/* * Copyright © 2013 Keith Packard * Copyright © 2015 Boyan Ding * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include "loader_dri3_helper.h" /* From xmlpool/options.h, user exposed so should be stable */ #define DRI_CONF_VBLANK_NEVER 0 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3 static inline void dri3_fence_reset(xcb_connection_t *c, struct loader_dri3_buffer *buffer) { xshmfence_reset(buffer->shm_fence); } static inline void dri3_fence_set(struct loader_dri3_buffer *buffer) { xshmfence_trigger(buffer->shm_fence); } static inline void dri3_fence_trigger(xcb_connection_t *c, struct loader_dri3_buffer *buffer) { xcb_sync_trigger_fence(c, buffer->sync_fence); } static inline void dri3_fence_await(xcb_connection_t *c, struct loader_dri3_buffer *buffer) { xcb_flush(c); xshmfence_await(buffer->shm_fence); } static void dri3_update_num_back(struct loader_dri3_drawable *draw) { if (draw->flipping) draw->num_back = 3; else draw->num_back = 2; } void loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval) { interval = draw->vtable->clamp_swap_interval(draw, interval); draw->vtable->set_swap_interval(draw, interval); dri3_update_num_back(draw); } /** dri3_free_render_buffer * * Free everything associated with one render buffer including pixmap, fence * stuff and the driver image */ static void dri3_free_render_buffer(struct loader_dri3_drawable *draw, struct loader_dri3_buffer *buffer) { if (buffer->own_pixmap) xcb_free_pixmap(draw->conn, buffer->pixmap); xcb_sync_destroy_fence(draw->conn, buffer->sync_fence); xshmfence_unmap_shm(buffer->shm_fence); draw->ext->image->destroyImage(buffer->image); if (buffer->linear_buffer) draw->ext->image->destroyImage(buffer->linear_buffer); free(buffer); } void loader_dri3_drawable_fini(struct loader_dri3_drawable *draw) { int i; draw->ext->core->destroyDrawable(draw->dri_drawable); for (i = 0; i < LOADER_DRI3_NUM_BUFFERS; i++) { if (draw->buffers[i]) dri3_free_render_buffer(draw, draw->buffers[i]); } if (draw->special_event) { xcb_void_cookie_t cookie = xcb_present_select_input_checked(draw->conn, draw->eid, draw->drawable, XCB_PRESENT_EVENT_MASK_NO_EVENT); xcb_discard_reply(draw->conn, cookie.sequence); xcb_unregister_for_special_event(draw->conn, draw->special_event); } } int loader_dri3_drawable_init(xcb_connection_t *conn, xcb_drawable_t drawable, __DRIscreen *dri_screen, bool is_different_gpu, const __DRIconfig *dri_config, struct loader_dri3_extensions *ext, const struct loader_dri3_vtable *vtable, struct loader_dri3_drawable *draw) { xcb_get_geometry_cookie_t cookie; xcb_get_geometry_reply_t *reply; xcb_generic_error_t *error; GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1; int swap_interval; draw->conn = conn; draw->ext = ext; draw->vtable = vtable; draw->drawable = drawable; draw->dri_screen = dri_screen; draw->is_different_gpu = is_different_gpu; draw->have_back = 0; draw->have_fake_front = 0; draw->first_init = true; if (draw->ext->config) draw->ext->config->configQueryi(draw->dri_screen, "vblank_mode", &vblank_mode); switch (vblank_mode) { case DRI_CONF_VBLANK_NEVER: case DRI_CONF_VBLANK_DEF_INTERVAL_0: swap_interval = 0; break; case DRI_CONF_VBLANK_DEF_INTERVAL_1: case DRI_CONF_VBLANK_ALWAYS_SYNC: default: swap_interval = 1; break; } draw->vtable->set_swap_interval(draw, swap_interval); dri3_update_num_back(draw); /* Create a new drawable */ draw->dri_drawable = draw->ext->image_driver->createNewDrawable(dri_screen, dri_config, draw); if (!draw->dri_drawable) return 1; cookie = xcb_get_geometry(draw->conn, draw->drawable); reply = xcb_get_geometry_reply(draw->conn, cookie, &error); if (reply == NULL || error != NULL) { draw->ext->core->destroyDrawable(draw->dri_drawable); return 1; } draw->width = reply->width; draw->height = reply->height; draw->depth = reply->depth; draw->vtable->set_drawable_size(draw, draw->width, draw->height); free(reply); /* * Make sure server has the same swap interval we do for the new * drawable. */ loader_dri3_set_swap_interval(draw, swap_interval); return 0; } /* * Process one Present event */ static