Mercurial > sdl-ios-xcode
view src/video/directfb/SDL_DirectFB_dyn.c @ 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 | d72a0dd80e8b |
children | f7b03b6838cb |
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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" #include "SDL_DirectFB_video.h" #include "SDL_DirectFB_dyn.h" #ifdef SDL_VIDEO_DRIVER_DIRECTFB_DYNAMIC #include "SDL_name.h" #include "SDL_loadso.h" #define DFB_SYM(ret, name, args, al, func) ret (*name) args; static struct _SDL_DirectFB_Symbols { DFB_SYMS const unsigned int *directfb_major_version; const unsigned int *directfb_minor_version; const unsigned int *directfb_micro_version; } SDL_DirectFB_Symbols; #undef DFB_SYM #define DFB_SYM(ret, name, args, al, func) ret name args { func SDL_DirectFB_Symbols.name al ; } DFB_SYMS #undef DFB_SYM static void *handle = NULL; int SDL_DirectFB_LoadLibrary(void) { int retval = 0; if (handle == NULL) { handle = SDL_LoadObject(SDL_VIDEO_DRIVER_DIRECTFB_DYNAMIC); if (handle != NULL) { retval = 1; #define DFB_SYM(ret, name, args, al, func) if (!(SDL_DirectFB_Symbols.name = SDL_LoadFunction(handle, # name))) retval = 0; DFB_SYMS #undef DFB_SYM if (! (SDL_DirectFB_Symbols.directfb_major_version = SDL_LoadFunction(handle, "directfb_major_version"))) retval = 0; if (! (SDL_DirectFB_Symbols.directfb_minor_version = SDL_LoadFunction(handle, "directfb_minor_version"))) retval = 0; if (! (SDL_DirectFB_Symbols.directfb_micro_version = SDL_LoadFunction(handle, "directfb_micro_version"))) retval = 0; } } if (retval) { const char *stemp = DirectFBCheckVersion(DIRECTFB_MAJOR_VERSION, DIRECTFB_MINOR_VERSION, DIRECTFB_MICRO_VERSION); /* Version Check */ if (stemp != NULL) { fprintf(stderr, "DirectFB Lib: Version mismatch. Compiled: %d.%d.%d Library %d.%d.%d\n", DIRECTFB_MAJOR_VERSION, DIRECTFB_MINOR_VERSION, DIRECTFB_MICRO_VERSION, *SDL_DirectFB_Symbols.directfb_major_version, *SDL_DirectFB_Symbols.directfb_minor_version, *SDL_DirectFB_Symbols.directfb_micro_version); retval = 0; } } if (!retval) SDL_DirectFB_UnLoadLibrary(); return retval; } void SDL_DirectFB_UnLoadLibrary(void) { if (handle != NULL) { SDL_UnloadObject(handle); handle = NULL; } } #else int SDL_DirectFB_LoadLibrary(void) { return 1; } void SDL_DirectFB_UnLoadLibrary(void) { } #endif