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Fixed bug #1011 Daniel Ellis 2010-06-25 15:20:31 PDT SDL based applications sometimes display the wrong application name in the Sound Preferences dialog when using pulseaudio. I can see from the code that the SDL pulse module is initiating a new pulse audio context and passing an application name using the function get_progname(). The get_progname() function returns the name of the current process. However, the process name is often not a suitable name to use. For example, the OpenShot video editor is a python application, and so "python" is displayed in the Sound Preferences window (see Bug #596504), when it should be displaying "OpenShot". PulseAudio allows applications to specify the application name, either at the time the context is created (as SDL does currently), or by special environment variables (see http://www.pulseaudio.org/wiki/ApplicationProperties). If no name is specified, then pulseaudio will determine the name based on the process. If you specify the application name when initiating the pulseaudio context, then that will override any application name specified using an environment variable. As libsdl is a library, I believe the solution is for libsdl to not specify any application name when initiating a pulseaudio context, which will enable applications to specify the application name using environment variables. In the case that the applications do not specify anything, pulseaudio will fall back to using the process name anyway. The attached patch removes the get_progname() function and passes NULL as the application name when creating the pulseaudio context, which fixes the issue.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 23 Jan 2011 21:55:04 -0800
parents f7b03b6838cb
children b530ef003506
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2010 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_video.h"
#include "SDL_blit.h"
#include "SDL_sysvideo.h"
#include "SDL_endian.h"

/* Functions to blit from 8-bit surfaces to other surfaces */

static void
Blit1to1(SDL_BlitInfo * info)
{
#ifndef USE_DUFFS_LOOP
    int c;
#endif
    int width, height;
    Uint8 *src, *map, *dst;
    int srcskip, dstskip;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = info->dst;
    dstskip = info->dst_skip;
    map = info->table;

    while (height--) {
#ifdef USE_DUFFS_LOOP
        /* *INDENT-OFF* */
		DUFFS_LOOP(
			{
			  *dst = map[*src];
			}
			dst++;
			src++;
		, width);
        /* *INDENT-ON* */
#else
        for (c = width; c; --c) {
            *dst = map[*src];
            dst++;
            src++;
        }
#endif
        src += srcskip;
        dst += dstskip;
    }
}

/* This is now endian dependent */
#if ( SDL_BYTEORDER == SDL_LIL_ENDIAN )
#define HI	1
#define LO	0
#else /* ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) */
#define HI	0
#define LO	1
#endif
static void
Blit1to2(SDL_BlitInfo * info)
{
#ifndef USE_DUFFS_LOOP
    int c;
#endif
    int width, height;
    Uint8 *src, *dst;
    Uint16 *map;
    int srcskip, dstskip;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = info->dst;
    dstskip = info->dst_skip;
    map = (Uint16 *) info->table;

#ifdef USE_DUFFS_LOOP
    while (height--) {
		/* *INDENT-OFF* */
		DUFFS_LOOP(
		{
			*(Uint16 *)dst = map[*src++];
			dst += 2;
		},
		width);
		/* *INDENT-ON* */
        src += srcskip;
        dst += dstskip;
    }
#else
    /* Memory align at 4-byte boundary, if necessary */
    if ((long) dst & 0x03) {
        /* Don't do anything if width is 0 */
        if (width == 0) {
            return;
        }
        --width;

        while (height--) {
            /* Perform copy alignment */
            *(Uint16 *) dst = map[*src++];
            dst += 2;

            /* Copy in 4 pixel chunks */
            for (c = width / 4; c; --c) {
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
                src += 2;
                dst += 4;
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
                src += 2;
                dst += 4;
            }
            /* Get any leftovers */
            switch (width & 3) {
            case 3:
                *(Uint16 *) dst = map[*src++];
                dst += 2;
            case 2:
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
                src += 2;
                dst += 4;
                break;
            case 1:
                *(Uint16 *) dst = map[*src++];
                dst += 2;
                break;
            }
            src += srcskip;
            dst += dstskip;
        }
    } else {
        while (height--) {
            /* Copy in 4 pixel chunks */
            for (c = width / 4; c; --c) {
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
                src += 2;
                dst += 4;
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
                src += 2;
                dst += 4;
            }
            /* Get any leftovers */
            switch (width & 3) {
            case 3:
                *(Uint16 *) dst = map[*src++];
                dst += 2;
            case 2:
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
                src += 2;
                dst += 4;
                break;
            case 1:
                *(Uint16 *) dst = map[*src++];
                dst += 2;
                break;
            }
            src += srcskip;
            dst += dstskip;
        }
    }
#endif /* USE_DUFFS_LOOP */
}

