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comparison pytouhou/ui/background.pyx @ 423:d8630c086926

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Replace Pyglet with our own Cython OpenGL wrapper.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Tue, 16 Jul 2013 21:07:15 +0200
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children 5d7bb2fd74f7
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422:52829ebe2561 423:d8630c086926
1 # -*- encoding: utf-8 -*-
2 ##
3 ## Copyright (C) 2013 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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 from libc.stdlib cimport malloc, free, realloc
16
17 from pytouhou.lib.opengl cimport \
18 (glVertexPointer, glTexCoordPointer, glColorPointer,
19 glVertexAttribPointer, glEnableVertexAttribArray, glBlendFunc,
20 glBindTexture, glBindBuffer, glBufferData, GL_ARRAY_BUFFER,
21 GL_STATIC_DRAW, GL_UNSIGNED_BYTE, GL_FLOAT, GL_SRC_ALPHA,
22 GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_TEXTURE_2D, glGenBuffers,
23 glEnable, glDisable, GL_DEPTH_TEST, glDrawArrays, GL_QUADS)
24
25 from .sprite cimport get_sprite_rendering_data
26
27
28 cdef class BackgroundRenderer:
29 def __cinit__(self):
30 # Allocate buffers
31 self.vertex_buffer = <Vertex*> malloc(65536 * sizeof(Vertex))
32
33
34 def __dealloc__(self):
35 free(self.vertex_buffer)
36
37
38 def __init__(self, texture_manager, use_fixed_pipeline):
39 self.texture_manager = texture_manager
40 self.use_fixed_pipeline = use_fixed_pipeline
41
42 if not use_fixed_pipeline:
43 glGenBuffers(1, &self.vbo)
44
45
46 cpdef render_background(self):
47 if self.use_fixed_pipeline:
48 glVertexPointer(3, GL_FLOAT, sizeof(Vertex), &self.vertex_buffer[0].x)
49 glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), &self.vertex_buffer[0].u)
50 glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(Vertex), &self.vertex_buffer[0].r)
51 else:
52 glBindBuffer(GL_ARRAY_BUFFER, self.vbo)
53
54 #TODO: find a way to use offsetof() instead of those ugly hardcoded values.
55 glVertexAttribPointer(0, 3, GL_FLOAT, False, sizeof(Vertex), <void*>0)
56 glEnableVertexAttribArray(0)
57 glVertexAttribPointer(1, 2, GL_FLOAT, False, sizeof(Vertex), <void*>12)
58 glEnableVertexAttribArray(1)
59 glVertexAttribPointer(2, 4, GL_UNSIGNED_BYTE, True, sizeof(Vertex), <void*>20)
60 glEnableVertexAttribArray(2)
61
62 glEnable(GL_DEPTH_TEST)
63 glBlendFunc(GL_SRC_ALPHA, (GL_ONE_MINUS_SRC_ALPHA, GL_ONE)[self.blendfunc])
64 glBindTexture(GL_TEXTURE_2D, self.texture_manager[self.texture_key])
65 glDrawArrays(GL_QUADS, 0, self.nb_vertices)
66 glDisable(GL_DEPTH_TEST)
67
68 if not self.use_fixed_pipeline:
69 glBindBuffer(GL_ARRAY_BUFFER, 0)
70
71
72 cpdef prerender(self, background):
73 cdef float ox, oy, oz, ox2, oy2, oz2
74 cdef unsigned short nb_vertices = 0
75 cdef Vertex* vertex_buffer
76
77 vertex_buffer = self.vertex_buffer
78
79 for ox, oy, oz, model_id, model in background.object_instances:
80 for ox2, oy2, oz2, width_override, height_override, sprite in model:
81 #TODO: view frustum culling
82 key, (vertices, uvs, colors) = get_sprite_rendering_data(sprite)
83 (x1, y1, z1), (x2, y2, z2), (x3, y3, z3), (x4, y4, z4) = vertices
84 left, right, bottom, top = uvs
85 r, g, b, a = colors
86
87 vertex_buffer[nb_vertices] = Vertex(x1 + ox + ox2, y1 + oy + oy2, z1 + oz + oz2, left, bottom, r, g, b, a)
88 vertex_buffer[nb_vertices+1] = Vertex(x2 + ox + ox2, y2 + oy + oy2, z2 + oz + oz2, right, bottom, r, g, b, a)
89 vertex_buffer[nb_vertices+2] = Vertex(x3 + ox + ox2, y3 + oy + oy2, z3 + oz + oz2, right, top, r, g, b, a)
90 vertex_buffer[nb_vertices+3] = Vertex(x4 + ox + ox2, y4 + oy + oy2, z4 + oz + oz2, left, top, r, g, b, a)
91
92 nb_vertices += 4
93
94 self.texture_key, self.blendfunc = key
95 self.nb_vertices = nb_vertices
96 self.vertex_buffer = <Vertex*> realloc(vertex_buffer, nb_vertices * sizeof(Vertex))
97
98 if not self.use_fixed_pipeline:
99 glBindBuffer(GL_ARRAY_BUFFER, self.vbo)
100 glBufferData(GL_ARRAY_BUFFER, nb_vertices * sizeof(Vertex), &self.vertex_buffer[0], GL_STATIC_DRAW)
101 glBindBuffer(GL_ARRAY_BUFFER, 0)