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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 4b1f10cfd304
children e829b6098435
line wrap: on
line source

/*
    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_config.h"

#ifndef _SDL_cocoawindow_h
#define _SDL_cocoawindow_h

#import <Cocoa/Cocoa.h>

typedef struct SDL_WindowData SDL_WindowData;

/* *INDENT-OFF* */
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
@interface Cocoa_WindowListener : NSResponder <NSWindowDelegate> {
#else
@interface Cocoa_WindowListener : NSResponder {
#endif		
    SDL_WindowData *_data;
}

-(void) listen:(SDL_WindowData *) data;
-(void) close;

/* Window delegate functionality */
-(BOOL) windowShouldClose:(id) sender;
-(void) windowDidExpose:(NSNotification *) aNotification;
-(void) windowDidMove:(NSNotification *) aNotification;
-(void) windowDidResize:(NSNotification *) aNotification;
-(void) windowDidMiniaturize:(NSNotification *) aNotification;
-(void) windowDidDeminiaturize:(NSNotification *) aNotification;
-(void) windowDidBecomeKey:(NSNotification *) aNotification;
-(void) windowDidResignKey:(NSNotification *) aNotification;
-(void) windowDidHide:(NSNotification *) aNotification;
-(void) windowDidUnhide:(NSNotification *) aNotification;

/* Window event handling */
-(void) mouseDown:(NSEvent *) theEvent;
-(void) rightMouseDown:(NSEvent *) theEvent;
-(void) otherMouseDown:(NSEvent *) theEvent;
-(void) mouseUp:(NSEvent *) theEvent;
-(void) rightMouseUp:(NSEvent *) theEvent;
-(void) otherMouseUp:(NSEvent *) theEvent;
-(void) mouseMoved:(NSEvent *) theEvent;
-(void) mouseDragged:(NSEvent *) theEvent;
-(void) rightMouseDragged:(NSEvent *) theEvent;
-(void) otherMouseDragged:(NSEvent *) theEvent;
-(void) scrollWheel:(NSEvent *) theEvent;
@end
/* *INDENT-ON* */

struct SDL_WindowData
{
    SDL_WindowID windowID;
    NSWindow *window;
    SDL_bool created;
    Cocoa_WindowListener *listener;
    struct SDL_VideoData *videodata;
};

extern int Cocoa_CreateWindow(_THIS, SDL_Window * window);
extern int Cocoa_CreateWindowFrom(_THIS, SDL_Window * window,
                                  const void *data);
extern void Cocoa_SetWindowTitle(_THIS, SDL_Window * window);
extern void Cocoa_SetWindowPosition(_THIS, SDL_Window * window);
extern void Cocoa_SetWindowSize(_THIS, SDL_Window * window);
extern void Cocoa_ShowWindow(_THIS, SDL_Window * window);
extern void Cocoa_HideWindow(_THIS, SDL_Window * window);
extern void Cocoa_RaiseWindow(_THIS, SDL_Window * window);
extern void Cocoa_MaximizeWindow(_THIS, SDL_Window * window);
extern void Cocoa_MinimizeWindow(_THIS, SDL_Window * window);
extern void Cocoa_RestoreWindow(_THIS, SDL_Window * window);
extern void Cocoa_SetWindowGrab(_THIS, SDL_Window * window);
extern void Cocoa_DestroyWindow(_THIS, SDL_Window * window);
extern SDL_bool Cocoa_GetWindowWMInfo(_THIS, SDL_Window * window,
                                      struct SDL_SysWMinfo *info);

#endif /* _SDL_cocoawindow_h */

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