summaryrefslogtreecommitdiff
path: root/src/glx/glxext.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/glx/glxext.c')
-rw-r--r--src/glx/glxext.c1060
1 files changed, 1060 insertions, 0 deletions
diff --git a/src/glx/glxext.c b/src/glx/glxext.c
new file mode 100644
index 0000000000..c2de1a3fff
--- /dev/null
+++ b/src/glx/glxext.c
@@ -0,0 +1,1060 @@
+/*
+ * 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>
+#include <X11/extensions/dri2proto.h>
+#include "glxextensions.h"
+#include "glcontextmodes.h"
+
+#ifdef USE_XCB
+#include <X11/Xlib-xcb.h>
+#include <xcb/xcb.h>
+#include <xcb/glx.h>
+#endif
+
+
+#ifdef DEBUG
+void __glXDumpDrawBuffer(__GLXcontext * 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 char *__glXExtensionName = GLX_EXTENSION_NAME;
+XExtensionInfo *__glXExtensionInfo = NULL;
+
+static /* const */ char *error_list[] = {
+ "GLXBadContext",
+ "GLXBadContextState",
+ "GLXBadDrawable",
+ "GLXBadPixmap",
+ "GLXBadContextTag",
+ "GLXBadCurrentWindow",
+ "GLXBadRenderRequest",
+ "GLXBadLargeRequest",
+ "GLXUnsupportedPrivateRequest",
+ "GLXBadFBConfig",
+ "GLXBadPbuffer",
+ "GLXBadCurrentDrawable",
+ "GLXBadWindow",
+};
+
+static int
+__glXCloseDisplay(Display * dpy, XExtCodes * codes)
+{
+ GLXContext gc;
+
+ gc = __glXGetCurrentContext();
+ if (dpy == gc->currentDpy) {
+ __glXSetCurrentContextNull();
+ __glXFreeContext(gc);
+ }
+
+ return XextRemoveDisplay(__glXExtensionInfo, dpy);
+}
+
+
+static
+XEXT_GENERATE_ERROR_STRING(__glXErrorString, __glXExtensionName,
+ __GLX_NUMBER_ERRORS, error_list)
+static Bool
+__glXWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
+static Status
+__glXEventToWire(Display *dpy, XEvent *event, xEvent *wire);
+
+static /* const */ XExtensionHooks __glXExtensionHooks = {
+ NULL, /* create_gc */
+ NULL, /* copy_gc */
+ NULL, /* flush_gc */
+ NULL, /* free_gc */
+ NULL, /* create_font */
+ NULL, /* free_font */
+ __glXCloseDisplay, /* close_display */
+ __glXWireToEvent, /* wire_to_event */
+ __glXEventToWire, /* event_to_wire */
+ NULL, /* error */
+ __glXErrorString, /* error_string */
+};
+
+XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
+ __glXExtensionName, &__glXExtensionHooks,
+ __GLX_NUMBER_EVENTS, NULL)
+
+/*
+ * 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)
+{
+ XExtDisplayInfo *info = __glXFindDisplay(dpy);
+
+ XextCheckExtension(dpy, info, __glXExtensionName, False);
+
+ switch ((wire->u.u.type & 0x7f) - info->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;
+ }
+ /* No easy symbol to test for this, as GLX_BufferSwapComplete is
+ * defined in the local glx.h header, but the
+ * xGLXBufferSwapComplete typedef is only available in new versions
+ * of the external glxproto.h header, which doesn't have any
+ * testable versioning define.
+ *
+ * I'll use the related DRI2 define, in the hope that we won't
+ * receive these events unless we know how to ask for them:
+ */
+#ifdef X_DRI2SwapBuffers
+ case GLX_BufferSwapComplete:
+ {
+ GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
+ xGLXBufferSwapComplete *awire = (xGLXBufferSwapComplete *)wire;
+ 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;
+ aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
+ return True;
+ }
+#endif
+ 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)
+{
+ XExtDisplayInfo *info = __glXFindDisplay(dpy);
+
+ XextCheckExtension(dpy, info, __glXExtensionName, False);
+
+ switch (event->type) {
+ case GLX_DAMAGED:
+ break;
+ case GLX_SAVED:
+ break;
+ case GLX_EXCHANGE_COMPLETE_INTEL:
+ break;
+ case GLX_BLIT_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(__GLXdisplayPrivate * priv)
+{
+ __GLXscreenConfigs *psc;
+ GLint i, screens;
+
+ /* Free screen configuration information */
+ psc = priv->screenConfigs;
+ screens = ScreenCount(priv->dpy);
+ for (i = 0; i < screens; i++, psc++) {
+ if (psc->configs) {
+ _gl_context_modes_destroy(psc->configs);
+ if (psc->effectiveGLXexts)
+ Xfree(psc->effectiveGLXexts);
+ psc->configs = NULL; /* NOTE: just for paranoia */
+ }
+ if (psc->visuals) {
+ _gl_context_modes_destroy(psc->visuals);
+ psc->visuals = NULL; /* NOTE: just for paranoia */
+ }
+ Xfree((char *) psc->serverGLXexts);
+
+#ifdef GLX_DIRECT_RENDERING
+ if (psc->driver_configs) {
+ unsigned int j;
+ for (j = 0; psc->driver_configs[j]; j++)
+ free((__DRIconfig *) psc->driver_configs[j]);
+ free(psc->driver_configs);
+ psc->driver_configs = NULL;
+ }
+ if (psc->driScreen) {
+ psc->driScreen->destroyScreen(psc);
+ __glxHashDestroy(psc->drawHash);
+ XFree(psc->driScreen);
+ psc->driScreen = NULL;
+ }
+#endif
+ }
+ XFree((char *) priv->screenConfigs);
+ priv->screenConfigs = NULL;
+}
+
+/*
+** Release the private memory referred to in a display private
+** structure. The caller will free the extension structure.