void dri3_handle_present_event(struct loader_dri3_drawable *draw, xcb_present_generic_event_t *ge) { switch (ge->evtype) { case XCB_PRESENT_CONFIGURE_NOTIFY: { xcb_present_configure_notify_event_t *ce = (void *) ge; draw->width = ce->width; draw->height = ce->height; draw->vtable->set_drawable_size(draw, draw->width, draw->height); break; } case XCB_PRESENT_COMPLETE_NOTIFY: { xcb_present_complete_notify_event_t *ce = (void *) ge; /* Compute the processed SBC number from the received 32-bit serial number * merged with the upper 32-bits of the sent 64-bit serial number while * checking for wrap. */ if (ce->kind == XCB_PRESENT_COMPLETE_KIND_PIXMAP) { draw->recv_sbc = (draw->send_sbc & 0xffffffff00000000LL) | ce->serial; if (draw->recv_sbc > draw->send_sbc) draw->recv_sbc -= 0x100000000; switch (ce->mode) { case XCB_PRESENT_COMPLETE_MODE_FLIP: draw->flipping = true; break; case XCB_PRESENT_COMPLETE_MODE_COPY: draw->flipping = false; break; } dri3_update_num_back(draw); if (draw->vtable->show_fps) draw->vtable->show_fps(draw, ce->ust); draw->ust = ce->ust; draw->msc = ce->msc; } else { draw->recv_msc_serial = ce->serial; draw->notify_ust = ce->ust; draw->notify_msc = ce->msc; } break; } case XCB_PRESENT_EVENT_IDLE_NOTIFY: { xcb_present_idle_notify_event_t *ie = (void *) ge; int b; for (b = 0; b < sizeof(draw->buffers) / sizeof(draw->buffers[0]); b++) { struct loader_dri3_buffer *buf = draw->buffers[b]; if (buf && buf->pixmap == ie->pixmap) { buf->busy = 0; if (draw->num_back <= b && b < LOADER_DRI3_MAX_BACK) { dri3_free_render_buffer(draw, buf); draw->buffers[b] = NULL; } break; } } break; } } free(ge); } static bool dri3_wait_for_event(struct loader_dri3_drawable *draw) { xcb_generic_event_t *ev; xcb_present_generic_event_t *ge; xcb_flush(draw->conn); ev = xcb_wait_for_special_event(draw->conn, draw->special_event); if (!ev) return false; ge = (void *) ev; dri3_handle_present_event(draw, ge); return true; } /** loader_dri3_wait_for_msc * * Get the X server to send an event when the target msc/divisor/remainder is * reached. */ bool loader_dri3_wait_for_msc(struct loader_dri3_drawable *draw, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc) { uint32_t msc_serial; msc_serial = ++draw->send_msc_serial; xcb_present_notify_msc(draw->conn, draw->drawable, msc_serial, target_msc, divisor, remainder); xcb_flush(draw->conn); /* Wait for the event */ if (draw->special_event) { while ((int32_t) (msc_serial - draw->recv_msc_serial) > 0) { if (!dri3_wait_for_event(draw)) return false; } } *ust = draw->notify_ust; *msc = draw->notify_msc; *sbc = draw->recv_sbc; return true; } /** loader_dri3_wait_for_sbc * * Wait for the completed swap buffer count to reach the specified * target. Presumably the application knows that this will be reached with * outstanding complete events, or we're going to be here awhile. */ int loader_dri3_wait_for_sbc(struct loader_dri3_drawable *draw, int64_t target_sbc, int64_t *ust, int64_t *msc, int64_t *sbc) { /* From the GLX_OML_sync_control spec: * * "If = 0, the function will block until all previous * swaps requested with glXSwapBuffersMscOML for that window have * completed." */ if (!target_sbc) target_sbc = draw->send_sbc; while (draw->recv_sbc < target_sbc) { if (!dri3_wait_for_event(draw)) return 0; } *ust = draw->ust; *msc = draw->msc; *sbc = draw->recv_sbc; return 1; } /** loader_dri3_find_back * * Find an idle back buffer. If there isn't one, then * wait for a present idle notify event from the X server */ static int dri3_find_back(struct loader_dri3_drawable *draw) { int b; xcb_generic_event_t *ev; xcb_present_generic_event_t *ge; for (;;) { for (b = 0; b < draw->num_back; b++) { int id = LOADER_DRI3_BACK_ID((b + draw->cur_back) % draw->num_back); struct loader_dri3_buffer *buffer = draw->buffers[id]; if (!buffer || !buffer->busy) { draw->cur_back = id; return id; } } xcb_flush(draw->conn); ev = xcb_wait_for_special_event(draw->conn, draw->special_event); if (!ev) return -1; ge = (void *) ev; dri3_handle_present_event(draw, ge); } } static xcb_gcontext_t dri3_drawable_gc(struct