/*
* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.java2d.pipe.hw;
/**
* Represents a set of capabilities of a BufferedContext and associated
* AccelGraphicsConfig.
*
* @see AccelGraphicsConfig
*/
public class ContextCapabilities {
/** Indicates that the context has no capabilities. */
public static final int CAPS_EMPTY = (0 << 0);
/** Indicates that the context supports RT surfaces with alpha channel. */
public static final int CAPS_RT_PLAIN_ALPHA = (1 << 1);
/** Indicates that the context supports RT textures with alpha channel. */
public static final int CAPS_RT_TEXTURE_ALPHA = (1 << 2);
/** Indicates that the context supports opaque RT textures. */
public static final int CAPS_RT_TEXTURE_OPAQUE = (1 << 3);
/** Indicates that the context supports multitexturing. */
public static final int CAPS_MULTITEXTURE = (1 << 4);
/** Indicates that the context supports non-pow2 texture dimensions. */
public static final int CAPS_TEXNONPOW2 = (1 << 5);
/** Indicates that the context supports non-square textures. */
public static final int CAPS_TEXNONSQUARE = (1 << 6);
/** Indicates that the context supports pixel shader 2.0 or better. */
public static final int CAPS_PS20 = (1 << 7);
/** Indicates that the context supports pixel shader 3.0 or better. */
public static final int CAPS_PS30 = (1 << 8);
/*
* Pipeline contexts should use this for defining pipeline-specific
* capabilities, for example:
* int CAPS_D3D_1 = (FIRST_PRIVATE_CAP << 0);
* int CAPS_D3D_2 = (FIRST_PRIVATE_CAP << 1);
*/
protected static final int FIRST_PRIVATE_CAP = (1 << 16);
protected final int caps;
protected final String adapterId;
/**
* Constructs a {@code ContextCapabilities} object.
* @param caps an {@code int} representing the capabilities
* @param adapterId {@code String} representing the name of the adapter, or null,
* in which case the adapterId will be set to "unknown adapter".
*/
protected ContextCapabilities(int caps, String adapterId) {
this.caps = caps;
this.adapterId = adapterId != null ? adapterId : "unknown adapter";
}
/**
* Returns a string representing the name of the graphics adapter if such
* could be determined. It is guaranteed to never return {@code null}.
* @return string representing adapter id
*/
public String getAdapterId() {
return adapterId;
}
/**
* Returns an {@code int} with capabilities (OR-ed constants defined in
* this class and its pipeline-specific subclasses).
* @return capabilities as {@code int}
*/
public int getCaps() {
return caps;
}
@Override
public String toString() {
StringBuilder sb =
new StringBuilder("ContextCapabilities: adapter=" +
adapterId+", caps=");
if (caps == CAPS_EMPTY) {
sb.append("CAPS_EMPTY");
} else {
if ((caps & CAPS_RT_PLAIN_ALPHA) != 0) {
sb.append("CAPS_RT_PLAIN_ALPHA|");
}
if ((caps & CAPS_RT_TEXTURE_ALPHA) != 0) {
sb.append("CAPS_RT_TEXTURE_ALPHA|");
}
if ((caps & CAPS_RT_TEXTURE_OPAQUE) != 0) {
sb.append("CAPS_RT_TEXTURE_OPAQUE|");
}
if ((caps & CAPS_MULTITEXTURE) != 0) {
/**代码未完, 请加载全部代码(NowJava.com).**/