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viewporter: fix src buffer bounds check

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The surface scale and transform are applied before the viewport.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3766
This commit is contained in:
Simon Ser 2023-11-24 17:00:34 +01:00 committed by Kirill Primak
parent 7dcb045176
commit 4fbe648faf
1 changed files with 11 additions and 4 deletions
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15
types/wlr_viewporter.c
View file

@ -3,6 +3,7 @@
#include <wlr/types/wlr_compositor.h> #include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_viewporter.h> #include <wlr/types/wlr_viewporter.h>
#include <wlr/util/log.h> #include <wlr/util/log.h>
#include <wlr/util/transform.h>
#include "viewporter-protocol.h" #include "viewporter-protocol.h"
#define VIEWPORTER_VERSION 1 #define VIEWPORTER_VERSION 1
@ -131,6 +132,15 @@ static void viewport_handle_resource_destroy(struct wl_resource *resource) {
viewport_destroy(viewport); viewport_destroy(viewport);
} }
static bool check_src_buffer_bounds(const struct wlr_surface_state *state) {
int width = state->buffer_width / state->scale;
int height = state->buffer_height / state->scale;
wlr_output_transform_coords(state->transform, &width, &height);
struct wlr_fbox box = state->viewport.src;
return box.x + box.width <= width && box.y + box.height <= height;
}
static void viewport_handle_surface_client_commit(struct wl_listener *listener, static void viewport_handle_surface_client_commit(struct wl_listener *listener,
void *data) { void *data) {
struct wlr_viewport *viewport = struct wlr_viewport *viewport =
@ -148,10 +158,7 @@ static void viewport_handle_surface_client_commit(struct wl_listener *listener,
} }
if (state->viewport.has_src && state->buffer != NULL && if (state->viewport.has_src && state->buffer != NULL &&
(state->viewport.src.x + state->viewport.src.width > !check_src_buffer_bounds(state)) {
state->buffer_width ||
state->viewport.src.y + state->viewport.src.height >
state->buffer_height)) {
wl_resource_post_error(viewport->resource, WP_VIEWPORT_ERROR_OUT_OF_BUFFER, wl_resource_post_error(viewport->resource, WP_VIEWPORT_ERROR_OUT_OF_BUFFER,
"source rectangle out of buffer bounds"); "source rectangle out of buffer bounds");
return; return;