# Integration with other Libraries

## Pyglet & ImageSurface as Texture

Creating a pyglet.Texture from an ImageSurface:

      import ctypes
      import cairo

      from pyglet import app, clock, gl, image, window

      # create data shared by ImageSurface and Texture
      width, height = 400, 400

      surface_data = (ctypes.c_ubyte * (width * height * 4))()
      surface = cairo.ImageSurface.create_for_data (surface_data, cairo.FORMAT_ARGB32,
      width, height, width * 4);
      texture = image.Texture.create_for_size(gl.GL_TEXTURE_2D, width, height, gl.GL_RGBA)

Draw pyglet.Texture bound to ImageSurface

      window = window.Window(width=width, height=height)

      @window.event
      def on_draw():
          window.clear()

          # Draw texture backed by ImageSurface
          gl.glEnable(gl.GL_TEXTURE_2D)

          gl.glBindTexture(gl.GL_TEXTURE_2D, texture.id)
          gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RGBA, width, height, 0, gl.GL_BGRA,
          gl.GL_UNSIGNED_BYTE,
          surface_data)

          gl.glBegin(gl.GL_QUADS)
          gl.glTexCoord2f(0.0, 1.0)
          gl.glVertex2i(0, 0)
          gl.glTexCoord2f(1.0, 1.0)
          gl.glVertex2i(width, 0)
          gl.glTexCoord2f(1.0, 0.0)
          gl.glVertex2i(width, height)
          gl.glTexCoord2f(0.0, 0.0)
          gl.glVertex2i(0, height)
          gl.glEnd()

      # call clock.schedule_update here to update the ImageSurface every frame
      app.run()

## Freetype-py & Cairo

See https://github.com/rougier/freetype-py/tree/master/examples for examples. Most of the `*-cairo.py` examples illustrate conversion from FreeType bitmaps to Cairo surfaces; the two examples, `glyph-vector-cairo.py` and `glyph-vector-2-cairo.py`, illustrate conversion from FreeType glyph contours to Cairo paths.

## ModernGL & ImageSurface as Texture

Creating a moderngl.Texture from an ImageSurface:

      import moderngl
      import cairo
      ctx = moderngl.create_context(standalone=True)
      width, height = 400, 400
      surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
      texture = ctx.texture((width, height), 4, data=surface.get_data())

An example can also be found in the ModernGL project: https://github.com/moderngl/moderngl/blob/master/examples/integration_pycairo.py