mirror of
https://github.com/mozilla/gecko-dev.git
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520 lines
19 KiB
Diff
520 lines
19 KiB
Diff
# HG changeset patch
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# User Robert O'Callahan <robert@ocallahan.org>
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# Date 1294019288 -46800
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# Node ID 8857392e37aea7475ed6d8ee4b45023e1233bcec
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# Parent c53f60831c43cca397dfed8adf8d350aeec7d3ca
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Bug 363861. Part 2: Introduce cairo_surface_get/set_subpixel_antialiasing. r=jrmuizel,sr=vlad,a=blocking
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diff --git a/gfx/cairo/cairo/src/cairo-quartz-surface.c b/gfx/cairo/cairo/src/cairo-quartz-surface.c
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--- a/gfx/cairo/cairo/src/cairo-quartz-surface.c
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+++ b/gfx/cairo/cairo/src/cairo-quartz-surface.c
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@@ -2473,16 +2473,17 @@ _cairo_quartz_surface_show_glyphs (void
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cairo_int_status_t rv = CAIRO_STATUS_SUCCESS;
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cairo_quartz_drawing_state_t state;
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float xprev, yprev;
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int i;
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CGFontRef cgfref = NULL;
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cairo_bool_t isClipping = FALSE;
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cairo_bool_t didForceFontSmoothing = FALSE;
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+ cairo_antialias_t effective_antialiasing;
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if (IS_EMPTY(surface))
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return CAIRO_STATUS_SUCCESS;
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if (num_glyphs <= 0)
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return CAIRO_STATUS_SUCCESS;
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if (cairo_scaled_font_get_type (scaled_font) != CAIRO_FONT_TYPE_QUARTZ)
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@@ -2514,16 +2515,22 @@ _cairo_quartz_surface_show_glyphs (void
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goto BAIL;
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}
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/* this doesn't addref */
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cgfref = _cairo_quartz_scaled_font_get_cg_font_ref (scaled_font);
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CGContextSetFont (state.context, cgfref);
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CGContextSetFontSize (state.context, 1.0);
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+ effective_antialiasing = scaled_font->options.antialias;
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+ if (effective_antialiasing == CAIRO_ANTIALIAS_SUBPIXEL &&
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+ !surface->base.permit_subpixel_antialiasing) {
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+ effective_antialiasing = CAIRO_ANTIALIAS_GRAY;
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+ }
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+
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switch (scaled_font->options.antialias) {
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case CAIRO_ANTIALIAS_SUBPIXEL:
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CGContextSetShouldAntialias (state.context, TRUE);
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CGContextSetShouldSmoothFonts (state.context, TRUE);
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if (CGContextSetAllowsFontSmoothingPtr &&
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!CGContextGetAllowsFontSmoothingPtr (state.context))
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{
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didForceFontSmoothing = TRUE;
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diff --git a/gfx/cairo/cairo/src/cairo-surface-private.h b/gfx/cairo/cairo/src/cairo-surface-private.h
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--- a/gfx/cairo/cairo/src/cairo-surface-private.h
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+++ b/gfx/cairo/cairo/src/cairo-surface-private.h
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@@ -58,16 +58,17 @@ struct _cairo_surface {
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cairo_reference_count_t ref_count;
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cairo_status_t status;
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unsigned int unique_id;
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unsigned finished : 1;
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unsigned is_clear : 1;
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unsigned has_font_options : 1;
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+ unsigned permit_subpixel_antialiasing : 1;
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cairo_user_data_array_t user_data;
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cairo_user_data_array_t mime_data;
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cairo_matrix_t device_transform;
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cairo_matrix_t device_transform_inverse;
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/* The actual resolution of the device, in dots per inch. */
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diff --git a/gfx/cairo/cairo/src/cairo-surface.c b/gfx/cairo/cairo/src/cairo-surface.c
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--- a/gfx/cairo/cairo/src/cairo-surface.c
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+++ b/gfx/cairo/cairo/src/cairo-surface.c
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@@ -49,17 +49,18 @@ const cairo_surface_t name = { \
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NULL, /* backend */ \
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CAIRO_SURFACE_TYPE_IMAGE, /* type */ \
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CAIRO_CONTENT_COLOR, /* content */ \
