private static TagPreviewViewModel GetSpasPreview(ShaderPassTag spas)
{
var preview = new TagPreviewViewModel();
var shaderCount = 0;
foreach (var wrapper in spas.Wrapper1s)
{
foreach (var wrapper2 in wrapper.Wrapper2s)
{
foreach (var shader in wrapper2.ShaderReferenceGroups1)
{
if (shader.ShaderData1?.Length > 0)
{
preview.AddItem($"Shader {shaderCount++}", shader.ShaderData1, GetShaderPreview);
}
if (shader.ShaderData2?.Length > 0)
{
preview.AddItem($"Shader {shaderCount++}", shader.ShaderData2, GetShaderPreview);
}
if (shader.ShaderData3?.Length > 0)
{
preview.AddItem($"Shader {shaderCount++}", shader.ShaderData3, GetShaderPreview);
}
}
}
}
return(preview);
}
private static TagPreviewViewModel GetVertexPreview(VertexShaderTag vert)
{
var preview = new TagPreviewViewModel();
var shaderCount = 0;
foreach (var shader in vert.Shaders)
{
if (shader.ShaderData?.Length > 0)
{
preview.AddItem($"Shader {shaderCount++}", shader.ShaderData, GetShaderPreview);
}
}
return(preview);
}
private static TagPreviewViewModel GetBitmPreview(BitmapTag bitm)
{
var preview = new TagPreviewViewModel();
preview.AddItem("bitmap", bitm, GetBitmapPreview);
return(preview);
object GetBitmapPreview(BitmapTag bitm)
{
// HACK: hard coding texture 0, needs texture binder rewrite to support here
if (bitm.TextureInfos[0].Width == 0 || bitm.TextureInfos[0].Height == 0)
{
return(null);
}
var textureBinder = new OpenGLTextureBinder();
var settings = new GameWindowSettings();
var nsettings = new NativeWindowSettings()
{
API = ContextAPI.OpenGL,
AutoLoadBindings = true,
Size = new OpenTK.Mathematics.Vector2i(bitm.TextureInfos[0].Width, bitm.TextureInfos[0].Height),
Title = "OpenH2",
Flags = ContextFlags.Debug | ContextFlags.Offscreen,
APIVersion = new Version(4, 0)
};
var window = new GameWindow(settings, nsettings);
window.IsVisible = false;
window.MakeCurrent();
GL.Enable(EnableCap.DebugOutput);
GL.DebugMessageCallback(callback, (IntPtr.Zero));
GL.Enable(EnableCap.DepthTest);
GL.Enable(EnableCap.CullFace);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
var meshId = UploadQuadMesh();
var matriciesUniform = new GlobalUniform()
{
ProjectionMatrix = Matrix4x4.CreateOrthographic(2f, 2f, 0, 10),
ViewMatrix = Matrix4x4.Identity,
ViewPosition = Vector3.Zero
};
var shader = ShaderCompiler.CreateShader(Shader.TextureViewer);
var handle = textureBinder.GetOrBind(bitm, out var _);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, handle);
GL.ClearColor(0f, 0f, 0f, 1f);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.UseProgram(shader);
GL.GenBuffers(1, out uint MatriciesUniformHandle);
GL.BindBuffer(BufferTarget.UniformBuffer, MatriciesUniformHandle);
GL.BufferData(BufferTarget.UniformBuffer, GlobalUniform.Size, ref matriciesUniform, BufferUsageHint.DynamicDraw);
GL.BindBufferBase(BufferRangeTarget.UniformBuffer, 0, MatriciesUniformHandle);
GL.BindBuffer(BufferTarget.UniformBuffer, 0);
GL.BindVertexArray(meshId);
GL.DrawElements(PrimitiveType.Triangles, 6, DrawElementsType.UnsignedInt, 0);
GL.Flush();
var bmp = new WriteableBitmap(new PixelSize(bitm.TextureInfos[0].Width, bitm.TextureInfos[0].Height), new Avalonia.Vector(72, 72), Avalonia.Platform.PixelFormat.Rgba8888);
using (var buf = bmp.Lock())
{
GL.ReadPixels(0, 0, bitm.TextureInfos[0].Width, bitm.TextureInfos[0].Height, PixelFormat.Rgba, PixelType.UnsignedByte, buf.Address);
}
window.Close();
window.Dispose();
return(bmp);
}
}
