[PATCH weston v3] rpi: Add support for EGL buffers
Tomeu Vizoso
tomeu at tomeuvizoso.net
Mon Oct 7 11:02:20 CEST 2013
The EGL implementation on the RPi allocates a front and a back
DispmanX resources for each EGLSurface, which we composite along
the others.
---
v2: Added a stub for vc_dispmanx_get_handle_from_wl_buffer
v3: Release any wl_buffers when their surface is destroyed
src/rpi-bcm-stubs.h | 7 ++
src/rpi-renderer.c | 271 ++++++++++++++++++++++++++++++++++++++++++++++------
2 files changed, 250 insertions(+), 28 deletions(-)
diff --git a/src/rpi-bcm-stubs.h b/src/rpi-bcm-stubs.h
index d3ffd4b..703cd77 100644
--- a/src/rpi-bcm-stubs.h
+++ b/src/rpi-bcm-stubs.h
@@ -296,6 +296,13 @@ vc_dispmanx_snapshot(DISPMANX_DISPLAY_HANDLE_T display,
return -1;
}
+struct wl_resource;
+static inline DISPMANX_RESOURCE_HANDLE_T
+vc_dispmanx_get_handle_from_wl_buffer(struct wl_resource *_buffer)
+{
+ return DISPMANX_NO_HANDLE;
+}
+
/* from /opt/vc/include/EGL/eglplatform.h */
typedef struct {
diff --git a/src/rpi-renderer.c b/src/rpi-renderer.c
index 3ba5fc4..2660031 100644
--- a/src/rpi-renderer.c
+++ b/src/rpi-renderer.c
@@ -35,6 +35,12 @@
#include "compositor.h"
#include "rpi-renderer.h"
+#ifdef ENABLE_EGL
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include "weston-egl-ext.h"
+#endif
+
/*
* Dispmanx API offers alpha-blended overlays for hardware compositing.
* The final composite consists of dispmanx elements, and their contents:
@@ -84,6 +90,17 @@ struct rpi_resource {
struct rpir_output;
+struct rpir_egl_buffer {
+ struct weston_buffer_reference buffer_ref;
+ DISPMANX_RESOURCE_HANDLE_T resource_handle;
+};
+
+enum buffer_type {
+ BUFFER_TYPE_NULL,
+ BUFFER_TYPE_SHM,
+ BUFFER_TYPE_EGL
+};
+
struct rpir_surface {
struct weston_surface *surface;
@@ -102,7 +119,12 @@ struct rpir_surface {
struct rpi_resource *back;
pixman_region32_t prev_damage;
+ struct rpir_egl_buffer *egl_front;
+ struct rpir_egl_buffer *egl_back;
+ struct rpir_egl_buffer *egl_old_front;
+
struct weston_buffer_reference buffer_ref;
+ enum buffer_type buffer_type;
};
struct rpir_output {
@@ -125,6 +147,15 @@ struct rpi_renderer {
struct weston_renderer base;
int single_buffer;
+
+#ifdef ENABLE_EGL
+ EGLDisplay egl_display;
+
+ PFNEGLBINDWAYLANDDISPLAYWL bind_display;
+ PFNEGLUNBINDWAYLANDDISPLAYWL unbind_display;
+ PFNEGLQUERYWAYLANDBUFFERWL query_buffer;
+#endif
+ int has_bind_display;
};
static inline struct rpir_surface *
@@ -335,6 +366,7 @@ rpir_surface_create(struct rpi_renderer *renderer)
surface->back = &surface->resources[0];
else
surface->back = &surface->resources[1];
+ surface->buffer_type = BUFFER_TYPE_NULL;
pixman_region32_init(&surface->prev_damage);
@@ -354,6 +386,24 @@ rpir_surface_destroy(struct rpir_surface *surface)
rpi_resource_release(&surface->resources[1]);
DBG("rpir_surface %p destroyed (%u)\n", surface, surface->handle);
+ if (surface->egl_back != NULL) {
+ weston_buffer_reference(&surface->egl_back->buffer_ref, NULL);
+ free(surface->egl_back);
+ surface->egl_back = NULL;
+ }
+
+ if (surface->egl_front != NULL) {
+ weston_buffer_reference(&surface->egl_front->buffer_ref, NULL);
+ free(surface->egl_front);
+ surface->egl_front = NULL;
+ }
+
+ if (surface->egl_old_front != NULL) {
+ weston_buffer_reference(&surface->egl_old_front->buffer_ref, NULL);
+ free(surface->egl_old_front);
+ surface->egl_old_front = NULL;
+ }
+
free(surface);
}
