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55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
//go:build js
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package webgl2
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import (
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"strconv"
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"strings"
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"syscall/js"
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"aego/core/errs"
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"aego/core/handle"
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"aego/gpu"
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)
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func (d *Device) UniformBlockLayout(h gpu.ShaderHandle, slot int) (gpu.UniformBlockLayout, bool, error) {
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s, ok := d.shaders.Get(handle.Cast[glShader](h))
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if !ok {
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return gpu.UniformBlockLayout{}, false, errs.New(errs.GPUInvalidHandle, "uniform layout: invalid shader")
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}
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program := d.obj.get(s.program)
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block := d.call(d.f.GetUniformBlockIndex, program, "ub"+strconv.Itoa(slot))
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if block.Type() != js.TypeNumber || block.Float() == 4294967295 {
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return gpu.UniformBlockLayout{}, false, nil
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}
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idx := block.Int()
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out := gpu.UniformBlockLayout{Size: num(d.call(d.f.GetActiveUniformBlockParameter, program, idx, 0x8A40))}
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indices := d.call(d.f.GetActiveUniformBlockParameter, program, idx, 0x8A43)
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offsets := d.call(d.f.GetActiveUniforms, program, indices, 0x8A3B)
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for i := 0; i < indices.Length(); i++ {
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info := d.call(d.f.GetActiveUniform, program, indices.Index(i))
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out.Members = append(out.Members, gpu.UniformMember{Name: strings.TrimSuffix(info.Get("name").String(), "[0]"), Type: uniformType(uint32(num(info.Get("type")))), Offset: num(offsets.Index(i))})
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}
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return out, true, nil
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}
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func uniformType(t uint32) string {
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switch t {
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case 0x1406:
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return "float"
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case 0x1404:
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return "int"
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case 0x8B56:
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return "bool"
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case 0x8B50:
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return "vec2"
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case 0x8B51:
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return "vec3"
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case 0x8B52:
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return "vec4"
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case 0x8B5C:
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return "mat4"
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}
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return "unknown"
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}
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