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CAIRO_REFERENCE_COUNT_INVALID, /* ref_count */ \
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status, /* status */ \
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0, /* unique id */ \
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FALSE, /* finished */ \
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TRUE, /* is_clear */ \
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- FALSE, /* has_font_options */ \
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+ FALSE, /* has_font_options */ \
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+ FALSE, /* permit_subpixel_antialiasing */ \
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{ 0, 0, 0, NULL, }, /* user_data */ \
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{ 0, 0, 0, NULL, }, /* mime_data */ \
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{ 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 }, /* device_transform */ \
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{ 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 }, /* device_transform_inverse */ \
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0.0, /* x_resolution */ \
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0.0, /* y_resolution */ \
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0.0, /* x_fallback_resolution */ \
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0.0, /* y_fallback_resolution */ \
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@@ -342,46 +343,48 @@ _cairo_surface_init (cairo_surface_t *
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surface->content = content;
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surface->type = backend->type;
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CAIRO_REFERENCE_COUNT_INIT (&surface->ref_count, 1);
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surface->status = CAIRO_STATUS_SUCCESS;
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surface->unique_id = _cairo_surface_allocate_unique_id ();
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surface->finished = FALSE;
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surface->is_clear = FALSE;
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+ surface->has_font_options = FALSE;
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+ surface->permit_subpixel_antialiasing = TRUE;
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_cairo_user_data_array_init (&surface->user_data);
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_cairo_user_data_array_init (&surface->mime_data);
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cairo_matrix_init_identity (&surface->device_transform);
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cairo_matrix_init_identity (&surface->device_transform_inverse);
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surface->x_resolution = CAIRO_SURFACE_RESOLUTION_DEFAULT;
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surface->y_resolution = CAIRO_SURFACE_RESOLUTION_DEFAULT;
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surface->x_fallback_resolution = CAIRO_SURFACE_FALLBACK_RESOLUTION_DEFAULT;
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surface->y_fallback_resolution = CAIRO_SURFACE_FALLBACK_RESOLUTION_DEFAULT;
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_cairo_array_init (&surface->snapshots, sizeof (cairo_surface_t *));
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surface->snapshot_of = NULL;
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-
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- surface->has_font_options = FALSE;
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}
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static void
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_cairo_surface_copy_similar_properties (cairo_surface_t *surface,
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cairo_surface_t *other)
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{
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if (other->has_font_options || other->backend != surface->backend) {
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cairo_font_options_t options;
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cairo_surface_get_font_options (other, &options);
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_cairo_surface_set_font_options (surface, &options);
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}
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+ surface->permit_subpixel_antialiasing = other->permit_subpixel_antialiasing;
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+
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cairo_surface_set_fallback_resolution (surface,
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other->x_fallback_resolution,
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other->y_fallback_resolution);
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}
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cairo_surface_t *
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_cairo_surface_create_similar_scratch (cairo_surface_t *other,
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cairo_content_t content,
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@@ -2482,16 +2485,67 @@ cairo_surface_has_show_text_glyphs (cair
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if (surface->backend->has_show_text_glyphs)
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return surface->backend->has_show_text_glyphs (surface);
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else
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return surface->backend->show_text_glyphs != NULL;
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}
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slim_hidden_def (cairo_surface_has_show_text_glyphs);
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+/**
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+ * cairo_surface_set_subpixel_antialiasing:
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+ * @surface: a #cairo_surface_t
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+ *
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+ * Sets whether the surface permits subpixel antialiasing. By default,
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+ * surfaces permit subpixel antialiasing.