loader_dri3_drawable *draw) { if (!draw->gc) { uint32_t v = 0; xcb_create_gc(draw->conn, (draw->gc = xcb_generate_id(draw->conn)), draw->drawable, XCB_GC_GRAPHICS_EXPOSURES, &v); } return draw->gc; } static struct loader_dri3_buffer * dri3_back_buffer(struct loader_dri3_drawable *draw) { return draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)]; } static struct loader_dri3_buffer * dri3_fake_front_buffer(struct loader_dri3_drawable *draw) { return draw->buffers[LOADER_DRI3_FRONT_ID]; } static void dri3_copy_area(xcb_connection_t *c, xcb_drawable_t src_drawable, xcb_drawable_t dst_drawable, xcb_gcontext_t gc, int16_t src_x, int16_t src_y, int16_t dst_x, int16_t dst_y, uint16_t width, uint16_t height) { xcb_void_cookie_t cookie; cookie = xcb_copy_area_checked(c, src_drawable, dst_drawable, gc, src_x, src_y, dst_x, dst_y, width, height); xcb_discard_reply(c, cookie.sequence); } /** * Asks the driver to flush any queued work necessary for serializing with the * X command stream, and optionally the slightly more strict requirement of * glFlush() equivalence (which would require flushing even if nothing had * been drawn to a window system framebuffer, for example). */ void loader_dri3_flush(struct loader_dri3_drawable *draw, unsigned flags, enum __DRI2throttleReason throttle_reason) { /* NEED TO CHECK WHETHER CONTEXT IS NULL */ __DRIcontext *dri_context = draw->vtable->get_dri_context(draw); if (dri_context) { draw->ext->flush->flush_with_flags(dri_context, draw->dri_drawable, flags, throttle_reason); } } void loader_dri3_copy_sub_buffer(struct loader_dri3_drawable *draw, int x, int y, int width, int height, bool flush) { struct loader_dri3_buffer *back; unsigned flags = __DRI2_FLUSH_DRAWABLE; __DRIcontext *dri_context; dri_context = draw->vtable->get_dri_context(draw); /* Check we have the right attachments */ if (!draw->have_back || draw->is_pixmap) return; if (flush) flags |= __DRI2_FLUSH_CONTEXT; loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER); back = dri3_back_buffer(draw); y = draw->height - y - height; if (draw->is_different_gpu && draw->vtable->in_current_context(draw)) { /* Update the linear buffer part of the back buffer * for the dri3_copy_area operation */ draw->ext->image->blitImage(dri_context, back->linear_buffer, back->image, 0, 0, back->width, back->height, 0, 0, back->width, back->height, __BLIT_FLAG_FLUSH); /* We use blitImage to update our fake front, */ if (draw->have_fake_front) draw->ext->image->blitImage(dri_context, dri3_fake_front_buffer(draw)->image, back->image, x, y, width, height, x, y, width, height, __BLIT_FLAG_FLUSH); } dri3_fence_reset(draw->conn, back); dri3_copy_area(draw->conn, dri3_back_buffer(draw)->pixmap, draw->drawable, dri3_drawable_gc(draw), x, y, x, y, width, height); dri3_fence_trigger(draw->conn, back); /* Refresh the fake front (if present) after we just damaged the real * front. */ if (draw->have_fake_front && !draw->is_different_gpu) { dri3_fence_reset(draw->conn, dri3_fake_front_buffer(draw)); dri3_copy_area(draw->conn, dri3_back_buffer(draw)->pixmap, dri3_fake_front_buffer(draw)->pixmap, dri3_drawable_gc(draw), x, y, x, y, width, height); dri3_fence_trigger(draw->conn, dri3_fake_front_buffer(draw)); dri3_fence_await(draw->conn, dri3_fake_front_buffer(draw)); } dri3_fence_await(draw->conn, back); } void loader_dri3_copy_drawable(struct loader_dri3_drawable *draw, xcb_drawable_t dest, xcb_drawable_t src) { loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, 0); dri3_fence_reset(draw->conn, dri3_fake_front_buffer(draw)); dri3_copy_area(draw->conn, src, dest, dri3_drawable_gc(draw), 0, 0, 0, 0, draw->width, draw->height); dri3_fence_trigger(draw->conn, dri3_fake_front_buffer(draw)); dri3_fence_await(draw->conn, dri3_fake_front_buffer(draw)); } void loader_dri3_wait_x(struct loader_dri3_drawable *draw) { struct loader_dri3_buffer *front; __DRIcontext *dri_context; if (draw == NULL || !draw->have_fake_front) return; front = dri3_fake_front_buffer(draw); dri_context = draw->vtable->get_dri_context(draw); loader_dri3_copy_drawable(draw, front->pixmap, draw->drawable); /* In