From a4fa46a4fda967348ea18961c177330491bdb953 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias@gamezock.de>
Date: Tue, 15 Dec 2009 02:25:40 +0100
Subject: Added nice lighting shaders

---
 Shader.cpp | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 Shader.cpp

(limited to 'Shader.cpp')

diff --git a/Shader.cpp b/Shader.cpp
new file mode 100644
index 0000000..420b6c6
--- /dev/null
+++ b/Shader.cpp
@@ -0,0 +1,95 @@
+/*
+ * Shader.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Shader.h"
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <boost/scoped_array.hpp>
+
+namespace Zoom {
+
+bool Shader::loadProgram(const std::string &vertexShader, const std::string &fragmentShader) {
+  GLhandleARB program, vs = 0, fs = 0;
+
+  if(!vertexShader.empty())
+    vs = loadShader(vertexShader, GL_VERTEX_SHADER_ARB);
+
+  if(!fragmentShader.empty())
+    fs = loadShader(fragmentShader, GL_FRAGMENT_SHADER_ARB);
+
+  program = glCreateProgramObjectARB();
+
+  if(vs)
+    glAttachObjectARB(program, vs);
+
+  if(fs)
+    glAttachObjectARB(program, fs);
+
+  glLinkProgramARB(program);
+  printInfoLog(program);
+
+  glUseProgramObjectARB(program);
+
+  return true;
+}
+
+GLhandleARB Shader::loadShader(const std::string &name, GLenum type) {
+  std::vector<std::string> lines;
+  std::ifstream file(("shader/" + name).c_str(), std::ios_base::in);
+  if(!file.good())
+    throw std::ios::failure("Can't read file '" + name + "'");
+
+  while(file.good() && !file.eof()) {
+    std::string line;
+    std::getline(file, line);
+
+    if(!line.empty())
+      lines.push_back(line);
+  }
+
+  boost::scoped_array<const char *> strings(new const char*[lines.size()]);
+  for(std::size_t i = 0; i < lines.size(); ++i) {
+    strings[i] = lines[i].c_str();
+  }
+
+  GLhandleARB shader = glCreateShaderObjectARB(type);
+  glShaderSourceARB(shader, lines.size(), strings.get(), 0);
+  glCompileShaderARB(shader);
+  printInfoLog(shader);
+
+  return shader;
+}
+
+void Shader::printInfoLog(GLhandleARB obj) {
+  int length = 0;
+
+  glGetObjectParameterivARB(obj, GL_OBJECT_INFO_LOG_LENGTH_ARB, &length);
+
+  if(length > 0) {
+    boost::scoped_array<char> log(new char[length]);
+
+    int foo;
+    glGetInfoLogARB(obj, length, &foo, log.get());
+    std::cerr << log.get() << std::endl;
+  }
+}
+
+
+}
-- 
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