/**
* Return true if the given context and surfaces can be made current.
*/
static EGLBoolean
_eglCheckMakeCurrent(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
_EGLDisplay *dpy;
EGLint conflict_api;
if (_eglIsCurrentThreadDummy())
return _eglError(EGL_BAD_ALLOC, "eglMakeCurrent");
/* this is easy */
if (!ctx) {
if (draw || read)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
return EGL_TRUE;
}
dpy = ctx->Resource.Display;
if (!dpy->Extensions.KHR_surfaceless_context
&& (draw == NULL || read == NULL))
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
/*
* The spec says
*
* "If ctx is current to some other thread, or if either draw or read are
* bound to contexts in another thread, an EGL_BAD_ACCESS error is
* generated."
*
* and
*
* "at most one context may be bound to a particular surface at a given
* time"
*/
if (ctx->Binding && ctx->Binding != t)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
if (draw && draw->CurrentContext && draw->CurrentContext != ctx) {
if (draw->CurrentContext->Binding != t ||
draw->CurrentContext->ClientAPI != ctx->ClientAPI)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
}
if (read && read->CurrentContext && read->CurrentContext != ctx) {
if (read->CurrentContext->Binding != t ||
read->CurrentContext->ClientAPI != ctx->ClientAPI)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
}
/* If the context has a config then it must match that of the two
* surfaces */
if (ctx->Config) {
if ((draw && draw->Config != ctx->Config) ||
(read && read->Config != ctx->Config))
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
} else {
/* Otherwise we must be using the EGL_MESA_configless_context
* extension */
assert(dpy->Extensions.MESA_configless_context);
/* The extension doesn't permit binding draw and read buffers with
* differing contexts */
if (draw && read && draw->Config != read->Config)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
}
switch (ctx->ClientAPI) {
/* OpenGL and OpenGL ES are conflicting */
case EGL_OPENGL_ES_API:
conflict_api = EGL_OPENGL_API;
break;
case EGL_OPENGL_API:
conflict_api = EGL_OPENGL_ES_API;
break;
default:
conflict_api = -1;
break;
}
if (conflict_api >= 0 && _eglGetAPIContext(conflict_api))
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
return EGL_TRUE;
}
/**
* Return true if the given context and surfaces can be made current.
*/
static EGLBoolean
_eglCheckMakeCurrent(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
_EGLDisplay *dpy;
EGLint conflict_api;
if (_eglIsCurrentThreadDummy())
return _eglError(EGL_BAD_ALLOC, "eglMakeCurrent");
/* this is easy */
if (!ctx) {
if (draw || read)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
return EGL_TRUE;
}
dpy = ctx->Resource.Display;
if (!dpy->Extensions.KHR_surfaceless_context
&& (draw == NULL || read == NULL))
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
/*
* The spec says
*
* "If ctx is current to some other thread, or if either draw or read are
* bound to contexts in another thread, an EGL_BAD_ACCESS error is
* generated."
*
* and
*
* "at most one context may be bound to a particular surface at a given
* time"
*/
if (ctx->Binding && ctx->Binding != t)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
if (draw && draw->CurrentContext && draw->CurrentContext != ctx) {
if (draw->CurrentContext->Binding != t ||
draw->CurrentContext->ClientAPI != ctx->ClientAPI)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
}
if (read && read->CurrentContext && read->CurrentContext != ctx) {
if (read->CurrentContext->Binding != t ||
read->CurrentContext->ClientAPI != ctx->ClientAPI)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
}
/* simply require the configs to be equal */
if ((draw && draw->Config != ctx->Config) ||
(read && read->Config != ctx->Config))
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
switch (ctx->ClientAPI) {
/* OpenGL and OpenGL ES are conflicting */
case EGL_OPENGL_ES_API:
conflict_api = EGL_OPENGL_API;
break;
case EGL_OPENGL_API:
conflict_api = EGL_OPENGL_ES_API;
break;
default:
conflict_api = -1;
break;
}
if (conflict_api >= 0 && _eglGetAPIContext(conflict_api))
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
return EGL_TRUE;
}
/**
* Drivers will typically call this to do the error checking and
* update the various IsBound and DeletePending flags.
