private void ApplyStateCore(GraphicsContext ctx, ShaderProgram program, BlendState currentState)
{
if (Enabled)
{
// Enable blending
if (currentState.Enabled == false)
{
Gl.Enable(EnableCap.Blend);
}
// Set blending equation
if (ctx.Extensions.BlendMinmax_EXT)
{
if (EquationSeparated)
{
if (currentState.RgbEquation != RgbEquation || currentState.AlphaEquation != AlphaEquation)
{
Gl.BlendEquationSeparate(RgbEquation, AlphaEquation);
}
}
else
{
if (currentState.RgbEquation != RgbEquation)
{
Gl.BlendEquation(RgbEquation);
}
}
}
// Set blending function
if (FunctionSeparated)
{
if (currentState._RgbSrcFactor != _RgbSrcFactor || currentState._RgbDstFactor != _RgbDstFactor || currentState._AlphaSrcFactor != _AlphaSrcFactor || currentState._AlphaDstFactor != _AlphaDstFactor)
{
Gl.BlendFuncSeparate(_RgbSrcFactor, _RgbDstFactor, _AlphaSrcFactor, _AlphaDstFactor);
}
}
else
{
if (currentState._RgbSrcFactor != _RgbSrcFactor || currentState._RgbDstFactor != _RgbDstFactor)
{
Gl.BlendFunc(_RgbSrcFactor, _RgbDstFactor);
}
}
// Set blend color, if required
if (RequiresConstColor(_RgbSrcFactor) || RequiresConstColor(_AlphaSrcFactor) || RequiresConstColor(_RgbDstFactor) || RequiresConstColor(_AlphaDstFactor))
{
Gl.BlendColor(_BlendColor.r, _BlendColor.g, _BlendColor.b, _BlendColor.a);
}
}
else
{
// Disable blending
if (currentState.Enabled == true)
{
Gl.Disable(EnableCap.Blend);
}
}
}
private void renderGlToBuffer(int frameIdx = -1)
{
ParticleEditModel md = MainModel.ins.particleEditModel;
if (md == null || md.width == 0 || md.height == 0)
{
return;
}
float x = 0;
float y = 0;
int w = md.width;
int h = md.height;
int time = renderTime;
if (frameIdx >= 0)
{
time = (int)((float)frameIdx / md.fps * 1000);
}
//int vpx = 0;
//int vpy = 0;
//int vpw = w;
//int vph = h;
//Gl.Viewport(vpx, vpy, vpw, vph);
//Gl.Clear(ClearBufferMask.ColorBufferBit);
//Gl.MatrixMode(MatrixMode.Projection);
//Gl.LoadIdentity();
//Gl.Ortho(0.0, w, 0.0, h, 0.0, 1.0);
//Gl.MatrixMode(MatrixMode.Modelview);
//Gl.LoadIdentity();
Gl.BlendFuncSeparate(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha, BlendingFactor.One, BlendingFactor.OneMinusSrcAlpha);
Gl.BlendEquation(BlendEquationMode.FuncAdd);
renderInitMatrix(w, h);
//mask
if (md.isMaskBox)
{
Gl.Enable(EnableCap.ScissorTest);
Gl.Scissor((int)x, (int)y, md.width, md.height);
}
//emitter
for (int i = 0; i < lstEmitter.Count; ++i)
{
lstEmitter[i].setStartPos((int)x, (int)y);
lstEmitter[i].render(bufferMVP, time);
}
//mask
if (md.isMaskBox)
{
Gl.Disable(EnableCap.ScissorTest);
}
}
/// <summary>
/// Set ShaderProgram state.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> which has defined the shader program <paramref name="sProgram"/>.
/// </param>
/// <param name="sProgram">
/// The <see cref="ShaderProgram"/> which has the state set.
