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Enable viewing all X11 cursor sizes

This commit is contained in:
Přemysl Eric Janouch 2021-11-27 02:49:26 +01:00
parent 085f2d7eef
commit c39ac1a9da
Signed by: p
GPG Key ID: A0420B94F92B9493
3 changed files with 94 additions and 46 deletions
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68
fastiv-io.c
View File

@ -955,39 +955,58 @@ open_xcursor(const gchar *data, gsize len, GError **error)
return NULL;
}
// Let's just arrange the pixel data in a recording surface.
static cairo_user_data_key_t key = {};
cairo_surface_t *recording =
cairo_recording_surface_create(CAIRO_CONTENT_COLOR_ALPHA, NULL);
cairo_surface_set_user_data(
recording, &key, images, (cairo_destroy_func_t) XcursorImagesDestroy);
cairo_t *cr = cairo_create(recording);
// Interpret cursors as animated pages.
cairo_surface_t *pages = NULL, *frames_head = NULL, *frames_tail = NULL;
// Unpack horizontally by animation, vertically by size.
// XXX: Assuming that all "nominal sizes" have the same dimensions.
XcursorDim last_nominal = -1;
int x = 0, y = 0, row_height = 0;
for (int i = 0; i < images->nimage; i++) {
XcursorImage *image = images->images[i];
if (image->size != last_nominal) {
x = 0;
y += row_height;
row_height = 0;
last_nominal = image->size;
}
// The library automatically byte swaps in _XcursorReadImage().
cairo_surface_t *source = cairo_image_surface_create_for_data(
cairo_surface_t *surface = cairo_image_surface_create_for_data(
(unsigned char *) image->pixels, CAIRO_FORMAT_ARGB32,
image->width, image->height, image->width * sizeof *image->pixels);
cairo_set_source_surface(cr, source, x, y);
cairo_surface_destroy(source);
cairo_paint(cr);
cairo_surface_set_user_data(surface, &fastiv_io_key_frame_duration,
(void *) (intptr_t) image->delay, NULL);
x += image->width;
row_height = MAX(row_height, (int) image->height);
if (pages && image->size == last_nominal) {
cairo_surface_set_user_data(surface,
&fastiv_io_key_frame_previous, frames_tail, NULL);
cairo_surface_set_user_data(frames_tail,
&fastiv_io_key_frame_next, surface,
(cairo_destroy_func_t) cairo_surface_destroy);
} else if (frames_head) {
cairo_surface_set_user_data(frames_head,
&fastiv_io_key_frame_previous, frames_tail, NULL);
cairo_surface_set_user_data(frames_head,
&fastiv_io_key_page_next, surface,
(cairo_destroy_func_t) cairo_surface_destroy);
cairo_surface_set_user_data(surface,
&fastiv_io_key_page_previous, frames_head, NULL);
frames_head = surface;
} else {
pages = frames_head = surface;
}
cairo_destroy(cr);
return recording;
frames_tail = surface;
last_nominal = image->size;
}
if (!pages) {
XcursorImagesDestroy(images);
return NULL;
}
// Wrap around animations in the last page.
cairo_surface_set_user_data(
frames_head, &fastiv_io_key_frame_previous, frames_tail, NULL);
// There is no need to copy data, assign it to the surface.
static cairo_user_data_key_t key = {};
cairo_surface_set_user_data(
pages, &key, images, (cairo_destroy_func_t) XcursorImagesDestroy);
return pages;
}
#endif // HAVE_XCURSOR --------------------------------------------------------
@ -1041,6 +1060,9 @@ cairo_user_data_key_t fastiv_io_key_frame_previous;
cairo_user_data_key_t fastiv_io_key_frame_duration;
cairo_user_data_key_t fastiv_io_key_loops;
cairo_user_data_key_t fastiv_io_key_page_next;
cairo_user_data_key_t fastiv_io_key_page_previous;
cairo_surface_t *
fastiv_io_open(const gchar *path, GError **error)
{

7
fastiv-io.h
View File

@ -46,6 +46,13 @@ extern cairo_user_data_key_t fastiv_io_key_frame_duration;
/// How many times to repeat the animation, or zero for +inf, as a uintptr_t.
extern cairo_user_data_key_t fastiv_io_key_loops;
/// The first frame of the next page, as a surface, in a chain.
/// There is no wrap-around.
extern cairo_user_data_key_t fastiv_io_key_page_next;
/// The first frame of the previous page, as a surface, in a chain.
/// There is no wrap-around. This is a weak pointer.
extern cairo_user_data_key_t fastiv_io_key_page_previous;
cairo_surface_t *fastiv_io_open(const gchar *path, GError **error);
cairo_surface_t *fastiv_io_open_from_data(
const char *data, size_t len, const gchar *path, GError **error);