* Then, the driver will do its device-dependent Make-Current stuff.
*/
EGLBoolean
_eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d,
EGLSurface r, EGLContext context)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
_EGLContext *ctx = _eglLookupContext(context);
_EGLSurface *draw = _eglLookupSurface(d);
_EGLSurface *read = _eglLookupSurface(r);
_EGLContext *oldContext = _eglGetCurrentContext();
_EGLSurface *oldDrawSurface = _eglGetCurrentSurface(EGL_DRAW);
_EGLSurface *oldReadSurface = _eglGetCurrentSurface(EGL_READ);
/* error checking */
if (ctx) {
if (draw == NULL || read == NULL) {
_eglError(EGL_BAD_MATCH, "eglMakeCurrent");
return EGL_FALSE;
}
if (draw->Config != ctx->Config) {
_eglError(EGL_BAD_MATCH, "eglMakeCurrent");
return EGL_FALSE;
}
if (read->Config != ctx->Config) {
_eglError(EGL_BAD_MATCH, "eglMakeCurrent");
return EGL_FALSE;
}
}
/*
* check if the old context or surfaces need to be deleted
*/
if (oldDrawSurface != NULL) {
oldDrawSurface->IsBound = EGL_FALSE;
if (oldDrawSurface->DeletePending) {
/* make sure we don't try to rebind a deleted surface */
if (draw == oldDrawSurface || draw == oldReadSurface) {
draw = NULL;
}
/* really delete surface now */
drv->API.DestroySurface(drv, dpy, oldDrawSurface->Handle);
}
}
if (oldReadSurface != NULL && oldReadSurface != oldDrawSurface) {
oldReadSurface->IsBound = EGL_FALSE;
if (oldReadSurface->DeletePending) {
/* make sure we don't try to rebind a deleted surface */
if (read == oldDrawSurface || read == oldReadSurface) {
read = NULL;
}
/* really delete surface now */
drv->API.DestroySurface(drv, dpy, oldReadSurface->Handle);
}
}
if (oldContext != NULL) {
oldContext->IsBound = EGL_FALSE;
if (oldContext->DeletePending) {
/* make sure we don't try to rebind a deleted context */
if (ctx == oldContext) {
ctx = NULL;
}
/* really delete context now */
drv->API.DestroyContext(drv, dpy, oldContext->Handle);
}
}
if (ctx) {
/* check read/draw again, in case we deleted them above */
if (draw == NULL || read == NULL) {
_eglError(EGL_BAD_MATCH, "eglMakeCurrent");
return EGL_FALSE;
}
ctx->DrawSurface = draw;
ctx->ReadSurface = read;
ctx->IsBound = EGL_TRUE;
draw->IsBound = EGL_TRUE;
read->IsBound = EGL_TRUE;
}
t->CurrentContext = ctx;
return EGL_TRUE;
}
/**
* Return the currently bound _EGLContext object, or NULL.
*/
_EGLContext *
_eglGetCurrentContext(void)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
return t->CurrentContext;
}
/**
* Returns the label set for the current thread.
*/
EGLLabelKHR
_eglGetThreadLabel(void)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
return t->Label;
}
/**
* Drivers will typically call this to do the error checking and
* update the various flags.
* Then, the driver will do its device-dependent Make-Current stuff.
