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changeset 2670:6e4669f4db49 gsoc2008_nds

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Fix for the previous commit: actually 'svn add'ed some files.
author Darren Alton <dalton@stevens.edu>
date Tue, 10 Jun 2008 06:57:57 +0000
parents e27bdcc80744
children c3e7c0698cbb
files Makefile.ds include/SDL_config_nintendods.h src/joystick/nds/SDL_sysjoystick.c src/thread/nds/SDL_syscond.c src/thread/nds/SDL_syscond_c.h src/thread/nds/SDL_sysmutex.c src/thread/nds/SDL_sysmutex_c.h src/thread/nds/SDL_syssem.c src/thread/nds/SDL_syssem_c.h src/thread/nds/SDL_systhread.c src/thread/nds/SDL_systhread_c.h src/video/nds/SDL_ndsevents.c src/video/nds/SDL_ndsevents_c.h src/video/nds/SDL_ndsrender.c src/video/nds/SDL_ndsrender_c.h src/video/nds/SDL_ndsvideo.c src/video/nds/SDL_ndsvideo.h
diffstat 17 files changed, 1742 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Makefile.ds	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,139 @@
+
+#LibSDL 1.3 porting and enhancements by Darren Alton (lifning)
+#LibSDL 1.2.9 DS porting by Troy Davis(GPF)
+
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM)
+endif
+
+CC = arm-eabi-gcc
+AR = arm-eabi-ar
+RANLIB = arm-eabi-ranlib
+
+#ifdef GL
+#DEFS += -DSDL_VIDEO_OPENGL=1
+#TARGET = libSDL_gl.a
+#else
+TARGET = libSDL.a
+#endif
+
+#CFLAGS=$(DEFS) -Iinclude
+CFLAGS	=	-mthumb -mthumb-interwork \
+		-march=armv5te -mtune=arm946e-s \
+		-O2 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+		-DARM9 -D__NDS__ -I$(DEVKITPRO)/libnds/include -DENABLE_NDS -DNO_SIGNAL_H -DDISABLE_THREADS -DPACKAGE=\"SDL\" -DVERSION=\"1.3\" -DHAVE_ALLOCA_H=1 -DHAVE_ALLOCA=1 \
+		-Iinclude -Isrc -Isrc/audio -Isrc/cdrom -Isrc/endian -Isrc/events -Isrc/joystick -Isrc/thread/nds -Isrc/thread -Isrc/timer -Isrc/video
+
+SRCS = \
+src/SDL.c \
+src/SDL_compat.c \
+src/SDL_error.c \
+src/SDL_fatal.c \
+src/audio/disk/SDL_diskaudio.c \
+src/audio/dummy/SDL_dummyaudio.c \
+src/audio/SDL_audio.c \
+src/audio/SDL_audiocvt.c \
+src/audio/SDL_audiodev.c \
+src/audio/SDL_audiotypecvt.c \
+src/audio/SDL_mixer.c \
+src/audio/SDL_mixer_m68k.c \
+src/audio/SDL_mixer_MMX.c \
+src/audio/SDL_mixer_MMX_VC.c \
+src/audio/SDL_wave.c \
+src/cdrom/dummy/SDL_syscdrom.c \
+src/cdrom/SDL_cdrom.c \
+src/cpuinfo/SDL_cpuinfo.c \
+src/events/SDL_events.c \
+src/events/SDL_keyboard.c \
+src/events/SDL_mouse.c \
+src/events/SDL_quit.c \
+src/events/SDL_windowevents.c \
+src/file/SDL_rwops.c \
+src/joystick/dummy/SDL_sysjoystick.c \
+src/joystick/SDL_joystick.c \
+src/stdlib/SDL_getenv.c \
+src/stdlib/SDL_iconv.c \
+src/stdlib/SDL_malloc.c \
+src/stdlib/SDL_qsort.c \
+src/stdlib/SDL_stdlib.c \
+src/stdlib/SDL_string.c \
+src/thread/SDL_thread.c \
+src/thread/nds/SDL_syscond.c \
+src/thread/nds/SDL_sysmutex.c \
+src/thread/nds/SDL_syssem.c \
+src/thread/nds/SDL_systhread.c \
+src/timer/dummy/SDL_systimer.c \
+src/timer/SDL_timer.c \
+src/video/dummy/SDL_nullevents.c \
+src/video/dummy/SDL_nullrender.c \
+src/video/dummy/SDL_nullvideo.c \
+src/video/nds/SDL_ndsevents.c \
+src/video/nds/SDL_ndsrender.c \
+src/video/nds/SDL_ndsvideo.c \
+src/video/SDL_blit_0.c \
+src/video/SDL_blit_1.c \
+src/video/SDL_blit_A.c \
+src/video/SDL_blit_auto.c \
+src/video/SDL_blit.c \
+src/video/SDL_blit_copy.c \
+src/video/SDL_blit_N.c \
+src/video/SDL_blit_slow.c \
+src/video/SDL_bmp.c \
+src/video/SDL_fill.c \
+src/video/SDL_gamma.c \
+src/video/SDL_pixels.c \
+src/video/SDL_rect.c \
+src/video/SDL_renderer_gl.c \
+src/video/SDL_renderer_sw.c \
+src/video/SDL_RLEaccel.c \
+src/video/SDL_stretch.c \
+src/video/SDL_surface.c \
+src/video/SDL_video.c \
+src/video/SDL_yuv_mmx.c \
+src/video/SDL_yuv_sw.c \
+
+OBJS = $(SRCS:.c=.o)
+
+TEST = \
+	test/checkkeys.c \
+	test/graywin.c \
+	test/loopwave.c \
+	test/testalpha.c \
+	test/testbitmap.c \
+	test/testcdrom.c \
+	test/testerror.c \
