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Fix #5643, #5064: rounding issues in floating-point -> integer conversions

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Currently, various floating-point expressions involving
the coordinates of borders, titlebars and content surfaces
are directly assigned to integers, and so they are rounded
towards zero.

This results in off-by-one distances between these elements
when the signs of their coordinates differ.

Fixed by wrapping these expressions with a call to
floor before the assignment.
This commit is contained in:
Dimitris Triantafyllidis 2021-02-22 13:32:07 +02:00 committed by Tudor Brindus
parent 1a6471be17
commit aac1582ea9
2 changed files with 19 additions and 19 deletions
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4
sway/desktop/output.c
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@ -105,8 +105,8 @@ static bool get_surface_box(struct surface_iterator_data *data,
data->rotation);
struct wlr_box box = {
.x = data->ox + _sx,
.y = data->oy + _sy,
.x = floor(data->ox + _sx),
.y = floor(data->oy + _sy),
.width = sw,
.height = sh,
};

34
sway/desktop/render.c
View file

@ -346,8 +346,8 @@ static void render_view(struct sway_output *output, pixman_region32_t *damage,
if (state->border_left) {
memcpy(&color, colors->child_border, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = state->x;
box.y = state->content_y;
box.x = floor(state->x);
box.y = floor(state->content_y);
box.width = state->border_thickness;
box.height = state->content_height;
scale_box(&box, output_scale);
@ -365,8 +365,8 @@ static void render_view(struct sway_output *output, pixman_region32_t *damage,
memcpy(&color, colors->child_border, sizeof(float) * 4);
}
premultiply_alpha(color, con->alpha);
box.x = state->content_x + state->content_width;
box.y = state->content_y;
box.x = floor(state->content_x + state->content_width);
box.y = floor(state->content_y);
box.width = state->border_thickness;
box.height = state->content_height;
scale_box(&box, output_scale);
@ -380,8 +380,8 @@ static void render_view(struct sway_output *output, pixman_region32_t *damage,
memcpy(&color, colors->child_border, sizeof(float) * 4);
}
premultiply_alpha(color, con->alpha);
box.x = state->x;
box.y = state->content_y + state->content_height;
box.x = floor(state->x);
box.y = floor(state->content_y + state->content_height);
box.width = state->width;
box.height = state->border_thickness;
scale_box(&box, output_scale);
@ -662,8 +662,8 @@ static void render_top_border(struct sway_output *output,
// Child border - top edge
memcpy(&color, colors->child_border, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = state->x;
box.y = state->y;
box.x = floor(state->x);
box.y = floor(state->y);
box.width = state->width;
box.height = state->border_thickness;
scale_box(&box, output_scale);
@ -718,8 +718,8 @@ static void render_containers_linear(struct sway_output *output,
}
if (state->border == B_NORMAL) {
render_titlebar(output, damage, child, state->x,
state->y, state->width, colors,
render_titlebar(output, damage, child, floor(state->x),
floor(state->y), state->width, colors,
title_texture, marks_texture);
} else if (state->border == B_PIXEL) {
render_top_border(output, damage, child, colors);
@ -773,7 +773,7 @@ static void render_containers_tabbed(struct sway_output *output,
marks_texture = child->marks_unfocused;
}
int x = cstate->x + tab_width * i;
int x = floor(cstate->x + tab_width * i);
// Make last tab use the remaining width of the parent
if (i == parent->children->length - 1) {
@ -886,8 +886,8 @@ static void render_container(struct sway_output *output,
struct parent_data data = {
.layout = con->current.layout,
.box = {
.x = con->current.x,
.y = con->current.y,
.x = floor(con->current.x),
.y = floor(con->current.y),
.width = con->current.width,
.height = con->current.height,
},
@ -903,8 +903,8 @@ static void render_workspace(struct sway_output *output,
struct parent_data data = {
.layout = ws->current.layout,
.box = {
.x = ws->current.x,
.y = ws->current.y,
.x = floor(ws->current.x),
.y = floor(ws->current.y),
.width = ws->current.width,
.height = ws->current.height,
},
@ -938,8 +938,8 @@ static void render_floating_container(struct sway_output *soutput,
}
if (con->current.border == B_NORMAL) {
render_titlebar(soutput, damage, con, con->current.x,
con->current.y, con->current.width, colors,
render_titlebar(soutput, damage, con, floor(con->current.x),
floor(con->current.y), con->current.width, colors,
title_texture, marks_texture);
} else if (con->current.border == B_PIXEL) {
render_top_border(soutput, damage, con, colors);