/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
/**
* \file glxext.c
* GLX protocol interface boot-strap code.
*
* Direct rendering support added by Precision Insight, Inc.
*
* \author Kevin E. Martin <kevin@precisioninsight.com>
*/
#include <assert.h>
#include "glxclient.h"
#include <X11/extensions/Xext.h>
#include <X11/extensions/extutil.h>
#ifdef GLX_USE_APPLEGL
#include "apple_glx.h"
#include "apple_visual.h"
#endif
#include "glxextensions.h"
#ifdef USE_XCB
#include <X11/Xlib-xcb.h>
#include <xcb/xcb.h>
#include <xcb/glx.h>
#endif
#ifdef DEBUG
void __glXDumpDrawBuffer(struct glx_context * ctx);
#endif
/*
** You can set this cell to 1 to force the gl drawing stuff to be
** one command per packet
*/
_X_HIDDEN int __glXDebug = 0;
/* Extension required boiler plate */
static const char __glXExtensionName[] = GLX_EXTENSION_NAME;
static struct glx_display *glx_displays;
static /* const */ char *error_list[] = {
"GLXBadContext",
"GLXBadContextState",
"GLXBadDrawable",
"GLXBadPixmap",
"GLXBadContextTag",
"GLXBadCurrentWindow",
"GLXBadRenderRequest",
"GLXBadLargeRequest",
"GLXUnsupportedPrivateRequest",
"GLXBadFBConfig",
"GLXBadPbuffer",
"GLXBadCurrentDrawable",
"GLXBadWindow",
"GLXBadProfileARB",
};
#ifdef GLX_USE_APPLEGL
static char *__glXErrorString(Display *dpy, int code, XExtCodes *codes,
char *buf, int n);
#endif
static
XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
__GLX_NUMBER_ERRORS, error_list)
/*
* GLX events are a bit funky. We don't stuff the X event code into
* our user exposed (via XNextEvent) structure. Instead we use the GLX
* private event code namespace (and hope it doesn't conflict). Clients
* have to know that bit 15 in the event type field means they're getting
* a GLX event, and then handle the various sub-event types there, rather
* than simply checking the event code and handling it directly.
*/
static Bool
__glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
{
struct glx_display *glx_dpy = __glXInitialize(dpy);
if (glx_dpy == NULL)
return False;
switch ((wire->u.u.type & 0x7f) - glx_dpy->codes->first_event) {
case GLX_PbufferClobber:
{
GLXPbufferClobberEvent *aevent = (GLXPbufferClobberEvent *)event;
xGLXPbufferClobberEvent *awire = (xGLXPbufferClobberEvent *)wire;
aevent->event_type = awire->type;
aevent->serial = awire->sequenceNumber;
aevent->event_type = awire->event_type;
aevent->draw_type = awire->draw_type;
aevent->drawable = awire->drawable;
aevent->buffer_mask = awire->buffer_mask;
aevent->aux_buffer = awire->aux_buffer;
aevent->x = awire->x;
aevent->y = awire->y;
aevent->width = awire->width;
aevent->height = awire->height;
aevent->count = awire->count;
return True;
}
case GLX_BufferSwapComplete:
{
GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
xGLXBufferSwapComplete2 *awire = (xGLXBufferSwapComplete2 *)wire;
struct glx_drawable *glxDraw = GetGLXDrawable(dpy, awire->drawable);
aevent->event_type = awire->event_type;
aevent->drawable = awire->drawable;
aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
if (!glxDraw)
return False;
if (awire->sbc < glxDraw->lastEventSbc)
glxDraw->eventSbcWrap += 0x100000000;
glxDraw->lastEventSbc = awire->sbc;
aevent->sbc = awire->sbc + glxDraw->eventSbcWrap;
return True;
}
default:
/* client doesn't support server event */
break;
}
return False;
}
/* We don't actually support this. It doesn't make sense for clients to
* send each other GLX events.