+	test/testgamma.c \
+	test/testgl.c \
+	test/testhread.c \
+	test/testjoystick.c \
+	test/testkeys.c \
+	test/testlock.c \
+	test/testoverlay.c \
+	test/testpalette.c \
+	test/testsem.c \
+	test/testsprite.c \
+	test/testtimer.c \
+	test/testtypes.c \
+	test/testver.c \
+	test/testvidinfo.c \
+	test/testwin.c \
+	test/testwm.c \
+	test/threadwin.c \
+	test/torturethread.c \
+
+all: $(TARGET)
+
+$(TARGET): copy_config \
+	$(OBJS)
+	$(AR) rc $(TARGET) $(OBJS)
+	-@ ($(RANLIB) $@ || true) >/dev/null 2>&1
+
+install: $(TARGET)
+	@cp libSDL.a $(DEVKITPRO)/libnds/lib/
+
+copy_config:
+	@cp include/SDL_config.h.default include/SDL_config.h
+
+clean:
+	rm -f include/SDL_config.h $(OBJS)
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/SDL_config_nintendods.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,117 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 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
+*/
+
+#ifndef _SDL_config_nintendods_h
+#define _SDL_config_nintendods_h
+
+#include "SDL_platform.h"
+
+/* This is a set of defines to configure the SDL features */
+
+typedef signed char int8_t;
+typedef unsigned char uint8_t;
+typedef signed short int16_t;
+typedef unsigned short uint16_t;
+typedef signed int int32_t;
+typedef unsigned int uint32_t;
+typedef signed long long int64_t;
+typedef unsigned long long uint64_t;
+
+/* LiF: __PTRDIFF_TYPE__ was causing errors of conflicting typedefs with the
+   <stdint.h> shipping with devkitARM.  copied a similar ifdef from it. */
+#ifndef __PTRDIFF_TYPE__
+typedef unsigned long uintptr_t;
+#else
+typedef unsigned __PTRDIFF_TYPE__ uintptr_t;
+#endif
+
+
+#define SDL_HAS_64BIT_TYPE	1
+
+/* Useful headers */
+#define HAVE_SYS_TYPES_H	1
+#define HAVE_STDIO_H	1
+#define STDC_HEADERS	1
+#define HAVE_STRING_H	1
+#define HAVE_CTYPE_H	1
+
+/* C library functions */
+#define HAVE_MALLOC	1
+#define HAVE_CALLOC	1
+#define HAVE_REALLOC	1
+#define HAVE_FREE	1
+#define HAVE_ALLOCA	1
+#define HAVE_GETENV	1
+#define HAVE_PUTENV	1
+#define HAVE_QSORT	1
+#define HAVE_ABS	1
+#define HAVE_BCOPY	1
+#define HAVE_MEMSET	1
+#define HAVE_MEMCPY	1
+#define HAVE_MEMMOVE	1
+#define HAVE_MEMCMP	1
+#define HAVE_STRLEN	1
+#define HAVE_STRDUP	1
+#define HAVE_INDEX	1
+#define HAVE_RINDEX	1
+#define HAVE_STRCHR	1
+#define HAVE_STRRCHR	1
+#define HAVE_STRSTR	1
+#define HAVE_STRTOL	1
+#define HAVE_STRTOD	1
+#define HAVE_ATOI	1
+#define HAVE_ATOF	1
+#define HAVE_STRCMP	1
+#define HAVE_STRNCMP	1
+#define HAVE_STRICMP	1
+#define HAVE_STRCASECMP	1
+#define HAVE_SSCANF	1
+#define HAVE_SNPRINTF	1
+#define HAVE_VSNPRINTF	1
+
+/* DS isn't that sophisticated */
+#define LACKS_SYS_MMAN_H 1
+
+/* Enable various audio drivers */
+#define SDL_AUDIO_DRIVER_DUMMY	1
+
+/* DS doesn't have optical media */
+#define SDL_CDROM_DISABLED	1
+
+/* Enable various input drivers */
+#define SDL_JOYSTICK_DISABLED	1
+
+/* DS has no dynamic linking afaik */
+#define SDL_LOADSO_DISABLED	1
+
+/* Enable various threading systems */
+/*#define SDL_THREAD_NDS	1*/
+#define SDL_THREADS_DISABLED	1
+
+/* Enable various timer systems */
+#define SDL_TIMERS_DISABLED	1
+
+/* Enable various video drivers */
+#define SDL_VIDEO_DRIVER_NDS	1
+
+#endif /* _SDL_config_nintendods_h */
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/joystick/nds/SDL_sysjoystick.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,154 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_sysjoystick.c,v 1.2 2001/04/26 16:50:17 hercules Exp $";
+#endif
+
+/* This is the system specific header for the SDL joystick API */
+#include <nds.h>
+//#include <nds/registers_alt.h>
+#include <stdio.h>		/* For the definition of NULL */
+
+#include "SDL_error.h"
+#include "SDL_joystick.h"
+#include "SDL_sysjoystick.h"
+#include "SDL_joystick_c.h"
+
+#include "../../video/nds/SDL_ndsevents_c.h"
+
+/* Function to scan the system for joysticks.
