diff --git a/src/common/nvg.cpp b/src/common/nvg.cpp
index c43c3d4cb..3a6cf6d11 100644
--- a/src/common/nvg.cpp
+++ b/src/common/nvg.cpp
@@ -1,6 +1,7 @@
 #include "nvg.hpp"
 
 namespace kb {
+namespace viz2d {
 namespace nvg {
 namespace detail {
 class NVG;
@@ -11,7 +12,7 @@ void set_current_context(NVGcontext* ctx) {
     nvg_instance = new NVG(ctx);
 }
 
-NVG* get_current_context() {
+static NVG* get_current_context() {
     assert(nvg_instance != nullptr);
     return nvg_instance;
 }
@@ -81,15 +82,7 @@ void NVG::textBoxBounds(float x, float y, float breakRowWidth, const char* strin
 }
 
 int NVG::textGlyphPositions(float x, float y, const char* string, const char* end, GlyphPosition* positions, int maxPositions) {
-    std::vector<NVGglyphPosition> gp(maxPositions);
-    int result = nvgTextGlyphPositions(getContext(), x, y, string, end, gp.data(), maxPositions);
-    for(int i = 0; i < maxPositions; ++i) {
-        positions[i].str = gp[i].str;
-        positions[i].x = gp[i].x;
-        positions[i].minx = gp[i].minx;
-        positions[i].maxx = gp[i].maxx;
-    }
-    return result;
+    return nvgTextGlyphPositions(getContext(), x, y, string, end, positions, maxPositions);
 }
 
 void NVG::textMetrics(float* ascender, float* descender, float* lineh) {
@@ -97,17 +90,7 @@ void NVG::textMetrics(float* ascender, float* descender, float* lineh) {
 }
 
 int NVG::textBreakLines(const char* string, const char* end, float breakRowWidth, TextRow* rows, int maxRows) {
-    NVGtextRow tr[maxRows];
-    int result = nvgTextBreakLines(getContext(),string, end, breakRowWidth, tr, maxRows);
-    for(int i = 0; i < maxRows; ++i) {
-        rows[i].start = tr[i].start;
-        rows[i].end = tr[i].end;
-        rows[i].next = tr[i].next;
-        rows[i].width = tr[i].width;
-        rows[i].minx = tr[i].minx;
-        rows[i].maxx = tr[i].maxx;
-    }
-    return result;
+    return nvgTextBreakLines(getContext(),string, end, breakRowWidth, rows, maxRows);
 }
 
 void NVG::save() {
@@ -310,9 +293,7 @@ void NVG::stroke() {
 
 Paint NVG::linearGradient(float sx, float sy, float ex, float ey, const cv::Scalar& icol, const cv::Scalar& ocol) {
     NVGpaint np = nvgLinearGradient(getContext(), sx, sy, ex, ey, nvgRGBA(icol[2],icol[1],icol[0],icol[3]), nvgRGBA(ocol[2],ocol[1],ocol[0],ocol[3]));
-    Paint p(np);
-    cerr << "paint " << p.innerColor << ":" << p.outerColor << endl;
-    return p;
+    return Paint(np);
 }
 
 Paint NVG::boxGradient(float x, float y, float w, float h, float r, float f, const cv::Scalar& icol, const cv::Scalar& ocol) {
@@ -640,5 +621,6 @@ void intersectScissor(float x, float y, float w, float h) {
 void resetScissor() {
     detail::get_current_context()->resetScissor();
 }
-} //namespace nvg
-} //namespace kb
+}
+}
+}
diff --git a/src/common/nvg.hpp b/src/common/nvg.hpp
index 6e02818df..4b76c048a 100644
--- a/src/common/nvg.hpp
+++ b/src/common/nvg.hpp
@@ -6,20 +6,13 @@
 #include <nanogui/opengl.h>
 
 namespace kb {
+namespace viz2d {
 namespace nvg {
 
-struct TextRow {
-    const char* start;  // Pointer to the input text where the row starts.
-    const char* end;    // Pointer to the input text where the row ends (one past the last character).
-    const char* next;   // Pointer to the beginning of the next row.
-    float width;        // Logical width of the row.
-    float minx, maxx;   // Actual bounds of the row. Logical with and bounds can differ because of kerning and some parts over extending.
+struct TextRow : public NVGtextRow {
 };
 
-struct GlyphPosition {
-    const char* str;    // Position of the glyph in the input string.
-    float x;            // The x-coordinate of the logical glyph position.
-    float minx, maxx;   // The bounds of the glyph shape.
+struct GlyphPosition : public NVGglyphPosition {
 };
 
 struct Paint {
@@ -156,7 +149,7 @@ void resetScissor();
 static NVG* nvg_instance;
 
 void set_current_context(NVGcontext* ctx);
-NVG* get_current_context();
+static NVG* get_current_context();
 } // namespace detail
 
 int createFont(const char* name, const char* filename);
@@ -240,8 +233,9 @@ Paint imagePattern(float ox, float oy, float ex, float ey, float angle, int imag
 void scissor(float x, float y, float w, float h);
 void intersectScissor(float x, float y, float w, float h);
 void resetScissor();
-} // namespace nvg
-} // namespace kb
+}
+}
+}