Preparing to add texture to quad

opengl-test-two/trimap.fragmentshader

@@ -1,8 +1,11 @@
-
 #version 330 core
 
+uniform sampler2D texture;
+in vec2 vTexCoord;
 out vec4 color;
 
 void main(){
-  color = vec3(0.5,0,0);
+  //color = vec4(1f,0f,0f,1.0f);
+  vec2 tcoord=vec2(0.5f,0.5f);
+  color = vec4(texelFetch(texture, ivec2(vTexCoord), 0).rgb, 1);
 }