+ * This function should set SDL_numjoysticks to the number of available
+ * joysticks.  Joystick 0 should be the system default joystick.
+ * It should return 0, or -1 on an unrecoverable fatal error.
+ */
+int SDL_SYS_JoystickInit(void)
+{
+	SDL_numjoysticks = 1;
+    //keysInit();
+
+	return(1);
+}
+
+/* Function to get the device-dependent name of a joystick */
+const char *SDL_SYS_JoystickName(int index)
+{
+	if(!index)
+		return "NDS builtin joypad";
+	SDL_SetError("No joystick available with that index");
+	return (NULL);
+}
+
+/* Function to open a joystick for use.
+   The joystick to open is specified by the index field of the joystick.
+   This should fill the nbuttons and naxes fields of the joystick structure.
+   It returns 0, or -1 if there is an error.
+ */
+int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
+{
+	joystick->nbuttons=8;
+	joystick->nhats=0;
+	joystick->nballs=0;
+	joystick->naxes=2;
+	return 0;
+}
+
+
+/* Function to update the state of a joystick - called as a device poll.
+ * This function shouldn't update the joystick structure directly,
+ * but instead should call SDL_PrivateJoystick*() to deliver events
+ * and update joystick device state.
+ */
+
+int prevbutton=0;
+int prevkey=0;
+
+int dc=NULL;int ldc=0;
+u32 keysd,keysu=NULL;
+void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
+{
+    //dc=keysd;
+	//if (dc != NULL)
+	//{
+		//fprintf(stderr,"heartbeat= %d\n",REG_VCOUNT); 
+		//swiWaitForVBlank();
+		//scanKeys();
+		//keysd = keysDown(); 
+		//keysu = keysUp();
+		//ldc=keysd;
+		 
+	//}
+	/*if (prevkey !=NULL && prevbutton !=NULL)
+	{
+		scanKeys();
+	}
+	*/
+	
+	//scanKeys();
+		keysd = keysDown(); 
+		keysu = keysUp();
+		
+	
+	short ax=0,v=0,h=0;
+	if((keysd&KEY_UP)) {ax=1;v=-10;SDL_PrivateJoystickAxis(joystick,ax,v);prevkey=KEY_UP;}//fprintf(stderr,"KEY_UP\n");}
+	if((keysd&KEY_DOWN)) {ax=1;v=10;SDL_PrivateJoystickAxis(joystick,ax,v);prevkey=KEY_DOWN;}//fprintf(stderr,"KEY_DOWN\n");}
+	if((keysd&KEY_LEFT)) {ax=0;h=-10;SDL_PrivateJoystickAxis(joystick,ax,h);prevkey=KEY_LEFT;}//fprintf(stderr,"KEY_LEFT\n");}
+	if((keysd&KEY_RIGHT)) {ax=0;h=10;SDL_PrivateJoystickAxis(joystick,ax,h);prevkey=KEY_RIGHT;}//fprintf(stderr,"KEY_RIGHT\n");}
+
+	if((keysu&KEY_UP)) {ax=1;v=0;SDL_PrivateJoystickAxis(joystick,ax,v);prevkey=NULL;}//fprintf(stderr,"KEY_UP\n");}
+	if((keysu&KEY_DOWN)) {ax=1;v=0;SDL_PrivateJoystickAxis(joystick,ax,v);prevkey=NULL;}//fprintf(stderr,"KEY_DOWN\n");}
+	if((keysu&KEY_LEFT)) {ax=0;h=0;SDL_PrivateJoystickAxis(joystick,ax,h);prevkey=NULL;}//fprintf(stderr,"KEY_LEFT\n");}
+	if((keysu&KEY_RIGHT)) {ax=0;h=0;SDL_PrivateJoystickAxis(joystick,ax,h);prevkey=NULL;}//fprintf(stderr,"KEY_RIGHT\n");}
+
+	if((keysd&KEY_A))		{SDL_PrivateJoystickButton(joystick,0,SDL_PRESSED);prevbutton=KEY_A;}
+	if((keysd&KEY_B))		{SDL_PrivateJoystickButton(joystick,1,SDL_PRESSED);prevbutton=KEY_B;}
+	if((keysd&KEY_X))		{SDL_PrivateJoystickButton(joystick,2,SDL_PRESSED);prevbutton=KEY_X;}
+	if((keysd&KEY_Y))		{SDL_PrivateJoystickButton(joystick,3,SDL_PRESSED);prevbutton=KEY_Y;}
+	if((keysd&KEY_SELECT))	{SDL_PrivateJoystickButton(joystick,6,SDL_PRESSED);prevbutton=KEY_SELECT;}
+	if((keysd&KEY_START))	{SDL_PrivateJoystickButton(joystick,7,SDL_PRESSED);prevbutton=KEY_START;}
+	if((keysd&KEY_L))		{SDL_PrivateJoystickButton(joystick,4,SDL_PRESSED);prevbutton=KEY_L;}
+	if((keysd&KEY_R))		{SDL_PrivateJoystickButton(joystick,5,SDL_PRESSED);prevbutton=KEY_R;}
+
+	if((keysu&KEY_A))		{SDL_PrivateJoystickButton(joystick,0,SDL_RELEASED);prevbutton=NULL;}
+	if((keysu&KEY_B))		{SDL_PrivateJoystickButton(joystick,1,SDL_RELEASED);prevbutton=NULL;}
+	if((keysu&KEY_X))		{SDL_PrivateJoystickButton(joystick,2,SDL_RELEASED);prevbutton=NULL;}
+	if((keysu&KEY_Y))		{SDL_PrivateJoystickButton(joystick,3,SDL_RELEASED);prevbutton=NULL;}
+	if((keysu&KEY_SELECT))  {SDL_PrivateJoystickButton(joystick,6,SDL_RELEASED);prevbutton=NULL;}
+	if((keysu&KEY_START))	{SDL_PrivateJoystickButton(joystick,7,SDL_RELEASED);prevbutton=NULL;}
+	if((keysu&KEY_L))		{SDL_PrivateJoystickButton(joystick,4,SDL_RELEASED);prevbutton=NULL;}
+	if((keysu&KEY_R))		{SDL_PrivateJoystickButton(joystick,5,SDL_RELEASED);prevbutton=NULL;}
+
+
+
+}
+
+/* Function to close a joystick after use */
+void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
+{
+}
+
+/* Function to perform any system-specific joystick related cleanup */
+void SDL_SYS_JoystickQuit(void)
+{
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_syscond.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,223 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_syscond.c,v 1.2 2001/04/26 16:50:18 hercules Exp $";
+#endif
+
+/* An implementation of condition variables using semaphores and mutexes */
+/*
+   This implementation borrows heavily from the BeOS condition variable
+   implementation, written by Christopher Tate and Owen Smith.  Thanks!
