From: Boyan Ding <boyan.j.d...@gmail.com>
v2: From Martin Peres
- Try to fit in the 80-col limit as much as possible
v3: From Martin Peres
- introduce loader_dri3_helper.la to avoid dragging the xcb dep everywhere
(Kristian & Emil)
- get rid of the width, height, dri_screen and is_different_gpu vfuncs
(Kristian)
- replace the create/destroy functions with init/fini for dri3 drawables
- prefix static functions with dri3_ and exported ones with loader_dri3 (Emil)
- keep the function definition consistent (Emil)
Signed-off-by: Boyan Ding <boyan.j.d...@gmail.com>
Signed-off-by: Martin Peres <martin.pe...@linux.intel.com>
Reviewed-by: Kristian Høgsberg <k...@bitplanet.net>
---
configure.ac | 3 +-
src/glx/Makefile.am | 2 +
src/loader/Makefile.am | 15 +-
src/loader/loader_dri3_helper.c | 1376 +++++++++++++++++++++++++++++++++++++++
src/loader/loader_dri3_helper.h | 232 +++++++
5 files changed, 1626 insertions(+), 2 deletions(-)
create mode 100644 src/loader/loader_dri3_helper.c
create mode 100644 src/loader/loader_dri3_helper.h
diff --git a/configure.ac b/configure.ac
index 3f15881..9ea9ab2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1226,7 +1226,8 @@ xyesno)
if test x"$enable_dri3" = xyes; then
PKG_CHECK_EXISTS([xcb >= $XCB_REQUIRED], [], AC_MSG_ERROR([DRI3
requires xcb >= $XCB_REQUIRED]))
- dri_modules="$dri_modules xcb-dri3 xcb-present xcb-sync
xshmfence >= $XSHMFENCE_REQUIRED"
+ dri3_modules="xcb-dri3 xcb-present xcb-sync xshmfence >=
$XSHMFENCE_REQUIRED"
+ PKG_CHECK_MODULES([XCB_DRI3], [$dri3_modules])
fi
fi
if test x"$dri_platform" = xapple ; then
diff --git a/src/glx/Makefile.am b/src/glx/Makefile.am
index e64955e..d08ff7a 100644
--- a/src/glx/Makefile.am
+++ b/src/glx/Makefile.am
@@ -133,6 +133,8 @@ if HAVE_DRI3
libglx_la_SOURCES += \
dri3_glx.c \
dri3_priv.h
+
+libglx_la_LIBADD += $(XCB_DRI3_LIBS)
endif
if HAVE_APPLEDRI
diff --git a/src/loader/Makefile.am b/src/loader/Makefile.am
index 5190f7f..c0f7947 100644
--- a/src/loader/Makefile.am
+++ b/src/loader/Makefile.am
@@ -23,7 +23,7 @@ include Makefile.sources
EXTRA_DIST = SConscript
-noinst_LTLIBRARIES = libloader.la
+noinst_LTLIBRARIES = libloader.la libloader_dri3_helper.la
libloader_la_CPPFLAGS = \
$(DEFINES) \
@@ -55,3 +55,16 @@ libloader_la_CPPFLAGS += \
libloader_la_LIBADD += \
$(LIBDRM_LIBS)
endif
+
+if HAVE_DRI3
+libloader_dri3_helper_la_CPPFLAGS = \
+ $(DEFINES) \
+ -I$(top_srcdir)/include \
+ -I$(top_srcdir)/src \
+ $(LIBDRM_CFLAGS)
+
+libloader_dri3_helper_la_SOURCES = \
+ loader_dri3_helper.c \
+ loader_dri3_helper.h
+libloader_dri3_helper_la_LIBADD = $(XCB_DRI3_LIBS)
+endif
diff --git a/src/loader/loader_dri3_helper.c b/src/loader/loader_dri3_helper.c
new file mode 100644
index 0000000..9093b17
--- /dev/null
+++ b/src/loader/loader_dri3_helper.c
@@ -0,0 +1,1376 @@
+/*
+ * 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,
+ 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,
+ 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;
+}
+
+/** 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;
+ int *fds;
+ xcb_sync_fence_t sync_fence;
+ struct xshmfence *shm_fence;
+ int fence_fd;
+ __DRIimage *image_planar;
+ int stride, offset;
+
