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Add back wlr_buffer

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This reverts commit d27eeaa14c.
This commit is contained in:
emersion 2018-06-14 08:51:38 +01:00
parent d27eeaa14c
commit 3a2ef75d3a
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GPG key ID: 0FDE7BE0E88F5E48
5 changed files with 290 additions and 102 deletions
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56
include/wlr/types/wlr_buffer.h Normal file
View file

@ -0,0 +1,56 @@
#ifndef WLR_TYPES_WLR_BUFFER_H
#define WLR_TYPES_WLR_BUFFER_H
#include <pixman.h>
#include <wayland-server.h>
/**
* A client buffer.
*/
struct wlr_buffer {
struct wl_resource *resource; // can be NULL
struct wlr_texture *texture; // can be NULL
bool released;
size_t n_refs;
struct wl_listener resource_destroy;
};
struct wlr_renderer;
/**
* Check if a resource is a wl_buffer resource.
*/
bool wlr_resource_is_buffer(struct wl_resource *resource);
/**
* Get the size of a wl_buffer resource.
*/
bool wlr_buffer_get_resource_size(struct wl_resource *resource,
struct wlr_renderer *renderer, int *width, int *height);
/**
* Upload a buffer to the GPU and reference it.
*/
struct wlr_buffer *wlr_buffer_create(struct wlr_renderer *renderer,
struct wl_resource *resource);
/**
* Reference the buffer.
*/
struct wlr_buffer *wlr_buffer_ref(struct wlr_buffer *buffer);
/**
* Unreference the buffer. After this call, `buffer` may not be accessed
* anymore.
*/
void wlr_buffer_unref(struct wlr_buffer *buffer);
/**
* Try to update the buffer's content. On success, returns the updated buffer
* and destroys the provided `buffer`. On error, `buffer` is intact and NULL is
* returned.
*
* Fails if there's more than one reference to the buffer or if the texture
* isn't mutable.
*/
struct wlr_buffer *wlr_buffer_apply_damage(struct wlr_buffer *buffer,
struct wl_resource *resource, pixman_region32_t *damage);
#endif

1
include/wlr/types/wlr_surface.h
View file

@ -69,6 +69,7 @@ struct wlr_subsurface {
struct wlr_surface {
struct wl_resource *resource;
struct wlr_renderer *renderer;
struct wlr_buffer *buffer;
struct wlr_texture *texture;
struct wlr_surface_state *current, *pending;
const char *role; // the lifetime-bound role or null

1
types/meson.build
View file

@ -20,6 +20,7 @@ lib_wlr_types = static_library(
'xdg_shell_v6/wlr_xdg_surface_v6.c',
'xdg_shell_v6/wlr_xdg_toplevel_v6.c',
'wlr_box.c',
'wlr_buffer.c',
'wlr_compositor.c',
'wlr_cursor.c',
'wlr_gamma_control.c',

