private GCHandle _ConvertTextureToGrayscaleBytes(AugmentedImageSrc imageSrc)
{
byte[] grayscaleBytes = null;
if (imageSrc.Format == TextureFormat.RGB24 ||
imageSrc.Format == TextureFormat.RGBA32)
{
Color[] pixels = imageSrc.Pixels;
grayscaleBytes = new byte[pixels.Length];
for (int i = 0; i < imageSrc.Height; i++)
{
int widthDelta = i * imageSrc.Width;
for (int j = 0; j < imageSrc.Width; j++)
{
int pixelIndex = ((imageSrc.Height - 1 - i) * imageSrc.Width) + j;
grayscaleBytes[widthDelta + j] =
(byte)((
(0.213 * pixels[pixelIndex].r) +
(0.715 * pixels[pixelIndex].g) +
(0.072 * pixels[pixelIndex].b)) * 255);
}
}
}
else
{
Debug.LogError("Unsupported texture format " + imageSrc.Format);
}
return(GCHandle.Alloc(grayscaleBytes, GCHandleType.Pinned));
}
public int AddAugmentedImageAtRuntime(IntPtr augmentedImageDatabaseHandle, string name,
AugmentedImageSrc imageSrc, float width)
{
int outIndex = -1;
if (InstantPreviewManager.IsProvidingPlatform)
{
InstantPreviewManager.LogLimitedSupportMessage(
"add images to Augmented Image database");
return(outIndex);
}
GCHandle grayscaleBytesHandle = _ConvertTextureToGrayscaleBytes(imageSrc);
if (grayscaleBytesHandle.AddrOfPinnedObject() == IntPtr.Zero)
{
return(-1);
}
ApiArStatus status;
if (width > 0)
{
status = ExternApi.ArAugmentedImageDatabase_addImageWithPhysicalSize(
m_NativeSession.SessionHandle, augmentedImageDatabaseHandle, name,
grayscaleBytesHandle.AddrOfPinnedObject(), imageSrc.Width,
imageSrc.Height, imageSrc.Width, width, ref outIndex);
}
else
{
status = ExternApi.ArAugmentedImageDatabase_addImage(
m_NativeSession.SessionHandle, augmentedImageDatabaseHandle, name,
grayscaleBytesHandle.AddrOfPinnedObject(), imageSrc.Width,
imageSrc.Height, imageSrc.Width, ref outIndex);
}
if (grayscaleBytesHandle.IsAllocated)
{
grayscaleBytesHandle.Free();
}
if (status != ApiArStatus.Success)
{
Debug.LogWarningFormat(
"Failed to add aumented image at runtime with status {0}", status);
return(-1);
}
return(outIndex);
}
