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annotate pytouhou/ui/opengl/background.pyx @ 791:a29122662cde

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utils: Simplify translate_2d and align Mat4 to 16 bytes This lowers the amount of instructions from 61 to 32 on PowerPC with AltiVec, and from 25 to 14 on amd64 with AVX2.
author Link Mauve <linkmauve@linkmauve.fr>
date Sat, 17 Jan 2026 14:19:58 +0100
parents a6af3ff86612
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 from libc.stdlib cimport malloc, free, realloc
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16
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17 from pytouhou.lib.opengl cimport \
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18 (glVertexPointer, glTexCoordPointer, glColorPointer,
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19 glVertexAttribPointer, glEnableVertexAttribArray, glBlendFunc,
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20 glBindTexture, glBindBuffer, glBufferData, GL_ARRAY_BUFFER,
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21 GL_STATIC_DRAW, GL_UNSIGNED_BYTE, GL_FLOAT, GL_SRC_ALPHA,
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22 GL_ONE_MINUS_SRC_ALPHA, GL_TEXTURE_2D, glGenBuffers, glEnable,
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23 glDisable, GL_DEPTH_TEST, glDrawElements, GL_UNSIGNED_SHORT,
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24 GL_ELEMENT_ARRAY_BUFFER, glDeleteBuffers, glGenVertexArrays,
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25 glDeleteVertexArrays, glBindVertexArray, glPushDebugGroup,
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26 GL_DEBUG_SOURCE_APPLICATION, glPopDebugGroup, glDrawArrays)
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27
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28 from .sprite cimport get_sprite_rendering_data
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29 from .backend cimport primitive_mode, is_legacy, use_debug_group, use_vao, use_primitive_restart
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30
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31
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32 cdef class BackgroundRenderer:
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33 def __dealloc__(self):
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34 if is_legacy:
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35 if self.vertex_buffer != NULL:
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36 free(self.vertex_buffer)
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37 else:
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38 glDeleteBuffers(1, &self.vbo)
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39 glDeleteBuffers(1, &self.ibo)
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40
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41 if use_vao:
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42 glDeleteVertexArrays(1, &self.vao)
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43
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44
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45 def __init__(self):
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46 if not is_legacy:
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47 if use_debug_group:
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48 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "Background creation")
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49
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50 glGenBuffers(1, &self.vbo)
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51 glGenBuffers(1, &self.ibo)
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52
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53 if use_vao:
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54 glGenVertexArrays(1, &self.vao)
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55 glBindVertexArray(self.vao)
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56 self.set_state()
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57 glBindVertexArray(0)
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58
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59 if use_debug_group:
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60 glPopDebugGroup()
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61
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62
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63 cdef void set_state(self) nogil:
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64 glBindBuffer(GL_ARRAY_BUFFER, self.vbo)
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65 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.ibo)
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66
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67 #TODO: find a way to use offsetof() instead of those ugly hardcoded values.
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68 glVertexAttribPointer(0, 3, GL_FLOAT, False, sizeof(Vertex), <void*>0)
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69 glEnableVertexAttribArray(0)
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70 glVertexAttribPointer(1, 2, GL_FLOAT, False, sizeof(Vertex), <void*>12)
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71 glEnableVertexAttribArray(1)
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72 glVertexAttribPointer(2, 4, GL_UNSIGNED_BYTE, True, sizeof(Vertex), <void*>20)
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73 glEnableVertexAttribArray(2)
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74
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75
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76 cdef void render_background(self) nogil:
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77 if use_debug_group:
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78 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "Background drawing")
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79
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80 if is_legacy:
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81 glVertexPointer(3, GL_FLOAT, sizeof(Vertex), &self.vertex_buffer[0].x)
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82 glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), &self.vertex_buffer[0].u)
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83 glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(Vertex), &self.vertex_buffer[0].r)
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84 else:
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85 if use_vao:
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86 glBindVertexArray(self.vao)
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87 else:
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88 self.set_state()
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89
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90 glEnable(GL_DEPTH_TEST)
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91 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
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92 glBindTexture(GL_TEXTURE_2D, self.texture)
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93 if is_legacy:
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94 glDrawArrays(primitive_mode, 0, self.nb_vertices)
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95 else:
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96 glDrawElements(primitive_mode, self.nb_indices, GL_UNSIGNED_SHORT, NULL)
