[gtk+] textview: Make the PangoRenderer use Cairo exclusively
- From: Benjamin Otte <otte src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+] textview: Make the PangoRenderer use Cairo exclusively
- Date: Tue, 10 Aug 2010 19:17:04 +0000 (UTC)
commit fea39c078b8cc636684b9adaf4a42fadf149565e
Author: Benjamin Otte <otte redhat com>
Date: Thu Jul 22 01:17:01 2010 +0200
textview: Make the PangoRenderer use Cairo exclusively
No more gdkpango usage, no more GdkGC required, yay!
gtk/gtktextdisplay.c | 338 ++++++++++++++++++++++++++++++-------------------
1 files changed, 207 insertions(+), 131 deletions(-)
---
diff --git a/gtk/gtktextdisplay.c b/gtk/gtktextdisplay.c
index b50e757..ac41da9 100644
--- a/gtk/gtktextdisplay.c
+++ b/gtk/gtktextdisplay.c
@@ -100,13 +100,10 @@ enum {
struct _GtkTextRenderer
{
- GdkPangoRenderer parent_instance;
-
- GdkScreen *screen;
+ PangoRenderer parent_instance;
GtkWidget *widget;
- GdkDrawable *drawable;
- GdkRectangle clip_rect;
+ cairo_t *cr;
GdkColor *error_color; /* Error underline color for this widget */
GList *widgets; /* widgets encountered when drawing */
@@ -116,10 +113,10 @@ struct _GtkTextRenderer
struct _GtkTextRendererClass
{
- GdkPangoRendererClass parent_class;
+ PangoRendererClass parent_class;
};
-G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, GDK_TYPE_PANGO_RENDERER)
+G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, PANGO_TYPE_RENDERER)
static GdkColor *
text_renderer_get_error_color (GtkTextRenderer *text_renderer)
@@ -182,7 +179,6 @@ gtk_text_renderer_prepare_run (PangoRenderer *renderer,
PangoLayoutRun *run)
{
GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
- GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
GdkColor *bg_color, *fg_color, *underline_color;
GtkTextAppearance *appearance;
@@ -222,6 +218,134 @@ gtk_text_renderer_prepare_run (PangoRenderer *renderer,
}
static void
+set_color (GtkTextRenderer *text_renderer,
+ PangoRenderPart part)
+{
+ PangoColor *color;
+
+ cairo_save (text_renderer->cr);
+
+ color = pango_renderer_get_color (PANGO_RENDERER (text_renderer), part);
+ if (color)
+ cairo_set_source_rgb (text_renderer->cr,
+ color->red / 65535.,
+ color->green / 65535.,
+ color->blue / 65535.);
+}
+
+static void
+unset_color (GtkTextRenderer *text_renderer)
+{
+ cairo_restore (text_renderer->cr);
+}
+
+static void
+gtk_text_renderer_draw_glyphs (PangoRenderer *renderer,
+ PangoFont *font,
+ PangoGlyphString *glyphs,
+ int x,
+ int y)
+{
+ GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
+
+ set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
+
+ cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
+ pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs);
+
+ unset_color (text_renderer);
+}
+
+static void
+gtk_text_renderer_draw_glyph_item (PangoRenderer *renderer,
+ const char *text,
+ PangoGlyphItem *glyph_item,
+ int x,
+ int y)
+{
+ GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
+
+ set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
+
+ cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
+ pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item);
+
+ unset_color (text_renderer);
+}
+
+static void
+gtk_text_renderer_draw_rectangle (PangoRenderer *renderer,
+ PangoRenderPart part,
+ int x,
+ int y,
+ int width,
+ int height)
+{
+ GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
+
+ set_color (text_renderer, part);
+
+ cairo_rectangle (text_renderer->cr,
+ (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+ (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+ cairo_fill (text_renderer->cr);
+
+ unset_color (text_renderer);
+}
+
+static void
+gtk_text_renderer_draw_trapezoid (PangoRenderer *renderer,
+ PangoRenderPart part,
+ double y1_,
+ double x11,
+ double x21,
+ double y2,
+ double x12,
+ double x22)
+{
+ GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
+ cairo_t *cr;
+ cairo_matrix_t matrix;
+
+ set_color (text_renderer, part);
+
+ cr = text_renderer->cr;
+
+ cairo_get_matrix (cr, &matrix);
+ matrix.xx = matrix.yy = 1.0;
+ matrix.xy = matrix.yx = 0.0;
+ cairo_set_matrix (cr, &matrix);
+
+ cairo_move_to (cr, x11, y1_);
+ cairo_line_to (cr, x21, y1_);
+ cairo_line_to (cr, x22, y2);
+ cairo_line_to (cr, x12, y2);
+ cairo_close_path (cr);
+
+ cairo_fill (cr);
+
+ unset_color (text_renderer);
+}
+
+static void
+gtk_text_renderer_draw_error_underline (PangoRenderer *renderer,
+ int x,
+ int y,
+ int width,
+ int height)
+{
+ GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
+
+ set_color (text_renderer, PANGO_RENDER_PART_UNDERLINE);
+
+ pango_cairo_show_error_underline (text_renderer->cr,
+ (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+ (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+
+ unset_color (text_renderer);
+}
+
+static void
gtk_text_renderer_draw_shape (PangoRenderer *renderer,
PangoAttrShape *attr,
int x,
@@ -247,40 +371,40 @@ gtk_text_renderer_draw_shape (PangoRenderer *renderer,
/* This happens if we have an empty widget anchor. Draw
* something empty-looking.