*/
static Status
__glXEventToWire(Display *dpy, XEvent *event, xEvent *wire)
{
struct glx_display *glx_dpy = __glXInitialize(dpy);
if (glx_dpy == NULL)
return False;
switch (event->type) {
case GLX_DAMAGED:
break;
case GLX_SAVED:
break;
case GLX_EXCHANGE_COMPLETE_INTEL:
break;
case GLX_COPY_COMPLETE_INTEL:
break;
case GLX_FLIP_COMPLETE_INTEL:
break;
default:
/* client doesn't support server event */
break;
}
return Success;
}
/************************************************************************/
/*
** Free the per screen configs data as well as the array of
** __glXScreenConfigs.
*/
static void
FreeScreenConfigs(struct glx_display * priv)
{
struct glx_screen *psc;
GLint i, screens;
/* Free screen configuration information */
screens = ScreenCount(priv->dpy);
for (i = 0; i < screens; i++) {
psc = priv->screens[i];
glx_screen_cleanup(psc);
#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
if (psc->driScreen) {
psc->driScreen->destroyScreen(psc);
} else {
Xfree(psc);
}
#else
Xfree(psc);
#endif
}
XFree((char *) priv->screens);
priv->screens = NULL;
}
static void
glx_display_free(struct glx_display *priv)
{
struct glx_context *gc;
gc = __glXGetCurrentContext();
if (priv->dpy == gc->currentDpy) {
gc->vtable->destroy(gc);
__glXSetCurrentContextNull();
}
FreeScreenConfigs(priv);
if (priv->serverGLXvendor)
Xfree((char *) priv->serverGLXvendor);
if (priv->serverGLXversion)
Xfree((char *) priv->serverGLXversion);
__glxHashDestroy(priv->glXDrawHash);
#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
__glxHashDestroy(priv->drawHash);
/* Free the direct rendering per display data */
if (priv->driswDisplay)
(*priv->driswDisplay->destroyDisplay) (priv->driswDisplay);
priv->driswDisplay = NULL;
if (priv->driDisplay)
(*priv->driDisplay->destroyDisplay) (priv->driDisplay);
priv->driDisplay = NULL;
if (priv->dri2Display)
(*priv->dri2Display->destroyDisplay) (priv->dri2Display);
priv->dri2Display = NULL;
#endif
Xfree((char *) priv);
}
static int
__glXCloseDisplay(Display * dpy, XExtCodes * codes)
{
struct glx_display *priv, **prev;
_XLockMutex(_Xglobal_lock);
prev = &glx_displays;
for (priv = glx_displays; priv; prev = &priv->next, priv = priv->next) {
if (priv->dpy == dpy) {
*prev = priv->next;
break;
}
}
_XUnlockMutex(_Xglobal_lock);
glx_display_free(priv);
return 1;
}
/*
** Query the version of the GLX extension. This procedure works even if
** the client extension is not completely set up.
*/
static Bool
QueryVersion(Display * dpy, int opcode, int *major, int *minor)
{
#ifdef USE_XCB
xcb_connection_t *c = XGetXCBConnection(dpy);
xcb_glx_query_version_reply_t *reply = xcb_glx_query_version_reply(c,
xcb_glx_query_version
(c,
GLX_MAJOR_VERSION,
GLX_MINOR_VERSION),
NULL);
if (!reply)
return GL_FALSE;
if (reply->major_version != GLX_MAJOR_VERSION) {
free(reply);
return GL_FALSE;
}
*major = reply->major_version;
*minor = min(reply->minor_version, GLX_MINOR_VERSION);
free(reply);
return GL_TRUE;
#else
xGLXQueryVersionReq *req;
xGLXQueryVersionReply reply;
/* Send the glXQueryVersion request */
LockDisplay(dpy);
GetReq(GLXQueryVersion, req);
req->reqType = opcode;
req->glxCode = X_GLXQueryVersion;
req->majorVersion = GLX_MAJOR_VERSION;
req->minorVersion = GLX_MINOR_VERSION;
_XReply(dpy, (xReply *) & reply, 0, False);
UnlockDisplay(dpy);
SyncHandle();
if (reply.majorVersion != GLX_MAJOR_VERSION) {
/*
** The server does not support the same major release as this
** client.
*/
return GL_FALSE;
}
*major = reply.majorVersion;
*minor = min(reply.minorVersion, GLX_MINOR_VERSION);
return GL_TRUE;
#endif /* USE_XCB */
}
/*
* We don't want to enable this GLX_OML_swap_method in glxext.h,
* because we can't support it. The X server writes it out though,
* so we should handle it somehow, to avoid false warnings.
