diff --git a/shader/picture/arc.frag b/shader/picture/arc.frag
new file mode 100644
index 000000000..f8595b223
--- /dev/null
+++ b/shader/picture/arc.frag
@@ -0,0 +1,13 @@
+#version 450 core
+in vec4 vCol;
+in vec3 vPos;
+in vec3 vparams;
+layout (location=0) out vec4 fCol;
+layout (location=1) out vec4 fPos;
+void main()
+{
+  float d = (dot(vec2(vparams.xy),vec2(vparams.xy)));
+  if ( d > 1 || d < (vparams.z * vparams.z) ) {discard;}
+  fCol = vCol;
+  fPos = vec4(vPos,1);
+}
diff --git a/shader/picture/arc.vert b/shader/picture/arc.vert
new file mode 100644
index 000000000..27c400171
--- /dev/null
+++ b/shader/picture/arc.vert
@@ -0,0 +1,15 @@
+#version 450 core
+struct PosColBox { vec4 pos; vec4 col; vec4 box; };
+layout (std430, binding = 12) readonly buffer Data { PosColBox data[]; };
+layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
+layout (location = 0) uniform int layoff;
+out vec4 vCol;
+out vec3 vPos;
+out vec3 vparams;
+void main() {
+    vec4 p = data[gl_VertexID].pos;
+    gl_Position = theMat * p;
+    vCol = data[gl_VertexID].col;
+    vparams = data[gl_VertexID].box.xyz;
+    vPos = p.xyz;
+}
diff --git a/shader/picture/basic.frag b/shader/picture/basic.frag
new file mode 100644
index 000000000..62e8b8b09
--- /dev/null
+++ b/shader/picture/basic.frag
@@ -0,0 +1,10 @@
+#version 450 core
+in vec4 vCol;
+in vec3 vPos;
+layout (location=0) out vec4 fCol;
+layout (location=1) out vec4 fPos;
+void main()
+{
+  fCol = vCol;
+  fPos = vec4(vPos,1);
+}
diff --git a/shader/picture/basic.vert b/shader/picture/basic.vert
new file mode 100644
index 000000000..5b858b5e9
--- /dev/null
+++ b/shader/picture/basic.vert
@@ -0,0 +1,13 @@
+#version 450 core
+struct PosCol { vec4 pos; vec4 col; };
+layout (std430, binding = 10) readonly buffer Data { PosCol data[]; };
+layout (location = 0) uniform int layoff;
+layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
+out vec4 vCol;
+out vec3 vPos;
+void main() {
+  vec4 p = data[gl_VertexID].pos;
+  gl_Position = theMat * p;
+  vCol = data[gl_VertexID].col;
+  vPos = p.xyz;
+}
diff --git a/shader/picture/ellipse.frag b/shader/picture/ellipse.frag
new file mode 100644
index 000000000..576a4c13c
--- /dev/null
+++ b/shader/picture/ellipse.frag
@@ -0,0 +1,14 @@
+#version 450 core
+layout (location=0) out vec4 fCol;
+layout (location=1) out vec4 fPos;
+in vec4 gColC;
+in vec4 gColE;
+in vec3 gPos;
+in vec2 gBoundingBox;
+void main() {
+  float d = dot(gBoundingBox,gBoundingBox);
+  if ( d > 1) { discard; }
+  fCol = mix (gColE , gColC, d);
+  fPos = vec4(gPos,1);
+  
+}
diff --git a/shader/picture/ellipse.vert b/shader/picture/ellipse.vert
new file mode 100644
index 000000000..21ec496cb
--- /dev/null
+++ b/shader/picture/ellipse.vert
@@ -0,0 +1,33 @@
+#version 450 core
+struct PosCol { vec4 posx; vec4 colx; };
+layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
+layout (std430, binding = 13) readonly buffer Data { PosCol data[]; };
+layout (location = 0) uniform int n;
+out vec4 gColC; // center color
+out vec4 gColE; // edge color
+out vec2 gBoundingBox;
+out vec3 gPos;
+const int ks[6] = //    
+    {1,0,2  //  2--3    
+    ,2,0,3  //  |  |    
+    };      //  1--0    
+            //          
+const vec2 bs[4] =
+    { vec2( 1, 1)
+    , vec2(-1, 1)
+    , vec2(-1,-1)
+    , vec2( 1,-1)
+    } ;
+void main()
+{
+    int i0 = n + (3 * ((gl_VertexID-n)/6) );
+    gColC = data[i0].colx;
+    gColE = data[i0+1].colx;
+    int k = ks[(gl_VertexID - n) % 6];
+    gBoundingBox = bs[k];
+    gPos = (k > 2.5 
+            ? data[i0].posx + data[i0+2].posx - data[i0+1].posx
+            : data[i0+k].posx
+           ).xyz;
+  gl_Position = theMat * vec4(gPos,1);
+}