SWITCH: first commit, missing audio, input... (#1)

* SWITCH: first commit, missing audio, input...

CMakeLists.switch

@@ -0,0 +1,78 @@
+cmake_minimum_required(VERSION 3.0)
+#set(CMAKE_VERBOSE_MAKEFILE ON)
+
+set(CMAKE_SYSTEM_NAME "Generic")
+
+set(DEVKITPRO $ENV{DEVKITPRO})
+set(CMAKE_SYSTEM_PROCESSOR "armv8-a")
+set(CMAKE_C_COMPILER "${DEVKITPRO}/devkitA64/bin/aarch64-none-elf-gcc")
+set(CMAKE_CXX_COMPILER "${DEVKITPRO}/devkitA64/bin/aarch64-none-elf-g++")
+set(CMAKE_ASM_COMPILER "${DEVKITPRO}/devkitA64/bin/aarch64-none-elf-as")
+set(CMAKE_AR "${DEVKITPRO}/devkitA64/bin/aarch64-none-elf-gcc-ar" CACHE STRING "")
+set(CMAKE_RANLIB "${DEVKITPRO}/devkitA64/bin/aarch64-none-elf-gcc-ranlib" CACHE STRING "")
+set(CMAKE_C_FLAGS "-O2 -march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIC -ftls-model=local-exec -I${DEVKITPRO}/libnx/include -I${DEVKITPRO}/portlibs/switch/include" CACHE STRING "C flags")
+set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -fpermissive -fno-rtti -fno-exceptions -std=gnu++11" CACHE STRING "C++ flags")
+set(CMAKE_FIND_ROOT_PATH ${DEVKITPRO} ${DEVKITPRO}/devkitA64 ${DEVKITPRO}/libnx ${DEVKITPRO}/portlibs/switch)
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+set(BUILD_SHARED_LIBS OFF CACHE INTERNAL "Shared libs not available")
+
+project(SDL2)
+
+set(SRC_DIRS
+        src
+        src/atomic
+        src/audio
+        #src/audio/switch
+        src/audio/dummy
+        src/cpuinfo
+        src/events
+        src/file
+        src/filesystem/dummy
+        src/haptic
+        src/haptic/dummy
+        src/joystick
+        #src/joystick/switch
+        src/joystick/dummy
+        src/libm
+        src/power
+        src/render
+        src/render/software
+        src/stdlib
+        src/thread
+        src/thread/switch
+        src/timer
+        src/timer/switch
+        src/video
+        src/video/yuv2rgb
+        src/video/switch
+        )
+
+set(SRC_FILES )
+foreach (DIR ${SRC_DIRS})
+    file(GLOB FILES ${DIR}/*.c*)
+    list(APPEND SRC_FILES ${FILES})
+endforeach (DIR)
+
+# SDL2 library
+add_library(${PROJECT_NAME} STATIC ${SRC_FILES})
+target_include_directories(${PROJECT_NAME} PUBLIC ${SRC_DIRS} include)
+target_compile_options(${PROJECT_NAME} PUBLIC -O3 -DSWITCH)
+
+# SDL2 test
+add_executable(${PROJECT_NAME}.elf test/testswitch.c)
+target_include_directories(${PROJECT_NAME}.elf PRIVATE include)
+#target_include_directories(${PROJECT_NAME}.elf PRIVATE ${DEVKITPRO}/portlibs/switch/include)
+target_compile_options(${PROJECT_NAME}.elf PRIVATE -O3 -DSWITCH)
+target_link_libraries(${PROJECT_NAME}.elf
+        ${PROJECT_NAME}
+        #${DEVKITPRO}/portlibs/switch/lib/libSDL2.a
+        ${DEVKITPRO}/libnx/lib/libnx.a
+        m
+        )
+set_target_properties(${PROJECT_NAME}.elf PROPERTIES LINK_FLAGS "-specs=${DEVKITPRO}/libnx/switch.specs")
+add_custom_target(${PROJECT_NAME}.nro
+        DEPENDS ${PROJECT_NAME}.elf
+        COMMAND elf2nro ${PROJECT_NAME}.elf ${PROJECT_NAME}.nro)