@@ -472,8 +522,16 @@ rpir_surface_compute_rects(struct rpir_surface *surface,
src_x = 0 << 16;
src_y = 0 << 16;
- src_width = surface->front->width << 16;
- src_height = surface->front->height << 16;
+
+ if (surface->buffer_type == BUFFER_TYPE_EGL) {
+ struct weston_buffer *buffer = surface->egl_front->buffer_ref.buffer;
+
+ src_width = buffer->width << 16;
+ src_height = buffer->height << 16;
+ } else {
+ src_width = surface->front->width << 16;
+ src_height = surface->front->height << 16;
+ }
weston_matrix_multiply(&matrix, &output->matrix);
@@ -647,6 +705,10 @@ rpir_surface_compute_rects(struct rpir_surface *surface,
return -1;
}
+ /* EGL buffers will be upside-down related to what DispmanX expects */
+ if (surface->buffer_type == BUFFER_TYPE_EGL)
+ flipt ^= TRANSFORM_VFLIP;
+
vc_dispmanx_rect_set(src_rect, src_x, src_y, src_width, src_height);
vc_dispmanx_rect_set(dst_rect, dst_x, dst_y, dst_width, dst_height);
*flipmask = flipt;
@@ -681,6 +743,22 @@ vc_image2dispmanx_transform(VC_IMAGE_TRANSFORM_T t)
}
}
+
+static DISPMANX_RESOURCE_HANDLE_T
+rpir_surface_get_resource(struct rpir_surface *surface)
+{
+ switch (surface->buffer_type) {
+ case BUFFER_TYPE_SHM:
+ case BUFFER_TYPE_NULL:
+ return surface->front->handle;
+ case BUFFER_TYPE_EGL:
+ if (surface->egl_front != NULL)
+ return surface->egl_front->resource_handle;
+ default:
+ return DISPMANX_NO_HANDLE;
+ }
+}
+
static int
rpir_surface_dmx_add(struct rpir_surface *surface, struct rpir_output *output,
DISPMANX_UPDATE_HANDLE_T update, int layer)
@@ -700,6 +778,13 @@ rpir_surface_dmx_add(struct rpir_surface *surface, struct rpir_output *output,
VC_RECT_T src_rect;
VC_IMAGE_TRANSFORM_T flipmask;
int ret;
+ DISPMANX_RESOURCE_HANDLE_T resource_handle;
+
+ resource_handle = rpir_surface_get_resource(surface);
+ if (resource_handle == DISPMANX_NO_HANDLE) {
+ weston_log("%s: no buffer yet, aborting\n", __func__);
+ return 0;
+ }
ret = rpir_surface_compute_rects(surface, &src_rect, &dst_rect,
&flipmask);
@@ -711,17 +796,14 @@ rpir_surface_dmx_add(struct rpir_surface *surface, struct rpir_output *output,
output->display,
layer,
&dst_rect,
- surface->front->handle,
+ resource_handle,
&src_rect,
DISPMANX_PROTECTION_NONE,
&alphasetup,
NULL /* clamp */,
vc_image2dispmanx_transform(flipmask));
- DBG("rpir_surface %p add %u, alpha %f\n", surface, surface->handle,
- surface->surface->alpha);
-
- if (surface->handle == DISPMANX_NO_HANDLE)
- return -1;
+ DBG("rpir_surface %p add %u, alpha %f resource %d\n", surface,
+ surface->handle, surface->surface->alpha, resource_handle);
return 1;
}
@@ -758,6 +840,20 @@ rpir_surface_dmx_move(struct rpir_surface *surface,
/* XXX: return early, if all attributes stay the same */
+ if (surface->buffer_type == BUFFER_TYPE_EGL) {
+ DISPMANX_RESOURCE_HANDLE_T resource_handle;
+
+ resource_handle = rpir_surface_get_resource(surface);
+ if (resource_handle == DISPMANX_NO_HANDLE) {
+ weston_log("%s: no buffer yet, aborting\n", __func__);
+ return 0;
+ }
+
+ vc_dispmanx_element_change_source(update,
+ surface->handle,
+ resource_handle);
+ }
+
ret = rpir_surface_compute_rects(surface, &src_rect, &dst_rect,
&flipmask);
if (ret < 0)
@@ -835,8 +931,31 @@ rpir_surface_update(struct rpir_surface *surface, struct rpir_output *output,
int ret;
int obscured;
- if (need_swap)
- rpir_surface_swap_pointers(surface);
+ if (surface->buffer_type == BUFFER_TYPE_EGL) {
+ if (surface->egl_back != NULL) {
