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firefox/gfx/cairo/04-subpixel-aa-api.patch
Daniel Baumann 5e9a113729
Adding upstream version 140.0. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-25 09:37:52 +02:00

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# HG changeset patch
# User Jonathan Kew <jkew@mozilla.com>
# Date 1713886888 -3600
# Tue Apr 23 16:41:28 2024 +0100
# Node ID 5795122842a66df4f6217e4b5e9aac0e20b4389e
# Parent a0271c8e8524b6a3a11f76fe5854b402c71926a3
Apply cairo/04-subpixel-aa-api.patch (with modification in cairo-quartz-surface.c)
diff --git a/gfx/cairo/cairo/src/cairo-compositor-private.h b/gfx/cairo/cairo/src/cairo-compositor-private.h
--- a/gfx/cairo/cairo/src/cairo-compositor-private.h
+++ b/gfx/cairo/cairo/src/cairo-compositor-private.h
@@ -85,7 +85,8 @@ struct cairo_compositor {
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
- cairo_bool_t overlap);
+ cairo_bool_t overlap,
+ cairo_bool_t permit_subpixel_antialiasing);
};
struct cairo_mask_compositor {
diff --git a/gfx/cairo/cairo/src/cairo-compositor.c b/gfx/cairo/cairo/src/cairo-compositor.c
--- a/gfx/cairo/cairo/src/cairo-compositor.c
+++ b/gfx/cairo/cairo/src/cairo-compositor.c
@@ -290,7 +290,8 @@ cairo_int_status_t
compositor = compositor->delegate;
status = compositor->glyphs (compositor, &extents,
- scaled_font, glyphs, num_glyphs, overlap);
+ scaled_font, glyphs, num_glyphs, overlap,
+ surface->permit_subpixel_antialiasing);
compositor = compositor->delegate;
} while (status == CAIRO_INT_STATUS_UNSUPPORTED);
diff --git a/gfx/cairo/cairo/src/cairo-no-compositor.c b/gfx/cairo/cairo/src/cairo-no-compositor.c
--- a/gfx/cairo/cairo/src/cairo-no-compositor.c
+++ b/gfx/cairo/cairo/src/cairo-no-compositor.c
@@ -91,7 +91,8 @@ static cairo_int_status_t
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
- cairo_bool_t overlap)
+ cairo_bool_t overlap,
+ cairo_bool_t permit_subpixel_antialiasing)
{
ASSERT_NOT_REACHED;
return CAIRO_INT_STATUS_NOTHING_TO_DO;
diff --git a/gfx/cairo/cairo/src/cairo-quartz-surface.c b/gfx/cairo/cairo/src/cairo-quartz-surface.c
--- a/gfx/cairo/cairo/src/cairo-quartz-surface.c
+++ b/gfx/cairo/cairo/src/cairo-quartz-surface.c
@@ -1871,7 +1871,8 @@ static cairo_int_status_t
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
- cairo_bool_t overlap)
+ cairo_bool_t overlap,
+ cairo_bool_t permit_subpixel_antialiasing)
{
CGAffineTransform textTransform, invTextTransform;
CGGlyph glyphs_static[CAIRO_STACK_ARRAY_LENGTH (CGPoint)];
@@ -1885,6 +1886,7 @@ static cairo_int_status_t
CTFontRef ctFont = NULL;
cairo_bool_t didForceFontSmoothing = FALSE;
+ cairo_antialias_t effective_antialiasing;
if (cairo_scaled_font_get_type (scaled_font) != CAIRO_FONT_TYPE_QUARTZ)
return CAIRO_INT_STATUS_UNSUPPORTED;
@@ -1904,6 +1906,14 @@ static cairo_int_status_t
ctFont = _cairo_quartz_scaled_font_get_ct_font (scaled_font);
_cairo_quartz_set_antialiasing (state.cgMaskContext, scaled_font->options.antialias);
+ effective_antialiasing = scaled_font->options.antialias;
