commit a800ec96f724121e689b54589e4d73b5f2a93414
author Stephen White <senorblanco@chromium.org> Fri Aug 02 15:04:52 2019 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Fri Aug 02 19:51:02 2019 +0000
tree 938f39d1ebfd40e6f51d60a385041be5d233e993
parent f8e5aadbd424347575948e83a04249799e915b5b

Dawn: implement sk_app window contexts for all backends.

Implement Window contexts for D3D12, Metal and Vulkan, as well as
a base class for all of them (DawnWindowContext).
Implement WSI, swap chains and external textures for all backends.
Add Dawn support to Viewer app.

Change-Id: I9368eae8d43594821aa1edd9fd559c8a9ba30066
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228060
Commit-Queue: Stephen White <senorblanco@chromium.org>
Reviewed-by: Jim Van Verth <jvanverth@google.com>

tools/viewer/Viewer.cpp

diff --git a/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index ef26b8d..1189703 100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -81,10 +81,12 @@
 static DEFINE_string(slide, "", "Start on this sample.");
 static DEFINE_bool(list, false, "List samples?");
 
-#ifdef SK_VULKAN
+#if defined(SK_VULKAN)
 #    define BACKENDS_STR "\"sw\", \"gl\", and \"vk\""
 #elif defined(SK_METAL) && defined(SK_BUILD_FOR_MAC)
 #    define BACKENDS_STR "\"sw\", \"gl\", and \"mtl\""
+#elif defined(SK_DAWN)
+#    define BACKENDS_STR "\"sw\", \"gl\", and \"dawn\""
 #else
 #    define BACKENDS_STR "\"sw\" and \"gl\""
 #endif
@@ -133,6 +135,9 @@
 #if SK_ANGLE && defined(SK_BUILD_FOR_WIN)
     "ANGLE",
 #endif
+#ifdef SK_DAWN
+    "Dawn",
+#endif
 #ifdef SK_VULKAN
     "Vulkan",
 #endif
@@ -143,6 +148,11 @@
 };
 
 static sk_app::Window::BackendType get_backend_type(const char* str) {
+#ifdef SK_DAWN
+    if (0 == strcmp(str, "dawn")) {
+        return sk_app::Window::kDawn_BackendType;
+    } else
+#endif
 #ifdef SK_VULKAN
     if (0 == strcmp(str, "vk")) {
         return sk_app::Window::kVulkan_BackendType;
@@ -1520,6 +1530,10 @@
                 ImGui::SameLine();
                 ImGui::RadioButton("ANGLE", &newBackend, sk_app::Window::kANGLE_BackendType);
 #endif
+#if defined(SK_DAWN)
+                ImGui::SameLine();
+                ImGui::RadioButton("Dawn", &newBackend, sk_app::Window::kDawn_BackendType);
+#endif
 #if defined(SK_VULKAN)
                 ImGui::SameLine();
                 ImGui::RadioButton("Vulkan", &newBackend, sk_app::Window::kVulkan_BackendType);