*/
enum {
IGNORE_GLX_SWAP_METHOD_OML = 0x8060
};
static GLint
convert_from_x_visual_type(int visualType)
{
static const int glx_visual_types[] = {
GLX_STATIC_GRAY, GLX_GRAY_SCALE,
GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
GLX_TRUE_COLOR, GLX_DIRECT_COLOR
};
if (visualType < ARRAY_SIZE(glx_visual_types))
return glx_visual_types[visualType];
return GLX_NONE;
}
/*
* getVisualConfigs uses the !tagged_only path.
* getFBConfigs uses the tagged_only path.
*/
_X_HIDDEN void
__glXInitializeVisualConfigFromTags(struct glx_config * config, int count,
const INT32 * bp, Bool tagged_only,
Bool fbconfig_style_tags)
{
int i;
if (!tagged_only) {
/* Copy in the first set of properties */
config->visualID = *bp++;
config->visualType = convert_from_x_visual_type(*bp++);
config->rgbMode = *bp++;
config->redBits = *bp++;
config->greenBits = *bp++;
config->blueBits = *bp++;
config->alphaBits = *bp++;
config->accumRedBits = *bp++;
config->accumGreenBits = *bp++;
config->accumBlueBits = *bp++;
config->accumAlphaBits = *bp++;
config->doubleBufferMode = *bp++;
config->stereoMode = *bp++;
config->rgbBits = *bp++;
config->depthBits = *bp++;
config->stencilBits = *bp++;
config->numAuxBuffers = *bp++;
config->level = *bp++;
#ifdef GLX_USE_APPLEGL
/* AppleSGLX supports pixmap and pbuffers with all config. */
config->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
/* Unfortunately this can create an ABI compatibility problem. */
count -= 18;
#else
count -= __GLX_MIN_CONFIG_PROPS;
#endif
}
config->sRGBCapable = GL_FALSE;
/*
** Additional properties may be in a list at the end
** of the reply. They are in pairs of property type
** and property value.
*/
#define FETCH_OR_SET(tag) \
config-> tag = ( fbconfig_style_tags ) ? *bp++ : 1
for (i = 0; i < count; i += 2) {
long int tag = *bp++;
switch (tag) {
case GLX_RGBA:
FETCH_OR_SET(rgbMode);
break;
case GLX_BUFFER_SIZE:
config->rgbBits = *bp++;
break;
case GLX_LEVEL:
config->level = *bp++;
break;
case GLX_DOUBLEBUFFER:
FETCH_OR_SET(doubleBufferMode);
break;
case GLX_STEREO:
FETCH_OR_SET(stereoMode);
break;
case GLX_AUX_BUFFERS:
config->numAuxBuffers = *bp++;
break;
case GLX_RED_SIZE:
config->redBits = *bp++;
break;
case GLX_GREEN_SIZE:
config->greenBits = *bp++;
break;
case GLX_BLUE_SIZE:
config->blueBits = *bp++;
break;
case GLX_ALPHA_SIZE:
config->alphaBits = *bp++;
break;
case GLX_DEPTH_SIZE:
config->depthBits = *bp++;
break;
case GLX_STENCIL_SIZE:
config->stencilBits = *bp++;
break;
case GLX_ACCUM_RED_SIZE:
config->accumRedBits = *bp++;
break;
case GLX_ACCUM_GREEN_SIZE:
config->accumGreenBits = *bp++;
break;
case GLX_ACCUM_BLUE_SIZE:
config->accumBlueBits = *bp++;
break;
case GLX_ACCUM_ALPHA_SIZE:
config->accumAlphaBits = *bp++;
break;
case GLX_VISUAL_CAVEAT_EXT:
config->visualRating = *bp++;
break;
case GLX_X_VISUAL_TYPE:
config->visualType = *bp++;
break;
case GLX_TRANSPARENT_TYPE:
config->transparentPixel = *bp++;
break;
case GLX_TRANSPARENT_INDEX_VALUE:
config->transparentIndex = *bp++;
break;
case GLX_TRANSPARENT_RED_VALUE:
config->transparentRed = *bp++;
break;
case GLX_TRANSPARENT_GREEN_VALUE:
config->transparentGreen = *bp++;
break;
case GLX_TRANSPARENT_BLUE_VALUE:
config->transparentBlue = *bp++;
break;
case GLX_TRANSPARENT_ALPHA_VALUE:
config->transparentAlpha = *bp++;
