Mercurial > sdl-ios-xcode
view include/SDL_platform.h @ 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 | d3baf5ac4e37 |
| children | f7b03b6838cb |
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 */ /** * \file SDL_platform.h * * Try to get a standard set of platform defines. */ #ifndef _SDL_platform_h #define _SDL_platform_h #if defined(_AIX) #undef __AIX__ #define __AIX__ 1 #endif #if defined(__BEOS__) #undef __BEOS__ #define __BEOS__ 1 #endif #if defined(__HAIKU__) #undef __HAIKU__ #define __HAIKU__ 1 #endif #if defined(bsdi) || defined(__bsdi) || defined(__bsdi__) #undef __BSDI__ #define __BSDI__ 1 #endif #if defined(_arch_dreamcast) #undef __DREAMCAST__ #define __DREAMCAST__ 1 #endif #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) #undef __FREEBSD__ #define __FREEBSD__ 1 #endif #if defined(hpux) || defined(__hpux) || defined(__hpux__) #undef __HPUX__ #define __HPUX__ 1 #endif #if defined(sgi) || defined(__sgi) || defined(__sgi__) || defined(_SGI_SOURCE) #undef __IRIX__ #define __IRIX__ 1 #endif #if defined(linux) || defined(__linux) || defined(__linux__) #undef __LINUX__ #define __LINUX__ 1 #endif #if defined(__APPLE__) /* lets us know what version of Mac OS X we're compiling on */ #include "AvailabilityMacros.h" #ifdef MAC_OS_X_VERSION_10_3 #include "TargetConditionals.h" /* this header is in 10.3 or later */ #if TARGET_OS_IPHONE /* if compiling for iPhone */ #undef __IPHONEOS__ #define __IPHONEOS__ 1 #undef __MACOSX__ #else /* if not compiling for iPhone */ #undef __MACOSX__ #define __MACOSX__ 1 #endif /* TARGET_OS_IPHONE */ #else /* if earlier verion of Mac OS X than version 10.3 */ #undef __MACOSX__ #define __MACOSX__ 1 #endif #endif /* defined(__APPLE__) */ #if defined(__NetBSD__) #undef __NETBSD__ #define __NETBSD__ 1 #endif #if defined(__OpenBSD__) #undef __OPENBSD__ #define __OPENBSD__ 1 #endif #if defined(__OS2__) #undef __OS2__ #define __OS2__ 1 #endif #if defined(osf) || defined(__osf) || defined(__osf__) || defined(_OSF_SOURCE) #undef __OSF__ #define __OSF__ 1 #endif #if defined(__QNXNTO__) #undef __QNXNTO__ #define __QNXNTO__ 1 #endif #if defined(riscos) || defined(__riscos) || defined(__riscos__) #undef __RISCOS__ #define __RISCOS__ 1 #endif #if defined(__SVR4) #undef __SOLARIS__ #define __SOLARIS__ 1 #endif #if defined(WIN32) || defined(_WIN32) #undef __WIN32__ #define __WIN32__ 1 #endif #if defined(__NDS__) #undef __NINTENDODS__ #define __NINTENDODS__ 1 #endif #include "begin_code.h" /* Set up for C function definitions, even when using C++ */ #ifdef __cplusplus /* *INDENT-OFF* */ extern "C" { /* *INDENT-ON* */ #endif /** * \brief Gets the name of the platform. */ extern DECLSPEC const char * SDLCALL SDL_GetPlatform (void); /* Ends C function definitions when using C++ */ #ifdef __cplusplus /* *INDENT-OFF* */ } /* *INDENT-ON* */ #endif #include "close_code.h" #endif /* _SDL_platform_h */ /* vi: set ts=4 sw=4 expandtab: */