[Impeller] Turn on golden tests that use the ImGui widgets functions (#50606)

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

Author: gaaclarke

impeller/golden_tests/golden_playground_test_mac.cc

@@ -63,13 +63,6 @@ const std::unique_ptr<PlaygroundImpl>& GetSharedVulkanPlayground(
 // If you add a new playground test to the aiks unittests and you do not want it
 // to also be a golden test, then add the test name here.
 static const std::vector<std::string> kSkipTests = {
-    IMP_AIKSTEST(GaussianBlurAnimatedBackdrop),
-    IMP_AIKSTEST(CanRenderBackdropBlurInteractive),
-    IMP_AIKSTEST(ClippedBlurFilterRendersCorrectlyInteractive),
-    IMP_AIKSTEST(GradientStrokesRenderCorrectly),
-    IMP_AIKSTEST(SolidStrokesRenderCorrectly),
-    IMP_AIKSTEST(GaussianBlurRotatedAndClippedInteractive),
-    IMP_AIKSTEST(CoverageOriginShouldBeAccountedForInSubpasses),
     // TextRotated is flakey and we can't seem to get it to stabilize on Skia
     // Gold.
     IMP_AIKSTEST(TextRotated),

impeller/playground/widgets.cc

@@ -7,39 +7,43 @@
 namespace impeller {
 
 Point DrawPlaygroundPoint(PlaygroundPoint& point) {
-  impeller::Point mouse_pos(ImGui::GetMousePos().x, ImGui::GetMousePos().y);
-  if (!point.prev_mouse_pos.has_value()) {
-    point.prev_mouse_pos = mouse_pos;
-  }
+  if (ImGui::GetCurrentContext()) {
+    impeller::Point mouse_pos(ImGui::GetMousePos().x, ImGui::GetMousePos().y);
+    if (!point.prev_mouse_pos.has_value()) {
+      point.prev_mouse_pos = mouse_pos;
+    }
 
-  if (ImGui::IsKeyPressed(ImGuiKey_R)) {
-    point.position = point.reset_position;
-    point.dragging = false;
-  }
+    if (ImGui::IsKeyPressed(ImGuiKey_R)) {
+      point.position = point.reset_position;
+      point.dragging = false;
+    }
 
-  bool hovering =
-      point.position.GetDistance(mouse_pos) < point.radius &&
-      point.position.GetDistance(point.prev_mouse_pos.value()) < point.radius;
-  if (!ImGui::IsMouseDown(0)) {
-    point.dragging = false;
-  } else if (hovering && ImGui::IsMouseClicked(0)) {
-    point.dragging = true;
-  }
-  if (point.dragging) {
-    point.position += mouse_pos - point.prev_mouse_pos.value();
-  }
-  ImGui::GetBackgroundDrawList()->AddCircleFilled(
-      {point.position.x, point.position.y}, point.radius,
-      ImColor(point.color.red, point.color.green, point.color.blue,
-              (hovering || point.dragging) ? 0.6f : 0.3f));
-  if (hovering || point.dragging) {
-    ImGui::GetBackgroundDrawList()->AddText(
-        {point.position.x - point.radius, point.position.y + point.radius + 10},
-        ImColor(point.color.red, point.color.green, point.color.blue, 1.0f),
-        impeller::SPrintF("x:%0.3f y:%0.3f", point.position.x, point.position.y)
-            .c_str());
+    bool hovering =
+        point.position.GetDistance(mouse_pos) < point.radius &&
+        point.position.GetDistance(point.prev_mouse_pos.value()) < point.radius;
+    if (!ImGui::IsMouseDown(0)) {
+      point.dragging = false;
+    } else if (hovering && ImGui::IsMouseClicked(0)) {
+      point.dragging = true;
+    }
+    if (point.dragging) {
+      point.position += mouse_pos - point.prev_mouse_pos.value();
+    }
+    ImGui::GetBackgroundDrawList()->AddCircleFilled(
+        {point.position.x, point.position.y}, point.radius,
+        ImColor(point.color.red, point.color.green, point.color.blue,
+                (hovering || point.dragging) ? 0.6f : 0.3f));
+    if (hovering || point.dragging) {
+      ImGui::GetBackgroundDrawList()->AddText(
+          {point.position.x - point.radius,
+           point.position.y + point.radius + 10},
+          ImColor(point.color.red, point.color.green, point.color.blue, 1.0f),
+          impeller::SPrintF("x:%0.3f y:%0.3f", point.position.x,
+                            point.position.y)
+              .c_str());
+    }
+    point.prev_mouse_pos = mouse_pos;
   }
-  point.prev_mouse_pos = mouse_pos;
   return point.position;
 }
 
@@ -48,14 +52,15 @@ std::tuple<Point, Point> DrawPlaygroundLine(PlaygroundPoint& point_a,
   Point position_a = DrawPlaygroundPoint(point_a);
   Point position_b = DrawPlaygroundPoint(point_b);
 
-  auto dir = (position_b - position_a).Normalize() * point_a.radius;
-  auto line_a = position_a + dir;
-  auto line_b = position_b - dir;
-  ImGui::GetBackgroundDrawList()->AddLine(
-      {line_a.x, line_a.y}, {line_b.x, line_b.y},
-      ImColor(point_b.color.red, point_b.color.green, point_b.color.blue,
-              0.3f));
-
+  if (ImGui::GetCurrentContext()) {
+    auto dir = (position_b - position_a).Normalize() * point_a.radius;
+    auto line_a = position_a + dir;
+    auto line_b = position_b - dir;
+    ImGui::GetBackgroundDrawList()->AddLine(
+        {line_a.x, line_a.y}, {line_b.x, line_b.y},
+        ImColor(point_b.color.red, point_b.color.green, point_b.color.blue,
+                0.3f));
+  }
   return std::make_tuple(position_a, position_b);
 }
 //

testing/run_tests.py

@@ -40,7 +40,7 @@
 ENCODING = 'UTF-8'
 
 # This number must be updated when adding new golden tests to impeller.
-_NUM_EXPECTED_GENERATED_IMPELLER_GOLDEN_FILES = 578
+_NUM_EXPECTED_GENERATED_IMPELLER_GOLDEN_FILES = 599
 
 logger = logging.getLogger(__name__)
 logger_handler = logging.StreamHandler()