skybox: added moon and stars

src/graphics/GfxContext.cpp

@@ -11,6 +11,9 @@ GfxContext::GfxContext(const GfxContext* parent, Viewport& viewport, Batch2D* g2
 GfxContext::~GfxContext() {
     if (parent == nullptr)
         return;
+    if (depthMask_ != parent->depthMask_) {
+        glDepthMask(parent->depthMask_);
+    }
     if (depthTest_ != parent->depthTest_) {
         if (depthTest_) glDisable(GL_DEPTH_TEST);
         else glEnable(GL_DEPTH_TEST);
@@ -19,6 +22,9 @@ GfxContext::~GfxContext() {
         if (cullFace_) glDisable(GL_CULL_FACE);
         else glEnable(GL_CULL_FACE);
     }
+    if (blendMode_ != parent->blendMode_) {
+        Window::setBlendMode(parent->blendMode_);
+    }
 }
 
 const Viewport& GfxContext::getViewport() const {
@@ -36,11 +42,18 @@ GfxContext GfxContext::sub() const {
     return ctx;
 }
 
+void GfxContext::depthMask(bool flag) {
+    if (depthMask_ == flag)
+        return;
+    depthMask_ = flag;
+    glDepthMask(GL_FALSE + flag);
+}
+
 void GfxContext::depthTest(bool flag) {
     if (depthTest_ == flag)
         return;
     depthTest_ = flag;
-    if (depthTest_) {
+    if (flag) {
         glEnable(GL_DEPTH_TEST);
     } else {
         glDisable(GL_DEPTH_TEST);
@@ -51,9 +64,16 @@ void GfxContext::cullFace(bool flag) {
     if (cullFace_ == flag)
         return;
     cullFace_ = flag;
-    if (cullFace_) {
+    if (flag) {
         glEnable(GL_CULL_FACE);
     } else {
         glDisable(GL_CULL_FACE);
     }
-}
+}
+
+void GfxContext::blendMode(blendmode mode) {
+    if (blendMode_ == mode)
+        return;
+    blendMode_ = mode;
+    Window::setBlendMode(mode);
+}