break;
case GLX_VISUAL_ID:
config->visualID = *bp++;
break;
case GLX_DRAWABLE_TYPE:
config->drawableType = *bp++;
#ifdef GLX_USE_APPLEGL
/* AppleSGLX supports pixmap and pbuffers with all config. */
config->drawableType |= GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
#endif
break;
case GLX_RENDER_TYPE:
config->renderType = *bp++;
break;
case GLX_X_RENDERABLE:
config->xRenderable = *bp++;
break;
case GLX_FBCONFIG_ID:
config->fbconfigID = *bp++;
break;
case GLX_MAX_PBUFFER_WIDTH:
config->maxPbufferWidth = *bp++;
break;
case GLX_MAX_PBUFFER_HEIGHT:
config->maxPbufferHeight = *bp++;
break;
case GLX_MAX_PBUFFER_PIXELS:
config->maxPbufferPixels = *bp++;
break;
#ifndef GLX_USE_APPLEGL
case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
config->optimalPbufferWidth = *bp++;
break;
case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
config->optimalPbufferHeight = *bp++;
break;
case GLX_VISUAL_SELECT_GROUP_SGIX:
config->visualSelectGroup = *bp++;
break;
case GLX_SWAP_METHOD_OML:
config->swapMethod = *bp++;
break;
#endif
case GLX_SAMPLE_BUFFERS_SGIS:
config->sampleBuffers = *bp++;
break;
case GLX_SAMPLES_SGIS:
config->samples = *bp++;
break;
#ifdef GLX_USE_APPLEGL
case IGNORE_GLX_SWAP_METHOD_OML:
/* We ignore this tag. See the comment above this function. */
++bp;
break;
#else
case GLX_BIND_TO_TEXTURE_RGB_EXT:
config->bindToTextureRgb = *bp++;
break;
case GLX_BIND_TO_TEXTURE_RGBA_EXT:
config->bindToTextureRgba = *bp++;
break;
case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
config->bindToMipmapTexture = *bp++;
break;
case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
config->bindToTextureTargets = *bp++;
break;
case GLX_Y_INVERTED_EXT:
config->yInverted = *bp++;
break;
#endif
case GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:
config->sRGBCapable = *bp++;
break;
case GLX_USE_GL:
if (fbconfig_style_tags)
bp++;
break;
case None:
i = count;
break;
default:
if(getenv("LIBGL_DIAGNOSTIC")) {
long int tagvalue = *bp++;
fprintf(stderr, "WARNING: unknown GLX tag from server: "
"tag 0x%lx value 0x%lx\n", tag, tagvalue);
} else {
/* Ignore the unrecognized tag's value */
bp++;
}
break;
}
}
config->renderType =
(config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
}
static struct glx_config *
createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
int screen, GLboolean tagged_only)
{
INT32 buf[__GLX_TOTAL_CONFIG], *props;
unsigned prop_size;
struct glx_config *modes, *m;
int i;
if (nprops == 0)
return NULL;
/* FIXME: Is the __GLX_MIN_CONFIG_PROPS test correct for FBconfigs? */
/* Check number of properties */
if (nprops < __GLX_MIN_CONFIG_PROPS || nprops > __GLX_MAX_CONFIG_PROPS)
return NULL;
/* Allocate memory for our config structure */
modes = glx_config_create_list(nvisuals);
if (!modes)
return NULL;
prop_size = nprops * __GLX_SIZE_INT32;
if (prop_size <= sizeof(buf))
props = buf;
else
props = Xmalloc(prop_size);
/* Read each config structure and convert it into our format */
m = modes;
for (i = 0; i < nvisuals; i++) {
_XRead(dpy, (char *) props, prop_size);
#ifdef GLX_USE_APPLEGL
/* Older X servers don't send this so we default it here. */
m->drawableType = GLX_WINDOW_BIT;
#else
/*
* The XQuartz 2.3.2.1 X server doesn't set this properly, so
* set the proper bits here.