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+
+struct SDL_cond
+{
+	SDL_mutex *lock;
+	int waiting;
+	int signals;
+	SDL_sem *wait_sem;
+	SDL_sem *wait_done;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		cond->lock = SDL_CreateMutex();
+		cond->wait_sem = SDL_CreateSemaphore(0);
+		cond->wait_done = SDL_CreateSemaphore(0);
+		cond->waiting = cond->signals = 0;
+		if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) {
+			SDL_DestroyCond(cond);
+			cond = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		if ( cond->wait_sem ) {
+			SDL_DestroySemaphore(cond->wait_sem);
+		}
+		if ( cond->wait_done ) {
+			SDL_DestroySemaphore(cond->wait_done);
+		}
+		if ( cond->lock ) {
+			SDL_DestroyMutex(cond->lock);
+		}
+		free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		++cond->signals;
+		SDL_SemPost(cond->wait_sem);
+		SDL_UnlockMutex(cond->lock);
+		SDL_SemWait(cond->wait_done);
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		int i, num_waiting;
+
+		num_waiting = (cond->waiting - cond->signals);
+		cond->signals = cond->waiting;
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemPost(cond->wait_sem);
+		}
+		/* Now all released threads are blocked here, waiting for us.
+		   Collect them all (and win fabulous prizes!) :-)
+		 */
+		SDL_UnlockMutex(cond->lock);
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemWait(cond->wait_done);
+		}
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+	SDL_LockMutex(lock);
+	while ( ! condition ) {
+		SDL_CondWait(cond);
+	}
+	SDL_UnlockMutex(lock);
+
+Thread B:
+	SDL_LockMutex(lock);
+	...
+	condition = true;
+	...
+	SDL_UnlockMutex(lock);
+ */
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* Obtain the protection mutex, and increment the number of waiters.
+	   This allows the signal mechanism to only perform a signal if there
+	   are waiting threads.
+	 */
+	SDL_LockMutex(cond->lock);
+	++cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Unlock the mutex, as is required by condition variable semantics */
+	SDL_UnlockMutex(mutex);
+
+	/* Wait for a signal */
+	if ( ms == SDL_MUTEX_MAXWAIT ) {
+		retval = SDL_SemWait(cond->wait_sem);
+	} else {
+		retval = SDL_SemWaitTimeout(cond->wait_sem, ms);
+	}
+
+	/* Let the signaler know we have completed the wait, otherwise
+           the signaler can race ahead and get the condition semaphore
+           if we are stopped between the mutex unlock and semaphore wait,
+           giving a deadlock.  See the following URL for details:
+        http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->signals > 0 ) {
+		/* If we timed out, we need to eat a condition signal */
+		if ( retval > 0 ) {
+			SDL_SemWait(cond->wait_sem);
+		}
+		/* We always notify the signal thread that we are done */
+		SDL_SemPost(cond->wait_done);
+
+		/* Signal handshake complete */
+		--cond->signals;
+	}
+	--cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Lock the mutex, as is required by condition variable semantics */
+	SDL_LockMutex(mutex);
+
+	return retval;
+}
+
+/* Wait on the condition variable forever */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_syscond_c.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,27 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_syscond_c.h,v 1.2 2001/04/26 16:50:18 hercules Exp $";
+#endif
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_sysmutex.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,137 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_sysmutex.c,v 1.2 2001/04/26 16:50:18 hercules Exp $";
+#endif
+
+/* An implementation of mutexes using semaphores */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+struct SDL_mutex {
+	int recursive;
+	Uint32 owner;
+	SDL_sem *sem;
+};
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+	SDL_mutex *mutex;
+
+	/* Allocate mutex memory */
+	mutex = (SDL_mutex *)malloc(sizeof(*mutex));
+	if ( mutex ) {
+		/* Create the mutex semaphore, with initial value 1 */
+		mutex->sem = SDL_CreateSemaphore(1);
+		mutex->recursive = 0;
+		mutex->owner = 0;
+		if ( ! mutex->sem ) {
+			free(mutex);
+			mutex = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return mutex;
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		if ( mutex->sem ) {
+			SDL_DestroySemaphore(mutex->sem);
+		}
+		free(mutex);
+	}
+}
+
+/* Lock the semaphore */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+#ifdef DISABLE_THREADS
+	return 0;
+#else
+	Uint32 this_thread;
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	this_thread = SDL_ThreadID();
+	if ( mutex->owner == this_thread ) {
+		++mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   We set the locking thread id after we obtain the lock
+		   so unlocks from other threads will fail.
