[Bug 45698] Gdiplus::GraphicsPath::AddString does trim multi line string

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=45698

David Kahurani  changed:

What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #2 from David Kahurani  ---
I think I can reproduce this issue, though, not precisely like the OP
described.

Outlines of the strings added to a path like the OP described are almost always
not drawn correctly. They are, however, rarely drawn correctly.

With the code(please excuse my window management hacking)

#include <windows.h>
#include <gdiplus.h>
#include <cstdio>

using namespace Gdiplus;

int main(int argc, char *argv[])
{
    HWND hwnd;
    struct GdiplusStartupInput gdiplusStartupInput;
    ULONG_PTR gdiplusToken;

WNDCLASSA properties;
    memset(&properties, 0, sizeof(properties));
    properties.lpszClassName = "AddString";
    properties.lpfnWndProc = DefWindowProcA;
    properties.hInstance = GetModuleHandleA(0);
    properties.hbrBackground = (HBRUSH)CreateSolidBrush(RGB(0, 0, 0));
    RegisterClassA( &properties );

hwnd = CreateWindowA( "AddString", "AddString test", WS_OVERLAPPEDWINDOW |
WS_VISIBLE,
                          CW_USEDEFAULT, CW_USEDEFAULT, 800, 600, 0, 0,
GetModuleHandleA(0), 0 );

gdiplusStartupInput.GdiplusVersion              = 1;
    gdiplusStartupInput.DebugEventCallback          = NULL;
    gdiplusStartupInput.SuppressBackgroundThread    = 0;
    gdiplusStartupInput.SuppressExternalCodecs      = 0;

GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

HDC hdc = GetDC(hwnd);

Graphics graphics(hdc);
    FontFamily fontFamily(L"Times New Roman");

GraphicsPath pathstring, pathrect;
    StringFormat format = {};

Status status = pathstring.AddString(L"Hello World",
                   -1,
                   &fontFamily,
                   0,
                   48,
                   PointF(100.0f, 100.0f),
                   &format);

Pen pen(Color(255, 255, 255, 0));
    graphics.DrawPath(&pen, &pathstring);

Sleep(100000);

return 0;
}

I get the attached screenshot, sometimes just the letters 'Hel', sometimes,
'Hello' etc. I just fails randomly(though the return code is always success).

I tried tracking down the issue and noticed this happens when the method static
BOOL polyline( HDC hdc, const POINT *points, ULONG count ), is called
repeatedly. At some point in the later runs, it breaks, though, I haven't
witnessed it break in the first runs. And, for instance, if you have only one
character in the added strings, it's outline is always rendered correctly.