+*/
+static int
+__glXFreeDisplayPrivate(XExtData * extension)
+{
+ __GLXdisplayPrivate *priv;
+
+ priv = (__GLXdisplayPrivate *) extension->private_data;
+ FreeScreenConfigs(priv);
+ if (priv->serverGLXvendor) {
+ Xfree((char *) priv->serverGLXvendor);
+ priv->serverGLXvendor = 0x0; /* to protect against double free's */
+ }
+ if (priv->serverGLXversion) {
+ Xfree((char *) priv->serverGLXversion);
+ priv->serverGLXversion = 0x0; /* to protect against double free's */
+ }
+
+#ifdef GLX_DIRECT_RENDERING
+ /* 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);
+ return 0;
+}
+
+/************************************************************************/
+
+/*
+** 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->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 */
+}
+
+
+_X_HIDDEN void
+__glXInitializeVisualConfigFromTags(__GLcontextModes * 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 = _gl_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++;
+
+ count -= __GLX_MIN_CONFIG_PROPS;
+ }
+
+ /*
+ ** 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) {
+ switch (*bp++) {
+ 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++;
+ 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;
+ 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;
+ case GLX_SAMPLE_BUFFERS_SGIS:
+ config->sampleBuffers = *bp++;
+ break;
+ case GLX_SAMPLES_SGIS:
+ config->samples = *bp++;
+ break;
+ 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;
+ case None:
+ i = count;
+ break;
+ default:
+ break;
+ }
+ }
+
+ config->renderType =
+ (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
+
+ config->haveAccumBuffer = ((config->accumRedBits +
+ config->accumGreenBits +
+ config->accumBlueBits +
+ config->accumAlphaBits) > 0);
+ config->haveDepthBuffer = (config->depthBits > 0);
+ config->haveStencilBuffer = (config->stencilBits > 0);
+}
+
+static __GLcontextModes *
+createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
+ int screen, GLboolean tagged_only)
+{
+ INT32 buf[__GLX_TOTAL_CONFIG], *props;
+ unsigned prop_size;
+ __GLcontextModes *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 = _gl_context_modes_create(nvisuals, sizeof(__GLcontextModes));
+ 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);
+ /* Older X servers don't send this so we default it here. */
+ m->drawableType = GLX_WINDOW_BIT;
+ __glXInitializeVisualConfigFromTags(m, nprops, props,
+ tagged_only, GL_TRUE);
+ m->screen = screen;
+ m = m->next;
+ }
+
+ if (props != buf)
+ Xfree(props);
+
+ return modes;
+}
+
+static GLboolean
+getVisualConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
+{
+ xGLXGetVisualConfigsReq *req;
+ __GLXscreenConfigs *psc;
+ xGLXGetVisualConfigsReply reply;
+
+ LockDisplay(dpy);
+
+ psc = priv->screenConfigs + screen;
+ 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(Display * dpy, __GLXdisplayPrivate * priv, int screen)
+{
+ xGLXGetFBConfigsReq *fb_req;
+ xGLXGetFBConfigsSGIXReq *sgi_req;
+ xGLXVendorPrivateWithReplyReq *vpreq;
+ xGLXGetFBConfigsReply reply;
+ __GLXscreenConfigs *psc;
+
+ psc = priv->screenConfigs + screen;
+ 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;
+}
+
+/*
+** 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, __GLXdisplayPrivate * priv)
+{
+ __GLXscreenConfigs *psc;
+ GLint i, screens;
+
+ /*
+ ** First allocate memory for the array of per screen configs.
