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-rw-r--r--sway/desktop/output.c12
-rw-r--r--sway/desktop/render.c165
2 files changed, 89 insertions, 88 deletions
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index adc1ee10..fc52dd28 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -223,11 +223,15 @@ void output_drag_icons_for_each_surface(struct sway_output *output,
}
}
+static int scale_length(int length, int offset, float scale) {
+ return round((offset + length) * scale) - round(offset * scale);
+}
+
static void scale_box(struct wlr_box *box, float scale) {
- box->x *= scale;
- box->y *= scale;
- box->width *= scale;
- box->height *= scale;
+ box->width = scale_length(box->width, box->x, scale);
+ box->height = scale_length(box->height, box->y, scale);
+ box->x = round(box->x * scale);
+ box->y = round(box->y * scale);
}
struct sway_workspace *output_get_active_workspace(struct sway_output *output) {
diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index 3617da87..9b26c560 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -33,11 +33,27 @@ struct render_data {
float alpha;
};
+/**
+ * Apply scale to a width or height.
+ *
+ * One does not simply multiply the width by the scale. We allow fractional
+ * scaling, which means the resulting scaled width might be a decimal.
+ * So we round it.
+ *
+ * But even this can produce undesirable results depending on the X or Y offset
+ * of the box. For example, with a scale of 1.5, a box with width=1 should not
+ * scale to 2px if its X coordinate is 1, because the X coordinate would have
+ * scaled to 2px.
+ */
+static int scale_length(int length, int offset, float scale) {
+ return round((offset + length) * scale) - round(offset * scale);
+}
+
static void scale_box(struct wlr_box *box, float scale) {
- box->x *= scale;
- box->y *= scale;
- box->width *= scale;
- box->height *= scale;
+ box->width = scale_length(box->width, box->x, scale);
+ box->height = scale_length(box->height, box->y, scale);
+ box->x = round(box->x * scale);
+ box->y = round(box->y * scale);
}
static void scissor_output(struct wlr_output *wlr_output,
@@ -392,14 +408,23 @@ static void render_titlebar(struct sway_output *output,
render_rect(output->wlr_output, output_damage, &box, color);
// Single pixel right edge
- box.x = (x + width - TITLEBAR_BORDER_THICKNESS) * output_scale;
+ box.x = x + width - TITLEBAR_BORDER_THICKNESS;
+ box.y = y + TITLEBAR_BORDER_THICKNESS;
+ box.width = TITLEBAR_BORDER_THICKNESS;
+ box.height =
+ container_titlebar_height() - TITLEBAR_BORDER_THICKNESS * 2;
+ scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
}
size_t inner_width = width - TITLEBAR_H_PADDING * 2;
+ int bg_y = y + TITLEBAR_BORDER_THICKNESS;
+ int ob_bg_height = scale_length(
+ (TITLEBAR_V_PADDING - TITLEBAR_BORDER_THICKNESS) * 2 +
+ config->font_height, bg_y, output_scale);
// Marks
- size_t marks_ob_width = 0; // output-buffer-local
+ int marks_ob_width = 0; // output-buffer-local
if (config->show_marks && marks_texture) {
struct wlr_box texture_box;
wlr_texture_get_size(marks_texture,
@@ -408,15 +433,14 @@ static void render_titlebar(struct sway_output *output,
// The marks texture might be shorter than the config->font_height, in
// which case we need to pad it as evenly as possible above and below.
