410 lines
16 KiB
C
410 lines
16 KiB
C
/*
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* Copyright (c) 2002-2011 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: display.c 2985 2008-04-07 18:42:36Z matzon $
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*
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* Linux specific library for display handling.
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision: 2985 $
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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/extensions/Xrandr.h>
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#include <X11/Xutil.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "common_tools.h"
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#include "org_lwjgl_opengl_LinuxDisplay.h"
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#define NUM_XRANDR_RETRIES 5
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typedef struct {
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int width;
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int height;
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int freq;
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union {
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int size_index; // Data for Xrandr extension
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XF86VidModeModeInfo xf86vm_modeinfo; // Data for XF86VidMode extension
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} mode_data;
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} mode_info;
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static bool getXF86VidModeVersion(JNIEnv *env, Display *disp, int *major, int *minor) {
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int event_base, error_base;
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if (!XF86VidModeQueryExtension(disp, &event_base, &error_base)) {
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printfDebugJava(env, "XF86VidMode extension not available");
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return false;
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}
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if (!XF86VidModeQueryVersion(disp, major, minor)) {
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throwException(env, "Could not query XF86VidMode version");
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return false;
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}
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printfDebugJava(env, "XF86VidMode extension version %i.%i", *major, *minor);
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return true;
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}
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static bool getXrandrVersion(JNIEnv *env, Display *disp, int *major, int *minor) {
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int event_base, error_base;
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if (!XRRQueryExtension(disp, &event_base, &error_base)) {
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printfDebugJava(env, "Xrandr extension not available");
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return false;
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}
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if (!XRRQueryVersion(disp, major, minor)) {
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throwException(env, "Could not query Xrandr version");
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return false;
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}
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printfDebugJava(env, "Xrandr extension version %i.%i", *major, *minor);
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return true;
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}
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static bool isXrandrSupported(JNIEnv *env, Display *disp) {
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int major, minor;
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if (!getXrandrVersion(env, disp, &major, &minor))
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return false;
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return major >= 1;
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}
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static bool isXF86VidModeSupported(JNIEnv *env, Display *disp) {
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int minor_ver, major_ver;
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if (!getXF86VidModeVersion(env, disp, &major_ver, &minor_ver))
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return false;
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return major_ver >= 2;
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}
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JNIEXPORT jboolean JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nIsXrandrSupported(JNIEnv *env, jclass unused, jlong display) {
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Display *disp = (Display *)(intptr_t)display;
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jboolean result = isXrandrSupported(env, disp) ? JNI_TRUE : JNI_FALSE;
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return result;
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}
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JNIEXPORT jboolean JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nIsXF86VidModeSupported(JNIEnv *env, jclass unused, jlong display) {
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Display *disp = (Display *)(intptr_t)display;
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jboolean result = isXF86VidModeSupported(env, disp) ? JNI_TRUE : JNI_FALSE;
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return result;
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}
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static mode_info *getXrandrDisplayModes(Display *disp, int screen, int *num_modes) {
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int num_randr_sizes;
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XRRScreenSize *sizes = XRRSizes(disp, screen, &num_randr_sizes);
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mode_info *avail_modes = NULL;
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int list_size = 0;
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/* Count number of modes */
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int i;
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int mode_index = 0;
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for (i = 0; i < num_randr_sizes; i++) {
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int num_randr_rates;
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short *freqs = XRRRates(disp, screen, i, &num_randr_rates);
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int j;
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for (j = 0; j < num_randr_rates; j++) {
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if (list_size <= mode_index) {
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list_size += 1;
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avail_modes = (mode_info *)realloc(avail_modes, sizeof(mode_info)*list_size);
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if (avail_modes == NULL)
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return NULL;
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}
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avail_modes[mode_index].width = sizes[i].width;
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avail_modes[mode_index].height = sizes[i].height;
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avail_modes[mode_index].freq = freqs[j];
