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annotate pytouhou/ui/window.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 aad758aef26d
children 00f228b57840
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2013 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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4 ##
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5 ## This program is free software; you can redistribute it and/or modify
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6 ## it under the terms of the GNU General Public License as published
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7 ## by the Free Software Foundation; version 3 only.
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8 ##
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9 ## This program is distributed in the hope that it will be useful,
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10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ## GNU General Public License for more details.
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13 ##
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14
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15 cimport cython
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16
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18 cdef class Clock:
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19 def __init__(self, long fps=-1):
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20 self._target_fps = 0
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21 self._ref_tick = 0
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22 self._ref_frame = 0
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23 self._fps_tick = 0
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24 self._fps_frame = 0
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25 self.fps = 0
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26 self.set_target_fps(fps)
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27
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28
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29 cdef void set_target_fps(self, long fps) nogil:
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30 self._target_fps = fps
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31 self._ref_tick = 0
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32 self._fps_tick = 0
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33
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34
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35 @cython.cdivision(True)
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36 cdef void tick(self) nogil except *:
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37 current = sdl.get_ticks()
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38
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39 if not self._ref_tick:
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40 self._ref_tick = current
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41 self._ref_frame = 0
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42
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43 if self._fps_frame >= (self._target_fps if self._target_fps > 0 else 60):
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44 self.fps = self._fps_frame * 1000. / (current - self._fps_tick)
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45 self._fps_tick = current
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46 self._fps_frame = 0
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47 # If we are relying on vsync, but vsync doesn't work or is higher
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48 # than 60 fps, limit ourselves to 60 fps.
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49 if self._target_fps < 0 and self.fps > 64.:
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50 self._target_fps = 60
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51
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52 self._ref_frame += 1
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53 self._fps_frame += 1
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54
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55 target_tick = self._ref_tick
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56 if self._target_fps > 0:
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57 target_tick += <unsigned long>(self._ref_frame * 1000 / self._target_fps)
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58
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59 if current <= target_tick:
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60 sdl.delay(target_tick - current)
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61 else:
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62 self._ref_tick = current
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63 self._ref_frame = 0
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64
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65
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66
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67 cdef class Runner:
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68 cdef void start(self) except *:
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69 pass
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70
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71 cdef void finish(self) except *:
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72 pass
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73
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74 cdef bint update(self) except *:
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75 return False
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76
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77
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78
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79 cdef class Window:
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80 def __init__(self, backend, long fps_limit=-1):
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81 self.runner = None
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82
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83 if backend is not None:
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84 self.win = backend.create_window(
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85 'PyTouhou',
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86 sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED,
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87 640, 480) #XXX
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88
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89 self.clock = Clock(fps_limit)
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90
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91
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92 cdef void set_size(self, int width, int height) nogil:
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93 self.win.set_window_size(width, height)
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94
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95
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96 cpdef set_runner(self, Runner runner=None):
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97 self.runner = runner
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98 if runner is not None:
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99 runner.start()
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100
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101
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102 cpdef run(self):
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103 try:
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104 while self.run_frame():
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105 pass
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106 finally:
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107 self.runner.finish()
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108
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109
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110 cdef bint run_frame(self) except? False:
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111 cdef bint running = False
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112 if self.runner is not None:
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113 running = self.runner.update()
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114 if self.win is not None:
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115 self.win.present()
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116 self.clock.tick()
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117 return running
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118
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119
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120 cdef double get_fps(self) nogil:
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121 return self.clock.fps