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  1. /*
  2.  * Copyright © 2008 Red Hat, Inc.
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the "Soft-
  6.  * ware"), to deal in the Software without restriction, including without
  7.  * limitation the rights to use, copy, modify, merge, publish, distribute,
  8.  * and/or sell copies of the Software, and to permit persons to whom the
  9.  * Software is furnished to do so, provided that the above copyright
  10.  * notice(s) and this permission notice appear in all copies of the Soft-
  11.  * ware and that both the above copyright notice(s) and this permission
  12.  * notice appear in supporting documentation.
  13.  *
  14.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  16.  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  17.  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  18.  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  19.  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20.  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21.  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  22.  * MANCE OF THIS SOFTWARE.
  23.  *
  24.  * Except as contained in this notice, the name of a copyright holder shall
  25.  * not be used in advertising or otherwise to promote the sale, use or
  26.  * other dealings in this Software without prior written authorization of
  27.  * the copyright holder.
  28.  *
  29.  * Authors:
  30.  *   Kristian Høgsberg (krh@redhat.com)
  31.  */
  32.  
  33. #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  34.  
  35. #include <X11/Xlib.h>
  36. #include <X11/extensions/Xfixes.h>
  37. #include <X11/Xlib-xcb.h>
  38. #include <xcb/xcb.h>
  39. #include <xcb/dri2.h>
  40. #include "glxclient.h"
  41. #include <X11/extensions/dri2proto.h>
  42. #include <dlfcn.h>
  43. #include <fcntl.h>
  44. #include <unistd.h>
  45. #include <sys/types.h>
  46. #include <sys/mman.h>
  47. #include <sys/time.h>
  48. #include "dri2.h"
  49. #include "dri_common.h"
  50. #include "dri2_priv.h"
  51. #include "loader.h"
  52.  
  53. /* From xmlpool/options.h, user exposed so should be stable */
  54. #define DRI_CONF_VBLANK_NEVER 0
  55. #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  56. #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  57. #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  58.  
  59. #undef DRI2_MINOR
  60. #define DRI2_MINOR 1
  61.  
  62. struct dri2_display
  63. {
  64.    __GLXDRIdisplay base;
  65.  
  66.    /*
  67.     ** XFree86-DRI version information
  68.     */
  69.    int driMajor;
  70.    int driMinor;
  71.    int driPatch;
  72.    int swapAvailable;
  73.    int invalidateAvailable;
  74.  
  75.    __glxHashTable *dri2Hash;
  76.  
  77.    const __DRIextension *loader_extensions[4];
  78. };
  79.  
  80. struct dri2_context
  81. {
  82.    struct glx_context base;
  83.    __DRIcontext *driContext;
  84. };
  85.  
  86. struct dri2_drawable
  87. {
  88.    __GLXDRIdrawable base;
  89.    __DRIdrawable *driDrawable;
  90.    __DRIbuffer buffers[5];
  91.    int bufferCount;
  92.    int width, height;
  93.    int have_back;
  94.    int have_fake_front;
  95.    int swap_interval;
  96.  
  97.    uint64_t previous_time;
  98.    unsigned frames;
  99. };
  100.  
  101. static const struct glx_context_vtable dri2_context_vtable;
  102.  
  103. /* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
  104.  * low halves separately.  This helps you split them.
  105.  */
  106. static void
  107. split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
  108. {
  109.    *hi = (counter >> 32);
  110.    *lo = counter & 0xffffffff;
  111. }
  112.  
  113. static uint64_t
  114. merge_counter(uint32_t hi, uint32_t lo)
  115. {
  116.    return ((uint64_t)hi << 32) | lo;
  117. }
  118.  
  119. static void
  120. dri2_destroy_context(struct glx_context *context)
  121. {
  122.    struct dri2_context *pcp = (struct dri2_context *) context;
  123.    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
  124.  
  125.    driReleaseDrawables(&pcp->base);
  126.  
  127.    free((char *) context->extensions);
  128.  
  129.    (*psc->core->destroyContext) (pcp->driContext);
  130.  
  131.    free(pcp);
  132. }
  133.  
  134. static Bool
  135. dri2_bind_context(struct glx_context *context, struct glx_context *old,
  136.                   GLXDrawable draw, GLXDrawable read)
  137. {
  138.    struct dri2_context *pcp = (struct dri2_context *) context;
  139.    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
  140.    struct dri2_drawable *pdraw, *pread;
  141.    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
  142.    struct glx_display *dpyPriv = psc->base.display;
  143.    struct dri2_display *pdp;
  144.  
  145.    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
  146.    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
  147.  
  148.    driReleaseDrawables(&pcp->base);
  149.  
  150.    if (pdraw)
  151.       dri_draw = pdraw->driDrawable;
  152.    else if (draw != None)
  153.       return GLXBadDrawable;
  154.  
  155.    if (pread)
  156.       dri_read = pread->driDrawable;
  157.    else if (read != None)
  158.       return GLXBadDrawable;
  159.  
  160.    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
  161.       return GLXBadContext;
  162.  
  163.    /* If the server doesn't send invalidate events, we may miss a
  164.     * resize before the rendering starts.  Invalidate the buffers now
  165.     * so the driver will recheck before rendering starts. */
  166.    pdp = (struct dri2_display *) dpyPriv->dri2Display;
  167.    if (!pdp->invalidateAvailable && pdraw) {
  168.       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
  169.       if (pread != pdraw && pread)
  170.          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
  171.    }
  172.  
  173.    return Success;
  174. }
  175.  
  176. static void
  177. dri2_unbind_context(struct glx_context *context, struct glx_context *new)
  178. {
  179.    struct dri2_context *pcp = (struct dri2_context *) context;
  180.    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
  181.  
  182.    (*psc->core->unbindContext) (pcp->driContext);
  183. }
  184.  
  185. static struct glx_context *
  186. dri2_create_context(struct glx_screen *base,
  187.                     struct glx_config *config_base,
  188.                     struct glx_context *shareList, int renderType)
  189. {
  190.    struct dri2_context *pcp, *pcp_shared;
  191.    struct dri2_screen *psc = (struct dri2_screen *) base;
  192.    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
  193.    __DRIcontext *shared = NULL;
  194.  
