Francois Gouget : gdi32/tests: Fix the SetDeviceGammaRamp() tests on Windows 10 1909.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9d6a9909c3fcffce928cd836ff20ad0c66f1340c
URL:    https://gitlab.winehq.org/wine/wine/-/commit/9d6a9909c3fcffce928cd836ff20ad0...

Author: Francois Gouget 
Date:   Mon Feb 27 10:47:19 2023 +0100

gdi32/tests: Fix the SetDeviceGammaRamp() tests on Windows 10 1909.

SetDeviceGammaRamp() checks the specified ramp to prevent applications
from setting malicious gamma ramps (e.g. hiding text by remapping its
color to match the background).
But Windows 10 1909 has fewer checks than later Windows 10 versions.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54593

---

dlls/gdi32/tests/dc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/dlls/gdi32/tests/dc.c b/dlls/gdi32/tests/dc.c
index 72d0f76f748..8ccadbd6ff6 100644
--- a/dlls/gdi32/tests/dc.c
+++ b/dlls/gdi32/tests/dc.c
@@ -1268,12 +1268,14 @@ static void test_gamma(void)
     /* set one color ramp to zeros */
     memset(ramp[0], 0, sizeof(ramp[0]));
     ret = SetDeviceGammaRamp(hdc, &ramp);
-    ok(!ret, "SetDeviceGammaRamp(zeroes) succeeded\n");
+    ok(!ret || broken(ret /* win1909 */),
+       "SetDeviceGammaRamp(zeroes) succeeded\n");

/* set one color ramp to a flat straight rising line */
     for (i = 0; i < 256; i++) ramp[0][i] = i;
     ret = SetDeviceGammaRamp(hdc, &ramp);
-    todo_wine ok(!ret, "SetDeviceGammaRamp(low) succeeded\n");
+    todo_wine ok(!ret || broken(ret /* win1909 */),
+       "SetDeviceGammaRamp(low) succeeded\n");

/* set one color ramp to a steep straight rising line */
     for (i = 0; i < 256; i++) ramp[0][i] = i * 256;
@@ -1285,7 +1287,8 @@ static void test_gamma(void)
     ramp[0][1] = 0x7FFF;
     for (i = 2; i < 256; i++) ramp[0][i] = 0xFFFF;
     ret = SetDeviceGammaRamp(hdc, &ramp);
-    ok(!ret, "SetDeviceGammaRam(bright) succeeded\n");
+    ok(!ret || broken(ret /* win1909 */),
+       "SetDeviceGammaRam(bright) succeeded\n");

/* try ramps which are not uniform */
     for (i = 0; i < 256; i++) ramp[0][i] = 512 * i; /* wraps midway */