configure.ac

@@ -4233,6 +4233,7 @@ AS_HELP_STRING([--enable-render-d3d], [enable the Direct3D render driver [[defau
 	aarch64-none-elf*)
         ARCH=switch
         EXTRA_CFLAGS="$EXTRA_CFLAGS -isystem${DEVKITPRO}/libnx/include -I${DEVKITPRO}/portlibs/switch/include -D__SWITCH__=1"
+        EXTRA_CFLAGS="$EXTRA_CFLAGS -g -O2 -march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIC -ftls-model=local-exec"
         CheckDeclarationAfterStatement
         CheckDiskAudio
         CheckDummyAudio

src/thread/switch/SDL_syscond.c

@@ -0,0 +1,140 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include <switch.h>
+#include "../../SDL_internal.h"
+
+#if SDL_THREAD_SWITCH
+
+/* 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 "SDL_thread.h"
+
+struct SDL_cond
+{
+    Mutex mutex;
+    CondVar var;
+};
+
+/* Create a condition variable */
+SDL_cond *
+SDL_CreateCond(void)
+{
+    SDL_cond *cond;
+
+    cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+    if (cond) {
+        mutexInit(&cond->mutex);
+        condvarInit(&cond->var, &cond->mutex);
+    }
+    else {
+        SDL_OutOfMemory();
+    }
+    return (cond);
+}
+
+/* Destroy a condition variable */
+void
+SDL_DestroyCond(SDL_cond *cond)
+{
+    if (cond) {
+        SDL_free(cond);
+    }
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int
+SDL_CondSignal(SDL_cond *cond)
+{
+    if (!cond) {
+        return SDL_SetError("Passed a NULL condition variable");
+    }
+
+    condvarWakeOne(&cond->var);
+
+    return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int
+SDL_CondBroadcast(SDL_cond *cond)
+{
+    if (!cond) {
+        return SDL_SetError("Passed a NULL condition variable");
+    }
+
+    condvarWakeAll(&cond->var);
+
+    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, lock);
+    }
+    SDL_UnlockMutex(lock);
+
+Thread B:
+    SDL_LockMutex(lock);
+    ...
+    condition = true;
+    ...
+    SDL_CondSignal(cond);
+    SDL_UnlockMutex(lock);
+ */
+int
+SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+    if (!cond) {
+        return SDL_SetError("Passed a NULL condition variable");
+    }
+
+    /* Unlock the mutex, as is required by condition variable semantics */
+    SDL_UnlockMutex(mutex);
+
+    condvarWaitTimeout(&cond->var, ms * 1000000);
+
+    /* Lock the mutex, as is required by condition variable semantics */
+    SDL_LockMutex(mutex);
+
+    return 0;
+}
+
+/* Wait on the condition variable forever */
+int
+SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+    return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}
+
+#endif /* SDL_THREAD_SWITCH */
+
+/* vi: set ts=4 sw=4 expandtab: */

src/thread/switch/SDL_sysmutex.c

@@ -0,0 +1,122 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#if SDL_THREAD_SWITCH
+
+/* An implementation of mutexes using semaphores */
+
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+struct SDL_mutex
+{
+    int recursive;
+    Uint32 owner;
+    Mutex mutex;
+};
+
+/* Create a mutex */
+SDL_mutex *
+SDL_CreateMutex(void)
+{
+    SDL_mutex *mutex;
+
+    mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex));
+    if (mutex) {
+        mutexInit(&mutex->mutex);
+        mutex->recursive = 0;
+        mutex->owner = 0;
+    }
+    else {
+        SDL_OutOfMemory();
+    }
+    return mutex;
+}
+
+/* Free the mutex */
+void
+SDL_DestroyMutex(SDL_mutex *mutex)
+{
+    if (mutex) {
+        SDL_free(mutex);
+    }
+}
+
+/* Lock the semaphore */
+int
+SDL_mutexP(SDL_mutex *mutex)
+{
+    Uint32 this_thread;
+
+    if (mutex == NULL) {
+        SDL_SetError("Passed a NULL mutex");
+        return -1;
+    }
+
+    this_thread = (Uint32) 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.
+        */
+        mutexLock(&mutex->mutex);
+        mutex->owner = this_thread;
+        mutex->recursive = 0;
+    }
+
+    return 0;
+}
+
+/* Unlock the mutex */
+int
+SDL_mutexV(SDL_mutex *mutex)
+{
+    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;
+        mutexUnlock(&mutex->mutex);
+    }
+    return 0;
+}
+
+#endif /* SDL_THREAD_SWITCH */

