config: gamma-correct-blending: disable by default

CHANGELOG.md

@@ -91,6 +91,7 @@
 ### Changed
 
 * `cursor.color` moved to `colors.cursor`.
+* `gamma-correct-blending` now defaults to `no` instead of `yes`.
 
 
 ### Deprecated

config.c

@@ -1086,17 +1086,8 @@ parse_section_main(struct context *ctx)
         return true;
     }
 
-    else if (streq(key, "gamma-correct-blending")) {
-        bool gamma_correct;
-        if (!value_to_bool(ctx, &gamma_correct))
-            return false;
-
-        conf->gamma_correct =
-            gamma_correct
-                ? GAMMA_CORRECT_ENABLED
-                : GAMMA_CORRECT_DISABLED;
-        return true;
-    }
+    else if (streq(key, "gamma-correct-blending"))
+        return value_to_bool(ctx, &conf->gamma_correct);
 
     else if (streq(key, "initial-color-theme")) {
         _Static_assert(
@@ -3362,7 +3353,7 @@ config_load(struct config *conf, const char *conf_path,
         .underline_thickness = {.pt = 0., .px = -1},
         .strikeout_thickness = {.pt = 0., .px = -1},
         .dpi_aware = false,
-        .gamma_correct = GAMMA_CORRECT_AUTO,
+        .gamma_correct = false,
         .security = {
             .osc52 = OSC52_ENABLED,
         },

config.h

@@ -232,9 +232,7 @@ struct config {
     enum { STARTUP_WINDOWED, STARTUP_MAXIMIZED, STARTUP_FULLSCREEN } startup_mode;
 
     bool dpi_aware;
-    enum {GAMMA_CORRECT_DISABLED,
-          GAMMA_CORRECT_ENABLED,
-          GAMMA_CORRECT_AUTO} gamma_correct;
+    bool gamma_correct;
     struct config_font_list fonts[4];
     struct font_size_adjustment font_size_adjustment;
 

doc/foot.ini.5.scd

@@ -227,7 +227,7 @@ empty string to be set, but it must be quoted: *KEY=""*)
 	though. The amount of errors can be reduced by using 10-bit
 	surfaces; see *tweak.surface-bit-depth*.
 	
-	Default: enabled when compositor support is available
+	Default: _no_.
 
 *box-drawings-uses-font-glyphs*
 	Boolean. When disabled, foot generates box/line drawing characters

foot.ini

@@ -22,6 +22,7 @@
 # strikeout-thickness=<font strikeout thickness>
 # box-drawings-uses-font-glyphs=no
 # dpi-aware=no
+# gamma-correct-blending=no
 
 # initial-color-theme=1
 # initial-window-size-pixels=700x500  # Or,

render.c

@@ -5251,6 +5251,6 @@ render_xcursor_set(struct seat *seat, struct terminal *term,
 bool
 render_do_linear_blending(const struct terminal *term)
 {
-    return term->conf->gamma_correct != GAMMA_CORRECT_DISABLED &&
+    return term->conf->gamma_correct &&
            term->wl->color_management.img_description != NULL;
 }

tests/test-config.c

@@ -490,6 +490,7 @@ test_section_main(void)
     test_boolean(&ctx, &parse_section_main, "box-drawings-uses-font-glyphs", &conf.box_drawings_uses_font_glyphs);
     test_boolean(&ctx, &parse_section_main, "locked-title", &conf.locked_title);
     test_boolean(&ctx, &parse_section_main, "dpi-aware", &conf.dpi_aware);
+    test_boolean(&ctx, &parse_section_main, "gamma-correct-blending", &conf.gamma_correct);
 
     test_pt_or_px(&ctx, &parse_section_main, "font-size-adjustment", &conf.font_size_adjustment.pt_or_px);  /* TODO: test ‘N%’ values too */
     test_pt_or_px(&ctx, &parse_section_main, "line-height", &conf.line_height);

wayland.c

@@ -1980,7 +1980,7 @@ wayl_win_init(struct terminal *term, const char *token)
         xdg_toplevel_icon_v1_destroy(icon);
     }
 
-    if (term->conf->gamma_correct != GAMMA_CORRECT_DISABLED) {
+    if (term->conf->gamma_correct) {
         if (wayl->color_management.img_description != NULL) {
             xassert(wayl->color_management.manager != NULL);
 
@@ -1990,7 +1990,7 @@ wayl_win_init(struct terminal *term, const char *token)
             wp_color_management_surface_v1_set_image_description(
                 win->surface.color_management, wayl->color_management.img_description,
                 WP_COLOR_MANAGER_V1_RENDER_INTENT_PERCEPTUAL);
-        } else if (term->conf->gamma_correct == GAMMA_CORRECT_ENABLED) {
+        } else {
             if (wayl->color_management.manager == NULL) {
                 LOG_WARN(
                     "gamma-corrected-blending: disabling; "
@@ -2005,8 +2005,6 @@ wayl_win_init(struct terminal *term, const char *token)
                 LOG_WARN("  - TF: ext_linear");
                 LOG_WARN("  - primaries: sRGB");
             }
-        } else {
-            /* "auto" - don't warn */
         }
     }