From 5c7ce18379dfbf3ce95700cba964c567d157bc8d Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 11 Aug 2021 12:04:52 +0530
Subject: [PATCH] Move visual bell code into shaders.c

---
 kitty/screen.c  | 35 -----------------------------------
 kitty/screen.h  |  1 -
 kitty/shaders.c | 38 ++++++++++++++++++++++++++++++++++----
 3 files changed, 34 insertions(+), 40 deletions(-)

diff --git a/kitty/screen.c b/kitty/screen.c
index fa9740107..01f6497a1 100644
--- a/kitty/screen.c
+++ b/kitty/screen.c
@@ -1516,41 +1516,6 @@ screen_invert_colors(Screen *self) {
     return inverted;
 }
 
-static inline float
-ease_out_cubic(float phase) {
-    return 1.0f - powf(1.0f - phase, 3.0f);
-}
-
-static inline float
-ease_in_out_cubic(float phase) {
-    return phase < 0.5f ?
-        4.0f * powf(phase, 3.0f) :
-        1.0f - powf(-2.0f * phase + 2.0f, 3.0f) / 2.0f;
-}
-
-static inline float
-visual_bell_intensity(float phase) {
-    float peak = 0.2f;
-    float fade = 1.0f - peak;
-    if (phase < peak)
-        return ease_out_cubic(phase / peak);
-    else
-        return ease_in_out_cubic((1.0f - phase) / fade);
-}
-
-float
-screen_visual_bell_intensity(Screen *self) {
-    if (self->start_visual_bell_at > 0) {
-        monotonic_t progress = monotonic() - self->start_visual_bell_at;
-        monotonic_t duration = OPT(visual_bell_duration);
-        if (progress <= duration) {
-            return visual_bell_intensity((float)progress / duration);
-        }
-        else self->start_visual_bell_at = 0;
-    }
-    return 0.0f;
-}
-
 void
 screen_bell(Screen *self) {
     request_window_attention(self->window_id, OPT(enable_audio_bell));
diff --git a/kitty/screen.h b/kitty/screen.h
index be2304be6..c1c089065 100644
--- a/kitty/screen.h
+++ b/kitty/screen.h
@@ -207,7 +207,6 @@ void screen_apply_selection(Screen *self, void *address, size_t size);
 bool screen_is_selection_dirty(Screen *self);
 bool screen_has_selection(Screen*);
 bool screen_invert_colors(Screen *self);
-float screen_visual_bell_intensity(Screen *self);
 void screen_update_cell_data(Screen *self, void *address, FONTS_DATA_HANDLE, bool cursor_has_moved);
 bool screen_is_cursor_visible(Screen *self);
 bool screen_selection_range_for_line(Screen *self, index_type y, index_type *start, index_type *end);
diff --git a/kitty/shaders.c b/kitty/shaders.c
index 45b1dfb4a..2d2b2c972 100644
--- a/kitty/shaders.c
+++ b/kitty/shaders.c
@@ -458,7 +458,7 @@ draw_tint(bool premult, Screen *screen, GLfloat xstart, GLfloat ystart, GLfloat
     glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 }
 
-void
+static void
 draw_visual_bell_flash(GLfloat intensity, GLfloat xstart, GLfloat ystart, GLfloat w, GLfloat h, Screen *screen) {
     glEnable(GL_BLEND);
     // BLEND_PREMULT
@@ -630,6 +630,36 @@ send_cell_data_to_gpu(ssize_t vao_idx, ssize_t gvao_idx, GLfloat xstart, GLfloat
     return changed;
 }
 
+static float
+ease_out_cubic(float phase) {
+    return 1.0f - powf(1.0f - phase, 3.0f);
+}
+
+static float
+ease_in_out_cubic(float phase) {
+    return phase < 0.5f ?
+        4.0f * powf(phase, 3.0f) :
+        1.0f - powf(-2.0f * phase + 2.0f, 3.0f) / 2.0f;
+}
+
+static float
+visual_bell_intensity(float phase) {
+    static const float peak = 0.2f;
+    const float fade = 1.0f - peak;
+    return phase < peak ? ease_out_cubic(phase / peak) : ease_in_out_cubic((1.0f - phase) / fade);
+}
+
+static float
+get_visual_bell_intensity(Screen *screen) {
+    if (screen->start_visual_bell_at > 0) {
+        monotonic_t progress = monotonic() - screen->start_visual_bell_at;
+        monotonic_t duration = OPT(visual_bell_duration);
+        if (progress <= duration) return visual_bell_intensity((float)progress / duration);
+        screen->start_visual_bell_at = 0;
+    }
+    return 0.0f;
+}
+
 void
 draw_cells(ssize_t vao_idx, ssize_t gvao_idx, GLfloat xstart, GLfloat ystart, GLfloat dx, GLfloat dy, Screen *screen, OSWindow *os_window, bool is_active_window, bool can_be_focused) {
     CELL_BUFFERS;
@@ -668,9 +698,9 @@ draw_cells(ssize_t vao_idx, ssize_t gvao_idx, GLfloat xstart, GLfloat ystart, GL
         else draw_cells_simple(vao_idx, gvao_idx, screen);
     }
 
-    float intensity = screen_visual_bell_intensity(screen);
-    if (intensity > 0.0f) {
-        draw_visual_bell_flash((GLfloat)intensity, xstart, ystart, w, h, screen);
+    if (screen->start_visual_bell_at) {
+        GLfloat intensity = get_visual_bell_intensity(screen);
+        if (intensity > 0.0f) draw_visual_bell_flash(intensity, xstart, ystart, w, h, screen);
     }
 }
 // }}}