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basically just a non msaa framebuffer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| #version 330 core | ||
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| in vec2 fTexCoords; | ||
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| uniform sampler2D screenTexture; | ||
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| out vec4 FragColor; | ||
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| void main() | ||
| { | ||
| FragColor = texture(screenTexture, fTexCoords); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| #version 330 core | ||
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| layout (location = 0) in vec2 vPos; | ||
| layout (location = 1) in vec2 vTexCoords; | ||
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| out vec2 fTexCoords; | ||
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| void main() | ||
| { | ||
| gl_Position = vec4(vPos.x, vPos.y, 0.0, 1.0); | ||
| fTexCoords = vTexCoords; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,104 @@ | ||
| using System; | ||
| using Silk.NET.Maths; | ||
| using Silk.NET.OpenGL; | ||
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| namespace FModel.Views.Snooper; | ||
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| public class FramebufferObject : IDisposable | ||
| { | ||
| private uint _handle; | ||
| private GL _gl; | ||
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| private readonly int _width; | ||
| private readonly int _height; | ||
| private readonly RenderbufferObject _renderbuffer; | ||
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| private BufferObject<uint> _ebo; | ||
| private BufferObject<float> _vbo; | ||
| private VertexArrayObject<float, uint> _vao; | ||
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| private Shader _shader; | ||
| private Texture _texture; | ||
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| public readonly uint[] Indices = { 0, 1, 2, 3, 4, 5 }; | ||
| public readonly float[] Vertices = { | ||
| // Coords // texCoords | ||
| 1.0f, -1.0f, 1.0f, 0.0f, | ||
| -1.0f, -1.0f, 0.0f, 0.0f, | ||
| -1.0f, 1.0f, 0.0f, 1.0f, | ||
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| 1.0f, 1.0f, 1.0f, 1.0f, | ||
| 1.0f, -1.0f, 1.0f, 0.0f, | ||
| -1.0f, 1.0f, 0.0f, 1.0f | ||
| }; | ||
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| public FramebufferObject(Vector2D<int> size) | ||
| { | ||
| _width = size.X; | ||
| _height = size.Y; | ||
| _renderbuffer = new RenderbufferObject((uint) _width, (uint) _height); | ||
| } | ||
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| public void Setup(GL gl) | ||
| { | ||
| _gl = gl; | ||
| _handle = _gl.GenFramebuffer(); | ||
| Bind(); | ||
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| _texture = new Texture(_gl, (uint) _width, (uint) _height); | ||
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| _renderbuffer.Setup(gl); | ||
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| _shader = new Shader(_gl, "framebuffer.vert", "framebuffer.frag"); | ||
| _shader.Use(); | ||
| _shader.SetUniform("screenTexture", 0); | ||
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| _ebo = new BufferObject<uint>(_gl, Indices, BufferTargetARB.ElementArrayBuffer); | ||
| _vbo = new BufferObject<float>(_gl, Vertices, BufferTargetARB.ArrayBuffer); | ||
| _vao = new VertexArrayObject<float, uint>(_gl, _vbo, _ebo); | ||
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| _vao.VertexAttributePointer(0, 2, VertexAttribPointerType.Float, 4, 0); // position | ||
| _vao.VertexAttributePointer(1, 2, VertexAttribPointerType.Float, 4, 2); // uv | ||
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| var status = _gl.CheckFramebufferStatus(FramebufferTarget.Framebuffer); | ||
| if (status != GLEnum.FramebufferComplete) | ||
| { | ||
| throw new Exception($"Framebuffer failed to bind with error: {_gl.GetProgramInfoLog(_handle)}"); | ||
| } | ||
| } | ||
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| public void Bind() | ||
| { | ||
| _gl.BindFramebuffer(FramebufferTarget.DrawFramebuffer, _handle); | ||
| } | ||
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| public void UnBind() | ||
| { | ||
| _gl.BindFramebuffer(FramebufferTarget.DrawFramebuffer, 0); | ||
| } | ||
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| public void BindStuff() | ||
| { | ||
| _gl.DepthMask(false); | ||
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| _shader.Use(); | ||
| _vao.Bind(); | ||
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| _texture.Bind(TextureUnit.Texture0); | ||
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| _gl.DrawArrays(PrimitiveType.Triangles, 0, (uint) Indices.Length); | ||
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| _gl.DepthMask(true); | ||
| } | ||
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| public IntPtr GetPointer() => _texture.GetPointer(); | ||
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| public void Dispose() | ||
| { | ||
| _vao.Dispose(); | ||
| _shader.Dispose(); | ||
| _texture.Dispose(); | ||
| _renderbuffer.Dispose(); | ||
| _gl.DeleteFramebuffer(_handle); | ||
| } | ||
| } |
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