[Mesa-dev] [PATCH 1/3] vl/dri3: use external texture as back buffers
Nayan Deshmukh
nayan26deshmukh at gmail.com
Mon Oct 24 13:55:15 UTC 2016
Suggested-by: Leo Liu <leo.liu at amd.com>
Signed-off-by: Nayan Deshmukh <nayan26deshmukh at gmail.com>
---
src/gallium/auxiliary/vl/vl_winsys.h | 4 ++
src/gallium/auxiliary/vl/vl_winsys_dri3.c | 89 +++++++++++++++++++++++++++----
2 files changed, 83 insertions(+), 10 deletions(-)
diff --git a/src/gallium/auxiliary/vl/vl_winsys.h b/src/gallium/auxiliary/vl/vl_winsys.h
index 26db9f2..7c56b48 100644
--- a/src/gallium/auxiliary/vl/vl_winsys.h
+++ b/src/gallium/auxiliary/vl/vl_winsys.h
@@ -59,6 +59,10 @@ struct vl_screen
void *
(*get_private)(struct vl_screen *vscreen);
+ void
+ (*set_output_texture)(struct vl_screen *vscreen, struct pipe_resource *buffer,
+ uint32_t width, uint32_t height);
+
struct pipe_screen *pscreen;
struct pipe_loader_device *dev;
};
diff --git a/src/gallium/auxiliary/vl/vl_winsys_dri3.c b/src/gallium/auxiliary/vl/vl_winsys_dri3.c
index 2929928..44d6f4c 100644
--- a/src/gallium/auxiliary/vl/vl_winsys_dri3.c
+++ b/src/gallium/auxiliary/vl/vl_winsys_dri3.c
@@ -56,6 +56,7 @@ struct vl_dri3_buffer
struct xshmfence *shm_fence;
bool busy;
+ bool is_external_texture;
uint32_t width, height, pitch;
};
@@ -71,6 +72,9 @@ struct vl_dri3_screen
xcb_special_event_t *special_event;
struct pipe_context *pipe;
+ struct pipe_resource *output_texture;
+ uint32_t output_texture_width;
+ uint32_t output_texture_height;
struct vl_dri3_buffer *back_buffers[BACK_BUFFER_NUM];
int cur_back;
@@ -105,7 +109,8 @@ dri3_free_back_buffer(struct vl_dri3_screen *scrn,
xcb_free_pixmap(scrn->conn, buffer->pixmap);
xcb_sync_destroy_fence(scrn->conn, buffer->sync_fence);
xshmfence_unmap_shm(buffer->shm_fence);
- pipe_resource_reference(&buffer->texture, NULL);
+ if (!buffer->is_external_texture)
+ pipe_resource_reference(&buffer->texture, NULL);
if (buffer->linear_texture)
pipe_resource_reference(&buffer->linear_texture, NULL);
FREE(buffer);
@@ -236,13 +241,24 @@ dri3_alloc_back_buffer(struct vl_dri3_screen *scrn)
templ.format = PIPE_FORMAT_B8G8R8X8_UNORM;
templ.target = PIPE_TEXTURE_2D;
templ.last_level = 0;
- templ.width0 = scrn->width;
- templ.height0 = scrn->height;
+ if (scrn->output_texture) {
+ templ.width0 = (scrn->output_texture_width) ?
+ scrn->output_texture_width :
+ scrn->output_texture->width0;
+ templ.height0 = (scrn->output_texture_height) ?
+ scrn->output_texture_height :
+ scrn->output_texture->height0;
+ } else {
+ templ.width0 = scrn->width;
+ templ.height0 = scrn->height;
+ }
templ.depth0 = 1;
templ.array_size = 1;
if (scrn->is_different_gpu) {
- buffer->texture = scrn->base.pscreen->resource_create(scrn->base.pscreen,
+ buffer->texture = (scrn->output_texture) ?
+ scrn->output_texture :
+ scrn->base.pscreen->resource_create(scrn->base.pscreen,
&templ);
if (!buffer->texture)
goto unmap_shm;
@@ -257,7 +273,9 @@ dri3_alloc_back_buffer(struct vl_dri3_screen *scrn)
goto no_linear_texture;
} else {
templ.bind |= PIPE_BIND_SCANOUT | PIPE_BIND_SHARED;
- buffer->texture = scrn->base.pscreen->resource_create(scrn->base.pscreen,
+ buffer->texture = (scrn->output_texture) ?
