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Pre-multiply alpha for tab decorations

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This commit is contained in:
Ryan Dwyer 2018-05-21 08:29:52 +10:00
parent 90607dc329
commit 048b29527b
1 changed files with 6 additions and 3 deletions
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9
sway/desktop/output.c
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@ -602,6 +602,7 @@ static void render_container_simple(struct sway_output *output,
static void render_tab(struct sway_output *output, pixman_region32_t *damage,
struct sway_container *parent, int child_index,
struct border_colors *colors, struct wlr_texture *title_texture) {
struct sway_container *con = parent->children->items[child_index];
float output_scale = output->wlr_output->scale;
float color[4];
struct wlr_box box;
@ -615,6 +616,7 @@ static void render_tab(struct sway_output *output, pixman_region32_t *damage,
// Single pixel bar above title
memcpy(&color, colors->border, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = x;
box.y = parent->y;
box.width = tab_width;
@ -665,6 +667,7 @@ static void render_tab(struct sway_output *output, pixman_region32_t *damage,
// Title background - above the text
memcpy(&color, colors->background, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = x + 1;
box.y = parent->y + 1;
box.width = tab_width - 2;
@ -707,7 +710,7 @@ static void render_tab_content(struct sway_output *output,
if (view->border != B_NONE) {
if (view->border_left) {
memcpy(&color, colors->child_border, sizeof(float) * 4);
color[3] *= con->alpha;
premultiply_alpha(color, con->alpha);
box.x = con->x;
box.y = con->y + config->border_thickness * 2 + config->font_height;
box.width = view->border_thickness;
@ -718,7 +721,7 @@ static void render_tab_content(struct sway_output *output,
if (view->border_right) {
memcpy(&color, colors->child_border, sizeof(float) * 4);
color[3] *= con->alpha;
premultiply_alpha(color, con->alpha);
box.x = view->x + view->width;
box.y = con->y + config->border_thickness * 2 + config->font_height;
box.width = view->border_thickness;
@ -729,7 +732,7 @@ static void render_tab_content(struct sway_output *output,
if (view->border_bottom) {
memcpy(&color, colors->child_border, sizeof(float) * 4);
color[3] *= con->alpha;
premultiply_alpha(color, con->alpha);
box.x = con->x;
box.y = view->y + view->height;
box.width = con->width;