[PATCH 1/1] winex11.drv: Map driver DC coordinates to raw monitor DPI.

[Zhiyi Zhang]

From: Zhiyi Zhang

This is similar to 1529ab0ac7a3591cad301d7b3cbb0a7d85377f3e.

DOOM (379720) doesn't change back to the original resolution when entering windowed mode from
non-native fullscreen mode on the secondary monitor. So after that, the raw and effective monitor
DPI differs when emulate_modeset is on, and Wine needs to scale the game window according to DPI.
Wine's built-in title bar is drawn using NtGdiGradientFill() in draw_caption_bar(). On Linux,
NtGdiGradientFill() eventually calls xrenderdrv_GradientFill(). However, the lp_to_dp() in
winex11.drv doesn't map coordinates to raw monitor DPI. So the title bar drawn in this case is too
small and looks corrupted.
---
 dlls/win32u/mapping.c     | 16 ++++++++++++++++
 dlls/winex11.drv/x11drv.h |  2 +-
 include/ntgdi.h           |  2 ++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/mapping.c b/dlls/win32u/mapping.c
index 65f276e853f..ec0e7e4415d 100644
--- a/dlls/win32u/mapping.c
+++ b/dlls/win32u/mapping.c
@@ -247,6 +247,22 @@ BOOL WINAPI NtGdiTransformPoints( HDC hdc, const POINT *points_in, POINT *points
         ret = TRUE;
         break;

+    case NtGdiLPtoDPRaw:
+        for (i = 0; i < count; i++)
+        {
+            double x = points_in[i].x;
+            double y = points_in[i].y;
+            points_out[i].x = GDI_ROUND( x * dc->xformWorld2Vport.eM11 +
+                                         y * dc->xformWorld2Vport.eM21 +
+                                         dc->xformWorld2Vport.eDx );
+            points_out[i].y = GDI_ROUND( x * dc->xformWorld2Vport.eM12 +
+                                         y * dc->xformWorld2Vport.eM22 +
+                                         dc->xformWorld2Vport.eDy );
+            points_out[i] = map_dpi_point( points_out[i], dc->dpi_from, dc->dpi_to );
+        }
+        ret = TRUE;
+        break;
+
     default:
         WARN( "invalid mode %x\n", mode );
         break;
diff --git a/dlls/winex11.drv/x11drv.h b/dlls/winex11.drv/x11drv.h
index eed34cf1cae..60cbf838ba3 100644
--- a/dlls/winex11.drv/x11drv.h
+++ b/dlls/winex11.drv/x11drv.h
@@ -893,7 +893,7 @@ extern NTSTATUS x11drv_tablet_info( void *arg );

static inline BOOL lp_to_dp( HDC hdc, POINT *points, INT count )
 {
-    return NtGdiTransformPoints( hdc, points, points, count, NtGdiLPtoDP );
+    return NtGdiTransformPoints( hdc, points, points, count, NtGdiLPtoDPRaw );
 }

static inline UINT get_palette_entries( HPALETTE palette, UINT start, UINT count, PALETTEENTRY *entries )
diff --git a/include/ntgdi.h b/include/ntgdi.h
index c5032cc6970..abc5d44faae 100644
--- a/include/ntgdi.h
+++ b/include/ntgdi.h
@@ -110,6 +110,8 @@ enum
 {
     NtGdiLPtoDP,
     NtGdiDPtoLP,
+    /* not compatible with Windows */
+    NtGdiLPtoDPRaw,
 };

enum