- int ob_padding_total = config->font_height * output_scale -
- texture_box.height;
- int ob_padding_above = floor(ob_padding_total / 2);
- int ob_padding_below = ceil(ob_padding_total / 2);
+ int ob_padding_total = ob_bg_height - texture_box.height;
+ int ob_padding_above = floor(ob_padding_total / 2.0);
+ int ob_padding_below = ceil(ob_padding_total / 2.0);
// Render texture
- texture_box.x = (x - output_x + width - TITLEBAR_H_PADDING)
- * output_scale - texture_box.width;
- texture_box.y = (y - output_y + TITLEBAR_V_PADDING) * output_scale +
+ texture_box.x = round((x - output_x + width - TITLEBAR_H_PADDING)
+ * output_scale) - texture_box.width;
+ texture_box.y = round((bg_y - output_y) * output_scale) +
ob_padding_above;
float matrix[9];
@@ -431,29 +455,18 @@ static void render_titlebar(struct sway_output *output,
&texture_box, matrix, con->alpha);
// Padding above
- if (ob_padding_above > 0) {
- memcpy(&color, colors->background, sizeof(float) * 4);
- premultiply_alpha(color, con->alpha);
- box.x = (x + width - TITLEBAR_H_PADDING) * output_scale -
- texture_box.width;
- box.y = (y + TITLEBAR_V_PADDING) * output_scale;
- box.width = texture_box.width;
- box.height = ob_padding_above;
- render_rect(output->wlr_output, output_damage, &box, color);
- }
+ memcpy(&color, colors->background, sizeof(float) * 4);
+ premultiply_alpha(color, con->alpha);
+ box.x = texture_box.x + round(output_x * output_scale);
+ box.y = round((y + TITLEBAR_BORDER_THICKNESS) * output_scale);
+ box.width = texture_box.width;
+ box.height = ob_padding_above;
+ render_rect(output->wlr_output, output_damage, &box, color);
// Padding below
- if (ob_padding_below > 0) {
- memcpy(&color, colors->background, sizeof(float) * 4);
- premultiply_alpha(color, con->alpha);
- box.x = (x + width - TITLEBAR_H_PADDING) * output_scale -
- texture_box.width;
- box.y = (y + TITLEBAR_V_PADDING) * output_scale +
- ob_padding_above + texture_box.height;
- box.width = texture_box.width;
- box.height = ob_padding_below;
- render_rect(output->wlr_output, output_damage, &box, color);
- }
+ box.y += ob_padding_above + texture_box.height;
+ box.height = ob_padding_below;
+ render_rect(output->wlr_output, output_damage, &box, color);
}
// Title text
@@ -466,89 +479,73 @@ static void render_titlebar(struct sway_output *output,
// The title texture might be shorter than the config->font_height,
// in which case we need to pad it above and below.
- int ob_padding_above = (config->font_baseline - con->title_baseline)
- * output_scale;
- int ob_padding_below = (config->font_height - con->title_height)
- * output_scale - ob_padding_above;
+ int ob_padding_above = round((config->font_baseline -
+ con->title_baseline + TITLEBAR_V_PADDING -
+ TITLEBAR_BORDER_THICKNESS) * output_scale);
+ int ob_padding_below = ob_bg_height - ob_padding_above -
+ texture_box.height;
// Render texture
- texture_box.x = (x - output_x + TITLEBAR_H_PADDING) * output_scale;
- texture_box.y = (y - output_y + TITLEBAR_V_PADDING) * output_scale +
- ob_padding_above;
+ texture_box.x =
+ round((x - output_x + TITLEBAR_H_PADDING) * output_scale);
+ texture_box.y =
+ round((bg_y - output_y) * output_scale) + ob_padding_above;
float matrix[9];
wlr_matrix_project_box(matrix, &texture_box,
WL_OUTPUT_TRANSFORM_NORMAL,
0.0, output->wlr_output->transform_matrix);
- if (inner_width * output_scale - marks_ob_width < texture_box.width) {
- texture_box.width = inner_width * output_scale - marks_ob_width;
+ int inner_x = x - output_x + TITLEBAR_H_PADDING;
+ int ob_inner_width = scale_length(inner_width, inner_x, output_scale);