static void
Blit1to3(SDL_BlitInfo * info)
{
#ifndef USE_DUFFS_LOOP
    int c;
#endif
    int o;
    int width, height;
    Uint8 *src, *map, *dst;
    int srcskip, dstskip;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = info->dst;
    dstskip = info->dst_skip;
    map = info->table;

    while (height--) {
#ifdef USE_DUFFS_LOOP
		/* *INDENT-OFF* */
		DUFFS_LOOP(
			{
				o = *src * 4;
				dst[0] = map[o++];
				dst[1] = map[o++];
				dst[2] = map[o++];
			}
			src++;
			dst += 3;
		, width);
		/* *INDENT-ON* */
#else
        for (c = width; c; --c) {
            o = *src * 4;
            dst[0] = map[o++];
            dst[1] = map[o++];
            dst[2] = map[o++];
            src++;
            dst += 3;
        }
#endif /* USE_DUFFS_LOOP */
        src += srcskip;
        dst += dstskip;
    }
}

static void
Blit1to4(SDL_BlitInfo * info)
{
#ifndef USE_DUFFS_LOOP
    int c;
#endif
    int width, height;
    Uint8 *src;
    Uint32 *map, *dst;
    int srcskip, dstskip;

    /* Set up some basic variables */
    width = info->dst_w;
    height = info->dst_h;
    src = info->src;
    srcskip = info->src_skip;
    dst = (Uint32 *) info->dst;
    dstskip = info->dst_skip / 4;
    map = (Uint32 *) info->table;

    while (height--) {
#ifdef USE_DUFFS_LOOP
		/* *INDENT-OFF* */
		DUFFS_LOOP(
			*dst++ = map[*src++];
		, width);
		/* *INDENT-ON* */
#else
        for (c = width / 4; c; --c) {
            *dst++ = map[*src++];
            *dst++ = map[*src++];
            *dst++ = map[*src++];
            *dst++ = map[*src++];
        }
        switch (width & 3) {
        case 3:
            *dst++ = map[*src++];
        case 2:
            *dst++ = map[*src++];
        case 1:
            *dst++ = map[*src++];
        }
#endif /* USE_DUFFS_LOOP */
        src += srcskip;
        dst += dstskip;
    }
}

static void
Blit1to1Key(SDL_BlitInfo * info)
{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    int srcskip = info->src_skip;
    Uint8 *dst = info->dst;
    int dstskip = info->dst_skip;
    Uint8 *palmap = info->table;
    Uint32 ckey = info->colorkey;

    if (palmap) {
        while (height--) {
			/* *INDENT-OFF* */
			DUFFS_LOOP(
			{
				if ( *src != ckey ) {
				  *dst = palmap[*src];
				}
				dst++;
				src++;
			},
			width);
			/* *INDENT-ON* */
            src += srcskip;
            dst += dstskip;
        }
    } else {
        while (height--) {
			/* *INDENT-OFF* */
			DUFFS_LOOP(
			{
				if ( *src != ckey ) {
				  *dst = *src;
				}
				dst++;
				src++;
			},
			width);
			/* *INDENT-ON* */
            src += srcskip;
            dst += dstskip;
        }
    }
}

static void
Blit1to2Key(SDL_BlitInfo * info)
{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    int srcskip = info->src_skip;
    Uint16 *dstp = (Uint16 *) info->dst;
    int dstskip = info->dst_skip;
    Uint16 *palmap = (Uint16 *) info->table;
    Uint32 ckey = info->colorkey;

    /* Set up some basic variables */
    dstskip /= 2;

    while (height--) {
		/* *INDENT-OFF* */
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
				*dstp=palmap[*src];
			}
			src++;
			dstp++;
		},
		width);
		/* *INDENT-ON* */
        src += srcskip;
        dstp += dstskip;
    }
}

static void
Blit1to3Key(SDL_BlitInfo * info)
{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    int srcskip = info->src_skip;
    Uint8 *dst = info->dst;
    int dstskip = info->dst_skip;
    Uint8 *palmap = info->table;
    Uint32 ckey = info->colorkey;
    int o;

    while (height--) {
		/* *INDENT-OFF* */
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
				o = *src * 4;
				dst[0] = palmap[o++];
				dst[1] = palmap[o++];
				dst[2] = palmap[o++];
			}
			src++;
			dst += 3;
		},
		width);
		/* *INDENT-ON* */
        src += srcskip;
        dst += dstskip;
    }
}

static void
Blit1to4Key(SDL_BlitInfo * info)
{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    int srcskip = info->src_skip;
    Uint32 *dstp = (Uint32 *) info->dst;
    int dstskip = info->dst_skip;
    Uint32 *palmap = (Uint32 *) info->table;
    Uint32 ckey = info->colorkey;