+ assert(surface->egl_old_front == NULL);
+ surface->egl_old_front = surface->egl_front;
+ surface->egl_front = surface->egl_back;
+ surface->egl_back = NULL;
+ }
+ if (surface->egl_front->buffer_ref.buffer == NULL) {
+ weston_log("warning: client unreffed current front buffer\n");
+
+ wl_list_remove(&surface->link);
+ if (surface->handle == DISPMANX_NO_HANDLE) {
+ wl_list_init(&surface->link);
+ } else {
+ rpir_surface_dmx_remove(surface, update);
+ wl_list_insert(&output->surface_cleanup_list,
+ &surface->link);
+ }
+
+ goto out;
+ }
+ } else {
+ if (need_swap)
+ rpir_surface_swap_pointers(surface);
+ }
obscured = is_surface_not_visible(surface->surface);
if (obscured) {
@@ -1133,40 +1252,72 @@ static void
rpi_renderer_attach(struct weston_surface *base, struct weston_buffer *buffer)
{
/* Called every time a client commits an attach. */
- static int warned;
struct rpir_surface *surface = to_rpir_surface(base);
assert(surface);
if (!surface)
return;
- if (buffer && !wl_shm_buffer_get(buffer->resource) && !warned) {
- weston_log("Error: non-wl_shm buffers not supported.\n");
- warned = 1;
- return;
+ if (surface->buffer_type == BUFFER_TYPE_SHM) {
+ if (!surface->single_buffer)
+ /* XXX: need to check if in middle of update */
+ rpi_resource_release(surface->back);
+
+ if (surface->handle == DISPMANX_NO_HANDLE)
+ /* XXX: cannot do this, if middle of an update */
+ rpi_resource_release(surface->front);
+
+ weston_buffer_reference(&surface->buffer_ref, NULL);
}
+ /* If buffer is NULL, Weston core unmaps the surface, the surface
+ * will not appear in repaint list, and so rpi_renderer_repaint_output
+ * will remove the DispmanX element. Later, for SHM, also the front
+ * buffer will be released in the cleanup_list processing.
+ */
+ if (!buffer)
+ return;
+
if (wl_shm_buffer_get(buffer->resource)) {
+ surface->buffer_type = BUFFER_TYPE_SHM;
buffer->shm_buffer = wl_shm_buffer_get(buffer->resource);
buffer->width = wl_shm_buffer_get_width(buffer->shm_buffer);
buffer->height = wl_shm_buffer_get_height(buffer->shm_buffer);
- }
- weston_buffer_reference(&surface->buffer_ref, buffer);
+ weston_buffer_reference(&surface->buffer_ref, buffer);
+ } else {
+#if ENABLE_EGL
+ struct rpi_renderer *renderer = to_rpi_renderer(base->compositor);
+ struct wl_resource *wl_resource =
+ (struct wl_resource *)buffer->resource;
+
+ if (!renderer->has_bind_display ||
+ !renderer->query_buffer(renderer->egl_display,
+ wl_resource,
+ EGL_WIDTH, &buffer->width)) {
+ weston_log("unhandled buffer type!\n");
+ weston_buffer_reference(&surface->buffer_ref, NULL);
+ surface->buffer_type = BUFFER_TYPE_NULL;
+ }
+
+ renderer->query_buffer(renderer->egl_display,
+ wl_resource,
+ EGL_HEIGHT, &buffer->height);
- /* XXX: need to check if in middle of update
- if (!buffer && !surface->single_buffer)
- rpi_resource_release(surface->back); */
+ surface->buffer_type = BUFFER_TYPE_EGL;
- /* XXX: cannot do this, if middle of an update
- if (surface->handle == DISPMANX_NO_HANDLE)
- rpi_resource_release(surface->front); */
+ if(surface->egl_back == NULL)
+ surface->egl_back = calloc(1, sizeof *surface->egl_back);
- /* If buffer is NULL, Weston core unmaps the surface, the surface
- * will not appear in repaint list, and so rpi_renderer_repaint_output
- * will remove the DispmanX element. Later, also the front buffer
- * will be released in the cleanup_list processing.
