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jMonkeyEngine is a 3-D game engine for adventurous Java developers
/*
* Copyright (c) 2009-2021 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.texture;
import com.jme3.asset.AssetKey;
import com.jme3.asset.AssetNotFoundException;
import com.jme3.asset.CloneableSmartAsset;
import com.jme3.asset.TextureKey;
import com.jme3.export.*;
import com.jme3.util.PlaceholderAssets;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Texture defines a texture object to be used to display an
* image on a piece of geometry. The image to be displayed is defined by the
* Image class. All attributes required for texture mapping are
* contained within this class. This includes mipmapping if desired,
* magnificationFilter options, apply options and correction options. Default
* values are as follows: minificationFilter - NearestNeighborNoMipMaps,
* magnificationFilter - NearestNeighbor, wrap - EdgeClamp on S,T and R, apply -
* Modulate, environment - None.
*
* @see com.jme3.texture.Image
* @author Mark Powell
* @author Joshua Slack
* @version $Id: Texture.java 4131 2009-03-19 20:15:28Z blaine.dev $
*/
public abstract class Texture implements CloneableSmartAsset, Savable, Cloneable {
public enum Type {
/**
* Two dimensional texture (default). A rectangle.
*/
TwoDimensional,
/**
* An array of two-dimensional textures.
*/
TwoDimensionalArray,
/**
* Three-dimensional texture. (A cube)
*/
ThreeDimensional,
/**
* A set of 6 TwoDimensional textures arranged as faces of a cube facing
* inwards.
*/
CubeMap;
}
public enum MinFilter {
/**
* Nearest neighbor interpolation is the fastest and crudest filtering
* method - it simply uses the color of the texel closest to the pixel
* center for the pixel color. While fast, this results in aliasing and
* shimmering during minification. (GL equivalent: GL_NEAREST)
*/
NearestNoMipMaps(false),
/**
* In this method the four nearest texels to the pixel center are
* sampled (at texture level 0), and their colors are combined by
* weighted averages. Though smoother, without mipmaps it suffers the
* same aliasing and shimmering problems as nearest
* NearestNeighborNoMipMaps. (GL equivalent: GL_LINEAR)
*/
BilinearNoMipMaps(false),
/**
* Same as NearestNeighborNoMipMaps except that instead of using samples
* from texture level 0, the closest mipmap level is chosen based on
* distance. This reduces the aliasing and shimmering significantly, but
* does not help with blockiness. (GL equivalent:
* GL_NEAREST_MIPMAP_NEAREST)
*/
NearestNearestMipMap(true),
/**
* Same as BilinearNoMipMaps except that instead of using samples from
* texture level 0, the closest mipmap level is chosen based on
* distance. By using mipmapping we avoid the aliasing and shimmering
* problems of BilinearNoMipMaps. (GL equivalent:
* GL_LINEAR_MIPMAP_NEAREST)
*/
BilinearNearestMipMap(true),
/**
* Similar to NearestNeighborNoMipMaps except that instead of using
* samples from texture level 0, a sample is chosen from each of the
* closest (by distance) two mipmap levels. A weighted average of these
* two samples is returned. (GL equivalent: GL_NEAREST_MIPMAP_LINEAR)
*/
NearestLinearMipMap(true),
/**
* Trilinear filtering is a remedy to a common artifact seen in
* mipmapped bilinearly filtered images: an abrupt and very noticeable
* change in quality at boundaries where the renderer switches from one
* mipmap level to the next. Trilinear filtering solves this by doing a
* texture lookup and bilinear filtering on the two closest mipmap
* levels (one higher and one lower quality), and then linearly
* interpolating the results. This results in a smooth degradation of
* texture quality as distance from the viewer increases, rather than a
* series of sudden drops. Of course, closer than Level 0 there is only
* one mipmap level available, and the algorithm reverts to bilinear
* filtering (GL equivalent: GL_LINEAR_MIPMAP_LINEAR)
*/
Trilinear(true);
private final boolean usesMipMapLevels;
private MinFilter(boolean usesMipMapLevels) {
this.usesMipMapLevels = usesMipMapLevels;
}
public boolean usesMipMapLevels() {
return usesMipMapLevels;
}
}
public enum MagFilter {
/**
* Nearest neighbor interpolation is the fastest and crudest filtering
* mode - it simply uses the color of the texel closest to the pixel
* center for the pixel color. While fast, this results in texture
* 'blockiness' during magnification. (GL equivalent: GL_NEAREST)
*/
Nearest,
/**
* In this mode the four nearest texels to the pixel center are sampled
* (at the closest mipmap level), and their colors are combined by
* weighted average according to distance. This removes the 'blockiness'
* seen during magnification, as there is now a smooth gradient of color
* change from one texel to the next, instead of an abrupt jump as the
* pixel center crosses the texel boundary. (GL equivalent: GL_LINEAR)
*/
Bilinear;
}
public enum WrapMode {
/**
* Only the fractional portion of the coordinate is considered.
