protected override void OnDrawFrame()
{
if (Size.Width <= 0 || Size.Height <= 0)
{
return;
}
int width = (int)Size.Width;
int height = (int)Size.Height;
int stride = 4 * (int)Size.Width;
using var pixelBuffer = new PixelBuffer((uint)width, (uint)height, PixelFormat.BGRA8888);
var buffer = pixelBuffer.GetBuffer();
var info = new SKImageInfo(width, height, SKColorType.Bgra8888);
using (var surface = SKSurface.Create(info, buffer, stride))
{
if (surface == null)
{
Invalidate();
return;
}
// draw using SkiaSharp
SendPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
surface.Canvas.Flush();
}
using var pixelData = PixelBuffer.Convert(pixelBuffer);
using var url = pixelData.GenerateUrl();
SetImage(url.ToString());
}
public void PixelBufferGetBuffer()
{
tlog.Debug(tag, $"PixelBufferGetBuffer START");
var testingTarget = new PixelBuffer(100, 50, PixelFormat.BGR8888);
Assert.IsNotNull(testingTarget, "Can't create success object PixelData");
Assert.IsInstanceOf <PixelBuffer>(testingTarget, "Should be an instance of PixelData type.");
var result = testingTarget.GetBuffer();
Assert.IsNotNull(result);
testingTarget.Dispose();
tlog.Debug(tag, $"PixelBufferGetBuffer END (OK)");
}
public override View Run()
{
var view = new View
{
Layout = new LinearLayout
{
LinearAlignment = LinearLayout.Alignment.Center,
LinearOrientation = LinearLayout.Orientation.Vertical,
}
};
view.UpdateBackgroundColor(Color.FromHex("#618833"));
var test1 = new Button
{
Text = "PixelBuffer Create"
};
view.Add(test1);
var test2 = new Button
{
Text = "NativeImageQueue Create"
};
view.Add(test2);
var label = new Label();
view.Add(label);
test1.Clicked += (s, e) =>
{
Stopwatch stopwatch = Stopwatch.StartNew();
for (int i = 0; i < 1000; i++)
{
using var buffer = new PixelBuffer(500, 500, PixelFormat.BGRA8888);
buffer.GetBuffer();
using var pixelData = PixelBuffer.Convert(buffer);
using var url = pixelData.GenerateUrl();
}
stopwatch.Stop();
label.Text = $"PixelBuffer create time : {stopwatch.ElapsedMilliseconds} ms";
};
test2.Clicked += (s, e) =>
{
Stopwatch stopwatch = Stopwatch.StartNew();
for (int i = 0; i < 1000; i++)
{
using var queue = new NativeImageQueue(500, 500, NativeImageQueue.ColorFormat.RGBA8888);
int width = 0;
int height = 0;
int stride = 0;
var buffer = queue.DequeueBuffer(ref width, ref height, ref stride);
queue.EnqueueBuffer(buffer);
}
stopwatch.Stop();
label.Text = $"NativeImageQueue create time : {stopwatch.ElapsedMilliseconds} ms";
};
return(view);
}
TextureSet CreateTextureSet(RendererParameters textParameters, List <string> embeddedItems)
{
EmbeddedItemInfo[] embeddedItemLayout = new EmbeddedItemInfo[0];
PixelBuffer pixelBuffer = TextUtils.Render(textParameters, ref embeddedItemLayout);
uint dstWidth = pixelBuffer.GetWidth();
uint dstHeight = pixelBuffer.GetHeight();
int index = 0;
int length = embeddedItemLayout.Length;
for (int i = 0; i < length; i++)
{
EmbeddedItemInfo itemLayout = embeddedItemLayout[i];
int width = (int)itemLayout.Size.Width;
int height = (int)itemLayout.Size.Height;
int x = (int)itemLayout.Position.X;
int y = (int)itemLayout.Position.Y;
PixelBuffer itemPixelBuffer = ImageLoading.LoadImageFromFile(embeddedItems[index++]);
if (itemPixelBuffer == null)
{
continue;
}
itemPixelBuffer.Resize((ushort)width, (ushort)height);
itemPixelBuffer.Rotate(itemLayout.Angle);
width = (int)itemPixelBuffer.GetWidth();
height = (int)itemPixelBuffer.GetHeight();
PixelFormat itemPixelFormat = itemPixelBuffer.GetPixelFormat();
// Check if the item is out of the buffer.
if ((x + width < 0) ||
(x > dstWidth) ||
(y < 0) ||
(y - height > dstHeight))
{
// The embedded item is completely out of the buffer.
continue;
}
// Crop if it exceeds the boundaries of the destination buffer.
int layoutX = 0;
int layoutY = 0;
int cropX = 0;
int cropY = 0;
int newWidth = width;
int newHeight = height;
bool crop = false;
if (0 > x)
{
newWidth += x;
cropX = Math.Abs(x);
crop = true;
}
else
{
layoutX = x;
}
if (cropX + newWidth > dstWidth)
{
crop = true;
newWidth -= (int)((cropX + newWidth) - dstWidth);
}
layoutY = y;
if (0 > layoutY)
{
newHeight += layoutY;
cropY = Math.Abs(layoutY);
crop = true;
}
if (cropY + newHeight > dstHeight)
{
crop = true;
newHeight -= (int)((cropY + newHeight) - dstHeight);
}
int uiCropX = cropX;
int uiCropY = cropY;
int uiNewWidth = newWidth;
int uiNewHeight = newHeight;
if (crop)
{
itemPixelBuffer.Crop((ushort)uiCropX, (ushort)uiCropY, (ushort)uiNewWidth, (ushort)uiNewHeight);
}
// Blend the item pixel buffer with the text's color according its blending mode.
if (ColorBlendingMode.Multiply == itemLayout.ColorBlendingMode)
{
PixelBuffer buffer = new PixelBuffer((uint)uiNewWidth, (uint)uiNewHeight, itemPixelFormat);
IntPtr bufferIntPtr = buffer.GetBuffer();
IntPtr itemBufferIntPtr = itemPixelBuffer.GetBuffer();
uint bytesPerPixel = GetBytesPerPixel(itemPixelFormat);
uint size = (uint)(uiNewWidth * uiNewHeight * bytesPerPixel);
unsafe {
byte *bufferPtr = (byte *)bufferIntPtr.ToPointer();
byte *itemBufferPtr = (byte *)itemBufferIntPtr.ToPointer();
for (uint j = 0; j < size; j += bytesPerPixel)
{
*(bufferPtr + 0) = (byte)((*(itemBufferPtr + 0u)) * textParameters.TextColor.R);
*(bufferPtr + 1) = (byte)((*(itemBufferPtr + 1u)) * textParameters.TextColor.G);
*(bufferPtr + 2) = (byte)((*(itemBufferPtr + 2u)) * textParameters.TextColor.B);
*(bufferPtr + 3) = (byte)((*(itemBufferPtr + 3u)) * textParameters.TextColor.A);
itemBufferPtr += bytesPerPixel;
bufferPtr += bytesPerPixel;
}
}
itemPixelBuffer = buffer;
}
TextUtils.UpdateBuffer(itemPixelBuffer, pixelBuffer, (uint)layoutX, (uint)layoutY, true);
}
PixelData pixelData = PixelBuffer.Convert(pixelBuffer);
Texture texture = new Texture(TextureType.TEXTURE_2D,
pixelData.GetPixelFormat(),
pixelData.GetWidth(),
pixelData.GetHeight());
texture.Upload(pixelData);
TextureSet textureSet = new TextureSet();
textureSet.SetTexture(0u, texture);
return(textureSet);
}