fix: trigger change on solid color change (#11399) b5a73917b1

Co-authored-by: hernan <hernan@rive.app>

.rive_head

@@ -1 +1 @@
-0488666fb001738ea7ceeca04038932feed69973
+b5a73917b1822c022c03e17aac08d482cdeaa23d

include/rive/artboard.hpp

@@ -241,6 +241,7 @@ public:
     void addToRenderPath(RenderPath* path, const Mat2D& transform);
     void addToRawPath(RawPath& path, const Mat2D* transform);
 
+    void changed();
 #ifdef TESTING
     ShapePaintPath* clipPath() { return &m_worldPath; }
     ShapePaintPath* backgroundPath() { return &m_localPath; }

src/artboard.cpp

@@ -1913,6 +1913,18 @@ bool Artboard::isAncestor(const Artboard* artboard)
     return false;
 }
 
+void Artboard::changed()
+{
+    if (!m_didChange)
+    {
+        m_didChange = true;
+        if (parentArtboard())
+        {
+            parentArtboard()->changed();
+        }
+    }
+}
+
 ////////// ArtboardInstance
 
 #include "rive/animation/linear_animation_instance.hpp"

src/shapes/paint/solid_color.cpp

@@ -2,6 +2,7 @@
 #include "rive/container_component.hpp"
 #include "rive/renderer.hpp"
 #include "rive/shapes/paint/color.hpp"
+#include "rive/artboard.hpp"
 
 using namespace rive;
 
@@ -38,6 +39,10 @@ void SolidColor::renderOpacityChanged()
     {
         m_flags |= ShapePaintMutator::Flags::translucent;
     }
+    if (artboard())
+    {
+        artboard()->changed();
+    }
 }
 
 void SolidColor::applyTo(RenderPaint* renderPaint, float opacityModifier)

tests/unit_tests/runtime/render_test.cpp

@@ -0,0 +1,37 @@
+#include "rive/file.hpp"
+#include "rive/animation/state_machine_instance.hpp"
+#include "rive/viewmodel/viewmodel.hpp"
+#include "utils/serializing_factory.hpp"
+#include "rive_file_reader.hpp"
+#include "utils/no_op_renderer.hpp"
+#include <catch.hpp>
+#include <cstdio>
+#include <cstring>
+
+using namespace rive;
+
+TEST_CASE("file with only solid color animating triggers change on artboard",
+          "[silver]")
+{
+    auto file = ReadRiveFile("assets/solid_affects_has_changed.riv");
+
+    auto artboard = file->artboardDefault();
+    NoOpRenderer renderer;
+
+    REQUIRE(artboard != nullptr);
+    auto stateMachine = artboard->stateMachineAt(0);
+
+    auto vmi = file->createViewModelInstance(artboard.get());
+
+    stateMachine->bindViewModelInstance(vmi);
+    stateMachine->advanceAndApply(0.1f);
+    artboard->draw(&renderer);
+
+    int frames = 10;
+    for (int i = 0; i < frames; i++)
+    {
+        stateMachine->advanceAndApply(0.1f);
+        REQUIRE(artboard->didChange() == true);
+        artboard->draw(&renderer);
+    }
+}