diff options
Diffstat (limited to 'src/glx/glxext.c')
| -rw-r--r-- | src/glx/glxext.c | 1060 |
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 |