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window: add toysurface abstraction and port EGL path

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We need more structure to the way we handle the backing storage in
toytoolkit, to make it possible to double-buffer the shm case properly.
The existing buffer handling is very complex with the three
different cases:
- EGLSurface backed Cairo surface with a window associated
- wl_shm backed Cairo surface with a window associated
- wl_shm backed Cairo surface without a window, as used by dnd.c

Introduce the toysurface abstraction, which defines the interface for
the both buffer handling cases that have a window associated. It also
means, that windows will not have a valid Cairo surface outside of their
repaint cycle.

Convert the EGLsurface case into toysurface for starters. For EGL-based
Cairo surfaces, the private data is no longer needed. Destroying
egl_window_surface will trigger the destruction of the cairo_surface_t,
not vice versa. This is possible because display_create_surface() is
shm-only.

The shm cases are left untouched.

As a side-effect, display_acquire_window_surface() and
display_release_window_surface() will no longer use the 'display'
argument. Instead, display will be the one inherited from the window.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
Pekka Paalanen 12 years ago committed by Kristian Høgsberg
parent b88b68fa42
commit 03fc316000
1 changed files with 184 additions and 121 deletions
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  1. 289
      clients/window.c

289
clients/window.c
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@ -142,6 +142,44 @@ struct window_output {
struct wl_list link;
};
struct toysurface {
/*
* Prepare the surface for drawing. Makes sure there is a surface
* of the right size available for rendering, and returns it.
* dx,dy are the x,y of wl_surface.attach.
* width,height are the new surface size.
* Returns the Cairo surface to draw to.
*/
cairo_surface_t *(*prepare)(struct toysurface *base, int dx, int dy,
int width, int height);
/*
* Post the surface to the server, returning the server allocation
* rectangle. The Cairo surface from prepare() must be destroyed
* after calling this.
*/
void (*swap)(struct toysurface *base,
struct rectangle *server_allocation);
/*
* Make the toysurface current with the given EGL context.
* Returns 0 on success, and negative of failure.
*/
int (*acquire)(struct toysurface *base, EGLContext ctx);
/*
* Release the toysurface from the EGL context, returning control
* to Cairo.
*/
void (*release)(struct toysurface *base);
/*
* Destroy the toysurface, including the Cairo surface, any
* backing storage, and the Wayland protocol objects.
*/
void (*destroy)(struct toysurface *base);
};
struct window {
struct display *display;
struct window *parent;
@ -166,6 +204,7 @@ struct window {
enum window_buffer_type buffer_type;
struct toysurface *toysurface;
cairo_surface_t *cairo_surface;
struct shm_pool *pool;
@ -347,68 +386,142 @@ enum window_location {
};
static const cairo_user_data_key_t shm_surface_data_key;
static const cairo_user_data_key_t egl_window_surface_data_key;
#ifdef HAVE_CAIRO_EGL
struct egl_window_surface_data {
struct egl_window_surface {
struct toysurface base;
cairo_surface_t *cairo_surface;
struct display *display;
struct wl_surface *surface;
struct wl_egl_window *window;
EGLSurface surf;
struct wl_egl_window *egl_window;
EGLSurface egl_surface;
};
static struct egl_window_surface *
to_egl_window_surface(struct toysurface *base)
{
return container_of(base, struct egl_window_surface, base);
}
static cairo_surface_t *
egl_window_surface_prepare(struct toysurface *base, int dx, int dy,
int width, int height)
{
struct egl_window_surface *surface = to_egl_window_surface(base);
wl_egl_window_resize(surface->egl_window, width, height, dx, dy);
cairo_gl_surface_set_size(surface->cairo_surface, width, height);
return cairo_surface_reference(surface->cairo_surface);
