1 /*

2 * libsoy - soy.widgets.Canvas

3 * Copyright (C) 2006,2007,2008,2009,2010 PySoy Group

4 *

5 * This program is free software; you can redistribute it and/or modify

6 * it under the terms of the GNU Affero General Public License as published

7 * by the Free Software Foundation, either version 3 of the License, or

8 * (at your option) any later version.

9 *

10 * This program is distributed in the hope that it will be useful,

11 * but WITHOUT ANY WARRANTY; without even the implied warranty of

12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

13 * GNU Affero General Public License for more details.

14 *

15 * You should have received a copy of the GNU Affero General Public License

16 * along with this program; if not, see http://www.gnu.org/licenses

17 *

18 */

19 [indent=2]

20 uses

21 GLib

22 Gdk

23 GL

24 soy.textures

25

26 //namespace soy.widgets

27

28 class soy.widgets.Canvas : soy.widgets.Widget

29

30 texture : soy.textures.Texture

31

32 verts : array of GLfloat = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f,\

33 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,\

34 1.0f, 1.0f, 0.0f, 1.0f, 1.0f,\

35 0.0f, 1.0f, 0.0f, 0.0f, 1.0f }

36

37 faces : array of GLushort = { 0,1,2,2,3,0 }

38

39 vbuffer : GLint // Vertex Buffer

40 ibuffer : GLint // Index Buffer

41

42 construct ( )

43 texture = new soy.textures.Texture()

44

45 def override render ( ) : void

46 //

47 ///////////////////////////////////////

48 //

49 // don't bother rendering w/o a texture

50 //

51

52 if texture == null

53 return

54

55 //

56 ///////////////////////////////////////

57 //

58 // Set the viewport to the current Widget position and size

59 //

60 //glViewport( (GL.GLint) Xpos, (GL.GLint) Ypos, (GL.GLint) width, (GL.GLint) height)

61 //

62 ///////////////////////////////////////

63 //

64 // Reset the projection and modelview matrix, set ortho rendering

65 //

66 glMatrixMode(GL_PROJECTION)

67 glLoadIdentity()

68 glOrtho(0.0, 1.0, 0.0, 1.0, -1, 1)

69 glMatrixMode(GL_MODELVIEW)

70 glLoadIdentity()

71

72 glDisableClientState(GL_NORMAL_ARRAY) // We're not going to use Normals

73

74 texture.enable()

75

76 glVertexPointer(3, GL_FLOAT, 20, verts)

77 glTexCoordPointer(2, GL_FLOAT, 20, verts+3)

78 glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, faces)

79

80 glEnableClientState(GL_NORMAL_ARRAY) // But remember to enable them for later...