/*
* 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
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* 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/Xutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "display.h"
#include "common_tools.h"
#include "Window.h"
static int saved_width;
static int saved_height;
static int gamma_ramp_length = 0;
static unsigned short *r_ramp;
static unsigned short *g_ramp;
static unsigned short *b_ramp;
static bool getVidModeExtensionVersion(Display *disp, int screen, int *major, int *minor) {
int event_base, error_base;
if (!XF86VidModeQueryExtension(disp, &event_base, &error_base)) {
printfDebug("XF86VidMode extension not available\n");
return false;
}
if (!XF86VidModeQueryVersion(disp, major, minor)) {
printfDebug("Could not determine XF86VidMode version\n");
return false;
}
printfDebug("XF86VidMode extension version %i.%i\n", *major, *minor);
return true;
}
static bool getDisplayModes(Display *disp, int screen, int *num_modes, XF86VidModeModeInfo ***avail_modes) {
int minor_ver, major_ver;
if (!getVidModeExtensionVersion(disp, screen, &major_ver, &minor_ver))
return false;
XF86VidModeGetAllModeLines(disp, screen, num_modes, avail_modes);
return true;
}
static bool setMode(Display *disp, int screen, int width, int height, bool lock_mode) {
int num_modes, i;
XF86VidModeModeInfo **avail_modes;
if (!getDisplayModes(disp, screen, &num_modes, &avail_modes)) {
printfDebug("Could not get display modes\n");
return false;
}
XF86VidModeLockModeSwitch(disp, screen, 0);
for ( i = 0; i < num_modes; ++i ) {
printfDebug("Mode %d: %dx%d\n", i, avail_modes[i]->hdisplay, avail_modes[i]->vdisplay);
if (avail_modes[i]->hdisplay == width && avail_modes[i]->vdisplay == height) {
if (!XF86VidModeSwitchToMode(disp, screen, avail_modes[i])) {
printfDebug("Could not switch mode\n");
break;
}
if (lock_mode)
XF86VidModeLockModeSwitch(disp, screen, 1);
XFree(avail_modes);
return true;
}
}
XFree(avail_modes);
XFlush(disp);
return false;
}
static void freeSavedGammaRamps() {
free(r_ramp);
free(g_ramp);
free(b_ramp);
r_ramp = NULL;
g_ramp = NULL;
b_ramp = NULL;
gamma_ramp_length = 0;
}
static int getGammaRampLength(Display *disp, int screen) {
int minor_ver, major_ver, ramp_size;
if (!getVidModeExtensionVersion(disp, screen, &major_ver, &minor_ver) || major_ver < 2) {
printfDebug("XF86VidMode extension version >= 2 not found\n");
return 0;
}
if (XF86VidModeGetGammaRampSize(disp, screen, &ramp_size) == False) {
printfDebug("XF86VidModeGetGammaRampSize call failed\n");
return 0;
}
return ramp_size;
}
jobject initDisplay(JNIEnv *env) {
int num_modes;
XF86VidModeModeInfo **avail_modes;
int screen;
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return NULL;
}
screen = DefaultScreen(disp);
if (!getDisplayModes(disp, screen, &num_modes, &avail_modes)) {
printfDebug("Could not get display modes\n");
}
saved_width = avail_modes[0]->hdisplay;
saved_height = avail_modes[0]->vdisplay;
int bpp = XDefaultDepth(disp, screen);
printfDebug("Original display dimensions: width %d, height %d\n", saved_width, saved_height);
jclass jclass_DisplayMode = env->FindClass("org/lwjgl/opengl/DisplayMode");
jmethodID ctor = env->GetMethodID(jclass_DisplayMode, "<init>", "(IIII)V");
jobject newMode = env->NewObject(jclass_DisplayMode, ctor, saved_width, saved_height, bpp, 0);
XFree(avail_modes);
/* Fetch the current gamma ramp */
