mirror of git://gcc.gnu.org/git/gcc.git
153 lines
4.0 KiB
Java
153 lines
4.0 KiB
Java
/* Copyright (C) 2000 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package gnu.gcj.xlib;
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import gnu.gcj.RawData;
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/**
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* A visual determines how a color is encoded into a pixel/bitfield
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* value. It does not determine how the pixel/bitfield value is
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* encoded into the image data.
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*
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* <p>This class encapsulates all three Xlib representations of a
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* visual.
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*
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* <ul>
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*
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* <li>int: visual id.
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*
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* <li>Visual: opaque data structure used by a lot of Xlib functions.
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*
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* <li>VisualInfo: transparent data structure that binds the visual to
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* a certain screen and depth.
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*
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* </ul>
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*
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* <p>Implementation note: This class does not examine nor manipulate
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* the Visual structure, since the X manual says the structure is
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* opaque, and that XVisualInfo should be used instead.</p>
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*
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* @author Rolf W. Rasmussen <rolfwr@ii.uib.no>
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*/
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public final class Visual
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{
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public static final int VC_STATIC_GRAY = 0,
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VC_GRAY_SCALE = 1,
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VC_STATIC_COLOR = 2,
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VC_PSEUDO_COLOR = 3,
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VC_TRUE_COLOR = 4,
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VC_DIRECT_COLOR = 5;
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protected static final int MASK_ID = 1 << 0,
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MASK_SCREEN = 1 << 1,
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MASK_DEPTH = 1 << 2,
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MASK_CLASS = 1 << 3,
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MASK_RED = 1 << 4,
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MASK_GREEN = 1 << 5,
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MASK_BLUE = 1 << 6,
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MASK_COLORMAP_SIZE = 1 << 7,
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MASK_BITS_PER_RGB = 1 << 8;
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protected static final int MASK_ALL = MASK_ID
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| MASK_SCREEN
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| MASK_DEPTH
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| MASK_CLASS
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| MASK_RED
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| MASK_GREEN
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| MASK_BLUE
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| MASK_COLORMAP_SIZE
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| MASK_BITS_PER_RGB;
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private static final int MASK_VISUAL_STRUCTURE = 1 << 31;
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Display display;
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RawData xVisualInfo;
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int infoMask;
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Screen screen;
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Visual(RawData structure, Screen screen, int depth )
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{
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this.display = screen.getDisplay();
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this.screen = screen;
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init(structure, depth);
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}
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Visual(Display display, RawData structure, int depth )
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{
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this.display = display;
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init(structure, depth);
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}
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protected native void init(RawData structure, int depth);
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protected native void finalize();
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/**
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*
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* Returns the a reference to the visual structure. This method has
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* package accessibility since the data visual structure is only
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* useful for direct Xlib calls.
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*
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* @return a pointer to the visual structure.
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*/
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native RawData getVisualStructure();
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// These methods only make sense if the visual is decomposed:
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public native int getRedMask();
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public native int getGreenMask();
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public native int getBlueMask();
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public native int getScreenNumber();
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public native int getDepth();
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public Screen getScreen()
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{
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if (screen == null)
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screen = new Screen(display, getScreenNumber());
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return screen;
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}
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public native int getVisualClass();
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public boolean hasRGBSubfields()
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{
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switch (getVisualClass())
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{
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case VC_TRUE_COLOR:
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case VC_DIRECT_COLOR:
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return true;
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default:
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return false;
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}
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}
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protected native void ensureXVisualInfo(int requiredMask);
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public String toString()
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{
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int missingInfo = ~infoMask;
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boolean hasSubfieldInfo =
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(missingInfo & (MASK_CLASS|MASK_RED|MASK_GREEN|MASK_BLUE)) == 0;
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boolean hasDepth = (missingInfo & MASK_DEPTH) == 0;
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return getClass().getName() + "[" +
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(hasDepth ? "depth=" + getDepth() : "") +
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(hasRGBSubfields() ?
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(", redMask=" + Integer.toHexString(getRedMask()) +
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", greenMask=" + Integer.toHexString(getGreenMask()) +
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", blueMask=" + Integer.toHexString(getBlueMask())) :
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", no-subfields") + ", class=" + getVisualClass() +
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"]";
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}
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}
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