/*
* 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.
*/
/**
* $Id$
*
* Win32 specific library for display handling.
*
* @author cix_foo <cix_foo@users.sourceforge.net>
* @version $Revision$
*/
#include <windows.h>
// Multimon.h enables multi monitor emulation on win95 and winnt4
// So we only need the extended, multi-monitor aware path
#define COMPILE_MULTIMON_STUBS
#include <Multimon.h>
#include <jni.h>
#include "display.h"
#include "common_tools.h"
#define WINDOWCLASSNAME "LWJGLWINDOW"
#define GAMMA_SIZE (3*256)
static jobjectArray GetAvailableDisplayModesEx(JNIEnv * env);
static char * getDriver();
static bool modeSet = false; // Whether we've done a display mode change
static WORD originalGamma[GAMMA_SIZE]; // Original gamma settings
static WORD currentGamma[GAMMA_SIZE]; // Current gamma settings
static DEVMODE devmode; // Now we'll remember this value for the future
extern HWND display_hwnd; // Handle to the window
jobjectArray getAvailableDisplayModes(JNIEnv *env)
{
jobjectArray result = GetAvailableDisplayModesEx(env);
return result;
}
/**
* Choose displaymodes using extended codepath (multiple displaydevices)
*/
static jobjectArray GetAvailableDisplayModesEx(JNIEnv * env) {
int i = 0, j = 0, n = 0;
DISPLAY_DEVICE DisplayDevice;
DEVMODE DevMode;
jobject *display_mode_objects = NULL;
int list_size = 0;
jclass displayModeClass;
jobjectArray ret;
jmethodID displayModeConstructor;
ZeroMemory(&DevMode, sizeof(DEVMODE));
ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
DevMode.dmSize = sizeof(DEVMODE);
DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
displayModeClass = (*env)->FindClass(env, "org/lwjgl/opengl/DisplayMode");
displayModeConstructor = (*env)->GetMethodID(env, displayModeClass, "<init>", "(IIII)V");
while(EnumDisplayDevices(NULL, i++, &DisplayDevice, 0) != 0) {
// continue if mirroring device
if((DisplayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER) != 0) {
continue;
}
j = 0;
while(EnumDisplaySettings((const char *) DisplayDevice.DeviceName, j++, &DevMode) != 0) {
// Filter out indexed modes
if (DevMode.dmBitsPerPel > 8 && ChangeDisplaySettings(&DevMode, CDS_FULLSCREEN | CDS_TEST) == DISP_CHANGE_SUCCESSFUL) {
jobject displayMode;
if (list_size <= n) {
list_size += 1;
display_mode_objects = (jobject *)realloc(display_mode_objects, sizeof(jobject)*list_size);
if (display_mode_objects == NULL)
return NULL;
}
displayMode = (*env)->NewObject(env, displayModeClass, displayModeConstructor,
DevMode.dmPelsWidth, DevMode.dmPelsHeight,
DevMode.dmBitsPerPel, DevMode.dmDisplayFrequency);
display_mode_objects[n++] = displayMode;
}
}
}
printfDebug("Found %d displaymodes\n", n);
ret = (*env)->NewObjectArray(env, n, displayModeClass, NULL);
for (i = 0; i < n; i++) {
(*env)->SetObjectArrayElement(env, ret, i, display_mode_objects[i]);
}
free(display_mode_objects);
return ret;
}
void switchDisplayMode(JNIEnv * env, jobject mode)
{
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_bpp = (*env)->GetFieldID(env, cls_displayMode, "bpp", "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 bpp = (*env)->GetIntField(env, mode, fid_bpp);
