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annotate pytouhou/ui/opengl/backend.pyx @ 635:80687f258001

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Make sdl.Window inherit from gui.Window, so we can swap implementations.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 14 Apr 2016 21:18:03 +0100
parents a6af3ff86612
children 4fa0a8e7d941
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80687f258001 Make sdl.Window inherit from gui.Window, so we can swap implementations.
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1 cimport pytouhou.lib.gui as gui
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2 from pytouhou.lib.gui import Error as GUIError
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3 from .backend_sdl import create_sdl_window
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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_QUADS, GL_TRIANGLE_STRIP, GL_TRIANGLES)
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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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24 cdef str flavor
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25
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26 global profile, major, minor, double_buffer, is_legacy, GameRenderer
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27
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28 flavor = options['flavor']
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29 assert flavor in ('core', 'es', 'compatibility', 'legacy')
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30 profile = flavor
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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' or flavor == 'compatibility' and major < 2
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41 #TODO: check for framebuffer/renderbuffer support.
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42
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43 from pytouhou.ui.opengl.gamerenderer import GameRenderer
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45
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46 cdef bint discover_features() except True:
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47 '''Discover which features are supported by our context.'''
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48
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49 global use_debug_group, use_vao, use_primitive_restart, use_framebuffer_blit, use_pack_invert, use_scaled_rendering
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50 global primitive_mode
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51 global shader_header
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52 global is_legacy
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53
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54 version = epoxy_gl_version()
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55 is_desktop = epoxy_is_desktop_gl()
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56 is_legacy = is_legacy or (is_desktop and version < 20)
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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 use_scaled_rendering = not is_legacy #TODO: try to use the EXT framebuffer extension.
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64
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65 primitive_mode = (GL_QUADS if is_legacy else
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66 GL_TRIANGLE_STRIP if use_primitive_restart else
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67 GL_TRIANGLES)
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69 if not is_legacy:
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70 if is_desktop:
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71 # gl_FragColor isn’t supported anymore starting with GLSL 4.2.
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72 if version >= 42:
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73 version = 41
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74 try:
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75 glsl_version = {20: 110, 21: 120, 30: 130, 31: 140, 32: 150}[version]
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76 except KeyError:
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77 assert version >= 33
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78 glsl_version = version * 10
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79 shader_header = ('#version %d\n\n' % glsl_version).encode()
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80 else:
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81 # The attribute keyword isn’t supported past GLSL ES 3.0.
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82 if version >= 30:
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83 version = 20
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84 glsl_version = {20: '100', 30: '300 es'}[version]
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85 shader_header = ('#version %s\n\nprecision highp float;\n\n' % glsl_version).encode()
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86
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87
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88 def create_window(title, x, y, width, height, swap_interval):
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89 '''Create a window (using SDL) and an OpenGL context.'''
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90
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91 cdef gui.Window window
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92 window = create_sdl_window(title, x, y, width, height)
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93 window.create_gl_context()
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94 discover_features()
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95
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96 if use_debug_group:
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97 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "OpenGL initialisation")
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98
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99 # Initialize OpenGL
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100 glEnable(GL_BLEND)
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101 if is_legacy:
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102 glEnable(GL_TEXTURE_2D)
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103 glHint(GL_FOG_HINT, GL_NICEST)
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104 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
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105 glEnableClientState(GL_COLOR_ARRAY)
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106 glEnableClientState(GL_VERTEX_ARRAY)
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107 glEnableClientState(GL_TEXTURE_COORD_ARRAY)
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108
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109 if use_primitive_restart:
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110 glEnable(GL_PRIMITIVE_RESTART)
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111 glPrimitiveRestartIndex(0xFFFF);
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112
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113 if use_pack_invert:
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114 glPixelStorei(GL_PACK_INVERT_MESA, True)
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115
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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116 if use_debug_group:
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117 glPopDebugGroup()
553
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parents:
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118
589
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119 if swap_interval is not None:
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parents: 587
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120 try:
635
80687f258001 Make sdl.Window inherit from gui.Window, so we can swap implementations.
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parents: 617
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121 window.set_swap_interval(swap_interval)
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parents: 617
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122 except GUIError:
595
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parents: 593
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123 # The OpenGL context doesn’t support setting the swap interval,
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parents: 593
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124 # we’ll probably fallback to SDL_Delay-based clocking.
589
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parents: 587
diff changeset
125 pass
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parents: 587
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126
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127 return window