* bug#71850: [PATCH] macOS (Cocoa) alpha-background
[not found] <CABtg_LnGdfnu_+x24j4aUbkcp9w5Mn3zyXVntBos+29qykxOgw@mail.gmail.com>
@ 2024-06-30 5:09 ` Stefan Kangas
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From: Stefan Kangas @ 2024-06-30 5:09 UTC (permalink / raw)
To: 71850; +Cc: Jon Rubens, Po Lu
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Severity: wishlist
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From: Jon Rubens <jonathan.rubens@gmail.com>
Date: Thu, 27 Jun 2024 17:38:29 -0700
Subject: Re: macOS (Cocoa) alpha-background
To: Stefan Kangas <stefankangas@gmail.com>
Cc: Po Lu <luangruo@yahoo.com>, emacs-devel@gnu.org
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> Copyright Form sent off-list.
Sent in the completed form.
Attached is an updated patch with the proper formatting updated for Emacs-30.
--
Jon
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From 2695e80764bd254d12db3a627d2c020b102bf337 Mon Sep 17 00:00:00 2001
From: Jonathan Rubens <jonathanrubens@gmail.com>
Date: Thu, 27 Jun 2024 16:52:36 -0700
Subject: [PATCH] Add alpha-background feature to MacOS Emacs
---
src/macfont.m | 10 ++++++++--
src/nsfns.m | 42 +++++++++++++++++++++++++++++++++--------
src/nsterm.m | 52 +++++++++++++++++++++++++++++++--------------------
3 files changed, 74 insertions(+), 30 deletions(-)
diff --git a/src/macfont.m b/src/macfont.m
index e3b3d40df43..a2044f23b9d 100644
--- a/src/macfont.m
+++ b/src/macfont.m
@@ -2994,9 +2994,14 @@ So we use CTFontDescriptorCreateMatchingFontDescriptor (no
CG_SET_FILL_COLOR_WITH_FACE_FOREGROUND (context, face);
else
CG_SET_FILL_COLOR_WITH_FRAME_CURSOR (context, f);
- }
+ CGContextSetAlpha (context, 1);
+ }
else
- CG_SET_FILL_COLOR_WITH_FACE_BACKGROUND (context, face);
+ {
+ CGContextSetAlpha (context, f->alpha_background);
+ CG_SET_FILL_COLOR_WITH_FACE_BACKGROUND (context, face);
+ }
+ CGContextClearRect (context, background_rect);
CGContextFillRects (context, &background_rect, 1);
}
@@ -3005,6 +3010,7 @@ So we use CTFontDescriptorCreateMatchingFontDescriptor (no
CGAffineTransform atfm;
CGContextScaleCTM (context, 1, -1);
+ CGContextSetAlpha (context, 1);
if (s->hl == DRAW_CURSOR)
{
if (face && (NS_FACE_BACKGROUND (face)
diff --git a/src/nsfns.m b/src/nsfns.m
index add7a93dfba..6ee0f9cf707 100644
--- a/src/nsfns.m
+++ b/src/nsfns.m
@@ -299,7 +299,7 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side.
struct face *face;
NSColor *col;
NSView *view = FRAME_NS_VIEW (f);
- EmacsCGFloat alpha;
+ EmacsCGFloat alpha = f->alpha_background;
block_input ();
if (ns_lisp_to_color (arg, &col))
@@ -314,11 +314,10 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side.
f->output_data.ns->background_color = col;
FRAME_BACKGROUND_PIXEL (f) = [col unsignedLong];
- alpha = [col alphaComponent];
if (view != nil)
{
- [[view window] setBackgroundColor: col];
+ [[view window] setBackgroundColor: [col colorWithAlphaComponent: alpha]];
if (alpha != (EmacsCGFloat) 1.0)
[[view window] setOpaque: NO];
@@ -328,10 +327,7 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side.
face = FRAME_DEFAULT_FACE (f);
if (face)
{
- col = [NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)];
- face->background = [[col colorWithAlphaComponent: alpha]
- unsignedLong];
-
+ face->background = [col unsignedLong];
update_face_from_frame_parameter (f, Qbackground_color, arg);
}
@@ -344,6 +340,36 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side.