+		*/
+		SDL_SemWait(mutex->sem);
+		mutex->owner = this_thread;
+		mutex->recursive = 0;
+	}
+
+	return 0;
+#endif /* DISABLE_THREADS */
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+#ifdef DISABLE_THREADS
+	return 0;
+#else
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	/* If we don't own the mutex, we can't unlock it */
+	if ( SDL_ThreadID() != mutex->owner ) {
+		SDL_SetError("mutex not owned by this thread");
+		return -1;
+	}
+
+	if ( mutex->recursive ) {
+		--mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   First reset the owner so another thread doesn't lock
+		   the mutex and set the ownership before we reset it,
+		   then release the lock semaphore.
+		 */
+		mutex->owner = 0;
+		SDL_SemPost(mutex->sem);
+	}
+	return 0;
+#endif /* DISABLE_THREADS */
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_sysmutex_c.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,27 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_sysmutex_c.h,v 1.2 2001/04/26 16:50:18 hercules Exp $";
+#endif
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_syssem.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,214 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_syssem.c,v 1.2 2001/04/26 16:50:18 hercules Exp $";
+#endif
+
+/* An implementation of semaphores using mutexes and condition variables */
+
+#include <stdlib.h>
+
+#include "SDL_error.h"
+#include "SDL_timer.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+#ifdef DISABLE_THREADS
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return (SDL_sem *)0;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	return;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	return 0;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+#else
+
+struct SDL_semaphore
+{
+	Uint32 count;
+	Uint32 waiters_count;
+	SDL_mutex *count_lock;
+	SDL_cond *count_nonzero;
+};
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_sem *sem;
+
+	sem = (SDL_sem *)malloc(sizeof(*sem));
+	if ( ! sem ) {
+		SDL_OutOfMemory();
+		return(0);
+	}
+	sem->count = initial_value;
+	sem->waiters_count = 0;
+
+	sem->count_lock = SDL_CreateMutex();
+	sem->count_nonzero = SDL_CreateCond();
+	if ( ! sem->count_lock || ! sem->count_nonzero ) {
+		SDL_DestroySemaphore(sem);
+		return(0);
+	}
+
+	return(sem);
+}
+
+/* WARNING:
+   You cannot call this function when another thread is using the semaphore.
+*/
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( sem ) {
+		sem->count = 0xFFFFFFFF;
+		while ( sem->waiters_count > 0) {
+			SDL_CondSignal(sem->count_nonzero);
+			SDL_Delay(10);
+		}
+		SDL_DestroyCond(sem->count_nonzero);
+		SDL_mutexP(sem->count_lock);
+		SDL_mutexV(sem->count_lock);
+		SDL_DestroyMutex(sem->count_lock);
+		free(sem);
+	}
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = SDL_MUTEX_TIMEDOUT;
+	SDL_LockMutex(sem->count_lock);
+	if ( sem->count > 0 ) {
+		--sem->count;
+		retval = 0;
+	}
+	SDL_UnlockMutex(sem->count_lock);
+
+	return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	/* A timeout of 0 is an easy case */
+	if ( timeout == 0 ) {
+		return SDL_SemTryWait(sem);
+	}
+
+	SDL_LockMutex(sem->count_lock);
+	++sem->waiters_count;
+	retval = 0;
+	while ( (sem->count == 0) && (retval != SDL_MUTEX_TIMEDOUT) ) {
+		retval = SDL_CondWaitTimeout(sem->count_nonzero,
+		                             sem->count_lock, timeout);
+	}
+	--sem->waiters_count;
+	--sem->count;
+	SDL_UnlockMutex(sem->count_lock);
+
+	return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	Uint32 value;
+	
+	value = 0;
+	if ( sem ) {
+		SDL_LockMutex(sem->count_lock);
+		value = sem->count;
+		SDL_UnlockMutex(sem->count_lock);
+	}
+	return value;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	SDL_LockMutex(sem->count_lock);
+	if ( sem->waiters_count > 0 ) {
+		SDL_CondSignal(sem->count_nonzero);
+	}
+	++sem->count;
+	SDL_UnlockMutex(sem->count_lock);
+
+	return 0;
+}
+
+#endif /* DISABLE_THREADS */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_syssem_c.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,27 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_syssem_c.h,v 1.2 2001/04/26 16:50:18 hercules Exp $";
+#endif
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_systhread.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,59 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id: SDL_systhread.c,v 1.2 2001/04/26 16:50:18 hercules Exp $";
+#endif
+
+/* Thread management routines for SDL */
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "SDL_systhread.h"
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	SDL_SetError("Threads are not supported on this platform");
+	return(-1);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return(0);
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	return;
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	return;
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/nds/SDL_systhread_c.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,28 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+/* Stub until we implement threads on this platform */
+typedef int SYS_ThreadHandle;
+
+#ifndef DISABLE_THREADS
+#define DISABLE_THREADS
+#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/nds/SDL_ndsevents.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,44 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 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"
+
+/* Being a null driver, there's no event stream. We just define stubs for
