mirror of https://github.com/liamg/aminal.git
54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
package gui
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import (
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"fmt"
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"strings"
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"github.com/go-gl/gl/all-core/gl" // OR: github.com/go-gl/gl/v2.1/gl
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)
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const (
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vertexShaderSource = `
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#version 150
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in vec3 vp;
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in vec3 inColour;
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smooth out vec3 theColour;
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void main() {
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gl_Position = vec4(vp, 1.0);
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theColour = inColour;
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}
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` + "\x00"
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fragmentShaderSource = `
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#version 150
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smooth in vec3 theColour;
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out vec4 outColour;
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void main() {
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outColour = vec4(theColour, 1.0);
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}
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` + "\x00"
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)
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func compileShader(source string, shaderType uint32) (uint32, error) {
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shader := gl.CreateShader(shaderType)
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csources, free := gl.Strs(source)
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gl.ShaderSource(shader, 1, csources, nil)
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free()
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gl.CompileShader(shader)
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var status int32
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gl.GetShaderiv(shader, gl.COMPILE_STATUS, &status)
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if status == gl.FALSE {
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var logLength int32
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gl.GetShaderiv(shader, gl.INFO_LOG_LENGTH, &logLength)
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log := strings.Repeat("\x00", int(logLength+1))
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gl.GetShaderInfoLog(shader, logLength, nil, gl.Str(log))
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return 0, fmt.Errorf("failed to compile %v: %v", source, log)
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}
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return shader, nil
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}
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