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+ *
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+ * Enabling subpixel antialiasing for CONTENT_COLOR_ALPHA surfaces generally
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+ * requires that the pixels in the areas under a subpixel antialiasing
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+ * operation already be opaque.
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+ *
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+ * Since: 1.12
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+ **/
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+void
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+cairo_surface_set_subpixel_antialiasing (cairo_surface_t *surface,
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+ cairo_subpixel_antialiasing_t enabled)
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+{
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+ if (surface->status)
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+ return;
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+
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+ if (surface->finished) {
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+ _cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED);
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+ return;
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+ }
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+
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+ surface->permit_subpixel_antialiasing =
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+ enabled == CAIRO_SUBPIXEL_ANTIALIASING_ENABLED;
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+}
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+slim_hidden_def (cairo_surface_set_subpixel_antialiasing);
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+
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+/**
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+ * cairo_surface_get_subpixel_antialiasing:
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+ * @surface: a #cairo_surface_t
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+ *
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+ * Gets whether the surface supports subpixel antialiasing. By default,
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+ * CAIRO_CONTENT_COLOR surfaces support subpixel antialiasing but other
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+ * surfaces do not.
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+ *
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+ * Since: 1.12
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+ **/
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+cairo_subpixel_antialiasing_t
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+cairo_surface_get_subpixel_antialiasing (cairo_surface_t *surface)
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+{
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+ if (surface->status)
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+ return CAIRO_SUBPIXEL_ANTIALIASING_DISABLED;
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+
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+ return surface->permit_subpixel_antialiasing ?
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+ CAIRO_SUBPIXEL_ANTIALIASING_ENABLED : CAIRO_SUBPIXEL_ANTIALIASING_DISABLED;
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+}
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+slim_hidden_def (cairo_surface_get_subpixel_antialiasing);
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+
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/* Note: the backends may modify the contents of the glyph array as long as
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* they do not return %CAIRO_INT_STATUS_UNSUPPORTED. This makes it possible to
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* avoid copying the array again and again, and edit it in-place.
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* Backends are in fact free to use the array as a generic buffer as they
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* see fit.
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*
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* For show_glyphs backend method, and NOT for show_text_glyphs method,
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* when they do return UNSUPPORTED, they may adjust remaining_glyphs to notify
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diff --git a/gfx/cairo/cairo/src/cairo-win32-font.c b/gfx/cairo/cairo/src/cairo-win32-font.c
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--- a/gfx/cairo/cairo/src/cairo-win32-font.c
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+++ b/gfx/cairo/cairo/src/cairo-win32-font.c
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@@ -1380,16 +1380,17 @@ _cairo_win32_scaled_font_show_glyphs (vo
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cairo_win32_surface_t *surface = (cairo_win32_surface_t *)generic_surface;
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cairo_status_t status;
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if (width == 0 || height == 0)
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return CAIRO_STATUS_SUCCESS;
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if (_cairo_surface_is_win32 (generic_surface) &&
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surface->format == CAIRO_FORMAT_RGB24 &&
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+ (generic_surface->permit_subpixel_antialiasing || scaled_font->quality != CLEARTYPE_QUALITY) &&
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op == CAIRO_OPERATOR_OVER &&
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_cairo_pattern_is_opaque_solid (pattern)) {
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cairo_solid_pattern_t *solid_pattern = (cairo_solid_pattern_t *)pattern;
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/* When compositing OVER on a GDI-understood surface, with a
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* solid opaque color, we can just call ExtTextOut directly.
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*/
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@@ -1411,16 +1412,18 @@ _cairo_win32_scaled_font_show_glyphs (vo
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* surface by drawing the the glyphs onto a DIB, black-on-white then
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* inverting. GDI outputs gamma-corrected images so inverted black-on-white
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* is very different from white-on-black. We favor the more common
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* case where the final output is dark-on-light.