+   most of the API. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <nds.h>
+
+#include "SDL.h"
+#include "../../events/SDL_sysevents.h"
+#include "../../events/SDL_events_c.h"
+
+#include "SDL_ndsvideo.h"
+#include "SDL_ndsevents_c.h"
+
+void
+NDS_PumpEvents(_THIS)
+{
+    /* do nothing. */
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/nds/SDL_ndsevents_c.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,28 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 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_ndsvideo.h"
+
+extern void NDS_PumpEvents(_THIS);
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/nds/SDL_ndsrender.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,285 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 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 <stdio.h>
+#include <stdlib.h>
+#include <nds.h>
+
+#include "SDL_config.h"
+
+#include "SDL_video.h"
+#include "../SDL_sysvideo.h"
+#include "../SDL_yuv_sw_c.h"
+#include "../SDL_renderer_sw.h"
+
+
+/* SDL surface based renderer implementation */
+
+static SDL_Renderer *SDL_NDS_CreateRenderer(SDL_Window * window,
+                                              Uint32 flags);
+static int SDL_NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g,
+                                Uint8 b, Uint8 a, const SDL_Rect * rect);
+static int SDL_NDS_RenderCopy(SDL_Renderer * renderer,
+                                SDL_Texture * texture,
+                                const SDL_Rect * srcrect,
+                                const SDL_Rect * dstrect);
+static void SDL_NDS_RenderPresent(SDL_Renderer * renderer);
+static void SDL_NDS_DestroyRenderer(SDL_Renderer * renderer);
+
+
+SDL_RenderDriver SDL_NDS_RenderDriver = {
+    SDL_NDS_CreateRenderer,
+    { "nds",  SDL_RENDERER_PRESENTCOPY }
+/*   (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
+      SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
+      SDL_RENDERER_PRESENTDISCARD),*/
+};
+
+typedef struct
+{
+    int current_screen;
+    SDL_Surface *screens[3];
+    int ultimate_answer;
+} SDL_NDS_RenderData;
+
+SDL_Renderer *
+SDL_NDS_CreateRenderer(SDL_Window * window, Uint32 flags)
+{
+    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+    SDL_DisplayMode *displayMode = &display->current_mode;
+    SDL_Renderer *renderer;
+    SDL_NDS_RenderData *data;
+    int i, n;
+    int bpp = 16;
+    Uint32 Rmask = 0x7C00, Gmask = 0x03E0, Bmask = 0x001F, Amask = 0x8000;
+
+    printf("SDL_NDS_CreateRenderer(window, 0x%x)\n", flags);
+    printf(" window: (%d,%d), %dx%d\n", window->x, window->y, window->w, window->h);
+
+    /* hard coded this to ARGB1555 for now
+    if (!SDL_PixelFormatEnumToMasks
+        (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
+        SDL_SetError("Unknown display format");
+        return NULL;
+    }*/
+
+    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
+    if (!renderer) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    data = (SDL_NDS_RenderData *) SDL_malloc(sizeof(*data));
+    if (!data) {
+        SDL_NDS_DestroyRenderer(renderer);
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    SDL_zerop(data);
+
+    renderer->RenderFill = SDL_NDS_RenderFill;
+    renderer->RenderCopy = SDL_NDS_RenderCopy;
+    renderer->RenderPresent = SDL_NDS_RenderPresent;
+    renderer->DestroyRenderer = SDL_NDS_DestroyRenderer;
+    renderer->info.name = SDL_NDS_RenderDriver.info.name;
+    renderer->info.flags = 0;
+    renderer->window = window->id;
+    renderer->driverdata = data;
+    Setup_SoftwareRenderer(renderer);
+
+    if (flags & SDL_RENDERER_PRESENTFLIP2) {
+        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
+        n = 2;
+    } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
+        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
+        n = 3;
+    } else {
+        renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
+        n = 1;
+    }
+    for (i = 0; i < n; ++i) {
+        data->screens[i] =
+            SDL_CreateRGBSurface(0, 256, 192, bpp, Rmask, Gmask, Bmask, Amask);
+        if (!data->screens[i]) {
+            SDL_NDS_DestroyRenderer(renderer);
+            return NULL;
+        }
+        SDL_SetSurfacePalette(data->screens[i], display->palette);
+    }
+
+    data->current_screen = 0;
+    data->ultimate_answer = 42;
+#if 0
+#define blarg (data->screens[0])
+    printf("hello?\n");
+    if(!data || !(data->screens) || !blarg) {
+        printf("they're null.\n");
+    } else {
+        printf("not null.\n");
+        printf("%d\n%d\n%d\n%d\n%x\n%x\n%x\n%x\n",
+        blarg->w, blarg->h, blarg->pitch,
+        blarg->format->BitsPerPixel,
+        blarg->format->Rmask,
+        blarg->format->Gmask,
+        blarg->format->Bmask,
+        (u32)(blarg->pixels)); /* ARGH WHY DOESN'T THIS PRINT AT ALL? */
+        printf("hurr\n");
+    }
+#undef blarg
+#endif
+    return renderer;
+}
+
+static int
+SDL_NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
+                     Uint8 a, const SDL_Rect * rect)
+{
+    SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
+    SDL_Surface *target = data->screens[data->current_screen];
+    Uint32 color;
+    SDL_Rect real_rect = *rect;
+
+    color = SDL_MapRGBA(target->format, r, g, b, a);
+
+    return SDL_FillRect(target, &real_rect, color);
+}
+
+/* this is mainly for testing stuff to put a surface where I can see it */
+void sdlds_surf2vram(SDL_Surface *s) {
