feat(gx): add incomplete 'CGxDeviceGLSDL' (#2)

* chore(build): add vendored SDL 3.0.0 library

* chore(build): add vendored glew-cmake-2.2.0 library

* feat(console): in the presence of -opengl launch flag, change GxApi to OpenGl

* feat(gx): add uncompleted CGxDeviceGLSDL targeting Windows and Linux

* chore(build): change SDL3 linkage from shared (bad) to to static (good)

vendor/sdl-3.0.0/src/thread/vita/SDL_syscond.c

@@ -0,0 +1,204 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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_THREAD_VITA
+
+/* 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!
+ */
+
+struct SDL_Condition
+{
+    SDL_Mutex *lock;
+    int waiting;
+    int signals;
+    SDL_Semaphore *wait_sem;
+    SDL_Semaphore *wait_done;
+};
+
+/* Create a condition variable */
+SDL_Condition *SDL_CreateCondition(void)
+{
+    SDL_Condition *cond;
+
+    cond = (SDL_Condition *)SDL_malloc(sizeof(SDL_Condition));
+    if (cond != NULL) {
+        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_DestroyCondition(cond);
+            cond = NULL;
+        }
+    } else {
+        SDL_OutOfMemory();
+    }
+    return cond;
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCondition(SDL_Condition *cond)
+{
+    if (cond != NULL) {
+        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);
+        }
+        SDL_free(cond);
+    }
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_SignalCondition(SDL_Condition *cond)
+{
+    if (cond == NULL) {
+        return SDL_InvalidParamError("cond");
+    }
+
+    /* 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_PostSemaphore(cond->wait_sem);
+        SDL_UnlockMutex(cond->lock);
+        SDL_WaitSemaphore(cond->wait_done);
+    } else {
+        SDL_UnlockMutex(cond->lock);
+    }
+
+    return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_BroadcastCondition(SDL_Condition *cond)
+{
+    if (cond == NULL) {
+        return SDL_InvalidParamError("cond");
+    }
+
+    /* 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_PostSemaphore(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_WaitSemaphore(cond->wait_done);
+        }
+    } else {
+        SDL_UnlockMutex(cond->lock);
+    }
+
+    return 0;
+}
+
+/* Wait on the condition variable for at most 'timeoutNS' nanoseconds.
+   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_WaitCondition(cond, lock);
+    }
+    SDL_UnlockMutex(lock);
+
+Thread B:
+    SDL_LockMutex(lock);
+    ...
+    condition = true;
+    ...
+    SDL_SignalCondition(cond);
+    SDL_UnlockMutex(lock);
+ */
+int SDL_WaitConditionTimeoutNS(SDL_Condition *cond, SDL_Mutex *mutex, Sint64 timeoutNS)
+{
+    int retval;
+
+    if (cond == NULL) {
+        return SDL_InvalidParamError("cond");
+    }
+
+    /* 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 */
+    retval = SDL_WaitSemaphoreTimeoutNS(cond->wait_sem, timeoutNS);
+
+    /* 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_WaitSemaphore(cond->wait_sem);
+        }
+        /* We always notify the signal thread that we are done */
+        SDL_PostSemaphore(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;
+}
+
+#endif /* SDL_THREAD_VITA */

vendor/sdl-3.0.0/src/thread/vita/SDL_sysmutex.c

@@ -0,0 +1,108 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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_THREAD_VITA
+
+#include "SDL_systhread_c.h"
+
+#include <psp2/kernel/threadmgr.h>
+#include <psp2/kernel/error.h>
+
+struct SDL_Mutex
+{
+    SceKernelLwMutexWork lock;
+};
+
+SDL_Mutex *SDL_CreateMutex(void)
+{
+    SDL_Mutex *mutex = (SDL_Mutex *)SDL_malloc(sizeof(*mutex));
+    if (mutex != NULL) {
+        const SceInt32 res = sceKernelCreateLwMutex(
+                                &mutex->lock,
+                                "SDL mutex",
+                                SCE_KERNEL_MUTEX_ATTR_RECURSIVE,
+                                0,
+                                NULL);
+
+        if (res < 0) {
+            SDL_free(mutex);
+            mutex = NULL;
+            SDL_SetError("Error trying to create mutex: %x", res);
+        }
+    } else {
+        SDL_OutOfMemory();
+    }
+    return mutex;
+}
+
+void SDL_DestroyMutex(SDL_Mutex *mutex)
+{
+    if (mutex != NULL) {
+        sceKernelDeleteLwMutex(&mutex->lock);
+        SDL_free(mutex);
+    }
+}
+
+void SDL_LockMutex(SDL_Mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS  // clang doesn't know about NULL mutexes
+{
+#ifndef SDL_THREADS_DISABLED
+    if (mutex != NULL) {
+        const SceInt32 res = sceKernelLockLwMutex(&mutex->lock, 1, NULL);
+        SDL_assert(res == SCE_KERNEL_OK);  // assume we're in a lot of trouble if this assert fails.
+    }
+#endif // SDL_THREADS_DISABLED
+}
+
+int SDL_TryLockMutex(SDL_Mutex *mutex)
+{
+#ifdef SDL_THREADS_DISABLED
+    return 0;
+#else
+    SceInt32 res = 0;
+
+    if (mutex == NULL) {
+        return 0;
+    }
+
+    res = sceKernelTryLockLwMutex(&mutex->lock, 1);
+    switch (res) {
+    case SCE_KERNEL_OK: return 0;
+    case SCE_KERNEL_ERROR_MUTEX_FAILED_TO_OWN: return SDL_MUTEX_TIMEDOUT;
+    default: break;
+    }
+
+    SDL_assert(!"Error trying to lock mutex");  // assume we're in a lot of trouble if this assert fails.
+    return SDL_MUTEX_TIMEDOUT;
+#endif // SDL_THREADS_DISABLED
+}
+
+void SDL_UnlockMutex(SDL_Mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS  // clang doesn't know about NULL mutexes
+{
+#ifndef SDL_THREADS_DISABLED
+    if (mutex != NULL) {
+        const SceInt32 res = sceKernelUnlockLwMutex(&mutex->lock, 1);
+        SDL_assert(res == SCE_KERNEL_OK);  // assume we're in a lot of trouble if this assert fails.
+    }
+#endif // SDL_THREADS_DISABLED
+}
+
+#endif // SDL_THREAD_VITA

