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
line wrap: on
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/*
    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 */