On 3/19/24 18:15, James Richters via fpc-pascal wrote:
I am trying to compile a program that uses PTCGraph for Windows 64
bit, and it’s not behaving the same as it does on Win32.
When I compile it for Win32, it is correctly detecting my monitor
resolutionI have a vertical monitor with a resolution of 1080x2560
When I run the Win32 program I correctly get:
Max resolution:1080x2560
The 64bit version incorrectly produces:
Max resolution:2160x3840
I tried it on another computer with a 1280x1024 monitor and it
correctly identifies it on both versions.
Below is the procedure that gets the monitor resolution.
I am using the current trunk of FPC installed today.
Does anyone have any idea why the 64bit version would work differently
than the 32bit version?
James
No idea, but it does sound like a Windows issue to me. Or a video card
driver issue? The API is the same. The mechanism for obtaining the list
of resolutions is also the same. Perhaps Microsoft uses a fake
DirectDraw shim in 64-bit Windows that presents a fake resolutions list,
because they can? Perhaps it is an issue, related to the video card
drivers? What are the video cards on the two machines that you have tested?
Nikolay
Uses
Windows,ptcgraph,ptccrt,crt,sysutils;
Procedure WindowsGRAPHINIT;
Var
gd,gm:smallint;
m: PModeInfo;
graphinitialize,MaxX,MaxY:Integer;
Begin
Windowtitle:='ptcgraph';
graphinitialize:=1234;
MaxX:=0;
MaxY:=0;
m := QueryAdapterInfo;
while m <> nil do
begin
If m^.MaxX+1>MaxX then
MaxX:=m^.MaxX+1;
If m^.MaxY+1>MaxY then
MaxY:=m^.MaxY+1;
m := m^.next;
end;
Writeln ('Max resolution:',MaxX,'x',MaxY);
gd:=VESA;
gm:=InstallUserMode(WindowXResolution,WindowYResolution,65536,1,10000,10000);
If gm<0 Then
Begin
Writeln('Error Installing Graphics ',gm,' ',grapherrormsg(gm));
Halt(70);
End;
PtcGraph.InitGraph(gd,gm,'');
… snip …
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