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*/
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cairo_win32_surface_t *tmp_surface;
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cairo_surface_t *mask_surface;
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cairo_surface_pattern_t mask;
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+ cairo_bool_t use_subpixel_antialiasing =
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+ scaled_font->quality == CLEARTYPE_QUALITY && generic_surface->permit_subpixel_antialiasing;
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RECT r;
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tmp_surface = (cairo_win32_surface_t *)cairo_win32_surface_create_with_dib (CAIRO_FORMAT_ARGB32, width, height);
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if (tmp_surface->base.status)
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return tmp_surface->base.status;
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r.left = 0;
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r.top = 0;
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@@ -1432,17 +1435,17 @@ _cairo_win32_scaled_font_show_glyphs (vo
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scaled_font, RGB (0, 0, 0),
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dest_x, dest_y,
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glyphs, num_glyphs);
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if (status) {
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cairo_surface_destroy (&tmp_surface->base);
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return status;
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}
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- if (scaled_font->quality == CLEARTYPE_QUALITY) {
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+ if (use_subpixel_antialiasing) {
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/* For ClearType, we need a 4-channel mask. If we are compositing on
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* a surface with alpha, we need to compute the alpha channel of
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* the mask (we just copy the green channel). But for a destination
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* surface without alpha the alpha channel of the mask is ignored
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*/
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if (surface->format != CAIRO_FORMAT_RGB24)
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_compute_argb32_mask_alpha (tmp_surface);
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@@ -1460,17 +1463,17 @@ _cairo_win32_scaled_font_show_glyphs (vo
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/* For op == OVER, no-cleartype, a possible optimization here is to
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* draw onto an intermediate ARGB32 surface and alpha-blend that with the
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* destination
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*/
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_cairo_pattern_init_for_surface (&mask, mask_surface);
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cairo_surface_destroy (mask_surface);
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- if (scaled_font->quality == CLEARTYPE_QUALITY)
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+ if (use_subpixel_antialiasing)
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mask.base.has_component_alpha = TRUE;
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status = _cairo_surface_composite (op, pattern,
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&mask.base,
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&surface->base,
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source_x, source_y,
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0, 0,
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dest_x, dest_y,
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diff --git a/gfx/cairo/cairo/src/cairo-xlib-surface.c b/gfx/cairo/cairo/src/cairo-xlib-surface.c
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--- a/gfx/cairo/cairo/src/cairo-xlib-surface.c
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+++ b/gfx/cairo/cairo/src/cairo-xlib-surface.c
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@@ -3570,16 +3570,17 @@ typedef struct _cairo_xlib_font_glyphset
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GlyphSet glyphset;
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cairo_format_t format;
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XRenderPictFormat *xrender_format;
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cairo_xlib_font_glyphset_free_glyphs_t *pending_free_glyphs;
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} cairo_xlib_font_glyphset_info_t;
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typedef struct _cairo_xlib_surface_font_private {
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cairo_scaled_font_t *scaled_font;
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+ cairo_scaled_font_t *grayscale_font;
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cairo_xlib_hook_t close_display_hook;
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cairo_xlib_display_t *display;
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cairo_xlib_font_glyphset_info_t glyphset_info[NUM_GLYPHSETS];
