spice: rework mirror allocation, add no-resize fast path
Add fast path to qemu_spice_display_switch in case old and new displaysurface have identical size (happens with display panning and page flipping). We just swap the backing store then and don't go through the whole process of deleting and creating the primary surface. To simplify the code a bit move mirror surface allocation to qemu_spice_display_switch(). Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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@ -207,12 +207,6 @@ static void qemu_spice_create_update(SimpleSpiceDisplay *ssd)
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return;
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return;
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};
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};
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if (ssd->surface == NULL) {
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ssd->surface = pixman_image_ref(ssd->ds->image);
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ssd->mirror = qemu_pixman_mirror_create(ssd->ds->format,
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ssd->ds->image);
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}
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for (blk = 0; blk < blocks; blk++) {
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for (blk = 0; blk < blocks; blk++) {
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dirty_top[blk] = -1;
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dirty_top[blk] = -1;
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}
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}
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@ -409,7 +403,29 @@ void qemu_spice_display_switch(SimpleSpiceDisplay *ssd,
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SimpleSpiceUpdate *update;
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SimpleSpiceUpdate *update;
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bool need_destroy;
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bool need_destroy;
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dprint(1, "%s/%d:\n", __func__, ssd->qxl.id);
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if (surface && ssd->surface &&
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surface_width(surface) == pixman_image_get_width(ssd->surface) &&
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surface_height(surface) == pixman_image_get_height(ssd->surface)) {
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/* no-resize fast path: just swap backing store */
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dprint(1, "%s/%d: fast (%dx%d)\n", __func__, ssd->qxl.id,
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surface_width(surface), surface_height(surface));
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qemu_mutex_lock(&ssd->lock);
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ssd->ds = surface;
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pixman_image_unref(ssd->surface);
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ssd->surface = pixman_image_ref(ssd->ds->image);
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qemu_mutex_unlock(&ssd->lock);
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qemu_spice_display_update(ssd, 0, 0,
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surface_width(surface),
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surface_height(surface));
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return;
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}
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/* full mode switch */
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dprint(1, "%s/%d: full (%dx%d -> %dx%d)\n", __func__, ssd->qxl.id,
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ssd->surface ? pixman_image_get_width(ssd->surface) : 0,
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ssd->surface ? pixman_image_get_height(ssd->surface) : 0,
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surface ? surface_width(surface) : 0,
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surface ? surface_height(surface) : 0);
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memset(&ssd->dirty, 0, sizeof(ssd->dirty));
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memset(&ssd->dirty, 0, sizeof(ssd->dirty));
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if (ssd->surface) {
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if (ssd->surface) {
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@ -422,6 +438,9 @@ void qemu_spice_display_switch(SimpleSpiceDisplay *ssd,
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qemu_mutex_lock(&ssd->lock);
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qemu_mutex_lock(&ssd->lock);
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need_destroy = (ssd->ds != NULL);
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need_destroy = (ssd->ds != NULL);
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ssd->ds = surface;
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ssd->ds = surface;
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ssd->surface = pixman_image_ref(ssd->ds->image);
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ssd->mirror = qemu_pixman_mirror_create(ssd->ds->format,
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ssd->ds->image);
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while ((update = QTAILQ_FIRST(&ssd->updates)) != NULL) {
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while ((update = QTAILQ_FIRST(&ssd->updates)) != NULL) {
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QTAILQ_REMOVE(&ssd->updates, update, next);
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QTAILQ_REMOVE(&ssd->updates, update, next);
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qemu_spice_destroy_update(ssd, update);
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qemu_spice_destroy_update(ssd, update);
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