  195.    /* Check the renderType value */
  196.    if (!validate_renderType_against_config(config_base, renderType))
  197.        return NULL;
  198.  
  199.    if (shareList) {
  200.       /* If the shareList context is not a DRI2 context, we cannot possibly
  201.        * create a DRI2 context that shares it.
  202.        */
  203.       if (shareList->vtable->destroy != dri2_destroy_context) {
  204.          return NULL;
  205.       }
  206.  
  207.       pcp_shared = (struct dri2_context *) shareList;
  208.       shared = pcp_shared->driContext;
  209.    }
  210.  
  211.    pcp = calloc(1, sizeof *pcp);
  212.    if (pcp == NULL)
  213.       return NULL;
  214.  
  215.    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
  216.       free(pcp);
  217.       return NULL;
  218.    }
  219.  
  220.    pcp->base.renderType = renderType;
  221.  
  222.    pcp->driContext =
  223.       (*psc->dri2->createNewContext) (psc->driScreen,
  224.                                       config->driConfig, shared, pcp);
  225.  
  226.    if (pcp->driContext == NULL) {
  227.       free(pcp);
  228.       return NULL;
  229.    }
  230.  
  231.    pcp->base.vtable = &dri2_context_vtable;
  232.  
  233.    return &pcp->base;
  234. }
  235.  
  236. static struct glx_context *
  237. dri2_create_context_attribs(struct glx_screen *base,
  238.                             struct glx_config *config_base,
  239.                             struct glx_context *shareList,
  240.                             unsigned num_attribs,
  241.                             const uint32_t *attribs,
  242.                             unsigned *error)
  243. {
  244.    struct dri2_context *pcp = NULL;
  245.    struct dri2_context *pcp_shared = NULL;
  246.    struct dri2_screen *psc = (struct dri2_screen *) base;
  247.    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
  248.    __DRIcontext *shared = NULL;
  249.  
  250.    uint32_t minor_ver;
  251.    uint32_t major_ver;
  252.    uint32_t renderType;
  253.    uint32_t flags;
  254.    unsigned api;
  255.    int reset;
  256.    uint32_t ctx_attribs[2 * 5];
  257.    unsigned num_ctx_attribs = 0;
  258.  
  259.    if (psc->dri2->base.version < 3) {
  260.       *error = __DRI_CTX_ERROR_NO_MEMORY;
  261.       goto error_exit;
  262.    }
  263.  
  264.    /* Remap the GLX tokens to DRI2 tokens.
  265.     */
  266.    if (!dri2_convert_glx_attribs(num_attribs, attribs,
  267.                                  &major_ver, &minor_ver, &renderType, &flags,
  268.                                  &api, &reset, error))
  269.       goto error_exit;
  270.  
  271.    /* Check the renderType value */
  272.    if (!validate_renderType_against_config(config_base, renderType))
  273.        goto error_exit;
  274.  
  275.    if (shareList) {
  276.       pcp_shared = (struct dri2_context *) shareList;
  277.       shared = pcp_shared->driContext;
  278.    }
  279.  
  280.    pcp = calloc(1, sizeof *pcp);
  281.    if (pcp == NULL) {
  282.       *error = __DRI_CTX_ERROR_NO_MEMORY;
  283.       goto error_exit;
  284.    }
  285.  
  286.    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
  287.       goto error_exit;
  288.  
  289.    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
  290.    ctx_attribs[num_ctx_attribs++] = major_ver;
  291.    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
  292.    ctx_attribs[num_ctx_attribs++] = minor_ver;
  293.  
  294.    /* Only send a value when the non-default value is requested.  By doing
  295.     * this we don't have to check the driver's DRI2 version before sending the
  296.     * default value.
  297.     */
  298.    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
  299.       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
  300.       ctx_attribs[num_ctx_attribs++] = reset;
  301.    }
  302.  
  303.    if (flags != 0) {
  304.       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
  305.  
  306.       /* The current __DRI_CTX_FLAG_* values are identical to the
  307.        * GLX_CONTEXT_*_BIT values.
  308.        */
  309.       ctx_attribs[num_ctx_attribs++] = flags;
  310.    }
  311.  
  312.    /* The renderType is retrieved from attribs, or set to default
  313.     *  of GLX_RGBA_TYPE.
  314.     */
  315.    pcp->base.renderType = renderType;
  316.  
  317.    pcp->driContext =
  318.       (*psc->dri2->createContextAttribs) (psc->driScreen,
  319.                                           api,
  320.                                           config->driConfig,
  321.                                           shared,
  322.                                           num_ctx_attribs / 2,
  323.                                           ctx_attribs,
  324.                                           error,
  325.                                           pcp);
  326.  
  327.    if (pcp->driContext == NULL)
  328.       goto error_exit;
  329.  
  330.    pcp->base.vtable = &dri2_context_vtable;
  331.  
  332.    return &pcp->base;
  333.  
  334. error_exit:
  335.    free(pcp);
  336.  
  337.    return NULL;
  338. }
  339.  
  340. static void
  341. dri2DestroyDrawable(__GLXDRIdrawable *base)
  342. {
  343.    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
  344.    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
  345.    struct glx_display *dpyPriv = psc->base.display;
  346.    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
  347.  
  348.    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
  349.    (*psc->core->destroyDrawable) (pdraw->driDrawable);
  350.  
  351.    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
  352.     * now, as the application explicitly asked to destroy the GLX
  353.     * drawable.  Otherwise, for legacy drawables, we let the DRI2
  354.     * drawable linger on the server, since there's no good way of
  355.     * knowing when the application is done with it.  The server will
  356.     * destroy the DRI2 drawable when it destroys the X drawable or the
  357.     * client exits anyway. */
  358.    if (pdraw->base.xDrawable != pdraw->base.drawable)
  359.       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
  360.  
  361.    free(pdraw);
  362. }
  363.  
  364. static __GLXDRIdrawable *
  365. dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
  366.                    GLXDrawable drawable, struct glx_config *config_base)
  367. {
  368.    struct dri2_drawable *pdraw;
  369.    struct dri2_screen *psc = (struct dri2_screen *) base;
  370.    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
  371.    struct glx_display *dpyPriv;
  372.    struct dri2_display *pdp;
  373.    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
  374.  
