[reactos] 10/18: [WIN32SS] Add PDEVOBJ_vEnableDisplay and PDEVOBJ_bDisplayDisplay

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=c5fb89dced1da2ed4d6be…

commit c5fb89dced1da2ed4d6bedd478e417ef385cd71b
Author:     Hervé Poussineau <hpoussin(a)reactos.org>
AuthorDate: Sun Jan 9 11:33:38 2022 +0100
Commit:     hpoussin <32227662+hpoussin(a)users.noreply.github.com>
CommitDate: Fri Apr 15 23:09:16 2022 +0200

    [WIN32SS] Add PDEVOBJ_vEnableDisplay and PDEVOBJ_bDisplayDisplay
    
    Use them where appropriate.
---
 win32ss/gdi/eng/pdevobj.c | 48 +++++++++++++++++++++++++++++++++++++++++------
 win32ss/gdi/eng/pdevobj.h |  8 ++++++++
 2 files changed, 50 insertions(+), 6 deletions(-)

diff --git a/win32ss/gdi/eng/pdevobj.c b/win32ss/gdi/eng/pdevobj.c
index 1bf060dbec2..f6b58b1dd8d 100644
--- a/win32ss/gdi/eng/pdevobj.c
+++ b/win32ss/gdi/eng/pdevobj.c
@@ -276,6 +276,45 @@ PDEVOBJ_pSurface(
     return ppdev->pSurface;
 }
 
+VOID
+PDEVOBJ_vEnableDisplay(
+    _Inout_ PPDEVOBJ ppdev)
+{
+    BOOL assertVal;
+
+    if (!(ppdev->flFlags & PDEV_DISABLED))
+        return;
+
+    /* Try to enable display until success */
+    do
+    {
+        TRACE("DrvAssertMode(dhpdev %p, TRUE)\n", ppdev->dhpdev);
+        assertVal = ppdev->pfn.AssertMode(ppdev->dhpdev, TRUE);
+        TRACE("DrvAssertMode(dhpdev %p, TRUE) => %d\n", ppdev->dhpdev,
assertVal);
+    } while (!assertVal);
+
+    ppdev->flFlags &= ~PDEV_DISABLED;
+}
+
+BOOL
+PDEVOBJ_bDisableDisplay(
+    _Inout_ PPDEVOBJ ppdev)
+{
+    BOOL assertVal;
+
+    if (ppdev->flFlags & PDEV_DISABLED)
+        return TRUE;
+
+    TRACE("DrvAssertMode(dhpdev %p, FALSE)\n", ppdev->dhpdev);
+    assertVal = ppdev->pfn.AssertMode(ppdev->dhpdev, FALSE);
+    TRACE("DrvAssertMode(dhpdev %p, FALSE) => %d\n", ppdev->dhpdev,
assertVal);
+
+    if (assertVal)
+        ppdev->flFlags |= PDEV_DISABLED;
+
+    return assertVal;
+}
+
 VOID
 NTAPI
 PDEVOBJ_vRefreshModeList(
@@ -509,9 +548,9 @@ PDEVOBJ_bSwitchMode(
     // pdm = LDEVOBJ_bProbeAndCaptureDevmode(ppdev, pdm);
 
     /* 1. Temporarily disable the current PDEV and reset video to its default mode */
-    if (!ppdev->pfn.AssertMode(ppdev->dhpdev, FALSE))
+    if (!PDEVOBJ_bDisableDisplay(ppdev))
     {
-        DPRINT1("DrvAssertMode(FALSE) failed\n");
+        DPRINT1("PDEVOBJ_bDisableDisplay() failed\n");
         goto leave;
     }
 
@@ -560,10 +599,7 @@ PDEVOBJ_bSwitchMode(
 
 leave2:
     /* Set the new video mode, or restore the original one in case of failure */
-    if (!ppdev->pfn.AssertMode(ppdev->dhpdev, TRUE))
-    {
-        DPRINT1("DrvAssertMode(TRUE) failed\n");
-    }
+    PDEVOBJ_vEnableDisplay(ppdev);
 
 leave:
     /* Unlock everything else */
diff --git a/win32ss/gdi/eng/pdevobj.h b/win32ss/gdi/eng/pdevobj.h
index 4943c994d29..c9fdd3252c1 100644
--- a/win32ss/gdi/eng/pdevobj.h
+++ b/win32ss/gdi/eng/pdevobj.h
@@ -219,4 +219,12 @@ PDEVOBJ_bDynamicModeChange(
     _Inout_ PPDEVOBJ ppdev,
     _Inout_ PPDEVOBJ ppdev2);
 
+VOID
+PDEVOBJ_vEnableDisplay(
+    _Inout_ PPDEVOBJ ppdev);
+
+BOOL
+PDEVOBJ_bDisableDisplay(
+    _Inout_ PPDEVOBJ ppdev);
+
 #endif /* !__WIN32K_PDEVOBJ_H */