GfxContext, render refactor

src/graphics/GfxContext.cpp

@@ -0,0 +1,59 @@
+#include "GfxContext.h"
+
+#include <GL/glew.h>
+
+#include "Batch2D.h"
+
+GfxContext::GfxContext(const GfxContext* parent, Viewport& viewport, Batch2D* g2d)
+    : parent(parent), viewport(viewport), g2d(g2d) {
+}
+
+GfxContext::~GfxContext() {
+    if (parent == nullptr)
+        return;
+    if (depthTest_ != parent->depthTest_) {
+        if (depthTest_) glDisable(GL_DEPTH_TEST);
+        else glEnable(GL_DEPTH_TEST);
+    }
+    if (cullFace_ != parent->cullFace_) {
+        if (cullFace_) glDisable(GL_CULL_FACE);
+        else glEnable(GL_CULL_FACE);
+    }
+}
+
+const Viewport& GfxContext::getViewport() const {
+    return viewport;
+}
+
+Batch2D* GfxContext::getBatch2D() const {
+    return g2d;
+}
+
+GfxContext GfxContext::sub() const {
+    auto ctx = GfxContext(this, viewport, g2d);
+    ctx.depthTest_ = depthTest_;
+    ctx.cullFace_ = cullFace_;
+    return ctx;
+}
+
+void GfxContext::depthTest(bool flag) {
+    if (depthTest_ == flag)
+        return;
+    depthTest_ = flag;
+    if (depthTest_) {
+        glEnable(GL_DEPTH_TEST);
+    } else {
+        glDisable(GL_DEPTH_TEST);
+    }
+}
+
+void GfxContext::cullFace(bool flag) {
+    if (cullFace_ == flag)
+        return;
+    cullFace_ = flag;
+    if (cullFace_) {
+        glEnable(GL_CULL_FACE);
+    } else {
+        glDisable(GL_CULL_FACE);
+    }
+}