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Escher is a collection of libraries for X Window System written purely in Java.
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package gnu.x11;
import gnu.x11.image.Image;
import gnu.x11.image.ZPixmap;
/** X drawable. */
public abstract class Drawable extends Resource {
public int width, height;
/** Predefined. */
public Drawable (int id) {
super (id);
}
/** Create. */
public Drawable (Display display) {
super (display);
}
/** Intern. */
public Drawable (Display display, int id) {
super (display, id);
}
public static class GeometryInfo {
public int depth;
public int root_window_id;
public int x;
public int y;
public int width;
public int height;
public int border_width;
GeometryInfo (ResponseInputStream i) {
depth = i.read_int8 ();
i.skip (6);
root_window_id = i.read_int32 ();
x = i.read_int16 ();
y = i.read_int16 ();
width = i.read_int16 ();
height = i.read_int16 ();
border_width = i.read_int16 ();
i.skip (10); // Unused.
}
}
// opcode 14 - get geometry
/**
* @see XGetGeometry
*/
public GeometryInfo get_geometry () {
GeometryInfo info;
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (14, 0, 2);
o.write_int32 (id);
ResponseInputStream i = display.in;
synchronized (i) {
i.read_reply (o);
i.skip (1);
info = new GeometryInfo (i);
}
}
// FIXME: Is this good? Not sure.
width = info.width;
height = info.height;
return info;
}
// opcode 62 - copy area
/**
* Copies a specified rectangular area to another location.
*
* @param src the source drawable
* @param gc the GC for the operation
* @param src_x the source rectangle, x coordinate
* @param src_y the source rectangle, y coordinate
* @param width the width of the area to copy
* @param height the height of the area to copy
* @param dst_x the destination rectangle, x coordinate
* @param dst_y the destination rectangle, y coordinate
*
* @see XCopyArea
*/
public void copy_area (Drawable src, GC gc, int src_x, int src_y,
int width, int height, int dst_x, int dst_y) {
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (62, 0, 7);
o.write_int32 (src.id); // Src-drawable.
o.write_int32 (id); // Dst-drawable.
o.write_int32 (gc.id); // GC.
o.write_int16 (src_x);
o.write_int16 (src_y);
o.write_int16 (dst_x);
o.write_int16 (dst_y);
o.write_int16 (width);
o.write_int16 (height);
o.send ();
}
}
// opcode 63 - copy plane
/**
* @see XCopyPlane
*/
public void copy_plane (Drawable src, GC gc, int src_x, int src_y,
int dst_x, int dst_y, int width, int height, int bit_plane) {
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (63, 0, 8);
o.write_int32 (src.id);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (src_x);
o.write_int16 (src_y);
o.write_int16 (dst_x);
o.write_int16 (dst_y);
o.write_int16 (width);
o.write_int16 (height);
o.write_int16 (bit_plane);
o.send ();
}
}
/**
* Coordinate mode ORIGIN, specifies that points are always considered
* relative to the origin.
*/
public static final int ORIGIN = 0;
/**
* Coordinate mode PREVIOUS, specifies that points are considered relative
* to the previous point (where the first point is usually considered
* relative to the origin).
*/
public static final int PREVIOUS = 1;
// opcode 64 - poly point
/**
* Draws multiple points.
*
* @param gc the GC to use
* @param xpoints the points' x coordinates
* @param ypoints the points' y coodinates
* @param npoints the number of points
* @param coordinate_mode valid: {@link #ORIGIN}, {@link #PREVIOUS}
*
* @see XDrawPoints
*/
public void poly_point (GC gc, int[] xpoints, int[] ypoints, int npoints,
int coordinate_mode) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (64, coordinate_mode, 3 + npoints);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < npoints; i++) {
o.write_int16 (xpoints[i]);
o.write_int16 (ypoints[i]);
}
o.send ();
}
}
/**
* Draws multiple points.