+ scrn->output_texture :
+ scrn->base.pscreen->resource_create(scrn->base.pscreen,
&templ);
if (!buffer->texture)
goto unmap_shm;
@@ -271,11 +289,20 @@ dri3_alloc_back_buffer(struct vl_dri3_screen *scrn)
usage);
buffer_fd = whandle.handle;
buffer->pitch = whandle.stride;
+ buffer->width = templ.width0;
+ buffer->height = templ.height0;
+ buffer->is_external_texture = (scrn->output_texture) ?
+ true :
+ false;
+ scrn->output_texture = NULL;
+ scrn->output_texture_width = 0;
+ scrn->output_texture_height = 0;
+
xcb_dri3_pixmap_from_buffer(scrn->conn,
(pixmap = xcb_generate_id(scrn->conn)),
scrn->drawable,
0,
- scrn->width, scrn->height, buffer->pitch,
+ buffer->width, buffer->height, buffer->pitch,
scrn->depth, 32,
buffer_fd);
xcb_dri3_fence_from_fd(scrn->conn,
@@ -287,8 +314,6 @@ dri3_alloc_back_buffer(struct vl_dri3_screen *scrn)
buffer->pixmap = pixmap;
buffer->sync_fence = sync_fence;
buffer->shm_fence = shm_fence;
- buffer->width = scrn->width;
- buffer->height = scrn->height;
xshmfence_trigger(buffer->shm_fence);
@@ -310,6 +335,7 @@ dri3_get_back_buffer(struct vl_dri3_screen *scrn)
{
struct vl_dri3_buffer *buffer;
struct pipe_resource *texture = NULL;
+ bool allocate_new_buffer = false;
assert(scrn);
@@ -318,8 +344,30 @@ dri3_get_back_buffer(struct vl_dri3_screen *scrn)
return NULL;
buffer = scrn->back_buffers[scrn->cur_back];
- if (!buffer || buffer->width != scrn->width ||
- buffer->height != scrn->height) {
+ /* This is normal case when our buffer is smaller
+ * than the screen this will be same for external
+ * texture
+ */
+ if (!buffer || buffer->width < scrn->width ||
+ buffer->height < scrn->height)
+ allocate_new_buffer = true;
+
+ /* If we were using a external texture buffer and
+ * the texture is not provided then we need a new
+ * buffer
+ */
+ if (buffer && buffer->is_external_texture &&
+ !scrn->output_texture)
+ allocate_new_buffer = true;
+
+ /* In case of a single gpu we need to get the
+ * handle and pixmap for the texture that is set
+ */
+ if (buffer && buffer->is_external_texture &&
+ !scrn->is_different_gpu)
+ allocate_new_buffer = true;
+
+ if (allocate_new_buffer) {
struct vl_dri3_buffer *new_buffer;
new_buffer = dri3_alloc_back_buffer(scrn);
@@ -332,6 +380,13 @@ dri3_get_back_buffer(struct vl_dri3_screen *scrn)
vl_compositor_reset_dirty_area(&scrn->dirty_areas[scrn->cur_back]);
buffer = new_buffer;
scrn->back_buffers[scrn->cur_back] = buffer;
+ } else if (buffer->is_external_texture) {
+ /* In case of different gpu we can reuse the linear
+ * texture so we only need to set the external
+ * texture for copying
+ */
+ buffer->texture = scrn->output_texture;
+ scrn->output_texture = NULL;
}
pipe_resource_reference(&texture, buffer->texture);
@@ -627,6 +682,19 @@ vl_dri3_screen_get_private(struct vl_screen *vscreen)
}
static void
+vl_dri3_screen_set_output_texture(struct vl_screen *vscreen, struct pipe_resource *buffer,
+ uint32_t width, uint32_t height)
+{
+ struct vl_dri3_screen *scrn = (struct vl_dri3_screen *)vscreen;
+
+ assert(scrn);
+
+ scrn->output_texture = buffer;
+ scrn->output_texture_width = width;
+ scrn->output_texture_height = height;
+}
+
+static void
vl_dri3_screen_destroy(struct vl_screen *vscreen)
{
struct vl_dri3_screen *scrn = (struct vl_dri3_screen *)vscreen;
@@ -744,6 +812,7 @@ vl_dri3_screen_create(Display *display, int screen)
scrn->base.set_next_timestamp = vl_dri3_screen_set_next_timestamp;
scrn->base.get_private = vl_dri3_screen_get_private;
scrn->base.pscreen->flush_frontbuffer = vl_dri3_flush_frontbuffer;
+ scrn->base.set_output_texture = vl_dri3_screen_set_output_texture;
return &scrn->base;
--
2.7.4
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