*/
EGLBoolean
_eglMakeCurrent(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *draw,
_EGLSurface *read, _EGLContext *ctx)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
_EGLContext *oldContext = NULL;
_EGLSurface *oldDrawSurface = NULL;
_EGLSurface *oldReadSurface = NULL;
EGLint apiIndex;
if (_eglIsCurrentThreadDummy())
return _eglError(EGL_BAD_ALLOC, "eglMakeCurrent");
if (ctx) {
/* error checking */
if (ctx->Binding && ctx->Binding != t)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
if (draw == NULL || read == NULL)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
if (draw->Config != ctx->Config || read->Config != ctx->Config)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
if ((draw->Binding && draw->Binding->Binding != t) ||
(read->Binding && read->Binding->Binding != t))
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
#ifdef EGL_VERSION_1_4
/* OpenGL and OpenGL ES are conflicting */
switch (ctx->ClientAPI) {
case EGL_OPENGL_ES_API:
if (t->CurrentContexts[_eglConvertApiToIndex(EGL_OPENGL_API)])
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
break;
case EGL_OPENGL_API:
if (t->CurrentContexts[_eglConvertApiToIndex(EGL_OPENGL_ES_API)])
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
break;
default:
break;
}
#endif
apiIndex = _eglConvertApiToIndex(ctx->ClientAPI);
}
else {
if (draw != NULL || read != NULL)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
apiIndex = t->CurrentAPIIndex;
}
oldContext = t->CurrentContexts[apiIndex];
if (oldContext) {
oldDrawSurface = oldContext->DrawSurface;
oldReadSurface = oldContext->ReadSurface;
assert(oldDrawSurface);
assert(oldReadSurface);
/* break old bindings */
t->CurrentContexts[apiIndex] = NULL;
oldContext->Binding = NULL;
oldContext->DrawSurface = NULL;
oldContext->ReadSurface = NULL;
oldDrawSurface->Binding = NULL;
oldReadSurface->Binding = NULL;
/*
* check if the old context or surfaces need to be deleted
*/
if (!_eglIsSurfaceLinked(oldDrawSurface)) {
assert(draw != oldDrawSurface && read != oldDrawSurface);
drv->API.DestroySurface(drv, dpy, oldDrawSurface);
}
if (oldReadSurface != oldDrawSurface &&
!_eglIsSurfaceLinked(oldReadSurface)) {
assert(draw != oldReadSurface && read != oldReadSurface);
drv->API.DestroySurface(drv, dpy, oldReadSurface);
}
if (!_eglIsContextLinked(oldContext)) {
assert(ctx != oldContext);
drv->API.DestroyContext(drv, dpy, oldContext);
}
}
/* build new bindings */
if (ctx) {
t->CurrentContexts[apiIndex] = ctx;
ctx->Binding = t;
ctx->DrawSurface = draw;
ctx->ReadSurface = read;
draw->Binding = ctx;
read->Binding = ctx;
}
return EGL_TRUE;
}
/**
* Record EGL error code and return EGL_FALSE.
*/
static EGLBoolean
_eglInternalError(EGLint errCode, const char *msg)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
if (t == &dummy_thread)
return EGL_FALSE;
t->LastError = errCode;
if (errCode != EGL_SUCCESS) {
const char *s;
switch (errCode) {
case EGL_BAD_ACCESS:
s = "EGL_BAD_ACCESS";
break;
case EGL_BAD_ALLOC:
s = "EGL_BAD_ALLOC";
break;
case EGL_BAD_ATTRIBUTE:
s = "EGL_BAD_ATTRIBUTE";
break;
case EGL_BAD_CONFIG:
s = "EGL_BAD_CONFIG";
break;
case EGL_BAD_CONTEXT:
s = "EGL_BAD_CONTEXT";
break;
case EGL_BAD_CURRENT_SURFACE:
s = "EGL_BAD_CURRENT_SURFACE";
break;
case EGL_BAD_DISPLAY:
s = "EGL_BAD_DISPLAY";
break;
case EGL_BAD_MATCH:
s = "EGL_BAD_MATCH";
break;
case EGL_BAD_NATIVE_PIXMAP:
s = "EGL_BAD_NATIVE_PIXMAP";
break;
case EGL_BAD_NATIVE_WINDOW:
s = "EGL_BAD_NATIVE_WINDOW";
break;
case EGL_BAD_PARAMETER:
s = "EGL_BAD_PARAMETER";
break;
case EGL_BAD_SURFACE:
s = "EGL_BAD_SURFACE";
break;
case EGL_NOT_INITIALIZED:
s = "EGL_NOT_INITIALIZED";
break;
default:
s = "other EGL error";
}
_eglLog(_EGL_DEBUG, "EGL user error 0x%x (%s) in %s\n", errCode, s, msg);
}
return EGL_FALSE;
}
/**
* Record EGL error code and return EGL_FALSE.