+ if (effective_antialiasing == CAIRO_ANTIALIAS_SUBPIXEL &&
+ !permit_subpixel_antialiasing) {
+ effective_antialiasing = CAIRO_ANTIALIAS_GRAY;
+ }
+
+ _cairo_quartz_set_antialiasing (state.cgMaskContext, effective_antialiasing);
+
if (num_glyphs > ARRAY_LENGTH (glyphs_static)) {
cg_glyphs = (CGGlyph*) _cairo_malloc_ab (num_glyphs, sizeof (CGGlyph) + sizeof (CGPoint));
if (unlikely (cg_glyphs == NULL)) {
diff --git a/gfx/cairo/cairo/src/cairo-surface-private.h b/gfx/cairo/cairo/src/cairo-surface-private.h
--- a/gfx/cairo/cairo/src/cairo-surface-private.h
+++ b/gfx/cairo/cairo/src/cairo-surface-private.h
@@ -71,6 +71,7 @@ struct _cairo_surface {
unsigned has_font_options : 1;
unsigned owns_device : 1;
unsigned is_vector : 1;
+ unsigned permit_subpixel_antialiasing : 1;
cairo_user_data_array_t user_data;
cairo_user_data_array_t mime_data;
diff --git a/gfx/cairo/cairo/src/cairo-surface.c b/gfx/cairo/cairo/src/cairo-surface.c
--- a/gfx/cairo/cairo/src/cairo-surface.c
+++ b/gfx/cairo/cairo/src/cairo-surface.c
@@ -114,6 +114,7 @@ const cairo_surface_t name = { \
FALSE, /* has_font_options */ \
FALSE, /* owns_device */ \
FALSE, /* is_vector */ \
+ FALSE, /* permit_subpixel_antialiasing */ \
{ 0, 0, 0, NULL, }, /* user_data */ \
{ 0, 0, 0, NULL, }, /* mime_data */ \
{ 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 }, /* device_transform */ \
@@ -426,6 +427,7 @@ void
surface->serial = 0;
surface->damage = NULL;
surface->owns_device = (device != NULL);
+ surface->permit_subpixel_antialiasing = TRUE;
_cairo_user_data_array_init (&surface->user_data);
_cairo_user_data_array_init (&surface->mime_data);
@@ -461,6 +463,8 @@ static void
_cairo_font_options_fini (&options);
}
+ surface->permit_subpixel_antialiasing = other->permit_subpixel_antialiasing;
+
cairo_surface_set_fallback_resolution (surface,
other->x_fallback_resolution,
other->y_fallback_resolution);
@@ -1626,6 +1630,51 @@ cairo_surface_get_font_options (cairo_su
_cairo_font_options_init_copy (options, &surface->font_options);
}
+/**
+ * cairo_surface_set_subpixel_antialiasing:
+ * @surface: a #cairo_surface_t
+ *
+ * Sets whether the surface permits subpixel antialiasing. By default,
+ * surfaces permit subpixel antialiasing.
+ *
+ * Enabling subpixel antialiasing for CONTENT_COLOR_ALPHA surfaces generally
+ * requires that the pixels in the areas under a subpixel antialiasing
+ * operation already be opaque.
+ **/
+void
+cairo_surface_set_subpixel_antialiasing (cairo_surface_t *surface,
+ cairo_subpixel_antialiasing_t enabled)
+{
+ if (surface->status)
+ return;
+
+ if (surface->finished) {
+ _cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED);
+ return;
+ }
+
+ surface->permit_subpixel_antialiasing =
+ enabled == CAIRO_SUBPIXEL_ANTIALIASING_ENABLED;
+}
+
+/**
+ * cairo_surface_get_subpixel_antialiasing:
+ * @surface: a #cairo_surface_t
+ *
+ * Gets whether the surface supports subpixel antialiasing. By default,
+ * CAIRO_CONTENT_COLOR surfaces support subpixel antialiasing but other
+ * surfaces do not.
