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annotate pytouhou/ui/opengl/backend.pyx @ 593:974decb8df4f

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Only selects between GL_TRIANGLE_STRIP and GL_TRIANGLES once, in the backend.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 16 Oct 2014 21:40:54 +0200
parents 19d930f9e3f0
children b7b4a234bf70
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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, glPixelStorei,
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12 GL_PACK_INVERT_MESA, GL_TRIANGLE_STRIP, GL_TRIANGLES)
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13
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14
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15 GameRenderer = None
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18 def init(options):
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19 '''
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20 Initialize the OpenGL module, and raise if something bad prevents it from
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21 working.
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22 '''
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23
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24 global profile, major, minor, double_buffer, is_legacy, GameRenderer
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25
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26 flavor = options['flavor']
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27 assert flavor in ('core', 'es', 'compatibility', 'legacy')
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28 profile = (sdl.GL_CONTEXT_PROFILE_CORE if flavor == 'core' else
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29 sdl.GL_CONTEXT_PROFILE_ES if flavor == 'es' else
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30 sdl.GL_CONTEXT_PROFILE_COMPATIBILITY)
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31
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32 version = str(options['version'])
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33 assert len(version) == 3 and version[1] == '.'
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34 major = int(version[0])
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35 minor = int(version[2])
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36
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37 maybe_double_buffer = options['double-buffer']
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38 double_buffer = maybe_double_buffer if maybe_double_buffer is not None else -1
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39
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40 is_legacy = flavor == 'legacy'
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41 is_gles = flavor == 'es'
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42
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43 #TODO: check for framebuffer/renderbuffer support.
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44
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45 from pytouhou.ui.opengl.gamerenderer import GameRenderer
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46
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47
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48 def discover_features():
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49 '''Discover which features are supported by our context.'''
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50
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51 global use_debug_group, use_vao, use_primitive_restart, use_pack_invert
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52 global primitive_mode
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53 global shader_header
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54
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55 version = epoxy_gl_version()
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56 is_desktop = epoxy_is_desktop_gl()
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57
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58 use_debug_group = (is_desktop and version >= 43) or epoxy_has_gl_extension('GL_KHR_debug')
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59 use_vao = (is_desktop and version >= 30) or epoxy_has_gl_extension('GL_ARB_vertex_array_object')
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60 use_primitive_restart = (is_desktop and version >= 31)
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61 use_framebuffer_blit = (is_desktop and version >= 30)
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62 use_pack_invert = epoxy_has_gl_extension('GL_MESA_pack_invert')
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63
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64 primitive_mode = GL_TRIANGLE_STRIP if use_primitive_restart else GL_TRIANGLES
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65
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66 if is_desktop:
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67 # gl_FragColor isn’t supported anymore starting with GLSL 4.2.
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68 if version >= 42:
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69 version = 41
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70 try:
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71 glsl_version = {20: 110, 21: 120, 30: 130, 31: 140, 32: 150}[version]
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72 except KeyError:
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73 assert version >= 33
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74 glsl_version = version * 10
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75 shader_header = ('#version %d\n\n' % glsl_version).encode()
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76 else:
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77 # The attribute keyword isn’t supported past GLSL ES 3.0.
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78 if version >= 30:
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79 version = 20
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80 glsl_version = {20: '100', 30: '300 es'}[version]
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81 shader_header = ('#version %s\n\nprecision highp float;\n\n' % glsl_version).encode()
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82
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83
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84 def create_window(title, x, y, width, height, swap_interval):
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85 '''Create a window (using SDL) and an OpenGL context.'''
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86
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87 sdl.gl_set_attribute(sdl.GL_CONTEXT_PROFILE_MASK, profile)
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88 sdl.gl_set_attribute(sdl.GL_CONTEXT_MAJOR_VERSION, major)
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89 sdl.gl_set_attribute(sdl.GL_CONTEXT_MINOR_VERSION, minor)
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90 sdl.gl_set_attribute(sdl.GL_DEPTH_SIZE, 24)
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91 if double_buffer >= 0:
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92 sdl.gl_set_attribute(sdl.GL_DOUBLEBUFFER, double_buffer)
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93
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94 flags = sdl.WINDOW_SHOWN | sdl.WINDOW_OPENGL
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95
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96 #TODO: legacy can support one of the framebuffer extensions.
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97 if not is_legacy:
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98 flags |= sdl.WINDOW_RESIZABLE
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99
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100 window = Window(title, x, y, width, height, flags)
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101 window.gl_create_context()
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102
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103 discover_features()
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104
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105 if use_debug_group:
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106 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "OpenGL initialisation")
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107
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108 # Initialize OpenGL
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109 glEnable(GL_BLEND)
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110 if is_legacy:
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111 glEnable(GL_TEXTURE_2D)
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112 glHint(GL_FOG_HINT, GL_NICEST)
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113 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
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parents:
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114 glEnableClientState(GL_COLOR_ARRAY)
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115 glEnableClientState(GL_VERTEX_ARRAY)
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116 glEnableClientState(GL_TEXTURE_COORD_ARRAY)
582
6e79756b7f42 Don’t call gl*DebugGroup if it isn’t exposed by the driver.
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parents: 579
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117
585
e0166cda75d5 Use primitive-restart to lower the size of our ibo, if supported.
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parents: 583
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118 if use_primitive_restart:
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parents: 583
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119 glEnable(GL_PRIMITIVE_RESTART)
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parents: 583
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120 glPrimitiveRestartIndex(0xFFFF);
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parents: 583
diff changeset
121
592
19d930f9e3f0 Add the screenshot feature, using P or Home like the original game.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 590
diff changeset
122 if use_pack_invert:
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parents: 590
diff changeset
123 glPixelStorei(GL_PACK_INVERT_MESA, True)
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parents: 590
diff changeset
124
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parents: 579
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125 if use_debug_group:
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parents: 579
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126 glPopDebugGroup()
553
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parents:
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127
589
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
128 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
129 try:
0768122da817 Add a frameskip option, and use swap interval to implement it.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
130 sdl.gl_set_swap_interval(swap_interval)
0768122da817 Add a frameskip option, and use swap interval to implement it.
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parents: 587
diff changeset
131 except sdl.SDLError:
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parents: 587
diff changeset
132 pass
0768122da817 Add a frameskip option, and use swap interval to implement it.
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parents: 587
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133
553
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134 return window