unblock_input ();
}
+static void
+ns_set_alpha_background (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
+{
+ NSView *view = FRAME_NS_VIEW (f);
+ double alpha = 1.0;
+
+ if (NILP (arg))
+ alpha = 1.0;
+ else if (FLOATP (arg))
+ {
+ alpha = XFLOAT_DATA (arg);
+ if (! (0 <= alpha && alpha <= 1.0))
+ args_out_of_range (make_float (0.0), make_float (1.0));
+ }
+ else if (FIXNUMP (arg))
+ {
+ EMACS_INT ialpha = XFIXNUM (arg);
+ if (! (0 <= ialpha && ialpha <= 100))
+ args_out_of_range (make_fixnum (0), make_fixnum (100));
+ alpha = ialpha / 100.0;
+ }
+ else
+ wrong_type_argument (Qnumberp, arg);
+
+ f->alpha_background = alpha;
+ [[view window] setBackgroundColor: [f->output_data.ns->background_color
+ colorWithAlphaComponent: alpha]];
+ recompute_basic_faces (f);
+ SET_FRAME_GARBAGED (f);
+}
static void
ns_set_cursor_color (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
@@ -1109,7 +1135,7 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side.
ns_set_z_group,
0, /* x_set_override_redirect */
gui_set_no_special_glyphs,
- gui_set_alpha_background,
+ ns_set_alpha_background,
NULL,
#ifdef NS_IMPL_COCOA
ns_set_appearance,
diff --git a/src/nsterm.m b/src/nsterm.m
index 794630de1c1..fe09de140dd 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -2627,8 +2627,10 @@ Hide the window (X11 semantics)
block_input ();
ns_focus (f, &r, 1);
- [[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND
- (FACE_FROM_ID (f, DEFAULT_FACE_ID))] set];
+ [[[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND
+ (FACE_FROM_ID (f, DEFAULT_FACE_ID))]
+ colorWithAlphaComponent: f->alpha
+ _background] set];
NSRectFill (r);
ns_unfocus (f);
@@ -2656,7 +2658,8 @@ Hide the window (X11 semantics)
r = NSIntersectionRect (r, [view frame]);
ns_focus (f, &r, 1);
- [[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)] set];
+ [[[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)]
+ colorWithAlphaComponent: f->alpha_background] set];
NSRectFill (r);
@@ -2760,7 +2763,8 @@ Hide the window (X11 semantics)
return;
ns_focus (f, NULL, 1);
- [[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)] set];
+ [[[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)]
+ colorWithAlphaComponent: f->alpha_background] set];
NSRectFill (NSMakeRect (0, margin, width, border));
NSRectFill (NSMakeRect (0, 0, border, height));
NSRectFill (NSMakeRect (0, margin, width, border));
@@ -2812,7 +2816,8 @@ Hide the window (X11 semantics)
NSRect r = NSMakeRect (0, y, FRAME_PIXEL_WIDTH (f), height);
ns_focus (f, &r, 1);
- [[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)] set];
+ [[[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)]
+ colorWithAlphaComponent: f->alpha_background] set];
NSRectFill (NSMakeRect (0, y, width, height));
NSRectFill (NSMakeRect (FRAME_PIXEL_WIDTH (f) - width,
y, width, height));
@@ -2976,8 +2981,8 @@ Hide the window (X11 semantics)
if (! NSIsEmptyRect (clearRect))
{
NSTRACE_RECT ("clearRect", clearRect);
-
- [[NSColor colorWithUnsignedLong:face->background] set];
+ [[[NSColor colorWithUnsignedLong:face->background]
+ colorWithAlphaComponent: f->alpha_background] set];
NSRectFill (clearRect);
}
@@ -3008,7 +3013,7 @@ Hide the window (X11 semantics)
else
bm_color = f->output_data.ns->cursor_color;
- [bm_color set];
+ [[bm_color colorWithAlphaComponent:f->alpha_background] set];
[bmp fill];
[bmp release];
@@ -3797,7 +3802,8 @@ Function modeled after x_draw_glyph_string_box ().
if (s->face->box == FACE_SIMPLE_BOX && s->face->box_color)
{
ns_draw_box (r, abs (hthickness), abs (vthickness),
- [NSColor colorWithUnsignedLong:face->box_color],
+ [[NSColor colorWithUnsignedLong:face->box_color]
+ colorWithAlphaComponent: s->f->alpha_background],
left_p, right_p);
}
else
@@ -3842,7 +3848,8 @@ Function modeled after x_draw_glyph_string_box ().
