Create gl_interop.h

gl_interop.h

@@ -0,0 +1,72 @@
+#include <GL\glew.h>
+#include <GL\glut.h>
+#include <CL\cl.hpp>
+
+//#define GL_SHARING_EXTENSION "cl_khr_gl_sharing"
+
+const int window_width = 1280;
+const int window_height = 720;
+
+// OpenGL vertex buffer object
+GLuint vbo;
+
+void render();
+
+void initGL(int argc, char** argv){
+	// init GLUT for OpenGL viewport
+	glutInit(&argc, argv);
+	// specify the display mode to be RGB and single buffering
+	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
+	// specify the initial window position
+	glutInitWindowPosition(50, 50);
+	// specify the initial window size
+	glutInitWindowSize(window_width, window_height);
+	// create the window and set title
+	glutCreateWindow("Basic OpenCL path tracer");
+
+	// register GLUT callback function to display graphics:
+	glutDisplayFunc(render);
+
+	// initialise OpenGL extensions
+	glewInit();
+
+	// initialise OpenGL
+	glClearColor(0.0, 0.0, 0.0, 1.0);
+	glMatrixMode(GL_PROJECTION);
+	gluOrtho2D(0.0, window_width, 0.0, window_height);
+}
+
+void createVBO(GLuint* vbo)
+{
+	//create vertex buffer object
+	glGenBuffers(1, vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, *vbo);
+
+	//initialise VBO
+	unsigned int size = window_width * window_height * sizeof(cl_float3);
+	glBufferData(GL_ARRAY_BUFFER, size, 0, GL_DYNAMIC_DRAW);
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
+}
+
+void drawGL(){
+
+	//clear all pixels, then render from the vbo
+	glClear(GL_COLOR_BUFFER_BIT);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glVertexPointer(2, GL_FLOAT, 16, 0); // size (2, 3 or 4), type, stride, pointer
+	glColorPointer(4, GL_UNSIGNED_BYTE, 16, (GLvoid*)8); // size (3 or 4), type, stride, pointer
+
+	glEnableClientState(GL_VERTEX_ARRAY);
+	glEnableClientState(GL_COLOR_ARRAY);
+	glDrawArrays(GL_POINTS, 0, window_width * window_height);
+	glDisableClientState(GL_COLOR_ARRAY);
+	glDisableClientState(GL_VERTEX_ARRAY);
+
+	// flip backbuffer to screen
+	glutSwapBuffers();
+}
+
+void Timer(int value) {
+	glutPostRedisplay();
+	glutTimerFunc(15, Timer, 0);
+}