void CreateDrawCommands(CommandBuffer cmd, ImDrawDataPtr drawData, Vector2 fbSize)
{
var prevTextureId = System.IntPtr.Zero;
var clipOffst = new Vector4(drawData.DisplayPos.x, drawData.DisplayPos.y, drawData.DisplayPos.x, drawData.DisplayPos.y);
var clipScale = new Vector4(drawData.FramebufferScale.x, drawData.FramebufferScale.y, drawData.FramebufferScale.x, drawData.FramebufferScale.y);
_material.SetBuffer(_verticesID, _vtxBuf); // bind vertex buffer
cmd.SetViewport(new Rect(0f, 0f, fbSize.x, fbSize.y));
cmd.SetViewProjectionMatrices(
Matrix4x4.Translate(new Vector3(0.5f / fbSize.x, 0.5f / fbSize.y, 0f)), // small adjustment to improve text
Matrix4x4.Ortho(0f, fbSize.x, fbSize.y, 0f, 0f, 1f));
int vtxOf = 0;
int argOf = 0;
for (int n = 0, nMax = drawData.CmdListsCount; n < nMax; ++n)
{
ImDrawListPtr drawList = drawData.CmdListsRange[n];
for (int i = 0, iMax = drawList.CmdBuffer.Size; i < iMax; ++i, argOf += 5 * 4)
{
ImDrawCmdPtr drawCmd = drawList.CmdBuffer[i];
// TODO: user callback in drawCmd.UserCallback & drawCmd.UserCallbackData
// project scissor rectangle into framebuffer space and skip if fully outside
var clip = Vector4.Scale(drawCmd.ClipRect - clipOffst, clipScale);
if (clip.x >= fbSize.x || clip.y >= fbSize.y || clip.z < 0f || clip.w < 0f)
{
continue;
}
if (prevTextureId != drawCmd.TextureId)
{
_properties.SetTexture(_texID, _texManager.GetTexture((int)(prevTextureId = drawCmd.TextureId)));
}
_properties.SetInt(_baseVertexID, vtxOf + (int)drawCmd.VtxOffset); // base vertex location not automatically added to SV_VertexID
cmd.EnableScissorRect(new Rect(clip.x, fbSize.y - clip.w, clip.z - clip.x, clip.w - clip.y)); // invert y
cmd.DrawProceduralIndirect(_idxBuf, Matrix4x4.identity, _material, -1, MeshTopology.Triangles, _argBuf, argOf, _properties);
}
vtxOf += drawList.VtxBuffer.Size;
}
cmd.DisableScissorRect();
}
private void CreateDrawCommands(CommandBuffer cmd, ImDrawDataPtr drawData, Vector2 fbSize)
{
System.IntPtr prevTextureId = System.IntPtr.Zero;
Vector4 clipOffst = new Vector4(drawData.DisplayPos.X, drawData.DisplayPos.Y, drawData.DisplayPos.X, drawData.DisplayPos.Y);
Vector4 clipScale = new Vector4(drawData.FramebufferScale.X, drawData.FramebufferScale.Y, drawData.FramebufferScale.X, drawData.FramebufferScale.Y);
cmd.SetViewport(new Rect(0f, 0f, fbSize.x, fbSize.y));
cmd.SetViewProjectionMatrices(
Matrix4x4.Translate(new Vector3(0.5f / fbSize.x, 0.5f / fbSize.y, 0f)), // small adjustment to improve text
Matrix4x4.Ortho(0f, fbSize.x, fbSize.y, 0f, 0f, 1f));
int subOf = 0;
for (int n = 0, nMax = drawData.CmdListsCount; n < nMax; ++n)
{
ImDrawListPtr drawList = drawData.CmdListsRange[n];
for (int i = 0, iMax = drawList.CmdBuffer.Size; i < iMax; ++i, ++subOf)
{
ImDrawCmdPtr drawCmd = drawList.CmdBuffer[i];
// TODO: user callback in drawCmd.UserCallback & drawCmd.UserCallbackData
// project scissor rectangle into framebuffer space and skip if fully outside
Vector4 clip = Vector4.Scale(Helper.V4f(drawCmd.ClipRect) - clipOffst, clipScale);
if (clip.x >= fbSize.x || clip.y >= fbSize.y || clip.z < 0f || clip.w < 0f)
{
continue;
}
if (prevTextureId != drawCmd.TextureId)
{
_properties.SetTexture(_texID, _texManager.GetTexture((int)(prevTextureId = drawCmd.TextureId)));
}
cmd.EnableScissorRect(new Rect(clip.x, fbSize.y - clip.w, clip.z - clip.x, clip.w - clip.y)); // invert y
cmd.DrawMesh(_mesh, Matrix4x4.identity, _material, subOf, -1, _properties);
}
}
cmd.DisableScissorRect();
}
