[PATCH v4 4/4] winevulkan: Introduce debugging environment variables.

[Jacek Caban]

From: Jacek Caban

---
 dlls/winevulkan/vulkan.c | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/dlls/winevulkan/vulkan.c b/dlls/winevulkan/vulkan.c
index ccd2669dad1..fc56620184d 100644
--- a/dlls/winevulkan/vulkan.c
+++ b/dlls/winevulkan/vulkan.c
@@ -38,7 +38,32 @@ static BOOL is_wow64(void)

static BOOL use_external_memory(void)
 {
-    return is_wow64();
+    static int ret = -1;
+
+    if (ret == -1)
+    {
+        const char *env;
+        if ((env = getenv("WINEVULKAN_EXTERNAL_MEMORY")))
+            ret = *env && *env != '0';
+        else ret = is_wow64();
+    }
+
+    return ret;
+}
+
+static BOOL use_direct_unix_calls(void)
+{
+    static int ret = -1;
+
+    if (ret == -1)
+    {
+        const char *env;
+        if ((env = getenv("WINEVULKAN_DIRECT_UNIX_CALLS")))
+            ret = *env && *env != '0';
+        else ret = !is_wow64();
+    }
+
+    return ret;
 }

static ULONG_PTR zero_bits(void)
@@ -470,7 +495,8 @@ NTSTATUS init_vulkan(void *args)
     }

-    *(void **)args = vk_direct_unix_call;
+    if (use_direct_unix_calls())
+        *(void **)args = vk_direct_unix_call;
     return STATUS_SUCCESS;
 }

@@ -486,7 +512,8 @@ NTSTATUS init_vulkan32(void *args)
     }

#ifndef _WIN64
-    *(void **)args = vk_direct_unix_call;
+    if (use_direct_unix_calls())
+        *(void **)args = vk_direct_unix_call;
 #endif
     return STATUS_SUCCESS;
 }