vendor/sdl-3.0.0/src/thread/vita/SDL_sysmutex_c.h

@@ -0,0 +1,21 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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"

vendor/sdl-3.0.0/src/thread/vita/SDL_syssem.c

@@ -0,0 +1,147 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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_THREAD_VITA
+
+/* Semaphore functions for the VITA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <psp2/types.h>
+#include <psp2/kernel/error.h>
+#include <psp2/kernel/threadmgr.h>
+
+struct SDL_Semaphore
+{
+    SceUID semid;
+};
+
+/* Create a semaphore */
+SDL_Semaphore *SDL_CreateSemaphore(Uint32 initial_value)
+{
+    SDL_Semaphore *sem;
+
+    sem = (SDL_Semaphore *)SDL_malloc(sizeof(*sem));
+    if (sem != NULL) {
+        /* TODO: Figure out the limit on the maximum value. */
+        sem->semid = sceKernelCreateSema("SDL sema", 0, initial_value, 255, NULL);
+        if (sem->semid < 0) {
+            SDL_SetError("Couldn't create semaphore");
+            SDL_free(sem);
+            sem = NULL;
+        }
+    } else {
+        SDL_OutOfMemory();
+    }
+
+    return sem;
+}
+
+/* Free the semaphore */
+void SDL_DestroySemaphore(SDL_Semaphore *sem)
+{
+    if (sem != NULL) {
+        if (sem->semid > 0) {
+            sceKernelDeleteSema(sem->semid);
+            sem->semid = 0;
+        }
+
+        SDL_free(sem);
+    }
+}
+
+/* TODO: This routine is a bit overloaded.
+ * If the timeout is 0 then just poll the semaphore; if it's -1, pass
+ * NULL to sceKernelWaitSema() so that it waits indefinitely; and if the timeout
+ * is specified, convert it to microseconds. */
+int SDL_WaitSemaphoreTimeoutNS(SDL_Semaphore *sem, Sint64 timeoutNS)
+{
+    SceUInt timeoutUS;
+    SceUInt *pTimeout;
+    int res;
+
+    if (sem == NULL) {
+        return SDL_InvalidParamError("sem");
+    }
+
+    if (timeoutNS == 0) {
+        res = sceKernelPollSema(sem->semid, 1);
+        if (res < 0) {
+            return SDL_MUTEX_TIMEDOUT;
+        }
+        return 0;
+    }
+
+    if (timeoutNS < 0) {
+        pTimeout = NULL;
+    } else {
+        timeoutUS = (SceUInt)SDL_NS_TO_US(timeoutNS); /* Convert to microseconds. */
+        pTimeout = &timeoutUS;
+    }
+
+    res = sceKernelWaitSema(sem->semid, 1, pTimeout);
+    switch (res) {
+    case SCE_KERNEL_OK:
+        return 0;
+    case SCE_KERNEL_ERROR_WAIT_TIMEOUT:
+        return SDL_MUTEX_TIMEDOUT;
+    default:
+        return SDL_SetError("sceKernelWaitSema() failed");
+    }
+}
+
+/* Returns the current count of the semaphore */
+Uint32 SDL_GetSemaphoreValue(SDL_Semaphore *sem)
+{
+    SceKernelSemaInfo info;
+    info.size = sizeof(info);
+
+    if (sem == NULL) {
+        SDL_InvalidParamError("sem");
+        return 0;
+    }
+
+    if (sceKernelGetSemaInfo(sem->semid, &info) >= 0) {
+        return info.currentCount;
+    }
+
+    return 0;
+}
+
+int SDL_PostSemaphore(SDL_Semaphore *sem)
+{
+    int res;
+
+    if (sem == NULL) {
+        return SDL_InvalidParamError("sem");
+    }
+
+    res = sceKernelSignalSema(sem->semid, 1);
+    if (res < 0) {
+        return SDL_SetError("sceKernelSignalSema() failed");
+    }
+
+    return 0;
+}
+
+#endif /* SDL_THREAD_VITA */