+    int i;
+    for(i = 0; i < 256*192; ++i) {
+        ((u16*)VRAM_A)[i] = ((u16*)(s->pixels))[i];
+    }
+}
+
+static int
+SDL_NDS_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+                     const SDL_Rect * srcrect, const SDL_Rect * dstrect)
+{
+    SDL_NDS_RenderData *data =
+        (SDL_NDS_RenderData *) renderer->driverdata;
+    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+    printf("SDL_NDS_RenderCopy(renderer, texture, srcrect, dstrect)\n");
+    printf(" renderer: %s\n", renderer->info.name);
+    printf(" texture: %dx%d\n", texture->w, texture->h);
+    printf(" srcrect: (%d,%d), %dx%d\n", srcrect->x, srcrect->y, srcrect->w, srcrect->h);
+    printf(" dstrect: (%d,%d), %dx%d\n", dstrect->x, dstrect->y, dstrect->w, dstrect->h);
+
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        SDL_Surface *target = data->screens[data->current_screen];
+        void *pixels =
+            (Uint8 *) target->pixels + dstrect->y * target->pitch +
+            dstrect->x * target->format->BytesPerPixel;
+        return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
+                                   srcrect, display->current_mode.format,
+                                   dstrect->w, dstrect->h, pixels,
+                                   target->pitch);
+    } else {
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+        SDL_Surface *target = data->screens[data->current_screen];
+        SDL_Rect real_srcrect = *srcrect;
+        SDL_Rect real_dstrect = *dstrect;
+        printf("Rmask %x Gmask %x Bmask %x Amask %x\n"
+               "width %d, height %d, pitch %d\nbpp %d, pixels %x\n",
+            surface->format->Rmask, surface->format->Gmask,
+            surface->format->Bmask, surface->format->Amask,
+            surface->w, surface->h, surface->pitch,
+            surface->format->BitsPerPixel, (u32)(surface->pixels));
+        sdlds_surf2vram(surface);
+        return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
+    }
+#if 0
+/* previous attempt to copy it directly to vram */
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+        int sx = srcrect->x, sy = srcrect->y, sw = srcrect->w, sh = srcrect->h;
+        int dx = dstrect->x, dy = dstrect->y, dw = dstrect->w, dh = dstrect->h;
+        int si,sj, di,dj;
+        /*printf("DEBUG: still alive!\n");*/
+        for(sj=0, dj=0; sj<sh && dj<dh; ++sj, ++dj) {
+            for(si=0, di=0; si<sw && di<dw; ++si, ++di) {
+                ((uint16*)VRAM_A)[(dj+dy)*256 + di+dx]
+                 = ((Uint16*)surface->pixels)[(sj+sy)*(surface->w) + si+sx];
+            }
+        }
+        /*printf("DEBUG: still alive!\n");*/
+    }
+    return 0;
+#endif
+}
+
+static void
+SDL_NDS_RenderPresent(SDL_Renderer * renderer)
+{
+    SDL_NDS_RenderData *data =
+        (SDL_NDS_RenderData *) renderer->driverdata;
+
+    printf("SDL_NDS_RenderPresent(renderer)\n");
+    printf(" renderer: %s\n", renderer->info.name);
+    /* Send the data to the display */
+
+#if 0
+/*testing to see if rectangles drawn get copied right*/
+    {
+    SDL_Rect ra;
+  	ra.x=0; ra.y=0; ra.w=256; ra.h=192;
+	SDL_FillRect(data->screens[data->current_screen], &ra, 0x250);
+	ra.x=32; ra.y=32; ra.w=192; ra.h=128;
+	SDL_FillRect(data->screens[data->current_screen], &ra,
+	    SDL_MapRGBA(data->screens[data->current_screen]->format,
+	    255,255,255,255));
+	}
+/*okay so this works but why not when I do it in the main()?
+  for some reason the screen I get from screen=SDL_SetVideoMode(...)
+  doesn't get copied to renderer->driverdata? */
+    for(i = 0; i < 30; ++i) swiWaitForVBlank(); /* delay for debug purpose */
+#endif
+    sdlds_surf2vram(data->screens[data->current_screen]);
+
+    /* Update the flipping chain, if any */
+    if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
+        data->current_screen = (data->current_screen + 1) % 2;
+    } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
+        data->current_screen = (data->current_screen + 1) % 3;
+    }
+}
+
+static void
+SDL_NDS_DestroyRenderer(SDL_Renderer * renderer)
+{
+    SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
+    int i;
+
+    printf("SDL_NDS_DestroyRenderer(renderer)\n");
+    printf(" renderer: %s\n", renderer->info.name);
+    if (data) {
+        for (i = 0; i < SDL_arraysize(data->screens); ++i) {
+            if (data->screens[i]) {
+                SDL_FreeSurface(data->screens[i]);
+            }
+        }
+        SDL_free(data);
+    }
+    SDL_free(renderer);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/nds/SDL_ndsrender_c.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,28 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 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"
+
+/* SDL surface based renderer implementation */
+
+extern SDL_RenderDriver SDL_NDS_RenderDriver;
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/nds/SDL_ndsvideo.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,174 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 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"
+
+/* Dummy SDL video driver implementation; this is just enough to make an
+ *  SDL-based application THINK it's got a working video driver, for
+ *  applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,
+ *  and also for use as a collection of stubs when porting SDL to a new
+ *  platform for which you haven't yet written a valid video driver.