*/
Repeat,
/**
* Only the fractional portion of the coordinate is considered, but if
* the integer portion is odd, we'll use 1 - the fractional portion.
* (Introduced around OpenGL1.4) Falls back on Repeat if not supported.
*/
MirroredRepeat,
/**
* coordinate will be clamped to [0,1]
*
* @deprecated Not supported by OpenGL 3
*/
@Deprecated
Clamp,
/**
* mirrors and clamps the texture coordinate, where mirroring and
* clamping a value f computes:
* mirrorClamp(f) = min(1, max(1/(2*N),
* abs(f))) where N
* is the size of the one-, two-, or three-dimensional texture image in
* the direction of wrapping. (Introduced after OpenGL1.4) Falls back on
* Clamp if not supported.
*
* @deprecated Not supported by OpenGL 3
*/
@Deprecated
MirrorClamp,
/**
* coordinate will be clamped to the range [-1/(2N), 1 + 1/(2N)] where N
* is the size of the texture in the direction of clamping. Falls back
* on Clamp if not supported.
*
* @deprecated Not supported by OpenGL 3 or OpenGL ES 2
*/
@Deprecated
BorderClamp,
/**
* Wrap mode MIRROR_CLAMP_TO_BORDER_EXT mirrors and clamps to border the
* texture coordinate, where mirroring and clamping to border a value f
* computes:
* mirrorClampToBorder(f) = min(1+1/(2*N), max(1/(2*N), abs(f)))
* where N is the size of the one-, two-, or three-dimensional texture
* image in the direction of wrapping. (Introduced after OpenGL1.4)
* Falls back on BorderClamp if not supported.
*
* @deprecated Not supported by OpenGL 3
*/
@Deprecated
MirrorBorderClamp,
/**
* coordinate will be clamped to the range [1/(2N), 1 - 1/(2N)] where N
* is the size of the texture in the direction of clamping. Falls back
* on Clamp if not supported.
*/
EdgeClamp,
/**
* mirrors and clamps to edge the texture coordinate, where mirroring
* and clamping to edge a value f computes:
* mirrorClampToEdge(f) = min(1-1/(2*N), max(1/(2*N), abs(f)))
* where N is the size of the one-, two-, or three-dimensional texture
* image in the direction of wrapping. (Introduced after OpenGL1.4)
* Falls back on EdgeClamp if not supported.
*
* @deprecated Not supported by OpenGL 3
*/
@Deprecated
MirrorEdgeClamp;
}
public enum WrapAxis {
/**
* S wrapping (u or "horizontal" wrap)
*/
S,
/**
* T wrapping (v or "vertical" wrap)
*/
T,
/**
* R wrapping (w or "depth" wrap)
*/
R;
}
/**
* If this texture is a depth texture (the format is Depth*) then
* this value may be used to compare the texture depth to the R texture
* coordinate.
*/
public enum ShadowCompareMode {
/**
* Shadow comparison mode is disabled.
* Texturing is done normally.
*/
Off,
/**
* {@code
* Compares the 3rd texture coordinate R to the value
* in this depth texture. If R <= texture value then result is 1.0,
* otherwise, result is 0.0. If filtering is set to bilinear or trilinear
* the implementation may sample the texture multiple times to provide
* smoother results in the range [0, 1].}
*/
LessOrEqual,
/**
* {@code
* Compares the 3rd texture coordinate R to the value
* in this depth texture. If R >= texture value then result is 1.0,
* otherwise, result is 0.0. If filtering is set to bilinear or trilinear
* the implementation may sample the texture multiple times to provide
* smoother results in the range [0, 1].}
*/
GreaterOrEqual
}
/**
* The name of the texture (if loaded as a resource).
