/*
* Copyright (c) 2002-2004 LWJGL Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'LWJGL' nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* $Id$
*
* Linux specific library for display handling.
*
* @author elias_naur <elias_naur@users.sourceforge.net>
* @version $Revision$
*/
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/extensions/xf86vmode.h>
#include <X11/extensions/Xrandr.h>
#include <X11/Xutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "display.h"
#include "common_tools.h"
#include "Window.h"
typedef struct {
int width;
int height;
int freq;
union {
int size_index; // Data for Xrandr extension
XF86VidModeModeInfo xf86vm_modeinfo; // Data for XF86VidMode extension
} mode_data;
} mode_info;
static int saved_width;
static int saved_height;
static int saved_freq;
static int current_width;
static int current_height;
static int current_freq;
static int saved_gamma_ramp_length = 0;
static unsigned short *r_ramp = NULL;
static unsigned short *g_ramp = NULL;
static unsigned short *b_ramp = NULL;
static unsigned short *current_ramp = NULL;
static int current_gamma_ramp_length = 0;
static extension current_extension = NONE;
int getScreenModeWidth(void) {
return current_width;
}
int getScreenModeHeight(void) {
return current_height;
}
extension getCurrentDisplayModeExtension(void) {
return current_extension;
}
static bool getXF86VidModeVersion(JNIEnv *env, Display *disp, int *major, int *minor) {
int event_base, error_base;
if (!XF86VidModeQueryExtension(disp, &event_base, &error_base)) {
printfDebugJava(env, "XF86VidMode extension not available");
return false;
}
if (!XF86VidModeQueryVersion(disp, major, minor)) {
printfDebugJava(env, "Could not query XF86VidMode version");
return false;
}
printfDebugJava(env, "XF86VidMode extension version %i.%i", *major, *minor);
return true;
}
static bool getXrandrVersion(JNIEnv *env, Display *disp, int *major, int *minor) {
int event_base, error_base;
if (!XRRQueryExtension(disp, &event_base, &error_base)) {
printfDebugJava(env, "Xrandr extension not available");
return false;
}
if (!XRRQueryVersion(disp, major, minor)) {
printfDebugJava(env, "Could not query Xrandr version");
return false;
}
printfDebugJava(env, "Xrandr extension version %i.%i", *major, *minor);
return true;
}
static bool isXrandrSupported(JNIEnv *env, Display *disp) {
int major, minor;
if (!getXrandrVersion(env, disp, &major, &minor))
return false;
return major >= 1;
}
static bool isXF86VidModeSupported(JNIEnv *env, Display *disp) {
int minor_ver, major_ver;
if (!getXF86VidModeVersion(env, disp, &major_ver, &minor_ver))
return false;
return major_ver >= 2;
}
static extension getBestDisplayModeExtension(JNIEnv *env, Display *disp) {
if (isXrandrSupported(env, disp)) {
printfDebugJava(env, "Using Xrandr for display mode switching");
return XRANDR;
} else if (isXF86VidModeSupported(env, disp)) {
printfDebugJava(env, "Using XF86VidMode for display mode switching");
return XF86VIDMODE;
} else {
printfDebugJava(env, "No display mode extensions available");
return NONE;
}
}
static mode_info *getXrandrDisplayModes(Display *disp, int screen, int *num_modes) {
int num_randr_sizes;
XRRScreenSize *sizes = XRRSizes(disp, screen, &num_randr_sizes);
mode_info *avail_modes = NULL;
int list_size = 0;
/* Count number of modes */
int i;
int mode_index = 0;
for (i = 0; i < num_randr_sizes; i++) {
int num_randr_rates;
short *freqs = XRRRates(disp, screen, i, &num_randr_rates);
int j;
for (j = 0; j < num_randr_rates; j++) {
if (list_size <= mode_index) {
list_size += 1;
avail_modes = (mode_info *)realloc(avail_modes, sizeof(mode_info)*list_size);
if (avail_modes == NULL)
return NULL;
}
avail_modes[mode_index].width = sizes[i].width;
avail_modes[mode_index].height = sizes[i].height;
avail_modes[mode_index].freq = freqs[j];
avail_modes[mode_index].mode_data.size_index = i;
mode_index++;
}
}
*num_modes = mode_index;
return avail_modes;
}
static mode_info *getXF86VidModeDisplayModes(Display *disp, int screen, int *num_modes) {
int num_xf86vm_modes;
XF86VidModeModeInfo **avail_xf86vm_modes;
XF86VidModeGetAllModeLines(disp, screen, &num_xf86vm_modes, &avail_xf86vm_modes);
mode_info *avail_modes = (mode_info *)malloc(sizeof(mode_info)*num_xf86vm_modes);
if (avail_modes == NULL) {
XFree(avail_xf86vm_modes);
return NULL;
}
int i;
for (i = 0; i < num_xf86vm_modes; i++) {
avail_modes[i].width = avail_xf86vm_modes[i]->hdisplay;
avail_modes[i].height = avail_xf86vm_modes[i]->vdisplay;
