public void Texture2DSubImage()
{
float[] pixels = new float[]
{
1, 2,
3, 4
};
int sizeInBytes = pixels.Length * sizeof(float);
Texture2DDescription description = new Texture2DDescription(2, 2, TextureFormat.Red32f, true);
using (GraphicsWindow window = Device.CreateWindow(1, 1))
using (WritePixelBuffer writePixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, sizeInBytes))
using (Texture2D texture = Device.CreateTexture2D(description))
{
//
// Copy from system memory to texture via pixel buffer
//
writePixelBuffer.CopyFromSystemMemory(pixels);
texture.CopyFromBuffer(writePixelBuffer, ImageFormat.Red, ImageDatatype.Float, 1);
//
// Read back pixels
//
using (ReadPixelBuffer readPixelBuffer = texture.CopyToBuffer(ImageFormat.Red, ImageDatatype.Float, 1))
{
float[] readPixels = readPixelBuffer.CopyToSystemMemory <float>();
//
// Verify
//
Assert.AreEqual(sizeInBytes, readPixelBuffer.SizeInBytes);
Assert.AreEqual(pixels[0], readPixels[0]);
Assert.AreEqual(pixels[1], readPixels[1]);
Assert.AreEqual(pixels[2], readPixels[2]);
Assert.AreEqual(pixels[3], readPixels[3]);
Assert.AreEqual(description, texture.Description);
//
// Update sub image
//
float modifiedPixel = 9;
writePixelBuffer.CopyFromSystemMemory(new[] { modifiedPixel });
texture.CopyFromBuffer(writePixelBuffer, 1, 1, 1, 1, ImageFormat.Red, ImageDatatype.Float, 1);
using (ReadPixelBuffer readPixelBuffer2 = texture.CopyToBuffer(ImageFormat.Red, ImageDatatype.Float, 1))
{
float[] readPixels2 = readPixelBuffer2.CopyToSystemMemory <float>();
Assert.AreEqual(sizeInBytes, readPixelBuffer2.SizeInBytes);
Assert.AreEqual(pixels[0], readPixels2[0]);
Assert.AreEqual(pixels[1], readPixels2[1]);
Assert.AreEqual(pixels[2], readPixels2[2]);
Assert.AreEqual(modifiedPixel, readPixels2[3]);
}
}
}
}
public void Texture2DRowAlignment()
{
//
// Create pixel buffer - RGB, 4 byte aligned, 255 is padding
//
byte[] pixels = new byte[]
{
1, 2, 3, 255,
4, 5, 6, 255
};
int sizeInBytes = pixels.Length * sizeof(byte);
using (GraphicsWindow window = Device.CreateWindow(1, 1))
using (WritePixelBuffer writePixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, sizeInBytes))
using (Texture2D texture = Device.CreateTexture2D(new Texture2DDescription(1, 2, TextureFormat.RedGreenBlue8, false)))
{
writePixelBuffer.CopyFromSystemMemory(pixels);
texture.CopyFromBuffer(writePixelBuffer, ImageFormat.RedGreenBlue, ImageDatatype.UnsignedByte);
//
// Read back pixels
//
using (ReadPixelBuffer readPixelBuffer = texture.CopyToBuffer(ImageFormat.RedGreenBlue, ImageDatatype.UnsignedByte, 1))
{
byte[] readPixels = readPixelBuffer.CopyToSystemMemory <byte>();
Assert.AreEqual(1, readPixels[0]);
Assert.AreEqual(2, readPixels[1]);
Assert.AreEqual(3, readPixels[2]);
Assert.AreEqual(4, readPixels[3]);
Assert.AreEqual(5, readPixels[4]);
Assert.AreEqual(6, readPixels[5]);
}
}
}
public void Texture2D()
{
BlittableRGBA[] pixels = new BlittableRGBA[]
{
new BlittableRGBA(Color.Red),
new BlittableRGBA(Color.Green)
};
int sizeInBytes = ArraySizeInBytes.Size(pixels);
Texture2DDescription description = new Texture2DDescription(2, 1, TextureFormat.RedGreenBlueAlpha8, false);
using (GraphicsWindow window = Device.CreateWindow(1, 1))
using (WritePixelBuffer writePixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, sizeInBytes))
using (Texture2D texture = Device.CreateTexture2D(description))
{
writePixelBuffer.CopyFromSystemMemory(pixels);
//
// Create texture with pixel buffer
//
texture.CopyFromBuffer(writePixelBuffer, BlittableRGBA.Format, BlittableRGBA.Datatype);
//
// Read back pixels
//
using (ReadPixelBuffer readPixelBuffer = texture.CopyToBuffer(BlittableRGBA.Format, BlittableRGBA.Datatype))
{
BlittableRGBA[] readPixels = readPixelBuffer.CopyToSystemMemory <BlittableRGBA>();
Assert.AreEqual(sizeInBytes, readPixelBuffer.SizeInBytes);
Assert.AreEqual(pixels[0], readPixels[0]);
Assert.AreEqual(pixels[1], readPixels[1]);
Assert.AreEqual(description, texture.Description);
}
}
}
public void Texture2DAlignment()
{
byte[] pixels = new byte[]
{
1, 2, 3, 4, 4, 6,
7, 8, 9, 10, 11, 12
};
int sizeInBytes = pixels.Length * sizeof(byte);
Texture2DDescription description = new Texture2DDescription(2, 2, TextureFormat.RedGreenBlue8, false);
using (GraphicsWindow window = Device.CreateWindow(1, 1))
using (WritePixelBuffer writePixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, sizeInBytes))
using (Texture2D texture = Device.CreateTexture2D(description))
{
//
// Copy from system memory to texture via pixel buffer
//
writePixelBuffer.CopyFromSystemMemory(pixels);
texture.CopyFromBuffer(writePixelBuffer, ImageFormat.RedGreenBlue, ImageDatatype.UnsignedByte, 1);
//
// Read back pixels
//
using (ReadPixelBuffer readPixelBuffer = texture.CopyToBuffer(ImageFormat.RedGreenBlue, ImageDatatype.UnsignedByte, 1))
{
byte[] readPixels = readPixelBuffer.CopyToSystemMemory <byte>();
//
// Verify
//
Assert.AreEqual(sizeInBytes, readPixelBuffer.SizeInBytes);
for (int i = 0; i < pixels.Length; ++i)
{
Assert.AreEqual(pixels[i], readPixels[i]);
}
}
Assert.AreEqual(description, texture.Description);
}
}