{
if (s->hl != DRAW_CURSOR)
[(NS_FACE_BACKGROUND (face) != 0
- ? [NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)]
+ ? [[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)]
+ colorWithAlphaComponent: s->f->alpha_background]
: FRAME_BACKGROUND_COLOR (s->f)) set];
else if (face && (NS_FACE_BACKGROUND (face)
== [(NSColor *) FRAME_CURSOR_COLOR (s->f)
@@ -3981,7 +3988,8 @@ Function modeled after x_draw_glyph_string_box ().
otherwise, since we composite the image under NS (instead of mucking
with its background color), we must clear just the image area. */
- [[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)] set];
+ [[[NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND (face)]
+ colorWithAlphaComponent: s->f->alpha_background] set];
if (bg_height > s->slice.height || s->img->hmargin || s->img->vmargin
|| s->img->mask || s->img->pixmap == 0 || s->width != s->background_width)
@@ -4051,7 +4059,8 @@ Function modeled after x_draw_glyph_string_box ().
if (s->hl == DRAW_CURSOR)
{
[FRAME_CURSOR_COLOR (s->f) set];
- tdCol = [NSColor colorWithUnsignedLong: NS_FACE_BACKGROUND (face)];
+ tdCol = [[NSColor colorWithUnsignedLong: NS_FACE_BACKGROUND (face)]
+ colorWithAlphaComponent: s->f->alpha_background];
}
else
tdCol = [NSColor colorWithUnsignedLong: NS_FACE_FOREGROUND (face)];
@@ -4144,10 +4153,12 @@ Function modeled after x_draw_glyph_string_box ().
face = FACE_FROM_ID (s->f, MOUSE_FACE_ID);
prepare_face_for_display (s->f, face);
- [[NSColor colorWithUnsignedLong: face->background] set];
+ [[[NSColor colorWithUnsignedLong: face->background]
+ colorWithAlphaComponent: s->f->alpha_background] set];
}
else
- [[NSColor colorWithUnsignedLong: s->face->background] set];
+ [[[NSColor colorWithUnsignedLong: s->face->background]
+ colorWithAlphaComponent: s->f->alpha_background] set];
NSRectFill (NSMakeRect (x, y, w, h));
}
}
@@ -4178,7 +4189,8 @@ Function modeled after x_draw_glyph_string_box ().
else if (s->stippled_p)
[[dpyinfo->bitmaps[s->face->stipple - 1].img stippleMask] set];
else
- [[NSColor colorWithUnsignedLong: s->face->background] set];
+ [[[NSColor colorWithUnsignedLong: s->face->background]
+ colorWithAlphaComponent: s->f->alpha_background] set];
NSRectFill (NSMakeRect (x, s->y, background_width, s->height));
}
@@ -8545,8 +8557,8 @@ - (void)toggleFullScreen: (id)sender
}
[w setContentView:[fw contentView]];
- [w setBackgroundColor: col];
- if ([col alphaComponent] != (EmacsCGFloat) 1.0)
+ [w setBackgroundColor: [col colorWithAlphaComponent: f->alpha_background]];
+ if (f->alpha_background != (EmacsCGFloat) 1.0)
[w setOpaque: NO];
f->border_width = [w borderWidth];
@@ -9283,9 +9295,9 @@ - (instancetype) initWithEmacsFrame: (struct frame *) f
f->border_width = [self borderWidth];
col = [NSColor colorWithUnsignedLong:NS_FACE_BACKGROUND
- (FACE_FROM_ID (f, DEFAULT_FACE_ID))];
- [self setBackgroundColor:col];
- if ([col alphaComponent] != (EmacsCGFloat) 1.0)
+ (FACE_FROM_ID (f, DEFAULT_FACE_ID))];
+ [self setBackgroundColor:[col colorWithAlphaComponent:f->alpha_background]];
+ if (f->alpha_background != (EmacsCGFloat) 1.0)
[self setOpaque:NO];
/* toolbar support */
--
2.39.3 (Apple Git-146)
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[not found] <CABtg_LnGdfnu_+x24j4aUbkcp9w5Mn3zyXVntBos+29qykxOgw@mail.gmail.com>
2024-06-30 5:09 ` bug#71850: [PATCH] macOS (Cocoa) alpha-background Stefan Kangas
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