65
fastiv-view.c
View File

@ -31,8 +31,9 @@
struct _FastivView {
GtkWidget parent_instance;
cairo_surface_t *surface; ///< The loaded image (sequence)
cairo_surface_t *frame; ///< Current frame within, unreferenced
cairo_surface_t *image; ///< The loaded image (sequence)
cairo_surface_t *page; ///< Current page within image, weak
cairo_surface_t *frame; ///< Current frame within page, weak
FastivIoOrientation orientation; ///< Current orientation
bool filter;
bool scale_to_fit;
@ -89,7 +90,7 @@ static void
fastiv_view_finalize(GObject *gobject)
{
FastivView *self = FASTIV_VIEW(gobject);
cairo_surface_destroy(self->surface);
cairo_surface_destroy(self->image);
G_OBJECT_CLASS(fastiv_view_parent_class)->finalize(gobject);
}
@ -115,28 +116,28 @@ static void
get_surface_dimensions(FastivView *self, double *width, double *height)
{
*width = *height = 0;
if (!self->surface)
if (!self->image)
return;
cairo_rectangle_t extents = {};
switch (cairo_surface_get_type(self->surface)) {
switch (cairo_surface_get_type(self->page)) {
case CAIRO_SURFACE_TYPE_IMAGE:
switch (self->orientation) {
case FastivIoOrientation90:
case FastivIoOrientationMirror90:
case FastivIoOrientation270:
case FastivIoOrientationMirror270:
*width = cairo_image_surface_get_height(self->surface);
*height = cairo_image_surface_get_width(self->surface);
*width = cairo_image_surface_get_height(self->page);
*height = cairo_image_surface_get_width(self->page);
break;
default:
*width = cairo_image_surface_get_width(self->surface);
*height = cairo_image_surface_get_height(self->surface);
*width = cairo_image_surface_get_width(self->page);
*height = cairo_image_surface_get_height(self->page);
}
return;
case CAIRO_SURFACE_TYPE_RECORDING:
if (!cairo_recording_surface_get_extents(self->surface, &extents)) {
cairo_recording_surface_ink_extents(self->surface,
if (!cairo_recording_surface_get_extents(self->page, &extents)) {
cairo_recording_surface_ink_extents(self->page,
&extents.x, &extents.y, &extents.width, &extents.height);
}
@ -198,7 +199,7 @@ fastiv_view_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
->size_allocate(widget, allocation);
FastivView *self = FASTIV_VIEW(widget);
if (!self->surface || !self->scale_to_fit)
if (!self->image || !self->scale_to_fit)
return;
double w, h;
@ -271,7 +272,7 @@ fastiv_view_draw(GtkWidget *widget, cairo_t *cr)
allocation.width, allocation.height);
FastivView *self = FASTIV_VIEW(widget);
if (!self->surface ||
if (!self->image ||
!gtk_cairo_should_draw_window(cr, gtk_widget_get_window(widget)))
return TRUE;
@ -408,7 +409,7 @@ static gboolean
fastiv_view_scroll_event(GtkWidget *widget, GdkEventScroll *event)
{
FastivView *self = FASTIV_VIEW(widget);
if (!self->surface)
if (!self->image)
return FALSE;
if (event->state & gtk_accelerator_get_default_mod_mask())
return FALSE;
@ -431,7 +432,7 @@ fastiv_view_key_press_event(GtkWidget *widget, GdkEventKey *event)
FastivView *self = FASTIV_VIEW(widget);
if (event->state & ~GDK_SHIFT_MASK & gtk_accelerator_get_default_mod_mask())
return FALSE;
if (!self->surface)
if (!self->image)
return FALSE;
switch (event->keyval) {
@ -462,16 +463,33 @@ fastiv_view_key_press_event(GtkWidget *widget, GdkEventKey *event)
gtk_widget_queue_resize(widget);
return TRUE;
case GDK_KEY_bracketleft:
case GDK_KEY_bracketleft: {
cairo_surface_t *page = cairo_surface_get_user_data(
self->page, &fastiv_io_key_page_previous);
if (page)
self->frame = self->page = page;
gtk_widget_queue_resize(widget);
return TRUE;
}
case GDK_KEY_bracketright: {
cairo_surface_t *page = cairo_surface_get_user_data(
self->page, &fastiv_io_key_page_next);
if (page)
self->frame = self->page = page;
gtk_widget_queue_resize(widget);
return TRUE;
}
case GDK_KEY_braceleft:
if (!(self->frame = cairo_surface_get_user_data(
self->frame, &fastiv_io_key_frame_previous)))
self->frame = self->surface;
self->frame = self->page;
gtk_widget_queue_draw(widget);
return TRUE;
case GDK_KEY_bracketright:
case GDK_KEY_braceright:
if (!(self->frame = cairo_surface_get_user_data(
self->frame, &fastiv_io_key_frame_next)))
self->frame = self->surface;
self->frame = self->page;
gtk_widget_queue_draw(widget);
return TRUE;
}
@ -527,14 +545,15 @@ fastiv_view_open(FastivView *self, const gchar *path, GError **error)
cairo_surface_t *surface = fastiv_io_open(path, error);
if (!surface)
return FALSE;
if (self->surface)
cairo_surface_destroy(self->surface);
if (self->image)
cairo_surface_destroy(self->image);
self->frame = self->surface = surface;
self->frame = self->page = self->image = surface;
set_scale_to_fit(self, true);
// TODO(p): This is actually per-page.
if ((self->orientation = (uintptr_t) cairo_surface_get_user_data(
self->surface, &fastiv_io_key_orientation)) ==
self->image, &fastiv_io_key_orientation)) ==
FastivIoOrientationUnknown)
self->orientation = FastivIoOrientation0;
return TRUE;