187
types/wlr_buffer.c Normal file
View file

@ -0,0 +1,187 @@
#include <assert.h>
#include <stdlib.h>
#include <wlr/types/wlr_buffer.h>
#include <wlr/types/wlr_linux_dmabuf.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/util/log.h>
bool wlr_resource_is_buffer(struct wl_resource *resource) {
return strcmp(wl_resource_get_class(resource), wl_buffer_interface.name) == 0;
}
bool wlr_buffer_get_resource_size(struct wl_resource *resource,
struct wlr_renderer *renderer, int *width, int *height) {
assert(wlr_resource_is_buffer(resource));
struct wl_shm_buffer *shm_buf = wl_shm_buffer_get(resource);
if (shm_buf != NULL) {
*width = wl_shm_buffer_get_width(shm_buf);
*height = wl_shm_buffer_get_height(shm_buf);
} else if (wlr_renderer_resource_is_wl_drm_buffer(renderer,
resource)) {
wlr_renderer_wl_drm_buffer_get_size(renderer, resource,
width, height);
} else if (wlr_dmabuf_resource_is_buffer(resource)) {
struct wlr_dmabuf_buffer *dmabuf =
wlr_dmabuf_buffer_from_buffer_resource(resource);
*width = dmabuf->attributes.width;
*height = dmabuf->attributes.height;
} else {
*width = *height = 0;
return false;
}
return true;
}
static void buffer_resource_handle_destroy(struct wl_listener *listener,
void *data) {
struct wlr_buffer *buffer =
wl_container_of(listener, buffer, resource_destroy);
wl_list_remove(&buffer->resource_destroy.link);
wl_list_init(&buffer->resource_destroy.link);
buffer->resource = NULL;
if (!buffer->released) {
// The texture becomes invalid
wlr_texture_destroy(buffer->texture);
buffer->texture = NULL;
}
}
struct wlr_buffer *wlr_buffer_create(struct wlr_renderer *renderer,
struct wl_resource *resource) {
assert(wlr_resource_is_buffer(resource));
struct wlr_texture *texture = NULL;
bool released = false;
struct wl_shm_buffer *shm_buf = wl_shm_buffer_get(resource);
if (shm_buf != NULL) {
enum wl_shm_format fmt = wl_shm_buffer_get_format(shm_buf);
int32_t stride = wl_shm_buffer_get_stride(shm_buf);
int32_t width = wl_shm_buffer_get_width(shm_buf);
int32_t height = wl_shm_buffer_get_height(shm_buf);
wl_shm_buffer_begin_access(shm_buf);
void *data = wl_shm_buffer_get_data(shm_buf);
texture = wlr_texture_from_pixels(renderer, fmt, stride,
width, height, data);
wl_shm_buffer_end_access(shm_buf);
// We have uploaded the data, we don't need to access the wl_buffer
// anymore
wl_buffer_send_release(resource);
released = true;
} else if (wlr_renderer_resource_is_wl_drm_buffer(renderer, resource)) {
texture = wlr_texture_from_wl_drm(renderer, resource);
} else if (wlr_dmabuf_resource_is_buffer(resource)) {
struct wlr_dmabuf_buffer *dmabuf =
wlr_dmabuf_buffer_from_buffer_resource(resource);
texture = wlr_texture_from_dmabuf(renderer, &dmabuf->attributes);
} else {
wlr_log(L_ERROR, "Cannot upload texture: unknown buffer type");
return NULL;
}
if (texture == NULL) {
wlr_log(L_ERROR, "Failed to upload texture");
return NULL;
}
struct wlr_buffer *buffer = calloc(1, sizeof(struct wlr_buffer));
if (buffer == NULL) {
return NULL;
}
buffer->resource = resource;
buffer->texture = texture;
buffer->released = released;
buffer->n_refs = 1;
wl_resource_add_destroy_listener(resource, &buffer->resource_destroy);
buffer->resource_destroy.notify = buffer_resource_handle_destroy;
return buffer;
}
struct wlr_buffer *wlr_buffer_ref(struct wlr_buffer *buffer) {
buffer->n_refs++;
return buffer;
}
void wlr_buffer_unref(struct wlr_buffer *buffer) {
if (buffer == NULL) {
return;
}
assert(buffer->n_refs > 0);
buffer->n_refs--;
if (buffer->n_refs > 0) {
return;
}
if (!buffer->released && buffer->resource != NULL) {
wl_buffer_send_release(buffer->resource);
}
wl_list_remove(&buffer->resource_destroy.link);
wlr_texture_destroy(buffer->texture);
free(buffer);
}
struct wlr_buffer *wlr_buffer_apply_damage(struct wlr_buffer *buffer,
struct wl_resource *resource, pixman_region32_t *damage) {
assert(wlr_resource_is_buffer(resource));
if (buffer->n_refs > 1) {
// Someone else still has a reference to the buffer
return NULL;
}
struct wl_shm_buffer *shm_buf = wl_shm_buffer_get(resource);
if (shm_buf == NULL) {
// Uploading only damaged regions only works for wl_shm buffers
return NULL;
}
enum wl_shm_format fmt = wl_shm_buffer_get_format(shm_buf);
int32_t stride = wl_shm_buffer_get_stride(shm_buf);
int32_t width = wl_shm_buffer_get_width(shm_buf);
int32_t height = wl_shm_buffer_get_height(shm_buf);
int32_t texture_width, texture_height;
wlr_texture_get_size(buffer->texture, &texture_width, &texture_height);
if (width != texture_width || height != texture_height) {
return NULL;
}
wl_shm_buffer_begin_access(shm_buf);
void *data = wl_shm_buffer_get_data(shm_buf);
int n;
pixman_box32_t *rects = pixman_region32_rectangles(damage, &n);
for (int i = 0; i < n; ++i) {
pixman_box32_t *r = &rects[i];
if (!wlr_texture_write_pixels(buffer->texture, fmt, stride,
r->x2 - r->x1, r->y2 - r->y1, r->x1, r->y1,
r->x1, r->y1, data)) {
wl_shm_buffer_end_access(shm_buf);
return NULL;
}
}
wl_shm_buffer_end_access(shm_buf);
// We have uploaded the data, we don't need to access the wl_buffer
// anymore
wl_buffer_send_release(resource);
wl_list_remove(&buffer->resource_destroy.link);
wl_resource_add_destroy_listener(resource, &buffer->resource_destroy);
buffer->resource_destroy.notify = buffer_resource_handle_destroy;
buffer->resource = resource;
buffer->released = true;
return buffer;
}

