view src/video/uikit/SDL_uikitappdelegate.m @ 3485:e77a69aae239

Mason Wheeler to sdl I updated SDL, and suddenly my SDL frames stopped working. They'd "initialize" full of gibberish, and I couldn't render anything to them. After a bit of digging, I found a problem: the renderer initialization routine in my SDL frame code wasn't getting called anymore. procedure TSdlFrame.Paint; begin if SDL_SelectRenderer(FWindowID) = -1 then CreateRenderer; SDL_RenderPresent; end; function TSdlFrame.CreateRenderer: boolean; const pf: tagPIXELFORMATDESCRIPTOR = (nSize: sizeof(pf); nVersion: 1; dwFlags: PFD_DRAW_TO_WINDOW or PFD_SUPPORT_OPENGL or PFD_DOUBLEBUFFER; iPixelType: PFD_TYPE_RGBA; cColorBits: 24; cAlphaBits: 8; iLayerType: PFD_MAIN_PLANE); RENDERERS: array[TRendererType] of AnsiString = ('software', 'gdi', 'opengl', 'd3d'); var pFormat: integer; begin if (SDL_SelectRenderer(FWindowID) = 0) then begin result := true; Exit; end; if FRendererType = rtOpenGL then begin pFormat := ChoosePixelFormat(canvas.Handle, @pf); if not SetPixelFormat(canvas.Handle, pFormat, @pf) then outputDebugString(PChar(SysErrorMessage(GetLastError))); if wglCreateContext(canvas.Handle) = 0 then outputDebugString(PChar(SysErrorMessage(GetLastError))); end; if (SDL_CreateRenderer(FWindowID, SDL_RendererIndex(RENDERERS[FRendererType]), [sdlrPresentFlip3, sdlrAccelerated]) = 0) then begin SDL_ShowWindow(FWindowID); assert(SDL_SetRenderDrawColor(0, 0, 0, 255) = 0); FFlags := SDL_GetWindowFlags(FWindowID); if assigned(FOnAvailable) then FOnAvailable(self); end else outputDebugString(pChar(format('SDL_CreateRenderer failed: %s', [sdl_GetError]))); result := SDL_SelectRenderer(FWindowID) = 0; end; This is a critical issue. The Paint method gets called when the control receives a WM_PAINT message from Windows. I can't create the renderer before then, or it will fail and cause trouble. And when I do create it, it needs to be created with certain parameters. So imagine my surprise when I started debugging into the DLL and found that SDL_SelectRenderer was trying to be "helpful" by creating the renderer for me if it didn't already exist! Now not only does my initialization code not get called, I end up with the wrong renderer and so things don't render as expected when I try to use the window.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 24 Nov 2009 04:48:12 +0000
parents ec4db979dddb
children 64ce267332c6
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/*
 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
*/

#import "SDL_uikitappdelegate.h"
#import "SDL_uikitopenglview.h"
#import "SDL_events_c.h"
#import "jumphack.h"

#ifdef main
#undef main
#endif

extern int SDL_main(int argc, char *argv[]);
static int forward_argc;
static char **forward_argv;

int main(int argc, char **argv) {

	int i;
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	
	/* store arguments */
	forward_argc = argc;
	forward_argv = (char **)malloc(argc * sizeof(char *));
	for (i=0; i<argc; i++) {
		forward_argv[i] = malloc( (strlen(argv[i])+1) * sizeof(char));
		strcpy(forward_argv[i], argv[i]);
	}

	/* Give over control to run loop, SDLUIKitDelegate will handle most things from here */
	UIApplicationMain(argc, argv, NULL, @"SDLUIKitDelegate");
	
	[pool release];
	
}

@implementation SDLUIKitDelegate

@synthesize window;
@synthesize windowID;

/* convenience method */
+(SDLUIKitDelegate *)sharedAppDelegate {
	/* the delegate is set in UIApplicationMain(), which is garaunteed to be called before this method */
	return (SDLUIKitDelegate *)[[UIApplication sharedApplication] delegate];
}

- (id)init {
	self = [super init];
	window = nil;
	windowID = 0;
	return self;
}

- (void)postFinishLaunch {

	/* run the user's application, passing argc and argv */
	int exit_status = SDL_main(forward_argc, forward_argv);
	
	/* free the memory we used to hold copies of argc and argv */
	int i;
	for (i=0; i<forward_argc; i++) {
		free(forward_argv[i]);
	}
	free(forward_argv);	
		
	/* exit, passing the return status from the user's application */
	exit(exit_status);
}

- (void)applicationDidFinishLaunching:(UIApplication *)application {
			
	/* Set working directory to resource path */
	[[NSFileManager defaultManager] changeCurrentDirectoryPath: [[NSBundle mainBundle] resourcePath]];
	
	[self performSelector:@selector(postFinishLaunch) withObject:nil
afterDelay:0.0];
}

- (void)applicationWillTerminate:(UIApplication *)application {
	
	SDL_SendQuit();
	 /* hack to prevent automatic termination.  See SDL_uikitevents.m for details */
	longjmp(*(jump_env()), 1);
	
}

- (void) applicationWillResignActive:(UIApplication*)application
{
//	NSLog(@"%@", NSStringFromSelector(_cmd));
	SDL_SendWindowEvent(self.windowID, SDL_WINDOWEVENT_MINIMIZED, 0, 0);
}

- (void) applicationDidBecomeActive:(UIApplication*)application
{
//	NSLog(@"%@", NSStringFromSelector(_cmd));
	SDL_SendWindowEvent(self.windowID, SDL_WINDOWEVENT_RESTORED, 0, 0);
}



-(void)dealloc {
	[window release];
	[super dealloc];
}

@end