OSX: don't avoid unsync mapping on nvida gpus just because the windows driver doesn't like it

OSX has their own driver, so performance issues aren't shared with the nvidia driver (unlike the closed source linux and windows nvidia driver). So now they'll also use the MapAndSync backend like all other osx drivers.

fixes issue 6596

I've also cleaned up the if/else block selecting the best backend a bit.

1 files changed, 35 insertions, 19 deletions

diff --git a/Source/Core/VideoBackends/OGL/StreamBuffer.cpp b/Source/Core/VideoBackends/OGL/StreamBuffer.cpp
index 71bfa404f6..f21ab60a50 100644
--- a/Source/Core/VideoBackends/OGL/StreamBuffer.cpp
+++ b/Source/Core/VideoBackends/OGL/StreamBuffer.cpp
@@ -152,7 +152,7 @@ public:
 			m_iterator = 0;
 		}
 		u8* pointer = (u8*)glMapBufferRange(m_buffertype, m_iterator, size,
-			GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT | GL_MAP_FLUSH_EXPLICIT_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
+			GL_MAP_WRITE_BIT | GL_MAP_FLUSH_EXPLICIT_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
 		return std::make_pair(pointer, m_iterator);
 	}
 
@@ -187,7 +187,7 @@ public:
 		Align(stride);
 		AllocMemory(size);
 		u8* pointer = (u8*)glMapBufferRange(m_buffertype, m_iterator, size,
-			GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT | GL_MAP_FLUSH_EXPLICIT_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
+			GL_MAP_WRITE_BIT | GL_MAP_FLUSH_EXPLICIT_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
 		return std::make_pair(pointer, m_iterator);
 	}
 
@@ -346,24 +346,40 @@ public:
 // choose best streaming library based on the supported extensions and known issues
 StreamBuffer* StreamBuffer::Create(u32 type, size_t size)
 {
-	bool nvidia = !strcmp(g_ogl_config.gl_vendor, "NVIDIA Corporation");
-
-	if (g_ogl_config.bSupportsGLBufferStorage &&
-		!(DriverDetails::HasBug(DriverDetails::BUG_BROKENBUFFERSTORAGE) && type == GL_ARRAY_BUFFER))
-		return new BufferStorage(type, size);
-	else if(!g_ogl_config.bSupportsGLBaseVertex && !DriverDetails::HasBug(DriverDetails::BUG_BROKENBUFFERSTREAM))
-		return new BufferSubData(type, size);
-	else if(!g_ogl_config.bSupportsGLBaseVertex)
+	// without basevertex support, only streaming methods whith uploads everything to zero works fine:
+	if(!g_ogl_config.bSupportsGLBaseVertex)
+	{
+		if(!DriverDetails::HasBug(DriverDetails::BUG_BROKENBUFFERSTREAM))
+			return new BufferSubData(type, size);
+
+		// BufferData is by far the worst way, only use it if needed
 		return new BufferData(type, size);
-	else if(g_ogl_config.bSupportsGLSync && g_ogl_config.bSupportsGLPinnedMemory &&
-		!(DriverDetails::HasBug(DriverDetails::BUG_BROKENPINNEDMEMORY) && type == GL_ELEMENT_ARRAY_BUFFER))
-		return new PinnedMemory(type, size);
-	else if(nvidia)
-		return new BufferSubData(type, size);
-	else if(g_ogl_config.bSupportsGLSync)
-		return new MapAndSync(type, size);
-	else
-		return new MapAndOrphan(type, size);
+	}
+
+	// Prefer the syncing buffers over the orphaning one
+	if(g_ogl_config.bSupportsGLSync)
+	{
+		// try to use buffer storage whenever possible
+		if (g_ogl_config.bSupportsGLBufferStorage &&
+			!(DriverDetails::HasBug(DriverDetails::BUG_BROKENBUFFERSTORAGE) && type == GL_ARRAY_BUFFER))
+			return new BufferStorage(type, size);
+
+		// pinned memory is almost as fine
+		if(g_ogl_config.bSupportsGLPinnedMemory &&
+			!(DriverDetails::HasBug(DriverDetails::BUG_BROKENPINNEDMEMORY) && type == GL_ELEMENT_ARRAY_BUFFER))
+			return new PinnedMemory(type, size);
+
+		// don't fall back to MapAnd* for nvidia drivers
+		if(DriverDetails::HasBug(DriverDetails::BUG_BROKENUNSYNCMAPPING))
+			return new BufferSubData(type, size);
+
+		// mapping fallback
+		if(g_ogl_config.bSupportsGLSync)
+			return new MapAndSync(type, size);
+	}
+
+	// default fallback, should work everywhere, but isn't the best way to do this job
+	return new MapAndOrphan(type, size);
 }
 
 }