Hugging Face's logo

Spaces:
Leon4gr45
/
UserSyncFrontend
Sleeping

App Files Community
UserSyncFrontend
File size: 5,841 Bytes
e7b2eb4
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
// @flow

import assert from 'assert';

import type Program from './program';
import type VertexBuffer from '../gl/vertex_buffer';
import type IndexBuffer from '../gl/index_buffer';
import type Context from '../gl/context';

class VertexArrayObject {
    context: Context;
    boundProgram: ?Program<*>;
    boundLayoutVertexBuffer: ?VertexBuffer;
    boundPaintVertexBuffers: Array<VertexBuffer>;
    boundIndexBuffer: ?IndexBuffer;
    boundVertexOffset: ?number;
    boundDynamicVertexBuffer: ?VertexBuffer;
    boundDynamicVertexBuffer2: ?VertexBuffer;
    vao: any;

    constructor() {
        this.boundProgram = null;
        this.boundLayoutVertexBuffer = null;
        this.boundPaintVertexBuffers = [];
        this.boundIndexBuffer = null;
        this.boundVertexOffset = null;
        this.boundDynamicVertexBuffer = null;
        this.vao = null;
    }

    bind(context: Context,
         program: Program<*>,
         layoutVertexBuffer: VertexBuffer,
         paintVertexBuffers: Array<VertexBuffer>,
         indexBuffer: ?IndexBuffer,
         vertexOffset: ?number,
         dynamicVertexBuffer: ?VertexBuffer,
         dynamicVertexBuffer2: ?VertexBuffer) {

        this.context = context;

        let paintBuffersDiffer = this.boundPaintVertexBuffers.length !== paintVertexBuffers.length;
        for (let i = 0; !paintBuffersDiffer && i < paintVertexBuffers.length; i++) {
            if (this.boundPaintVertexBuffers[i] !== paintVertexBuffers[i]) {
                paintBuffersDiffer = true;
            }
        }

        const isFreshBindRequired = (
            !this.vao ||
            this.boundProgram !== program ||
            this.boundLayoutVertexBuffer !== layoutVertexBuffer ||
            paintBuffersDiffer ||
            this.boundIndexBuffer !== indexBuffer ||
            this.boundVertexOffset !== vertexOffset ||
            this.boundDynamicVertexBuffer !== dynamicVertexBuffer ||
            this.boundDynamicVertexBuffer2 !== dynamicVertexBuffer2
        );

        if (!context.extVertexArrayObject || isFreshBindRequired) {
            this.freshBind(program, layoutVertexBuffer, paintVertexBuffers, indexBuffer, vertexOffset, dynamicVertexBuffer, dynamicVertexBuffer2);
        } else {
            context.bindVertexArrayOES.set(this.vao);

            if (dynamicVertexBuffer) {
                // The buffer may have been updated. Rebind to upload data.
                dynamicVertexBuffer.bind();
            }

            if (indexBuffer && indexBuffer.dynamicDraw) {
                indexBuffer.bind();
            }

            if (dynamicVertexBuffer2) {
                dynamicVertexBuffer2.bind();
            }
        }
    }

    freshBind(program: Program<*>,
              layoutVertexBuffer: VertexBuffer,
              paintVertexBuffers: Array<VertexBuffer>,
              indexBuffer: ?IndexBuffer,
              vertexOffset: ?number,
              dynamicVertexBuffer: ?VertexBuffer,
              dynamicVertexBuffer2: ?VertexBuffer) {
        let numPrevAttributes;
        const numNextAttributes = program.numAttributes;

        const context = this.context;
        const gl = context.gl;

        if (context.extVertexArrayObject) {
            if (this.vao) this.destroy();
            this.vao = context.extVertexArrayObject.createVertexArrayOES();
            context.bindVertexArrayOES.set(this.vao);
            numPrevAttributes = 0;

            // store the arguments so that we can verify them when the vao is bound again
            this.boundProgram = program;
            this.boundLayoutVertexBuffer = layoutVertexBuffer;
            this.boundPaintVertexBuffers = paintVertexBuffers;
            this.boundIndexBuffer = indexBuffer;
            this.boundVertexOffset = vertexOffset;
            this.boundDynamicVertexBuffer = dynamicVertexBuffer;
            this.boundDynamicVertexBuffer2 = dynamicVertexBuffer2;

        } else {
            numPrevAttributes = context.currentNumAttributes || 0;

            // Disable all attributes from the previous program that aren't used in
            // the new program. Note: attribute indices are *not* program specific!
            for (let i = numNextAttributes; i < numPrevAttributes; i++) {
                // WebGL breaks if you disable attribute 0.
                // http://stackoverflow.com/questions/20305231
                assert(i !== 0);
                gl.disableVertexAttribArray(i);
            }
        }

        layoutVertexBuffer.enableAttributes(gl, program);
        for (const vertexBuffer of paintVertexBuffers) {
            vertexBuffer.enableAttributes(gl, program);
        }

        if (dynamicVertexBuffer) {
            dynamicVertexBuffer.enableAttributes(gl, program);
        }
        if (dynamicVertexBuffer2) {
            dynamicVertexBuffer2.enableAttributes(gl, program);
        }

        layoutVertexBuffer.bind();
        layoutVertexBuffer.setVertexAttribPointers(gl, program, vertexOffset);
        for (const vertexBuffer of paintVertexBuffers) {
            vertexBuffer.bind();
            vertexBuffer.setVertexAttribPointers(gl, program, vertexOffset);
        }

        if (dynamicVertexBuffer) {
            dynamicVertexBuffer.bind();
            dynamicVertexBuffer.setVertexAttribPointers(gl, program, vertexOffset);
        }
        if (indexBuffer) {
            indexBuffer.bind();
        }
        if (dynamicVertexBuffer2) {
            dynamicVertexBuffer2.bind();
            dynamicVertexBuffer2.setVertexAttribPointers(gl, program, vertexOffset);
        }

        context.currentNumAttributes = numNextAttributes;
    }

    destroy() {
        if (this.vao) {
            this.context.extVertexArrayObject.deleteVertexArrayOES(this.vao);
            this.vao = null;
        }
    }
}

export default VertexArrayObject;