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} cairo_xlib_surface_font_private_t;
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/* callback from CloseDisplay */
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static void
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_cairo_xlib_surface_remove_scaled_font (cairo_xlib_display_t *display,
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@@ -3599,16 +3600,20 @@ _cairo_xlib_surface_remove_scaled_font (
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_cairo_scaled_font_reset_cache (scaled_font);
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CAIRO_MUTEX_UNLOCK (scaled_font->mutex);
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if (font_private != NULL) {
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Display *dpy;
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int i;
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+ if (font_private->grayscale_font) {
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+ cairo_scaled_font_destroy (font_private->grayscale_font);
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+ }
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+
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dpy = _cairo_xlib_display_get_dpy (display);
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for (i = 0; i < NUM_GLYPHSETS; i++) {
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cairo_xlib_font_glyphset_info_t *glyphset_info;
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glyphset_info = &font_private->glyphset_info[i];
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if (glyphset_info->glyphset)
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XRenderFreeGlyphSet (dpy, glyphset_info->glyphset);
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@@ -3629,16 +3634,17 @@ _cairo_xlib_surface_font_init (Display
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cairo_status_t status;
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int i;
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font_private = malloc (sizeof (cairo_xlib_surface_font_private_t));
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if (unlikely (font_private == NULL))
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return _cairo_error (CAIRO_STATUS_NO_MEMORY);
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font_private->scaled_font = scaled_font;
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+ font_private->grayscale_font = NULL;
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status = _cairo_xlib_display_get (dpy, &font_private->display);
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if (unlikely (status)) {
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free (font_private);
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return status;
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}
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/* initialize and hook into the CloseDisplay callback */
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font_private->close_display_hook.func =
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@@ -3671,16 +3677,20 @@ _cairo_xlib_surface_scaled_font_fini (ca
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{
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cairo_xlib_surface_font_private_t *font_private;
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font_private = scaled_font->surface_private;
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if (font_private != NULL) {
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cairo_xlib_display_t *display;
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int i;
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+ if (font_private->grayscale_font) {
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+ cairo_scaled_font_destroy (font_private->grayscale_font);
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+ }
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+
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display = font_private->display;
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_cairo_xlib_remove_close_display_hook (display,
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&font_private->close_display_hook);
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for (i = 0; i < NUM_GLYPHSETS; i++) {
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cairo_xlib_font_glyphset_info_t *glyphset_info;
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glyphset_info = &font_private->glyphset_info[i];
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@@ -4417,16 +4427,62 @@ _cairo_xlib_surface_owns_font (cairo_xli
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(font_private != NULL && font_private->display != dst->display))
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{
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return FALSE;
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}
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return TRUE;
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}
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+/* Gets a grayscale version of scaled_font. The grayscale version is cached
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+ * in our surface_private data.
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+ */
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+static cairo_scaled_font_t *
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+_cairo_xlib_get_grayscale_font (cairo_xlib_surface_t *dst,
