/// <summary>
/// Determine if a buffer-to-texture region covers the entirety of a texture.
/// </summary>
/// <param name="tex">Texture to compare</param>
/// <param name="linear">True if the texture is linear, false if block linear</param>
/// <param name="bpp">Texture bytes per pixel</param>
/// <param name="stride">Texture stride</param>
/// <param name="xCount">Number of pixels to be copied</param>
/// <param name="yCount">Number of lines to be copied</param>
/// <returns></returns>
private static bool IsTextureCopyComplete(DmaTexture tex, bool linear, int bpp, int stride, int xCount, int yCount)
{
if (linear)
{
// If the stride is negative, the texture has to be flipped, so
// the fast copy is not trivial, use the slow path.
if (stride <= 0)
{
return(false);
}
int alignWidth = Constants.StrideAlignment / bpp;
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
stride / bpp == BitUtils.AlignUp(xCount, alignWidth));
}
else
{
int alignWidth = Constants.GobAlignment / bpp;
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
tex.Width == BitUtils.AlignUp(xCount, alignWidth) &&
tex.Height == yCount);
}
}
/// <summary>
/// Determine if a buffer-to-texture region covers the entirety of a texture.
/// </summary>
/// <param name="tex">Texture to compare</param>
/// <param name="linear">True if the texture is linear, false if block linear</param>
/// <param name="bpp">Texture bytes per pixel</param>
/// <param name="stride">Texture stride</param>
/// <param name="xCount">Number of pixels to be copied</param>
/// <param name="yCount">Number of lines to be copied</param>
/// <returns></returns>
private static bool IsTextureCopyComplete(DmaTexture tex, bool linear, int bpp, int stride, int xCount, int yCount)
{
if (linear)
{
int alignWidth = Constants.StrideAlignment / bpp;
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
stride / bpp == BitUtils.AlignUp(xCount, alignWidth));
}
else
{
int alignWidth = Constants.GobAlignment / bpp;
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
tex.Width == BitUtils.AlignUp(xCount, alignWidth) &&
tex.Height == yCount);
}
}