  375.    dpyPriv = __glXInitialize(psc->base.dpy);
  376.    if (dpyPriv == NULL)
  377.       return NULL;
  378.  
  379.    pdraw = calloc(1, sizeof(*pdraw));
  380.    if (!pdraw)
  381.       return NULL;
  382.  
  383.    pdraw->base.destroyDrawable = dri2DestroyDrawable;
  384.    pdraw->base.xDrawable = xDrawable;
  385.    pdraw->base.drawable = drawable;
  386.    pdraw->base.psc = &psc->base;
  387.    pdraw->bufferCount = 0;
  388.    pdraw->swap_interval = 1; /* default may be overridden below */
  389.    pdraw->have_back = 0;
  390.  
  391.    if (psc->config)
  392.       psc->config->configQueryi(psc->driScreen,
  393.                                 "vblank_mode", &vblank_mode);
  394.  
  395.    switch (vblank_mode) {
  396.    case DRI_CONF_VBLANK_NEVER:
  397.    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
  398.       pdraw->swap_interval = 0;
  399.       break;
  400.    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
  401.    case DRI_CONF_VBLANK_ALWAYS_SYNC:
  402.    default:
  403.       pdraw->swap_interval = 1;
  404.       break;
  405.    }
  406.  
  407.    DRI2CreateDrawable(psc->base.dpy, xDrawable);
  408.    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
  409.    /* Create a new drawable */
  410.    pdraw->driDrawable =
  411.       (*psc->dri2->createNewDrawable) (psc->driScreen,
  412.                                        config->driConfig, pdraw);
  413.  
  414.    if (!pdraw->driDrawable) {
  415.       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
  416.       free(pdraw);
  417.       return NULL;
  418.    }
  419.  
  420.    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
  421.       (*psc->core->destroyDrawable) (pdraw->driDrawable);
  422.       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
  423.       free(pdraw);
  424.       return None;
  425.    }
  426.  
  427.    /*
  428.     * Make sure server has the same swap interval we do for the new
  429.     * drawable.
  430.     */
  431.    if (psc->vtable.setSwapInterval)
  432.       psc->vtable.setSwapInterval(&pdraw->base, pdraw->swap_interval);
  433.  
  434.    return &pdraw->base;
  435. }
  436.  
  437. static int
  438. dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
  439.                    int64_t *ust, int64_t *msc, int64_t *sbc)
  440. {
  441.    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
  442.    xcb_dri2_get_msc_cookie_t get_msc_cookie;
  443.    xcb_dri2_get_msc_reply_t *get_msc_reply;
  444.  
  445.    get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
  446.    get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
  447.  
  448.    if (!get_msc_reply)
  449.       return 0;
  450.  
  451.    *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
  452.    *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
  453.    *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
  454.    free(get_msc_reply);
  455.  
  456.    return 1;
  457. }
  458.  
  459. static int
  460. dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
  461.                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
  462. {
  463.    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
  464.    xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
  465.    xcb_dri2_wait_msc_reply_t *wait_msc_reply;
  466.    uint32_t target_msc_hi, target_msc_lo;
  467.    uint32_t divisor_hi, divisor_lo;
  468.    uint32_t remainder_hi, remainder_lo;
  469.  
  470.    split_counter(target_msc, &target_msc_hi, &target_msc_lo);
  471.    split_counter(divisor, &divisor_hi, &divisor_lo);
  472.    split_counter(remainder, &remainder_hi, &remainder_lo);
  473.  
  474.    wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
  475.                                                  target_msc_hi, target_msc_lo,
  476.                                                  divisor_hi, divisor_lo,
  477.                                                  remainder_hi, remainder_lo);
  478.    wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
  479.  
  480.    if (!wait_msc_reply)
  481.       return 0;
  482.  
  483.    *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
  484.    *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
  485.    *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
  486.    free(wait_msc_reply);
  487.  
  488.    return 1;
  489. }
  490.  
  491. static int
  492. dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
  493.                int64_t *msc, int64_t *sbc)
  494. {
  495.    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
  496.    xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
  497.    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
  498.    uint32_t target_sbc_hi, target_sbc_lo;
  499.  
  500.    split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
  501.  
  502.    wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
  503.                                                  target_sbc_hi, target_sbc_lo);
  504.    wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
  505.  
  506.    if (!wait_sbc_reply)
  507.       return 0;
  508.  
  509.    *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
  510.    *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
  511.    *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
  512.    free(wait_sbc_reply);
  513.  
  514.    return 1;
  515. }
  516.  
  517. static __DRIcontext *
  518. dri2GetCurrentContext()
  519. {
  520.    struct glx_context *gc = __glXGetCurrentContext();
  521.    struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
  522.  
  523.    return dri2Ctx ? dri2Ctx->driContext : NULL;
  524. }
  525.  
  526. /**
  527.  * dri2Throttle - Request driver throttling
  528.  *
  529.  * This function uses the DRI2 throttle extension to give the
  530.  * driver the opportunity to throttle on flush front, copysubbuffer
  531.  * and swapbuffers.
  532.  */
  533. static void
  534. dri2Throttle(struct dri2_screen *psc,
  535.              struct dri2_drawable *draw,
  536.              enum __DRI2throttleReason reason)
  537. {
  538.    if (psc->throttle) {
  539.       __DRIcontext *ctx = dri2GetCurrentContext();
  540.  
  541.       psc->throttle->throttle(ctx, draw->driDrawable, reason);
  542.    }
  543. }
  544.  
  545. /**
  546.  * Asks the driver to flush any queued work necessary for serializing with the
  547.  * X command stream, and optionally the slightly more strict requirement of
  548.  * glFlush() equivalence (which would require flushing even if nothing had
  549.  * been drawn to a window system framebuffer, for example).
