Mercurial > sdl-ios-xcode
view include/begin_code.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 | 276a6474a449 |
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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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ /** * \file begin_code.h * * This file sets things up for C dynamic library function definitions, * static inlined functions, and structures aligned at 4-byte alignment. * If you don't like ugly C preprocessor code, don't look at this file. :) */ /* This shouldn't be nested -- included it around code only. */ #ifdef _begin_code_h #error Nested inclusion of begin_code.h #endif #define _begin_code_h /* Some compilers use a special export keyword */ #ifndef DECLSPEC # if defined(__BEOS__) || defined(__HAIKU__) # if defined(__GNUC__) # define DECLSPEC __declspec(dllexport) # else # define DECLSPEC __declspec(export) # endif # elif defined(__WIN32__) # ifdef __BORLANDC__ # ifdef BUILD_SDL # define DECLSPEC # else # define DECLSPEC __declspec(dllimport) # endif # else # define DECLSPEC __declspec(dllexport) # endif # else # if defined(__GNUC__) && __GNUC__ >= 4 # define DECLSPEC __attribute__ ((visibility("default"))) # else # define DECLSPEC # endif # endif #endif /* By default SDL uses the C calling convention */ #ifndef SDLCALL #if defined(__WIN32__) && !defined(__GNUC__) #define SDLCALL __cdecl #else #define SDLCALL #endif #endif /* SDLCALL */ /* Removed DECLSPEC on Symbian OS because SDL cannot be a DLL in EPOC */ #ifdef __SYMBIAN32__ #undef DECLSPEC #define DECLSPEC #endif /* __SYMBIAN32__ */ /* Force structure packing at 4 byte alignment. This is necessary if the header is included in code which has structure packing set to an alternate value, say for loading structures from disk. The packing is reset to the previous value in close_code.h */ #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__) #ifdef _MSC_VER #pragma warning(disable: 4103) #endif #ifdef __BORLANDC__ #pragma nopackwarning #endif #pragma pack(push,4) #endif /* Compiler needs structure packing set */ /* Set up compiler-specific options for inlining functions */ #ifndef SDL_INLINE_OKAY #ifdef __GNUC__ #define SDL_INLINE_OKAY #else /* Add any special compiler-specific cases here */ #if defined(_MSC_VER) || defined(__BORLANDC__) || \ defined(__DMC__) || defined(__SC__) || \ defined(__WATCOMC__) || defined(__LCC__) || \ defined(__DECC) #ifndef __inline__ #define __inline__ __inline #endif #define SDL_INLINE_OKAY #else #if !defined(__MRC__) && !defined(_SGI_SOURCE) #ifndef __inline__ #define __inline__ inline #endif #define SDL_INLINE_OKAY #endif /* Not a funky compiler */ #endif /* Visual C++ */ #endif /* GNU C */ #endif /* SDL_INLINE_OKAY */ /* If inlining isn't supported, remove "__inline__", turning static inlined functions into static functions (resulting in code bloat in all files which include the offending header files) */ #ifndef SDL_INLINE_OKAY #define __inline__ #endif /* Apparently this is needed by several Windows compilers */ #if !defined(__MACH__) #ifndef NULL #ifdef __cplusplus #define NULL 0 #else #define NULL ((void *)0) #endif #endif /* NULL */ #endif /* ! Mac OS X - breaks precompiled headers */