add initial examples, replacing the 'Demos/Demos3'. Will make it work cross-platform, OpenGL3/OpenGL2 and add more examples to it.

examples/OpenGLWindow/LoadShader.cpp

@@ -0,0 +1,111 @@
+#include "LoadShader.h"
+#include "OpenGLInclude.h"
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+// Load the shader from the source text
+void gltLoadShaderSrc(const char *szShaderSrc, GLuint shader)
+{
+	GLchar *fsStringPtr[1];
+
+	fsStringPtr[0] = (GLchar *)szShaderSrc;
+	glShaderSource(shader, 1, (const GLchar **)fsStringPtr, NULL);
+}
+
+
+GLuint gltLoadShaderPair(const char *szVertexProg, const char *szFragmentProg)
+{
+
+  assert(glGetError()==GL_NO_ERROR);
+
+	// Temporary Shader objects
+	GLuint hVertexShader;
+	GLuint hFragmentShader;
+	GLuint hReturn = 0;
+	GLint testVal;
+
+	// Create shader objects
+	hVertexShader = glCreateShader(GL_VERTEX_SHADER);
+	hFragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+
+	gltLoadShaderSrc(szVertexProg, hVertexShader);
+	gltLoadShaderSrc(szFragmentProg, hFragmentShader);
+
+	// Compile them
+	glCompileShader(hVertexShader);
+  assert(glGetError()==GL_NO_ERROR);
+
+	glGetShaderiv(hVertexShader, GL_COMPILE_STATUS, &testVal);
+	if(testVal == GL_FALSE)
+	{
+        char temp[256] = "";
+        glGetShaderInfoLog( hVertexShader, 256, NULL, temp);
+        fprintf( stderr, "Compile failed:\n%s\n", temp);
+        assert(0);
+        return 0;
+		glDeleteShader(hVertexShader);
+		glDeleteShader(hFragmentShader);
+		return (GLuint)NULL;
+	}
+
+  assert(glGetError()==GL_NO_ERROR);
+
+    glCompileShader(hFragmentShader);
+    assert(glGetError()==GL_NO_ERROR);
+
+    glGetShaderiv(hFragmentShader, GL_COMPILE_STATUS, &testVal);
+	if(testVal == GL_FALSE)
+	{
+        char temp[256] = "";
+        glGetShaderInfoLog( hFragmentShader, 256, NULL, temp);
+        fprintf( stderr, "Compile failed:\n%s\n", temp);
+        assert(0);
+        exit(0);
+		glDeleteShader(hVertexShader);
+		glDeleteShader(hFragmentShader);
+		return (GLuint)NULL;
+	}
+
+    assert(glGetError()==GL_NO_ERROR);
+
+	// Check for errors
+
+
+
+
+	// Link them - assuming it works...
+	hReturn = glCreateProgram();
+	glAttachShader(hReturn, hVertexShader);
+	glAttachShader(hReturn, hFragmentShader);
+
+	glLinkProgram(hReturn);
+
+	// These are no longer needed
+	glDeleteShader(hVertexShader);
+	glDeleteShader(hFragmentShader);
+
+	// Make sure link worked too
+	glGetProgramiv(hReturn, GL_LINK_STATUS, &testVal);
+	if(testVal == GL_FALSE)
+	{
+		GLsizei maxLen = 4096;
+		GLchar infoLog[4096];
+		GLsizei actualLen;
+
+		glGetProgramInfoLog(	hReturn,
+								maxLen,
+								 &actualLen,
+								 infoLog);
+
+		printf("Warning/Error in GLSL shader:\n");
+		printf("%s\n",infoLog);
+		glDeleteProgram(hReturn);
+		return (GLuint)NULL;
+	}
+
+	return hReturn;
+}
+
+