/// </param>
public override void ApplyState(GraphicsContext ctx, ShaderProgram sProgram)
{
if (ctx == null)
{
throw new ArgumentNullException("ctx");
}
BlendState currentState = null; // (BlendState)ctx.CurrentState[StateId];
if (Enabled)
{
// Enable blending
if (currentState == null || !currentState.Enabled)
{
Gl.Enable(EnableCap.Blend);
}
// Set blending equation
if (ctx.Caps.GlExtensions.BlendMinmax_EXT)
{
if (EquationSeparated)
{
Gl.BlendEquationSeparate(RgbEquation, AlphaEquation);
}
else
{
Gl.BlendEquation((int)RgbEquation);
}
}
// Set blending function
if (FunctionSeparated)
{
Gl.BlendFuncSeparate((int)mRgbSrcFactor, (int)mRgbDstFactor, (int)mAlphaSrcFactor, (int)mAlphaDstFactor);
}
else
{
Gl.BlendFunc(mRgbSrcFactor, mRgbDstFactor);
}
// Set blend color, if required
if (RequiresConstColor(mRgbSrcFactor) || RequiresConstColor(mAlphaSrcFactor) || RequiresConstColor(mRgbDstFactor) || RequiresConstColor(mAlphaDstFactor))
{
Gl.BlendColor(mBlendColor.Red, mBlendColor.Green, mBlendColor.Blue, mBlendColor.Alpha);
}
}
else
{
// Disable blending
if (currentState == null || currentState.Enabled)
{
Gl.Disable(EnableCap.Blend);
}
}
}
private void ApplyStateCore(GraphicsContext ctx, ShaderProgram program)
{
if (Enabled)
{
// Enable blending
Gl.Enable(EnableCap.Blend);
// Set blending equation
if (ctx.Extensions.BlendMinmax_EXT)
{
if (EquationSeparated)
{
Gl.BlendEquationSeparate(RgbEquation, AlphaEquation);
}
else
{
Gl.BlendEquation((int)RgbEquation);
}
}
// Set blending function
if (FunctionSeparated)
{
Gl.BlendFuncSeparate((int)_RgbSrcFactor, (int)_RgbDstFactor, (int)_AlphaSrcFactor, (int)_AlphaDstFactor);
}
else
{
Gl.BlendFunc(_RgbSrcFactor, _RgbDstFactor);
}
// Set blend color, if required
if (RequiresConstColor(_RgbSrcFactor) || RequiresConstColor(_AlphaSrcFactor) || RequiresConstColor(_RgbDstFactor) || RequiresConstColor(_AlphaDstFactor))
{
Gl.BlendColor(_BlendColor.Red, _BlendColor.Green, _BlendColor.Blue, _BlendColor.Alpha);
}
}
else
{
// Disable blending
Gl.Disable(EnableCap.Blend);
}
}
private void SetupRenderState(ImDrawDataPtr drawData)
{
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, polygon fill
Gl.Enable(EnableCap.Blend);
Gl.BlendEquation(BlendEquationMode.FuncAdd);
Gl.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
Gl.Disable(EnableCap.CullFace);
Gl.Disable(EnableCap.DepthTest);
Gl.Enable(EnableCap.ScissorTest);
Gl.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Fill);
// Setup viewport, orthographic projection matrix
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
Gl.Viewport(0, 0, (int)(drawData.DisplaySize.X * drawData.FramebufferScale.X), (int)(drawData.DisplaySize.Y * drawData.FramebufferScale.Y));
var L = drawData.DisplayPos.X;
var R = drawData.DisplayPos.X + drawData.DisplaySize.X;
var T = drawData.DisplayPos.Y;
var B = drawData.DisplayPos.Y + drawData.DisplaySize.Y;
var ortho_projection = new float[]
{
2f / (R - L), 0, 0, 0,
0, 2f / (T - B), 0, 0,
0, 0, -1f, 0,
(R + L) / (L - R), (T + B) / (B - T), 0, 1f
};
Gl.UseProgram(_shaderHandle);
Gl.Uniform1(_attribLocationTex, 0);
Gl.UniformMatrix4(_attribLocationProjMtx, false, ortho_projection);
Gl.BindVertexArray(_vertexArrayObject);
// Bind vertex/index buffers and setup attributes for ImDrawVert
Gl.BindBuffer(BufferTarget.ArrayBuffer, _vboHandle);
