public Texture2DGL3x(Texture2DDescription description, TextureTarget textureTarget)
{
if (description.Width <= 0)
{
throw new ArgumentOutOfRangeException("description.Width", "description.Width must be greater than zero.");
}
if (description.Height <= 0)
{
throw new ArgumentOutOfRangeException("description.Height", "description.Height must be greater than zero.");
}
if (description.GenerateMipmaps)
{
if (textureTarget == TextureTarget.TextureRectangle)
{
throw new ArgumentException("description.GenerateMipmaps cannot be true for texture rectangles.", "description");
}
if (!TextureUtility.IsPowerOfTwo(Convert.ToUInt32(description.Width)))
{
throw new ArgumentException("When description.GenerateMipmaps is true, the width must be a power of two.", "description");
}
if (!TextureUtility.IsPowerOfTwo(Convert.ToUInt32(description.Height)))
{
throw new ArgumentException("When description.GenerateMipmaps is true, the height must be a power of two.", "description");
}
}
_name = new TextureNameGL3x();
_target = textureTarget;
_description = description;
_lastTextureUnit = OpenTKTextureUnit.Texture0 + (Device.NumberOfTextureUnits - 1);
//
// TexImage2D is just used to allocate the texture so a PBO can't be bound.
//
WritePixelBufferGL3x.UnBind();
BindToLastTextureUnit();
GL.TexImage2D(_target, 0,
TypeConverterGL3x.To(description.TextureFormat),
description.Width,
description.Height,
0,
TypeConverterGL3x.TextureToPixelFormat(description.TextureFormat),
TypeConverterGL3x.TextureToPixelType(description.TextureFormat),
new IntPtr());
//
// Default sampler, compatiable when attaching a non-mimapped
// texture to a frame buffer object.
//
ApplySampler(Device.TextureSamplers.LinearClamp);
GC.AddMemoryPressure(description.ApproximateSizeInBytes);
}
public override void CopyFromBuffer(
WritePixelBuffer pixelBuffer,
int xOffset,
int yOffset,
int width,
int height,
ImageFormat format,
ImageDatatype dataType,
int rowAlignment)
{
if (pixelBuffer.SizeInBytes < TextureUtility.RequiredSizeInBytes(
width, height, format, dataType, rowAlignment))
{
throw new ArgumentException("Pixel buffer is not big enough for provided width, height, format, and datatype.");
}
if (xOffset < 0)
{
throw new ArgumentOutOfRangeException("xOffset", "xOffset must be greater than or equal to zero.");
}
if (yOffset < 0)
{
throw new ArgumentOutOfRangeException("yOffset", "yOffset must be greater than or equal to zero.");
}
if (xOffset + width > _description.Width)
{
throw new ArgumentOutOfRangeException("xOffset + width must be less than or equal to Description.Width");
}
if (yOffset + height > _description.Height)
{
throw new ArgumentOutOfRangeException("yOffset + height must be less than or equal to Description.Height");
}
VerifyRowAlignment(rowAlignment);
WritePixelBufferGL3x bufferObjectGL = (WritePixelBufferGL3x)pixelBuffer;
bufferObjectGL.Bind();
BindToLastTextureUnit();
GL.PixelStore(PixelStoreParameter.UnpackAlignment, rowAlignment);
GL.TexSubImage2D(_target, 0,
xOffset,
yOffset,
width,
height,
TypeConverterGL3x.To(format),
TypeConverterGL3x.To(dataType),
new IntPtr());
GenerateMipmaps();
}