+ */
+ screens = ScreenCount(dpy);
+ psc = (__GLXscreenConfigs *) Xmalloc(screens * sizeof(__GLXscreenConfigs));
+ if (!psc) {
+ return GL_FALSE;
+ }
+ memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
+ priv->screenConfigs = psc;
+
+ 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++) {
+ getVisualConfigs(dpy, priv, i);
+ getFBConfigs(dpy, priv, i);
+
+#ifdef GLX_DIRECT_RENDERING
+ psc->scr = i;
+ psc->dpy = dpy;
+ psc->drawHash = __glxHashCreate();
+ if (psc->drawHash == NULL)
+ continue;
+
+ if (priv->dri2Display)
+ psc->driScreen = (*priv->dri2Display->createScreen) (psc, i, priv);
+
+ if (psc->driScreen == NULL && priv->driDisplay)
+ psc->driScreen = (*priv->driDisplay->createScreen) (psc, i, priv);
+
+ if (psc->driScreen == NULL && priv->driswDisplay)
+ psc->driScreen = (*priv->driswDisplay->createScreen) (psc, i, priv);
+
+ if (psc->driScreen == NULL) {
+ __glxHashDestroy(psc->drawHash);
+ psc->drawHash = NULL;
+ }
+#endif
+ }
+ SyncHandle();
+ return GL_TRUE;
+}
+
+/*
+** Initialize the client side extension code.
+*/
+_X_HIDDEN __GLXdisplayPrivate *
+__glXInitialize(Display * dpy)
+{
+ XExtDisplayInfo *info = __glXFindDisplay(dpy);
+ XExtData **privList, *private, *found;
+ __GLXdisplayPrivate *dpyPriv;
+ XEDataObject dataObj;
+ int major, minor;
+#ifdef GLX_DIRECT_RENDERING
+ Bool glx_direct, glx_accel;
+#endif
+
+ /* The one and only long long lock */
+ __glXLock();
+
+ if (!XextHasExtension(info)) {
+ /* No GLX extension supported by this server. Oh well. */
+ __glXUnlock();
+ XMissingExtension(dpy, __glXExtensionName);
+ return 0;
+ }
+
+ /* See if a display private already exists. If so, return it */
+ dataObj.display = dpy;
+ privList = XEHeadOfExtensionList(dataObj);
+ found = XFindOnExtensionList(privList, info->codes->extension);
+ if (found) {
+ __glXUnlock();
+ return (__GLXdisplayPrivate *) found->private_data;
+ }
+
+ /* See if the versions are compatible */
+ if (!QueryVersion(dpy, info->codes->major_opcode, &major, &minor)) {
+ /* The client and server do not agree on versions. Punt. */
+ __glXUnlock();
+ return 0;
+ }
+
+ /*
+ ** Allocate memory for all the pieces needed for this buffer.
+ */
+ private = (XExtData *) Xmalloc(sizeof(XExtData));
+ if (!private) {
+ __glXUnlock();
+ return 0;
+ }
+ dpyPriv = (__GLXdisplayPrivate *) Xcalloc(1, sizeof(__GLXdisplayPrivate));
+ if (!dpyPriv) {
+ __glXUnlock();
+ Xfree((char *) private);
+ return 0;
+ }
+
+ /*
+ ** Init the display private and then read in the screen config
+ ** structures from the server.
+ */
+ dpyPriv->majorOpcode = info->codes->major_opcode;
+ dpyPriv->majorVersion = major;
+ dpyPriv->minorVersion = minor;
+ dpyPriv->dpy = dpy;
+
+ dpyPriv->serverGLXvendor = 0x0;
+ dpyPriv->serverGLXversion = 0x0;
+
+#ifdef GLX_DIRECT_RENDERING
+ glx_direct = (getenv("LIBGL_ALWAYS_INDIRECT") == NULL);
+ glx_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
+
+ /*
+ ** 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
+
+ if (!AllocAndFetchScreenConfigs(dpy, dpyPriv)) {
+ __glXUnlock();
+ Xfree((char *) dpyPriv);
+ Xfree((char *) private);
+ return 0;
+ }
+
+ /*
+ ** Fill in the private structure. This is the actual structure that
+ ** hangs off of the Display structure. Our private structure is
+ ** referred to by this structure. Got that?
+ */
+ private->number = info->codes->extension;
+ private->next = 0;
+ private->free_private = __glXFreeDisplayPrivate;
+ private->private_data = (char *) dpyPriv;
+ XAddToExtensionList(privList, private);
+
+ if (dpyPriv->majorVersion == 1 && dpyPriv->minorVersion >= 1) {
+ __glXClientInfo(dpy, dpyPriv->majorOpcode);
+ }
+ __glXUnlock();
+
+ 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)
+{
+ GLXContext gc;
+ __GLXdisplayPrivate *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(__GLXcontext * 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(__GLXcontext * 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(__GLXcontext * 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(__GLXcontext * 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