356 lines
11 KiB
C
356 lines
11 KiB
C
/*
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* Copyright (c) 2002-2004 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* $Id$
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*
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* Linux mouse handling.
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision$
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*/
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/extensions/xf86vmode.h>
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#include <X11/Xcursor/Xcursor.h>
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#include <assert.h>
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#include <string.h>
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#include "Window.h"
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#include "common_tools.h"
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#include "display.h"
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#include "org_lwjgl_input_Mouse.h"
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#include "org_lwjgl_opengl_LinuxDisplay.h"
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#define EVENT_SIZE 5
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#define POINTER_WARP_BORDER 10
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// scale the mouse wheel according to win32
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#define WHEEL_SCALE 120
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static bool pointer_grabbed;
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static bool created;
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static int accum_dx;
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static int accum_dy;
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static int accum_dz;
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static int last_x;
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static int last_y;
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static jbyte buttons[org_lwjgl_opengl_LinuxDisplay_NUM_BUTTONS];
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static event_queue_t event_queue;
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static Cursor blank_cursor;
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static Cursor current_cursor;
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static bool putMouseEventWithCoords(jint button, jint state, jint coord1, jint coord2, jint dz) {
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jint event[] = {button, state, coord1, coord2, dz};
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return putEvent(&event_queue, event);
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}
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static bool putMouseEvent(jint button, jint state, jint dz) {
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if (isGrabbed())
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return putMouseEventWithCoords(button, state, 0, 0, dz);
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else
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return putMouseEventWithCoords(button, state, last_x, last_y, dz);
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}
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static int transformY(int y) {
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return getWindowHeight() - 1 - y;
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}
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static void setCursorPos(int x, int y) {
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y = transformY(y);
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jint dx = x - last_x;
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jint dy = y - last_y;
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accum_dx += dx;
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accum_dy += dy;
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last_x = x;
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last_y = y;
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if (isGrabbed()) {
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putMouseEventWithCoords(-1, 0, dx, dy, 0);
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} else {
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putMouseEventWithCoords(-1, 0, x, y, 0);
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}
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}
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static void resetCursor(int x, int y) {
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last_x = x;
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last_y = y;
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}
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static bool blankCursor(JNIEnv *env) {
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unsigned int best_width, best_height;
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if (XQueryBestCursor(getDisplay(), getCurrentWindow(), 1, 1, &best_width, &best_height) == 0) {
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throwException(env, "Could not query best cursor size");
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return false;
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}
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Pixmap mask = XCreatePixmap(getDisplay(), getCurrentWindow(), best_width, best_height, 1);
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XGCValues gc_values;
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gc_values.foreground = 0;
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GC gc = XCreateGC(getDisplay(), mask, GCForeground, &gc_values);
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XFillRectangle(getDisplay(), mask, gc, 0, 0, best_width, best_height);
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XFreeGC(getDisplay(), gc);
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XColor dummy_color;
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blank_cursor = XCreatePixmapCursor(getDisplay(), mask, mask, &dummy_color, &dummy_color, 0, 0);
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XFreePixmap(getDisplay(), mask);
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return true;
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}
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static void updateCursor(void) {
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Cursor cursor;
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if (shouldGrab()) {
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cursor = blank_cursor;
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} else {
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cursor = current_cursor;
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}
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XDefineCursor(getDisplay(), getCurrentWindow(), cursor);
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}
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static void grabPointer(void) {
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if (!pointer_grabbed) {
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int result;
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int grab_mask = PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
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result = XGrabPointer(getDisplay(), getCurrentWindow(), False, grab_mask, GrabModeAsync,
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GrabModeAsync, getCurrentWindow(), None, CurrentTime);
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if (result == GrabSuccess) {
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pointer_grabbed = true;
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// make sure we have a centered window
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if (isLegacyFullscreen()) {
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XWindowAttributes win_attribs;
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XGetWindowAttributes(getDisplay(), getCurrentWindow(), &win_attribs);
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XF86VidModeSetViewPort(getDisplay(), getCurrentScreen(), win_attribs.x, win_attribs.y);
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}
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XFlush(getDisplay());
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}
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}
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}
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static void ungrabPointer(void) {
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if (pointer_grabbed) {
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pointer_grabbed = false;
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XUngrabPointer(getDisplay(), CurrentTime);
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XFlush(getDisplay());
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}
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}
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void updatePointerGrab(void) {
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if (!created)
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return;
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if (isFullscreen() || shouldGrab()) {
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grabPointer();
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} else {
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ungrabPointer();
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}
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updateCursor();
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}
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void handleWarpEvent(XClientMessageEvent *event) {
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int center_x = event->data.l[0];
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int center_y = event->data.l[1];
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resetCursor(center_x, center_y);
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}
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static void doWarpPointer(int center_x, int center_y) {
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XEvent warp_event;
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warp_event.type = ClientMessage;
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warp_event.xclient.message_type = getWarpAtom();
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warp_event.xclient.format = 32;
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warp_event.xclient.data.l[0] = center_x;
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warp_event.xclient.data.l[1] = center_y;
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XSendEvent(getDisplay(), getCurrentWindow(), False, 0, &warp_event);
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XWarpPointer(getDisplay(), None, getCurrentWindow(), 0, 0, 0, 0, center_x, center_y);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nSetNativeCursor(JNIEnv *env, jclass clazz, jobject cursor_handle) {
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if (cursor_handle != NULL) {
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Cursor *cursor = (Cursor *)(*env)->GetDirectBufferAddress(env, cursor_handle);
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current_cursor = *cursor;
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} else
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current_cursor = None;
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updateCursor();