avail_modes[i].freq = 0; // No frequency support in XF86VidMode
avail_modes[i].mode_data.xf86vm_modeinfo = *avail_xf86vm_modes[i];
}
XFree(avail_xf86vm_modes);
*num_modes = num_xf86vm_modes;
return avail_modes;
}
static mode_info *getDisplayModes(Display *disp, int screen, int *num_modes) {
switch (current_extension) {
case XF86VIDMODE:
return getXF86VidModeDisplayModes(disp, screen, num_modes);
case XRANDR:
return getXrandrDisplayModes(disp, screen, num_modes);
case NONE:
// fall through
default:
// Should never happen
return NULL;
}
}
static bool setXF86VidModeMode(Display *disp, int screen, mode_info *mode) {
return True == XF86VidModeSwitchToMode(disp, screen, &mode->mode_data.xf86vm_modeinfo);
}
static bool setXrandrMode(Display *disp, int screen, mode_info *mode) {
Status success;
do {
Time config_time;
Drawable root_window = RootWindow(disp, screen);
XRRScreenConfiguration *screen_configuration = XRRGetScreenInfo (disp, root_window);
XRRConfigTimes(screen_configuration, &config_time);
Rotation current_rotation;
XRRConfigRotations(screen_configuration, ¤t_rotation);
success = XRRSetScreenConfigAndRate(disp, screen_configuration, root_window, mode->mode_data.size_index, current_rotation, mode->freq, config_time);
XRRFreeScreenConfigInfo(screen_configuration);
} while (success != 0);
return true;
}
static bool setMode(JNIEnv *env, Display *disp, int screen, int width, int height, int freq, bool temporary) {
if (current_extension == NONE)
return false;
int num_modes, i;
mode_info *avail_modes = getDisplayModes(disp, screen, &num_modes);
if (avail_modes == NULL || num_modes == 0) {
printfDebugJava(env, "Could not get display modes");
return false;
}
bool result = false;
for ( i = 0; i < num_modes; ++i ) {
printfDebugJava(env, "Mode %d: %dx%d @%d", i, avail_modes[i].width, avail_modes[i].height, avail_modes[i].freq);
if (avail_modes[i].width == width && avail_modes[i].height == height && avail_modes[i].freq == freq) {
switch (current_extension) {
case XF86VIDMODE:
if (!setXF86VidModeMode(disp, screen, &avail_modes[i])) {
printfDebugJava(env, "Could not switch mode");
continue;
}
break;
case XRANDR:
if (!setXrandrMode(disp, screen, &avail_modes[i])) {
printfDebugJava(env, "Could not switch mode");
continue;
}
break;
case NONE: // Should never happen
default: // Should never happen
continue;
}
result = true;
if (!temporary) {
current_width = width;
current_height = height;
current_freq = freq;
}
break;
}
}
free(avail_modes);
XFlush(disp);
return result;
}
static void freeSavedGammaRamps() {
free(r_ramp);
free(g_ramp);
free(b_ramp);
r_ramp = NULL;
g_ramp = NULL;
b_ramp = NULL;
saved_gamma_ramp_length = 0;
}
static int getGammaRampLengthOfDisplay(JNIEnv *env, Display *disp, int screen) {
int ramp_size;
if (!isXF86VidModeSupported(env, disp)) {
printfDebugJava(env, "XF86VidMode extension version >= 2 not found");
return 0;
}
if (XF86VidModeGetGammaRampSize(disp, screen, &ramp_size) == False) {
printfDebugJava(env, "XF86VidModeGetGammaRampSize call failed");
return 0;
}
return ramp_size;
}
int getGammaRampLength(JNIEnv *env, int screen) {
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
printfDebugJava(env, "Could not open display");
return 0;
}
int length = getGammaRampLengthOfDisplay(env, disp, screen);
XCloseDisplay(disp);
return length;
}
jobject initDisplay(JNIEnv *env, int screen) {
int num_modes;
mode_info *avail_modes;
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return NULL;
}
current_extension = getBestDisplayModeExtension(env, disp);
if (current_extension == NONE) {
throwException(env, "No display mode extension is available");
XCloseDisplay(disp);
return NULL;
}
avail_modes = getDisplayModes(disp, screen, &num_modes);
if (avail_modes == NULL) {
throwException(env, "Could not get display modes");
XCloseDisplay(disp);
return NULL;
}
saved_width = current_width = avail_modes[0].width;
saved_height = current_height = avail_modes[0].height;
saved_freq = current_freq = avail_modes[0].freq;
int bpp = XDefaultDepth(disp, screen);
printfDebugJava(env, "Original display dimensions: width %d, height %d freq %d", saved_width, saved_height, saved_freq);
jclass jclass_DisplayMode = (*env)->FindClass(env, "org/lwjgl/opengl/DisplayMode");
jmethodID ctor = (*env)->GetMethodID(env, jclass_DisplayMode, "<init>", "(IIII)V");
jobject newMode = (*env)->NewObject(env, jclass_DisplayMode, ctor, saved_width, saved_height, bpp, saved_freq);
free(avail_modes);
