Generalize VertexBuffer into Buffer with support for other types as well

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

diff --git a/source/program.cpp b/source/program.cpp
index e0a685f15cb70a7bce1013bfcec44b1a725c600b..75f982d7f5dc8fa4c2235af999249cd23cae4146 100644 (file)
--- a/source/program.cpp
+++ b/source/program.cpp
@@ -5,8 +5,11 @@ Copyright © 2007 Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
-#define GL_GLEXT_PROTOTYPES
-#include "error.h"
+#include <algorithm>
+#include "arb_shader_objects.h"
+#include "arb_vertex_shader.h"
+#include "except.h"
+#include "extension.h"
 #include "program.h"
 #include "shader.h"
 
@@ -16,21 +19,29 @@ namespace Msp {
 namespace GL {
 
 Program::Program():
-       id(glCreateProgram()),
-       del_shaders(false),
-       linked(false)
-{ }
+       del_shaders(false)
+{
+       init();
+}
 
 Program::Program(const string &vert, const string &frag):
-       id(glCreateProgram()),
-       del_shaders(true),
-       linked(false)
+       del_shaders(true)
 {
+       init();
+
        attach_shader(*new Shader(VERTEX_SHADER, vert));
        attach_shader(*new Shader(FRAGMENT_SHADER, frag));
        link();
 }
 
+void Program::init()
+{
+       static RequireExtension _ext("GL_ARB_shader_objects");
+
+       linked=false;
+       id=glCreateProgramObjectARB();
+}
+
 Program::~Program()
 {
        if(del_shaders)
@@ -38,14 +49,14 @@ 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 +67,7 @@ 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());
        }
 }
 
@@ -65,26 +76,27 @@ void Program::set_del_shaders(bool ds)
        del_shaders=ds;
 }
 
-void Program::bind_attribute(int index, const string &name)
+void Program::bind_attribute(uint index, const string &name)
 {
-       glBindAttribLocation(id, index, name.c_str());
+       static RequireExtension _ext("GL_ARB_vertex_shader");
+       glBindAttribLocationARB(id, index, name.c_str());
 }
 
-bool Program::link()
+void Program::link()
 {
        for(list<Shader *>::iterator i=shaders.begin(); i!=shaders.end(); ++i)
-               if(!(*i)->get_compiled() && !(*i)->compile())
-                       return false;
+               if(!(*i)->get_compiled())
+                       (*i)->compile();
 
-       glLinkProgram(id);
-       linked=get_param(GL_LINK_STATUS);
-       return linked;
+       glLinkProgramARB(id);
+       if(!(linked=get_param(GL_LINK_STATUS)))
+               throw CompileError(get_info_log());
 }
 
 int Program::get_param(GLenum param) const
 {
        int value;
-       glGetProgramiv(id, param, &value);
+       glGetObjectParameterivARB(id, param, &value);
        return value;
 }
 
@@ -92,58 +104,31 @@ 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);
 }
 
-void Program::bind()
+void Program::bind() const
 {
        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());
-}
-
-void Program::uniform(int i, int v)
-{
-       glUniform1i(i, v);
-}
-
-void Program::uniform(int i, float x)
-{
-       glUniform1f(i, x);
-}
-
-void Program::uniform(int i, float x, float y)
-{
-       glUniform2f(i, x, y);
-}
-
-void Program::uniform(int i, float x, float y, float z)
-{
-       glUniform3f(i, x, y, z);
-}
-
-void Program::uniform(int i, float x, float y, float z, float w)
-{
-       glUniform4f(i, x, y, z, w);
-}
-
-void Program::uniform_matrix4(int i, const float *v)
-{
-       glUniformMatrix4fv(i, 1, false, v);
+       return glGetUniformLocationARB(id, n.c_str());
 }
 
 void Program::unbind()
 {
-       glUseProgram(0);
-       cur_prog=0;
+       if(cur_prog)
+       {
+               glUseProgramObjectARB(0);
+               cur_prog=0;
+       }
 }
 
 void Program::maybe_bind()
@@ -152,7 +137,7 @@ void Program::maybe_bind()
                bind();
 }
 
-Program *Program::cur_prog=0;
+const Program *Program::cur_prog=0;
 
 
 Program::Loader::Loader(Program &p):
@@ -162,11 +147,7 @@ Program::Loader::Loader(Program &p):
 
        add("vertex_shader",   &Loader::vertex_shader);
        add("fragment_shader", &Loader::fragment_shader);
-}
-
-Program::Loader::~Loader()
-{
-       prog.link();
+       add("attribute",       &Loader::attribute);
 }
 
 void Program::Loader::vertex_shader(const string &src)
@@ -179,5 +160,15 @@ void Program::Loader::fragment_shader(const string &src)
        prog.attach_shader(*new Shader(FRAGMENT_SHADER, src));
 }
 
+void Program::Loader::attribute(uint i, const string &n)
+{
+       prog.bind_attribute(i, n);
+}
+
+void Program::Loader::finish()
+{
+       prog.link();
+}
+
 } // namespace GL
 } // namespace Msp