147
types/wlr_surface.c
View file

@ -1,10 +1,9 @@
#include <assert.h>
#include <stdlib.h>
#include <wayland-server.h>
#include <wlr/render/egl.h>
#include <wlr/render/interface.h>
#include <wlr/types/wlr_buffer.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_linux_dmabuf.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_region.h>
#include <wlr/types/wlr_surface.h>
@ -46,13 +45,6 @@ static void surface_handle_buffer_destroy(struct wl_listener *listener,
surface_state_reset_buffer(state);
}
static void surface_state_release_buffer(struct wlr_surface_state *state) {
if (state->buffer) {
wl_buffer_send_release(state->buffer);
surface_state_reset_buffer(state);
}
}
static void surface_state_set_buffer(struct wlr_surface_state *state,
struct wl_resource *buffer) {
surface_state_reset_buffer(state);
@ -175,24 +167,8 @@ static bool surface_update_size(struct wlr_surface *surface,
int scale = state->scale;
enum wl_output_transform transform = state->transform;
struct wl_shm_buffer *buf = wl_shm_buffer_get(state->buffer);
if (buf != NULL) {
state->buffer_width = wl_shm_buffer_get_width(buf);
state->buffer_height = wl_shm_buffer_get_height(buf);
} else if (wlr_renderer_resource_is_wl_drm_buffer(surface->renderer,
state->buffer)) {
wlr_renderer_wl_drm_buffer_get_size(surface->renderer, state->buffer,
&state->buffer_width, &state->buffer_height);
} else if (wlr_dmabuf_resource_is_buffer(state->buffer)) {
struct wlr_dmabuf_buffer *dmabuf =
wlr_dmabuf_buffer_from_buffer_resource(state->buffer);
state->buffer_width = dmabuf->attributes.width;
state->buffer_height = dmabuf->attributes.height;
} else {
wlr_log(L_ERROR, "Unknown buffer handle attached");
state->buffer_width = 0;
state->buffer_height = 0;
}
wlr_buffer_get_resource_size(state->buffer, surface->renderer,
&state->buffer_width, &state->buffer_height);
int width = state->buffer_width / scale;
int height = state->buffer_height / scale;
@ -243,7 +219,6 @@ static void surface_move_state(struct wlr_surface *surface,
update_size = true;
}
if ((next->invalid & WLR_SURFACE_INVALID_BUFFER)) {
surface_state_release_buffer(state);
surface_state_set_buffer(state, next->buffer);
surface_state_reset_buffer(next);
state->sx = next->sx;
@ -351,91 +326,60 @@ static void surface_damage_subsurfaces(struct wlr_subsurface *subsurface) {
}
static void surface_apply_damage(struct wlr_surface *surface,
bool invalid_buffer, bool reupload_buffer) {
bool invalid_buffer) {
struct wl_resource *resource = surface->current->buffer;
if (resource == NULL) {
// NULL commit
wlr_buffer_unref(surface->buffer);
surface->buffer = NULL;
surface->texture = NULL;
return;
}
struct wl_shm_buffer *buf = wl_shm_buffer_get(resource);
if (buf != NULL) {
wl_shm_buffer_begin_access(buf);
enum wl_shm_format fmt = wl_shm_buffer_get_format(buf);
int32_t stride = wl_shm_buffer_get_stride(buf);
int32_t width = wl_shm_buffer_get_width(buf);
int32_t height = wl_shm_buffer_get_height(buf);
void *data = wl_shm_buffer_get_data(buf);
if (surface->texture == NULL || reupload_buffer) {
wlr_texture_destroy(surface->texture);
surface->texture = wlr_texture_from_pixels(surface->renderer, fmt,
stride, width, height, data);
} else {
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_copy(&damage, &surface->current->buffer_damage);