  550.  */
  551. static void
  552. dri2Flush(struct dri2_screen *psc,
  553.           __DRIcontext *ctx,
  554.           struct dri2_drawable *draw,
  555.           unsigned flags,
  556.           enum __DRI2throttleReason throttle_reason)
  557. {
  558.    if (ctx && psc->f && psc->f->base.version >= 4) {
  559.       psc->f->flush_with_flags(ctx, draw->driDrawable, flags, throttle_reason);
  560.    } else {
  561.       if (flags & __DRI2_FLUSH_CONTEXT)
  562.          glFlush();
  563.  
  564.       if (psc->f)
  565.          psc->f->flush(draw->driDrawable);
  566.  
  567.       dri2Throttle(psc, draw, throttle_reason);
  568.    }
  569. }
  570.  
  571. static void
  572. __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
  573.                     int width, int height,
  574.                     enum __DRI2throttleReason reason, Bool flush)
  575. {
  576.    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
  577.    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
  578.    XRectangle xrect;
  579.    XserverRegion region;
  580.    __DRIcontext *ctx = dri2GetCurrentContext();
  581.    unsigned flags;
  582.  
  583.    /* Check we have the right attachments */
  584.    if (!priv->have_back)
  585.       return;
  586.  
  587.    xrect.x = x;
  588.    xrect.y = priv->height - y - height;
  589.    xrect.width = width;
  590.    xrect.height = height;
  591.  
  592.    flags = __DRI2_FLUSH_DRAWABLE;
  593.    if (flush)
  594.       flags |= __DRI2_FLUSH_CONTEXT;
  595.    dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
  596.  
  597.    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
  598.    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
  599.                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
  600.  
  601.    /* Refresh the fake front (if present) after we just damaged the real
  602.     * front.
  603.     */
  604.    if (priv->have_fake_front)
  605.       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
  606.                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
  607.  
  608.    XFixesDestroyRegion(psc->base.dpy, region);
  609. }
  610.  
  611. static void
  612. dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
  613.                   int width, int height, Bool flush)
  614. {
  615.    __dri2CopySubBuffer(pdraw, x, y, width, height,
  616.                        __DRI2_THROTTLE_COPYSUBBUFFER, flush);
  617. }
  618.  
  619.  
  620. static void
  621. dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
  622. {
  623.    XRectangle xrect;
  624.    XserverRegion region;
  625.    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
  626.  
  627.    xrect.x = 0;
  628.    xrect.y = 0;
  629.    xrect.width = priv->width;
  630.    xrect.height = priv->height;
  631.  
  632.    if (psc->f)
  633.       (*psc->f->flush) (priv->driDrawable);
  634.  
  635.    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
  636.    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
  637.    XFixesDestroyRegion(psc->base.dpy, region);
  638.  
  639. }
  640.  
  641. static void
  642. dri2_wait_x(struct glx_context *gc)
  643. {
  644.    struct dri2_drawable *priv = (struct dri2_drawable *)
  645.       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
  646.  
  647.    if (priv == NULL || !priv->have_fake_front)
  648.       return;
  649.  
  650.    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
  651. }
  652.  
  653. static void
  654. dri2_wait_gl(struct glx_context *gc)
  655. {
  656.    struct dri2_drawable *priv = (struct dri2_drawable *)
  657.       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
  658.  
  659.    if (priv == NULL || !priv->have_fake_front)
  660.       return;
  661.  
  662.    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
  663. }
  664.  
  665. /**
  666.  * Called by the driver when it needs to update the real front buffer with the
  667.  * contents of its fake front buffer.
  668.  */
  669. static void
  670. dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
  671. {
  672.    struct glx_display *priv;
  673.    struct dri2_display *pdp;
  674.    struct glx_context *gc;
  675.    struct dri2_drawable *pdraw = loaderPrivate;
  676.    struct dri2_screen *psc;
  677.  
  678.    if (!pdraw)
  679.       return;
  680.  
  681.    if (!pdraw->base.psc)
  682.       return;
  683.  
  684.    psc = (struct dri2_screen *) pdraw->base.psc;
  685.  
  686.    priv = __glXInitialize(psc->base.dpy);
  687.  
  688.    if (priv == NULL)
  689.        return;
  690.  
  691.    pdp = (struct dri2_display *) priv->dri2Display;
  692.    gc = __glXGetCurrentContext();
  693.  
  694.    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
  695.  
  696.    /* Old servers don't send invalidate events */
  697.    if (!pdp->invalidateAvailable)
  698.        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
  699.  
  700.    dri2_wait_gl(gc);
  701. }
  702.  
  703.  
  704. static void
  705. dri2DestroyScreen(struct glx_screen *base)
  706. {
  707.    struct dri2_screen *psc = (struct dri2_screen *) base;
  708.  
  709.    /* Free the direct rendering per screen data */
  710.    (*psc->core->destroyScreen) (psc->driScreen);
  711.    driDestroyConfigs(psc->driver_configs);
  712.    close(psc->fd);
  713.    free(psc);
  714. }
  715.  
  716. /**
  717.  * Process list of buffer received from the server
  718.  *
  719.  * Processes the list of buffers received in a reply from the server to either
  720.  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
  721.  */
  722. static void
  723. process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
  724.                 unsigned count)
  725. {
  726.    int i;
  727.  
  728.    pdraw->bufferCount = count;
  729.    pdraw->have_fake_front = 0;
  730.    pdraw->have_back = 0;
  731.  
  732.    /* This assumes the DRI2 buffer attachment tokens matches the
  733.     * __DRIbuffer tokens. */
  734.    for (i = 0; i < count; i++) {
  735.       pdraw->buffers[i].attachment = buffers[i].attachment;
  736.       pdraw->buffers[i].name = buffers[i].name;
  737.       pdraw->buffers[i].pitch = buffers[i].pitch;
  738.       pdraw->buffers[i].cpp = buffers[i].cpp;
  739.       pdraw->buffers[i].flags = buffers[i].flags;
  740.       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
  741.          pdraw->have_fake_front = 1;
  742.       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
  743.          pdraw->have_back = 1;
  744.    }
  745.  
  746. }
  747.  
  748. unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
  749. {
  750.       struct glx_display *glx_dpy = __glXInitialize(dpy);
  751.       __GLXDRIdrawable *pdraw;
  752.       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
  753.       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
  754.          return 0;
  755.       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
  756. }
  757.  