*/
EGLBoolean
_eglError(EGLint errCode, const char *msg)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
if (t == &dummy_thread)
return EGL_FALSE;
t->LastError = errCode;
if (errCode != EGL_SUCCESS) {
const char *s;
switch (errCode) {
case EGL_BAD_ACCESS:
s = "EGL_BAD_ACCESS";
break;
case EGL_BAD_ALLOC:
s = "EGL_BAD_ALLOC";
break;
case EGL_BAD_ATTRIBUTE:
s = "EGL_BAD_ATTRIBUTE";
break;
case EGL_BAD_CONFIG:
s = "EGL_BAD_CONFIG";
break;
case EGL_BAD_CONTEXT:
s = "EGL_BAD_CONTEXT";
break;
case EGL_BAD_CURRENT_SURFACE:
s = "EGL_BAD_CURRENT_SURFACE";
break;
case EGL_BAD_DISPLAY:
s = "EGL_BAD_DISPLAY";
break;
case EGL_BAD_MATCH:
s = "EGL_BAD_MATCH";
break;
case EGL_BAD_NATIVE_PIXMAP:
s = "EGL_BAD_NATIVE_PIXMAP";
break;
case EGL_BAD_NATIVE_WINDOW:
s = "EGL_BAD_NATIVE_WINDOW";
break;
case EGL_BAD_PARAMETER:
s = "EGL_BAD_PARAMETER";
break;
case EGL_BAD_SURFACE:
s = "EGL_BAD_SURFACE";
break;
#ifdef EGL_MESA_screen_surface
case EGL_BAD_SCREEN_MESA:
s = "EGL_BAD_SCREEN_MESA";
break;
case EGL_BAD_MODE_MESA:
s = "EGL_BAD_MODE_MESA";
break;
#endif
default:
s = "other";
}
_eglLog(_EGL_DEBUG, "EGL user error 0x%x (%s) in %s\n", errCode, s, msg);
}
return EGL_FALSE;
}
/**
* Return the currently bound context of the current API, or NULL.
*/
_EGLContext *
_eglGetCurrentContext(void)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
return t->CurrentContexts[t->CurrentAPIIndex];
}
/**
* Return the currently bound context of the given API, or NULL.
*/
PUBLIC _EGLContext *
_eglGetAPIContext(EGLenum api)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
return t->CurrentContexts[_eglConvertApiToIndex(api)];
}
/**
* Return true if the given context and surfaces can be made current.
*/
static EGLBoolean
_eglCheckMakeCurrent(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read)
{
_EGLThreadInfo *t = _eglGetCurrentThread();
EGLint conflict_api;
if (_eglIsCurrentThreadDummy())
return _eglError(EGL_BAD_ALLOC, "eglMakeCurrent");
/* this is easy */
if (!ctx) {
if (draw || read)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
return EGL_TRUE;
}
/* ctx/draw/read must be all given */
if (draw == NULL || read == NULL)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
/* context stealing from another thread is not allowed */
if (ctx->Binding && ctx->Binding != t)
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
/*
* The spec says
*
* "If ctx is current to some other thread, or if either draw or read are
* bound to contexts in another thread, an EGL_BAD_ACCESS error is
* generated."
*
* But it also says
*
* "at most one context may be bound to a particular surface at a given
* time"
*
* The latter is more restrictive so we can check only the latter case.
*/
if ((draw->CurrentContext && draw->CurrentContext != ctx) ||
(read->CurrentContext && read->CurrentContext != ctx))
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
/* simply require the configs to be equal */
if (draw->Config != ctx->Config || read->Config != ctx->Config)
return _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
switch (ctx->ClientAPI) {
#ifdef EGL_VERSION_1_4
/* OpenGL and OpenGL ES are conflicting */
case EGL_OPENGL_ES_API:
conflict_api = EGL_OPENGL_API;
break;
case EGL_OPENGL_API:
conflict_api = EGL_OPENGL_ES_API;
break;
#endif
default:
conflict_api = -1;
break;
}
if (conflict_api >= 0 && _eglGetAPIContext(conflict_api))
return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
return EGL_TRUE;
}