+ **/
+cairo_subpixel_antialiasing_t
+cairo_surface_get_subpixel_antialiasing (cairo_surface_t *surface)
+{
+ if (surface->status)
+ return CAIRO_SUBPIXEL_ANTIALIASING_DISABLED;
+
+ return surface->permit_subpixel_antialiasing ?
+ CAIRO_SUBPIXEL_ANTIALIASING_ENABLED : CAIRO_SUBPIXEL_ANTIALIASING_DISABLED;
+}
+
cairo_status_t
_cairo_surface_flush (cairo_surface_t *surface, unsigned flags)
{
diff --git a/gfx/cairo/cairo/src/cairo-xcb-private.h b/gfx/cairo/cairo/src/cairo-xcb-private.h
--- a/gfx/cairo/cairo/src/cairo-xcb-private.h
+++ b/gfx/cairo/cairo/src/cairo-xcb-private.h
@@ -443,7 +443,8 @@ cairo_private cairo_int_status_t
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
- cairo_bool_t overlap);
+ cairo_bool_t overlap,
+ cairo_bool_t permit_subpixel_antialiasing);
cairo_private void
_cairo_xcb_surface_scaled_font_fini (cairo_scaled_font_t *scaled_font);
diff --git a/gfx/cairo/cairo/src/cairo-xcb-surface-render.c b/gfx/cairo/cairo/src/cairo-xcb-surface-render.c
--- a/gfx/cairo/cairo/src/cairo-xcb-surface-render.c
+++ b/gfx/cairo/cairo/src/cairo-xcb-surface-render.c
@@ -4814,7 +4814,8 @@ cairo_int_status_t
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
- cairo_bool_t overlap)
+ cairo_bool_t overlap,
+ cairo_bool_t permit_subpixel_antialiasing)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) composite->surface;
cairo_operator_t op = composite->op;
diff --git a/gfx/cairo/cairo/src/cairo-xcb-surface.c b/gfx/cairo/cairo/src/cairo-xcb-surface.c
--- a/gfx/cairo/cairo/src/cairo-xcb-surface.c
+++ b/gfx/cairo/cairo/src/cairo-xcb-surface.c
@@ -906,7 +906,8 @@ static cairo_int_status_t
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
- cairo_bool_t overlap)
+ cairo_bool_t overlap,
+ cairo_bool_t permit_subpixel_antialiasing)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
diff --git a/gfx/cairo/cairo/src/cairo.h b/gfx/cairo/cairo/src/cairo.h
--- a/gfx/cairo/cairo/src/cairo.h
+++ b/gfx/cairo/cairo/src/cairo.h
@@ -2737,6 +2737,26 @@ cairo_surface_show_page (cairo_surface_t
cairo_public cairo_bool_t
cairo_surface_has_show_text_glyphs (cairo_surface_t *surface);
+/**
+ * _cairo_subpixel_antialiasing_t:
+ * @CAIRO_SUBPIXEL_ANTIALIASING_ENABLED: subpixel antialiasing is enabled
+ * for this surface.
+ * @CAIRO_SUBPIXEL_ANTIALIASING_DISABLED: subpixel antialiasing is disabled
+ * for this surface.
+ */
+typedef enum _cairo_subpixel_antialiasing_t {
+ CAIRO_SUBPIXEL_ANTIALIASING_ENABLED,
+ CAIRO_SUBPIXEL_ANTIALIASING_DISABLED
+} cairo_subpixel_antialiasing_t;
+
+cairo_public void
+cairo_surface_set_subpixel_antialiasing (cairo_surface_t *surface,
+ cairo_subpixel_antialiasing_t enabled);
+
+cairo_public cairo_subpixel_antialiasing_t
+cairo_surface_get_subpixel_antialiasing (cairo_surface_t *surface);
+
+
/* Image-surface functions */
cairo_public cairo_surface_t *
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