* AppleSGLX supports windows, pixmaps, and pbuffers with all config.
*/
m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
#endif
__glXInitializeVisualConfigFromTags(m, nprops, props,
tagged_only, GL_TRUE);
m->screen = screen;
m = m->next;
}
if (props != buf)
Xfree(props);
return modes;
}
static GLboolean
getVisualConfigs(struct glx_screen *psc,
struct glx_display *priv, int screen)
{
xGLXGetVisualConfigsReq *req;
xGLXGetVisualConfigsReply reply;
Display *dpy = priv->dpy;
LockDisplay(dpy);
psc->visuals = NULL;
GetReq(GLXGetVisualConfigs, req);
req->reqType = priv->majorOpcode;
req->glxCode = X_GLXGetVisualConfigs;
req->screen = screen;
if (!_XReply(dpy, (xReply *) & reply, 0, False))
goto out;
psc->visuals = createConfigsFromProperties(dpy,
reply.numVisuals,
reply.numProps,
screen, GL_FALSE);
out:
UnlockDisplay(dpy);
return psc->visuals != NULL;
}
static GLboolean
getFBConfigs(struct glx_screen *psc, struct glx_display *priv, int screen)
{
xGLXGetFBConfigsReq *fb_req;
xGLXGetFBConfigsSGIXReq *sgi_req;
xGLXVendorPrivateWithReplyReq *vpreq;
xGLXGetFBConfigsReply reply;
Display *dpy = priv->dpy;
psc->serverGLXexts =
__glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
LockDisplay(dpy);
psc->configs = NULL;
if (atof(priv->serverGLXversion) >= 1.3) {
GetReq(GLXGetFBConfigs, fb_req);
fb_req->reqType = priv->majorOpcode;
fb_req->glxCode = X_GLXGetFBConfigs;
fb_req->screen = screen;
}
else if (strstr(psc->serverGLXexts, "GLX_SGIX_fbconfig") != NULL) {
GetReqExtra(GLXVendorPrivateWithReply,
sz_xGLXGetFBConfigsSGIXReq -
sz_xGLXVendorPrivateWithReplyReq, vpreq);
sgi_req = (xGLXGetFBConfigsSGIXReq *) vpreq;
sgi_req->reqType = priv->majorOpcode;
sgi_req->glxCode = X_GLXVendorPrivateWithReply;
sgi_req->vendorCode = X_GLXvop_GetFBConfigsSGIX;
sgi_req->screen = screen;
}
else
goto out;
if (!_XReply(dpy, (xReply *) & reply, 0, False))
goto out;
psc->configs = createConfigsFromProperties(dpy,
reply.numFBConfigs,
reply.numAttribs * 2,
screen, GL_TRUE);
out:
UnlockDisplay(dpy);
return psc->configs != NULL;
}
_X_HIDDEN Bool
glx_screen_init(struct glx_screen *psc,
int screen, struct glx_display * priv)
{
/* Initialize per screen dynamic client GLX extensions */
psc->ext_list_first_time = GL_TRUE;
psc->scr = screen;
psc->dpy = priv->dpy;
psc->display = priv;
getVisualConfigs(psc, priv, screen);
getFBConfigs(psc, priv, screen);
return GL_TRUE;
}
_X_HIDDEN void
glx_screen_cleanup(struct glx_screen *psc)
{
if (psc->configs) {
glx_config_destroy_list(psc->configs);
if (psc->effectiveGLXexts)
Xfree(psc->effectiveGLXexts);
psc->configs = NULL; /* NOTE: just for paranoia */
}
if (psc->visuals) {
glx_config_destroy_list(psc->visuals);
psc->visuals = NULL; /* NOTE: just for paranoia */
}
Xfree((char *) psc->serverGLXexts);
