cocoaTouch/SDLOverrides/SDL_uikitopengles.m
changeset 2692 ce9992075118
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cocoaTouch/SDLOverrides/SDL_uikitopengles.m	Tue Jan 12 07:32:15 2010 +0000
@@ -0,0 +1,139 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2009 Sam Lantinga
+ 
+ This library 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 2.1 of the License, or (at your option) any later version.
+ 
+ This library 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 library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ 
+ Sam Lantinga
+ slouken@libsdl.org
+ */
+
+#include "SDL_uikitopengles.h"
+#include "SDL_uikitopenglview.h"
+#include "SDL_uikitappdelegate.h"
+#include "SDL_uikitwindow.h"
+#include "jumphack.h"
+#include "SDL_sysvideo.h"
+#include "SDL_loadso.h"
+#include <dlfcn.h>
+
+static int UIKit_GL_Initialize(_THIS);
+
+void *
+UIKit_GL_GetProcAddress(_THIS, const char *proc)
+{	
+	/* Look through all SO's for the proc symbol.  Here's why:
+	   -Looking for the path to the OpenGL Library seems not to work in the iPhone Simulator.
+	   -We don't know that the path won't change in the future.
+	*/
+    return SDL_LoadFunction(RTLD_DEFAULT, proc);
+}
+
+/*
+	note that SDL_GL_Delete context makes it current without passing the window
+*/
+int UIKit_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
+{
+	
+	if (context) {
+		SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
+		[data->view setCurrentContext];
+	}
+	else {
+		[EAGLContext setCurrentContext: nil];
+	}
+		
+    return 0;
+}
+
+int
+UIKit_GL_LoadLibrary(_THIS, const char *path)
+{
+	/* 
+		shouldn't be passing a path into this function 
+		why?  Because we've already loaded the library
+		and because the SDK forbids loading an external SO
+	*/
+    if (path != NULL) {
+		SDL_SetError("iPhone GL Load Library just here for compatibility");
+		return -1;
+    }
+    return 0;
+}
+
+
+void UIKit_GL_SwapWindow(_THIS, SDL_Window * window)
+{
+
+	SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
+	
+	if (nil == data->view) {
+		return;
+	}
+	[data->view swapBuffers];
+	/* since now we've got something to draw
+	   make the window visible */
+	[data->uiwindow makeKeyAndVisible];
+
+	/* we need to let the event cycle run, or the OS won't update the OpenGL view! */
+	SDL_PumpEvents();
+	
+}
+
+SDL_GLContext UIKit_GL_CreateContext(_THIS, SDL_Window * window)
+{
+	
+	SDL_uikitopenglview *view;
+
+	SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
+	
+	/* construct our view, passing in SDL's OpenGL configuration data */
+	view = [[SDL_uikitopenglview alloc] initWithFrame: [[UIScreen mainScreen] applicationFrame] \
+									retainBacking: _this->gl_config.retained_backing \
+									rBits: _this->gl_config.red_size \
+									gBits: _this->gl_config.green_size \
+									bBits: _this->gl_config.blue_size \
+									aBits: _this->gl_config.alpha_size \
+									depthBits: _this->gl_config.depth_size];
+	
+	// add a tag to be able to remove from superview once finished
+	view.tag = 54867;
+	data->view = view;
+	
+	/* add the view to our window */
+	[data->uiwindow addSubview: view ];
+	
+	/* Don't worry, the window retained the view */
+	[view release];
+	
+	if ( UIKit_GL_MakeCurrent(_this, window, view) < 0 ) {
+        UIKit_GL_DeleteContext(_this, view);
+        return NULL;
+    }
+		
+	return view;
+}
+
+void UIKit_GL_DeleteContext(_THIS, SDL_GLContext context)
+{
+	/* the delegate has retained the view, this will release him */
+	SDL_uikitopenglview *view = (SDL_uikitopenglview *)context;
+	/* this will also delete it */
+	[view removeFromSuperview];
+	
+	return;
+}
+
+