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annotate pytouhou/ui/opengl/backend.pyx @ 589:0768122da817

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Add a frameskip option, and use swap interval to implement it.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 10 Oct 2014 15:59:11 +0200
parents 6c9d8a3d853f
children e15672733c93
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rev   line source
589
0768122da817 Add a frameskip option, and use swap interval to implement it.
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1 from pytouhou.lib import sdl
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2 from pytouhou.lib cimport sdl
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3 from pytouhou.lib.sdl cimport Window
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4
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5 from pytouhou.lib.opengl cimport \
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6 (glEnable, glHint, glEnableClientState, GL_TEXTURE_2D, GL_BLEND,
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7 GL_PERSPECTIVE_CORRECTION_HINT, GL_FOG_HINT, GL_NICEST,
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8 GL_COLOR_ARRAY, GL_VERTEX_ARRAY, GL_TEXTURE_COORD_ARRAY,
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9 glPushDebugGroup, GL_DEBUG_SOURCE_APPLICATION, glPopDebugGroup,
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10 epoxy_gl_version, epoxy_is_desktop_gl, epoxy_has_gl_extension,
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11 GL_PRIMITIVE_RESTART, glPrimitiveRestartIndex)
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13
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14 GameRenderer = None
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16
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17 def init(options):
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18 '''
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19 Initialize the OpenGL module, and raise if something bad prevents it from
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20 working.
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21 '''
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22
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23 global profile, major, minor, double_buffer, is_legacy, GameRenderer
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24
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25 flavor = options['flavor']
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26 assert flavor in ('core', 'es', 'compatibility', 'legacy')
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27 profile = (sdl.GL_CONTEXT_PROFILE_CORE if flavor == 'core' else
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28 sdl.GL_CONTEXT_PROFILE_ES if flavor == 'es' else
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29 sdl.GL_CONTEXT_PROFILE_COMPATIBILITY)
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30
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31 version = str(options['version'])
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32 assert len(version) == 3 and version[1] == '.'
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33 major = int(version[0])
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34 minor = int(version[2])
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35
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36 maybe_double_buffer = options['double-buffer']
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37 double_buffer = maybe_double_buffer if maybe_double_buffer is not None else -1
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38
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39 is_legacy = flavor == 'legacy'
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40 is_gles = flavor == 'es'
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41
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42 #TODO: check for framebuffer/renderbuffer support.
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43
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44 from pytouhou.ui.opengl.gamerenderer import GameRenderer
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45
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46
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47 def discover_features():
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48 '''Discover which features are supported by our context.'''
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49
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50 global use_debug_group, use_vao, use_primitive_restart, shader_header
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51
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52 version = epoxy_gl_version()
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53 is_desktop = epoxy_is_desktop_gl()
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54
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55 use_debug_group = (is_desktop and version >= 43) or epoxy_has_gl_extension('GL_KHR_debug')
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56 use_vao = (is_desktop and version >= 30) or epoxy_has_gl_extension('GL_ARB_vertex_array_object')
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57 use_primitive_restart = (is_desktop and version >= 31)
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58 use_framebuffer_blit = (is_desktop and version >= 30)
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59
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60 if is_desktop:
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61 # gl_FragColor isn’t supported anymore starting with GLSL 4.2.
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62 if version >= 42:
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63 version = 41
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64 try:
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65 glsl_version = {20: 110, 21: 120, 30: 130, 31: 140, 32: 150}[version]
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66 except KeyError:
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67 assert version >= 33
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68 glsl_version = version * 10
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69 shader_header = '#version %d\n\n' % glsl_version
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70 else:
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71 # The attribute keyword isn’t supported past GLSL ES 3.0.
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72 if version >= 30:
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73 version = 20
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74 glsl_version = {20: '100', 30: '300 es'}[version]
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75 shader_header = '#version %s\n\nprecision highp float;\n\n' % glsl_version
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76
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77
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78 def create_window(title, x, y, width, height, swap_interval):
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79 '''Create a window (using SDL) and an OpenGL context.'''
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80
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81 sdl.gl_set_attribute(sdl.GL_CONTEXT_PROFILE_MASK, profile)
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82 sdl.gl_set_attribute(sdl.GL_CONTEXT_MAJOR_VERSION, major)
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83 sdl.gl_set_attribute(sdl.GL_CONTEXT_MINOR_VERSION, minor)
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84 sdl.gl_set_attribute(sdl.GL_DEPTH_SIZE, 24)
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85 if double_buffer >= 0:
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86 sdl.gl_set_attribute(sdl.GL_DOUBLEBUFFER, double_buffer)
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87
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88 flags = sdl.WINDOW_SHOWN | sdl.WINDOW_OPENGL
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89
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90 #TODO: legacy can support one of the framebuffer extensions.
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91 if not is_legacy:
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92 flags |= sdl.WINDOW_RESIZABLE
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93
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94 window = Window(title, x, y, width, height, flags)
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95 window.gl_create_context()
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96
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97 discover_features()
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98
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99 if use_debug_group:
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100 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "OpenGL initialisation")
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101
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102 # Initialize OpenGL
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103 glEnable(GL_BLEND)
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104 if is_legacy:
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105 glEnable(GL_TEXTURE_2D)
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106 glHint(GL_FOG_HINT, GL_NICEST)
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107 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
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108 glEnableClientState(GL_COLOR_ARRAY)
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109 glEnableClientState(GL_VERTEX_ARRAY)
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110 glEnableClientState(GL_TEXTURE_COORD_ARRAY)
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111
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112 if use_primitive_restart:
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113 glEnable(GL_PRIMITIVE_RESTART)
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114 glPrimitiveRestartIndex(0xFFFF);
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115
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6e79756b7f42 Don’t call gl*DebugGroup if it isn’t exposed by the driver.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 579
diff changeset
116 if use_debug_group:
6e79756b7f42 Don’t call gl*DebugGroup if it isn’t exposed by the driver.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 579
diff changeset
117 glPopDebugGroup()
553
8f51e34d911c Refactor graphics backend selection, to make them fallbackable and optional.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
118
589
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
119 if swap_interval is not None:
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
120 try:
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
121 sdl.gl_set_swap_interval(swap_interval)
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
122 except sdl.SDLError:
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
123 pass
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
124
553
8f51e34d911c Refactor graphics backend selection, to make them fallbackable and optional.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
125 return window