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/*
* www.javagl.de - JglTF
*
* Copyright 2015-2016 Marco Hutter - http://www.javagl.de
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package de.javagl.jgltf.model.v1;
import java.io.IOException;
import java.nio.ByteBuffer;
import javax.imageio.ImageReader;
import de.javagl.jgltf.impl.v1.Buffer;
import de.javagl.jgltf.impl.v1.BufferView;
import de.javagl.jgltf.impl.v1.GlTFProperty;
import de.javagl.jgltf.impl.v1.Image;
import de.javagl.jgltf.impl.v1.Shader;
import de.javagl.jgltf.model.GltfException;
import de.javagl.jgltf.model.io.ImageReaders;
/**
* Utility methods related to the binary glTF extension of glTF 1.0
*/
public class BinaryGltfV1
{
/**
* The name of the KHR_binary_glTF extension
*/
private static final String KHRONOS_BINARY_GLTF_EXTENSION_NAME =
"KHR_binary_glTF";
/**
* The unique, universal buffer ID for the binary data that is stored
* in a binary glTF file
*/
private static final String BINARY_GLTF_BUFFER_ID = "binary_glTF";
/**
* Returns whether the given {@link GlTFProperty} has the
* "KHR_binary_glTF" extension. This is applicable
* to {@link Image} and {@link Shader} objects that may contain
* an extension object with a {@link BufferView} ID instead of
* a URI. The {@link BufferView} ID may be obtained with
* {@link BinaryGltfV1#getBinaryGltfBufferViewId(GlTFProperty)}.
*
* @param gltfProperty The {@link GlTFProperty}
* @return Whether the extension exists
*/
public static boolean hasBinaryGltfExtension(GlTFProperty gltfProperty)
{
return GltfExtensionsV1.hasExtension(gltfProperty,
KHRONOS_BINARY_GLTF_EXTENSION_NAME);
}
/**
* Returns the value of the "bufferView" property in
* the "KHR_binary_glTF" extension object of the
* given {@link GlTFProperty}, or null if either the
* extension object or the property does not exist.
*
* @param gltfProperty The {@link GlTFProperty}
* @return The property value
*/
static String getBinaryGltfBufferViewId(GlTFProperty gltfProperty)
{
return GltfExtensionsV1.getExtensionPropertyValueAsString(
gltfProperty, KHRONOS_BINARY_GLTF_EXTENSION_NAME, "bufferView");
}
/**
* Set the value of the "bufferView" property in
* the "KHR_binary_glTF" extension object of the
* given {@link GlTFProperty}. If no (or an invalid) extension
* object already existed, it will be created or overwritten,
* respectively.
*
* @param gltfProperty The {@link GlTFProperty}
* @param bufferViewId The {@link BufferView} ID
*/
public static void setBinaryGltfBufferViewId(
GlTFProperty gltfProperty, String bufferViewId)
{
GltfExtensionsV1.setExtensionPropertyValue(
gltfProperty, KHRONOS_BINARY_GLTF_EXTENSION_NAME,
"bufferView", bufferViewId);
}
/**
* Set the properties for the given {@link Image} that is stored
* as a "KHR_binary_glTF" image. These properties
* are
*
*
The image width
*
The image height
*
The image mimeType
*
* (Note that the buffer view ID is set explicitly with
* {@link #setBinaryGltfBufferViewId(GlTFProperty, String)})
*
* @param image The image
* @param imageData The raw image data
* @throws GltfException If the image data cannot be analyzed to derive
* the required information
*/
public static void setBinaryGltfImageProperties(
Image image, ByteBuffer imageData)
{
ImageReader imageReader = null;
try
{
imageReader = ImageReaders.findImageReader(imageData);
int width = imageReader.getWidth(0);
int height = imageReader.getHeight(0);
String mimeType = "image/" + imageReader.getFormatName();
GltfExtensionsV1.setExtensionPropertyValue(image,
KHRONOS_BINARY_GLTF_EXTENSION_NAME, "width", width);
GltfExtensionsV1.setExtensionPropertyValue(image,
KHRONOS_BINARY_GLTF_EXTENSION_NAME, "height", height);
GltfExtensionsV1.setExtensionPropertyValue(image,
KHRONOS_BINARY_GLTF_EXTENSION_NAME, "mimeType", mimeType);
}
catch (IOException e)
{
throw new GltfException(
"Could not derive image properties for binary glTF", e);
}
finally
{
if (imageReader != null)
{
imageReader.dispose();
}
}
}
/**
* Returns the name of the Khronos binary glTF extension
* ("KHR_binary_glTF")
*
* @return The name of the Khronos binary glTF extension
*/
public static String getBinaryGltfExtensionName()
{
return KHRONOS_BINARY_GLTF_EXTENSION_NAME;
}
/**
* Returns unique ID of the binary glTF {@link Buffer}
* ("binary_glTF")
*
* @return The binary glTF {@link Buffer} ID
*/
public static String getBinaryGltfBufferId()
{
return BINARY_GLTF_BUFFER_ID;
}
/**
* Returns whether the given ID is the unique ID of the binary glTF
* {@link Buffer} ("binary_glTF")
*
* @param id The ID
* @return Whether the given ID is the binary glTF {@link Buffer} ID
*/
public static boolean isBinaryGltfBufferId(String id)
{
return BINARY_GLTF_BUFFER_ID.equals(id);
}
/**
* Private constructor to prevent instantiation
*/
private BinaryGltfV1()
{
// Private constructor to prevent instantiation
}
}