/* Fetch the current gamma ramp */
saved_gamma_ramp_length = getGammaRampLengthOfDisplay(env, disp, screen);
if (saved_gamma_ramp_length > 0) {
r_ramp = (unsigned short *)malloc(sizeof(unsigned short)*saved_gamma_ramp_length);
g_ramp = (unsigned short *)malloc(sizeof(unsigned short)*saved_gamma_ramp_length);
b_ramp = (unsigned short *)malloc(sizeof(unsigned short)*saved_gamma_ramp_length);
if (!XF86VidModeGetGammaRamp(disp, screen, saved_gamma_ramp_length, r_ramp, g_ramp, b_ramp))
freeSavedGammaRamps();
}
XCloseDisplay(disp);
return newMode;
}
static void freeCurrentGamma(void) {
if (current_ramp != NULL) {
free(current_ramp);
current_ramp = NULL;
current_gamma_ramp_length = 0;
}
}
static void setCurrentGamma(Display *disp, int screen, JNIEnv *env) {
if (current_gamma_ramp_length == 0)
return;
if (XF86VidModeSetGammaRamp(disp, screen, current_gamma_ramp_length, current_ramp, current_ramp, current_ramp) == False) {
if (env != NULL)
throwException(env, "Could not set gamma ramp.");
else
printfDebugJava(env, "Could not set gamma ramp");
}
}
void temporaryRestoreMode(JNIEnv *env, int screen) {
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
printfDebugJava(env, "Could not open display");
return;
}
if (!setMode(env, disp, screen, current_width, current_height, current_freq, false))
printfDebugJava(env, "Could not restore mode");
setCurrentGamma(disp, screen, NULL);
XCloseDisplay(disp);
// Don't propagate error to caller
}
void switchDisplayMode(JNIEnv * env, jobject mode, int screen) {
if (mode == NULL) {
throwException(env, "mode must be non-null");
return;
}
jclass cls_displayMode = (*env)->GetObjectClass(env, mode);
jfieldID fid_width = (*env)->GetFieldID(env, cls_displayMode, "width", "I");
jfieldID fid_height = (*env)->GetFieldID(env, cls_displayMode, "height", "I");
jfieldID fid_freq = (*env)->GetFieldID(env, cls_displayMode, "freq", "I");
int width = (*env)->GetIntField(env, mode, fid_width);
int height = (*env)->GetIntField(env, mode, fid_height);
int freq = (*env)->GetIntField(env, mode, fid_freq);
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return;
}
if (!setMode(env, disp, screen, width, height, freq, false))
throwException(env, "Could not switch mode.");
XCloseDisplay(disp);
}
void resetDisplayMode(JNIEnv *env, int screen, bool temporary) {
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
printfDebugJava(env, "Failed to contact X Server");
return;
}
if (!setMode(env, disp, screen, saved_width, saved_height, saved_freq, temporary)) {
printfDebugJava(env, "Failed to reset mode");
}
if (saved_gamma_ramp_length > 0) {
XF86VidModeSetGammaRamp(disp, screen, saved_gamma_ramp_length, r_ramp, g_ramp, b_ramp);
}
// decDisplay();
XCloseDisplay(disp);
}
jobjectArray getAvailableDisplayModes(JNIEnv * env, int screen) {
int num_modes, i;
mode_info *avail_modes;
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return NULL;
}
int bpp = XDefaultDepth(disp, screen);
avail_modes = getDisplayModes(disp, screen, &num_modes);
if (avail_modes == NULL) {
printfDebugJava(env, "Could not get display modes");
XCloseDisplay(disp);
return NULL;
}
// Allocate an array of DisplayModes big enough
jclass displayModeClass = (*env)->FindClass(env, "org/lwjgl/opengl/DisplayMode");
jobjectArray ret = (*env)->NewObjectArray(env, num_modes, displayModeClass, NULL);
jmethodID displayModeConstructor = (*env)->GetMethodID(env, displayModeClass, "<init>", "(IIII)V");
for (i = 0; i < num_modes; i++) {
jobject displayMode = (*env)->NewObject(env, displayModeClass, displayModeConstructor, avail_modes[i].width, avail_modes[i].height, bpp, avail_modes[i].freq);
(*env)->SetObjectArrayElement(env, ret, i, displayMode);
}
free(avail_modes);
XCloseDisplay(disp);
return ret;
}
void setGammaRamp(JNIEnv *env, jobject gamma_ramp_buffer, int screen) {
Display * disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return;
}
freeCurrentGamma();
current_gamma_ramp_length = getGammaRampLengthOfDisplay(env, disp, screen);
if (current_gamma_ramp_length == 0) {
throwException(env, "Gamma ramp not supported");
return;
}
const float *gamma_ramp = (const float *)(*env)->GetDirectBufferAddress(env, gamma_ramp_buffer);
current_ramp = (unsigned short *)malloc(sizeof(unsigned short)*current_gamma_ramp_length);
int i;
for (i = 0; i < current_gamma_ramp_length; i++) {
float scaled_gamma = gamma_ramp[i]*0xffff;
current_ramp[i] = (unsigned short)round(scaled_gamma);
}
setCurrentGamma(disp, screen, env);
XCloseDisplay(disp);
}