*
* @param gc the GC to use
* @param xpoints the points' x coordinates
* @param ypoints the points' y coodinates
* @param npoints the number of points
* @param coordinate_mode valid: {@link #ORIGIN}, {@link #PREVIOUS}
*
* @see XDrawPoints
*/
public void poly_point (GC gc, Point[] points, int coordinate_mode) {
// FIXME: Handle aggregation.
int npoints = points.length;
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (64, coordinate_mode, 3 + points.length);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < npoints; i++) {
o.write_int16 (points[i].x);
o.write_int16 (points[i].y);
}
o.send ();
}
}
// opcode 65 - poly line
/**
* Draws multiple lines that connect the specified points.
*
* @param gc the GC to use
* @param xpoints the points' x coordinates
* @param ypoints the points' y coodinates
* @param npoints the number of points
* @param coordinate_mode valid: {@link #ORIGIN}, {@link #PREVIOUS}
*
* @see XDrawLines
*/
public void poly_line (GC gc, int[] xpoints, int[] ypoints, int npoints,
int coordinate_mode) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (65, coordinate_mode, 3 + npoints);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < npoints; i++) {
o.write_int16 (xpoints[i]);
o.write_int16 (ypoints[i]);
}
o.send ();
}
}
public void poly_line (GC gc, int[] xpoints, int[] ypoints, int npoints,
int coordinate_mode, boolean close) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (65, coordinate_mode, 3 + npoints + (close ? 1 : 0));
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < npoints; i++) {
o.write_int16 (xpoints[i]);
o.write_int16 (ypoints[i]);
}
if (close) {
o.write_int16 (xpoints [0]);
o.write_int16 (ypoints [0]);
}
o.send ();
}
}
/**
* Draws multiple lines which connect the specified points.
*
* @param gc the GC to use
* @param points the points that make up the lines
* @param coordinate_mode valid: {@link #ORIGIN}, {@link #PREVIOUS}
*
* @see XDrawLines
*/
public void poly_line (GC gc, Point[] points, int coordinate_mode) {
// FIXME: Handle aggregation.
int npoints = points.length;
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (65, coordinate_mode, 3 + points.length);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < npoints; i++) {
o.write_int16 (points[i].x);
o.write_int16 (points[i].y);
}
o.send ();
}
}
// opcode 66 - poly segment
/**
* Draws multiple line segments
*
* @param gc the GC to use
* @param segments the line segments to draw
*
* @see XDrawSegments
*/
public void poly_segment (GC gc, Segment [] segments) {
// FIXME: Handle aggregation.
int nsegs = segments.length;
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (66, 0, 3 + 2 * nsegs);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < nsegs; i++) {
Segment seg = segments[i];
o.write_int16 (seg.x1);
o.write_int16 (seg.y1);
o.write_int16 (seg.x2);
o.write_int16 (seg.y2);
}
o.send ();
}
}
// opcode 67 - poly rectangle
/**
* Draws the outline of multiple rectangles.
*
* @param gc the GC to use
* @param rectangles the rectangles to draw
*
* @see XDrawRectangles
* @see XFillRectangles
* @see Request.Aggregate aggregation
*/
public void poly_rectangle (GC gc, Rectangle [] rectangles) {
// FIXME: Handle aggregation.
int nrects = rectangles.length;
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (67, 0, 3 + 2 * nrects);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < nrects; i++) {
Rectangle rect = rectangles[i];
o.write_int16 (rect.x);
o.write_int16 (rect.y);
o.write_int16 (rect.width);
o.write_int16 (rect.height);
}
o.send ();
}
}
// opcode 68 - poly arc
public void poly_arc (GC gc, Arc [] arcs) {
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (68, 0, 3 + 3 * arcs.length);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < arcs.length; i++) {
Arc arc = arcs [i];
o.write_int16 (arc.x);
o.write_int16 (arc.y);
o.write_int16 (arc.width);
o.write_int16 (arc.height);
o.write_int16 (arc.angle1);
o.write_int16 (arc.angle2);
}
}
}
// opcode 71 - poly fill arc
public void poly_fill_arc (GC gc, Arc [] arcs) {
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (71, 0, 3 + 3 * arcs.length);
o.write_int32 (id);
o.write_int32 (gc.id);
for (int i = 0; i < arcs.length; i++) {
Arc arc = arcs [i];
o.write_int16 (arc.x);
o.write_int16 (arc.y);
o.write_int16 (arc.width);
o.write_int16 (arc.height);
o.write_int16 (arc.angle1);
o.write_int16 (arc.angle2);
}
}
}
public static final int COMPLEX = 0;
public static final int NONCONVEX = 1;
public static final int CONVEX = 2;
// opcode 69 - fill poly
/**
* This request will be aggregated.