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}
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static void reset(void) {
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initEventQueue(&event_queue, EVENT_SIZE);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nCreateMouse
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(JNIEnv * env, jclass clazz)
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{
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int i;
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last_y = last_x = accum_dx = accum_dy = accum_dz = 0;
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reset();
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for (i = 0; i < org_lwjgl_opengl_LinuxDisplay_NUM_BUTTONS; i++)
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buttons[i] = 0;
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if (!blankCursor(env)) {
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return;
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}
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current_cursor = None;
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created = true;
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pointer_grabbed = false;
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updatePointerGrab();
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initEventQueue(&event_queue, EVENT_SIZE);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nDestroyMouse
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(JNIEnv * env, jclass clazz)
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{
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ungrabPointer();
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XFreeCursor(getDisplay(), blank_cursor);
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created = false;
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}
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static unsigned char mapButton(XButtonEvent *event) {
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switch (event->button) {
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case Button1:
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return 0;
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case Button2:
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return 2;
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case Button3:
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return 1;
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default: return org_lwjgl_opengl_LinuxDisplay_NUM_BUTTONS;
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}
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}
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static void handleButton(XButtonEvent *event, unsigned char state) {
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unsigned char button_num = mapButton(event);
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if (button_num == org_lwjgl_opengl_LinuxDisplay_NUM_BUTTONS)
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return;
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buttons[button_num] = state;
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putMouseEvent(button_num, state, 0);
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}
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void handleButtonPress(XButtonEvent *event) {
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jint delta = 0;
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switch (event->button) {
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case Button4:
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delta = WHEEL_SCALE;
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putMouseEvent(-1, 0, delta);
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break;
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case Button5:
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delta = -WHEEL_SCALE;
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putMouseEvent(-1, 0, delta);
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break;
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default:
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break;
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}
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accum_dz += delta;
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handleButton(event, 1);
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}
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void handleButtonRelease(XButtonEvent *event) {
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handleButton(event, 0);
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}
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static int max(int v1, int v2) {
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return v1 > v2 ? v1 : v2;
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}
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static int min(int v1, int v2) {
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return v1 < v2 ? v1 : v2;
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}
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static void doHandlePointerMotion(int root_x, int root_y, int win_x, int win_y) {
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setCursorPos(win_x, win_y);
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if (!pointer_grabbed || !shouldGrab())
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return;
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// find the window position in root coordinates
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int win_left = root_x - win_x;
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int win_top = root_y - win_y;
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int win_right = win_left + getWindowWidth();
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int win_bottom = win_top + getWindowHeight();
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// cap the window position to the screen dimensions
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int border_left = max(0, win_left);
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int border_top = max(0, win_top);
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int border_right = min(getScreenModeWidth(), win_right);
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int border_bottom = min(getScreenModeHeight(), win_bottom);
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// determine whether the cursor is outside the bounds
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bool outside_limits = root_x < border_left + POINTER_WARP_BORDER || root_y < border_top + POINTER_WARP_BORDER ||
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root_x > border_right - POINTER_WARP_BORDER || root_y > border_bottom - POINTER_WARP_BORDER;
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if (outside_limits) {
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// Find the center of the limits in window coordinates
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int center_x = (border_right - border_left)/2;
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int center_y = (border_bottom - border_top)/2;
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doWarpPointer(center_x, center_y);
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}
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}
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void handlePointerMotion(XMotionEvent *event) {
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doHandlePointerMotion(event->x_root, event->y_root, event->x, event->y);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nPollMouse(JNIEnv * env, jclass clazz, jobject coord_buffer_obj, jobject button_buffer_obj) {
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int *coords = (int *)(*env)->GetDirectBufferAddress(env, coord_buffer_obj);
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int coords_length = (*env)->GetDirectBufferCapacity(env, coord_buffer_obj);
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unsigned char *buttons_buffer = (unsigned char *)(*env)->GetDirectBufferAddress(env, button_buffer_obj);
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int buttons_length = (*env)->GetDirectBufferCapacity(env, button_buffer_obj);
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handleMessages(env);
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if (coords_length < 3) {
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printfDebugJava(env, "ERROR: Not enough space in coords array: %d < 3", coords_length);
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return;
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}
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if (isGrabbed()) {
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coords[0] = accum_dx;
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coords[1] = accum_dy;
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} else {
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coords[0] = last_x;
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coords[1] = last_y;
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}
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coords[2] = accum_dz;
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accum_dx = accum_dy = accum_dz = 0;
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int num_buttons = org_lwjgl_opengl_LinuxDisplay_NUM_BUTTONS;
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if (num_buttons > buttons_length)
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num_buttons = buttons_length;
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int i;
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for (i = 0; i < num_buttons; i++)
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buttons_buffer[i] = buttons[i];
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}
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JNIEXPORT jint JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nReadMouse(JNIEnv *env, jclass clazz, jobject buffer, jint buffer_position) {
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jint* buffer_ptr = (jint *)(*env)->GetDirectBufferAddress(env, buffer);
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int buffer_size = ((*env)->GetDirectBufferCapacity(env, buffer))/sizeof(jint) - buffer_position;
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handleMessages(env);
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return copyEvents(&event_queue, buffer_ptr + buffer_position, buffer_size);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGrabMouse(JNIEnv * env, jclass clazz, jboolean new_grab) {
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Window root_return, child_return;
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int root_x, root_y, win_x, win_y;
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unsigned int mask_return;
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setGrab(new_grab == JNI_TRUE ? true : false);
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reset();
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accum_dx = accum_dy = 0;
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XQueryPointer(getDisplay(), getCurrentWindow(), &root_return, &child_return, &root_x, &root_y, &win_x, &win_y, &mask_return);
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doHandlePointerMotion(root_x, root_y, win_x, win_y);
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}
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