  758. static void show_fps(struct dri2_drawable *draw)
  759. {
  760.    const int interval =
  761.       ((struct dri2_screen *) draw->base.psc)->show_fps_interval;
  762.    struct timeval tv;
  763.    uint64_t current_time;
  764.  
  765.    gettimeofday(&tv, 0);
  766.    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
  767.  
  768.    draw->frames++;
  769.  
  770.    if (draw->previous_time + interval * 1000000 <= current_time) {
  771.       if (draw->previous_time) {
  772.          fprintf(stderr, "libGL: FPS = %.1f\n",
  773.                  ((uint64_t)draw->frames * 1000000) /
  774.                  (double)(current_time - draw->previous_time));
  775.       }
  776.       draw->frames = 0;
  777.       draw->previous_time = current_time;
  778.    }
  779. }
  780.  
  781. static int64_t
  782. dri2XcbSwapBuffers(Display *dpy,
  783.                   __GLXDRIdrawable *pdraw,
  784.                   int64_t target_msc,
  785.                   int64_t divisor,
  786.                   int64_t remainder)
  787. {
  788.    xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
  789.    xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
  790.    uint32_t target_msc_hi, target_msc_lo;
  791.    uint32_t divisor_hi, divisor_lo;
  792.    uint32_t remainder_hi, remainder_lo;
  793.    int64_t ret = 0;
  794.    xcb_connection_t *c = XGetXCBConnection(dpy);
  795.  
  796.    split_counter(target_msc, &target_msc_hi, &target_msc_lo);
  797.    split_counter(divisor, &divisor_hi, &divisor_lo);
  798.    split_counter(remainder, &remainder_hi, &remainder_lo);
  799.  
  800.    swap_buffers_cookie =
  801.       xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
  802.                                       target_msc_hi, target_msc_lo,
  803.                                       divisor_hi, divisor_lo,
  804.                                       remainder_hi, remainder_lo);
  805.  
  806.    /* Immediately wait on the swapbuffers reply.  If we didn't, we'd have
  807.     * to do so some time before reusing a (non-pageflipped) backbuffer.
  808.     * Otherwise, the new rendering could get ahead of the X Server's
  809.     * dispatch of the swapbuffer and you'd display garbage.
  810.     *
  811.     * We use XSync() first to reap the invalidate events through the event
  812.     * filter, to ensure that the next drawing doesn't use an invalidated
  813.     * buffer.
  814.     */
  815.    XSync(dpy, False);
  816.  
  817.    swap_buffers_reply =
  818.       xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
  819.    if (swap_buffers_reply) {
  820.       ret = merge_counter(swap_buffers_reply->swap_hi,
  821.                           swap_buffers_reply->swap_lo);
  822.       free(swap_buffers_reply);
  823.    }
  824.    return ret;
  825. }
  826.  
  827. static int64_t
  828. dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
  829.                 int64_t remainder, Bool flush)
  830. {
  831.     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
  832.     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
  833.     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
  834.     struct dri2_display *pdp =
  835.         (struct dri2_display *)dpyPriv->dri2Display;
  836.     int64_t ret = 0;
  837.  
  838.     /* Check we have the right attachments */
  839.     if (!priv->have_back)
  840.         return ret;
  841.  
  842.     /* Old servers can't handle swapbuffers */
  843.     if (!pdp->swapAvailable) {
  844.        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
  845.                            __DRI2_THROTTLE_SWAPBUFFER, flush);
  846.     } else {
  847.        __DRIcontext *ctx = dri2GetCurrentContext();
  848.        unsigned flags = __DRI2_FLUSH_DRAWABLE;
  849.        if (flush)
  850.           flags |= __DRI2_FLUSH_CONTEXT;
  851.        dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
  852.  
  853.        ret = dri2XcbSwapBuffers(pdraw->psc->dpy, pdraw,
  854.                                 target_msc, divisor, remainder);
  855.     }
  856.  
  857.     if (psc->show_fps_interval) {
  858.        show_fps(priv);
  859.     }
  860.  
  861.     /* Old servers don't send invalidate events */
  862.     if (!pdp->invalidateAvailable)
  863.        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
  864.  
  865.     return ret;
  866. }
  867.  
  868. static __DRIbuffer *
  869. dri2GetBuffers(__DRIdrawable * driDrawable,
  870.                int *width, int *height,
  871.                unsigned int *attachments, int count,
  872.                int *out_count, void *loaderPrivate)
  873. {
  874.    struct dri2_drawable *pdraw = loaderPrivate;
  875.    DRI2Buffer *buffers;
  876.  
  877.    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
  878.                             width, height, attachments, count, out_count);
  879.    if (buffers == NULL)
  880.       return NULL;
  881.  
  882.    pdraw->width = *width;
  883.    pdraw->height = *height;
  884.    process_buffers(pdraw, buffers, *out_count);
  885.  
  886.    free(buffers);
  887.  
  888.    return pdraw->buffers;
  889. }
  890.  
  891. static __DRIbuffer *
  892. dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
  893.                          int *width, int *height,
  894.                          unsigned int *attachments, int count,
  895.                          int *out_count, void *loaderPrivate)
  896. {
  897.    struct dri2_drawable *pdraw = loaderPrivate;
  898.    DRI2Buffer *buffers;
  899.  
  900.    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
  901.                                       pdraw->base.xDrawable,
  902.                                       width, height, attachments,
  903.                                       count, out_count);
  904.    if (buffers == NULL)
  905.       return NULL;
  906.  
  907.    pdraw->width = *width;
  908.    pdraw->height = *height;
  909.    process_buffers(pdraw, buffers, *out_count);
  910.  
  911.    free(buffers);
  912.  
  913.    return pdraw->buffers;
  914. }
  915.  
  916. static int
  917. dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
  918. {
  919.    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
  920.    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
  921.    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
  922.    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
  923.  
  924.    if (psc->config)
  925.       psc->config->configQueryi(psc->driScreen,
  926.                                 "vblank_mode", &vblank_mode);
  927.  
