Dynamically load the vulkan library in our test tools

Bug: skia:
Change-Id: I7c1f6cbb2b50ca284f40cf4b9ef49a76083b38c6
Reviewed-on: https://skia-review.googlesource.com/68643
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>

3 files changed, 68 insertions, 3 deletions

diff --git a/tools/gpu/vk/VkTestContext.cpp b/tools/gpu/vk/VkTestContext.cpp
index e329583a03..daaa55bfa0 100644
--- a/tools/gpu/vk/VkTestContext.cpp
+++ b/tools/gpu/vk/VkTestContext.cpp
@@ -10,9 +10,9 @@
 #ifdef SK_VULKAN
 
 #include "GrContext.h"
+#include "VkTestUtils.h"
 #include "vk/GrVkInterface.h"
 #include "vk/GrVkUtil.h"
-#include <vulkan/vulkan.h>
 
 namespace {
 /**
@@ -114,8 +114,12 @@ public:
         if (sharedContext) {
             backendContext = sharedContext->getVkBackendContext();
         } else {
-            backendContext.reset(GrVkBackendContext::Create(vkGetInstanceProcAddr,
-                                                            vkGetDeviceProcAddr));
+            PFN_vkGetInstanceProcAddr instProc;
+            PFN_vkGetDeviceProcAddr devProc;
+            if (!sk_gpu_test::LoadVkLibraryAndGetProcAddrFuncs(&instProc, &devProc)) {
+                return nullptr;
+            }
+            backendContext.reset(GrVkBackendContext::Create(instProc, devProc));
         }
         if (!backendContext) {
             return nullptr;
diff --git a/tools/gpu/vk/VkTestUtils.cpp b/tools/gpu/vk/VkTestUtils.cpp
new file mode 100644
index 0000000000..62fd312ecf
--- /dev/null
+++ b/tools/gpu/vk/VkTestUtils.cpp
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "VkTestUtils.h"
+
+#include "../ports/SkOSLibrary.h"
+
+namespace sk_gpu_test {
+
+bool LoadVkLibraryAndGetProcAddrFuncs(PFN_vkGetInstanceProcAddr* instProc,
+                                                   PFN_vkGetDeviceProcAddr* devProc) {
+    static void* vkLib = nullptr;
+    static PFN_vkGetInstanceProcAddr localInstProc = nullptr;
+    static PFN_vkGetDeviceProcAddr localDevProc = nullptr;
+    if (!vkLib) {
+#if defined _WIN32
+        vkLib = DynamicLoadLibrary("vulkan-1.dll");
+#else
+        vkLib = DynamicLoadLibrary("libvulkan.so");
+#endif
+        if (!vkLib) {
+            return false;
+        }
+        localInstProc = (PFN_vkGetInstanceProcAddr) GetProcedureAddress(vkLib,
+                                                                        "vkGetInstanceProcAddr");
+        localDevProc = (PFN_vkGetDeviceProcAddr) GetProcedureAddress(vkLib,
+                                                                     "vkGetDeviceProcAddr");
+    }
+    if (!localInstProc || !localDevProc) {
+        return false;
+    }
+    *instProc = localInstProc;
+    *devProc = localDevProc;
+    return true;
+}
+}
diff --git a/tools/gpu/vk/VkTestUtils.h b/tools/gpu/vk/VkTestUtils.h
new file mode 100644
index 0000000000..43e9dfdbdc
--- /dev/null
+++ b/tools/gpu/vk/VkTestUtils.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef VkTestUtils_DEFINED
+#define VkTestUtils_DEFINED
+
+#ifdef SK_VULKAN
+
+#include "vk/GrVkDefines.h"
+
+namespace sk_gpu_test {
+    bool LoadVkLibraryAndGetProcAddrFuncs(PFN_vkGetInstanceProcAddr*, PFN_vkGetDeviceProcAddr*);
+}
+
+#endif
+#endif
+