}
static void
egl_window_surface_data_destroy(void *p)
egl_window_surface_swap(struct toysurface *base,
struct rectangle *server_allocation)
{
struct egl_window_surface_data *data = p;
struct display *d = data->display;
struct egl_window_surface *surface = to_egl_window_surface(base);
eglDestroySurface(d->dpy, data->surf);
wl_egl_window_destroy(data->window);
data->surface = NULL;
cairo_gl_surface_swapbuffers(surface->cairo_surface);
wl_egl_window_get_attached_size(surface->egl_window,
&server_allocation->width,
&server_allocation->height);
}
free(p);
static int
egl_window_surface_acquire(struct toysurface *base, EGLContext ctx)
{
struct egl_window_surface *surface = to_egl_window_surface(base);
cairo_device_t *device;
device = cairo_surface_get_device(surface->cairo_surface);
if (!device)
return -1;
if (!ctx) {
if (device == surface->display->argb_device)
ctx = surface->display->argb_ctx;
else
assert(0);
}
cairo_device_flush(device);
cairo_device_acquire(device);
if (!eglMakeCurrent(surface->display->dpy, surface->egl_surface,
surface->egl_surface, ctx))
fprintf(stderr, "failed to make surface current\n");
return 0;
}
static cairo_surface_t *
display_create_egl_window_surface(struct display *display,
struct wl_surface *surface,
static void
egl_window_surface_release(struct toysurface *base)
{
struct egl_window_surface *surface = to_egl_window_surface(base);
cairo_device_t *device;
device = cairo_surface_get_device(surface->cairo_surface);
if (!device)
return;
if (!eglMakeCurrent(surface->display->dpy, NULL, NULL,
surface->display->argb_ctx))
fprintf(stderr, "failed to make context current\n");
cairo_device_release(device);
}
static void
egl_window_surface_destroy(struct toysurface *base)
{
struct egl_window_surface *surface = to_egl_window_surface(base);
struct display *d = surface->display;
cairo_surface_destroy(surface->cairo_surface);
eglDestroySurface(d->dpy, surface->egl_surface);
wl_egl_window_destroy(surface->egl_window);
surface->surface = NULL;
free(surface);
}
static struct toysurface *
egl_window_surface_create(struct display *display,
struct wl_surface *wl_surface,
uint32_t flags,
struct rectangle *rectangle)
{
cairo_surface_t *cairo_surface;
struct egl_window_surface_data *data;
EGLConfig config;
cairo_device_t *device;
struct egl_window_surface *surface;
data = malloc(sizeof *data);
if (data == NULL)
surface = calloc(1, sizeof *surface);
if (!surface)
return NULL;
data->display = display;
data->surface = surface;
surface->base.prepare = egl_window_surface_prepare;
surface->base.swap = egl_window_surface_swap;
surface->base.acquire = egl_window_surface_acquire;
surface->base.release = egl_window_surface_release;
surface->base.destroy = egl_window_surface_destroy;
config = display->argb_config;
device = display->argb_device;
surface->display = display;
surface->surface = wl_surface;
data->window = wl_egl_window_create(surface,
surface->egl_window = wl_egl_window_create(surface->surface,
rectangle->width,
rectangle->height);
data->surf = eglCreateWindowSurface(display->dpy, config,
data->window, NULL);
surface->egl_surface = eglCreateWindowSurface(display->dpy,
display->argb_config,
surface->egl_window,
NULL);
cairo_surface = cairo_gl_surface_create_for_egl(device,
data->surf,
surface->cairo_surface =
cairo_gl_surface_create_for_egl(display->argb_device,
surface->egl_surface,
rectangle->width,
rectangle->height);
cairo_surface_set_user_data(cairo_surface,
&egl_window_surface_data_key,
data, egl_window_surface_data_destroy);
return cairo_surface;
return &surface->base;
}
#endif
@ -812,9 +925,6 @@ window_attach_surface(struct window *window)
{
struct display *display = window->display;
struct wl_buffer *buffer;
#ifdef HAVE_CAIRO_EGL
struct egl_window_surface_data *data;
#endif
int32_t x, y;
if (window->type == TYPE_NONE) {
@ -840,13 +950,8 @@ window_attach_surface(struct window *window)
switch (window->buffer_type) {
#ifdef HAVE_CAIRO_EGL
case WINDOW_BUFFER_TYPE_EGL_WINDOW:
data = cairo_surface_get_user_data(window->cairo_surface,
&egl_window_surface_data_key);
cairo_gl_surface_swapbuffers(window->cairo_surface);
wl_egl_window_get_attached_size(data->window,
&window->server_allocation.width,
&window->server_allocation.height);
window->toysurface->swap(window->toysurface,
&window->server_allocation);
break;
#endif
case WINDOW_BUFFER_TYPE_SHM:
@ -876,8 +981,12 @@ window_has_focus(struct window *window)
static void
window_flush(struct window *window)
{
if (window->cairo_surface)
if (!window->cairo_surface)
return;
window_attach_surface(window);
cairo_surface_destroy(window->cairo_surface);
window->cairo_surface = NULL;
}
static void
@ -891,28 +1000,6 @@ window_set_surface(struct window *window, cairo_surface_t *surface)
window->cairo_surface = surface;
}
#ifdef HAVE_CAIRO_EGL
static void
window_resize_cairo_window_surface(struct window *window)
{
struct egl_window_surface_data *data;
int x, y;
data = cairo_surface_get_user_data(window->cairo_surface,
&egl_window_surface_data_key);
window_get_resize_dx_dy(window, &x, &y),
wl_egl_window_resize(data->window,
window->allocation.width,
window->allocation.height,
x,y);
cairo_gl_surface_set_size(window->cairo_surface,
window->allocation.width,
window->allocation.height);
}
#endif
struct display *
window_get_display(struct window *window)
{
@ -931,14 +1018,21 @@ window_create_surface(struct window *window)
switch (window->buffer_type) {
#ifdef HAVE_CAIRO_EGL
case WINDOW_BUFFER_TYPE_EGL_WINDOW:
if (window->cairo_surface) {
window_resize_cairo_window_surface(window);
return;
}
if (window->display->dpy) {
surface = display_create_egl_window_surface(
window->display, window->surface,
flags, &window->allocation);
if (!window->toysurface && window->display->dpy)
window->toysurface =
egl_window_surface_create(window->display,
window->surface,
flags,
&window->allocation);
if (window->toysurface) {
int dx, dy;
window_get_resize_dx_dy(window, &dx, &dy);
surface = window->toysurface->prepare(window->toysurface,
dx, dy,
window->allocation.width,
window->allocation.height);
break;
}
/* fall through */
@ -1001,6 +1095,9 @@ window_destroy(struct window *window)
if (window->cairo_surface != NULL)
cairo_surface_destroy(window->cairo_surface);
if (window->toysurface)
window->toysurface->destroy(window->toysurface);
if (window->frame_cb)
wl_callback_destroy(window->frame_cb);
free(window->title);
@ -3874,8 +3971,6 @@ display_create(int argc, char *argv[])
{
struct display *d;
assert(&egl_window_surface_data_key != &shm_surface_data_key);
d = malloc(sizeof *d);
if (d == NULL)
return NULL;
@ -4053,52 +4148,20 @@ display_acquire_window_surface(struct display *display,
struct window *window,
EGLContext ctx)
{
#ifdef HAVE_CAIRO_EGL
struct egl_window_surface_data *data;
cairo_device_t *device;
if (!window->cairo_surface)
if (window->buffer_type != WINDOW_BUFFER_TYPE_EGL_WINDOW)
return -1;
device = cairo_surface_get_device(window->cairo_surface);
if (!device)
return -1;
if (!ctx) {
if (device == display->argb_device)
ctx = display->argb_ctx;
else
assert(0);
}
data = cairo_surface_get_user_data(window->cairo_surface,
&egl_window_surface_data_key);
cairo_device_flush(device);
cairo_device_acquire(device);
if (!eglMakeCurrent(display->dpy, data->surf, data->surf, ctx))
fprintf(stderr, "failed to make surface current\n");
return 0;
#else
return -1;
#endif
return window->toysurface->acquire(window->toysurface, ctx);
}
void
display_release_window_surface(struct display *display,
struct window *window)
{
#ifdef HAVE_CAIRO_EGL
cairo_device_t *device;
device = cairo_surface_get_device(window->cairo_surface);
if (!device)
if (window->buffer_type != WINDOW_BUFFER_TYPE_EGL_WINDOW)
return;
if (!eglMakeCurrent(display->dpy, NULL, NULL, display->argb_ctx))
fprintf(stderr, "failed to make context current\n");
cairo_device_release(device);
#endif
window->toysurface->release(window->toysurface);
}
void

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