From 2bfc0d9604cfab66b54762f1cf4509a517cb666f Mon Sep 17 00:00:00 2001
From: Dmitry Kunin <dkunin@mapswith.me>
Date: Wed, 8 Jan 2014 13:55:30 +0300
Subject: [PATCH] [gl] getProgramiv wrapper.

---
 drape/glconstants.cpp |  2 ++
 drape/glconstants.hpp |  3 +++
 drape/glfunctions.cpp | 12 ++++++++++++
 drape/glfunctions.hpp |  2 ++
 4 files changed, 19 insertions(+)

diff --git a/drape/glconstants.cpp b/drape/glconstants.cpp
index aacde4e8ad..934b6b8bab 100644
--- a/drape/glconstants.cpp
+++ b/drape/glconstants.cpp
@@ -25,4 +25,6 @@ namespace GLConst
   const glConst GLUnsignedIntType     = GL_UNSIGNED_INT;
   const glConst GLFloatType           = GL_FLOAT;
   const glConst GLDoubleType          = GL_DOUBLE;
+
+  const glConst GLActiveUniforms      = GL_ACTIVE_UNIFORMS;
 }
diff --git a/drape/glconstants.hpp b/drape/glconstants.hpp
index c22fe1d560..9136f2b432 100644
--- a/drape/glconstants.hpp
+++ b/drape/glconstants.hpp
@@ -33,4 +33,7 @@ namespace GLConst
   extern const glConst GLUnsignedIntType;
   extern const glConst GLFloatType;
   extern const glConst GLDoubleType;
+
+  // Program object parameter names
+  extern const glConst GLActiveUniforms;
 }
diff --git a/drape/glfunctions.cpp b/drape/glfunctions.cpp
index 04f96d3c16..79ea05b53a 100644
--- a/drape/glfunctions.cpp
+++ b/drape/glfunctions.cpp
@@ -69,6 +69,8 @@ namespace
 
   void (*glUniformMatrix4fvFn)(GLint location, GLsizei count, GLboolean transpose, const GLfloat * value) = NULL;
 
+  void (*glGetProgramivFn)(GLuint program, GLenum paramname, GLint * paramvalue)                          = NULL;
+
   const int GLCompileStatus = GL_COMPILE_STATUS;
   const int GLLinkStatus = GL_LINK_STATUS;
 }
@@ -137,6 +139,8 @@ void GLFunctions::Init()
   glUniform4fFn = &::glUniform4f;
 
   glUniformMatrix4fvFn = &glUniformMatrix4fv;
+
+  glGetProgramivFn = &::glGetProgramiv;
 }
 
 bool GLFunctions::glHasExtension(const string & name)
@@ -432,6 +436,14 @@ uint32_t GLFunctions::glGetCurrentProgram()
   return programIndex;
 }
 
+int32_t GLFunctions::glGetProgramiv(uint32_t program, glConst paramname)
+{
+  ASSERT(glGetProgramivFn != NULL, ());
+  int32_t paramvalue = 0;
+  GLCHECK(glGetProgramivFn(program, paramname, &paramvalue));
+  return paramvalue;
+}
+
 void GLFunctions::glActiveTexture(uint32_t samplerBlock)
 {
   GLCHECK(::glActiveTexture(GL_TEXTURE0 + samplerBlock));
diff --git a/drape/glfunctions.hpp b/drape/glfunctions.hpp
index 4c99e43858..c9eb69ceb0 100644
--- a/drape/glfunctions.hpp
+++ b/drape/glfunctions.hpp
@@ -75,6 +75,8 @@ public:
 
   static uint32_t glGetCurrentProgram();
 
+  static int32_t glGetProgramiv(uint32_t program, glConst paramname);
+
   // Textures support
   static void glActiveTexture(uint32_t samplerBlock);
   static uint32_t glGenTexture();