+ if (ob_inner_width - marks_ob_width < texture_box.width) {
+ texture_box.width = ob_inner_width - marks_ob_width;
}
render_texture(output->wlr_output, output_damage, title_texture,
&texture_box, matrix, con->alpha);
// Padding above
- if (ob_padding_above > 0) {
- memcpy(&color, colors->background, sizeof(float) * 4);
- premultiply_alpha(color, con->alpha);
- box.x = (x + TITLEBAR_H_PADDING) * output_scale;
- box.y = (y + TITLEBAR_V_PADDING) * output_scale;
- box.width = texture_box.width;
- box.height = ob_padding_above;
- render_rect(output->wlr_output, output_damage, &box, color);
- }
+ memcpy(&color, colors->background, sizeof(float) * 4);
+ premultiply_alpha(color, con->alpha);
+ box.x = texture_box.x + round(output_x * output_scale);
+ box.y = round((y + TITLEBAR_BORDER_THICKNESS) * output_scale);
+ box.width = texture_box.width;
+ box.height = ob_padding_above;
+ render_rect(output->wlr_output, output_damage, &box, color);
// Padding below
- if (ob_padding_below > 0) {
- memcpy(&color, colors->background, sizeof(float) * 4);
- premultiply_alpha(color, con->alpha);
- box.x = (x + TITLEBAR_H_PADDING) * output_scale;
- box.y = (y + TITLEBAR_V_PADDING) * output_scale +
- ob_padding_above + texture_box.height;
- box.width = texture_box.width;
- box.height = ob_padding_below;
- render_rect(output->wlr_output, output_damage, &box, color);
- }
+ box.y += ob_padding_above + texture_box.height;
+ box.height = ob_padding_below;
+ render_rect(output->wlr_output, output_damage, &box, color);
}
- // Padding above title
- memcpy(&color, colors->background, sizeof(float) * 4);
- premultiply_alpha(color, con->alpha);
- box.x = x + (layout == L_TABBED) * TITLEBAR_BORDER_THICKNESS;
- box.y = y + TITLEBAR_BORDER_THICKNESS;
- box.width = width - (layout == L_TABBED) * TITLEBAR_BORDER_THICKNESS * 2;
- box.height = TITLEBAR_V_PADDING - TITLEBAR_BORDER_THICKNESS;
- scale_box(&box, output_scale);
- render_rect(output->wlr_output, output_damage, &box, color);
-
- // Padding below title
- box.y = (y + TITLEBAR_V_PADDING + config->font_height) * output_scale;
- render_rect(output->wlr_output, output_damage, &box, color);
-
// Filler between title and marks
- box.width = inner_width * output_scale - title_ob_width - marks_ob_width;
+ box.width =
+ round(inner_width * output_scale) - title_ob_width - marks_ob_width;
if (box.width > 0) {
- box.x = (x + TITLEBAR_H_PADDING) * output_scale + title_ob_width;
- box.y = (y + TITLEBAR_V_PADDING) * output_scale;
- box.height = config->font_height * output_scale;
+ box.x = round((x + TITLEBAR_H_PADDING) * output_scale) + title_ob_width;
+ box.y = round(bg_y * output_scale);
+ box.height = ob_bg_height;
render_rect(output->wlr_output, output_damage, &box, color);
}
// Padding left of title
left_offset = (layout == L_TABBED) * TITLEBAR_BORDER_THICKNESS;
box.x = x + left_offset;
- box.y = y + TITLEBAR_V_PADDING;
+ box.y = y + TITLEBAR_BORDER_THICKNESS;
box.width = TITLEBAR_H_PADDING - left_offset;
- box.height = config->font_height;
+ box.height = (TITLEBAR_V_PADDING - TITLEBAR_BORDER_THICKNESS) * 2 +
+ config->font_height;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
// Padding right of marks
right_offset = (layout == L_TABBED) * TITLEBAR_BORDER_THICKNESS;
box.x = x + width - TITLEBAR_H_PADDING;
- box.y = y + TITLEBAR_V_PADDING;
+ box.y = y + TITLEBAR_BORDER_THICKNESS;
box.width = TITLEBAR_H_PADDING - right_offset;
- box.height = config->font_height;
+ box.height = (TITLEBAR_V_PADDING - TITLEBAR_BORDER_THICKNESS) * 2 +
+ config->font_height;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 20:21:04 +0000