Initialized variables passed to GL functions. Command buffer now only allows initialized variable...

third_party/gles2_book/Common/Source/esShader.c

 //
 // Book:      OpenGL(R) ES 2.0 Programming Guide
 // Authors:   Aaftab Munshi, Dan Ginsburg, Dave Shreiner
 // ISBN-10:   0321502795
 // ISBN-13:   9780321502797
 // Publisher: Addison-Wesley Professional
 // URLs:      http://safari.informit.com/9780321563835
 //            http://www.opengles-book.com
 //
 
@@ skipping 24 matching lines @@
 
 //
 ///
 /// \brief Load a shader, check for compile errors, print error messages to output log
 /// \param type Type of shader (GL_VERTEX_SHADER or GL_FRAGMENT_SHADER)
 /// \param shaderSrc Shader source string
 /// \return A new shader object on success, 0 on failure
 //
 GLuint esLoadShader ( GLenum type, const char *shaderSrc )
 {
-   GLuint shader;
-   GLint compiled;
+   GLuint shader = 0;
+   GLint compiled = 0;
    
    // Create the shader object
    shader = glCreateShader ( type );
 
    if ( shader == 0 )
         return 0;
 
    // Load the shader source
    glShaderSource ( shader, 1, &shaderSrc, NULL );
    
@@ skipping 31 matching lines @@
 //
 ///
 /// \brief Load a vertex and fragment shader, create a program object, link program.
 //         Errors output to log.
 /// \param vertShaderSrc Vertex shader source code
 /// \param fragShaderSrc Fragment shader source code
 /// \return A new program object linked with the vertex/fragment shader pair, 0 on failure
 //
 GLuint esLoadProgram ( const char *vertShaderSrc, const char *fragShaderSrc )
 {
-   GLuint vertexShader;
-   GLuint fragmentShader;
-   GLuint programObject;
-   GLint linked;
+   GLuint vertexShader = 0;
+   GLuint fragmentShader = 0;
+   GLuint programObject = 0;
+   GLint linked = 0;
 
    // Load the vertex/fragment shaders
    vertexShader = esLoadShader ( GL_VERTEX_SHADER, vertShaderSrc );
    if ( vertexShader == 0 )
       return 0;
 
    fragmentShader = esLoadShader ( GL_FRAGMENT_SHADER, fragShaderSrc );
    if ( fragmentShader == 0 )
    {
       glDeleteShader( vertexShader );
@@ skipping 34 matching lines @@
       glDeleteProgram ( programObject );
       return 0;
    }
 
    // Free up no longer needed shader resources
    glDeleteShader ( vertexShader );
    glDeleteShader ( fragmentShader );
 
    return programObject;
 }