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annotate pytouhou/ui/opengl/backend.pyx @ 559:1be60813f7cb

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Get OpenGL ES 2.0 to work thanks to libepoxy. PCB textures will need swizzle in the shaders since BGRA isn’t natively supported on GLES.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 30 May 2014 16:40:36 +0200
parents 94725968dabb
children b8df946d394d
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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
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10 GameRenderer = None
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11
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12
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13 def init(options):
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14 global flavor, version, major, minor, double_buffer, is_legacy, use_vao, shader_header, GameRenderer
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15
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16 flavor_name = options['flavor']
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17 assert flavor_name in ('core', 'es', 'compatibility', 'legacy')
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18 flavor = (sdl.GL_CONTEXT_PROFILE_CORE if flavor_name == 'core' else
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19 sdl.GL_CONTEXT_PROFILE_ES if flavor_name == 'es' else
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20 sdl.GL_CONTEXT_PROFILE_COMPATIBILITY)
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21
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22 version = str(options['version'])
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23 assert len(version) == 3 and version[1] == '.'
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24 major = int(version[0])
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25 minor = int(version[2])
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26
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27 maybe_double_buffer = options['double-buffer']
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28 double_buffer = maybe_double_buffer if maybe_double_buffer is not None else -1
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29 use_vao = (major == 3 and minor >= 1) or major > 3
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30
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31 is_legacy = flavor_name == 'legacy'
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32 is_gles = flavor_name == 'es'
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33
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34 if not is_gles:
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35 try:
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36 glsl_version = {'2.0': 110, '2.1': 120, '3.0': 130, '3.1': 140, '3.2': 150}[version]
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37 except KeyError:
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38 assert (major == 3 and minor == 3) or major > 3
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39 glsl_version = 100 * major + 10 * minor
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40 shader_header = '#version %d\n' % glsl_version
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41 else:
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42 glsl_version = {'2.0': 100, '3.0': 300}[version]
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43 shader_header = '#version %d\n\nprecision highp float;\n' % glsl_version
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44
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45 #TODO: check for framebuffer/renderbuffer support.
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46
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47 from pytouhou.ui.opengl.gamerenderer import GameRenderer
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48
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49
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50 def create_window(title, x, y, width, height):
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51 sdl.gl_set_attribute(sdl.GL_CONTEXT_PROFILE_MASK, flavor)
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52 sdl.gl_set_attribute(sdl.GL_CONTEXT_MAJOR_VERSION, major)
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53 sdl.gl_set_attribute(sdl.GL_CONTEXT_MINOR_VERSION, minor)
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54 sdl.gl_set_attribute(sdl.GL_DEPTH_SIZE, 24)
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55 if double_buffer >= 0:
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56 sdl.gl_set_attribute(sdl.GL_DOUBLEBUFFER, double_buffer)
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57
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58 flags = sdl.WINDOW_SHOWN | sdl.WINDOW_OPENGL
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59
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60 #TODO: legacy can support one of the framebuffer extensions.
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61 if not is_legacy:
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62 flags |= sdl.WINDOW_RESIZABLE
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63
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64 window = Window(title, x, y, width, height, flags)
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65 window.gl_create_context()
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66
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67 # Initialize OpenGL
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68 glEnable(GL_BLEND)
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69 if is_legacy:
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70 glEnable(GL_TEXTURE_2D)
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71 glHint(GL_FOG_HINT, GL_NICEST)
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72 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
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73 glEnableClientState(GL_COLOR_ARRAY)
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74 glEnableClientState(GL_VERTEX_ARRAY)
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75 glEnableClientState(GL_TEXTURE_COORD_ARRAY)
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76
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77 return window