/usr/share/games/fretsonfire/game/View.py is in fretsonfire-game 1.3.110.dfsg2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# -*- coding: iso-8859-1 -*- #
# #
# Frets on Fire #
# Copyright (C) 2006 Sami Kyöstilä #
# #
# This program is free software; you can redistribute it and/or #
# modify it under the terms of the GNU General Public License #
# as published by the Free Software Foundation; either version 2 #
# of the License, or (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the Free Software #
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, #
# MA 02110-1301, USA. #
#####################################################################
from __future__ import division
from OpenGL.GL import *
from OpenGL.GLU import *
import Log
from Task import Task
class Layer(Task):
def render(self, visibility, topMost):
pass
def shown(self):
pass
def hidden(self):
pass
def run(self, ticks):
pass
def isBackgroundLayer(self):
return False
class BackgroundLayer(Layer):
def isBackgroundLayer(self):
return True
class View(Task):
def __init__(self, engine, geometry = None):
Task.__init__(self)
self.layers = []
self.incoming = []
self.outgoing = []
self.visibility = {}
self.transitionTime = 512.0
self.geometry = geometry or glGetIntegerv(GL_VIEWPORT)
self.savedGeometry = None
self.engine = engine
w = self.geometry[2] - self.geometry[0]
h = self.geometry[3] - self.geometry[1]
self.aspectRatio = float(w) / float(h)
def pushLayer(self, layer):
Log.debug("View: Push: %s" % layer.__class__.__name__)
if not layer in self.layers:
self.layers.append(layer)
self.incoming.append(layer)
self.visibility[layer] = 0.0
layer.shown()
elif layer in self.outgoing:
layer.hidden()
layer.shown()
self.outgoing.remove(layer)
self.engine.addTask(layer)
def topLayer(self):
layers = list(self.layers)
layers.reverse()
for layer in layers:
if layer not in self.outgoing:
return layer
def popLayer(self, layer):
Log.debug("View: Pop: %s" % layer.__class__.__name__)
if layer in self.incoming:
self.incoming.remove(layer)
if layer in self.layers and not layer in self.outgoing:
self.outgoing.append(layer)
def popAllLayers(self):
Log.debug("View: Pop all")
[self.popLayer(l) for l in list(self.layers)]
def isTransitionInProgress(self):
return self.incoming or self.outgoing
def run(self, ticks):
if not self.layers:
return
topLayer = self.topLayer()
t = ticks / self.transitionTime
for layer in list(self.layers):
if not layer in self.visibility:
continue
if layer in self.outgoing or (layer is not topLayer and not layer.isBackgroundLayer()):
if self.visibility[layer] > 0.0:
self.visibility[layer] = max(0.0, self.visibility[layer] - t)
else:
self.visibility[layer] = 0.0
if layer in self.outgoing:
self.outgoing.remove(layer)
self.layers.remove(layer)
del self.visibility[layer]
self.engine.removeTask(layer)
layer.hidden()
if layer in self.incoming:
self.incoming.remove(layer)
elif layer in self.incoming or layer is topLayer:
if self.visibility[layer] < 1.0:
self.visibility[layer] = min(1.0, self.visibility[layer] + t)
else:
self.visibility[layer] = 1.0
if layer in self.incoming:
self.incoming.remove(layer)
def setOrthogonalProjection(self, normalize = True, yIsDown = True):
glMatrixMode(GL_PROJECTION)
glPushMatrix()
glLoadIdentity()
viewport = glGetIntegerv(GL_VIEWPORT)
if normalize:
w = int ( viewport[2] - viewport[0] )
h = int ( viewport[3] - viewport[1] )
# aspect ratio correction
h *= float((float(w) / float(h)) / (4.0 / 3.0))
viewport = [0, 0, 1, h / w]
if yIsDown:
glOrtho(viewport[0], viewport[2] - viewport[0],
viewport[3] - viewport[1], viewport[1], -100, 100);
else:
glOrtho(viewport[0], viewport[2] - viewport[0],
viewport[1], viewport[3] - viewport[1], -100, 100);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
def resetProjection(self):
glMatrixMode(GL_PROJECTION)
glPopMatrix()
glMatrixMode(GL_MODELVIEW)
glPopMatrix()
def setGeometry(self, geometry):
viewport = glGetIntegerv(GL_VIEWPORT)
w = viewport[2] - viewport[0]
h = viewport[3] - viewport[1]
s = (w, h, w, h)
geometry = tuple([(type(coord) == float) and int(s[i] * coord) or int(coord) for i, coord in enumerate(geometry)])
self.savedGeometry, self.geometry = viewport, geometry
glViewport(*geometry)
glScissor(*geometry)
def resetGeometry(self):
assert self.savedGeometry
self.savedGeometry, geometry = None, self.savedGeometry
self.geometry = geometry
glViewport(*geometry)
glScissor(*geometry)
def render(self):
#print [(str(m.__class__), v) for m, v in self.visibility.items()]
for layer in self.layers:
layer.render(self.visibility[layer], layer == self.layers[-1])
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