  928.    switch (vblank_mode) {
  929.    case DRI_CONF_VBLANK_NEVER:
  930.       if (interval != 0)
  931.          return GLX_BAD_VALUE;
  932.       break;
  933.    case DRI_CONF_VBLANK_ALWAYS_SYNC:
  934.       if (interval <= 0)
  935.          return GLX_BAD_VALUE;
  936.       break;
  937.    default:
  938.       break;
  939.    }
  940.  
  941.    xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
  942.    priv->swap_interval = interval;
  943.  
  944.    return 0;
  945. }
  946.  
  947. static int
  948. dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
  949. {
  950.    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
  951.  
  952.   return priv->swap_interval;
  953. }
  954.  
  955. static const __DRIdri2LoaderExtension dri2LoaderExtension = {
  956.    .base = { __DRI_DRI2_LOADER, 3 },
  957.  
  958.    .getBuffers              = dri2GetBuffers,
  959.    .flushFrontBuffer        = dri2FlushFrontBuffer,
  960.    .getBuffersWithFormat    = dri2GetBuffersWithFormat,
  961. };
  962.  
  963. static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
  964.    .base = { __DRI_DRI2_LOADER, 3 },
  965.  
  966.    .getBuffers              = dri2GetBuffers,
  967.    .flushFrontBuffer        = dri2FlushFrontBuffer,
  968.    .getBuffersWithFormat    = NULL,
  969. };
  970.  
  971. static const __DRIuseInvalidateExtension dri2UseInvalidate = {
  972.    .base = { __DRI_USE_INVALIDATE, 1 }
  973. };
  974.  
  975. _X_HIDDEN void
  976. dri2InvalidateBuffers(Display *dpy, XID drawable)
  977. {
  978.    __GLXDRIdrawable *pdraw =
  979.       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
  980.    struct dri2_screen *psc;
  981.    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
  982.  
  983.    if (!pdraw)
  984.       return;
  985.  
  986.    psc = (struct dri2_screen *) pdraw->psc;
  987.  
  988.    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
  989.        psc->f->invalidate(pdp->driDrawable);
  990. }
  991.  
  992. static void
  993. dri2_bind_tex_image(Display * dpy,
  994.                     GLXDrawable drawable,
  995.                     int buffer, const int *attrib_list)
  996. {
  997.    struct glx_context *gc = __glXGetCurrentContext();
  998.    struct dri2_context *pcp = (struct dri2_context *) gc;
  999.    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
  1000.    struct glx_display *dpyPriv = __glXInitialize(dpy);
  1001.    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
  1002.    struct dri2_display *pdp;
  1003.    struct dri2_screen *psc;
  1004.  
  1005.    if (dpyPriv == NULL)
  1006.        return;
  1007.  
  1008.    pdp = (struct dri2_display *) dpyPriv->dri2Display;
  1009.  
  1010.    if (pdraw != NULL) {
  1011.       psc = (struct dri2_screen *) base->psc;
  1012.  
  1013.       if (!pdp->invalidateAvailable && psc->f &&
  1014.            psc->f->base.version >= 3 && psc->f->invalidate)
  1015.          psc->f->invalidate(pdraw->driDrawable);
  1016.  
  1017.       if (psc->texBuffer->base.version >= 2 &&
  1018.           psc->texBuffer->setTexBuffer2 != NULL) {
  1019.          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
  1020.                                            pdraw->base.textureTarget,
  1021.                                            pdraw->base.textureFormat,
  1022.                                            pdraw->driDrawable);
  1023.       }
  1024.       else {
  1025.          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
  1026.                                           pdraw->base.textureTarget,
  1027.                                           pdraw->driDrawable);
  1028.       }
  1029.    }
  1030. }
  1031.  
  1032. static void
  1033. dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
  1034. {
  1035.    struct glx_context *gc = __glXGetCurrentContext();
  1036.    struct dri2_context *pcp = (struct dri2_context *) gc;
  1037.    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
  1038.    struct glx_display *dpyPriv = __glXInitialize(dpy);
  1039.    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
  1040.    struct dri2_screen *psc;
  1041.  
  1042.    if (dpyPriv != NULL && pdraw != NULL) {
  1043.       psc = (struct dri2_screen *) base->psc;
  1044.  
  1045.       if (psc->texBuffer->base.version >= 3 &&
  1046.           psc->texBuffer->releaseTexBuffer != NULL) {
  1047.          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
  1048.                                            pdraw->base.textureTarget,
  1049.                                            pdraw->driDrawable);
  1050.       }
  1051.    }
  1052. }
  1053.  
  1054. static const struct glx_context_vtable dri2_context_vtable = {
  1055.    .destroy             = dri2_destroy_context,
  1056.    .bind                = dri2_bind_context,
  1057.    .unbind              = dri2_unbind_context,
  1058.    .wait_gl             = dri2_wait_gl,
  1059.    .wait_x              = dri2_wait_x,
  1060.    .use_x_font          = DRI_glXUseXFont,
  1061.    .bind_tex_image      = dri2_bind_tex_image,
  1062.    .release_tex_image   = dri2_release_tex_image,
  1063.    .get_proc_address    = NULL,
  1064. };
  1065.  
  1066. static void
  1067. dri2BindExtensions(struct dri2_screen *psc, struct glx_display * priv,
  1068.                    const char *driverName)
  1069. {
  1070.    const struct dri2_display *const pdp = (struct dri2_display *)
  1071.       priv->dri2Display;
  1072.    const __DRIextension **extensions;
  1073.    int i;
  1074.  
  1075.    extensions = psc->core->getExtensions(psc->driScreen);
  1076.  
  1077.    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
  1078.    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
  1079.    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
  1080.    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
  1081.  
  1082.    /*
  1083.     * GLX_INTEL_swap_event is broken on the server side, where it's
  1084.     * currently unconditionally enabled. This completely breaks
  1085.     * systems running on drivers which don't support that extension.
  1086.     * There's no way to test for its presence on this side, so instead
  1087.     * of disabling it unconditionally, just disable it for drivers
  1088.     * which are known to not support it, or for DDX drivers supporting
  1089.     * only an older (pre-ScheduleSwap) version of DRI2.
