SDL_uikitopengles is responsible for OpenGLES related functions in th…

…e UIKit video driver. The main thing to note is UIKit_GL_CreateContext which creates an instance of the SDL_uikitopenglview class, an OpenGL ES View. Most the real functionality is in SDL_uikitopenglview.
libsdl-org · Jul 17, 2008 · 6083f7e · 6083f7e
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diff --git a/src/video/uikit/SDL_uikitopengles.h b/src/video/uikit/SDL_uikitopengles.h
@@ -0,0 +1,23 @@
+/*
+ *  SDL_uikitopengles.h
+ *  iPodSDL
+ *
+ *  Created by Holmes Futrell on 5/29/08.
+ *  Copyright 2008 __MyCompanyName__. All rights reserved.
+ *
+ */
+
+#include "SDL_config.h"
+
+#ifndef _SDL_uikitopengles
+#define _SDL_uikitopengles
+
+#include "SDL_uikitvideo.h"
+
+extern int UIKit_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context);
+extern void UIKit_GL_SwapWindow(_THIS, SDL_Window * window);
+extern SDL_GLContext UIKit_GL_CreateContext(_THIS, SDL_Window * window);
+extern void UIKit_GL_DeleteContext(_THIS, SDL_GLContext context);
+extern void *UIKit_GL_GetProcAddress(_THIS, const char *proc);
+extern int UIKit_GL_LoadLibrary(_THIS, const char *path);
+#endif
diff --git a/src/video/uikit/SDL_uikitopengles.m b/src/video/uikit/SDL_uikitopengles.m
@@ -0,0 +1,92 @@
+/*
+ *  SDL_uikitopengles.c
+ *  iPodSDL
+ *
+ *  Created by Holmes Futrell on 5/29/08.
+ *  Copyright 2008 __MyCompanyName__. All rights reserved.
+ *
+ */
+
+#include "SDL_uikitopengles.h"
+#include "SDL_uikitopenglview.h"
+#include "jump.h"
+#include "SDL_sysvideo.h"
+#include "SDL_loadso.h"
+#include <dlfcn.h>
+
+extern SDL_uikitopenglview *uikitEAGLView;
+extern UIWindow *uikitWindow;
+
+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);
+}
+
+int UIKit_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
+{
+	[uikitEAGLView setCurrentContext];
+    return 0;
+}
+
+int
+UIKit_GL_LoadLibrary(_THIS, const char *path)
+{
+	/* shouldn't be passing a path into this function */
+    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)
+{
+
+	[uikitEAGLView swapBuffers];
+
+	/* since now we've got something to draw
+	   make the window visible */
+	[uikitWindow 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)
+{
+
+	uikitEAGLView = [[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];
+
+	[uikitWindow addSubview: [uikitEAGLView autorelease]];
+	uikitEAGLView.multipleTouchEnabled = YES;
+
+	if ( UIKit_GL_MakeCurrent(_this, window, NULL) < 0 ) {
+        //Cocoa_GL_DeleteContext(_this, context);
+        return NULL;
+    }
+
+	return [uikitEAGLView context];
+}
+
+void UIKit_GL_DeleteContext(_THIS, SDL_GLContext context)
+{
+
+	return;
+}
+
+