static cairo_xcb_pixmap_t *
_pixmap_from_image (cairo_xcb_surface_t *target,
xcb_render_pictformat_t format,
cairo_image_surface_t *image,
cairo_xcb_shm_info_t *shm_info)
{
xcb_gcontext_t gc;
cairo_xcb_pixmap_t *pixmap;
pixmap = _cairo_xcb_pixmap_create (target,
image->width,
image->height);
if (unlikely (pixmap->base.status))
return pixmap;
gc = _cairo_xcb_screen_get_gc (target->screen, pixmap->pixmap, image->depth);
if (shm_info != NULL) {
shm_info->seqno =
_cairo_xcb_connection_shm_put_image (target->connection,
pixmap->pixmap, gc,
image->width, image->height,
0, 0,
image->width, image->height,
0, 0,
image->depth,
shm_info->shm,
shm_info->offset);
} else {
int len;
/* Do we need to trim the image? */
len = CAIRO_STRIDE_FOR_WIDTH_BPP (image->width,
PIXMAN_FORMAT_BPP (image->pixman_format));
if (len == image->stride) {
_cairo_xcb_connection_put_image (target->connection,
pixmap->pixmap, gc,
image->width, image->height,
0, 0,
image->depth,
image->stride,
image->data);
} else {
_cairo_xcb_connection_put_subimage (target->connection,
pixmap->pixmap, gc,
0, 0,
image->width, image->height,
PIXMAN_FORMAT_BPP (image->pixman_format) / 8,
image->stride,
0, 0,
image->depth,
image->data);
}
}
_cairo_xcb_screen_put_gc (target->screen, image->depth, gc);
return pixmap;
}
static cairo_status_t
_put_image_boxes (cairo_xcb_surface_t *surface,
cairo_image_surface_t *image,
cairo_boxes_t *boxes)
{
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
xcb_gcontext_t gc;
if (boxes->num_boxes == 0)
return CAIRO_STATUS_SUCCESS;
/* XXX track damaged region? */
status = _cairo_xcb_connection_acquire (surface->connection);
if (unlikely (status))
return status;
assert (image->pixman_format == surface->pixman_format);
assert (image->depth == surface->depth);
assert (image->stride == (int) CAIRO_STRIDE_FOR_WIDTH_BPP (image->width, PIXMAN_FORMAT_BPP (image->pixman_format)));
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
status = _put_shm_image_boxes (surface, image, gc, boxes);
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
struct _cairo_boxes_chunk *chunk;
for (chunk = &boxes->chunks; chunk; chunk = chunk->next) {
int i;
for (i = 0; i < chunk->count; i++) {
cairo_box_t *b = &chunk->base[i];
int x = _cairo_fixed_integer_part (b->p1.x);
int y = _cairo_fixed_integer_part (b->p1.y);
int width = _cairo_fixed_integer_part (b->p2.x - b->p1.x);
int height = _cairo_fixed_integer_part (b->p2.y - b->p1.y);
_cairo_xcb_connection_put_image (surface->connection,
surface->drawable, gc,
width, height,
x, y,
image->depth,
image->stride,
image->data +
x * PIXMAN_FORMAT_BPP (image->pixman_format) / 8 +
y * image->stride);
}
}
status = CAIRO_STATUS_SUCCESS;
}
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
_cairo_xcb_connection_release (surface->connection);
return status;
}
static cairo_int_status_t
_cairo_xcb_surface_create_shm_image (cairo_xcb_surface_t *target,
cairo_image_surface_t **image_out,
cairo_xcb_shm_info_t **shm_info_out)
{
cairo_image_surface_t *image;
cairo_xcb_shm_info_t *shm_info;
cairo_status_t status;
size_t size, stride;
if ((target->flags & CAIRO_XCB_HAS_SHM) == 0)
return CAIRO_INT_STATUS_UNSUPPORTED;
stride = CAIRO_STRIDE_FOR_WIDTH_BPP (target->width,
PIXMAN_FORMAT_BPP (target->pixman_format));
size = stride * target->height;
if (size < CAIRO_XCB_SHM_SMALL_IMAGE) {
target->flags &= ~CAIRO_XCB_HAS_SHM;
return CAIRO_INT_STATUS_UNSUPPORTED;
}
status = _cairo_xcb_connection_allocate_shm_info (target->screen->connection,
size, &shm_info);
if (unlikely (status))
return status;
image = (cairo_image_surface_t *)
_cairo_image_surface_create_with_pixman_format (shm_info->mem,
target->pixman_format,
target->width,
target->height,
stride);
status = image->base.status;
