119 lines
4.7 KiB
C
119 lines
4.7 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 cursor 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/Xcursor/Xcursor.h>
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#include "org_lwjgl_input_Cursor.h"
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#include "org_lwjgl_opengl_LinuxDisplay.h"
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#include "Window.h"
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#include "common_tools.h"
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JNIEXPORT jint JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGetNativeCursorCapabilities
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(JNIEnv *env, jclass clazz) {
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int caps = 0;
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XcursorBool argb_supported = XcursorSupportsARGB(getDisplay());
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XcursorBool anim_supported = XcursorSupportsAnim(getDisplay());
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if (argb_supported)
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caps |= org_lwjgl_input_Cursor_CURSOR_8_BIT_ALPHA | org_lwjgl_input_Cursor_CURSOR_ONE_BIT_TRANSPARENCY;
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if (anim_supported)
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caps |= org_lwjgl_input_Cursor_CURSOR_ANIMATION;
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return caps;
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}
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JNIEXPORT jint JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGetMinCursorSize
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(JNIEnv *env, jclass clazz)
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{
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unsigned int width_return = 0;
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unsigned int height_return = 0;
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XQueryBestCursor(getDisplay(), getCurrentWindow(), 1, 1, &width_return, &height_return);
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return width_return > height_return ? width_return : height_return;
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}
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JNIEXPORT jint JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGetMaxCursorSize
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(JNIEnv *env, jclass clazz)
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{
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unsigned int width_return = 0;
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unsigned int height_return = 0;
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XQueryBestCursor(getDisplay(), getCurrentWindow(), 0xffffffff, 0xffffffff, &width_return, &height_return);
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return width_return > height_return ? height_return : width_return;
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nCreateCursor
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(JNIEnv *env, jclass clazz, jobject handle_buffer, jint width, jint height, jint x_hotspot, jint y_hotspot, jint num_images, jobject image_buffer, jint images_offset, jobject delay_buffer, jint delays_offset)
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{
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if ((*env)->GetDirectBufferCapacity(env, handle_buffer) < sizeof(Cursor)) {
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throwException(env, "Handle buffer not large enough");
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return;
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}
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const int *delays = NULL;
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if (delay_buffer != NULL)
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delays = (const int *)(*env)->GetDirectBufferAddress(env, delay_buffer) + delays_offset;
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XcursorPixel *pixels = (XcursorPixel *)(*env)->GetDirectBufferAddress(env, image_buffer) + images_offset;
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int stride = width*height;
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XcursorImages *cursor_images = XcursorImagesCreate(num_images);
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if (cursor_images == NULL) {
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throwException(env, "Could not allocate cursor.");
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return;
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}
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cursor_images->nimage = num_images;
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int i;
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for (i = 0; i < num_images; i++) {
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XcursorImage *cursor_image = XcursorImageCreate(width, height);
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cursor_image->xhot = x_hotspot;
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cursor_image->yhot = y_hotspot;
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cursor_image->pixels = &(pixels[stride*i]);
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if (num_images > 1)
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cursor_image->delay = delays[i];
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cursor_images->images[i] = cursor_image;
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}
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Cursor *cursor = (Cursor *)(*env)->GetDirectBufferAddress(env, handle_buffer);
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*cursor = XcursorImagesLoadCursor(getDisplay(), cursor_images);
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XcursorImagesDestroy(cursor_images);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nDestroyCursor
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(JNIEnv *env, jclass clazz, jobject cursor_handle_buffer)
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{
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Cursor *cursor = (Cursor *)(*env)->GetDirectBufferAddress(env, cursor_handle_buffer);
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XFreeCursor(getDisplay(), *cursor);
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}
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