/*
** Make a context the current one for the GL (in this implementation, there
** is only one instance of the GL, and we use it to serve all GL clients by
** switching it between different contexts). While we are at it, look up
** a context by its tag and return its (__GLXcontext *).
*/
__GLXcontext *
__glXForceCurrent(__GLXclientState * cl, GLXContextTag tag, int *error)
{
__GLXcontext *cx;
/*
** See if the context tag is legal; it is managed by the extension,
** so if it's invalid, we have an implementation error.
*/
cx = __glXLookupContextByTag(cl, tag);
if (!cx) {
cl->client->errorValue = tag;
*error = __glXError(GLXBadContextTag);
return 0;
}
if (!cx->isDirect) {
if (cx->drawPriv == NULL) {
/*
** The drawable has vanished. It must be a window, because only
** windows can be destroyed from under us; GLX pixmaps are
** refcounted and don't go away until no one is using them.
*/
*error = __glXError(GLXBadCurrentWindow);
return 0;
}
}
if (cx->wait && (*cx->wait) (cx, cl, error))
return NULL;
if (cx == __glXLastContext && GET_DISPATCH()) {
/* No need to re-bind */
return cx;
}
/* Make this context the current one for the GL. */
if (!cx->isDirect) {
if (!(*cx->makeCurrent) (cx)) {
/* Bind failed, and set the error code. Bummer */
cl->client->errorValue = cx->id;
*error = __glXError(GLXBadContextState);
return 0;
}
}
__glXLastContext = cx;
return cx;
}
int __glXDispSwap_VendorPrivate(__GLXclientState *cl, GLbyte *pc)
{
xGLXVendorPrivateReq *req;
GLint vendorcode;
__GLXdispatchVendorPrivProcPtr proc;
__GLX_DECLARE_SWAP_VARIABLES;
req = (xGLXVendorPrivateReq *) pc;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->vendorCode);
vendorcode = req->vendorCode;
proc = (__GLXdispatchVendorPrivProcPtr)
__glXGetProtocolDecodeFunction(& VendorPriv_dispatch_info,
vendorcode, 1);
if (proc != NULL) {
(*proc)(cl, (GLbyte*)req);
return Success;
}
cl->client->errorValue = req->vendorCode;
return __glXError(GLXUnsupportedPrivateRequest);
}
int
DoSwapInterval(__GLXclientState * cl, GLbyte * pc, int do_swap)
{
xGLXVendorPrivateReq *const req = (xGLXVendorPrivateReq *) pc;
ClientPtr client = cl->client;
const GLXContextTag tag = req->contextTag;
__GLXcontext *cx;
GLint interval;
REQUEST_FIXED_SIZE(xGLXVendorPrivateReq, 4);
cx = __glXLookupContextByTag(cl, tag);
if ((cx == NULL) || (cx->pGlxScreen == NULL)) {
client->errorValue = tag;
return __glXError(GLXBadContext);
}
if (cx->pGlxScreen->swapInterval == NULL) {
LogMessage(X_ERROR, "AIGLX: cx->pGlxScreen->swapInterval == NULL\n");
client->errorValue = tag;
return __glXError(GLXUnsupportedPrivateRequest);
}
if (cx->drawPriv == NULL) {
client->errorValue = tag;
return BadValue;
}
pc += __GLX_VENDPRIV_HDR_SIZE;
interval = (do_swap)
? bswap_32(*(int *) (pc + 0))
: *(int *) (pc + 0);
if (interval <= 0)
return BadValue;
(void) (*cx->pGlxScreen->swapInterval) (cx->drawPriv, interval);
return Success;
}
/*
** Top level dispatcher; all commands are executed from here down.
*/
static int
__glXDispatch(ClientPtr client)
{
REQUEST(xGLXSingleReq);
CARD8 opcode;
__GLXdispatchSingleProcPtr proc;
__GLXclientState *cl;
int retval;
opcode = stuff->glxCode;
cl = glxGetClient(client);
/* Mark it in use so we suspend it on VT switch. */
cl->inUse = TRUE;
/*
** If we're expecting a glXRenderLarge request, this better be one.
*/
if ((cl->largeCmdRequestsSoFar != 0) && (opcode != X_GLXRenderLarge)) {
client->errorValue = stuff->glxCode;
return __glXError(GLXBadLargeRequest);
}
/* If we're currently blocking GLX clients, just put this guy to
* sleep, reset the request and return. */
if (glxBlockClients) {
ResetCurrentRequest(client);
client->sequence--;
IgnoreClient(client);
return Success;