src/thread/switch/SDL_sysmutex_c.h

@@ -0,0 +1,22 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"

src/thread/switch/SDL_syssem.c

@@ -0,0 +1,172 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#if SDL_THREAD_SWITCH
+
+/* Semaphore functions for the VITA. */
+
+#include <stdio.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+
+struct SDL_semaphore
+{
+    Uint32 count;
+    Uint32 waiters_count;
+    SDL_mutex *count_lock;
+    SDL_cond *count_nonzero;
+};
+
+/* Create a semaphore */
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+    SDL_sem *sem;
+
+    sem = (SDL_sem *) SDL_malloc(sizeof(*sem));
+    if (!sem) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    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 NULL;
+    }
+
+    return sem;
+}
+
+/* Free 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);
+        if (sem->count_lock) {
+            SDL_mutexP(sem->count_lock);
+            SDL_mutexV(sem->count_lock);
+            SDL_DestroyMutex(sem->count_lock);
+        }
+        SDL_free(sem);
+    }
+}
+
+/* TODO: This routine is a bit overloaded.
+ * If the timeout is 0 then just poll the semaphore; if it's SDL_MUTEX_MAXWAIT, pass
+ * NULL to sceKernelWaitSema() so that it waits indefinitely; and if the timeout
+ * is specified, convert it to microseconds. */
+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;
+    if (retval == 0) {
+        --sem->count;
+    }
+    SDL_UnlockMutex(sem->count_lock);
+
+    return retval;
+}
+
+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_SemWait(SDL_sem *sem)
+{
+    return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+/* Returns the current count of the semaphore */
+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 /* SDL_THREAD_SWITCH */

src/thread/switch/SDL_systhread.c

@@ -0,0 +1,87 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#if SDL_THREAD_SWITCH
+
+/* SWITCH thread management routines for SDL */
+
+#include <stdio.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "../SDL_systhread.h"
+
+#define STACK_SIZE 0x2000
+
+static void ThreadEntry(void *argp)
+{
+    SDL_RunThread(*(void **) argp);
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+    Result res = threadCreate(&thread->handle, ThreadEntry, args, STACK_SIZE, 0x2C, -2);
+    if (res != 0) {
+        return SDL_SetError("threadCreate() failed: 0x%08X", res);
+    }
+
+    res = threadStart(&thread->handle);
+    if (res != 0) {
+        return SDL_SetError("threadStart() failed: 0x%08X", res);
+    }
+
+    return 0;
+}
+
+void SDL_SYS_SetupThread(const char *name)
+{
+    /* Do nothing. */
+}
+
+SDL_threadID SDL_ThreadID(void)
+{
+    return (SDL_threadID) 0;
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+    threadWaitForExit(&thread->handle);
+}
+
+void SDL_SYS_DetachThread(SDL_Thread *thread)
+{
+    // TODO ?
+    threadClose(&thread->handle);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+    // TODO ?
+    threadClose(&thread->handle);
+}
+
+int SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
+{
+    return 0;
+}
+
+#endif /* SDL_THREAD_SWITCH */

src/thread/switch/SDL_systhread_c.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -21,4 +21,4 @@
 
 #include <switch.h>
 
-typedef Thread* SYS_ThreadHandle;
+typedef Thread SYS_ThreadHandle;

src/thread/switch/SDL_systls.c

@@ -0,0 +1,34 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../SDL_thread_c.h"
+
+SDL_TLSData *
+SDL_SYS_GetTLSData(void)
+{
+    return SDL_Generic_GetTLSData();
+}
+
+int
+SDL_SYS_SetTLSData(SDL_TLSData *data)
+{
+    return SDL_Generic_SetTLSData(data);
+}