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+ cairo_scaled_font_t *scaled_font)
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+{
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+ cairo_xlib_surface_font_private_t *font_private = scaled_font->surface_private;
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+ cairo_bool_t needs_font;
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+
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+ if (font_private == NULL) {
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+ cairo_status_t status = _cairo_xlib_surface_font_init (dst->dpy, scaled_font);
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+ if (unlikely (status))
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+ return _cairo_scaled_font_create_in_error (status);
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+ font_private = scaled_font->surface_private;
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+ }
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+
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+ CAIRO_MUTEX_LOCK (scaled_font->mutex);
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+ needs_font = !font_private->grayscale_font;
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+ CAIRO_MUTEX_UNLOCK (scaled_font->mutex);
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+
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+ if (needs_font) {
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+ cairo_font_options_t options;
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+ cairo_scaled_font_t *new_font;
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+
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+ options = scaled_font->options;
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+ options.antialias = CAIRO_ANTIALIAS_GRAY;
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+ new_font = cairo_scaled_font_create (scaled_font->font_face,
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+ &scaled_font->font_matrix,
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+ &scaled_font->ctm, &options);
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+
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+ CAIRO_MUTEX_LOCK (scaled_font->mutex);
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+ if (!font_private->grayscale_font) {
|
|
+ font_private->grayscale_font = new_font;
|
|
+ new_font = NULL;
|
|
+ }
|
|
+ CAIRO_MUTEX_UNLOCK (scaled_font->mutex);
|
|
+
|
|
+ if (new_font) {
|
|
+ cairo_scaled_font_destroy (new_font);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return font_private->grayscale_font;
|
|
+}
|
|
+
|
|
static cairo_int_status_t
|
|
_cairo_xlib_surface_show_glyphs (void *abstract_dst,
|
|
cairo_operator_t op,
|
|
const cairo_pattern_t *src_pattern,
|
|
cairo_glyph_t *glyphs,
|
|
int num_glyphs,
|
|
cairo_scaled_font_t *scaled_font,
|
|
cairo_clip_t *clip,
|
|
@@ -4475,16 +4531,21 @@ _cairo_xlib_surface_show_glyphs (void
|
|
|
|
operation = _categorize_composite_operation (dst, op, src_pattern, TRUE);
|
|
if (operation == DO_UNSUPPORTED)
|
|
return UNSUPPORTED ("unsupported op");
|
|
|
|
if (! _cairo_xlib_surface_owns_font (dst, scaled_font))
|
|
return UNSUPPORTED ("unowned font");
|
|
|
|
+ if (!dst->base.permit_subpixel_antialiasing &&
|
|
+ scaled_font->options.antialias == CAIRO_ANTIALIAS_SUBPIXEL) {
|
|
+ scaled_font = _cairo_xlib_get_grayscale_font (dst, scaled_font);
|
|
+ }
|
|
+
|
|
X_DEBUG ((dst->dpy, "show_glyphs (dst=%x)", (unsigned int) dst->drawable));
|
|
|
|
if (clip_region != NULL &&
|
|
cairo_region_num_rectangles (clip_region) == 1)
|
|
{
|
|
cairo_rectangle_int_t glyph_extents;
|
|
const cairo_rectangle_int_t *clip_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
|
|
@@ -2101,16 +2101,35 @@ cairo_public void
|
|
cairo_surface_copy_page (cairo_surface_t *surface);
|
|
|
|
cairo_public void
|
|
cairo_surface_show_page (cairo_surface_t *surface);
|
|
|
|
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_format_t:
|
|
* @CAIRO_FORMAT_ARGB32: each pixel is a 32-bit quantity, with
|
|
* alpha in the upper 8 bits, then red, then green, then blue.
|
|
* The 32-bit quantities are stored native-endian. Pre-multiplied
|
|
* alpha is used. (That is, 50% transparent red is 0x80800000,
|
|
diff --git a/gfx/cairo/cairo/src/cairoint.h b/gfx/cairo/cairo/src/cairoint.h
|
|
--- a/gfx/cairo/cairo/src/cairoint.h
|
|
+++ b/gfx/cairo/cairo/src/cairoint.h
|
|
@@ -2750,16 +2750,18 @@ slim_hidden_proto (cairo_surface_destroy
|
|
slim_hidden_proto (cairo_surface_finish);
|
|
slim_hidden_proto (cairo_surface_flush);
|
|
slim_hidden_proto (cairo_surface_get_content);
|
|
slim_hidden_proto (cairo_surface_get_device_offset);
|
|
slim_hidden_proto (cairo_surface_get_font_options);
|
|
slim_hidden_proto (cairo_surface_get_mime_data);
|
|
slim_hidden_proto (cairo_surface_get_type);
|
|
slim_hidden_proto (cairo_surface_has_show_text_glyphs);
|
|
+slim_hidden_proto (cairo_surface_set_subpixel_antialiasing);
|
|
+slim_hidden_proto (cairo_surface_get_subpixel_antialiasing);
|
|
slim_hidden_proto (cairo_surface_mark_dirty_rectangle);
|
|
slim_hidden_proto_no_warn (cairo_surface_reference);
|
|
slim_hidden_proto (cairo_surface_set_device_offset);
|
|
slim_hidden_proto (cairo_surface_set_fallback_resolution);
|
|
slim_hidden_proto (cairo_surface_set_mime_data);
|
|
slim_hidden_proto (cairo_surface_show_page);
|
|
slim_hidden_proto (cairo_surface_status);
|
|
slim_hidden_proto (cairo_text_cluster_allocate);
|