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annotate pytouhou/ui/opengl/backend.pyx @ 553:8f51e34d911c

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Refactor graphics backend selection, to make them fallbackable and optional.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 29 May 2014 12:31:55 +0200
parents
children 653a9f087673
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553
8f51e34d911c Refactor graphics backend selection, to make them fallbackable and optional.
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1 from pytouhou.lib cimport sdl
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2 from pytouhou.lib.sdl cimport Window
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3
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4 from pytouhou.lib.opengl cimport \
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5 (glEnable, glHint, glEnableClientState, GL_TEXTURE_2D, GL_BLEND,
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6 GL_PERSPECTIVE_CORRECTION_HINT, GL_FOG_HINT, GL_NICEST,
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7 GL_COLOR_ARRAY, GL_VERTEX_ARRAY, GL_TEXTURE_COORD_ARRAY)
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8
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9 IF USE_GLEW:
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10 from pytouhou.lib.opengl cimport glewInit
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11
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12
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13 GameRenderer = None
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14
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15
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16 def init(options):
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17 global flavor, version, major, minor, double_buffer, is_legacy, GameRenderer
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18
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19 flavor = options['flavor']
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20 assert flavor in ('core', 'es', 'compatibility', 'legacy')
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21
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22 version = options['version']
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23 major = int(version)
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24 minor = <int>(version * 10) % 10
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25
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26 double_buffer = options['double-buffer']
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27 is_legacy = flavor == 'legacy'
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28
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29 #TODO: check for framebuffer/renderbuffer support.
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30
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31 from pytouhou.ui.opengl.gamerenderer import GameRenderer
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32
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33
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34 def create_window(title, x, y, width, height):
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35 sdl.gl_set_attribute(sdl.GL_CONTEXT_MAJOR_VERSION, major)
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36 sdl.gl_set_attribute(sdl.GL_CONTEXT_MINOR_VERSION, minor)
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37 sdl.gl_set_attribute(sdl.GL_DOUBLEBUFFER, double_buffer)
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38 sdl.gl_set_attribute(sdl.GL_DEPTH_SIZE, 24)
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39
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40 flags = sdl.WINDOW_SHOWN | sdl.WINDOW_OPENGL
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41
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42 #TODO: legacy can support one of the framebuffer extensions.
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43 if not is_legacy:
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44 flags |= sdl.WINDOW_RESIZABLE
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45
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46 window = Window(title, x, y, width, height, flags)
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47 window.gl_create_context()
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48
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49 if USE_GLEW:
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50 if glewInit() != 0:
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51 raise Exception('GLEW init fail!')
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52
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53 # Initialize OpenGL
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54 glEnable(GL_BLEND)
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55 if is_legacy:
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56 glEnable(GL_TEXTURE_2D)
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57 glHint(GL_FOG_HINT, GL_NICEST)
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58 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
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59 glEnableClientState(GL_COLOR_ARRAY)
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60 glEnableClientState(GL_VERTEX_ARRAY)
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61 glEnableClientState(GL_TEXTURE_COORD_ARRAY)
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62
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63 return window