if (unlikely (status)) {
_cairo_xcb_shm_info_destroy (shm_info);
return status;
}
status = _cairo_user_data_array_set_data (&image->base.user_data,
(const cairo_user_data_key_t *) target->connection,
shm_info,
(cairo_destroy_func_t) _cairo_xcb_shm_info_destroy);
if (unlikely (status)) {
cairo_surface_destroy (&image->base);
_cairo_xcb_shm_info_destroy (shm_info);
return status;
}
*image_out = image;
*shm_info_out = shm_info;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_put_image (cairo_xcb_surface_t *surface,
cairo_image_surface_t *image)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
/* XXX track damaged region? */
status = _cairo_xcb_connection_acquire (surface->connection);
if (unlikely (status))
return status;
status = _cairo_xcb_connection_take_socket (surface->connection);
if (unlikely (status)) {
_cairo_xcb_connection_release (surface->connection);
return status;
}
if (image->pixman_format == surface->pixman_format) {
xcb_gcontext_t gc;
assert (image->width == surface->width);
assert (image->height == surface->height);
assert (image->depth == surface->depth);
assert (image->stride == (int) CAIRO_STRIDE_FOR_WIDTH_BPP (image->width, PIXMAN_FORMAT_BPP (image->pixman_format)));
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
status = _put_shm_image (surface, gc, image);
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
_cairo_xcb_connection_put_image (surface->connection,
surface->drawable, gc,
image->width, image->height,
0, 0,
image->depth,
image->stride,
image->data);
status = CAIRO_STATUS_SUCCESS;
}
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
} else {
ASSERT_NOT_REACHED;
}
_cairo_xcb_connection_release (surface->connection);
return status;
}
static cairo_surface_t *
_cairo_xcb_surface_create_shm_image (cairo_xcb_connection_t *connection,
pixman_format_code_t pixman_format,
int width, int height,
cairo_bool_t might_reuse,
cairo_xcb_shm_info_t **shm_info_out)
{
cairo_surface_t *image;
cairo_xcb_shm_info_t *shm_info;
cairo_int_status_t status;
size_t stride;
*shm_info_out = NULL;
stride = CAIRO_STRIDE_FOR_WIDTH_BPP (width,
PIXMAN_FORMAT_BPP (pixman_format));
status = _cairo_xcb_connection_allocate_shm_info (connection,
stride * height,
might_reuse,
&shm_info);
if (unlikely (status)) {
if (status == CAIRO_INT_STATUS_UNSUPPORTED)
return NULL;
return _cairo_surface_create_in_error (status);
}
image = _cairo_image_surface_create_with_pixman_format (shm_info->mem,
pixman_format,
width, height,
stride);
if (unlikely (image->status)) {
_cairo_xcb_shm_info_destroy (shm_info);
return image;
}
status = _cairo_user_data_array_set_data (&image->user_data,
(const cairo_user_data_key_t *) connection,
shm_info,
(cairo_destroy_func_t) _cairo_xcb_shm_info_destroy);
if (unlikely (status)) {
cairo_surface_destroy (image);
_cairo_xcb_shm_info_destroy (shm_info);
return _cairo_surface_create_in_error (status);
}
*shm_info_out = shm_info;
return image;
}
/**
* cairo_format_stride_for_width:
* @format: A #cairo_format_t value
* @width: The desired width of an image surface to be created.
*
* This function provides a stride value that will respect all
* alignment requirements of the accelerated image-rendering code
* within cairo. Typical usage will be of the form:
*
* <informalexample><programlisting>
* int stride;
* unsigned char *data;
* #cairo_surface_t *surface;
*
* stride = cairo_format_stride_for_width (format, width);
* data = malloc (stride * height);
* surface = cairo_image_surface_create_for_data (data, format,
* width, height,
* stride);
* </programlisting></informalexample>
*
* Return value: the appropriate stride to use given the desired
* format and width, or -1 if either the format is invalid or the width
* too large.
