#2590 Radeon mac optimization pass (#3277)

- Skip updating of reflection probes that are not the default probe when probe coverage is set to "None"
- enable RenderAppleUseMultGL and disable occlusion culling on Macs with AMD GPUs
- Reduce the number of texture decode threads on Macs with intel cpus.
- Move texture deletion to LLImageGL::updateClass and prevent textures from staying resident in vram longer than 3 frames
- Disable SSAO by default on Macs with intel CPUs

1 files changed, 36 insertions, 16 deletions

diff --git a/indra/llwindow/llwindowmacosx.cpp b/indra/llwindow/llwindowmacosx.cpp
index 80001b14ee..f26d692363 100644
--- a/indra/llwindow/llwindowmacosx.cpp
+++ b/indra/llwindow/llwindowmacosx.cpp
@@ -68,6 +68,41 @@ namespace
 
 bool LLWindowMacOSX::sUseMultGL = false;
 
+//static
+void LLWindowMacOSX::setUseMultGL(bool use_mult_gl)
+{
+    bool was_enabled = sUseMultGL;
+
+    sUseMultGL = use_mult_gl;
+
+    if (gGLManager.mInited)
+    {
+        CGLContextObj ctx = CGLGetCurrentContext();
+        //enable multi-threaded OpenGL (whether or not sUseMultGL actually changed)
+        if (sUseMultGL)
+        {
+            CGLError cgl_err;
+
+            cgl_err =  CGLEnable( ctx, kCGLCEMPEngine);
+
+            if (cgl_err != kCGLNoError )
+            {
+                LL_INFOS("GLInit") << "Multi-threaded OpenGL not available." << LL_ENDL;
+                sUseMultGL = false;
+            }
+            else
+            {
+                LL_INFOS("GLInit") << "Multi-threaded OpenGL enabled." << LL_ENDL;
+            }
+        }
+        else if (was_enabled)
+        {
+            CGLDisable( ctx, kCGLCEMPEngine);
+            LL_INFOS("GLInit") << "Multi-threaded OpenGL disabled." << LL_ENDL;
+        }
+    }
+}
+
 // Cross-platform bits:
 
 bool check_for_card(const char* RENDERER, const char* bad_card)
@@ -704,23 +739,8 @@ bool LLWindowMacOSX::createContext(int x, int y, int width, int height, int bits
     // Disable vertical sync for swap
     toggleVSync(enable_vsync);
 
-    //enable multi-threaded OpenGL
-    if (sUseMultGL)
-    {
-        CGLError cgl_err;
-        CGLContextObj ctx = CGLGetCurrentContext();
-
-        cgl_err =  CGLEnable( ctx, kCGLCEMPEngine);
+    setUseMultGL(sUseMultGL);
 
-        if (cgl_err != kCGLNoError )
-        {
-            LL_INFOS("GLInit") << "Multi-threaded OpenGL not available." << LL_ENDL;
-        }
-        else
-        {
-            LL_INFOS("GLInit") << "Multi-threaded OpenGL enabled." << LL_ENDL;
-        }
-    }
     makeFirstResponder(mWindow, mGLView);
 
     return true;