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annotate pytouhou/ui/opengl/framebuffer.pyx @ 756:4d91790cf8ab

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Fix dump_ecl example.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Tue, 05 Jan 2021 01:14:52 +0100
parents a6af3ff86612
children
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586
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2014 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 free
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16
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17 from pytouhou.lib.opengl cimport \
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18 (glPushDebugGroup, glPopDebugGroup, GL_DEBUG_SOURCE_APPLICATION,
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19 glGenTextures, glDeleteTextures, glBindTexture, glTexParameteri,
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20 glTexImage2D, GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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21 GL_TEXTURE_MAG_FILTER, GL_LINEAR, GL_RGBA, GL_UNSIGNED_BYTE,
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22 glGenRenderbuffers, glDeleteRenderbuffers, glBindRenderbuffer,
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23 glRenderbufferStorage, GL_RENDERBUFFER, GL_DEPTH_COMPONENT16,
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24 glGenFramebuffers, glDeleteFramebuffers, glBindFramebuffer,
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25 glFramebufferTexture2D, glFramebufferRenderbuffer,
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26 glCheckFramebufferStatus, GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
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27 GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_COMPLETE, glGenBuffers,
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28 glDeleteBuffers, glBindBuffer, glBufferData, GL_ARRAY_BUFFER,
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29 GL_STATIC_DRAW, glGenVertexArrays, glDeleteVertexArrays,
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30 glBindVertexArray, glVertexAttribPointer, GL_SHORT, GL_FLOAT,
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31 glEnableVertexAttribArray, glDrawArrays, GL_TRIANGLE_STRIP,
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32 glBlitFramebuffer, GL_READ_FRAMEBUFFER, glClear, GL_COLOR_BUFFER_BIT,
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33 GL_DEPTH_BUFFER_BIT, glViewport, glBlendFunc, GL_ONE, GL_ZERO)
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34
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35 from pytouhou.utils.maths cimport ortho_2d
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36
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37 from .shaders.eosd import PassthroughShader
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38 from .backend cimport use_debug_group, use_vao, use_framebuffer_blit
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39
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40 cdef class Framebuffer:
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41 def __init__(self, int x, int y, int width, int height):
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42 if use_debug_group:
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43 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "Framebuffer creation")
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44
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45 # This texture will receive the game area in native resolution.
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46 glGenTextures(1, &self.texture)
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47 glBindTexture(GL_TEXTURE_2D, self.texture)
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48 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
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49 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
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50 glTexImage2D(GL_TEXTURE_2D, 0,
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51 GL_RGBA,
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52 width, height,
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53 0,
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54 GL_RGBA, GL_UNSIGNED_BYTE,
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55 NULL)
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56 glBindTexture(GL_TEXTURE_2D, 0)
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57
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58 # We need a depth buffer, but don’t care about retrieving it.
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59 glGenRenderbuffers(1, &self.rbo)
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60 glBindRenderbuffer(GL_RENDERBUFFER, self.rbo)
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61 glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height)
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62 glBindRenderbuffer(GL_RENDERBUFFER, 0)
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63
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64 # The framebuffer is there as a rendering target.
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65 glGenFramebuffers(1, &self.fbo)
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66 glBindFramebuffer(GL_FRAMEBUFFER, self.fbo)
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67 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, self.texture, 0)
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68 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, self.rbo)
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69 assert glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE
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70 glBindFramebuffer(GL_FRAMEBUFFER, 0)
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71
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72 if not use_framebuffer_blit:
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73 # We’ll use only those vertices, everytime.
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74 self.buf[0] = PassthroughVertex(x, y, 0, 1)
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75 self.buf[1] = PassthroughVertex(x + width, y, 1, 1)
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76 self.buf[2] = PassthroughVertex(x, y + height, 0, 0)
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77 self.buf[3] = PassthroughVertex(x + width, y + height, 1, 0)
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78
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79 # Now we upload those vertices into a static vbo.
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80 glGenBuffers(1, &self.vbo)
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81 glBindBuffer(GL_ARRAY_BUFFER, self.vbo)
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82 glBufferData(GL_ARRAY_BUFFER, sizeof(self.buf), self.buf, GL_STATIC_DRAW)
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83
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84 # As a performance optimisation, if supported, store the rendering state into a vao.
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85 if use_vao:
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86 glGenVertexArrays(1, &self.vao)
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87 glBindVertexArray(self.vao)
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88 self.set_state()
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89 glBindVertexArray(0)
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90
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91 glBindBuffer(GL_ARRAY_BUFFER, 0)
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92
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93 # And finally the shader we’ll use to display everything.
