From d5c33850b3cef417384e8648518e95b6c04b849c Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Tue, 9 Feb 2010 19:49:35 +0100
Subject: Replaced GLUT with SDL.

---
 foo.cpp | 68 +++++++++++++++++++++++++++++++++++++++++------------------------
 1 file changed, 43 insertions(+), 25 deletions(-)

(limited to 'foo.cpp')

diff --git a/foo.cpp b/foo.cpp
index e6354ba..3726b75 100755
--- a/foo.cpp
+++ b/foo.cpp
@@ -1,15 +1,11 @@
-#ifndef __APPLE__
-#include <GL/gl.h>
-#include <GL/glut.h>
-#else
-#include <OpenGL/gl.h>
-#include <GLUT/glut.h>
-#endif
 #include <AR/gsub_lite.h>
 #include <AR/video.h>
 #include <AR/param.h>
 #include <AR/ar.h>
 
+#include <SDL/SDL.h>
+#include <SDL/SDL_opengl.h>
+
 #include <stdexcept>
 #include <iostream>
 
@@ -74,15 +70,7 @@ ARParam cparam;
 
 ARGL_CONTEXT_SETTINGS_REF argl_ctx;
 
-static void key_event(unsigned char key, int x, int y);
-static void main_loop(void);
-
-static void display_func(void) {
-	glutKeyboardFunc(key_event);
-	glutDisplayFunc(main_loop);
-	glutIdleFunc(main_loop);
-}
-
+SDL_Surface *surface;
 
 static void init() {
 	ARParam  wparam;
@@ -110,11 +98,36 @@ static void init() {
 	std::cout << "*** Camera Parameters ***" << std::endl;
 	arParamDisp(&cparam);
 	
-	// Open the graphics window.
-	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH | GLUT_STENCIL);
-	glutInitWindowPosition(0, 0);
-	glutInitWindowSize(1280, 1024);
-	glutCreateWindow("");
+	// Initialize SDL
+	if(SDL_Init(SDL_INIT_VIDEO)) {
+		throw(std::runtime_error("SDL initialization failed"));
+	}
+	// Fetch the video info
+	const SDL_VideoInfo *info = SDL_GetVideoInfo();
+	if(!info) {
+		throw(std::runtime_error("SDL info query failed"));
+	}
+	// The SDL mode-flags
+	int flags = SDL_OPENGL;       // OpenGL in SDL
+	flags |= SDL_GL_DOUBLEBUFFER; // Double buffering
+	flags |= SDL_HWPALETTE;       // Hardware palette
+	// Check for hardware surface aviability
+	if(info->hw_available) {
+		flags |= SDL_HWSURFACE;
+	} else {
+		flags |= SDL_SWSURFACE;
+	}
+	// Check for hardware blit ability
+	if(info->blit_hw) {
+		flags |= SDL_HWACCEL;
+	}
+	// Setup double buffering
+	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+	// Get our surface
+	surface = SDL_SetVideoMode(xsize, ysize, 32, flags);
+	if(!surface) {
+		throw(std::runtime_error("Video mode set failed"));
+	}
 	
 	argl_ctx = arglSetupForCurrentContext();
 	
@@ -181,17 +194,22 @@ static void main_loop(void) {
 	glDisable( GL_DEPTH_TEST );
 	
 	arVideoCapNext();
-	glutSwapBuffers();
+	SDL_GL_SwapBuffers();
 }
 
 int main(int argc, char **argv) {
 	try {
-		glutInit(&argc, argv);
 		init();
 		patt = new Pattern();
 		arVideoCapStart();
-		glutDisplayFunc(display_func);
-		glutMainLoop();
+		while(1) {
+			SDL_Event event;
+			SDL_PollEvent(&event);
+			if(event.type == SDL_QUIT) {
+				break;
+			}
+			main_loop();
+		}
 	} catch(std::runtime_error e) {
 		cleanup();
 		std::cerr << "Exception caught: " << e.what() << std::endl;
-- 
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