diff --git a/libs/hwui/effects/GainmapRenderer.cpp b/libs/hwui/effects/GainmapRenderer.cpp
index bfe4eaf..613f52b 100644
--- a/libs/hwui/effects/GainmapRenderer.cpp
+++ b/libs/hwui/effects/GainmapRenderer.cpp
@@ -38,7 +38,7 @@
 
 using namespace renderthread;
 
-static float getTargetHdrSdrRatio(const SkColorSpace* destColorspace) {
+float getTargetHdrSdrRatio(const SkColorSpace* destColorspace) {
     // We should always have a known destination colorspace. If we don't we must be in some
     // legacy mode where we're lost and also definitely not going to HDR
     if (destColorspace == nullptr) {
diff --git a/libs/hwui/effects/GainmapRenderer.h b/libs/hwui/effects/GainmapRenderer.h
index 4ed2445..0ab03f0 100644
--- a/libs/hwui/effects/GainmapRenderer.h
+++ b/libs/hwui/effects/GainmapRenderer.h
@@ -25,6 +25,8 @@
 
 namespace android::uirenderer {
 
+float getTargetHdrSdrRatio(const SkColorSpace* destColorspace);
+
 void DrawGainmapBitmap(SkCanvas* c, const sk_sp<const SkImage>& image, const SkRect& src,
                        const SkRect& dst, const SkSamplingOptions& sampling, const SkPaint* paint,
                        SkCanvas::SrcRectConstraint constraint,
diff --git a/libs/hwui/pipeline/skia/GLFunctorDrawable.cpp b/libs/hwui/pipeline/skia/GLFunctorDrawable.cpp
index a4960ea..c58ba68 100644
--- a/libs/hwui/pipeline/skia/GLFunctorDrawable.cpp
+++ b/libs/hwui/pipeline/skia/GLFunctorDrawable.cpp
@@ -26,6 +26,7 @@
 #include "SkM44.h"
 #include "include/gpu/GpuTypes.h" // from Skia
 #include "utils/GLUtils.h"
+#include <effects/GainmapRenderer.h>
 
 namespace android {
 namespace uirenderer {
@@ -129,6 +130,7 @@
     info.height = fboSize.height();
     mat4.getColMajor(&info.transform[0]);
     info.color_space_ptr = canvas->imageInfo().colorSpace();
+    info.currentHdrSdrRatio = getTargetHdrSdrRatio(info.color_space_ptr);
 
     // ensure that the framebuffer that the webview will render into is bound before we clear
     // the stencil and/or draw the functor.
diff --git a/libs/hwui/pipeline/skia/VkFunctorDrawable.cpp b/libs/hwui/pipeline/skia/VkFunctorDrawable.cpp
index e6ef95b..e299d12 100644
--- a/libs/hwui/pipeline/skia/VkFunctorDrawable.cpp
+++ b/libs/hwui/pipeline/skia/VkFunctorDrawable.cpp
@@ -30,6 +30,7 @@
 #include "renderthread/VulkanManager.h"
 #include "thread/ThreadBase.h"
 #include "utils/TimeUtils.h"
+#include "effects/GainmapRenderer.h"
 
 namespace android {
 namespace uirenderer {
@@ -73,6 +74,7 @@
             .clip_right = mClip.fRight,
             .clip_bottom = mClip.fBottom,
             .is_layer = !vulkan_info.fFromSwapchainOrAndroidWindow,
+            .currentHdrSdrRatio = getTargetHdrSdrRatio(mImageInfo.colorSpace()),
     };
     mat4.getColMajor(&params.transform[0]);
     params.secondary_command_buffer = vulkan_info.fSecondaryCommandBuffer;
diff --git a/libs/hwui/pipeline/skia/VkInteropFunctorDrawable.cpp b/libs/hwui/pipeline/skia/VkInteropFunctorDrawable.cpp
index e168a7b..adf3c06 100644
--- a/libs/hwui/pipeline/skia/VkInteropFunctorDrawable.cpp
+++ b/libs/hwui/pipeline/skia/VkInteropFunctorDrawable.cpp
@@ -32,6 +32,7 @@
 #include "renderthread/EglManager.h"
 #include "thread/ThreadBase.h"
 #include "utils/TimeUtils.h"
+#include "effects/GainmapRenderer.h"
 
 #include <SkBlendMode.h>
 
@@ -139,6 +140,7 @@
         info.height = mFBInfo.height();
         mat4.getColMajor(&info.transform[0]);
         info.color_space_ptr = canvas->imageInfo().colorSpace();
+        info.currentHdrSdrRatio = getTargetHdrSdrRatio(info.color_space_ptr);
 
         glViewport(0, 0, info.width, info.height);
 
diff --git a/libs/hwui/private/hwui/DrawGlInfo.h b/libs/hwui/private/hwui/DrawGlInfo.h
index 501b8df..7888c87 100644
--- a/libs/hwui/private/hwui/DrawGlInfo.h
+++ b/libs/hwui/private/hwui/DrawGlInfo.h
@@ -86,6 +86,11 @@
         // commands are issued.
         kStatusDrew = 0x4
     };
+
+    // The current HDR/SDR ratio that we are rendering to. The transform to SDR will already
+    // be baked into the color_space_ptr, so this is just to indicate the amount of extended
+    // range is available if desired
+    float currentHdrSdrRatio;
 };  // struct DrawGlInfo
 
 }  // namespace uirenderer
diff --git a/libs/hwui/private/hwui/DrawVkInfo.h b/libs/hwui/private/hwui/DrawVkInfo.h
index 5c59657..8f7063d 100644
--- a/libs/hwui/private/hwui/DrawVkInfo.h
+++ b/libs/hwui/private/hwui/DrawVkInfo.h
@@ -71,6 +71,11 @@
 
   // Input: Whether destination surface is offscreen surface.
   bool is_layer;
+
+  // The current HDR/SDR ratio that we are rendering to. The transform to SDR will already
+  // be baked into the color_space_ptr, so this is just to indicate the amount of extended
+  // range is available if desired
+  float currentHdrSdrRatio;
 };
 
 }  // namespace uirenderer