view src/video/x11/SDL_x11dyn.c @ 2884:9dde605c7540

Date: Fri, 19 Dec 2008 20:17:35 +0100 From: Couriersud Subject: Re: Aw: Experience using SDL1.3 in sdlmame/Proposal for api additions > For consistency you'd probably want: > SDL_SetRenderDrawColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a); > SDL_SetRenderDrawBlendMode(SDL_BlendMode blendMode); > SDL_RenderLine(int x1, int y1, int x2, int y2); > SDL_RenderFill(SDL_Rect *rect); > > You probably also want to add API functions query the current state. > I have implemented the above api for the opengl, x11, directfb and software renderers. I have also renamed *TEXTUREBLENDMODE* constants to BLENDMODE*. The unix build compiles. The windows renderer still needs to be updated, but I have no windows development machine at hand. Have a look at the x11 renderer for a sample. Vector games now run at 90% both on opengl and directfb in comparison to sdlmame's own opengl renderer. The same applies to raster games. The diff also includes a) Changed XDrawRect to XFillRect in x11 renderer b) A number of changes to fix blending and modulation issues in the directfb renderer.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 12:00:00 +0000
parents 99210400e8b9
children 54fac87e1f34
line wrap: on
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 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
*/
#include "SDL_config.h"

#define DEBUG_DYNAMIC_X11 0

#include "SDL_x11dyn.h"

#if DEBUG_DYNAMIC_X11
#include <stdio.h>
#endif

#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC

#include "SDL_name.h"
#include "SDL_loadso.h"

typedef struct
{
    void *lib;
    const char *libname;
} x11dynlib;

#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC
#define SDL_VIDEO_DRIVER_X11_DYNAMIC NULL
#endif
#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT
#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL
#endif
#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER
#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER NULL
#endif
#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR
#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL
#endif
#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT
#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT NULL
#endif

static x11dynlib x11libs[] = {
    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC},
    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT},
    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER},
    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR},
    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT},
};

static void
X11_GetSym(const char *fnname, int *rc, void **fn)
{
    int i;
    for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
        if (x11libs[i].lib != NULL) {
            *fn = SDL_LoadFunction(x11libs[i].lib, fnname);
            if (*fn != NULL)
                break;
        }
    }

#if DEBUG_DYNAMIC_X11
    if (*fn != NULL)
        printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname,
               *fn);
    else
        printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
#endif

    if (*fn == NULL)
        *rc = 0;                /* kill this module. */
}


/* Define all the function pointers and wrappers... */
#define SDL_X11_MODULE(modname)
#define SDL_X11_SYM(rc,fn,params,args,ret) \
	static rc (*p##fn) params = NULL; \
	rc fn params { ret p##fn args ; }
#include "SDL_x11sym.h"
#undef SDL_X11_MODULE
#undef SDL_X11_SYM
#endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */

/* Annoying varargs entry point... */
#ifdef X_HAVE_UTF8_STRING
XIC(*pXCreateIC) (XIM,...) = NULL;
char *(*pXGetICValues) (XIC, ...) = NULL;
#endif

/* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */
#define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 1;
#define SDL_X11_SYM(rc,fn,params,args,ret)
#include "SDL_x11sym.h"
#undef SDL_X11_MODULE
#undef SDL_X11_SYM


static int x11_load_refcount = 0;

void
SDL_X11_UnloadSymbols(void)
{
#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
    /* Don't actually unload if more than one module is using the libs... */
    if (x11_load_refcount > 0) {
        if (--x11_load_refcount == 0) {
            int i;

            /* set all the function pointers to NULL. */
#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1;
#define SDL_X11_SYM(rc,fn,params,args,ret) p##fn = NULL;
#include "SDL_x11sym.h"
#undef SDL_X11_MODULE
#undef SDL_X11_SYM

#ifdef X_HAVE_UTF8_STRING
            pXCreateIC = NULL;
            pXGetICValues = NULL;
#endif

            for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
                if (x11libs[i].lib != NULL) {
                    SDL_UnloadObject(x11libs[i].lib);
                    x11libs[i].lib = NULL;
                }
            }
        }
    }
#endif
}

/* returns non-zero if all needed symbols were loaded. */
int
SDL_X11_LoadSymbols(void)
{
    int rc = 1;                 /* always succeed if not using Dynamic X11 stuff. */

#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
    /* deal with multiple modules (dga, x11, etc) needing these symbols... */
    if (x11_load_refcount++ == 0) {
        int i;
        int *thismod = NULL;
        for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
            if (x11libs[i].libname != NULL) {
                x11libs[i].lib = SDL_LoadObject(x11libs[i].libname);
            }
        }
#define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname;
#define SDL_X11_SYM(a,fn,x,y,z) X11_GetSym(#fn,thismod,(void**)&p##fn);
#include "SDL_x11sym.h"
#undef SDL_X11_MODULE
#undef SDL_X11_SYM

#ifdef X_HAVE_UTF8_STRING
        X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8, (void **) &pXCreateIC);
        X11_GetSym("XGetICValues", &SDL_X11_HAVE_UTF8,
                   (void **) &pXGetICValues);
#endif

        if (SDL_X11_HAVE_BASEXLIB) {
            /* all required symbols loaded. */
            SDL_ClearError();
        } else {
            /* in case something got loaded... */
            SDL_X11_UnloadSymbols();
            rc = 0;
        }
    }
#else
#ifdef X_HAVE_UTF8_STRING
    pXCreateIC = XCreateIC;
    pXGetICValues = XGetICValues;
#endif
#endif

    return rc;
}

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