*/
private String name = null;
/**
* The image stored in the texture
*/
private Image image = null;
/**
* The texture key allows to reload a texture from a file
* if needed.
*/
private TextureKey key = null;
private MinFilter minificationFilter = MinFilter.BilinearNoMipMaps;
private MagFilter magnificationFilter = MagFilter.Bilinear;
private ShadowCompareMode shadowCompareMode = ShadowCompareMode.Off;
private int anisotropicFilter;
/**
* @return A cloned Texture object.
*/
@Override
public Texture clone(){
try {
return (Texture) super.clone();
} catch (CloneNotSupportedException ex) {
throw new AssertionError();
}
}
/**
* Constructor instantiates a new Texture object with default
* attributes.
*/
public Texture() {
}
/**
* @return the MinificationFilterMode of this texture.
*/
public MinFilter getMinFilter() {
return minificationFilter;
}
/**
* @param minificationFilter
* the new MinificationFilterMode for this texture.
* @throws IllegalArgumentException
* if minificationFilter is null
*/
public void setMinFilter(MinFilter minificationFilter) {
if (minificationFilter == null) {
throw new IllegalArgumentException(
"minificationFilter can not be null.");
}
this.minificationFilter = minificationFilter;
if (minificationFilter.usesMipMapLevels() && image != null && !image.isGeneratedMipmapsRequired() && !image.hasMipmaps()) {
image.setNeedGeneratedMipmaps();
}
}
/**
* @return the MagnificationFilterMode of this texture.
*/
public MagFilter getMagFilter() {
return magnificationFilter;
}
/**
* @param magnificationFilter
* the new MagnificationFilter for this texture.
* @throws IllegalArgumentException
* if magnificationFilter is null
*/
public void setMagFilter(MagFilter magnificationFilter) {
if (magnificationFilter == null) {
throw new IllegalArgumentException(
"magnificationFilter can not be null.");
}
this.magnificationFilter = magnificationFilter;
}
/**
* @return The ShadowCompareMode of this texture.
* @see ShadowCompareMode
*/
public ShadowCompareMode getShadowCompareMode(){
return shadowCompareMode;
}
/**
* @param compareMode
* the new ShadowCompareMode for this texture.
* @throws IllegalArgumentException
* if compareMode is null
* @see ShadowCompareMode
*/
public void setShadowCompareMode(ShadowCompareMode compareMode){
if (compareMode == null){
throw new IllegalArgumentException(
"compareMode can not be null.");
}
this.shadowCompareMode = compareMode;
}
/**
* setImage sets the image object that defines the texture.
*
* @param image
* the image that defines the texture.
*/
public void setImage(Image image) {
this.image = image;
// Test if mipmap generation required.
setMinFilter(getMinFilter());
}
/**
* @param key The texture key that was used to load this texture
*/
@Override
public void setKey(AssetKey key){
this.key = (TextureKey) key;
}
@Override
public AssetKey getKey(){
return this.key;
}
/**
* getImage returns the image data that makes up this
* texture. If no image data has been set, this will return null.
*
* @return the image data that makes up the texture.
*/
public Image getImage() {
return image;
}
/**
* setWrap sets the wrap mode of this texture for a
* particular axis.
*
* @param axis
* the texture axis to apply the wrap mode to.
* @param mode
* the wrap mode for the given axis of the texture.
* @throws IllegalArgumentException
* if axis or mode are null or invalid for this type of texture
*/
public abstract void setWrap(WrapAxis axis, WrapMode mode);
/**
* setWrap sets the wrap mode of this texture for all axis.
*
* @param mode
* the wrap mode for the given axis of the texture.
* @throws IllegalArgumentException
* if mode is null or invalid for this type of texture
*/
public abstract void setWrap(WrapMode mode);
/**
* getWrap returns the wrap mode for a given coordinate axis
* on this texture.
*
* @param axis
* the axis to return for
* @return the wrap mode of the texture.
* @throws IllegalArgumentException
* if axis is null or invalid for this type of texture
*/
public abstract WrapMode getWrap(WrapAxis axis);
public abstract Type getType();
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
/**
* @return the anisotropic filtering level for this texture. Default value
* is 0 (use value from config),
* 1 means 1x (no anisotropy), 2 means x2, 4 is x4, etc.
