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#!/usr/bin/env python
# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of pyglet nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------------
# $Id:$
'''Demonstrates one way of fixing the display resolution to a certain
size, but rendering to the full screen.
The method used in this example is:
1. Set the OpenGL viewport to the fixed resolution
2. Render the scene using any OpenGL functions (here, just a polygon)
3. Copy the framebuffer into a texture
4. Reset the OpenGL viewport to the window (full screen) size
5. Blit the texture to the framebuffer
Recent video cards could also render the scene directly to the texture
using EXT_framebuffer_object. (This is not demonstrated in this example).
'''
from pyglet.gl import *
import pyglet
class FixedResolution:
def __init__(self, window, width, height, filtered=False):
self.window = window
self.width = width
self.height = height
self._filtered = filtered
self._viewport = 0, 0, 0, 0, 0
self._calculate_viewport(self.window.width, self.window.height)
self._cam_x = 0
self._cam_y = 0
self.clear_color = 0, 0, 0, 1
self.texture = pyglet.image.Texture.create(width, height, rectangle=True)
if not filtered:
pyglet.image.Texture.default_min_filter = GL_NEAREST
pyglet.image.Texture.default_mag_filter = GL_NEAREST
glTexParameteri(self.texture.target, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameteri(self.texture.target, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
def on_resize(w, h):
self._calculate_viewport(w, h)
self.window_w, self.window_h = w, h
self.window.on_resize = on_resize
def _calculate_viewport(self, new_screen_width, new_screen_height):
aspect_ratio = self.width / self.height
aspect_width = new_screen_width
aspect_height = aspect_width / aspect_ratio + 0.5
if aspect_height > new_screen_height:
aspect_height = new_screen_height
aspect_width = aspect_height * aspect_ratio + 0.5
if not self._filtered:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
self._viewport = (int((new_screen_width / 2) - (aspect_width / 2)), # x
int((new_screen_height / 2) - (aspect_height / 2)), # y
0, # z
int(aspect_width), # width
int(aspect_height)) # height
def __enter__(self):
glViewport(0, 0, self.width, self.height)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
glOrtho(0, self.width, 0, self.height, -255, 255)
glMatrixMode(GL_MODELVIEW)
glTranslatef(self._cam_x, self._cam_y, 0)
def set_camera(self, x=0, y=0):
self._cam_x = -x
self._cam_y = -y
def __exit__(self, *unused):
win = self.window
buffer = pyglet.image.get_buffer_manager().get_color_buffer()
self.texture.blit_into(buffer, 0, 0, 0)
glViewport(0, 0, win.width, win.height)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
glOrtho(0, win.width, 0, win.height, -1, 1)
glMatrixMode(GL_MODELVIEW)
glClearColor(*self.clear_color)
glClear(GL_COLOR_BUFFER_BIT)
glLoadIdentity()
self.texture.blit(*self._viewport)
def begin(self):
self.__enter__()
def end(self):
self.__exit__()
###################################
# Simple program using the Viewport:
###################################
window = pyglet.window.Window(960, 540, resizable=True)
# Use 320x180 fixed resolution to make the effect completely obvious. You
# can change this to a more reasonable value such as 960x540 here:
target_width, target_height = 320, 180
# Create an instance of the FixedResolution class:
viewport = FixedResolution(window, target_width, target_height, filtered=False)
def update(dt):
global rectangle
rectangle.rotation += dt * 10
@window.event
def on_draw():
# The viewport can be used as
# a context manager:
with viewport:
window.clear()
rectangle.draw()
# # Alternatively, you can do it manually:
# viewport.begin()
# window.clear()
# rectangle.draw()
# viewport.end()
# Create a simple Rectangle to show the effect
rectangle = pyglet.shapes.Rectangle(x=target_width/2, y=target_height/2, color=(200, 0, 0), width=100, height=100)
rectangle.anchor_position = 50, 50
# Schedule the update function at 60fps
pyglet.clock.schedule_interval(update, 1/60)
pyglet.app.run()
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