}
/*
** Use the opcode to index into the procedure table.
*/
proc = __glXGetProtocolDecodeFunction(&Single_dispatch_info, opcode,
client->swapped);
if (proc != NULL) {
GLboolean rendering = opcode <= X_GLXRenderLarge;
__glXleaveServer(rendering);
retval = (*proc) (cl, (GLbyte *) stuff);
__glXenterServer(rendering);
}
else {
retval = BadRequest;
}
return retval;
}
int __glXDisp_UseXFont(__GLXclientState *cl, GLbyte *pc)
{
ClientPtr client = cl->client;
xGLXUseXFontReq *req;
FontPtr pFont;
GC *pGC;
GLuint currentListIndex;
__GLXcontext *cx;
int error;
req = (xGLXUseXFontReq *) pc;
cx = __glXForceCurrent(cl, req->contextTag, &error);
if (!cx) {
return error;
}
CALL_GetIntegerv( GET_DISPATCH(), (GL_LIST_INDEX, (GLint*) ¤tListIndex) );
if (currentListIndex != 0) {
/*
** A display list is currently being made. It is an error
** to try to make a font during another lists construction.
*/
client->errorValue = cx->id;
return __glXError(GLXBadContextState);
}
/*
** Font can actually be either the ID of a font or the ID of a GC
** containing a font.
*/
error = dixLookupResourceByType((pointer *)&pFont,
req->font, RT_FONT,
client, DixReadAccess);
if (error != Success) {
error = dixLookupResourceByType((pointer *)&pGC,
req->font, RT_GC,
client, DixReadAccess);
if (error != Success) {
client->errorValue = req->font;
return error == BadGC ? BadFont : error;
}
pFont = pGC->font;
}
return MakeBitmapsFromFont(pFont, req->first, req->count,
req->listBase);
}
int
__glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc)
{
ClientPtr client = cl->client;
xGLXCreateContextAttribsARBReq *req = (xGLXCreateContextAttribsARBReq *) pc;
int32_t *attribs = (req->numAttribs != 0) ? (int32_t *) (req + 1) : NULL;
unsigned i;
int major_version = 1;
int minor_version = 0;
uint32_t flags = 0;
uint32_t render_type = GLX_RGBA_TYPE;
__GLXcontext *ctx = NULL;
__GLXcontext *shareCtx = NULL;
__GLXscreen *glxScreen;
__GLXconfig *config;
int err;
/* The GLX_ARB_create_context_robustness spec says:
*
* "The default value for GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB
* is GLX_NO_RESET_NOTIFICATION_ARB."
*/
int reset = GLX_NO_RESET_NOTIFICATION_ARB;
/* The GLX_ARB_create_context_profile spec says:
*
* "The default value for GLX_CONTEXT_PROFILE_MASK_ARB is
* GLX_CONTEXT_CORE_PROFILE_BIT_ARB."
*
* The core profile only makes sense for OpenGL versions 3.2 and later.
* If the version ultimately specified is less than 3.2, the core profile
* bit is cleared (see below).
*/
int profile = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
/* Verify that the size of the packet matches the size inferred from the
* sizes specified for the various fields.
*/
const unsigned expected_size = (sz_xGLXCreateContextAttribsARBReq
+ (req->numAttribs * 8)) / 4;
if (req->length != expected_size)
return BadLength;
LEGAL_NEW_RESOURCE(req->context, client);
/* The GLX_ARB_create_context spec says:
*
* "* If <config> is not a valid GLXFBConfig, GLXBadFBConfig is
* generated."
*
* On the client, the screen comes from the FBConfig, so GLXBadFBConfig
* should be issued if the screen is nonsense.
*/
if (!validGlxScreen(client, req->screen, &glxScreen, &err))
return __glXError(GLXBadFBConfig);
if (!validGlxFBConfig(client, glxScreen, req->fbconfig, &config, &err))
return __glXError(GLXBadFBConfig);
/* Validate the context with which the new context should share resources.
*/
if (req->shareList != None) {
if (!validGlxContext(client, req->shareList, DixReadAccess,
&shareCtx, &err))
return err;
/* The crazy condition is because C doesn't have a logical XOR
* operator. Comparing directly for equality may fail if one is 1 and
* the other is 2 even though both are logically true.
*/
if (!!req->isDirect != !!shareCtx->isDirect) {
client->errorValue = req->shareList;
return BadMatch;
}
/* The GLX_ARB_create_context spec says:
*
* "* If the server context state for <share_context>...was
* created on a different screen than the one referenced by
* <config>...BadMatch is generated."
*/
if (glxScreen != shareCtx->pGlxScreen) {
client->errorValue = shareCtx->pGlxScreen->pScreen->myNum;
return BadMatch;
}
}
for (i = 0; i < req->numAttribs; i++) {
switch (attribs[i * 2]) {
case GLX_CONTEXT_MAJOR_VERSION_ARB:
major_version = attribs[2 * i + 1];
break;
case GLX_CONTEXT_MINOR_VERSION_ARB:
minor_version = attribs[2 * i + 1];
break;
case GLX_CONTEXT_FLAGS_ARB:
flags = attribs[2 * i + 1];
break;
case GLX_RENDER_TYPE:
render_type = attribs[2 * i + 1];
break;
case GLX_CONTEXT_PROFILE_MASK_ARB:
profile = attribs[2 * i + 1];
break;
case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
reset = attribs[2 * i + 1];
if (reset != GLX_NO_RESET_NOTIFICATION_ARB
&& reset != GLX_LOSE_CONTEXT_ON_RESET_ARB)
return BadValue;
break;
default:
return BadValue;
}
}
/* The GLX_ARB_create_context spec says:
*
* "If attributes GLX_CONTEXT_MAJOR_VERSION_ARB and
* GLX_CONTEXT_MINOR_VERSION_ARB, when considered together
* with attributes GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB and
* GLX_RENDER_TYPE, specify an OpenGL version and feature set
* that are not defined, BadMatch is generated.