src/timer/switch/SDL_systimer.c

@@ -0,0 +1,78 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#ifdef SDL_TIMER_SWITCH
+
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+#include "../SDL_timer_c.h"
+#include <switch.h>
+
+static bool started = false;
+
+static Uint64 start = 0;
+
+void
+SDL_TicksInit(void)
+{
+    if (started) {
+        return;
+    }
+
+    start = SDL_GetPerformanceCounter();
+    started = true;
+}
+
+void
+SDL_TicksQuit(void)
+{
+    started = false;
+}
+
+Uint32 SDL_GetTicks(void)
+{
+    if (!started) {
+        SDL_TicksInit();
+    }
+
+    return (Uint32) ((SDL_GetPerformanceCounter() - start) * 1000 / SDL_GetPerformanceFrequency());
+}
+
+Uint64
+SDL_GetPerformanceCounter(void)
+{
+    return svcGetSystemTick();
+}
+
+Uint64
+SDL_GetPerformanceFrequency(void)
+{
+    return 19200000;
+}
+
+void
+SDL_Delay(Uint32 ms)
+{
+    svcSleepThread((Uint64) ms * 1000000);
+}
+
+#endif /* SDL_TIMER_SWITCH */

src/video/SDL_sysvideo.h

@@ -439,6 +439,7 @@ extern VideoBootStrap QNX_bootstrap;
 extern VideoBootStrap OFFSCREEN_bootstrap;
 extern VideoBootStrap OS2DIVE_bootstrap;
 extern VideoBootStrap OS2VMAN_bootstrap;
+extern VideoBootStrap SWITCH_bootstrap;
 
 extern SDL_VideoDevice *SDL_GetVideoDevice(void);
 extern int SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode);

src/video/SDL_video.c

@@ -117,6 +117,9 @@ static VideoBootStrap *bootstrap[] = {
     &OS2DIVE_bootstrap,
     &OS2VMAN_bootstrap,
 #endif
+#if SDL_VIDEO_DRIVER_SWITCH
+    &SWITCH_bootstrap,
+#endif
 #if SDL_VIDEO_DRIVER_DUMMY
     &DUMMY_bootstrap,
 #endif