int freq = (*env)->GetIntField(env, mode, fid_freq);
LONG cdsret;
devmode.dmSize = sizeof(DEVMODE);
devmode.dmBitsPerPel = bpp;
devmode.dmPelsWidth = width;
devmode.dmPelsHeight = height;
devmode.dmDisplayFlags = 0;
devmode.dmDisplayFrequency = freq;
devmode.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFLAGS;
if (freq != 0)
devmode.dmFields |= DM_DISPLAYFREQUENCY;
cdsret = ChangeDisplaySettings(&devmode, CDS_FULLSCREEN);
if (cdsret != DISP_CHANGE_SUCCESSFUL) {
// Failed: so let's check to see if it's a wierd dual screen display
printfDebug("Failed to set display mode... assuming dual monitors\n");
devmode.dmPelsWidth = width * 2;
cdsret = ChangeDisplaySettings(&devmode, CDS_FULLSCREEN);
if (cdsret != DISP_CHANGE_SUCCESSFUL) {
printfDebug("Failed to set display mode using dual monitors\n");
throwException(env, "Failed to set display mode.");
return;
}
}
modeSet = true;
}
int getGammaRampLength(void)
{
return 256;
}
void setGammaRamp(JNIEnv * env, jobject gammaRampBuffer)
{
int i;
float scaledRampEntry;
WORD rampEntry;
HDC screenDC;
const float *gammaRamp = (const float *)(*env)->GetDirectBufferAddress(env, gammaRampBuffer);
// Turn array of floats into array of RGB WORDs
for (i = 0; i < 256; i ++) {
scaledRampEntry = gammaRamp[i]*0xffff;
rampEntry = (WORD)scaledRampEntry;
currentGamma[i] = rampEntry;
currentGamma[i + 256] = rampEntry;
currentGamma[i + 512] = rampEntry;
}
screenDC = GetDC(NULL);
if (SetDeviceGammaRamp(screenDC, currentGamma) == FALSE) {
throwException(env, "Failed to set device gamma.");
}
ReleaseDC(NULL, screenDC);
}
jobject initDisplay(JNIEnv * env)
{
int width;
int height;
int bpp;
int freq;
jclass jclass_DisplayMode;
jmethodID ctor;
jobject newMode;
// Determine the current screen resolution
// Get the screen
HDC screenDC = GetDC(NULL);
if (!screenDC) {
throwException(env, "Couldn't get screen DC!");
return NULL;
}
// Get the device caps
width = GetDeviceCaps(screenDC, HORZRES);
height = GetDeviceCaps(screenDC, VERTRES);
bpp = GetDeviceCaps(screenDC, BITSPIXEL);
freq = GetDeviceCaps(screenDC, VREFRESH);
if (freq <= 1)
freq = 0; // Unknown
jclass_DisplayMode = (*env)->FindClass(env, "org/lwjgl/opengl/DisplayMode");
ctor = (*env)->GetMethodID(env, jclass_DisplayMode, "<init>", "(IIII)V");
newMode = (*env)->NewObject(env, jclass_DisplayMode, ctor, width, height, bpp, freq);
// Get the default gamma ramp
if (GetDeviceGammaRamp(screenDC, originalGamma) == FALSE) {
printfDebug("Failed to get initial device gamma\n");
}
memcpy(currentGamma, originalGamma, sizeof(WORD)*GAMMA_SIZE);
ReleaseDC(NULL, screenDC);
return newMode;
}
void resetDisplayMode(JNIEnv * env) {
// Return device gamma to normal
HDC screenDC = GetDC(NULL);
if (!SetDeviceGammaRamp(screenDC, originalGamma)) {
printfDebug("Could not reset device gamma\n");
}
ReleaseDC(NULL, screenDC);
if (modeSet) {
modeSet = false;
// Under Win32, all we have to do is:
ChangeDisplaySettings(NULL, 0);
// And we'll call init() again to put the correct mode back in Display
if (env != NULL)
initDisplay(env);
}
}
/*
* Put display settings back to what they were when the window is maximized.
