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comparison pytouhou/ui/sdl/sprite.pyx @ 512:b39ad30c6620

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Add a pure SDL backend.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 05 Dec 2013 01:55:39 +0100
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children 3d4410de78e1
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511:2e8ceaa85d5c 512:b39ad30c6620
1 # -*- encoding: utf-8 -*-
2 ##
3 ## Copyright (C) 2011 Thibaut Girka <thib@sitedethib.com>
4 ##
5 ## This program is free software; you can redistribute it and/or modify
6 ## it under the terms of the GNU General Public License as published
7 ## by the Free Software Foundation; version 3 only.
8 ##
9 ## This program is distributed in the hope that it will be useful,
10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ## GNU General Public License for more details.
13 ##
14
15
16 from libc.math cimport M_PI as pi
17
18
19 cpdef object get_sprite_rendering_data(Sprite sprite):
20 cdef double x, y, tx, ty, tw, th, sx, sy, rz, tox, toy
21
22 if not sprite.changed:
23 return sprite._rendering_data
24
25 x = 0
26 y = 0
27
28 tx, ty, tw, th = sprite.texcoords
29 sx, sy = sprite.rescale
30 width = sprite.width_override or (tw * sx)
31 height = sprite.height_override or (th * sy)
32
33 rz = sprite.rotations_3d[2]
34 if sprite.automatic_orientation:
35 rz += pi/2. - sprite.angle
36 elif sprite.force_rotation:
37 rz += sprite.angle
38
39 if sprite.allow_dest_offset:
40 x += sprite.dest_offset[0]
41 y += sprite.dest_offset[1]
42 if not sprite.corner_relative_placement: # Reposition
43 x -= width / 2
44 y -= height / 2
45
46 size = sprite.anm.size
47 x_1 = 1 / <double>size[0]
48 y_1 = 1 / <double>size[1]
49 tox, toy = sprite.texoffsets
50 uvs = (tx * x_1 + tox,
51 (tx + tw) * x_1 + tox,
52 ty * y_1 + toy,
53 (ty + th) * y_1 + toy)
54
55 key = sprite.blendfunc
56 r, g, b = sprite.color
57 values = (x, y, width, height), uvs, (r, g, b, sprite.alpha), -rz * 180 / pi, sprite.mirrored
58 sprite._rendering_data = key, values
59 sprite.changed = False
60
61 return sprite._rendering_data