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97 glDisable(GL_DEPTH_TEST)
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98
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99 if not is_legacy:
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100 if use_vao:
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101 glBindVertexArray(0)
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102 else:
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103 glBindBuffer(GL_ARRAY_BUFFER, 0)
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104 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
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105
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106 if use_debug_group:
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107 glPopDebugGroup()
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108
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109
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110 cdef bint load(self, background, GLuint[MAX_TEXTURES] textures) except True:
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111 cdef float ox, oy, oz, ox2, oy2, oz2
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112 cdef GLsizei nb_vertices = 0, nb_indices = 0
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113
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114 vertex_buffer = <Vertex*> malloc(65536 * sizeof(Vertex))
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115
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116 if not is_legacy:
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117 indices = <GLushort*> malloc(65536 * sizeof(GLushort))
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118
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119 for ox, oy, oz, model_id, model in background.object_instances:
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120 for ox2, oy2, oz2, width_override, height_override, sprite in model:
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121 #TODO: view frustum culling
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122 data = get_sprite_rendering_data(sprite)
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123 key = data.key
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124
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125 x1, x2, x3, x4, y1, y2, y3, y4, z1, z2, z3, z4 = data.pos[0], data.pos[1], data.pos[2], data.pos[3], data.pos[4], data.pos[5], data.pos[6], data.pos[7], data.pos[8], data.pos[9], data.pos[10], data.pos[11]
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126 r, g, b, a = data.color[0], data.color[1], data.color[2], data.color[3]
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127
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128 # Pack data
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129 vertex_buffer[nb_vertices] = Vertex(x1 + ox + ox2, y1 + oy + oy2, z1 + oz + oz2, data.left, data.bottom, r, g, b, a)
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130 vertex_buffer[nb_vertices+1] = Vertex(x2 + ox + ox2, y2 + oy + oy2, z2 + oz + oz2, data.right, data.bottom, r, g, b, a)
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131 vertex_buffer[nb_vertices+2] = Vertex(x3 + ox + ox2, y3 + oy + oy2, z3 + oz + oz2, data.right, data.top, r, g, b, a)
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132 vertex_buffer[nb_vertices+3] = Vertex(x4 + ox + ox2, y4 + oy + oy2, z4 + oz + oz2, data.left, data.top, r, g, b, a)
423
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133
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134 if not is_legacy:
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135 # Add indices
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136 if use_primitive_restart:
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137 indices[nb_indices] = nb_vertices
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138 indices[nb_indices+1] = nb_vertices + 1
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139 indices[nb_indices+2] = nb_vertices + 3
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140 indices[nb_indices+3] = nb_vertices + 2
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141 indices[nb_indices+4] = 0xFFFF
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142 else:
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143 indices[nb_indices] = nb_vertices
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144 indices[nb_indices+1] = nb_vertices + 1
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145 indices[nb_indices+2] = nb_vertices + 3
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146 indices[nb_indices+3] = nb_vertices + 1
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147 indices[nb_indices+4] = nb_vertices + 2
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148 indices[nb_indices+5] = nb_vertices + 3
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149
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150 nb_indices += 5 if use_primitive_restart else 6
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151
423
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152 nb_vertices += 4
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153
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154 self.texture = textures[key >> 1]
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155
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156 # We only need to keep the rendered vertices and indices in memory,
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157 # either in RAM or in VRAM, they will never change until we implement
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158 # background animation.
423
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159
560
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160 if is_legacy:
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161 self.vertex_buffer = <Vertex*> realloc(vertex_buffer, nb_vertices * sizeof(Vertex))
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162 self.nb_vertices = nb_vertices
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163 else:
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164 if use_debug_group:
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165 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "Background uploading")
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166
423
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167 glBindBuffer(GL_ARRAY_BUFFER, self.vbo)
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168 glBufferData(GL_ARRAY_BUFFER, nb_vertices * sizeof(Vertex), vertex_buffer, GL_STATIC_DRAW)
423
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169 glBindBuffer(GL_ARRAY_BUFFER, 0)
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170
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171 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.ibo)
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172 glBufferData(GL_ELEMENT_ARRAY_BUFFER, nb_indices * sizeof(GLushort), indices, GL_STATIC_DRAW)
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173 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
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174
611
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175 self.nb_indices = nb_indices
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176
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177 if use_debug_group:
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178 glPopDebugGroup()