Mercurial > sdl-ios-xcode
view src/haptic/dummy/SDL_syshaptic.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 | eed1bde05821 |
children |
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line source
/* SDL - Simple DirectMedia Layer Copyright (C) 2008 Edgar Simo 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" #if defined(SDL_HAPTIC_DUMMY) || defined(SDL_HAPTIC_DISABLED) #include "SDL_haptic.h" #include "../SDL_syshaptic.h" static int SDL_SYS_LogicError(void) { SDL_SetError("Logic error: No haptic devices available."); return 0; } int SDL_SYS_HapticInit(void) { return 0; } const char * SDL_SYS_HapticName(int index) { SDL_SYS_LogicError(); return NULL; } int SDL_SYS_HapticOpen(SDL_Haptic * haptic) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticMouse(void) { return -1; } int SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick) { return 0; } int SDL_SYS_HapticOpenFromJoystick(SDL_Haptic * haptic, SDL_Joystick * joystick) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_JoystickSameHaptic(SDL_Haptic * haptic, SDL_Joystick * joystick) { return 0; } void SDL_SYS_HapticClose(SDL_Haptic * haptic) { return; } void SDL_SYS_HapticQuit(void) { return; } int SDL_SYS_HapticNewEffect(SDL_Haptic * haptic, struct haptic_effect *effect, SDL_HapticEffect * base) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticUpdateEffect(SDL_Haptic * haptic, struct haptic_effect *effect, SDL_HapticEffect * data) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticRunEffect(SDL_Haptic * haptic, struct haptic_effect *effect, Uint32 iterations) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticStopEffect(SDL_Haptic * haptic, struct haptic_effect *effect) { SDL_SYS_LogicError(); return -1; } void SDL_SYS_HapticDestroyEffect(SDL_Haptic * haptic, struct haptic_effect *effect) { SDL_SYS_LogicError(); return; } int SDL_SYS_HapticGetEffectStatus(SDL_Haptic * haptic, struct haptic_effect *effect) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticSetGain(SDL_Haptic * haptic, int gain) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticSetAutocenter(SDL_Haptic * haptic, int autocenter) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticPause(SDL_Haptic * haptic) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticUnpause(SDL_Haptic * haptic) { SDL_SYS_LogicError(); return -1; } int SDL_SYS_HapticStopAll(SDL_Haptic * haptic) { SDL_SYS_LogicError(); return -1; } #endif /* SDL_HAPTIC_DUMMY || SDL_HAPTIC_DISABLED */