the psc->is_different_gpu case, the linear buffer has been updated, * but not yet the tiled buffer. * Copy back to the tiled buffer we use for rendering. * Note that we don't need flushing. */ if (draw->is_different_gpu && draw->vtable->in_current_context(draw)) draw->ext->image->blitImage(dri_context, front->image, front->linear_buffer, 0, 0, front->width, front->height, 0, 0, front->width, front->height, 0); } void loader_dri3_wait_gl(struct loader_dri3_drawable *draw) { struct loader_dri3_buffer *front; __DRIcontext *dri_context; if (draw == NULL || !draw->have_fake_front) return; front = dri3_fake_front_buffer(draw); dri_context = draw->vtable->get_dri_context(draw); /* In the psc->is_different_gpu case, we update the linear_buffer * before updating the real front. */ if (draw->is_different_gpu && draw->vtable->in_current_context(draw)) draw->ext->image->blitImage(dri_context, front->linear_buffer, front->image, 0, 0, front->width, front->height, 0, 0, front->width, front->height, __BLIT_FLAG_FLUSH); loader_dri3_copy_drawable(draw, draw->drawable, front->pixmap); } /** dri3_flush_present_events * * Process any present events that have been received from the X server */ static void dri3_flush_present_events(struct loader_dri3_drawable *draw) { /* Check to see if any configuration changes have occurred * since we were last invoked */ if (draw->special_event) { xcb_generic_event_t *ev; while ((ev = xcb_poll_for_special_event(draw->conn, draw->special_event)) != NULL) { xcb_present_generic_event_t *ge = (void *) ev; dri3_handle_present_event(draw, ge); } } } /** loader_dri3_swap_buffers_msc * * Make the current back buffer visible using the present extension */ int64_t loader_dri3_swap_buffers_msc(struct loader_dri3_drawable *draw, int64_t target_msc, int64_t divisor, int64_t remainder, unsigned flush_flags, bool force_copy) { struct loader_dri3_buffer *back; __DRIcontext *dri_context; int64_t ret = 0; uint32_t options = XCB_PRESENT_OPTION_NONE; int swap_interval; dri_context = draw->vtable->get_dri_context(draw); swap_interval = draw->vtable->get_swap_interval(draw); draw->vtable->flush_drawable(draw, flush_flags); back = draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)]; if (draw->is_different_gpu && back) { /* Update the linear buffer before presenting the pixmap */ draw->ext->image->blitImage(dri_context, back->linear_buffer, back->image, 0, 0, back->width, back->height, 0, 0, back->width, back->height, __BLIT_FLAG_FLUSH); /* Update the fake front */ if (draw->have_fake_front) draw->ext->image->blitImage(dri_context, draw->buffers[LOADER_DRI3_FRONT_ID]->image, back->image, 0, 0, draw->width, draw->height, 0, 0, draw->width, draw->height, __BLIT_FLAG_FLUSH); } dri3_flush_present_events(draw); if (back && !draw->is_pixmap) { dri3_fence_reset(draw->conn, back); /* Compute when we want the frame shown by taking the last known * successful MSC and adding in a swap interval for each outstanding swap * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers() * semantic" */ ++draw->send_sbc; if (target_msc == 0 && divisor == 0 && remainder == 0) target_msc = draw->msc + swap_interval * (draw->send_sbc - draw->recv_sbc); else if (divisor == 0 && remainder > 0) { /* From the GLX_OML_sync_control spec: * "If = 0, the swap will occur when MSC becomes * greater than or equal to ." * * Note that there's no mention of the remainder. The Present * extension throws BadValue for remainder != 0 with divisor == 0, so * just drop the passed in value. */ remainder = 0; } /* From the GLX_EXT_swap_control spec * and the EGL 1.4 spec (page 53): * * "If is set to a value of 0, buffer swaps are not * synchronized to a video frame." * * Implementation note: It is possible to enable triple buffering * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be * the default. */ if (swap_interval == 0) options |= XCB_PRESENT_OPTION_ASYNC; if (force_copy) options |= XCB_PRESENT_OPTION_COPY; back->busy = 1; back->last_swap = draw->send_sbc; xcb_present_pixmap(draw->conn, draw->drawable, back->pixmap, (uint32_t) draw->send_sbc, 