- */
+ weston_buffer_reference(&surface->egl_back->buffer_ref, buffer);
+ surface->egl_back->resource_handle =
+ vc_dispmanx_get_handle_from_wl_buffer(wl_resource);
+#else
+ weston_log("unhandled buffer type!\n");
+ weston_buffer_reference(&surface->buffer_ref, NULL);
+ surface->buffer_type = BUFFER_TYPE_NULL;
+#endif
+ }
}
static int
@@ -1256,6 +1407,12 @@ rpi_renderer_destroy(struct weston_compositor *compositor)
{
struct rpi_renderer *renderer = to_rpi_renderer(compositor);
+#if ENABLE_EGL
+ if (renderer->has_bind_display)
+ renderer->unbind_display(renderer->egl_display,
+ compositor->wl_display);
+#endif
+
free(renderer);
compositor->renderer = NULL;
}
@@ -1265,6 +1422,11 @@ rpi_renderer_create(struct weston_compositor *compositor,
const struct rpi_renderer_parameters *params)
{
struct rpi_renderer *renderer;
+#if ENABLE_EGL
+ const char *extensions;
+ EGLBoolean ret;
+ EGLint major, minor;
+#endif
weston_log("Initializing the DispmanX compositing renderer\n");
@@ -1283,6 +1445,43 @@ rpi_renderer_create(struct weston_compositor *compositor,
renderer->base.destroy_surface = rpi_renderer_destroy_surface;
renderer->base.destroy = rpi_renderer_destroy;
+#ifdef ENABLE_EGL
+ renderer->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ if (renderer->egl_display == EGL_NO_DISPLAY) {
+ weston_log("failed to create EGL display\n");
+ return -1;
+ }
+
+ if (!eglInitialize(renderer->egl_display, &major, &minor)) {
+ weston_log("failed to initialize EGL display\n");
+ return -1;
+ }
+
+ renderer->bind_display =
+ (void *) eglGetProcAddress("eglBindWaylandDisplayWL");
+ renderer->unbind_display =
+ (void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
+ renderer->query_buffer =
+ (void *) eglGetProcAddress("eglQueryWaylandBufferWL");
+
+ extensions = (const char *) eglQueryString(renderer->egl_display,
+ EGL_EXTENSIONS);
+ if (!extensions) {
+ weston_log("Retrieving EGL extension string failed.\n");
+ return -1;
+ }
+
+ if (strstr(extensions, "EGL_WL_bind_wayland_display"))
+ renderer->has_bind_display = 1;
+
+ if (renderer->has_bind_display) {
+ ret = renderer->bind_display(renderer->egl_display,
+ compositor->wl_display);
+ if (!ret)
+ renderer->has_bind_display = 0;
+ }
+#endif
+
compositor->renderer = &renderer->base;
compositor->read_format = PIXMAN_a8r8g8b8;
/* WESTON_CAP_ROTATION_ANY not supported */
@@ -1354,6 +1553,8 @@ WL_EXPORT void
rpi_renderer_finish_frame(struct weston_output *base)
{
struct rpir_output *output = to_rpir_output(base);
+ struct weston_compositor *compositor = base->compositor;
+ struct weston_surface *ws;
struct rpir_surface *surface;
while (!wl_list_empty(&output->surface_cleanup_list)) {
@@ -1376,5 +1577,19 @@ rpi_renderer_finish_frame(struct weston_output *base)
}
}
+ wl_list_for_each(ws, &compositor->surface_list, link) {
+ surface = to_rpir_surface(ws);
+
+ if (surface->buffer_type != BUFFER_TYPE_EGL)
+ continue;
+
+ if(surface->egl_old_front == NULL)
+ continue;
+
+ weston_buffer_reference(&surface->egl_old_front->buffer_ref, NULL);
+ free(surface->egl_old_front);
+ surface->egl_old_front = NULL;
+ }
+
wl_signal_emit(&base->frame_signal, base);
}
--
1.8.3.1
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