  1090.     *
  1091.     * This is a hack which is required until:
  1092.     * http://lists.x.org/archives/xorg-devel/2013-February/035449.html
  1093.     * is merged and updated xserver makes it's way into distros:
  1094.     */
  1095.    if (pdp->swapAvailable && strcmp(driverName, "vmwgfx") != 0) {
  1096.       __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
  1097.    }
  1098.  
  1099.    if (psc->dri2->base.version >= 3) {
  1100.       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
  1101.  
  1102.       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
  1103.       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
  1104.  
  1105.       if ((mask & (1 << __DRI_API_GLES2)) != 0)
  1106.          __glXEnableDirectExtension(&psc->base,
  1107.                                     "GLX_EXT_create_context_es2_profile");
  1108.    }
  1109.  
  1110.    for (i = 0; extensions[i]; i++) {
  1111.       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
  1112.          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
  1113.          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
  1114.       }
  1115.  
  1116.       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
  1117.          psc->f = (__DRI2flushExtension *) extensions[i];
  1118.          /* internal driver extension, no GL extension exposed */
  1119.       }
  1120.  
  1121.       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
  1122.          psc->config = (__DRI2configQueryExtension *) extensions[i];
  1123.  
  1124.       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
  1125.          psc->throttle = (__DRI2throttleExtension *) extensions[i];
  1126.  
  1127.       /* DRI2 version 3 is also required because
  1128.        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
  1129.        */
  1130.       if (psc->dri2->base.version >= 3
  1131.           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
  1132.          __glXEnableDirectExtension(&psc->base,
  1133.                                     "GLX_ARB_create_context_robustness");
  1134.  
  1135.       /* DRI2 version 3 is also required because GLX_MESA_query_renderer
  1136.        * requires GLX_ARB_create_context_profile.
  1137.        */
  1138.       if (psc->dri2->base.version >= 3
  1139.           && strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
  1140.          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
  1141.          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
  1142.       }
  1143.    }
  1144. }
  1145.  
  1146. static const struct glx_screen_vtable dri2_screen_vtable = {
  1147.    .create_context         = dri2_create_context,
  1148.    .create_context_attribs = dri2_create_context_attribs,
  1149.    .query_renderer_integer = dri2_query_renderer_integer,
  1150.    .query_renderer_string  = dri2_query_renderer_string,
  1151. };
  1152.  
  1153. static struct glx_screen *
  1154. dri2CreateScreen(int screen, struct glx_display * priv)
  1155. {
  1156.    const __DRIconfig **driver_configs;
  1157.    const __DRIextension **extensions;
  1158.    const struct dri2_display *const pdp = (struct dri2_display *)
  1159.       priv->dri2Display;
  1160.    struct dri2_screen *psc;
  1161.    __GLXDRIscreen *psp;
  1162.    struct glx_config *configs = NULL, *visuals = NULL;
  1163.    char *driverName = NULL, *loader_driverName, *deviceName, *tmp;
  1164.    drm_magic_t magic;
  1165.    int i;
  1166.  
  1167.    psc = calloc(1, sizeof *psc);
  1168.    if (psc == NULL)
  1169.       return NULL;
  1170.  
  1171.    psc->fd = -1;
  1172.  
  1173.    if (!glx_screen_init(&psc->base, screen, priv)) {
  1174.       free(psc);
  1175.       return NULL;
  1176.    }
  1177.  
  1178.    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
  1179.                     &driverName, &deviceName)) {
  1180.       glx_screen_cleanup(&psc->base);
  1181.       free(psc);
  1182.       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
  1183.       return NULL;
  1184.    }
  1185.  
  1186. #ifdef O_CLOEXEC
  1187.    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
  1188.    if (psc->fd == -1 && errno == EINVAL)
  1189. #endif
  1190.    {
  1191.       psc->fd = open(deviceName, O_RDWR);
  1192.       if (psc->fd != -1)
  1193.          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
  1194.    }
  1195.    if (psc->fd < 0) {
  1196.       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
  1197.       goto handle_error;
  1198.    }
  1199.  
  1200.    if (drmGetMagic(psc->fd, &magic)) {
  1201.       ErrorMessageF("failed to get magic\n");
  1202.       goto handle_error;
  1203.    }
  1204.  
  1205.    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
  1206.       ErrorMessageF("failed to authenticate magic %d\n", magic);
  1207.       goto handle_error;
  1208.    }
  1209.  
  1210.    /* If Mesa knows about the appropriate driver for this fd, then trust it.
  1211.     * Otherwise, default to the server's value.
  1212.     */
  1213.    loader_driverName = loader_get_driver_for_fd(psc->fd, 0);
  1214.    if (loader_driverName) {
  1215.       free(driverName);
  1216.       driverName = loader_driverName;
  1217.    }
  1218.  
  1219.    psc->driver = driOpenDriver(driverName);
  1220.    if (psc->driver == NULL) {
  1221.       ErrorMessageF("driver pointer missing\n");
  1222.       goto handle_error;
  1223.    }
  1224.  
  1225.    extensions = driGetDriverExtensions(psc->driver, driverName);
  1226.    if (extensions == NULL)
  1227.       goto handle_error;
  1228.  
  1229.    for (i = 0; extensions[i]; i++) {
  1230.       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
  1231.          psc->core = (__DRIcoreExtension *) extensions[i];
  1232.       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
  1233.          psc->dri2 = (__DRIdri2Extension *) extensions[i];
  1234.    }
  1235.  
  1236.    if (psc->core == NULL || psc->dri2 == NULL) {
  1237.       ErrorMessageF("core dri or dri2 extension not found\n");
  1238.       goto handle_error;
  1239.    }
  1240.  
  1241.    if (psc->dri2->base.version >= 4) {
  1242.       psc->driScreen =
  1243.          psc->dri2->createNewScreen2(screen, psc->fd,
  1244.                                      (const __DRIextension **)
  1245.                                      &pdp->loader_extensions[0],
  1246.                                      extensions,
  1247.                                      &driver_configs, psc);
  1248.    } else {
  1249.       psc->driScreen =
  1250.          psc->dri2->createNewScreen(screen, psc->fd,
  1251.                                     (const __DRIextension **)
  1252.                                     &pdp->loader_extensions[0],
  1253.                                     &driver_configs, psc);
  1254.    }
  1255.  