0, /* valid */ 0, /* update */ 0, /* x_off */ 0, /* y_off */ None, /* target_crtc */ None, back->sync_fence, options, target_msc, divisor, remainder, 0, NULL); ret = (int64_t) draw->send_sbc; /* If there's a fake front, then copy the source back buffer * to the fake front to keep it up to date. This needs * to reset the fence and make future users block until * the X server is done copying the bits */ if (draw->have_fake_front && !draw->is_different_gpu) { dri3_fence_reset(draw->conn, draw->buffers[LOADER_DRI3_FRONT_ID]); dri3_copy_area(draw->conn, back->pixmap, draw->buffers[LOADER_DRI3_FRONT_ID]->pixmap, dri3_drawable_gc(draw), 0, 0, 0, 0, draw->width, draw->height); dri3_fence_trigger(draw->conn, draw->buffers[LOADER_DRI3_FRONT_ID]); } xcb_flush(draw->conn); if (draw->stamp) ++(*draw->stamp); } draw->ext->flush->invalidate(draw->dri_drawable); return ret; } int loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw) { int back_id = LOADER_DRI3_BACK_ID(dri3_find_back(draw)); if (back_id < 0 || !draw->buffers[back_id]) return 0; if (draw->buffers[back_id]->last_swap != 0) return draw->send_sbc - draw->buffers[back_id]->last_swap + 1; else return 0; } /** loader_dri3_open * * Wrapper around xcb_dri3_open */ int loader_dri3_open(xcb_connection_t *conn, xcb_window_t root, uint32_t provider) { xcb_dri3_open_cookie_t cookie; xcb_dri3_open_reply_t *reply; int fd; cookie = xcb_dri3_open(conn, root, provider); reply = xcb_dri3_open_reply(conn, cookie, NULL); if (!reply) return -1; if (reply->nfd != 1) { free(reply); return -1; } fd = xcb_dri3_open_reply_fds(conn, reply)[0]; free(reply); fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); return fd; } static uint32_t dri3_cpp_for_format(uint32_t format) { switch (format) { case __DRI_IMAGE_FORMAT_R8: return 1; case __DRI_IMAGE_FORMAT_RGB565: case __DRI_IMAGE_FORMAT_GR88: return 2; case __DRI_IMAGE_FORMAT_XRGB8888: case __DRI_IMAGE_FORMAT_ARGB8888: case __DRI_IMAGE_FORMAT_ABGR8888: case __DRI_IMAGE_FORMAT_XBGR8888: case __DRI_IMAGE_FORMAT_XRGB2101010: case __DRI_IMAGE_FORMAT_ARGB2101010: case __DRI_IMAGE_FORMAT_SARGB8: return 4; case __DRI_IMAGE_FORMAT_NONE: default: return 0; } } /** loader_dri3_alloc_render_buffer * * Use the driver createImage function to construct a __DRIimage, then * get a file descriptor for that and create an X pixmap from that * * Allocate an xshmfence for synchronization */ static struct loader_dri3_buffer * dri3_alloc_render_buffer(struct loader_dri3_drawable *draw, unsigned int format, int width, int height, int depth) { struct loader_dri3_buffer *buffer; __DRIimage *pixmap_buffer; xcb_pixmap_t pixmap; xcb_sync_fence_t sync_fence; struct xshmfence *shm_fence; int buffer_fd, fence_fd; int stride; /* Create an xshmfence object and * prepare to send that to the X server */ fence_fd = xshmfence_alloc_shm(); if (fence_fd < 0) return NULL; shm_fence = xshmfence_map_shm(fence_fd); if (shm_fence == NULL) goto no_shm_fence; /* Allocate the image from the driver */ buffer = calloc(1, sizeof *buffer); if (!buffer) goto no_buffer; buffer->cpp = dri3_cpp_for_format(format); if (!buffer->cpp) goto no_image; if (!draw->is_different_gpu) { buffer->image = draw->ext->image->createImage(draw->dri_screen, width, height, format, __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_SCANOUT | __DRI_IMAGE_USE_BACKBUFFER, buffer); pixmap_buffer = buffer->image; if (!buffer->image) goto no_image; } else { buffer->image = draw->ext->image->createImage(draw->dri_screen, width, height, format, 0, buffer); if (!buffer->image) goto no_image; buffer->linear_buffer = draw->ext->image->createImage(draw->dri_screen, width, height, format, __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_LINEAR | __DRI_IMAGE_USE_BACKBUFFER, buffer); pixmap_buffer = buffer->linear_buffer; if (!buffer->linear_buffer) goto no_linear_buffer; } /* X wants the stride, so ask the image for it */ if (!draw->ext->image->queryImage(pixmap_buffer, __DRI_IMAGE_ATTRIB_STRIDE, &stride)) goto no_buffer_attrib; buffer->pitch = stride; if (!draw->ext->image->queryImage(pixmap_buffer, __DRI_IMAGE_ATTRIB_FD, &buffer_fd)) goto no_buffer_attrib; xcb_dri3_pixmap_from_buffer(draw->conn, (pixmap = xcb_generate_id(draw->conn)), draw->drawable, buffer->size, width, height, buffer->pitch, depth, buffer->cpp * 8, buffer_fd); xcb_dri3_fence_from_fd(draw->conn, pixmap, (sync_fence = xcb_generate_id(draw->conn)), false, fence_fd); buffer->pixmap = pixmap; buffer->own_pixmap = true; buffer->sync_fence = sync_fence; buffer->shm_fence = shm_fence; buffer->width = width; buffer->height = height; /* Mark the buffer as idle */ dri3_fence_set(buffer); return buffer; no_buffer_attrib: draw->ext->image->destroyImage(pixmap_buffer); no_linear_buffer: if (draw->is_different_gpu) draw->ext->image->destroyImage(buffer->image); no_image: free(buffer); no_buffer: xshmfence_unmap_shm(shm_fence); no_shm_fence: close(fence_fd); return NULL; } /** loader_dri3_update_drawable * * Called the first time we use the drawable and then * after we receive present configure notify events to * track the geometry of the drawable */ static int dri3_update_drawable(__DRIdrawable *driDrawable, struct loader_dri3_drawable *draw) { if (draw->first_init) { xcb_get_geometry_cookie_t geom_cookie; xcb_get_geometry_reply_t *geom_reply; xcb_void_cookie_t cookie; xcb_generic_error_t *error; xcb_present_query_capabilities_cookie_t present_capabilities_cookie; xcb_present_query_capabilities_reply_t *present_capabilities_reply; draw->first_init = false; /* Try to select for input on the window. * * If the drawable is a window, this will get our events * delivered. * * Otherwise, we'll get a BadWindow error back from this request which * will let us know that the drawable is a pixmap instead. */ draw->eid = xcb_generate_id(draw->conn); cookie = xcb_present_select_input_checked(draw->conn, draw->eid, draw->drawable, XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY | XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY | XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY); present_capabilities_cookie = xcb_present_query_capabilities(draw->conn, draw->drawable); /* Create an XCB event queue to hold present events outside of the usual * application event queue */ draw->special_event = xcb_register_for_special_xge(draw->conn, &xcb_present_id, draw->eid, draw->stamp); geom_cookie = xcb_get_geometry(draw->conn, draw->drawable); geom_reply = xcb_get_geometry_reply(draw->conn, geom_cookie, NULL); if (!geom_reply) return false; draw->width = geom_reply->width; draw->height = geom_reply->height; draw->depth = geom_reply->depth; draw->vtable->set_drawable_size(draw, draw->width, draw->height); free(geom_reply); draw->is_pixmap = false; /* Check to see if our select input call failed. If it failed with a * BadWindow error, then assume the drawable is a pixmap. Destroy the * special event queue created above and mark the drawable as a pixmap */ error = xcb_request_check(draw->conn, cookie); present_capabilities_reply = xcb_present_query_capabilities_reply(draw->conn, present_capabilities_cookie, NULL); if (present_capabilities_reply) { draw->present_capabilities = present_capabilities_reply->capabilities; free(present_capabilities_reply); } else draw->present_capabilities = 0; if (error) { if (error->error_code != BadWindow) { free(error); return false; } draw->is_pixmap = true; xcb_unregister_for_special_event(draw->conn, draw->special_event); draw->special_event = NULL; } } dri3_flush_present_events(draw); return true; } /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds */ static int image_format_to_fourcc(int format) { /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */ switch (format) { case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888; case __DRI_IMAGE_FORMAT_RGB565: return __DRI_IMAGE_FOURCC_RGB565; case __DRI_IMAGE_FORMAT_XRGB8888: return __DRI_IMAGE_FOURCC_XRGB8888; case __DRI_IMAGE_FORMAT_ARGB8888: return __DRI_IMAGE_FOURCC_ARGB8888; case __DRI_IMAGE_FORMAT_ABGR8888: return __DRI_IMAGE_FOURCC_ABGR8888; case __DRI_IMAGE_FORMAT_XBGR8888: return __DRI_IMAGE_FOURCC_XBGR8888; } return 0; } __DRIimage * loader_dri3_create_image(xcb_connection_t *c, xcb_dri3_buffer_from_pixmap_reply_t *bp_reply, unsigned int format, __DRIscreen *dri_screen, const __DRIimageExtension *image, void *loaderPrivate) { int *fds; __DRIimage *image_planar, *ret; int stride, offset; /* Get an FD for the pixmap object */ fds = xcb_dri3_buffer_from_pixmap_reply_fds(c, bp_reply); stride = bp_reply->stride; offset = 0; /* createImageFromFds creates a wrapper __DRIimage structure which * can deal with multiple planes for things like Yuv images. So, once * we've gotten the planar wrapper, pull the single plane out of it and * discard the wrapper. */ image_planar = image->createImageFromFds(dri_screen, bp_reply->width, bp_reply->height, image_format_to_fourcc(format), fds, 1, &stride, &offset, loaderPrivate); close(fds[0]); if (!image_planar) return NULL; ret = image->fromPlanar(image_planar, 0, loaderPrivate); image->destroyImage(image_planar); return ret; } /** dri3_get_pixmap_buffer * * Get the DRM object for a pixmap from the X server and * wrap that with a __DRIimage structure using createImageFromFds */ static struct loader_dri3_buffer * dri3_get_pixmap_buffer(__DRIdrawable *driDrawable, unsigned int format, enum loader_dri3_buffer_type buffer_type, struct loader_dri3_drawable *draw) { int buf_id = loader_dri3_pixmap_buf_id(buffer_type); struct loader_dri3_buffer *buffer = draw->buffers[buf_id]; xcb_drawable_t pixmap; xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie; xcb_dri3_buffer_from_pixmap_reply_t *bp_reply; xcb_sync_fence_t sync_fence; struct xshmfence *shm_fence; int fence_fd; __DRIscreen *cur_screen; if (buffer) return buffer; pixmap = draw->drawable; buffer = calloc(1, sizeof *buffer); if (!buffer) goto no_buffer; fence_fd = xshmfence_alloc_shm(); if (fence_fd < 0) goto no_fence; shm_fence = xshmfence_map_shm(fence_fd); if (shm_fence == NULL) { close (fence_fd); goto no_fence; } xcb_dri3_fence_from_fd(draw->conn, pixmap, (sync_fence = xcb_generate_id(draw->conn)), false, fence_fd); bp_cookie = xcb_dri3_buffer_from_pixmap(draw->conn, pixmap); bp_reply = xcb_dri3_buffer_from_pixmap_reply(draw->conn, bp_cookie, NULL); if (!bp_reply) goto no_image; /* Get the currently-bound screen or revert to using the drawable's screen if * no contexts are currently bound. The latter case is at least necessary for * obs-studio, when using Window Capture (Xcomposite) as a Source. */ cur_screen = draw->vtable->get_dri_screen(draw); if (!cur_screen) { cur_screen = draw->dri_screen; } buffer->image = loader_dri3_create_image(draw->conn, bp_reply, format, cur_screen, draw->ext->image, buffer); if (!buffer->image) goto no_image; buffer->pixmap = pixmap; buffer->own_pixmap = false; buffer->width = bp_reply->width; buffer->height = bp_reply->height; buffer->buffer_type = buffer_type; buffer->shm_fence = shm_fence; buffer->sync_fence = sync_fence; draw->buffers[buf_id] = buffer; free(bp_reply); return buffer; no_image: free(bp_reply); xcb_sync_destroy_fence(draw->conn, sync_fence); xshmfence_unmap_shm(shm_fence); no_fence: free(buffer); no_buffer: return NULL; } /** dri3_get_buffer * * Find a front or back buffer, allocating new ones as necessary */ static struct loader_dri3_buffer * dri3_get_buffer(__DRIdrawable *driDrawable, unsigned int format, enum loader_dri3_buffer_type buffer_type, struct loader_dri3_drawable *draw) { struct loader_dri3_buffer *buffer; int buf_id; __DRIcontext *dri_context; dri_context = draw->vtable->get_dri_context(draw); if (buffer_type == loader_dri3_buffer_back) { buf_id = dri3_find_back(draw); if (buf_id < 0) return NULL; } else { buf_id = LOADER_DRI3_FRONT_ID; } buffer = draw->buffers[buf_id]; /* Allocate a new buffer if there isn't an old one, or if that * old one is the wrong size */ if (!buffer || buffer->width != draw->width || buffer->height != draw->height) { struct loader_dri3_buffer *new_buffer; /* Allocate the new buffers */ new_buffer = dri3_alloc_render_buffer(draw, format, draw->width, draw->height, draw->depth); if (!new_buffer) return NULL; /* When