*
* Since: 1.6
**/
int
cairo_format_stride_for_width (cairo_format_t format,
int width)
{
int bpp;
if (! CAIRO_FORMAT_VALID (format)) {
_cairo_error_throw (CAIRO_STATUS_INVALID_FORMAT);
return -1;
}
bpp = _cairo_format_bits_per_pixel (format);
if ((unsigned) (width) >= (INT32_MAX - 7) / (unsigned) (bpp))
return -1;
return CAIRO_STRIDE_FOR_WIDTH_BPP (width, bpp);
}
static cairo_status_t
_cairo_xcb_surface_create_similar_shm (cairo_xcb_surface_t *other,
pixman_format_code_t pixman_format,
int width, int height,
cairo_surface_t **out)
{
size_t size, stride;
cairo_xcb_shm_info_t *shm_info;
cairo_status_t status;
cairo_surface_t *image;
stride = CAIRO_STRIDE_FOR_WIDTH_BPP (width, PIXMAN_FORMAT_BPP (pixman_format));
size = stride * height;
if (size < CAIRO_XCB_SHM_SMALL_IMAGE)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_xcb_connection_allocate_shm_info (other->connection,
size, &shm_info);
if (unlikely (status))
return status;
image = _cairo_image_surface_create_with_pixman_format (shm_info->mem,
pixman_format,
width, height,
stride);
status = image->status;
if (unlikely (status)) {
_cairo_xcb_shm_info_destroy (shm_info);
return status;
}
status = _cairo_user_data_array_set_data (&image->user_data,
(const cairo_user_data_key_t *) other->connection,
shm_info,
(cairo_destroy_func_t) _cairo_xcb_shm_info_destroy);
if (unlikely (status)) {
cairo_surface_destroy (image);
_cairo_xcb_shm_info_destroy (shm_info);
return status;
}
*out = image;
return CAIRO_STATUS_SUCCESS;
}
static cairo_surface_t *
_get_image (cairo_xcb_surface_t *surface,
cairo_bool_t use_shm,
int x, int y,
int width, int height)
{
cairo_surface_t *image;
cairo_xcb_connection_t *connection;
xcb_get_image_reply_t *reply;
cairo_int_status_t status;
assert (surface->fallback == NULL);
assert (x >= 0);
assert (y >= 0);
assert (x + width <= surface->width);
assert (y + height <= surface->height);
if (surface->deferred_clear) {
image =
_cairo_image_surface_create_with_pixman_format (NULL,
surface->pixman_format,
width, height,
0);
if (surface->deferred_clear_color.alpha_short > 0x00ff) {
cairo_solid_pattern_t solid;
_cairo_pattern_init_solid (&solid, &surface->deferred_clear_color);
status = _cairo_surface_paint (image,
CAIRO_OPERATOR_SOURCE,
&solid.base,
NULL);
if (unlikely (status)) {
cairo_surface_destroy (image);
image = _cairo_surface_create_in_error (status);
}
}
return image;
}
connection = surface->connection;
status = _cairo_xcb_connection_acquire (connection);
if (unlikely (status))
return _cairo_surface_create_in_error (status);
if (use_shm) {
image = _get_shm_image (surface, x, y, width, height);
if (image) {
if (image->status) {
_cairo_xcb_connection_release (connection);
return image;
}
cairo_surface_destroy (image);
}
}
status = _cairo_xcb_connection_get_image (connection,
surface->drawable,
x, y,
width, height,
&reply);
if (unlikely (status))
goto FAIL;
if (reply == NULL && ! surface->owns_pixmap) {
/* xcb_get_image_t from a window is dangerous because it can
* produce errors if the window is unmapped or partially
* outside the screen. We could check for errors and
* retry, but to keep things simple, we just create a
* temporary pixmap
*
* If we hit this fallback too often, we should remember so and
* skip the round-trip from the above GetImage request,
* similar to what cairo-xlib does.
*/
xcb_pixmap_t pixmap;
xcb_gcontext_t gc;
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
pixmap = _cairo_xcb_connection_create_pixmap (connection,
surface->depth,
surface->drawable,
width, height);
/* XXX IncludeInferiors? */
_cairo_xcb_connection_copy_area (connection,
surface->drawable,
pixmap, gc,
x, y,
0, 0,
width, height);
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
status = _cairo_xcb_connection_get_image (connection,
pixmap,
0, 0,
width, height,
&reply);
_cairo_xcb_connection_free_pixmap (connection, pixmap);
if (unlikely (status))
goto FAIL;
}
if (unlikely (reply == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL;
}
/* XXX byte swap */
/* XXX format conversion */
assert (reply->depth == surface->depth);
image = _cairo_image_surface_create_with_pixman_format
(xcb_get_image_data (reply),
surface->pixman_format,
width, height,
CAIRO_STRIDE_FOR_WIDTH_BPP (width,
PIXMAN_FORMAT_BPP (surface->pixman_format)));
status = image->status;
if (unlikely (status)) {
free (reply);
goto FAIL;
}
/* XXX */
pixman_image_set_destroy_function (((cairo_image_surface_t *)image)->pixman_image, _destroy_image, reply);
_cairo_xcb_connection_release (connection);
