Add support for detecting extensions

[libs/gl.git] / source / program.cpp

diff --git a/source/program.cpp b/source/program.cpp
index e0a685f15cb70a7bce1013bfcec44b1a725c600b..f34133faf767b1e905f7706e1caae938f606c6a4 100644 (file)
--- a/source/program.cpp
+++ b/source/program.cpp
@@ -5,8 +5,10 @@ Copyright © 2007 Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
-#define GL_GLEXT_PROTOTYPES
-#include "error.h"
+#include "arb_shader_objects.h"
+#include "arb_vertex_shader.h"
+#include "except.h"
+#include "extension.h"
 #include "program.h"
 #include "shader.h"
 
@@ -16,16 +18,23 @@ namespace Msp {
 namespace GL {
 
 Program::Program():
-       id(glCreateProgram()),
        del_shaders(false),
        linked(false)
-{ }
+{
+       require_extension("GL_ARB_shader_objects");
+       require_extension("GL_ARB_vertex_shader");
+
+       id=glCreateProgramObjectARB();
+}
 
 Program::Program(const string &vert, const string &frag):
-       id(glCreateProgram()),
        del_shaders(true),
        linked(false)
 {
+       require_extension("GL_ARB_shader_objects");
+       require_extension("GL_ARB_vertex_shader");
+
+       id=glCreateProgramObjectARB();
        attach_shader(*new Shader(VERTEX_SHADER, vert));
        attach_shader(*new Shader(FRAGMENT_SHADER, frag));
        link();
@@ -38,14 +47,14 @@ Program::~Program()
                for(list<Shader *>::iterator i=shaders.begin(); i!=shaders.end(); ++i)
                        delete *i;
        }
-       glDeleteProgram(id);
+       glDeleteObjectARB(id);
 }
 
 void Program::attach_shader(Shader &shader)
 {
        if(find(shaders.begin(), shaders.end(), &shader)==shaders.end())
        {
-               glAttachShader(id, shader.get_id());
+               glAttachObjectARB(id, shader.get_id());
                shaders.push_back(&shader);
        }
 }
@@ -56,7 +65,7 @@ void Program::detach_shader(Shader &shader)
        if(i!=shaders.end())
        {
                shaders.erase(i, shaders.end());
-               glDetachShader(id, shader.get_id());
+               glDetachObjectARB(id, shader.get_id());
        }
 }
 
@@ -67,7 +76,7 @@ void Program::set_del_shaders(bool ds)
 
 void Program::bind_attribute(int index, const string &name)
 {
-       glBindAttribLocation(id, index, name.c_str());
+       glBindAttribLocationARB(id, index, name.c_str());
 }
 
 bool Program::link()
@@ -76,7 +85,7 @@ bool Program::link()
                if(!(*i)->get_compiled() && !(*i)->compile())
                        return false;
 
-       glLinkProgram(id);
+       glLinkProgramARB(id);
        linked=get_param(GL_LINK_STATUS);
        return linked;
 }
@@ -84,7 +93,7 @@ bool Program::link()
 int Program::get_param(GLenum param) const
 {
        int value;
-       glGetProgramiv(id, param, &value);
+       glGetObjectParameterivARB(id, param, &value);
        return value;
 }
 
@@ -92,7 +101,7 @@ string Program::get_info_log() const
 {
        sizei len=get_param(GL_INFO_LOG_LENGTH);
        char log[len+1];
-       glGetProgramInfoLog(id, len+1, reinterpret_cast<GLsizei *>(&len), log);
+       glGetInfoLogARB(id, len+1, reinterpret_cast<GLsizei *>(&len), log);
        return string(log, len);
 }
 
@@ -101,49 +110,52 @@ void Program::bind()
        if(!linked)
                throw InvalidState("Program is not linked");
 
-       glUseProgram(id);
+       glUseProgramObjectARB(id);
        cur_prog=this;
 }
 
 int Program::get_uniform_location(const string &n) const
 {
-       return glGetUniformLocation(id, n.c_str());
+       return glGetUniformLocationARB(id, n.c_str());
 }
 
 void Program::uniform(int i, int v)
 {
-       glUniform1i(i, v);
+       glUniform1iARB(i, v);
 }
 
 void Program::uniform(int i, float x)
 {
-       glUniform1f(i, x);
+       glUniform1fARB(i, x);
 }
 
 void Program::uniform(int i, float x, float y)
 {
-       glUniform2f(i, x, y);
+       glUniform2fARB(i, x, y);
 }
 
 void Program::uniform(int i, float x, float y, float z)
 {
-       glUniform3f(i, x, y, z);
+       glUniform3fARB(i, x, y, z);
 }
 
 void Program::uniform(int i, float x, float y, float z, float w)
 {
-       glUniform4f(i, x, y, z, w);
+       glUniform4fARB(i, x, y, z, w);
 }
 
 void Program::uniform_matrix4(int i, const float *v)
 {
-       glUniformMatrix4fv(i, 1, false, v);
+       glUniformMatrix4fvARB(i, 1, false, v);
 }
 
 void Program::unbind()
 {
-       glUseProgram(0);
-       cur_prog=0;
+       if(cur_prog)
+       {
+               glUseProgramObjectARB(0);
+               cur_prog=0;
+       }
 }
 
 void Program::maybe_bind()