add remote logging system using curl, normalize log messages removing \n, fix fra shaders precision issue, enable core and forward comp. in WGL, disable multisampling,

engine/brush.cpp

@@ -106,19 +106,19 @@ bool ui::BrushMesh::create()
         "}";
     static const char* shader_stroke_inst_f =
         SHADER_VERSION
-        "uniform sampler2D tex;"
-        "uniform vec4 col;"
-        "in float alpha;"
-        "in vec3 uv;"
-        "out vec4 frag;"
+        "uniform mediump sampler2D tex;"
+        "uniform mediump vec4 col;"
+        "in mediump float alpha;"
+        "in mediump vec3 uv;"
+        "out mediump vec4 frag;"
         "void main(){"
-        "   float a = (1.0 - texture(tex, uv.xy).r) * alpha;"
+        "   mediump float a = (1.0 - texture(tex, uv.xy).r) * alpha;"
         "   frag = vec4(col.rgb, a);"
         "}";
 
 
     if (!shader.create(shader_stroke_inst_v, shader_stroke_inst_f))
-        LOG("Failed to create shader Texture");
+        LOG("Failed to create shader BrushMesh Stroke");
 
     loc_flow = shader.GetAttribLocation("a_flow");
     loc_mvp = shader.GetAttribLocation("a_mvp");