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);
}
}
}
/// <summary>
/// Creates a 1x1 RGBA8 texture
/// </summary>
public static Texture2D CreateTexture(BlittableRGBA rgba)
{
Texture2DDescription description = new Texture2DDescription(1, 1, TextureFormat.RedGreenBlueAlpha8, false);
Texture2D texture = Device.CreateTexture2D(description);
BlittableRGBA[] pixels = new BlittableRGBA[] { rgba };
using (WritePixelBuffer writePixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, ArraySizeInBytes.Size(pixels)))
{
writePixelBuffer.CopyFromSystemMemory(pixels);
texture.CopyFromBuffer(writePixelBuffer, ImageFormat.RedGreenBlueAlpha, ImageDatatype.UnsignedByte);
}
return(texture);
}
/// <summary>
/// Creates a 1x1 RGBA8 texture
/// </summary>
public static Texture2D CreateTexture(BlittableRGBA rgba)
{
Texture2DDescription description = new Texture2DDescription(1, 1, TextureFormat.RedGreenBlueAlpha8, false);
Texture2D texture = Device.CreateTexture2D(description);
BlittableRGBA[] pixels = new BlittableRGBA[] { rgba };
using (WritePixelBuffer writePixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, ArraySizeInBytes.Size(pixels)))
{
writePixelBuffer.CopyFromSystemMemory(pixels);
texture.CopyFromBuffer(writePixelBuffer, ImageFormat.RedGreenBlueAlpha, ImageDatatype.UnsignedByte);
}
return texture;
}
private void UpdateAll(Context context)
{
//
// Since billboards were added or removed, all billboards are
// rewritten so dirty billboards are automatically cleaned.
//
_dirtyBillboards.Clear();
//
// Create vertex array with appropriately sized vertex buffers
//
DisposeVertexArray();
if (_billboards.Count != 0)
{
CreateVertexArray(context);
//
// Write vertex buffers
//
Vector3F[] positions = new Vector3F[_billboards.Count];
Vector4H[] textureCoordinates = new Vector4H[_billboards.Count];
BlittableRGBA[] colors = new BlittableRGBA[_billboards.Count];
byte[] origins = new byte[_billboards.Count];
Vector2H[] pixelOffets = new Vector2H[_billboards.Count];
for (int i = 0; i < _billboards.Count; ++i)
{
Billboard b = _billboards[i];
positions[i] = b.Position.ToVector3F();
textureCoordinates[i] = new Vector4H(
b.TextureCoordinates.LowerLeft.X, b.TextureCoordinates.LowerLeft.Y,
b.TextureCoordinates.UpperRight.X, b.TextureCoordinates.UpperRight.Y);
colors[i] = new BlittableRGBA(b.Color);
origins[i] = BillboardOrigin(b);
pixelOffets[i] = b.PixelOffset;
b.VertexBufferOffset = i;
b.Dirty = false;
}
CopyBillboardsFromSystemMemory(positions, textureCoordinates, colors, origins, pixelOffets, 0, _billboards.Count);
_rewriteBillboards = false;
}
}
private void UpdateDirty()
{
// PERFORMANCE: Sort by buffer offset
// PERFORMANCE: Map buffer range
// PERFORMANCE: Round robin multiple buffers
Vector3F[] positions = new Vector3F[_dirtyBillboards.Count];
Vector4H[] textureCoordinates = new Vector4H[_dirtyBillboards.Count];
BlittableRGBA[] colors = new BlittableRGBA[_dirtyBillboards.Count];
byte[] origins = new byte[_dirtyBillboards.Count];
Vector2H[] pixelOffets = new Vector2H[_dirtyBillboards.Count];
int bufferOffset = _dirtyBillboards[0].VertexBufferOffset;
int previousBufferOffset = bufferOffset - 1;
int length = 0;
for (int i = 0; i < _dirtyBillboards.Count; ++i)
{
Billboard b = _dirtyBillboards[i];
if (previousBufferOffset != b.VertexBufferOffset - 1)
{
CopyBillboardsFromSystemMemory(positions, textureCoordinates, colors, origins, pixelOffets, bufferOffset, length);
bufferOffset = b.VertexBufferOffset;
length = 0;
}
positions[length] = b.Position.ToVector3F();
textureCoordinates[length] = new Vector4H(
b.TextureCoordinates.LowerLeft.X, b.TextureCoordinates.LowerLeft.Y,
b.TextureCoordinates.UpperRight.X, b.TextureCoordinates.UpperRight.Y);
colors[length] = new BlittableRGBA(b.Color);
origins[length] = BillboardOrigin(b);
pixelOffets[length] = b.PixelOffset;
++length;
previousBufferOffset = b.VertexBufferOffset;
b.Dirty = false;
}
CopyBillboardsFromSystemMemory(positions, textureCoordinates, colors, origins, pixelOffets, bufferOffset, length);
_dirtyBillboards.Clear();
}
public TextureFactory(Context context, BlittableRGBA rgba)
{
_context = context;
_rgba = rgba;
}
public void WritePixelBuffer()
{
BlittableRGBA[] pixels = new BlittableRGBA[]
{
new BlittableRGBA(Color.Red),
new BlittableRGBA(Color.Green),
new BlittableRGBA(Color.Blue),
new BlittableRGBA(Color.White)
};
int sizeInBytes = ArraySizeInBytes.Size(pixels);
using (GraphicsWindow window = Device.CreateWindow(1, 1))
using (WritePixelBuffer pixelBuffer = Device.CreateWritePixelBuffer(PixelBufferHint.Stream, sizeInBytes))
{
//
// Verify creating pixel buffer
//
Assert.IsNotNull(pixelBuffer);
Assert.AreEqual(PixelBufferHint.Stream, pixelBuffer.UsageHint);
Assert.AreEqual(sizeInBytes, pixelBuffer.SizeInBytes);
//
// Verify copying entire buffer between system memory and pixel buffer
//
pixelBuffer.CopyFromSystemMemory(pixels);
BlittableRGBA[] pixels2 = pixelBuffer.CopyToSystemMemory<BlittableRGBA>(0, pixelBuffer.SizeInBytes);
Assert.AreEqual(pixels[0], pixels2[0]);
Assert.AreEqual(pixels[1], pixels2[1]);
Assert.AreEqual(pixels[2], pixels2[2]);
//
// Verify modiying a subset of the vertex buffer
//
BlittableRGBA modifiedPixel = new BlittableRGBA(Color.Black);
pixelBuffer.CopyFromSystemMemory(new[] { modifiedPixel }, SizeInBytes<BlittableRGBA>.Value);
BlittableRGBA[] pixels3 = pixelBuffer.CopyToSystemMemory<BlittableRGBA>(0, pixelBuffer.SizeInBytes);
Assert.AreEqual(pixels[0], pixels3[0]);
Assert.AreEqual(modifiedPixel, pixels3[1]);
Assert.AreEqual(pixels[2], pixels3[2]);
}
}