Gl.BindBuffer(BufferTarget.ElementArrayBuffer, _elementsHandle);
Gl.EnableVertexAttribArray((uint)_attribLocationVtxPos);
Gl.EnableVertexAttribArray((uint)_attribLocationVtxUV);
Gl.EnableVertexAttribArray((uint)_attribLocationVtxColor);
Gl.VertexAttribPointer((uint)_attribLocationVtxPos, 2, VertexAttribType.Float, false, Unsafe.SizeOf <ImDrawVert>(), Marshal.OffsetOf(typeof(ImDrawVert), "pos"));
Gl.VertexAttribPointer((uint)_attribLocationVtxUV, 2, VertexAttribType.Float, false, Unsafe.SizeOf <ImDrawVert>(), Marshal.OffsetOf(typeof(ImDrawVert), "uv"));
Gl.VertexAttribPointer((uint)_attribLocationVtxColor, 4, VertexAttribType.UnsignedByte, true, Unsafe.SizeOf <ImDrawVert>(), Marshal.OffsetOf(typeof(ImDrawVert), "col"));
}
private void RenderImGui(ImDrawDataPtr drawData)
{
// TODO: use abstract graphics impl
Gl.BlendEquation(BlendEquationMode.FuncAdd);
Gl.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
Gl.Disable(EnableCap.CullFace);
Gl.Disable(EnableCap.DepthTest);
Gl.Enable(EnableCap.ScissorTest);
io.DisplaySize = new Vector2(Constants.windowWidth, Constants.windowHeight);
var projectionMatrix = Matrix4x4f.Ortho2D(0f, io.DisplaySize.X, io.DisplaySize.Y, 0.0f);
imguiShader.Use();
imguiShader.SetInt("albedoTexture", 0);
imguiShader.SetMatrix("projection", projectionMatrix);
Gl.BindVertexArray(vao);
Gl.BindBuffer(BufferTarget.ArrayBuffer, vbo);
Gl.BindBuffer(BufferTarget.ElementArrayBuffer, ebo);
Gl.EnableVertexAttribArray(0); // Position
Gl.EnableVertexAttribArray(1); // UV Coord
Gl.EnableVertexAttribArray(2); // Colors
Gl.VertexAttribPointer(0, 2, VertexAttribType.Float, false, 20, (IntPtr)0);
Gl.VertexAttribPointer(1, 2, VertexAttribType.Float, false, 20, (IntPtr)(2 * sizeof(float)));
Gl.VertexAttribPointer(2, 4, VertexAttribType.UnsignedByte, true, 20, (IntPtr)(4 * sizeof(float)));
var clipOffset = drawData.DisplayPos;
var clipScale = drawData.FramebufferScale;
for (var commandListIndex = 0; commandListIndex < drawData.CmdListsCount; commandListIndex++)
{
int indexOffset = 0;
var commandList = drawData.CmdListsRange[commandListIndex];
Gl.BufferData(BufferTarget.ArrayBuffer, (uint)(commandList.VtxBuffer.Size * 20), commandList.VtxBuffer.Data, BufferUsage.DynamicDraw);
Gl.BufferData(BufferTarget.ElementArrayBuffer, (uint)(commandList.IdxBuffer.Size * 2), commandList.IdxBuffer.Data, BufferUsage.DynamicDraw);
for (var commandIndex = 0; commandIndex < commandList.CmdBuffer.Size; commandIndex++)
{
var currentCommand = commandList.CmdBuffer[commandIndex];
var clipBounds = new Vector4f(
(currentCommand.ClipRect.X - clipOffset.X) * clipScale.X,
(currentCommand.ClipRect.Y - clipOffset.Y) * clipScale.Y,
(currentCommand.ClipRect.Z - clipOffset.X) * clipScale.X,
(currentCommand.ClipRect.W - clipOffset.Y) * clipScale.Y
);
Gl.Scissor((int)clipBounds.x, (int)(windowSize.Y - clipBounds.w), (int)(clipBounds.z - clipBounds.x), (int)(clipBounds.w - clipBounds.y));
Gl.ActiveTexture(TextureUnit.Texture0);
Gl.BindTexture(TextureTarget.Texture2d, defaultFontTexture.Id);
Gl.DrawElementsBaseVertex(PrimitiveType.Triangles, (int)currentCommand.ElemCount, DrawElementsType.UnsignedShort, (IntPtr)(indexOffset * 2), 0);
indexOffset += (int)currentCommand.ElemCount;
}
}
// TODO: Move these elsewhere to prevent later confusion
Gl.Disable(EnableCap.ScissorTest);
Gl.Enable(EnableCap.DepthTest);
Gl.Enable(EnableCap.CullFace);
}