| /* |
| * 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 <fcntl.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #include <X11/xshmfence.h> |
| #include <xcb/xcb.h> |
| #include <xcb/dri3.h> |
| #include <xcb/present.h> |
| |
| #include <X11/Xlib-xcb.h> |
| |
| #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) |
| { |
| draw->num_back = 1; |
| if (draw->flipping) { |
| if (!draw->is_pixmap && |
| !(draw->present_capabilities & XCB_PRESENT_CAPABILITY_ASYNC)) |
| draw->num_back++; |
| draw->num_back++; |
| } |
| if (draw->vtable->get_swap_interval(draw) == 0) |
| draw->num_back++; |
| } |
| |
| 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_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, |
| 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 <target_sbc> = 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 <divisor> = 0, the swap will occur when MSC becomes |
| * greater than or equal to <target_msc>." |
| * |
| * 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 <interval> 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]; |
| 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; |
| |
| 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; |
| |
| buffer->image = loader_dri3_create_image(draw->conn, bp_reply, format, |
| draw->dri_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; |
| } |