*
* @param shape valid:
* {@link #COMPLEX},
* {@link #NONCONVEX},
* {@link #CONVEX}
*
* @param coordinate_mode valid:
* {@link #ORIGIN},
* {@link #PREVIOUS}
*
* @see XFillPolygon
* @see Request.Aggregate aggregation
*/
public void fill_poly (GC gc, Point [] points, int shape,
int coordinate_mode) {
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (69, 0, 4 + points.length);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int8 (shape);
o.write_int8 (coordinate_mode);
o.skip (2);
for (int i = 0; i < points.length; i++) {
Point p = points [i];
o.write_int16 (p.x);
o.write_int16 (p.y);
}
o.send ();
}
}
public void fill_poly (GC gc, int [] xpoints, int [] ypoints, int npoints,
int shape, int coordinate_mode) {
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (69, 0, 4 + npoints);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int8 (shape);
o.write_int8 (coordinate_mode);
o.skip (2);
for (int i = 0; i < npoints; i++) {
o.write_int16 (xpoints [i]);
o.write_int16 (ypoints [i]);
}
}
}
// opcode 72 - put image
public void put_small_image (GC gc, Image image, int y1, int y2,
int x, int y) {
RequestOutputStream o = display.out;
synchronized (o) {
int offset = image.get_line_byte_count () * y1;
int length = image.get_line_byte_count () * (y2 - y1);
int p = RequestOutputStream.pad (length);
Image.Format format = image.get_format ();
o.begin_request (72, format.id (), 6 + (length + p) / 4);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (image.get_width ());
o.write_int16 (y2 - y1);
o.write_int16 (x);
o.write_int16 (y);
o.write_int8 (image.get_left_pad ());
o.write_int8 (image.get_pixmap_format ().depth);
o.skip (2);
o.write (image.get_data (), offset, length);
o.send ();
}
}
// opcode 73 - get image TODO
/**
* @see XGetImage
*/
public Image image (int x, int y, int width, int height, int plane_mask,
Image.Format format) {
// System.err.println("params x: " + x + ", y: " + y + ", w: " + width + ", h: " + height + ", plane_mask: " + plane_mask + ", format: " + format);
// System.err.println("drawable " + this + ", w: " + this.width + ", h: " + this.height);
RequestOutputStream o = display.out;
Image image;
synchronized (o) {
o.begin_request (73, format.id (), 5);
o.write_int32 (id);
o.write_int16 (x);
o.write_int16 (y);
o.write_int16 (width);
o.write_int16 (height);
o.write_int32 (plane_mask);
ResponseInputStream i = display.in;
synchronized (i) {
i.read_reply (o);
i.skip (1);
int depth = i.read_int8 ();
i.skip (2);
int len = i.read_int32 () * 4;
int visual_id = i.read_int32 ();
i.skip (20);
byte[] data = new byte [len];
i.read_data (data);
// TODO Handle XYPixmap.
if (format == Image.Format.ZPIXMAP) {
image = new ZPixmap (display, width, height,
display.default_pixmap_format, data);
} else {
throw new UnsupportedOperationException("Support for XYPixmap not yet implemented");
}
}
}
return image;
}
// opcode 74 - poly text8
/**
* @see XDrawText
*/
public void poly_text (GC gc, int x, int y, Text [] texts) {
int n = length (texts, 8);
int p = RequestOutputStream.pad (n);
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (74, 0, 4 + (n + p) / 4);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
for (int i = 0; i < texts.length; i++) {
if (texts [i].font != null) {
o.write_int8 (255);// font-shift indicator
o.write_int32 (texts [i].font.id); // java = MSB
}
o.write_int8 (texts [i].s.length ());
o.write_int8 (texts [i].delta);
o.write_string8 (texts [i].s);
}
// Can't simply skip the padding bytes, otherwise the X server
// would think that there are more items if the next byte in the
// buffer is != 0, this would produce random errors.