+ *
+ * This is also a great way to determine bottlenecks: if you think that SDL
+ *  is a performance problem for a given platform, enable this driver, and
+ *  then see if your application runs faster without video overhead.
+ *
+ * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
+ *  of this was cut-and-pasted from Stephane Peter's work in the AAlib
+ *  SDL video driver.  Renamed to "DUMMY" by Sam Lantinga.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <nds.h>
+
+#include "SDL_video.h"
+#include "SDL_mouse.h"
+#include "../SDL_sysvideo.h"
+#include "../SDL_pixels_c.h"
+#include "../../events/SDL_events_c.h"
+
+#include "SDL_ndsvideo.h"
+#include "SDL_ndsevents_c.h"
+#include "SDL_ndsrender_c.h"
+
+#define NDSVID_DRIVER_NAME "nds"
+
+/* Initialization/Query functions */
+static int NDS_VideoInit(_THIS);
+static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
+static void NDS_VideoQuit(_THIS);
+
+/* DUMMY driver bootstrap functions */
+
+static int
+NDS_Available(void)
+{
+    const char *envr = SDL_getenv("SDL_VIDEODRIVER");
+	printf("NDS_Available()\n");
+    return (1);
+}
+
+static void
+NDS_DeleteDevice(SDL_VideoDevice * device)
+{
+    SDL_free(device);
+}
+
+static SDL_VideoDevice *
+NDS_CreateDevice(int devindex)
+{
+    SDL_VideoDevice *device;
+	printf("NDS_CreateDevice(%d)\n", devindex);
+
+    /* Initialize all variables that we clean on shutdown */
+    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
+    if (!device) {
+        SDL_OutOfMemory();
+        if (device) {
+            SDL_free(device);
+        }
+        return (0);
+    }
+
+    /* Set the function pointers */
+    device->VideoInit = NDS_VideoInit;
+    device->VideoQuit = NDS_VideoQuit;
+    device->SetDisplayMode = NDS_SetDisplayMode;
+    device->PumpEvents = NDS_PumpEvents;
+
+    device->num_displays = 2; /* DS = dual screens */
+
+    device->free = NDS_DeleteDevice;
+
+    return device;
+}
+
+VideoBootStrap NDS_bootstrap = {
+    NDSVID_DRIVER_NAME, "SDL NDS video driver",
+    NDS_Available, NDS_CreateDevice
+};
+
+int
+NDS_VideoInit(_THIS)
+{
+    SDL_DisplayMode mode;
+    int i;
+
+    /* simple 256x192x16x60 for now */
+    mode.w = 256;  mode.h = 192;
+    mode.format = SDL_PIXELFORMAT_ARGB1555;
+    mode.refresh_rate = 60;
+    mode.driverdata = NULL;
+
+    SDL_AddBasicVideoDisplay(&mode);
+    SDL_AddRenderDriver(0, &SDL_NDS_RenderDriver);
+
+    SDL_zero(mode);
+    SDL_AddDisplayMode(0, &mode);
+
+	/* hackish stuff to get things up and running for now, and for a console */
+	powerON(POWER_ALL);
+	videoSetMode(MODE_FB0);
+	videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub */
+	vramSetBankA(VRAM_A_LCD);
+	vramSetBankC(VRAM_C_SUB_BG);
+	irqInit();
+	irqEnable(IRQ_VBLANK);
+    /* set up console for debug text 'n stuff */
+    SUB_BG0_CR = BG_MAP_BASE(31); BG_PALETTE_SUB[255] = RGB15(31,31,31);
+	consoleInitDefault((u16*)SCREEN_BASE_BLOCK_SUB(31),
+	                   (u16*)CHAR_BASE_BLOCK_SUB(0), 16);
+    for(i = 0; i < 256*192; ++i) {
+		((u16*)VRAM_A)[i] = i;
+	}
+	for(i = 0; i < 60; ++i) swiWaitForVBlank();
+    /*NDS_SetDisplayMode(_this, &mode);*/
+    return 0;
+}
+
+static int
+NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
+{
+	/* right now this function is just hard-coded for 256x192 ARGB1555 */
+#if 0
+	videoSetMode(MODE_5_2D | DISPLAY_BG3_ACTIVE); /* display on main core */
+    videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub */
+    vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000, VRAM_B_LCD,
+                     VRAM_C_SUB_BG, VRAM_D_LCD);
+
+    /* maps well to the 256x192 screen anyway.  note: need VRAM_B for bigger */
+    BG3_CR = BG_BMP16_256x256;
+    /* affine transformation matrix.  nothing too fancy here */
+	BG3_XDX = 0x100;    BG3_XDY = 0;
+	BG3_YDX = 0;        BG3_YDY = 0x100;
+	/* x/y position */
+	BG3_CX = 0;         BG3_CY = 0;
+#endif
+    return 0;
+}
+
+void
+NDS_VideoQuit(_THIS)
+{
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/nds/SDL_ndsvideo.h	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,31 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 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"
+
+#ifndef _SDL_ndsvideo_h
+#define _SDL_ndsvideo_h
+
+#include "../SDL_sysvideo.h"
+
+#endif /* _SDL_ndsvideo_h */
+
+/* vi: set ts=4 sw=4 expandtab: */