+ 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);
+
+ /* Get an FD for the pixmap object
+ */
+ 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;
+ fds = xcb_dri3_buffer_from_pixmap_reply_fds(draw->conn, 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 =
+ (draw->ext->image->createImageFromFds)(draw->dri_screen, bp_reply->width,
+ bp_reply->height,
+ image_format_to_fourcc(format),
+ fds, 1, &stride, &offset, buffer);
+ close(fds[0]);
+ if (!image_planar)
+ goto no_image;
+
+ buffer->image = (draw->ext->image->fromPlanar)(image_planar, 0, buffer);
+
+ (draw->ext->image->destroyImage)(image_planar);
+
+ 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;
+ return buffer;
+
+no_image:
+ 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;
+}
diff --git a/src/loader/loader_dri3_helper.h b/src/loader/loader_dri3_helper.h
new file mode 100644
index 0000000..54c2a52
--- /dev/null
+++ b/src/loader/loader_dri3_helper.h
@@ -0,0 +1,232 @@
+/*
+ * 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.
+ */
+
+#ifndef LOADER_DRI3_HEADER_H
+#define LOADER_DRI3_HEADER_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <xcb/xcb.h>
+#include <xcb/present.h>
+
+#include <GL/gl.h>
+#include <GL/internal/dri_interface.h>
+
+enum loader_dri3_buffer_type {
+ loader_dri3_buffer_back = 0,
+ loader_dri3_buffer_front = 1
+};
+
+struct loader_dri3_buffer {
+ __DRIimage *image;
+ __DRIimage *linear_buffer;
+ uint32_t pixmap;
+
+ /* Synchronization between the client and X server is done using an
+ * xshmfence that is mapped into an X server SyncFence. This lets the
+ * client check whether the X server is done using a buffer with a simple
+ * xshmfence call, rather than going to read X events from the wire.
+ *
+ * However, we can only wait for one xshmfence to be triggered at a time,
+ * so we need to know *which* buffer is going to be idle next. We do that
+ * by waiting for a PresentIdleNotify event. When that event arrives, the
+ * 'busy' flag gets cleared and the client knows that the fence has been
+ * triggered, and that the wait call will not block.
+ */
+
+ uint32_t sync_fence; /* XID of X SyncFence object */
+ struct xshmfence *shm_fence; /* pointer to xshmfence object */
+ bool busy; /* Set on swap, cleared on IdleNotify */
+ bool own_pixmap; /* We allocated the pixmap ID, free on destroy
*/
+
+ uint32_t size;
+ uint32_t pitch;
+ uint32_t cpp;
+ uint32_t flags;
+ uint32_t width, height;
+ uint64_t last_swap;
+
+ enum loader_dri3_buffer_type buffer_type;
+};
+
+
+#define LOADER_DRI3_MAX_BACK 4
+#define LOADER_DRI3_BACK_ID(i) (i)
+#define LOADER_DRI3_FRONT_ID (LOADER_DRI3_MAX_BACK)
+
+static inline int
+loader_dri3_pixmap_buf_id(enum loader_dri3_buffer_type buffer_type)
+{
+ if (buffer_type == loader_dri3_buffer_back)
+ return LOADER_DRI3_BACK_ID(0);
+ else
+ return LOADER_DRI3_FRONT_ID;
+}
+
+struct loader_dri3_extensions {
+ const __DRIcoreExtension *core;
+ const __DRIimageDriverExtension *image_driver;
+ const __DRI2flushExtension *flush;
+ const __DRI2configQueryExtension *config;
+ const __DRItexBufferExtension *tex_buffer;
+ const __DRIimageExtension *image;
+};
+
+struct loader_dri3_drawable;
+