  1256.    if (psc->driScreen == NULL) {
  1257.       ErrorMessageF("failed to create dri screen\n");
  1258.       goto handle_error;
  1259.    }
  1260.  
  1261.    dri2BindExtensions(psc, priv, driverName);
  1262.  
  1263.    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
  1264.    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
  1265.  
  1266.    if (!configs || !visuals) {
  1267.        ErrorMessageF("No matching fbConfigs or visuals found\n");
  1268.        goto handle_error;
  1269.    }
  1270.  
  1271.    glx_config_destroy_list(psc->base.configs);
  1272.    psc->base.configs = configs;
  1273.    glx_config_destroy_list(psc->base.visuals);
  1274.    psc->base.visuals = visuals;
  1275.  
  1276.    psc->driver_configs = driver_configs;
  1277.  
  1278.    psc->base.vtable = &dri2_screen_vtable;
  1279.    psp = &psc->vtable;
  1280.    psc->base.driScreen = psp;
  1281.    psp->destroyScreen = dri2DestroyScreen;
  1282.    psp->createDrawable = dri2CreateDrawable;
  1283.    psp->swapBuffers = dri2SwapBuffers;
  1284.    psp->getDrawableMSC = NULL;
  1285.    psp->waitForMSC = NULL;
  1286.    psp->waitForSBC = NULL;
  1287.    psp->setSwapInterval = NULL;
  1288.    psp->getSwapInterval = NULL;
  1289.    psp->getBufferAge = NULL;
  1290.  
  1291.    if (pdp->driMinor >= 2) {
  1292.       psp->getDrawableMSC = dri2DrawableGetMSC;
  1293.       psp->waitForMSC = dri2WaitForMSC;
  1294.       psp->waitForSBC = dri2WaitForSBC;
  1295.       psp->setSwapInterval = dri2SetSwapInterval;
  1296.       psp->getSwapInterval = dri2GetSwapInterval;
  1297.       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
  1298.    }
  1299.  
  1300.    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
  1301.     * available.*/
  1302.    psp->copySubBuffer = dri2CopySubBuffer;
  1303.    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
  1304.  
  1305.    free(driverName);
  1306.    free(deviceName);
  1307.  
  1308.    tmp = getenv("LIBGL_SHOW_FPS");
  1309.    psc->show_fps_interval = (tmp) ? atoi(tmp) : 0;
  1310.    if (psc->show_fps_interval < 0)
  1311.       psc->show_fps_interval = 0;
  1312.  
  1313.    InfoMessageF("Using DRI2 for screen %d\n", screen);
  1314.  
  1315.    return &psc->base;
  1316.  
  1317. handle_error:
  1318.    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
  1319.  
  1320.    if (configs)
  1321.        glx_config_destroy_list(configs);
  1322.    if (visuals)
  1323.        glx_config_destroy_list(visuals);
  1324.    if (psc->driScreen)
  1325.        psc->core->destroyScreen(psc->driScreen);
  1326.    psc->driScreen = NULL;
  1327.    if (psc->fd >= 0)
  1328.       close(psc->fd);
  1329.    if (psc->driver)
  1330.       dlclose(psc->driver);
  1331.  
  1332.    free(driverName);
  1333.    free(deviceName);
  1334.    glx_screen_cleanup(&psc->base);
  1335.    free(psc);
  1336.  
  1337.    return NULL;
  1338. }
  1339.  
  1340. /* Called from __glXFreeDisplayPrivate.
  1341.  */
  1342. static void
  1343. dri2DestroyDisplay(__GLXDRIdisplay * dpy)
  1344. {
  1345.    struct dri2_display *pdp = (struct dri2_display *) dpy;
  1346.  
  1347.    __glxHashDestroy(pdp->dri2Hash);
  1348.    free(dpy);
  1349. }
  1350.  
  1351. _X_HIDDEN __GLXDRIdrawable *
  1352. dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
  1353. {
  1354.    struct glx_display *d = __glXInitialize(dpy);
  1355.    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
  1356.    __GLXDRIdrawable *pdraw;
  1357.  
  1358.    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
  1359.       return pdraw;
  1360.  
  1361.    return NULL;
  1362. }
  1363.  
  1364. /*
  1365.  * Allocate, initialize and return a __DRIdisplayPrivate object.
  1366.  * This is called from __glXInitialize() when we are given a new
  1367.  * display pointer.
  1368.  */
  1369. _X_HIDDEN __GLXDRIdisplay *
  1370. dri2CreateDisplay(Display * dpy)
  1371. {
  1372.    struct dri2_display *pdp;
  1373.    int eventBase, errorBase, i;
  1374.  
  1375.    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
  1376.       return NULL;
  1377.  
  1378.    pdp = malloc(sizeof *pdp);
  1379.    if (pdp == NULL)
  1380.       return NULL;
  1381.  
  1382.    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
  1383.       free(pdp);
  1384.       return NULL;
  1385.    }
  1386.  
  1387.    pdp->driPatch = 0;
  1388.    pdp->swapAvailable = (pdp->driMinor >= 2);
  1389.    pdp->invalidateAvailable = (pdp->driMinor >= 3);
  1390.  
  1391.    pdp->base.destroyDisplay = dri2DestroyDisplay;
  1392.    pdp->base.createScreen = dri2CreateScreen;
  1393.  
  1394.    i = 0;
  1395.    if (pdp->driMinor < 1)
  1396.       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
  1397.    else
  1398.       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
  1399.    
  1400.    pdp->loader_extensions[i++] = &systemTimeExtension.base;
  1401.  
  1402.    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
  1403.  
  1404.    pdp->loader_extensions[i++] = NULL;
  1405.  
  1406.    pdp->dri2Hash = __glxHashCreate();
  1407.    if (pdp->dri2Hash == NULL) {
  1408.       free(pdp);
  1409.       return NULL;
  1410.    }
  1411.  
  1412.    return &pdp->base;
  1413. }
  1414.  
  1415. #endif /* GLX_DIRECT_RENDERING */
  1416.