}
/*
** Allocate the memory for the per screen configs for each screen.
** If that works then fetch the per screen configs data.
*/
static Bool
AllocAndFetchScreenConfigs(Display * dpy, struct glx_display * priv)
{
struct glx_screen *psc;
GLint i, screens;
/*
** First allocate memory for the array of per screen configs.
*/
screens = ScreenCount(dpy);
priv->screens = Xmalloc(screens * sizeof *priv->screens);
if (!priv->screens)
return GL_FALSE;
priv->serverGLXversion =
__glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
if (priv->serverGLXversion == NULL) {
FreeScreenConfigs(priv);
return GL_FALSE;
}
for (i = 0; i < screens; i++, psc++) {
psc = NULL;
#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
if (priv->dri2Display)
psc = (*priv->dri2Display->createScreen) (i, priv);
if (psc == NULL && priv->driDisplay)
psc = (*priv->driDisplay->createScreen) (i, priv);
if (psc == NULL && priv->driswDisplay)
psc = (*priv->driswDisplay->createScreen) (i, priv);
#endif
#if defined(GLX_USE_APPLEGL)
if (psc == NULL)
psc = applegl_create_screen(i, priv);
#else
if (psc == NULL)
psc = indirect_create_screen(i, priv);
#endif
priv->screens[i] = psc;
}
SyncHandle();
return GL_TRUE;
}
/*
** Initialize the client side extension code.
*/
_X_HIDDEN struct glx_display *
__glXInitialize(Display * dpy)
{
struct glx_display *dpyPriv, *d;
#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
Bool glx_direct, glx_accel;
#endif
int i;
_XLockMutex(_Xglobal_lock);
for (dpyPriv = glx_displays; dpyPriv; dpyPriv = dpyPriv->next) {
if (dpyPriv->dpy == dpy) {
_XUnlockMutex(_Xglobal_lock);
return dpyPriv;
}
}
/* Drop the lock while we create the display private. */
_XUnlockMutex(_Xglobal_lock);
dpyPriv = Xcalloc(1, sizeof *dpyPriv);
if (!dpyPriv)
return NULL;
dpyPriv->codes = XInitExtension(dpy, __glXExtensionName);
if (!dpyPriv->codes) {
Xfree(dpyPriv);
_XUnlockMutex(_Xglobal_lock);
return NULL;
}
dpyPriv->dpy = dpy;
dpyPriv->majorOpcode = dpyPriv->codes->major_opcode;
dpyPriv->serverGLXvendor = 0x0;
dpyPriv->serverGLXversion = 0x0;
/* See if the versions are compatible. This GLX implementation does not
* work with servers that only support GLX 1.0.
*/
if (!QueryVersion(dpy, dpyPriv->majorOpcode,
&dpyPriv->majorVersion, &dpyPriv->minorVersion)
|| (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion < 1)) {
Xfree(dpyPriv);
_XUnlockMutex(_Xglobal_lock);
return NULL;
}
for (i = 0; i < __GLX_NUMBER_EVENTS; i++) {
XESetWireToEvent(dpy, dpyPriv->codes->first_event + i, __glXWireToEvent);
XESetEventToWire(dpy, dpyPriv->codes->first_event + i, __glXEventToWire);
}
XESetCloseDisplay(dpy, dpyPriv->codes->extension, __glXCloseDisplay);
XESetErrorString (dpy, dpyPriv->codes->extension,__glXErrorString);
dpyPriv->glXDrawHash = __glxHashCreate();
#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
dpyPriv->drawHash = __glxHashCreate();