    /* Set up some basic variables */
    dstskip /= 4;

    while (height--) {
		/* *INDENT-OFF* */
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
				*dstp = palmap[*src];
			}
			src++;
			dstp++;
		},
		width);
		/* *INDENT-ON* */
        src += srcskip;
        dstp += dstskip;
    }
}

static void
Blit1toNAlpha(SDL_BlitInfo * info)
{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    int srcskip = info->src_skip;
    Uint8 *dst = info->dst;
    int dstskip = info->dst_skip;
    SDL_PixelFormat *dstfmt = info->dst_fmt;
    const SDL_Color *srcpal = info->src_fmt->palette->colors;
    int dstbpp;
    const int A = info->a;

    /* Set up some basic variables */
    dstbpp = dstfmt->BytesPerPixel;

    while (height--) {
        int sR, sG, sB;
        int dR, dG, dB;
	    	/* *INDENT-OFF* */
	    	DUFFS_LOOP4(
			{
			        Uint32 pixel;
				sR = srcpal[*src].r;
				sG = srcpal[*src].g;
				sB = srcpal[*src].b;
				DISEMBLE_RGB(dst, dstbpp, dstfmt,
					     pixel, dR, dG, dB);
				ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
			  	ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB);
				src++;
				dst += dstbpp;
			},
			width);
	    	/* *INDENT-ON* */
        src += srcskip;
        dst += dstskip;
    }
}

static void
Blit1toNAlphaKey(SDL_BlitInfo * info)
{
    int width = info->dst_w;
    int height = info->dst_h;
    Uint8 *src = info->src;
    int srcskip = info->src_skip;
    Uint8 *dst = info->dst;
    int dstskip = info->dst_skip;
    SDL_PixelFormat *srcfmt = info->src_fmt;
    SDL_PixelFormat *dstfmt = info->dst_fmt;
    const SDL_Color *srcpal = info->src_fmt->palette->colors;
    Uint32 ckey = info->colorkey;
    int dstbpp;
    const int A = info->a;

    /* Set up some basic variables */
    dstbpp = dstfmt->BytesPerPixel;

    while (height--) {
        int sR, sG, sB;
        int dR, dG, dB;
		/* *INDENT-OFF* */
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
			        Uint32 pixel;
				sR = srcpal[*src].r;
				sG = srcpal[*src].g;
				sB = srcpal[*src].b;
				DISEMBLE_RGB(dst, dstbpp, dstfmt,
							pixel, dR, dG, dB);
				ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
			  	ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB);
			}
			src++;
			dst += dstbpp;
		},
		width);
		/* *INDENT-ON* */
        src += srcskip;
        dst += dstskip;
    }
}

static const SDL_BlitFunc one_blit[] = {
    NULL, Blit1to1, Blit1to2, Blit1to3, Blit1to4
};

static const SDL_BlitFunc one_blitkey[] = {
    NULL, Blit1to1Key, Blit1to2Key, Blit1to3Key, Blit1to4Key
};

SDL_BlitFunc
SDL_CalculateBlit1(SDL_Surface * surface)
{
    int which;
    SDL_PixelFormat *dstfmt;

    dstfmt = surface->map->dst->format;
    if (dstfmt->BitsPerPixel < 8) {
        which = 0;
    } else {
        which = dstfmt->BytesPerPixel;
    }
    switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) {
    case 0:
        return one_blit[which];

    case SDL_COPY_COLORKEY:
        return one_blitkey[which];

    case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
        /* Supporting 8bpp->8bpp alpha is doable but requires lots of
           tables which consume space and takes time to precompute,
           so is better left to the user */
        return which >= 2 ? Blit1toNAlpha : NULL;

    case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
        return which >= 2 ? Blit1toNAlphaKey : NULL;
    }
    return NULL;
}

/* vi: set ts=4 sw=4 expandtab: */