gamma_ramp_length = getGammaRampLength(disp, screen);
if (gamma_ramp_length > 0) {
r_ramp = (unsigned short *)malloc(sizeof(unsigned short)*gamma_ramp_length);
g_ramp = (unsigned short *)malloc(sizeof(unsigned short)*gamma_ramp_length);
b_ramp = (unsigned short *)malloc(sizeof(unsigned short)*gamma_ramp_length);
if (!XF86VidModeGetGammaRamp(disp, screen, gamma_ramp_length, r_ramp, g_ramp, b_ramp))
freeSavedGammaRamps();
}
XCloseDisplay(disp);
return newMode;
}
void switchDisplayMode(JNIEnv * env, jobject mode) {
if (mode == NULL) {
throwException(env, "mode must be non-null");
return;
}
jclass cls_displayMode = env->GetObjectClass(mode);
jfieldID fid_width = env->GetFieldID(cls_displayMode, "width", "I");
jfieldID fid_height = env->GetFieldID(cls_displayMode, "height", "I");
int width = env->GetIntField(mode, fid_width);
int height = env->GetIntField(mode, fid_height);
int screen;
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return;
}
screen = DefaultScreen(disp);
if (!setMode(disp, screen, width, height, true))
throwException(env, "Could not switch mode.");
XCloseDisplay(disp);
}
void resetDisplayMode(JNIEnv *env) {
int screen;
Display *disp = XOpenDisplay(NULL);
// Display *disp = incDisplay(env);
if (disp == NULL)
return;
screen = DefaultScreen(disp);
if (!setMode(disp, screen, saved_width, saved_height, false)) {
printfDebug("Failed to reset mode");
}
if (gamma_ramp_length > 0) {
XF86VidModeSetGammaRamp(disp, screen, gamma_ramp_length, r_ramp, g_ramp, b_ramp);
freeSavedGammaRamps();
}
// decDisplay();
XCloseDisplay(disp);
}
jobjectArray getAvailableDisplayModes(JNIEnv * env) {
int num_modes, i;
int screen;
XF86VidModeModeInfo **avail_modes;
Display *disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return NULL;
}
screen = DefaultScreen(disp);
int bpp = XDefaultDepth(disp, screen);
if (!getDisplayModes(disp, screen, &num_modes, &avail_modes)) {
printfDebug("Could not get display modes\n");
XCloseDisplay(disp);
return NULL;
}
// Allocate an array of DisplayModes big enough
jclass displayModeClass = env->FindClass("org/lwjgl/opengl/DisplayMode");
jobjectArray ret = env->NewObjectArray(num_modes, displayModeClass, NULL);
jmethodID displayModeConstructor = env->GetMethodID(displayModeClass, "<init>", "(IIII)V");
for (i = 0; i < num_modes; i++) {
jobject displayMode = env->NewObject(displayModeClass, displayModeConstructor, avail_modes[i]->hdisplay, avail_modes[i]->vdisplay, bpp, 0);
env->SetObjectArrayElement(ret, i, displayMode);
}
XFree(avail_modes);
XCloseDisplay(disp);
return ret;
}
int getGammaRampLength(void) {
return gamma_ramp_length;
}
void setGammaRamp(JNIEnv *env, jobject gamma_ramp_buffer) {
if (gamma_ramp_length == 0) {
throwException(env, "gamma ramp length == 0.");
return;
}
Display * disp = XOpenDisplay(NULL);
if (disp == NULL) {
throwException(env, "Could not open display");
return;
}
int screen = DefaultScreen(disp);
const float *gamma_ramp = (const float *)env->GetDirectBufferAddress(gamma_ramp_buffer);
unsigned short *ramp;
ramp = (unsigned short *)malloc(sizeof(unsigned short)*gamma_ramp_length);
for (int i = 0; i < gamma_ramp_length; i++) {
float scaled_gamma = gamma_ramp[i]*0xffff;
ramp[i] = (unsigned short)round(scaled_gamma);
}
if (XF86VidModeSetGammaRamp(disp, screen, gamma_ramp_length, ramp, ramp, ramp) == False) {
throwException(env, "Could not set gamma ramp.");
}
XCloseDisplay(disp);
}