vendor/sdl-3.0.0/src/thread/vita/SDL_systhread.c

@@ -0,0 +1,133 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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_THREAD_VITA
+
+/* VITA thread management routines for SDL */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../SDL_systhread.h"
+#include "../SDL_thread_c.h"
+#include <psp2/types.h>
+#include <psp2/kernel/threadmgr.h>
+
+#define VITA_THREAD_STACK_SIZE_MIN     0x1000    // 4KiB
+#define VITA_THREAD_STACK_SIZE_MAX     0x2000000 // 32MiB
+#define VITA_THREAD_STACK_SIZE_DEFAULT 0x10000   // 64KiB
+#define VITA_THREAD_NAME_MAX           32
+
+#define VITA_THREAD_PRIORITY_LOW           191
+#define VITA_THREAD_PRIORITY_NORMAL        160
+#define VITA_THREAD_PRIORITY_HIGH          112
+#define VITA_THREAD_PRIORITY_TIME_CRITICAL 64
+
+static int ThreadEntry(SceSize args, void *argp)
+{
+    SDL_RunThread(*(SDL_Thread **)argp);
+    return 0;
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread)
+{
+    char thread_name[VITA_THREAD_NAME_MAX];
+    size_t stack_size = VITA_THREAD_STACK_SIZE_DEFAULT;
+
+    SDL_strlcpy(thread_name, "SDL thread", VITA_THREAD_NAME_MAX);
+    if (thread->name) {
+        SDL_strlcpy(thread_name, thread->name, VITA_THREAD_NAME_MAX);
+    }
+
+    if (thread->stacksize) {
+        if (thread->stacksize < VITA_THREAD_STACK_SIZE_MIN) {
+            thread->stacksize = VITA_THREAD_STACK_SIZE_MIN;
+        }
+        if (thread->stacksize > VITA_THREAD_STACK_SIZE_MAX) {
+            thread->stacksize = VITA_THREAD_STACK_SIZE_MAX;
+        }
+        stack_size = thread->stacksize;
+    }
+
+    /* Create new thread with the same priority as the current thread */
+    thread->handle = sceKernelCreateThread(
+        thread_name, // name
+        ThreadEntry, // function to run
+        0,           // priority. 0 means priority of calling thread
+        stack_size,  // stack size
+        0,           // attributes. always 0
+        0,           // cpu affinity mask. 0 = all CPUs
+        NULL         // opt. always NULL
+    );
+
+    if (thread->handle < 0) {
+        return SDL_SetError("sceKernelCreateThread() failed");
+    }
+
+    sceKernelStartThread(thread->handle, 4, &thread);
+    return 0;
+}
+
+void SDL_SYS_SetupThread(const char *name)
+{
+    /* Do nothing. */
+}
+
+SDL_threadID SDL_ThreadID(void)
+{
+    return (SDL_threadID)sceKernelGetThreadId();
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+    sceKernelWaitThreadEnd(thread->handle, NULL, NULL);
+    sceKernelDeleteThread(thread->handle);
+}
+
+void SDL_SYS_DetachThread(SDL_Thread *thread)
+{
+    /* Do nothing. */
+}
+
+int SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
+{
+    int value = VITA_THREAD_PRIORITY_NORMAL;
+
+    switch (priority) {
+    case SDL_THREAD_PRIORITY_LOW:
+        value = VITA_THREAD_PRIORITY_LOW;
+        break;
+    case SDL_THREAD_PRIORITY_NORMAL:
+        value = VITA_THREAD_PRIORITY_NORMAL;
+        break;
+    case SDL_THREAD_PRIORITY_HIGH:
+        value = VITA_THREAD_PRIORITY_HIGH;
+        break;
+    case SDL_THREAD_PRIORITY_TIME_CRITICAL:
+        value = VITA_THREAD_PRIORITY_TIME_CRITICAL;
+        break;
+    }
+
+    return sceKernelChangeThreadPriority(0, value);
+}
+
+#endif /* SDL_THREAD_VITA */

vendor/sdl-3.0.0/src/thread/vita/SDL_systhread_c.h

@@ -0,0 +1,24 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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 <psp2/types.h>
+
+typedef SceUID SYS_ThreadHandle;