/*
** Initialize the direct rendering per display data and functions.
** Note: This _must_ be done before calling any other DRI routines
** (e.g., those called in AllocAndFetchScreenConfigs).
*/
if (glx_direct && glx_accel) {
dpyPriv->dri2Display = dri2CreateDisplay(dpy);
dpyPriv->driDisplay = driCreateDisplay(dpy);
}
if (glx_direct)
dpyPriv->driswDisplay = driswCreateDisplay(dpy);
#endif
#ifdef GLX_USE_APPLEGL
if (!applegl_create_display(dpyPriv)) {
Xfree(dpyPriv);
return NULL;
}
#endif
if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
Xfree(dpyPriv);
return NULL;
}
#ifdef USE_XCB
__glX_send_client_info(dpyPriv);
#else
__glXClientInfo(dpy, dpyPriv->majorOpcode);
#endif
/* Grab the lock again and add the dispay private, unless somebody
* beat us to initializing on this display in the meantime. */
_XLockMutex(_Xglobal_lock);
for (d = glx_displays; d; d = d->next) {
if (d->dpy == dpy) {
_XUnlockMutex(_Xglobal_lock);
glx_display_free(dpyPriv);
return d;
}
}
dpyPriv->next = glx_displays;
glx_displays = dpyPriv;
_XUnlockMutex(_Xglobal_lock);
return dpyPriv;
}
/*
** Setup for sending a GLX command on dpy. Make sure the extension is
** initialized. Try to avoid calling __glXInitialize as its kinda slow.
*/
_X_HIDDEN CARD8
__glXSetupForCommand(Display * dpy)
{
struct glx_context *gc;
struct glx_display *priv;
/* If this thread has a current context, flush its rendering commands */
gc = __glXGetCurrentContext();
if (gc->currentDpy) {
/* Flush rendering buffer of the current context, if any */
(void) __glXFlushRenderBuffer(gc, gc->pc);
if (gc->currentDpy == dpy) {
/* Use opcode from gc because its right */
return gc->majorOpcode;
}
else {
/*
** Have to get info about argument dpy because it might be to
** a different server
*/
}
}
/* Forced to lookup extension via the slow initialize route */
priv = __glXInitialize(dpy);
if (!priv) {
return 0;
}
return priv->majorOpcode;
}
/**
* Flush the drawing command transport buffer.
*
* \param ctx Context whose transport buffer is to be flushed.
* \param pc Pointer to first unused buffer location.
*
* \todo
* Modify this function to use \c ctx->pc instead of the explicit
* \c pc parameter.
*/
_X_HIDDEN GLubyte *
__glXFlushRenderBuffer(struct glx_context * ctx, GLubyte * pc)
{
Display *const dpy = ctx->currentDpy;
#ifdef USE_XCB
xcb_connection_t *c = XGetXCBConnection(dpy);
#else
xGLXRenderReq *req;
#endif /* USE_XCB */
const GLint size = pc - ctx->buf;
if ((dpy != NULL) && (size > 0)) {
#ifdef USE_XCB
xcb_glx_render(c, ctx->currentContextTag, size,
(const uint8_t *) ctx->buf);
#else
/* Send the entire buffer as an X request */
LockDisplay(dpy);
GetReq(GLXRender, req);
req->reqType = ctx->majorOpcode;
req->glxCode = X_GLXRender;
req->contextTag = ctx->currentContextTag;
req->length += (size + 3) >> 2;
_XSend(dpy, (char *) ctx->buf, size);
UnlockDisplay(dpy);
SyncHandle();
#endif
}
/* Reset pointer and return it */
ctx->pc = ctx->buf;
return ctx->pc;
}
/**
* Send a portion of a GLXRenderLarge command to the server. The advantage of
* this function over \c __glXSendLargeCommand is that callers can use the
* data buffer in the GLX context and may be able to avoid allocating an
* extra buffer. The disadvantage is the clients will have to do more
* GLX protocol work (i.e., calculating \c totalRequests, etc.).
