1 files changed, 45 insertions, 11 deletions

diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp
index 6bcc34938c..95575c009b 100644
--- a/indra/llrender/llimagegl.cpp
+++ b/indra/llrender/llimagegl.cpp
@@ -166,6 +166,8 @@ U64 LLImageGL::getTextureBytesAllocated()
 //statics
 
 U32 LLImageGL::sUniqueCount             = 0;
+std::atomic<U32> LLImageGL::sOOMErrorCount(0);
+thread_local bool LLImageGL::sStampBindFrame = true;
 U32 LLImageGL::sBindCount               = 0;
 S32 LLImageGL::sCount                   = 0;
 
@@ -777,6 +779,7 @@ void LLImageGL::setImage(const LLImageRaw* imageraw)
 bool LLImageGL::setImage(const U8* data_in, bool data_hasmips /* = false */, S32 usename /* = 0 */)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE;
+    LLImageGLStampBypass no_stamp; // upload binds are not visibility
 
     const bool is_compressed = isCompressed();
 
@@ -1502,6 +1505,12 @@ void LLImageGL::setManualImage(U32 target, S32 miplevel, S32 intformat, S32 widt
         {
             free_cur_tex_image();
         }
+
+        // Drain stale GL errors so an OOM detected below belongs to this alloc.
+        // Otherwise a failed glTexImage2D is swallowed in release while
+        // alloc_tex_image still counts the bytes, inflating the used-VRAM figure.
+        while (glGetError() != GL_NO_ERROR) {}
+
         const bool use_sub_image = should_stagger_image_set(compress);
         if (!use_sub_image)
         {
@@ -1511,19 +1520,30 @@ void LLImageGL::setManualImage(U32 target, S32 miplevel, S32 intformat, S32 widt
         else
         {
             // break up calls to a manageable size for the GL command buffer
-            {
-                LL_PROFILE_ZONE_NAMED("glTexImage2D alloc");
-                glTexImage2D(target, miplevel, intformat, width, height, 0, pixformat, pixtype, nullptr);
-            }
+            LL_PROFILE_ZONE_NAMED("glTexImage2D alloc");
+            glTexImage2D(target, miplevel, intformat, width, height, 0, pixformat, pixtype, nullptr);
+        }
 
-            U8* src = (U8*)(pixels);
-            if (src)
+        if (glGetError() == GL_OUT_OF_MEMORY)
+        {
+            ++sOOMErrorCount;
+            LL_WARNS_ONCE("Texture") << "glTexImage2D failed with GL_OUT_OF_MEMORY ("
+                                     << width << "x" << height << " mip " << miplevel
+                                     << ") - not counting bytes" << LL_ENDL;
+        }
+        else
+        {
+            if (use_sub_image)
             {
-                LL_PROFILE_ZONE_NAMED("glTexImage2D copy");
-                sub_image_lines(target, miplevel, 0, 0, width, height, pixformat, pixtype, src, width);
+                U8* src = (U8*)(pixels);
+                if (src)
+                {
+                    LL_PROFILE_ZONE_NAMED("glTexImage2D copy");
+                    sub_image_lines(target, miplevel, 0, 0, width, height, pixformat, pixtype, src, width);
+                }
             }
+            alloc_tex_image(width, height, intformat, 1);
         }
-        alloc_tex_image(width, height, intformat, 1);
     }
     stop_glerror();
 }
@@ -1668,6 +1688,7 @@ bool LLImageGL::createGLTexture(S32 discard_level, const U8* data_in, bool data_
     LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE;
     LL_PROFILE_GPU_ZONE("createGLTexture");
     checkActiveThread();
+    LLImageGLStampBypass no_stamp; // creation binds are not visibility
 
     bool main_thread = on_main_thread();
 
@@ -2090,12 +2111,21 @@ S32 LLImageGL::dimDerivedMaxDiscard(S32 width, S32 height)
 
 void LLImageGL::stampBound() const
 {
-    // Skip the store on same-frame re-binds - bindFast is per-draw and
-    // would dirty this cache line per bind per texture otherwise.
+    // Both stamps skip same-frame re-binds (bindFast runs per draw). They dedupe
+    // separately, so a non-camera pass touching the time stamp first doesn't stop
+    // a real camera bind from setting the frame stamp later the same frame.
     if (mLastBindTime != sLastFrameTime)
     {
         mLastBindTime = sLastFrameTime;
     }
+    if (sStampBindFrame)
+    {
+        const U32 frame = LLFrameTimer::getFrameCount();
+        if (mLastBindFrame != frame)
+        {
+            mLastBindFrame = frame;
+        }
+    }
 }
 
 S64 LLImageGL::getBytes(S32 discard_level) const
@@ -2520,6 +2550,10 @@ bool LLImageGL::scaleDown(S32 desired_discard)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE;
 
+    // Don't let eviction re-arm visibility: the glGenerateMipmap re-bind below
+    // would otherwise stamp mLastBindFrame and keep the texture fetch-eligible.
+    LLImageGLStampBypass no_stamp;
+
     if (mTarget != GL_TEXTURE_2D
         || mFormatInternal == -1 // not initialized
         )