*/
public int getAnisotropicFilter() {
return anisotropicFilter;
}
/**
* @param level
* the anisotropic filtering level for this texture.
*/
public void setAnisotropicFilter(int level) {
anisotropicFilter = Math.max(0, level);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(getClass().getSimpleName());
sb.append("[name=").append(name);
if (image != null) {
sb.append(", image=").append(image.toString());
}
sb.append("]");
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Texture other = (Texture) obj;
// NOTE: Since images are generally considered unique assets in jME3,
// using the image's equals() implementation is not necessary here
// (would be too slow)
if (this.image != other.image) {
return false;
}
if (this.minificationFilter != other.minificationFilter) {
return false;
}
if (this.magnificationFilter != other.magnificationFilter) {
return false;
}
if (this.shadowCompareMode != other.shadowCompareMode) {
return false;
}
if (this.anisotropicFilter != other.anisotropicFilter) {
return false;
}
return true;
}
@Override
public int hashCode() {
int hash = 5;
// NOTE: Since images are generally considered unique assets in jME3,
// using the image's hashCode() implementation is not necessary here
// (would be too slow)
hash = 67 * hash + (this.image != null ? System.identityHashCode(this.image) : 0);
hash = 67 * hash + (this.minificationFilter != null ? this.minificationFilter.hashCode() : 0);
hash = 67 * hash + (this.magnificationFilter != null ? this.magnificationFilter.hashCode() : 0);
hash = 67 * hash + (this.shadowCompareMode != null ? this.shadowCompareMode.hashCode() : 0);
hash = 67 * hash + this.anisotropicFilter;
return hash;
}
/** Retrieve a basic clone of this Texture (ie, clone everything but the
* image data, which is shared)
*
* @param rVal storage for the clone (not null, modified)
* @return Texture
*
* @deprecated Use {@link Texture#clone()} instead.
*/
@Deprecated
public Texture createSimpleClone(Texture rVal) {
rVal.setMinFilter(minificationFilter);
rVal.setMagFilter(magnificationFilter);
rVal.setShadowCompareMode(shadowCompareMode);
rVal.setAnisotropicFilter(anisotropicFilter);
rVal.setImage(image); // NOT CLONED.
rVal.setKey(key);
rVal.setName(name);
return rVal;
}
/**
* @return a new Texture
* @deprecated Use {@link Texture#clone()} instead.
*/
@Deprecated
public abstract Texture createSimpleClone();
@Override
public void write(JmeExporter e) throws IOException {
OutputCapsule capsule = e.getCapsule(this);
capsule.write(name, "name", null);
if (key == null){
// no texture key is set, try to save image instead then
capsule.write(image, "image", null);
}else{
capsule.write(key, "key", null);
}
capsule.write(anisotropicFilter, "anisotropicFilter", 1);
capsule.write(minificationFilter, "minificationFilter",
MinFilter.BilinearNoMipMaps);
capsule.write(magnificationFilter, "magnificationFilter",
MagFilter.Bilinear);
}
@Override
public void read(JmeImporter importer) throws IOException {
InputCapsule capsule = importer.getCapsule(this);
name = capsule.readString("name", null);
key = (TextureKey) capsule.readSavable("key", null);
// load texture from key, if available
if (key != null) {
// key is available, so try the texture from there.
try {
Texture loadedTex = importer.getAssetManager().loadTexture(key);
image = loadedTex.getImage();
} catch (AssetNotFoundException ex){
Logger.getLogger(Texture.class.getName()).log(Level.SEVERE, "Cannot locate texture {0}", key);
image = PlaceholderAssets.getPlaceholderImage(importer.getAssetManager());
}
}else{
// no key is set on the texture. Attempt to load an embedded image
image = (Image) capsule.readSavable("image", null);
if (image == null){
// TODO: what to print out here? the texture has no key or data, there's no useful information ..
// assume texture.name is set even though the key is null
Logger.getLogger(Texture.class.getName())
.log(Level.SEVERE, "Cannot load embedded image {0}", toString());
}
}
anisotropicFilter = capsule.readInt("anisotropicFilter", 1);
minificationFilter = capsule.readEnum("minificationFilter",
MinFilter.class,
MinFilter.BilinearNoMipMaps);
magnificationFilter = capsule.readEnum("magnificationFilter",
MagFilter.class, MagFilter.Bilinear);
}
}
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