private async Task CreateGifAsync(TextureArray2D left, TextureArray2D right, Config cfg, IProgress progress)
{
// delay in milliseconds
var numFrames = cfg.FramesPerSecond * cfg.NumSeconds;
try
{
progressModel.EnableDllProgress = false;
var leftView = left.GetSrView(LayerMipmapSlice.Mip0);
var rightView = right.GetSrView(LayerMipmapSlice.Mip0);
var curProg = progress.CreateSubProgress(0.9f);
// create frames
using (var dst = IO.CreateImage(new ImageFormat(Format.R8G8B8A8_UNorm_SRgb), left.Size, LayerMipmapCount.One))
{
var dstMip = dst.GetMipmap(LayerMipmapSlice.Mip0);
var dstPtr = dstMip.Bytes;
var dstSize = dstMip.ByteSize;
// render frames into texture
using (var frame = new TextureArray2D(LayerMipmapCount.One, left.Size,
Format.R8G8B8A8_UNorm_SRgb, false))
{
var frameView = frame.GetRtView(LayerMipmapSlice.Mip0);
for (int i = 0; i < numFrames; ++i)
{
float t = (float)i / (numFrames);
int borderPos = (int)(t * frame.Size.Width);
// render frame
shader.Run(leftView, rightView, frameView, cfg.SliderWidth, borderPos,
frame.Size.Width, frame.Size.Height);
// save frame as png
frame.CopyPixels(LayerMipmapSlice.Mip0, dstPtr, dstSize);
var filename = $"{cfg.TmpFilename}{i:D4}";
await Task.Run(() => IO.SaveImage(dst, filename, "png", GliFormat.RGBA8_SRGB), progress.Token);
curProg.Progress = i / (float)numFrames;
curProg.What = "creating frames";
}
}
}
// convert video
await FFMpeg.ConvertAsync(cfg, progress.CreateSubProgress(1.0f));
}
finally
{
progressModel.EnableDllProgress = true;
}
}
private async Task CreateGifAsync(Config cfg, IProgress progress, SharedModel shared)
{
// delay in milliseconds
var numFrames = cfg.FramesPerSecond * cfg.NumSeconds;
var left = cfg.Left;
var right = cfg.Right;
var overlay = cfg.Overlay;
// size compatible?
bool disposeImages = false;
if ((left.Size.Width % 2) != 0 || (left.Size.Height % 2) != 0)
{
disposeImages = true;
var pad = Size3.Zero;
pad.X = left.Size.Width % 2;
pad.Y = left.Size.Height % 2;
left = (TextureArray2D)shared.Padding.Run(left, Size3.Zero, pad, PaddingShader.FillMode.Clamp, null, shared, false);
right = (TextureArray2D)shared.Padding.Run(right, Size3.Zero, pad, PaddingShader.FillMode.Clamp, null, shared, false);
if (overlay != null)
{
overlay = (TextureArray2D)shared.Padding.Run(overlay, Size3.Zero, pad,
PaddingShader.FillMode.Transparent, null, shared, false);
}
Debug.Assert(left.Size.Width % 2 == 0 && left.Size.Height % 2 == 0);
}
try
{
progressModel.EnableDllProgress = false;
var leftView = left.GetSrView(LayerMipmapSlice.Mip0);
var rightView = right.GetSrView(LayerMipmapSlice.Mip0);
var overlayView = overlay?.GetSrView(LayerMipmapSlice.Mip0);
var curProg = progress.CreateSubProgress(0.9f);
// prepare parallel processing
var numTasks = Environment.ProcessorCount;
var tasks = new Task[numTasks];
var images = new DllImageData[numTasks];
for (int i = 0; i < numTasks; ++i)
{
images[i] = IO.CreateImage(new ImageFormat(Format.R8G8B8A8_UNorm_SRgb), left.Size,
LayerMipmapCount.One);
}
int textSize = left.Size.Y / 18;
float padding = textSize / 4.0f;
// render frames into texture
using (var frame = new TextureArray2D(LayerMipmapCount.One, left.Size,
Format.R8G8B8A8_UNorm_SRgb, false))
{
var frameView = frame.GetRtView(LayerMipmapSlice.Mip0);
using (var d2d = new Direct2D(frame))
{
for (int i = 0; i < numFrames; ++i)
{
float t = (float)i / (numFrames - 1);
int borderPos = (int)(t * (frame.Size.Width - 1));
int idx = i % numTasks;
// render frame
shader.Run(leftView, rightView, overlayView, frameView, cfg.SliderWidth, borderPos,
frame.Size.Width, frame.Size.Height, shared.QuadShader, shared.Upload);
// add text
using (var c = d2d.Begin())
{
c.Text(new Float2(padding), new Float2(left.Size.X - padding, left.Size.Y - padding),
textSize, Colors.White, cfg.Label1, TextAlignment.Leading);
c.Text(new Float2(padding), new Float2(left.Size.X - padding, left.Size.Y - padding), textSize,
Colors.White, cfg.Label2, TextAlignment.Trailing);
}
// copy frame from gpu to cpu
var dstMip = images[idx].GetMipmap(LayerMipmapSlice.Mip0);
var dstPtr = dstMip.Bytes;
var dstSize = dstMip.ByteSize;
// wait for previous task to finish before writing it to the file
if (tasks[idx] != null)
{
await tasks[idx];
}
frame.CopyPixels(LayerMipmapSlice.Mip0, dstPtr, dstSize);
var filename = $"{cfg.TmpFilename}{i:D4}";
// write to file
tasks[idx] = Task.Run(() =>
{
try
{
IO.SaveImage(images[idx], filename, "png", GliFormat.RGBA8_SRGB);
}
catch (Exception)
{
// ignored (probably cancelled by user)
}
}, progress.Token);
curProg.Progress = i / (float)numFrames;
curProg.What = "creating frames";
progress.Token.ThrowIfCancellationRequested();
}
}
}
// wait for tasks to finish
for (var i = 0; i < tasks.Length; i++)
{
if (tasks[i] != null)
{
await tasks[i];
}
tasks[i] = null;
}
// convert video
await FFMpeg.ConvertAsync(cfg, progress.CreateSubProgress(1.0f));
}
finally
{
progressModel.EnableDllProgress = true;
if (disposeImages)
{
left.Dispose();
right.Dispose();
overlay?.Dispose();
}
}
}