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surface: check buffer size is compatible with scale 

This relies on [1].

[1]: 8d5fadad47
This commit is contained in:
Simon Ser 2020-03-05 16:24:25 +01:00
parent 8d76d3263d
commit 91fa2ff395
1 changed files with 22 additions and 6 deletions
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28
types/wlr_surface.c
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@ -145,17 +145,22 @@ static void surface_set_input_region(struct wl_client *client,
* rectangle) but before applying the viewport scaling (via the viewport's
* destination rectangle).
*/
static void surface_state_viewport_src_size(struct wlr_surface_state *state,
static bool surface_state_viewport_src_size(struct wlr_surface_state *state,
int *out_width, int *out_height) {
if (state->buffer_width == 0 && state->buffer_height == 0) {
*out_width = *out_height = 0;
return;
return true;
}
if (state->viewport.has_src) {
*out_width = state->viewport.src.width;
*out_height = state->viewport.src.height;
} else {
if (state->buffer_width % state->scale != 0 ||
state->buffer_height % state->scale != 0) {
return false;
}
int width = state->buffer_width / state->scale;
int height = state->buffer_height / state->scale;
if ((state->transform & WL_OUTPUT_TRANSFORM_90) != 0) {
@ -166,9 +171,11 @@ static void surface_state_viewport_src_size(struct wlr_surface_state *state,
*out_width = width;
*out_height = height;
}
return true;
}
static void surface_state_finalize(struct wlr_surface *surface,
static bool surface_state_finalize(struct wlr_surface *surface,
struct wlr_surface_state *state) {
if ((state->committed & WLR_SURFACE_STATE_BUFFER)) {
if (state->buffer_resource != NULL) {
@ -187,8 +194,13 @@ static void surface_state_finalize(struct wlr_surface *surface,
state->height = state->viewport.dst_height;
}
} else {
surface_state_viewport_src_size(state,
&state->width, &state->height);
if (!surface_state_viewport_src_size(state,
&state->width, &state->height)) {
wl_resource_post_error(surface->resource,
WL_SURFACE_ERROR_INVALID_SIZE,
"Buffer size not divisible by scale");
return false;
}
}
pixman_region32_intersect_rect(&state->surface_damage,
@ -197,6 +209,8 @@ static void surface_state_finalize(struct wlr_surface *surface,
pixman_region32_intersect_rect(&state->buffer_damage,
&state->buffer_damage, 0, 0, state->buffer_width,
state->buffer_height);
return true;
}
static void surface_update_damage(pixman_region32_t *buffer_damage,
@ -388,7 +402,9 @@ static void surface_update_input_region(struct wlr_surface *surface) {
}
static void surface_commit_pending(struct wlr_surface *surface) {
surface_state_finalize(surface, &surface->pending);
if (!surface_state_finalize(surface, &surface->pending)) {
return;
}
if (surface->role && surface->role->precommit) {
surface->role->precommit(surface);