resizing, copy the contents of the old buffer, waiting for that * copy to complete using our fences before proceeding */ switch (buffer_type) { case loader_dri3_buffer_back: if (buffer) { if (!buffer->linear_buffer) { dri3_fence_reset(draw->conn, new_buffer); dri3_fence_await(draw->conn, buffer); dri3_copy_area(draw->conn, buffer->pixmap, new_buffer->pixmap, dri3_drawable_gc(draw), 0, 0, 0, 0, draw->width, draw->height); dri3_fence_trigger(draw->conn, new_buffer); } else if (draw->vtable->in_current_context(draw)) { draw->ext->image->blitImage(dri_context, new_buffer->image, buffer->image, 0, 0, draw->width, draw->height, 0, 0, draw->width, draw->height, 0); } dri3_free_render_buffer(draw, buffer); } break; case loader_dri3_buffer_front: dri3_fence_reset(draw->conn, new_buffer); dri3_copy_area(draw->conn, draw->drawable, new_buffer->pixmap, dri3_drawable_gc(draw), 0, 0, 0, 0, draw->width, draw->height); dri3_fence_trigger(draw->conn, new_buffer); if (new_buffer->linear_buffer && draw->vtable->in_current_context(draw)) { dri3_fence_await(draw->conn, new_buffer); draw->ext->image->blitImage(dri_context, new_buffer->image, new_buffer->linear_buffer, 0, 0, draw->width, draw->height, 0, 0, draw->width, draw->height, 0); } break; } buffer = new_buffer; buffer->buffer_type = buffer_type; draw->buffers[buf_id] = buffer; } dri3_fence_await(draw->conn, buffer); /* Return the requested buffer */ return buffer; } /** dri3_free_buffers * * Free the front bufffer or all of the back buffers. Used * when the application changes which buffers it needs */ static void dri3_free_buffers(__DRIdrawable *driDrawable, enum loader_dri3_buffer_type buffer_type, struct loader_dri3_drawable *draw) { struct loader_dri3_buffer *buffer; int first_id; int n_id; int buf_id; switch (buffer_type) { case loader_dri3_buffer_back: first_id = LOADER_DRI3_BACK_ID(0); n_id = LOADER_DRI3_MAX_BACK; break; case loader_dri3_buffer_front: first_id = LOADER_DRI3_FRONT_ID; n_id = 1; } for (buf_id = first_id; buf_id < first_id + n_id; buf_id++) { buffer = draw->buffers[buf_id]; if (buffer) { dri3_free_render_buffer(draw, buffer); draw->buffers[buf_id] = NULL; } } } /** loader_dri3_get_buffers * * The published buffer allocation API. * Returns all of the necessary buffers, allocating * as needed. */ int loader_dri3_get_buffers(__DRIdrawable *driDrawable, unsigned int format, uint32_t *stamp, void *loaderPrivate, uint32_t buffer_mask, struct __DRIimageList *buffers) { struct loader_dri3_drawable *draw = loaderPrivate; struct loader_dri3_buffer *front, *back; buffers->image_mask = 0; buffers->front = NULL; buffers->back = NULL; front = NULL; back = NULL; if (!dri3_update_drawable(driDrawable, draw)) return false; /* pixmaps always have front buffers */ if (draw->is_pixmap) buffer_mask |= __DRI_IMAGE_BUFFER_FRONT; if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) { /* All pixmaps are owned by the server gpu. * When we use a different gpu, we can't use the pixmap * as buffer since it is potentially tiled a way * our device can't understand. In this case, use * a fake front buffer. Hopefully the pixmap * content will get synced with the fake front * buffer. */ if (draw->is_pixmap && !draw->is_different_gpu) front = dri3_get_pixmap_buffer(driDrawable, format, loader_dri3_buffer_front, draw); else front = dri3_get_buffer(driDrawable, format, loader_dri3_buffer_front, draw); if (!front) return false; } else { dri3_free_buffers(driDrawable, loader_dri3_buffer_front, draw); draw->have_fake_front = 0; } if (buffer_mask & __DRI_IMAGE_BUFFER_BACK) { back = dri3_get_buffer(driDrawable, format, loader_dri3_buffer_back, draw); if (!back) return false; draw->have_back = 1; } else { dri3_free_buffers(driDrawable, loader_dri3_buffer_back, draw); draw->have_back = 0; } if (front) { buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT; buffers->front = front->image; draw->have_fake_front = draw->is_different_gpu || !draw->is_pixmap; } if (back) { buffers->image_mask |= __DRI_IMAGE_BUFFER_BACK; buffers->back = back->image; } draw->stamp = stamp; return true; }