pixman_region32_intersect_rect(&damage, &damage, 0, 0,
surface->current->buffer_width,
surface->current->buffer_height);
int n;
pixman_box32_t *rects = pixman_region32_rectangles(&damage, &n);
for (int i = 0; i < n; ++i) {
pixman_box32_t *r = &rects[i];
if (!wlr_texture_write_pixels(surface->texture, fmt, stride,
r->x2 - r->x1, r->y2 - r->y1, r->x1, r->y1,
r->x1, r->y1, data)) {
break;
}
}
pixman_region32_fini(&damage);
}
wl_shm_buffer_end_access(buf);
// We've uploaded the wl_shm_buffer data to the GPU, we won't access the
// wl_buffer anymore
surface_state_release_buffer(surface->current);
} else if (invalid_buffer || reupload_buffer) {
wlr_texture_destroy(surface->texture);
if (wlr_renderer_resource_is_wl_drm_buffer(surface->renderer, resource)) {
surface->texture =
wlr_texture_from_wl_drm(surface->renderer, resource);
} else if (wlr_dmabuf_resource_is_buffer(resource)) {
struct wlr_dmabuf_buffer *dmabuf =
wlr_dmabuf_buffer_from_buffer_resource(resource);
surface->texture =
wlr_texture_from_dmabuf(surface->renderer, &dmabuf->attributes);
} else {
surface->texture = NULL;
wlr_log(L_ERROR, "Unknown buffer handle attached");
}
// Don't release the wl_buffer yet: since the texture is shared with the
// client, we'll access the wl_buffer when rendering
if (surface->buffer != NULL && !surface->buffer->released &&
!invalid_buffer) {
// The buffer is still the same, no need to re-upload
return;
}
if (surface->buffer != NULL && surface->buffer->released) {
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_copy(&damage, &surface->current->buffer_damage);
pixman_region32_intersect_rect(&damage, &damage, 0, 0,
surface->current->buffer_width, surface->current->buffer_height);
struct wlr_buffer *updated_buffer =
wlr_buffer_apply_damage(surface->buffer, resource, &damage);
pixman_region32_fini(&damage);
if (updated_buffer != NULL) {
surface->buffer = updated_buffer;
return;
}
}
wlr_buffer_unref(surface->buffer);
surface->buffer = NULL;
surface->texture = NULL;
struct wlr_buffer *buffer = wlr_buffer_create(surface->renderer, resource);
if (buffer == NULL) {
wlr_log(L_ERROR, "Failed to upload buffer");
return;
}
surface->buffer = buffer;
surface->texture = buffer->texture;
}
static void surface_commit_pending(struct wlr_surface *surface) {
int32_t oldw = surface->current->buffer_width;
int32_t oldh = surface->current->buffer_height;
bool invalid_buffer = surface->pending->invalid & WLR_SURFACE_INVALID_BUFFER;
bool null_buffer_commit = invalid_buffer && surface->pending->buffer == NULL;
surface_move_state(surface, surface->pending, surface->current);
if (null_buffer_commit) {
wlr_texture_destroy(surface->texture);
surface->texture = NULL;
}
bool reupload_buffer = oldw != surface->current->buffer_width ||
oldh != surface->current->buffer_height;
surface_apply_damage(surface, invalid_buffer, reupload_buffer);
surface_apply_damage(surface, invalid_buffer);
// commit subsurface order
struct wlr_subsurface *subsurface;
@ -657,10 +601,9 @@ static void surface_handle_resource_destroy(struct wl_resource *resource) {
wl_list_remove(wl_resource_get_link(surface->resource));
wl_list_remove(&surface->renderer_destroy.link);
wlr_texture_destroy(surface->texture);
surface_state_destroy(surface->pending);
surface_state_destroy(surface->current);
wlr_buffer_unref(surface->buffer);
free(surface);
}