return image;
FAIL:
_cairo_xcb_connection_release (connection);
return _cairo_surface_create_in_error (status);
}
static cairo_status_t
_cairo_xcb_shm_image_create (cairo_xcb_connection_t *connection,
pixman_format_code_t pixman_format,
int width, int height,
cairo_image_surface_t **image_out,
cairo_xcb_shm_info_t **shm_info_out)
{
cairo_surface_t *image = NULL;
cairo_xcb_shm_info_t *shm_info = NULL;
cairo_status_t status;
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
if ((connection->flags & CAIRO_XCB_HAS_SHM)) {
size_t size, stride;
stride = CAIRO_STRIDE_FOR_WIDTH_BPP (width, PIXMAN_FORMAT_BPP (pixman_format));
size = stride * height;
if (size > CAIRO_XCB_SHM_SMALL_IMAGE) {
status = _cairo_xcb_connection_allocate_shm_info (connection,
size, &shm_info);
if (unlikely (status))
return status;
image = _cairo_image_surface_create_with_pixman_format (shm_info->mem,
pixman_format,
width, height,
stride);
status = image->status;
if (unlikely (status)) {
_cairo_xcb_shm_info_destroy (shm_info);
return status;
}
status = _cairo_user_data_array_set_data (&image->user_data,
(const cairo_user_data_key_t *) connection,
shm_info,
(cairo_destroy_func_t) _cairo_xcb_shm_info_destroy);
if (unlikely (status)) {
cairo_surface_destroy (image);
_cairo_xcb_shm_info_destroy (shm_info);
return status;
}
}
}
#endif
if (image == NULL) {
image = _cairo_image_surface_create_with_pixman_format (NULL,
pixman_format,
width, height,
0);
status = image->status;
if (unlikely (status))
return status;
}
*image_out = (cairo_image_surface_t *) image;
*shm_info_out = shm_info;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_get_image (cairo_xcb_surface_t *surface,
cairo_bool_t use_shm,
cairo_image_surface_t **image_out)
{
cairo_image_surface_t *image;
cairo_xcb_connection_t *connection;
xcb_get_image_reply_t *reply;
cairo_status_t status;
if (surface->base.is_clear || surface->deferred_clear) {
image = (cairo_image_surface_t *)
_cairo_image_surface_create_with_pixman_format (NULL,
surface->pixman_format,
surface->width,
surface->height,
0);
*image_out = image;
return image->base.status;
}
connection = surface->connection;
status = _cairo_xcb_connection_acquire (connection);
if (unlikely (status))
return status;
status = _cairo_xcb_connection_take_socket (connection);
if (unlikely (status))
goto FAIL;
if (use_shm) {
status = _get_shm_image (surface, image_out);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
goto FAIL;
}
if (surface->use_pixmap == 0) {
status = _cairo_xcb_connection_get_image (connection,
surface->drawable,
0, 0,
surface->width,
surface->height,
&reply);
if (unlikely (status))
goto FAIL;
} else {
surface->use_pixmap--;
reply = NULL;
}
if (reply == NULL && ! surface->owns_pixmap) {
/* xcb_get_image_t from a window is dangerous because it can
* produce errors if the window is unmapped or partially
* outside the screen. We could check for errors and
* retry, but to keep things simple, we just create a
* temporary pixmap
*/
xcb_pixmap_t pixmap;
xcb_gcontext_t gc;
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
pixmap = _cairo_xcb_connection_create_pixmap (connection,
surface->depth,
surface->drawable,
surface->width,
surface->height);
/* XXX IncludeInferiors? */
_cairo_xcb_connection_copy_area (connection,
surface->drawable,
pixmap, gc,
0, 0,
0, 0,
surface->width,
surface->height);
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
status = _cairo_xcb_connection_get_image (connection,
pixmap,
0, 0,
surface->width,
surface->height,
&reply);
_cairo_xcb_connection_free_pixmap (connection, pixmap);
if (unlikely (status))
goto FAIL;
}
if (unlikely (reply == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL;
}
/* XXX byte swap */
/* XXX format conversion */
assert (reply->depth == surface->depth);
image = (cairo_image_surface_t *)
_cairo_image_surface_create_with_pixman_format
(xcb_get_image_data (reply),
surface->pixman_format,
surface->width,
surface->height,
CAIRO_STRIDE_FOR_WIDTH_BPP (surface->width,
PIXMAN_FORMAT_BPP (surface->pixman_format)));
status = image->base.status;
if (unlikely (status)) {
free (reply);
goto FAIL;
}
assert (xcb_get_image_data_length (reply) == image->height * image->stride);
pixman_image_set_destroy_function (image->pixman_image, _destroy_image, reply);
_cairo_xcb_connection_release (connection);
/* synchronisation point */
surface->marked_dirty = FALSE;
*image_out = image;
return CAIRO_STATUS_SUCCESS;
FAIL:
_cairo_xcb_connection_release (connection);
return status;
}
