[reactos] 01/01: [GDI32] Preserve PitchAndFamily across GetTextMetricsW call (#2689)

[Doug Lyons]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=448bcede24b2f8384c3565...

commit 448bcede24b2f8384c35656019622eb0ff5379d2
Author:     Doug Lyons [e-mail]
AuthorDate: Tue Sep 1 06:08:26 2020 -0500
Commit:     GitHub [e-mail]
CommitDate: Tue Sep 1 20:08:26 2020 +0900

[GDI32] Preserve PitchAndFamily across GetTextMetricsW call (#2689)

ReactOS has no Raster fonts today, so compensate for this affecting the editbox margins.
    CORE-1091
    This patch fixes the inability to see all of the characters in the CD-KEY box of Starcraft and Visual Basic 5 and Visual Basic 6 Installs. It supersedes #2656
---
 win32ss/gdi/ntgdi/text.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/win32ss/gdi/ntgdi/text.c b/win32ss/gdi/ntgdi/text.c
index 2ea694103ae..3761dd8f3e0 100644
--- a/win32ss/gdi/ntgdi/text.c
+++ b/win32ss/gdi/ntgdi/text.c
@@ -13,6 +13,48 @@
 #define NDEBUG
 #include <debug.h>

+
+/*
+   This is a hack. See CORE-1091.
+
+   It is needed because ReactOS does not support raster fonts now.
+   After Raster Font support is added, then it can be removed.
+   Find the current font's logfont for testing its lf.lfFaceName.
+
+   The ftGdiGetTextMetricsW function currently in ReactOS will always return a Truetype font
+   because we cannot yet handle raster fonts. So it will return flags
+   TMPF_VECTOR and TMPF_TRUETYPE, which can cause problems in edit boxes.
+ */
+
+VOID FASTCALL
+IntTMWFixUp(
+   HDC hDC,
+   TMW_INTERNAL *ptm)
+{
+    LOGFONTW lf;
+    HFONT hCurrentFont;
+
+    hCurrentFont = NtGdiGetDCObject(hDC, GDI_OBJECT_TYPE_FONT);
+    GreGetObject(hCurrentFont, sizeof(LOGFONTW), &lf);
+
+    /* To compensate for the GetTextMetricsW call changing the PitchAndFamily
+     * to a TrueType one when we have a 'Raster' font as our input we filter
+     * out the problematic TrueType and Vector bits.
+     * Our list below checks for Raster Font Facenames. */
+    DPRINT1("Font Facename is '%S'.\n", lf.lfFaceName);
+    if ((wcsicmp(lf.lfFaceName, L"Helv") == 0) ||
+        (wcsicmp(lf.lfFaceName, L"Courier") == 0) ||
+        (wcsicmp(lf.lfFaceName, L"MS Sans Serif") == 0) ||
+        (wcsicmp(lf.lfFaceName, L"MS Serif") == 0) ||
+        (wcsicmp(lf.lfFaceName, L"Times New Roman") == 0) ||
+        (wcsicmp(lf.lfFaceName, L"MS Shell Dlg") == 0) ||
+        (wcsicmp(lf.lfFaceName, L"System") == 0) ||
+        (wcsicmp(lf.lfFaceName, L"Terminal") == 0))
+    {
+        ptm->TextMetric.tmPitchAndFamily &= ~(TMPF_TRUETYPE | TMPF_VECTOR);
+    }
+}
+
 /** Functions *****************************************************************/

BOOL FASTCALL
@@ -154,6 +196,7 @@ GreGetTextMetricsW(
 {
    TMW_INTERNAL tmwi;
    if (!ftGdiGetTextMetricsW(hdc, &tmwi)) return FALSE;
+   IntTMWFixUp(hdc, &tmwi);
    *lptm = tmwi.TextMetric;
    return TRUE;
 }
@@ -555,6 +598,7 @@ NtGdiGetTextMetricsW(
     {
         if (ftGdiGetTextMetricsW(hDC, &Tmwi))
         {
+            IntTMWFixUp(hDC, &Tmwi);
             _SEH2_TRY
             {
                 ProbeForWrite(pUnsafeTmwi, cj, 1);