Screen mode retrieval/trace tool for Windows
I am trying to trace the sequence of screen mode (resolution/bpp/refresh rate) changes that occur when StarCraft is run in Windows so that I can make Wine emulate Windows' behavior. Right now I'm trying to see exactly what resolution, bits per pixel, and refresh rate StarCraft is using. Unfortunately, I can't just go into Display Properties while StarCraft is running because it switches the resolution back when you Alt-Tab out of the game. My current plan is to install an SSH or telnet server on the Windows machine and run a command line tool to check the current screen mode while StarCraft is running. I have used a couple of command-line tools for changing the screen mode [1] [2], but neither of them have an option to list the current mode. Does anyone know of a tool or can anyone quickly create a tool that will list the resolution currently in use from the command line? I have tried using StraceNT [3] to see the parameters passed to ChangeDisplaySettingsEx (which is the function StarCraft uses to change the resolution), but it does not let me look at the DEVMODE structure that is passed in. Does anyone know of a trace tool that would let me do that? Based on my testing so far, there appears to be a discrepancy in how Windows and Wine set the refresh rate if none is specified on a resolution change. Wine always picks the first mode with a matching resolution, while Windows does not. My tests in Windows have shown that even though StarCraft asks for 640x480 and the first mode with that resolution has a 60 Hz refresh rate, Windows chooses a higher refresh rate. Unfortunately, I don't know exactly which refresh rate, but I can verify by sight that 60 Hz is not being used (the screen doesn't flicker as it would at 60 Hz). This discrepancy is why I wish to run further tests and acquire more precise information about the refresh rate being used. I am performing this testing according to a request in a previous thread [4]. If you have any questions about my testing, please let me know. Denver 1. http://www.vrdevelopers.de/content/view/15/44/ 2. http://www.nirsoft.net/utils/nircmd.html 3. http://www.intellectualheaven.com/default.asp?BH=projects&H=strace.htm 4. http://www.winehq.org/pipermail/wine-devel/2008-March/063150.html
I think that you could just write a Windows application that listens for WM_DISPLAYCHANGE messages (that are generated when the ChangeDisplaySettingsEx succeeds) and logs the parameters recieved somewhere (keep in mind that wParam = new BPP; LOWORD(lParam) = new horizontal resolution; HIWORD(lParam) = new vertical resolution). If you need other infos about the screen settings just use the GetDeviceCaps API with the handle returned by GetDC(NULL) (see the MSDN for info about these APIs). If you need any help, I'm here. :-) Bye Matteo -----Original Message----- From: wine-devel-bounces(a)winehq.org [mailto:wine-devel-bounces(a)winehq.org] On Behalf Of Denver Gingerich Sent: Tuesday, March 04, 2008 11:09 PM To: wine-devel(a)winehq.org Subject: Screen mode retrieval/trace tool for Windows I am trying to trace the sequence of screen mode (resolution/bpp/refresh rate) changes that occur when StarCraft is run in Windows so that I can make Wine emulate Windows' behavior. Right now I'm trying to see exactly what resolution, bits per pixel, and refresh rate StarCraft is using. Unfortunately, I can't just go into Display Properties while StarCraft is running because it switches the resolution back when you Alt-Tab out of the game. My current plan is to install an SSH or telnet server on the Windows machine and run a command line tool to check the current screen mode while StarCraft is running. I have used a couple of command-line tools for changing the screen mode [1] [2], but neither of them have an option to list the current mode. Does anyone know of a tool or can anyone quickly create a tool that will list the resolution currently in use from the command line? I have tried using StraceNT [3] to see the parameters passed to ChangeDisplaySettingsEx (which is the function StarCraft uses to change the resolution), but it does not let me look at the DEVMODE structure that is passed in. Does anyone know of a trace tool that would let me do that? Based on my testing so far, there appears to be a discrepancy in how Windows and Wine set the refresh rate if none is specified on a resolution change. Wine always picks the first mode with a matching resolution, while Windows does not. My tests in Windows have shown that even though StarCraft asks for 640x480 and the first mode with that resolution has a 60 Hz refresh rate, Windows chooses a higher refresh rate. Unfortunately, I don't know exactly which refresh rate, but I can verify by sight that 60 Hz is not being used (the screen doesn't flicker as it would at 60 Hz). This discrepancy is why I wish to run further tests and acquire more precise information about the refresh rate being used. I am performing this testing according to a request in a previous thread [4]. If you have any questions about my testing, please let me know. Denver 1. http://www.vrdevelopers.de/content/view/15/44/ 2. http://www.nirsoft.net/utils/nircmd.html 3. http://www.intellectualheaven.com/default.asp?BH=projects&H=strace.htm 4. http://www.winehq.org/pipermail/wine-devel/2008-March/063150.html
Perhaps use detours to hook the ChangeDisplaySettingsEx function and dump the devmode structure to a file? Regards, mark On Wed, Mar 5, 2008 at 9:09 AM, Denver Gingerich <denver(a)ossguy.com> wrote:
I am trying to trace the sequence of screen mode (resolution/bpp/refresh rate) changes that occur when StarCraft is run in Windows so that I can make Wine emulate Windows' behavior. Right now I'm trying to see exactly what resolution, bits per pixel, and refresh rate StarCraft is using. Unfortunately, I can't just go into Display Properties while StarCraft is running because it switches the resolution back when you Alt-Tab out of the game.