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avail_modes[mode_index].mode_data.size_index = i;
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mode_index++;
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}
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}
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*num_modes = mode_index;
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return avail_modes;
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}
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static mode_info *getXF86VidModeDisplayModes(Display *disp, int screen, int *num_modes) {
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int num_xf86vm_modes;
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XF86VidModeModeInfo **avail_xf86vm_modes;
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XF86VidModeGetAllModeLines(disp, screen, &num_xf86vm_modes, &avail_xf86vm_modes);
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mode_info *avail_modes = (mode_info *)malloc(sizeof(mode_info)*num_xf86vm_modes);
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if (avail_modes == NULL) {
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XFree(avail_xf86vm_modes);
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return NULL;
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}
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int i;
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for (i = 0; i < num_xf86vm_modes; i++) {
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avail_modes[i].width = avail_xf86vm_modes[i]->hdisplay;
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avail_modes[i].height = avail_xf86vm_modes[i]->vdisplay;
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avail_modes[i].freq = 0; // No frequency support in XF86VidMode
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avail_modes[i].mode_data.xf86vm_modeinfo = *avail_xf86vm_modes[i];
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}
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XFree(avail_xf86vm_modes);
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*num_modes = num_xf86vm_modes;
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return avail_modes;
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}
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static mode_info *getDisplayModes(Display *disp, int screen, jint extension, int *num_modes) {
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switch (extension) {
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case org_lwjgl_opengl_LinuxDisplay_XF86VIDMODE:
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return getXF86VidModeDisplayModes(disp, screen, num_modes);
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case org_lwjgl_opengl_LinuxDisplay_XRANDR:
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return getXrandrDisplayModes(disp, screen, num_modes);
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case org_lwjgl_opengl_LinuxDisplay_NONE:
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// fall through
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default:
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return NULL;
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}
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}
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static bool setXF86VidModeMode(Display *disp, int screen, mode_info *mode) {
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return True == XF86VidModeSwitchToMode(disp, screen, &mode->mode_data.xf86vm_modeinfo);
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}
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/* Try to set the mode specified through XRandR.
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* Return value is the Status code of the mode switch
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* The timestamp parameter is filled with the latest timestamp returned from XRRConfigTimes
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*/
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static Status trySetXrandrMode(Display *disp, int screen, mode_info *mode, Time *timestamp) {
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Status status;
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Drawable root_window = RootWindow(disp, screen);
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XRRScreenConfiguration *screen_configuration = XRRGetScreenInfo(disp, root_window);
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Time config_time;
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*timestamp = XRRConfigTimes(screen_configuration, &config_time);
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Rotation current_rotation;
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XRRConfigCurrentConfiguration(screen_configuration, ¤t_rotation);
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status = XRRSetScreenConfigAndRate(disp, screen_configuration, root_window, mode->mode_data.size_index, current_rotation, mode->freq, *timestamp);
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XRRFreeScreenConfigInfo(screen_configuration);
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return status;
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}
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static bool setXrandrMode(Display *disp, int screen, mode_info *mode) {
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int iteration;
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Time timestamp;
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Status status = trySetXrandrMode(disp, screen, mode, ×tamp);
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if (status == 0)
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return true; // Success
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Time new_timestamp;
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for (iteration = 0; iteration < NUM_XRANDR_RETRIES; iteration++) {
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status = trySetXrandrMode(disp, screen, mode, &new_timestamp);
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if (status == 0)
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return true; // Success
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if (new_timestamp == timestamp) {
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return false; // Failure, and the stamps are equal meaning that the failure is not merely transient
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}
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timestamp = new_timestamp;
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}
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return false;
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}
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static bool setMode(JNIEnv *env, Display *disp, int screen, jint extension, int width, int height, int freq) {
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int num_modes, i;
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mode_info *avail_modes = getDisplayModes(disp, screen, extension, &num_modes);
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if (avail_modes == NULL) {
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printfDebugJava(env, "Could not get display modes");
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return false;
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}
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bool result = false;
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for (i = 0; i < num_modes; ++i) {
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printfDebugJava(env, "Mode %d: %dx%d @%d", i, avail_modes[i].width, avail_modes[i].height, avail_modes[i].freq);