for (int i = 0; i < p; i++) {
o.write_int8 (0);
}
o.send ();
}
}
// opcode 75 - poly text16
/**
* @see XDrawText16
*/
public void poly_text16 (GC gc, int x, int y, Text [] texts) {
int n = length (texts, 16);
int p = RequestOutputStream.pad (n);
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (75, 0, 4 + (n + p) / 4);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
for (int i = 0; i < texts.length; i++) {
if (texts [i].font != null) {
o.write_int8 (255);// font-shift indicator
o.write_int32 (texts [i].font.id); // java = MSB
}
String s = texts [i].s;
if (s.charAt (0) > 128) { // non-ascii
o.write_int8 (s.length ()/2);
o.write_int8 (texts [i].delta);
o.write_string8 (s);
} else {// ascii
o.write_int8 (s.length ());
o.write_int8 (texts [i].delta);
o.write_string16 (s);
}
}
o.send ();
}
}
// opcode 76 - image text8
/**
* @see XDrawImageString
*/
public void image_text (GC gc, int x, int y, String s) {
int n = s.length ();
int p = RequestOutputStream.pad (n);
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (76, n, 4 + (n + p) / 4);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
o.write_string8 (s);
o.send ();
}
}
// opcode 77 - image text16
/**
* @see XDrawImageString16
*/
public void image_text16 (GC gc, int x, int y, String s) {
int n = s.length ();
int p = RequestOutputStream.pad (2 * n);
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (77, n, 4 + (2 * n + p) / 4);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
o.write_string16 (s);
o.send ();
}
}
public static final int CURSOR = 0;
public static final int TILE = 1;
public static final int STIPPLE = 2;
// opcode 97 - query best size
/**
* @param klass valid:
* {@link #CURSOR},
* {@link #TILE},
* {@link #STIPPLE}
*
* @see XQueryBestSize
*/
public Size best_size (int klass, int width, int height) {
RequestOutputStream o = display.out;
int w, h;
synchronized (o) {
o.begin_request (97, klass, 3);
o.write_int32 (id);
o.write_int16 (width);
o.write_int16 (height);
o.send ();
ResponseInputStream i = display.in;
synchronized (i) {
i.read_reply(o);
i.skip (8);
w = i.read_int16 ();
h = i.read_int16 ();
i.skip (20);
}
}
return new Size (w, h);
}
/**
* Draws the outline of a single arc.
*
* @param gc the GC to use
* @param x the bounding rectangle, x coordinate
* @param y the bounding rectangle, y coordinate
* @param w the bounding rectangle, width
* @param h the bounding rectangle, height
* @param angle1 the start angle, from 3 o'clock ccw, in degrees
* @param angle2 the span angle, from angle1 ccw, in degrees
*
* @see #poly_arc(GC, Arc[])
*/
public void arc (GC gc, int x, int y, int width, int height,
int angle1, int angle2) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (68, 0, 6);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
o.write_int16 (width);
o.write_int16 (height);
o.write_int16 (angle1);
o.write_int16 (angle2);
o.send ();
}
}
/**
* Fills a single arc.
*
* @param gc the GC to use
* @param x the bounding rectangle, x coordinate
* @param y the bounding rectangle, y coordinate
* @param w the bounding rectangle, width
* @param h the bounding rectangle, height
* @param angle1 the start angle, from 3 o'clock ccw, in degrees
* @param angle2 the span angle, from angle1 ccw, in degrees
*
* @see #poly_arc(GC, Arc[])
*/
public void fill_arc (GC gc, int x, int y, int width, int height,
int angle1, int angle2) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (71, 0, 6);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
o.write_int16 (width);
o.write_int16 (height);
o.write_int16 (angle1);
o.write_int16 (angle2);
o.send ();
}
}
/**
* Draws a single line.
