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/* Communication module for Android terminals. -*- c-file-style: "GNU" -*-
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
package org.gnu.emacs;
import android.graphics.Rect;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Xfermode;
/* X like graphics context structures. Keep the enums in synch with
androidgui.h! */
public final class EmacsGC extends EmacsHandleObject
{
public static final int GC_COPY = 0;
public static final int GC_XOR = 1;
public static final int GC_FILL_SOLID = 0;
public static final int GC_FILL_OPAQUE_STIPPLED = 1;
public static final Xfermode xorAlu, srcInAlu;
public int function, fill_style;
public int foreground, background;
public int clip_x_origin, clip_y_origin;
public int ts_origin_x, ts_origin_y;
public Rect clip_rects[], real_clip_rects[];
public EmacsPixmap clip_mask, stipple;
public Paint gcPaint;
/* ID incremented every time the clipping rectangles of any GC
changes. */
private static long clip_serial;
/* The value of clipRectID after the last time this GCs clip
rectangles changed. 0 if there are no clip rectangles. */
public long clipRectID;
static
{
xorAlu = new PorterDuffXfermode (Mode.XOR);
srcInAlu = new PorterDuffXfermode (Mode.SRC_IN);
}
/* The following fields are only set on immutable GCs. */
public
EmacsGC (short handle)
{
/* For historical reasons the C code has an extra layer of
indirection above this GC handle. struct android_gc is the GC
used by Emacs code, while android_gcontext is the type of the
handle. */
super (handle);
fill_style = GC_FILL_SOLID;
function = GC_COPY;
foreground = 0;
background = 0xffffff;
gcPaint = new Paint ();
}
/* Mark this GC as dirty. Apply parameters to the paint and
recompute real_clip_rects. */
public void
markDirty (boolean clipRectsChanged)
{
int i;
if (clipRectsChanged)
{
if ((ts_origin_x != 0 || ts_origin_y != 0)
&& clip_rects != null)
{
real_clip_rects = new Rect[clip_rects.length];
for (i = 0; i < clip_rects.length; ++i)
{
real_clip_rects[i] = new Rect (clip_rects[i]);
real_clip_rects[i].offset (ts_origin_x, ts_origin_y);
}
}
else
real_clip_rects = clip_rects;
clipRectID = ++clip_serial;
}
gcPaint.setStrokeWidth (1f);
gcPaint.setColor (foreground | 0xff000000);
gcPaint.setXfermode (function == GC_XOR
? xorAlu : srcInAlu);
}
public void
resetXfermode ()
{
gcPaint.setXfermode (function == GC_XOR
? xorAlu : srcInAlu);
}
};
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