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if (avail_modes[i].width == width && avail_modes[i].height == height && avail_modes[i].freq == freq) {
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switch (extension) {
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case org_lwjgl_opengl_LinuxDisplay_XF86VIDMODE:
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if (!setXF86VidModeMode(disp, screen, &avail_modes[i])) {
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printfDebugJava(env, "Could not switch mode");
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continue;
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}
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break;
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case org_lwjgl_opengl_LinuxDisplay_XRANDR:
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if (!setXrandrMode(disp, screen, &avail_modes[i])) {
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printfDebugJava(env, "Could not switch mode");
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continue;
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}
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break;
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case org_lwjgl_opengl_LinuxDisplay_NONE: // Should never happen, since NONE imply no available display modes
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default: // Should never happen
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continue;
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}
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result = true;
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break;
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}
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}
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free(avail_modes);
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XFlush(disp);
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return result;
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}
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static int getGammaRampLengthOfDisplay(JNIEnv *env, Display *disp, int screen) {
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int ramp_size;
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if (XF86VidModeGetGammaRampSize(disp, screen, &ramp_size) == False) {
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throwException(env, "XF86VidModeGetGammaRampSize call failed");
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return 0;
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}
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return ramp_size;
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}
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JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nConvertToNativeRamp(JNIEnv *env, jclass unused, jobject ramp_buffer, jint buffer_offset, jint length) {
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const jfloat *ramp_ptr = (const jfloat *)(*env)->GetDirectBufferAddress(env, ramp_buffer) + buffer_offset;
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jobject native_ramp = newJavaManagedByteBuffer(env, length*3*sizeof(unsigned short));
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if (native_ramp == NULL) {
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throwException(env, "Failed to allocate gamma ramp buffer");
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return NULL;
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}
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unsigned short *native_ramp_ptr = (unsigned short *)(*env)->GetDirectBufferAddress(env, native_ramp);
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int i;
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for (i = 0; i < length; i++) {
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float scaled_gamma = ramp_ptr[i]*0xffff;
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short scaled_gamma_short = (unsigned short)roundf(scaled_gamma);
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native_ramp_ptr[i] = scaled_gamma_short;
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native_ramp_ptr[i + length] = scaled_gamma_short;
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native_ramp_ptr[i + length*2] = scaled_gamma_short;
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}
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return native_ramp;
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}
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JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGetCurrentGammaRamp(JNIEnv *env, jclass unused, jlong display, jint screen) {
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Display *disp = (Display *)(intptr_t)display;
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int ramp_size = getGammaRampLengthOfDisplay(env, disp, screen);
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jobject ramp_buffer = newJavaManagedByteBuffer(env, sizeof(unsigned short)*3*ramp_size);
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if (ramp_buffer == NULL) {
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throwException(env, "Could not allocate gamma ramp buffer");
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return NULL;
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}
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unsigned short *ramp = (unsigned short *)(*env)->GetDirectBufferAddress(env, ramp_buffer);
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if (!XF86VidModeGetGammaRamp(disp, screen, ramp_size, ramp, ramp + ramp_size, ramp + ramp_size*2)) {
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throwException(env, "Could not get the current gamma ramp");
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return NULL;
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}
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return ramp_buffer;
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}
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static void setGamma(JNIEnv *env, Display *disp, int screen, jobject ramp_buffer) {
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if (ramp_buffer == NULL)
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return;
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unsigned short *ramp_ptr = (unsigned short *)(*env)->GetDirectBufferAddress(env, ramp_buffer);
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jlong capacity = (*env)->GetDirectBufferCapacity(env, ramp_buffer);
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int size = capacity/(sizeof(unsigned short)*3);
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if (size == 0)
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return;
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if (XF86VidModeSetGammaRamp(disp, screen, size, ramp_ptr, ramp_ptr + size, ramp_ptr + size*2) == False) {
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throwException(env, "Could not set gamma ramp.");
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}
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}
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static bool switchDisplayMode(JNIEnv * env, Display *disp, int screen, jint extension, jobject mode) {
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if (mode == NULL) {
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throwException(env, "mode must be non-null");
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return false;
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}
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jclass cls_displayMode = (*env)->GetObjectClass(env, mode);
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jfieldID fid_width = (*env)->GetFieldID(env, cls_displayMode, "width", "I");