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94 self.shader = PassthroughShader()
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95 self.mvp = ortho_2d(0., float(width), float(height), 0.)
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96 else:
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97 self.x = x
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98 self.y = y
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99 self.width = width
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100 self.height = height
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101
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102 if use_debug_group:
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
103 glPopDebugGroup()
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
104
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
105 def __dealloc__(self):
587
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
106 if not use_framebuffer_blit:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
107 glDeleteBuffers(1, &self.vbo)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
108 if use_vao:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
109 glDeleteVertexArrays(1, &self.vao)
610
1b31169dc344 Move the passthrough shader to the Framebuffer class, since it isn’t used in the use_framebuffer_blit path.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 609
diff changeset
110 if self.mvp != NULL:
1b31169dc344 Move the passthrough shader to the Framebuffer class, since it isn’t used in the use_framebuffer_blit path.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 609
diff changeset
111 free(self.mvp)
586
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
112 glDeleteTextures(1, &self.texture)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
113 glDeleteRenderbuffers(1, &self.rbo)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
114 glDeleteFramebuffers(1, &self.fbo)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
115
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
116 cpdef bind(self):
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
117 glBindFramebuffer(GL_FRAMEBUFFER, self.fbo)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
118
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
119 cdef void set_state(self) nogil:
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
120 glBindBuffer(GL_ARRAY_BUFFER, self.vbo)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
121
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
122 #TODO: find a way to use offsetof() instead of those ugly hardcoded values.
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
123 glVertexAttribPointer(0, 2, GL_SHORT, False, sizeof(PassthroughVertex), <void*>0)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
124 glEnableVertexAttribArray(0)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
125 glVertexAttribPointer(1, 2, GL_FLOAT, False, sizeof(PassthroughVertex), <void*>4)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
126 glEnableVertexAttribArray(1)
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
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parents:
diff changeset
127
617
a6af3ff86612 Change all “void except *” function into “bint except True”, to prevent PyErr_Occurred() from being called at each call.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 610
diff changeset
128 cdef bint render(self, int x, int y, int width, int height) except True:
587
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
129 if use_debug_group:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
130 glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "Framebuffer drawing")
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
131
609
23b9418e4b2f Remove generic usage of GL_DRAW_FRAMEBUFFER which was introduced in GL 3.0 with framebuffer_blit.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
132 glBindFramebuffer(GL_FRAMEBUFFER, 0)
23b9418e4b2f Remove generic usage of GL_DRAW_FRAMEBUFFER which was introduced in GL 3.0 with framebuffer_blit.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
133 glClear(GL_COLOR_BUFFER_BIT)
587
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
134
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
135 if use_framebuffer_blit:
609
23b9418e4b2f Remove generic usage of GL_DRAW_FRAMEBUFFER which was introduced in GL 3.0 with framebuffer_blit.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
136 glBindFramebuffer(GL_READ_FRAMEBUFFER, self.fbo)
587
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
137 glBlitFramebuffer(self.x, self.y, self.width, self.height,
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
138 x, y, x + width, y + height,
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
139 GL_COLOR_BUFFER_BIT, GL_LINEAR)
586
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
140 else:
610
1b31169dc344 Move the passthrough shader to the Framebuffer class, since it isn’t used in the use_framebuffer_blit path.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 609
diff changeset
141 self.shader.bind()
1b31169dc344 Move the passthrough shader to the Framebuffer class, since it isn’t used in the use_framebuffer_blit path.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 609
diff changeset
142 self.shader.uniform_matrix('mvp', self.mvp)
1b31169dc344 Move the passthrough shader to the Framebuffer class, since it isn’t used in the use_framebuffer_blit path.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 609
diff changeset
143
587
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
144 glViewport(x, y, width, height)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
145 glBlendFunc(GL_ONE, GL_ZERO)
586
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
146
587
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
147 if use_vao:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
148 glBindVertexArray(self.vao)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
149 else:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
150 self.set_state()
586
4b0593da29d5 Simplify framebuffer rendering with glDrawArrays, and move it all to its own file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
151
587
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
152 glBindTexture(GL_TEXTURE_2D, self.texture)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
153 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
154 glBindTexture(GL_TEXTURE_2D, 0)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
155
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
156 if use_vao:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
157 glBindVertexArray(0)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
158 else:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
159 glBindBuffer(GL_ARRAY_BUFFER, 0)
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
160
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
161 if use_debug_group:
6c9d8a3d853f Use ARB_framebuffer_blit instead of a second rendering pass for scaled rendering, if supported, and remove framebuffer stuff from the Renderer.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 586
diff changeset
162 glPopDebugGroup()