*/
void restoreDisplayMode(void) {
// Restore gamma
HDC screenDC = GetDC(NULL);
LONG cdsret;
if (!SetDeviceGammaRamp(screenDC, currentGamma)) {
printfDebug("Could not restore device gamma\n");
}
ReleaseDC(NULL, screenDC);
if (!modeSet) {
printfDebug("Attempting to restore the display mode\n");
modeSet = true;
cdsret = ChangeDisplaySettings(&devmode, CDS_FULLSCREEN);
if (cdsret != DISP_CHANGE_SUCCESSFUL) {
printfDebug("Failed to restore display mode\n");
}
}
}
static char * getDriver() {
#define MY_BUFSIZE 256
HKEY hKey;
static TCHAR szAdapterKey[MY_BUFSIZE], szDriverValue[MY_BUFSIZE];
DWORD dwBufLen = MY_BUFSIZE;
LONG lRet;
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,
TEXT("HARDWARE\\DeviceMap\\Video"),
0,
KEY_QUERY_VALUE,
&hKey) != ERROR_SUCCESS) return NULL;
lRet = RegQueryValueEx(hKey,
TEXT("\\Device\\Video0"),
NULL,
NULL,
(LPBYTE)szAdapterKey,
&dwBufLen);
RegCloseKey(hKey);
if(lRet != ERROR_SUCCESS) return NULL;
printfDebug("Adapter key: %s\n", szAdapterKey);
// szAdapterKey now contains something like \Registry\Machine\System\CurrentControlSet\Control\Video\{B70DBD2A-90C4-41CF-A58E-F3BA69F1A6BC}\0000
// We'll check for the first chunk:
if (strnicmp("\\Registry\\Machine", szAdapterKey, 17) == 0) {
// Yes, it's right, so let's look for that key now
TCHAR szDriverKey[MY_BUFSIZE];
strcpy(szDriverKey, &szAdapterKey[18]);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,
TEXT(szDriverKey),
0,
KEY_QUERY_VALUE,
&hKey) != ERROR_SUCCESS) return NULL;
lRet = RegQueryValueEx(hKey,
TEXT("InstalledDisplayDrivers"),
NULL,
NULL,
(LPBYTE)szDriverValue,
&dwBufLen);
RegCloseKey(hKey);
}
if(lRet != ERROR_SUCCESS) return NULL;
return szDriverValue;
}
jstring getAdapter(JNIEnv * env)
{
jstring ret = NULL;
char *driver = getDriver();
if (driver == NULL) {
return NULL;
}
ret = NewStringNative(env, driver);
return ret;
}
jstring getVersion(JNIEnv * env)
{
jstring ret = NULL;
TCHAR driverDLL[256] = "\0";
DWORD var = 0;
DWORD dwInfoSize;
LPVOID lpInfoBuff;
BOOL bRetval;
char *driver = getDriver();
if (driver == NULL) {
return NULL;
}
strcat(driverDLL, driver);
strcat(driverDLL, ".dll");
dwInfoSize = GetFileVersionInfoSize(driverDLL, &var);
lpInfoBuff = malloc(dwInfoSize);
bRetval = GetFileVersionInfo(driverDLL, 0, dwInfoSize, lpInfoBuff);
if (bRetval == 0) {
} else {
VS_FIXEDFILEINFO * fxdFileInfo;
UINT uiLen = 0;
bRetval = VerQueryValue(lpInfoBuff, TEXT("\\"), (void **) &fxdFileInfo, &uiLen);
if (bRetval != 0) {
TCHAR version[256];
TCHAR ms[10], ls[10];
sprintf(ms, "%d.%d\0", fxdFileInfo->dwProductVersionMS >> 16, fxdFileInfo->dwProductVersionMS & 0xFFFF);
sprintf(ls, "%d.%d\0", fxdFileInfo->dwProductVersionLS >> 16, fxdFileInfo->dwProductVersionLS & 0xFFFF);
sprintf(version, "%s.%s\0", ms, ls);
ret = NewStringNative(env, version);
}
}
free(lpInfoBuff);
return ret;
}