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jfieldID fid_height = (*env)->GetFieldID(env, cls_displayMode, "height", "I");
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jfieldID fid_freq = (*env)->GetFieldID(env, cls_displayMode, "freq", "I");
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int width = (*env)->GetIntField(env, mode, fid_width);
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int height = (*env)->GetIntField(env, mode, fid_height);
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int freq = (*env)->GetIntField(env, mode, fid_freq);
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if (!setMode(env, disp, screen, extension, width, height, freq)) {
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throwException(env, "Could not switch mode.");
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return false;
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}
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return true;
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}
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static jobjectArray getAvailableDisplayModes(JNIEnv * env, Display *disp, int screen, jint extension) {
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int num_modes, i;
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mode_info *avail_modes;
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int bpp = XDefaultDepth(disp, screen);
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avail_modes = getDisplayModes(disp, screen, extension, &num_modes);
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if (avail_modes == NULL) {
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printfDebugJava(env, "Could not get display modes");
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return NULL;
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}
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// Allocate an array of DisplayModes big enough
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jclass displayModeClass = (*env)->FindClass(env, "org/lwjgl/opengl/DisplayMode");
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jobjectArray ret = (*env)->NewObjectArray(env, num_modes, displayModeClass, NULL);
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jmethodID displayModeConstructor = (*env)->GetMethodID(env, displayModeClass, "<init>", "(IIII)V");
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for (i = 0; i < num_modes; i++) {
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jobject displayMode = (*env)->NewObject(env, displayModeClass, displayModeConstructor, avail_modes[i].width, avail_modes[i].height, bpp, avail_modes[i].freq);
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(*env)->SetObjectArrayElement(env, ret, i, displayMode);
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}
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free(avail_modes);
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return ret;
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}
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static jobject getCurrentXRandrMode(JNIEnv * env, Display *disp, int screen) {
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Drawable root_window = RootWindow(disp, screen);
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XRRScreenConfiguration *config = XRRGetScreenInfo(disp, root_window);
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if (config == NULL) {
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throwException(env, "Could not get current screen configuration.");
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return NULL;
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}
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short rate = XRRConfigCurrentRate(config);
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Rotation current_rotation;
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SizeID size_index = XRRConfigCurrentConfiguration(config, ¤t_rotation);
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int n_sizes;
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XRRScreenSize *sizes = XRRConfigSizes(config, &n_sizes);
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if (size_index >= n_sizes) {
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throwFormattedException(env, "Xrandr current index (%d) is larger than or equals to the number of sizes (%d).", size_index, n_sizes);
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XRRFreeScreenConfigInfo(config);
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return NULL;
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}
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XRRScreenSize current_size = sizes[size_index];
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XRRFreeScreenConfigInfo(config);
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int bpp = XDefaultDepth(disp, screen);
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jclass displayModeClass = (*env)->FindClass(env, "org/lwjgl/opengl/DisplayMode");
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jmethodID displayModeConstructor = (*env)->GetMethodID(env, displayModeClass, "<init>", "(IIII)V");
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jobject displayMode = (*env)->NewObject(env, displayModeClass, displayModeConstructor, current_size.width, current_size.height, bpp, rate);
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return displayMode;
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}
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JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGetCurrentXRandrMode(JNIEnv *env, jclass unused, jlong display, jint screen) {
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Display *disp = (Display *)(intptr_t)display;
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return getCurrentXRandrMode(env, disp, screen);
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}
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JNIEXPORT jobjectArray JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGetAvailableDisplayModes(JNIEnv *env, jclass clazz, jlong display, jint screen, jint extension) {
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Display *disp = (Display *)(intptr_t)display;
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return getAvailableDisplayModes(env, disp, screen, extension);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nSwitchDisplayMode(JNIEnv *env, jclass clazz, jlong display, jint screen, jint extension, jobject mode) {
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Display *disp = (Display *)(intptr_t)display;
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switchDisplayMode(env, disp, screen, extension, mode);
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}
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JNIEXPORT jint JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nGetGammaRampLength(JNIEnv *env, jclass clazz, jlong display_ptr, jint screen) {
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Display *disp = (Display *)(intptr_t)display_ptr;
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return (jint)getGammaRampLengthOfDisplay(env, disp, screen);
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}
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JNIEXPORT void JNICALL Java_org_lwjgl_opengl_LinuxDisplay_nSetGammaRamp(JNIEnv *env, jclass clazz, jlong display, jint screen, jobject gamma_buffer) {
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Display *disp = (Display *)(intptr_t)display;
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setGamma(env, disp, screen, gamma_buffer);
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}
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