*
* @param gc the GC to use
* @param x1 the start point, x coordinate
* @param y1 the start point, y coordinate
* @param x2 the end point, x coordinate
* @param y2 the end point, y coordinate
*/
public void line (GC gc, int x1, int y1, int x2, int y2) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (65, ORIGIN, 5);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x1);
o.write_int16 (y1);
o.write_int16 (x2);
o.write_int16 (y2);
}
}
public void segment (GC gc, int x1, int y1, int x2, int y2) {
RequestOutputStream o = display.out;
synchronized (o) {
if (o.current_opcode () == 66 && o.fits (8)) {
o.increase_length (2);
o.write_int16 (x1);
o.write_int16 (y1);
o.write_int16 (x2);
o.write_int16 (y2);
} else {
o.begin_request (66, ORIGIN, 5);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x1);
o.write_int16 (y1);
o.write_int16 (x2);
o.write_int16 (y2);
}
}
}
/**
* Draws a single point.
*
* @param x the x coordinate
* @param y the y coordinate
*/
public void point (GC gc, int x, int y) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (64, ORIGIN, 4);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
o.send ();
}
}
public void put_image (GC gc, Image image, int x, int y) {
// TODO: Make use of big requests when possible.
int max_data_byte = display.maximum_request_length - 24;
int lbc = image.get_line_byte_count ();
int request_height = lbc > 0 ? max_data_byte / image.get_line_byte_count ()
: 1;
int rem = image.get_height () % request_height;
int request_count = image.get_height ()/ request_height + (rem == 0 ? 0 : 1);
for (int i = 0; i < request_count; i++) {
put_small_image (gc, image, i * request_height,
Math.min (image.get_height (), (i + 1) * request_height), x,
y + i * request_height);
}
}
/**
* Draws a single rectangle.
*
* @param gc the graphic context
* @param x the upper left corner, x coordinate
* @param y the upper left corner, y coordinate
* @param width the width
* @param height the height
*
* @see #poly_rectangle(GC, Rectangle[])
*/
public void rectangle (GC gc, int x, int y, int width, int height) {
// FIXME: Handle aggregation.
RequestOutputStream o = display.out;
synchronized (o) {
o.begin_request (67, 0, 5);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
o.write_int16 (width);
o.write_int16 (height);
o.send ();
}
}
/**
* Fills a single rectangle.
*
* @param gc the graphic context
* @param x the upper left corner, x coordinate
* @param y the upper left corner, y coordinate
* @param width the width
* @param height the height
*
* @see #poly_fill_rectangle(GC, Rectangle[])
*/
public void fill_rectangle (GC gc, int x, int y, int width, int height) {
RequestOutputStream o = display.out;
synchronized (o) {
if (o.current_opcode() == 70 && o.get_int32(4) == id
&& o.get_int32(8) == gc.id)
{
o.increase_length(2);
o.write_int16 (x);
o.write_int16 (y);
o.write_int16 (width);
o.write_int16 (height);
}
else
{
o.begin_request (70, 0, 5);
o.write_int32 (id);
o.write_int32 (gc.id);
o.write_int16 (x);
o.write_int16 (y);
o.write_int16 (width);
o.write_int16 (height);
o.send ();
}
}
}
/**
* @see #poly_text(GC, int, int, Text[])
*/
public void text8 (GC gc, int x, int y, String s, int delta, Font font) {
poly_text (gc, x, y, new Text [] {new Text (s, delta, font)});
}
/**
* @see #text(GC, int, int, String, int, Font)
*/
public void text (GC gc, int x, int y, String s) {
poly_text (gc, x, y, new Text [] {new Text (s, 0, null)});
}
public void text16 (GC gc, int x, int y, String s) {
poly_text16 (gc, x, y, new Text [] {new Text (s, 0, null)});
}
private int length (Text [] texts, int bit) {
int n = 0;
for (int i = 0; i < texts.length; i++)
n += texts [i].length (bit);
return n;
}
/**
* @deprecated
*/
public void rectangle (GC xgc, int x, int y, int w, int h, boolean fill) {
if (fill)
fill_rectangle (xgc, x, y, w, h);
else
rectangle (xgc, x, y, w, h);
}
}
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