Mercurial > sdl-ios-xcode

view src/video/xbios/SDL_xbios_sb3.c @ 2359:b70b96e615d2 gsoc2008_iphone

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
These files are the OpenGL ES render driver. You should be able to use them on any platform that supports OpenGL ES -- not just iPhone. The driver is based off the OpenGL render driver. There are a few differences between OpenGL and OpenGL ES that present difficulties for this driver: - OpenGL ES does NOT support many pixel formats (for example, no GL_BGR). Also, when using texture functions format and internalFormat must be the same -- this means 32 bit packed formats like SDL_PIXELFORMAT_BGR888 cannot be automatically converted to GL_RGB (which is 24bpp). - OpenGL ES doesn't have GL_PACK_ROW_LENGTH, which means data must be reformatted before uploading changes to dirty rects. This change has been added. - OpenGL ES doesn't support paletted textures, though there is an extension. I'm looking into this. Some other notable differences: - OpenGL ES has an extension called GL_OES_draw_texture which allows for quicker 2D sprite-type drawing. I use this in GL_RenderCopy when it is available. The iPhone supports the extension, but the iPhone Simulator does not (presently). - No glBegin() / glEnd() and no GL_QUADS! I'm using glDrawArrays with GL_TRIANGLE_STRIP instead!
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Thu, 17 Jul 2008 23:31:42 +0000
parents 0e751c1f83f5
children 99210400e8b9
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 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"

/*
	ScreenBlaster 3 functions

	Patrice Mandin
*/

/*--- Includes ---*/

#include "SDL_stdinc.h"
#include "SDL_xbios.h"
#include "SDL_xbios_sb3.h"

/*--- Defines ---*/

const int SDL_XBIOS_scpn_planes_device[] = {
    SCPN_DEV_1BPP,
    SCPN_DEV_4BPP,
    SCPN_DEV_8BPP,
    SCPN_DEV_16BPP,
    SCPN_DEV_2BPP,
    SCPN_DEV_4BPP,
    SCPN_DEV_1BPP
};

/*--- Functions ---*/

int
SDL_XBIOS_SB3Usable(scpn_cookie_t * cookie_scpn)
{
#if 0
    scpn_screeninfo_t *scrinfo;
    int bpp;

    /* Check if current SB3 mode is usable, i.e. 8 or 16bpp */
    scrinfo = cookie_scpn->screen_info;
    bpp = 1 << (SDL_XBIOS_scpn_planes_device[scrinfo->device]);

    if ((bpp == 8) || (bpp == 16)) {
        return 1;
    }
#endif

    return 0;
}

void
SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t * cookie_scpn)
{
#if 0
    scpn_screeninfo_t *scrinfo;

    /* SB3 prevent changing video modes, we can only use current one */
    if (XBIOS_modelist) {
        SDL_free(XBIOS_modelist);
        XBIOS_nummodes = 0;
        XBIOS_modelist = NULL;
    }

    scrinfo = cookie_scpn->screen_info;
    scrinfo->h_pos = scrinfo->v_pos = 0;

    SDL_XBIOS_AddMode(this,
                      -1,
                      scrinfo->virtual_width, scrinfo->virtual_height,
                      1 << (SDL_XBIOS_scpn_planes_device[scrinfo->device]),
                      SDL_FALSE);
#endif
}

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