+struct loader_dri3_vtable {
+ int (*get_swap_interval)(struct loader_dri3_drawable *);
+ int (*clamp_swap_interval)(struct loader_dri3_drawable *, int);
+ void (*set_swap_interval)(struct loader_dri3_drawable *, int);
+ void (*set_drawable_size)(struct loader_dri3_drawable *, int, int);
+ bool (*in_current_context)(struct loader_dri3_drawable *);
+ __DRIcontext *(*get_dri_context)(struct loader_dri3_drawable *);
+ void (*flush_drawable)(struct loader_dri3_drawable *, unsigned);
+ void (*show_fps)(struct loader_dri3_drawable *, uint64_t);
+};
+
+#define LOADER_DRI3_NUM_BUFFERS (1 + LOADER_DRI3_MAX_BACK)
+
+struct loader_dri3_drawable {
+ xcb_connection_t *conn;
+ __DRIdrawable *dri_drawable;
+ xcb_drawable_t drawable;
+ int width;
+ int height;
+ int depth;
+ uint8_t have_back;
+ uint8_t have_fake_front;
+ uint8_t is_pixmap;
+ uint8_t flipping;
+
+ /* Information about the GPU owning the buffer */
+ __DRIscreen *dri_screen;
+ bool is_different_gpu;
+
+ /* Present extension capabilities
+ */
+ uint32_t present_capabilities;
+
+ /* SBC numbers are tracked by using the serial numbers
+ * in the present request and complete events
+ */
+ uint64_t send_sbc;
+ uint64_t recv_sbc;
+
+ /* Last received UST/MSC values for pixmap present complete */
+ uint64_t ust, msc;
+
+ /* Last received UST/MSC values from present notify msc event */
+ uint64_t notify_ust, notify_msc;
+
+ /* Serial numbers for tracking wait_for_msc events */
+ uint32_t send_msc_serial;
+ uint32_t recv_msc_serial;
+
+ struct loader_dri3_buffer *buffers[LOADER_DRI3_NUM_BUFFERS];
+ int cur_back;
+ int num_back;
+
+ uint32_t *stamp;
+
+ xcb_present_event_t eid;
+ xcb_gcontext_t gc;
+ xcb_special_event_t *special_event;
+
+ bool first_init;
+
+ struct loader_dri3_extensions *ext;
+ struct loader_dri3_vtable *vtable;
+};
+
+void
+loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw,
+ int interval);
+
+void
+loader_dri3_drawable_fini(struct loader_dri3_drawable *draw);
+
+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*);
+
+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);
+
+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);
+
+int
+loader_dri3_wait_for_sbc(struct loader_dri3_drawable *draw,
+ int64_t target_sbc, int64_t *ust,
+ int64_t *msc, int64_t *sbc);
+
+int loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw);
+
+void
+loader_dri3_flush(struct loader_dri3_drawable *draw,
+ unsigned flags,
+ enum __DRI2throttleReason throttle_reason);
+
+void
+loader_dri3_copy_sub_buffer(struct loader_dri3_drawable *draw,
+ int x, int y,
+ int width, int height,
+ bool flush);
+
+void
+loader_dri3_copy_drawable(struct loader_dri3_drawable *draw,
+ xcb_drawable_t dest,
+ xcb_drawable_t src);
+
+void
+loader_dri3_wait_x(struct loader_dri3_drawable *draw);
+
+void
+loader_dri3_wait_gl(struct loader_dri3_drawable *draw);
+
+int loader_dri3_open(xcb_connection_t *conn,
+ xcb_window_t root,
+ uint32_t provider);
+
+int
+loader_dri3_get_buffers(__DRIdrawable *driDrawable,
+ unsigned int format,
+ uint32_t *stamp,
+ void *loaderPrivate,
+ uint32_t buffer_mask,
+ struct __DRIimageList *buffers);
+
+#endif
--
2.6.2
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