1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
import moderngl
from PIL import Image
ctx = moderngl.create_standalone_context()
fbo = ctx.framebuffer([ctx.renderbuffer((800, 800), components=4, samples=16)])
output = ctx.framebuffer([ctx.renderbuffer((800, 800), components=4)])
prog = ctx.program(
vertex_shader='''
#version 330 core
vec2 vertex[3] = vec2[](
vec2(1.0, 0.0),
vec2(-0.5, -0.86),
vec2(-0.5, 0.86)
);
vec3 color[3] = vec3[](
vec3(0.0, 0.0, 1.0),
vec3(0.0, 1.0, 0.0),
vec3(1.0, 0.0, 0.0)
);
out vec3 v_color;
void main() {
v_color = color[gl_VertexID];
float r = (gl_InstanceID - 4) * 0.15;
mat2 rot = mat2(cos(r), sin(r), -sin(r), cos(r));
gl_Position = vec4(rot * vertex[gl_VertexID] * 0.95, 0.0, 1.0);
}
''',
fragment_shader='''
#version 330 core
in vec3 v_color;
out vec4 f_color;
void main() {
f_color = vec4(pow(v_color, vec3(1.0 / 2.2)), 1.0);
}
''',
)
vao = ctx.vertex_array(prog, [])
vao.instances = 9
vao.vertices = 3
fbo.use()
ctx.clear()
vao.render()
ctx.copy_framebuffer(output, fbo)
img = Image.frombuffer('RGBA', output.size, output.read(components=4)).transpose(Image.Transpose.FLIP_TOP_BOTTOM)
img.save('logo.png')
|
