modify screen text color to blue

Change-Id: I80435a980550a2b74657442ef1b44ca8e3825a97

chart2/opengl/screenTextFragmentShader.glsl

@@ -9,10 +9,11 @@
 
 varying vec2 vTexCoord;
 uniform sampler2D TextTex;
+uniform vec4 textColor;
 void main()
 {
     vec3 color = texture2D(TextTex, vTexCoord).rgb;
-    gl_FragColor = vec4(color, 1.0 - color.r);
+    gl_FragColor = vec4(textColor.rgb, 1.0 - color.r);
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

chart2/source/view/inc/GL3DRenderer.hxx

@@ -323,6 +323,7 @@ private:
         GLint m_ScreenTextVertexID;
         GLint m_ScreenTextTexCoordID;
         GLint m_ScreenTextTexID;
+        GLint m_ScreenTextColorID;
 
         // CommonProID
         GLint m_CommonProID;

chart2/source/view/main/GL3DRenderer.cxx

@@ -190,6 +190,7 @@ OpenGL3DRenderer::ShaderResources::ShaderResources()
     , m_ScreenTextVertexID(0)
     , m_ScreenTextTexCoordID(0)
     , m_ScreenTextTexID(0)
+    , m_ScreenTextColorID(0)
     , m_CommonProID(0)
     , m_2DVertexID(0)
     , m_2DColorID(0)
@@ -305,6 +306,7 @@ void OpenGL3DRenderer::ShaderResources::LoadShaders()
     m_ScreenTextVertexID = glGetAttribLocation(m_ScreenTextProID, "vPosition");
     m_ScreenTextTexCoordID = glGetAttribLocation(m_ScreenTextProID, "texCoord");
     m_ScreenTextTexID = glGetUniformLocation(m_ScreenTextProID, "TextTex");
+    m_ScreenTextColorID = glGetUniformLocation(m_ScreenTextProID, "textColor");
 
     m_CommonProID = OpenGLHelper::LoadShaders("commonVertexShader", "commonFragmentShader");
     m_MatrixID = glGetUniformLocation(m_CommonProID, "MVP");
@@ -1877,6 +1879,8 @@ void OpenGL3DRenderer::ReleaseScreenTextTexture()
 void OpenGL3DRenderer::RenderScreenTextShape()
 {
     glUseProgram(maResources.m_ScreenTextProID);
+    glm::vec4 textColor = glm::vec4(0.0, 0.0, 1.0, 1.0);
+    glUniform4fv(maResources.m_ScreenTextColorID, 1, &textColor[0]);
     CHECK_GL_ERROR();
     for (size_t i = 0; i < m_ScreenTextInfoList.size(); i++)
     {