Enable KHR_robustness option

CMakeLists.txt

@@ -139,6 +139,7 @@ option(BUILD_MANUAL_TESTS "Build manual tests" ${BUILD_MANUAL_TESTS_OPTION})
 option(BUILD_TOOLS "Build tools" ${BUILD_TOOLS_OPTION})
 option(BUILD_INSTALLER "Build installer" ${BUILD_INSTALLER_OPTION})
 option(USE_GLES "Use OpenGL ES" ${GLES_OPTION})
+option(USE_KHR_ROBUSTNESS "Use KHR_robustness" OFF)
 option(DISABLE_QML "Disable QML" ${DISABLE_QML_OPTION})
 option(DISABLE_KTX_CACHE "Disable KTX Cache" OFF)
 option(
@@ -149,6 +150,10 @@ option(
 
 set(PLATFORM_QT_GL OpenGL)
 
+if (USE_KHR_ROBUSTNESS)
+  add_definitions(-DUSE_KHR_ROBUSTNESS)
+endif()
+
 if (USE_GLES)
   add_definitions(-DUSE_GLES)
   add_definitions(-DGPU_POINTER_STORAGE_SHARED)

libraries/gl/src/gl/Context.cpp

@@ -27,6 +27,10 @@
 #include "GLHelpers.h"
 #include "QOpenGLContextWrapper.h"
 
+#if defined(GL_CUSTOM_CONTEXT)
+#include <QtPlatformHeaders/QWGLNativeContext>
+#endif
+
 using namespace gl;
 
 #if defined(GL_CUSTOM_CONTEXT)
@@ -42,7 +46,10 @@ std::atomic<size_t> Context::_totalSwapchainMemoryUsage { 0 };
 size_t Context::getSwapchainMemoryUsage() { return _totalSwapchainMemoryUsage.load(); }
 
 size_t Context::evalSurfaceMemoryUsage(uint32_t width, uint32_t height, uint32_t pixelSize) {
-    return width * height * pixelSize;
+    size_t result = width;
+    result *= height;
+    result *= pixelSize;
+    return result;
 }
 
 void Context::updateSwapchainMemoryUsage(size_t prevSize, size_t newSize) {
@@ -126,7 +133,7 @@ void Context::clear() {
 #if defined(GL_CUSTOM_CONTEXT)
 
 static void setupPixelFormatSimple(HDC hdc) {
-    // FIXME build the PFD based on the 
+    // FIXME build the PFD based on the
     static const PIXELFORMATDESCRIPTOR pfd =    // pfd Tells Windows How We Want Things To Be
     {
         sizeof(PIXELFORMATDESCRIPTOR),         // Size Of This Pixel Format Descriptor
@@ -176,6 +183,7 @@ static void setupPixelFormatSimple(HDC hdc) {
 #define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
 
 // Context create flag bits
+#define WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
 #define WGL_CONTEXT_DEBUG_BIT_ARB 0x00000001
 #define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
 #define WGL_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
@@ -196,17 +204,17 @@ GLAPI PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
 Q_GUI_EXPORT QOpenGLContext *qt_gl_global_share_context();
 
 #if defined(GL_CUSTOM_CONTEXT)
-bool Context::makeCurrent() {	
-    BOOL result = wglMakeCurrent(_hdc, _hglrc);	
-    assert(result);	
-    updateSwapchainMemoryCounter();	
-     return result;	
-}	
- void Context::swapBuffers() {	
-    SwapBuffers(_hdc);	
-}	
- void Context::doneCurrent() {	
-    wglMakeCurrent(0, 0);	
+bool Context::makeCurrent() {
+    BOOL result = wglMakeCurrent(_hdc, _hglrc);
+    assert(result);
+    updateSwapchainMemoryCounter();
+    return result;
+}
+void Context::swapBuffers() {
+    SwapBuffers(_hdc);
+}
+void Context::doneCurrent() {
+    wglMakeCurrent(0, 0);
 }
 #endif
 
@@ -305,11 +313,18 @@ void Context::create(QOpenGLContext* shareContext) {
 #else
             contextAttribs.push_back(WGL_CONTEXT_CORE_PROFILE_BIT_ARB);
 #endif
-            contextAttribs.push_back(WGL_CONTEXT_FLAGS_ARB);
-            if (enableDebugLogger()) {
-                contextAttribs.push_back(WGL_CONTEXT_DEBUG_BIT_ARB);
-            } else {
-                contextAttribs.push_back(0);
+            {
+                int contextFlags = 0;
+                if (enableDebugLogger()) {
+                    contextFlags |= WGL_CONTEXT_DEBUG_BIT_ARB;
+                }
+#ifdef USE_KHR_ROBUSTNESS
+                contextFlags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB;
+#endif
+                if (contextFlags != 0) {
+                    contextAttribs.push_back(WGL_CONTEXT_FLAGS_ARB);
+                    contextAttribs.push_back(contextFlags);
+                }
             }
             contextAttribs.push_back(0);
             HGLRC shareHglrc = nullptr;
@@ -323,8 +338,8 @@ void Context::create(QOpenGLContext* shareContext) {
         if (_hglrc != 0) {
             createWrapperContext();
         }
-    } 
-    
+    }
+
     if (_hglrc == 0) {
         // fallback, if the context creation failed, or USE_CUSTOM_CONTEXT is false
         qtCreate(shareContext);

libraries/gl/src/gl/Context.h

@@ -23,7 +23,7 @@ class QOpenGLContext;
 class QThread;
 class QOpenGLDebugMessage;
 
-#if defined(Q_OS_WIN) && defined(USE_GLES)
+#if defined(Q_OS_WIN) && (defined(USE_GLES) || defined(USE_KHR_ROBUSTNESS))
 //#if defined(Q_OS_WIN)
 #define GL_CUSTOM_CONTEXT
 #endif