My current plan is to install an SSH or telnet server on the Windows machine and run a command line tool to check the current screen mode while StarCraft is running. I have used a couple of command-line tools for changing the screen mode [1] [2], but neither of them have an option to list the current mode. Does anyone know of a tool or can anyone quickly create a tool that will list the resolution currently in use from the command line?
I have tried using StraceNT [3] to see the parameters passed to ChangeDisplaySettingsEx (which is the function StarCraft uses to change the resolution), but it does not let me look at the DEVMODE structure that is passed in. Does anyone know of a trace tool that would let me do that?
Based on my testing so far, there appears to be a discrepancy in how Windows and Wine set the refresh rate if none is specified on a resolution change. Wine always picks the first mode with a matching resolution, while Windows does not. My tests in Windows have shown that even though StarCraft asks for 640x480 and the first mode with that resolution has a 60 Hz refresh rate, Windows chooses a higher refresh rate. Unfortunately, I don't know exactly which refresh rate, but I can verify by sight that 60 Hz is not being used (the screen doesn't flicker as it would at 60 Hz). This discrepancy is why I wish to run further tests and acquire more precise information about the refresh rate being used.
I am performing this testing according to a request in a previous thread [4]. If you have any questions about my testing, please let me know.
Denver
1. http://www.vrdevelopers.de/content/view/15/44/ 2. http://www.nirsoft.net/utils/nircmd.html 3. http://www.intellectualheaven.com/default.asp?BH=projects&H=strace.htm 4. http://www.winehq.org/pipermail/wine-devel/2008-March/063150.html
Am Mittwoch, 5. März 2008 01:38:59 schrieb mark cox:
Perhaps use detours to hook the ChangeDisplaySettingsEx function and dump the devmode structure to a file? That's rather complex, a simple C app calling EnumDisplaySettingsEx(ENUM_CURRENT_MODE) called from command line should do that as well, and it is much easier to write
On Tue, Mar 4, 2008 at 5:33 PM, Stefan Dösinger <stefan(a)codeweavers.com> wrote:
Am Mittwoch, 5. März 2008 01:38:59 schrieb mark cox:
Perhaps use detours to hook the ChangeDisplaySettingsEx function and dump the devmode structure to a file? That's rather complex, a simple C app calling EnumDisplaySettingsEx(ENUM_CURRENT_MODE) called from command line should do that as well, and it is much easier to write
I'm having some trouble getting such an app compiled. I'm using MinGW 5.1.3 on Windows XP. Here's what's happening:
type x.c #include <windows.h>
int main() { DEVMODE dm; dm.dmSize = sizeof(dm); EnumDisplaySettingsEx(NULL, ENUM_CURRENT_SETTINGS, &dm, 0); return 0; }
gcc -c x.c
gcc -lgdi32 -luser32 -o x x.o -mwindows x.o:x.c:(.text+0x5e): undefined reference to `EnumDisplaySettingsExA' collect2: ld returned 1 exit status
I'm not very familiar with building applications that use the Windows API with MinGW so it's very likely that I made a silly mistake. Suggestions on how to fix this would be appreciated. Denver
"Denver Gingerich" <denver(a)ossguy.com> wrote:
gcc -lgdi32 -luser32 -o x x.o -mwindows x.o:x.c:(.text+0x5e): undefined reference to `EnumDisplaySettingsExA' collect2: ld returned 1 exit status
I'm not very familiar with building applications that use the Windows API with MinGW so it's very likely that I made a silly mistake. Suggestions on how to fix this would be appreciated.
You could try EnumDisplaySettings instead. -- Dmitry.
On Tue, Mar 4, 2008 at 7:07 PM, Dmitry Timoshkov <dmitry(a)codeweavers.com> wrote:
"Denver Gingerich" <denver(a)ossguy.com> wrote:
gcc -lgdi32 -luser32 -o x x.o -mwindows x.o:x.c:(.text+0x5e): undefined reference to `EnumDisplaySettingsExA' collect2: ld returned 1 exit status
I'm not very familiar with building applications that use the Windows API with MinGW so it's very likely that I made a silly mistake. Suggestions on how to fix this would be appreciated.
You could try EnumDisplaySettings instead.
Surprisingly (to me), that worked. Thanks for the tip. I'll report back after I've run the tests. Denver
participants (5)
-
Denver Gingerich -
Dmitry Timoshkov -
mark cox -
Matteo Italia -
Stefan Dösinger