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view src/audio/qsa/SDL_qsa_audio.h @ 3333:b334b4f7dfa0

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[SDL] Bad math in SDL_RenderCopy Mason Wheeler to sdl When I tried to render an image using something other than NULL for srcrect, it got horribly distorted. I traced it down to the fact that the math in the rectangle adjustments performed just before the call to renderer->RenderCopy is written inside out. It should look like this: if (dstrect->w != real_dstrect.w) { int deltax = (dstrect->x - real_dstrect.x); int deltaw = (dstrect->w - real_dstrect.w); real_srcrect.x += (deltax * real_srcrect.w) / dstrect->w; real_srcrect.w += (deltaw * real_srcrect.w) / dstrect->w; } if (dstrect->h != real_dstrect.h) { int deltay = (dstrect->y - real_dstrect.y); int deltah = (dstrect->h - real_dstrect.h); real_srcrect.y += (deltay * real_srcrect.h) / dstrect->h; real_srcrect.h += (deltah * real_srcrect.h) / dstrect->h;
author Sam Lantinga <slouken@libsdl.org>
date Sat, 03 Oct 2009 16:23:16 +0000
parents 7f684f249ec9
children f7b03b6838cb
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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

    QNX Sound Architecture (QSA) SDL driver
    Copyright (C) 2009 Mike Gorchak
    (mike@malva.ua, lestat@i.com.ua)
*/

#include "SDL_config.h"

#ifndef __SDL_QSA_AUDIO_H__
#define __SDL_QSA_AUDIO_H__

#include <sys/asoundlib.h>

#include "../SDL_sysaudio.h"

/* Hidden "this" pointer for the audio functions */
#define _THIS SDL_AudioDevice* this

struct SDL_PrivateAudioData
{
    /* SDL capture state */
    int iscapture;

    /* The audio device handle */
    int cardno;
    int deviceno;
    snd_pcm_t *audio_handle;

    /* The audio file descriptor */
    int audio_fd;

    /* Select timeout status */
    uint32_t timeout_on_wait;

    /* Raw mixing buffer */
    Uint8 *pcm_buf;
    Uint32 pcm_len;
};

#endif /* __SDL_QSA_AUDIO_H__ */

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