src/video/switch/SDL_switchvideo.c

@@ -0,0 +1,168 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#if SDL_VIDEO_DRIVER_SWITCH
+
+/* SDL internals */
+#include "../SDL_sysvideo.h"
+
+#include <switch.h>
+
+#define SWITCH_DATA "_SDL_SwitchData"
+#define SCREEN_WIDTH    1280
+#define SCREEN_HEIGHT   720
+
+static int SWITCH_VideoInit(_THIS);
+
+static int SWITCH_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode);
+
+static void SWITCH_VideoQuit(_THIS);
+
+static void SWITCH_PumpEvents(_THIS);
+
+static int SWITCH_CreateWindowFramebuffer(_THIS, SDL_Window *window, Uint32 *format, void **pixels, int *pitch);
+
+static int SWITCH_UpdateWindowFramebuffer(_THIS, SDL_Window *window, const SDL_Rect *rects, int numrects);
+
+static void SWITCH_DestroyWindowFramebuffer(_THIS, SDL_Window *window);
+
+static int SWITCH_Available(void)
+{
+    return 1;
+}
+
+static void SWITCH_DeleteDevice(SDL_VideoDevice *device)
+{
+    SDL_free(device);
+}
+
+static SDL_VideoDevice *SWITCH_CreateDevice(int devindex)
+{
+    SDL_VideoDevice *device;
+
+    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
+    if (!device) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    device->VideoInit = SWITCH_VideoInit;
+    device->VideoQuit = SWITCH_VideoQuit;
+    device->SetDisplayMode = SWITCH_SetDisplayMode;
+    device->PumpEvents = SWITCH_PumpEvents;
+    device->CreateWindowFramebuffer = SWITCH_CreateWindowFramebuffer;
+    device->UpdateWindowFramebuffer = SWITCH_UpdateWindowFramebuffer;
+    device->DestroyWindowFramebuffer = SWITCH_DestroyWindowFramebuffer;
+
+    device->free = SWITCH_DeleteDevice;
+
+    return device;
+}
+
+VideoBootStrap SWITCH_bootstrap = {
+    "Switch", "Video driver for Nintendo Switch (libnx)",
+    SWITCH_Available, SWITCH_CreateDevice
+};
+
+static int SWITCH_VideoInit(_THIS)
+{
+    SDL_DisplayMode mode;
+
+    gfxInitResolution(SCREEN_WIDTH, SCREEN_HEIGHT);
+    gfxInitDefault();
+    gfxSetMode(GfxMode_LinearDouble);
+
+    mode.format = SDL_PIXELFORMAT_ARGB8888;
+    mode.w = SCREEN_WIDTH;
+    mode.h = SCREEN_HEIGHT;
+    mode.refresh_rate = 60;
+    mode.driverdata = NULL;
+    if (SDL_AddBasicVideoDisplay(&mode) < 0) {
+        return -1;
+    }
+
+    SDL_AddDisplayMode(&_this->displays[0], &mode);
+
+    return 0;
+}
+
+static void SWITCH_VideoQuit(_THIS)
+{
+    gfxExit();
+}
+
+static int SWITCH_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode)
+{
+    // TODO: use gfxConfigureResolution
+    return 0;
+}
+
+static void SWITCH_PumpEvents(_THIS)
+{
+    // TODO
+}
+
+typedef struct
+{
+} SWITCH_WindowData;
+
+static int SWITCH_CreateWindowFramebuffer(_THIS, SDL_Window *window, Uint32 *format, void **pixels, int *pitch)
+{
+    int w, h;
+
+    //SWITCH_WindowData *data = SDL_calloc(1, sizeof(SWITCH_WindowData));
+    //SDL_SetWindowData(window, SWITCH_DATA, data);
+
+    SDL_GetWindowSize(window, &w, &h);
+    gfxConfigureResolution(w, h);
+    *pitch = w * 4;
+    *format = SDL_PIXELFORMAT_ABGR8888;
+    *pixels = gfxGetFramebuffer(NULL, NULL);
+
+    return 0;
+}
+
+static int SWITCH_UpdateWindowFramebuffer(_THIS, SDL_Window *window, const SDL_Rect *rects, int numrects)
+{
+    //SWITCH_WindowData *data = (SWITCH_WindowData *) SDL_GetWindowData(window, SWITCH_DATA);
+    //if (!data) {
+    //    return SDL_SetError("Couldn't find switch data for window");
+    //}
+
+    gfxFlushBuffers();
+    gfxSwapBuffers();
+    gfxWaitForVsync();
+
+    // update fb ptr for double buffering
+    window->surface->pixels = gfxGetFramebuffer(NULL, NULL);
+
+    return 0;
+}
+
+static void SWITCH_DestroyWindowFramebuffer(_THIS, SDL_Window *window)
+{
+    //SWITCH_WindowData *data = (SWITCH_WindowData *) SDL_GetWindowData(window, SWITCH_DATA);
+    //SDL_free(data);
+}
+
+#endif /* SDL_VIDEO_DRIVER_SWITCH */

test/testswitch.c

@@ -0,0 +1,69 @@
+/*
+  Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <switch.h>
+#include "SDL2/SDL.h"
+
+#define WINDOW_WIDTH    1280
+#define WINDOW_HEIGHT   720
+
+SDL_Renderer *renderer = NULL;
+
+int done = 0;
+
+int main(int argc, char *argv[])
+{
+    consoleDebugInit(debugDevice_SVC);
+    stdout = stderr;
+
+    SDL_Window *window;
+
+    if (SDL_CreateWindowAndRenderer(WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer) < 0) {
+        printf("SDL_CreateWindowAndRenderer: %s\n", SDL_GetError());
+        return -1;
+    }
+
+    SDL_Event event;
+
+    printf("entering main loop\n");
+
+    while (!done) {
+
+        while (SDL_PollEvent(&event)) {
+            if (event.type == SDL_QUIT || event.type == SDL_KEYDOWN) {
+                done = 1;
+            }
+        }
+
+        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+        SDL_RenderClear(renderer);
+
+        SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+        SDL_Rect r = {0, 0, 64, 64};
+        SDL_RenderFillRect(renderer, &r);
+
+        SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
+        SDL_Rect g = {64, 0, 64, 64};
+        SDL_RenderFillRect(renderer, &g);
+
+        SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
+        SDL_Rect b = {128, 0, 64, 64};
+        SDL_RenderFillRect(renderer, &b);
+
+        SDL_RenderPresent(renderer);
+    }
+
+    return 0;
+}