*
* \sa __glXSendLargeCommand
*
* \param gc GLX context
* \param requestNumber Which part of the whole command is this? The first
* request is 1.
* \param totalRequests How many requests will there be?
* \param data Command data.
* \param dataLen Size, in bytes, of the command data.
*/
_X_HIDDEN void
__glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
GLint totalRequests, const GLvoid * data, GLint dataLen)
{
Display *dpy = gc->currentDpy;
#ifdef USE_XCB
xcb_connection_t *c = XGetXCBConnection(dpy);
xcb_glx_render_large(c, gc->currentContextTag, requestNumber,
totalRequests, dataLen, data);
#else
xGLXRenderLargeReq *req;
if (requestNumber == 1) {
LockDisplay(dpy);
}
GetReq(GLXRenderLarge, req);
req->reqType = gc->majorOpcode;
req->glxCode = X_GLXRenderLarge;
req->contextTag = gc->currentContextTag;
req->length += (dataLen + 3) >> 2;
req->requestNumber = requestNumber;
req->requestTotal = totalRequests;
req->dataBytes = dataLen;
Data(dpy, data, dataLen);
if (requestNumber == totalRequests) {
UnlockDisplay(dpy);
SyncHandle();
}
#endif /* USE_XCB */
}
/**
* Send a command that is too large for the GLXRender protocol request.
*
* Send a large command, one that is too large for some reason to
* send using the GLXRender protocol request. One reason to send
* a large command is to avoid copying the data.
*
* \param ctx GLX context
* \param header Header data.
* \param headerLen Size, in bytes, of the header data. It is assumed that
* the header data will always be small enough to fit in
* a single X protocol packet.
* \param data Command data.
* \param dataLen Size, in bytes, of the command data.
*/
_X_HIDDEN void
__glXSendLargeCommand(struct glx_context * ctx,
const GLvoid * header, GLint headerLen,
const GLvoid * data, GLint dataLen)
{
GLint maxSize;
GLint totalRequests, requestNumber;
/*
** Calculate the maximum amount of data can be stuffed into a single
** packet. sz_xGLXRenderReq is added because bufSize is the maximum
** packet size minus sz_xGLXRenderReq.
*/
maxSize = (ctx->bufSize + sz_xGLXRenderReq) - sz_xGLXRenderLargeReq;
totalRequests = 1 + (dataLen / maxSize);
if (dataLen % maxSize)
totalRequests++;
/*
** Send all of the command, except the large array, as one request.
*/
assert(headerLen <= maxSize);
__glXSendLargeChunk(ctx, 1, totalRequests, header, headerLen);
/*
** Send enough requests until the whole array is sent.
*/
for (requestNumber = 2; requestNumber <= (totalRequests - 1);
requestNumber++) {
__glXSendLargeChunk(ctx, requestNumber, totalRequests, data, maxSize);
data = (const GLvoid *) (((const GLubyte *) data) + maxSize);
dataLen -= maxSize;
assert(dataLen > 0);
}
assert(dataLen <= maxSize);
__glXSendLargeChunk(ctx, requestNumber, totalRequests, data, dataLen);
}
/************************************************************************/
#ifdef DEBUG
_X_HIDDEN void
__glXDumpDrawBuffer(struct glx_context * ctx)
{
GLubyte *p = ctx->buf;
GLubyte *end = ctx->pc;
GLushort opcode, length;
while (p < end) {
/* Fetch opcode */
opcode = *((GLushort *) p);
length = *((GLushort *) (p + 2));
printf("%2x: %5d: ", opcode, length);
length -= 4;
p += 4;
while (length > 0) {
printf("%08x ", *((unsigned *) p));
p += 4;
length -= 4;
}
printf("\n");
}
}
#endif