*
* ...Feature deprecation was introduced with OpenGL 3.0, so
* forward-compatible contexts may only be requested for
* OpenGL 3.0 and above. Thus, examples of invalid
* combinations of attributes include:
*
* - Major version < 1 or > 3
* - Major version == 1 and minor version < 0 or > 5
* - Major version == 2 and minor version < 0 or > 1
* - Major version == 3 and minor version > 2
* - Forward-compatible flag set and major version < 3
* - Color index rendering and major version >= 3"
*/
if (!validate_GL_version(major_version, minor_version))
return BadMatch;
if (major_version < 3
&& ((flags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) != 0))
return BadMatch;
if (major_version >= 3 && render_type == GLX_COLOR_INDEX_TYPE)
return BadMatch;
if (!validate_render_type(render_type))
return BadValue;
if ((flags & ~ALL_VALID_FLAGS) != 0)
return BadValue;
/* The GLX_ARB_create_context_profile spec says:
*
* "* If attribute GLX_CONTEXT_PROFILE_MASK_ARB has no bits set; has
* any bits set other than GLX_CONTEXT_CORE_PROFILE_BIT_ARB and
* GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB; has more than one of
* these bits set; or if the implementation does not support the
* requested profile, then GLXBadProfileARB is generated."
*/
switch (profile) {
case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
break;
case GLX_CONTEXT_ES2_PROFILE_BIT_EXT:
/* The GLX_EXT_create_context_es2_profile spec says:
*
* "... If the version requested is 2.0, and the
* GLX_CONTEXT_ES2_PROFILE_BIT_EXT bit is set in the
* GLX_CONTEXT_PROFILE_MASK_ARB attribute (see below), then the
* context returned will implement OpenGL ES 2.0."
*
* It also says:
*
* "* If attribute GLX_CONTEXT_PROFILE_MASK_ARB has no bits set;
* has any bits set other than
* GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
* GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, or
* GLX_CONTEXT_ES2_PROFILE_BIT_EXT; has more than one of these
* bits set; or if the implementation does not supported the
* requested profile, then GLXBadProfileARB is generated."
*
* It does not specifically say what is supposed to happen if
* GLX_CONTEXT_ES2_PROFILE_BIT_EXT is set but the version requested is
* not 2.0. We choose to generate GLXBadProfileARB as this matches
* NVIDIA's behavior.
*/
if (major_version != 2 || minor_version != 0)
return __glXError(GLXBadProfileARB);
break;
default:
return __glXError(GLXBadProfileARB);
}
/* The GLX_ARB_create_context_robustness spec says:
*
* "* If the reset notification behavior of <share_context> and the
* newly created context are different, BadMatch is generated."
*/
if (shareCtx != NULL && shareCtx->resetNotificationStrategy != reset)
return BadMatch;
/* There is no GLX protocol for desktop OpenGL versions after 1.4. There
* is no GLX protocol for any version of OpenGL ES. If the application is
* requested an indirect rendering context for a version that cannot be
* satisfied, reject it.
*
* The GLX_ARB_create_context spec says:
*
* "* If <config> does not support compatible OpenGL contexts
* providing the requested API major and minor version,
* forward-compatible flag, and debug context flag, GLXBadFBConfig
* is generated."
*/
if (!req->isDirect && (major_version > 1 || minor_version > 4
|| profile == GLX_CONTEXT_ES2_PROFILE_BIT_EXT)) {
return __glXError(GLXBadFBConfig);
}
/* Allocate memory for the new context
*/
if (req->isDirect) {
ctx = __glXdirectContextCreate(glxScreen, config, shareCtx);
err = BadAlloc;
}
else {
ctx = glxScreen->createContext(glxScreen, config, shareCtx,
req->numAttribs, (uint32_t *) attribs,
&err);
}
if (ctx == NULL)
return err;
ctx->pGlxScreen = glxScreen;
ctx->config = config;
ctx->id = req->context;
ctx->share_id = req->shareList;
ctx->idExists = True;
ctx->isCurrent = False;
ctx->isDirect = req->isDirect;
ctx->hasUnflushedCommands = False;
ctx->renderMode = GL_RENDER;
ctx->feedbackBuf = NULL;
ctx->feedbackBufSize = 0;
ctx->selectBuf = NULL;
ctx->selectBufSize = 0;
ctx->drawPriv = NULL;
ctx->readPriv = NULL;
ctx->resetNotificationStrategy = reset;
/* Add the new context to the various global tables of GLX contexts.
*/
if (!__glXAddContext(ctx)) {
(*ctx->destroy) (ctx);
client->errorValue = req->context;
return BadAlloc;
}
return Success;
}
