		int32(ib.Dy()),
		0,
		gl.RGBA,
		gl.UNSIGNED_BYTE,
		gl.Ptr(img.Pix),
	)
	gl.BindTexture(gl.TEXTURE_2D, 0)

	// create shader program and define attributes and uniforms
	f.program, err = NewProgram(fontVertexShaderSource, fontFragmentShaderSource)
	if err != nil {
		return f, err
	}

	// attributes
	f.centeredPosition = uint32(gl.GetAttribLocation(f.program, gl.Str("centered_position\x00")))
	f.uv = uint32(gl.GetAttribLocation(f.program, gl.Str("uv\x00")))

	// uniforms
	f.finalPositionUniform = gl.GetUniformLocation(f.program, gl.Str("final_position\x00"))
	f.orthographicMatrixUniform = gl.GetUniformLocation(f.program, gl.Str("orthographic_matrix\x00"))
	f.scaleMatrixUniform = gl.GetUniformLocation(f.program, gl.Str("scale_matrix\x00"))
	f.fragmentTextureUniform = gl.GetUniformLocation(f.program, gl.Str("fragment_texture\x00"))
	f.colorUniform = gl.GetUniformLocation(f.program, gl.Str("fragment_color_adjustment\x00"))
	return f, nil
}