*/
- GdkRectangle shape_rect, draw_rect;
+ GdkRectangle shape_rect;
+ cairo_t *cr;
shape_rect.x = PANGO_PIXELS (x);
shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y);
shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x;
shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y;
- if (gdk_rectangle_intersect (&shape_rect, &text_renderer->clip_rect,
- &draw_rect))
- {
- cairo_t *cr = gdk_cairo_create (text_renderer->drawable);
-
- cairo_set_line_width (cr, 1.0);
- gdk_cairo_set_source_color (cr, fg);
-
- cairo_rectangle (cr,
- shape_rect.x + 0.5, shape_rect.y + 0.5,
- shape_rect.width - 1, shape_rect.height - 1);
- cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5);
- cairo_line_to (cr,
- shape_rect.x + shape_rect.width - 0.5,
- shape_rect.y + shape_rect.height - 0.5);
- cairo_move_to (cr, shape_rect.x + 0.5,
- shape_rect.y + shape_rect.height - 0.5);
- cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5,
- shape_rect.y + 0.5);
-
- cairo_stroke (cr);
-
- cairo_destroy (cr);
- }
+ cr = text_renderer->cr;
+
+ cairo_save (cr);
+
+ cairo_set_line_width (cr, 1.0);
+ gdk_cairo_set_source_color (cr, fg);
+
+ cairo_rectangle (cr,
+ shape_rect.x + 0.5, shape_rect.y + 0.5,
+ shape_rect.width - 1, shape_rect.height - 1);
+ cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5);
+ cairo_line_to (cr,
+ shape_rect.x + shape_rect.width - 0.5,
+ shape_rect.y + shape_rect.height - 0.5);
+ cairo_move_to (cr, shape_rect.x + 0.5,
+ shape_rect.y + shape_rect.height - 0.5);
+ cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5,
+ shape_rect.y + 0.5);
+
+ cairo_stroke (cr);
+
+ cairo_restore (cr);
}
else if (GDK_IS_PIXBUF (attr->data))
{
+ cairo_t *cr = text_renderer->cr;
gint width, height;
GdkRectangle pixbuf_rect, draw_rect;
GdkPixbuf *pixbuf;
@@ -295,17 +419,13 @@ gtk_text_renderer_draw_shape (PangoRenderer *renderer,
pixbuf_rect.width = width;
pixbuf_rect.height = height;
- if (gdk_rectangle_intersect (&pixbuf_rect, &text_renderer->clip_rect,
- &draw_rect))
- {
- cairo_t *cr = gdk_cairo_create (text_renderer->drawable);
+ cairo_save (cr);
- gdk_cairo_set_source_pixbuf (cr, pixbuf, pixbuf_rect.x, pixbuf_rect.y);
- gdk_cairo_rectangle (cr, &draw_rect);
- cairo_fill (cr);
+ gdk_cairo_set_source_pixbuf (cr, pixbuf, pixbuf_rect.x, pixbuf_rect.y);
+ gdk_cairo_rectangle (cr, &draw_rect);
+ cairo_fill (cr);
- cairo_destroy (cr);
- }
+ cairo_restore (cr);
}
else if (GTK_IS_WIDGET (attr->data))
{
@@ -339,6 +459,11 @@ _gtk_text_renderer_class_init (GtkTextRendererClass *klass)
PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
renderer_class->prepare_run = gtk_text_renderer_prepare_run;
+ renderer_class->draw_glyphs = gtk_text_renderer_draw_glyphs;
+ renderer_class->draw_glyph_item = gtk_text_renderer_draw_glyph_item;
+ renderer_class->draw_rectangle = gtk_text_renderer_draw_rectangle;
+ renderer_class->draw_trapezoid = gtk_text_renderer_draw_trapezoid;
+ renderer_class->draw_error_underline = gtk_text_renderer_draw_error_underline;
renderer_class->draw_shape = gtk_text_renderer_draw_shape;
object_class->finalize = gtk_text_renderer_finalize;
@@ -353,17 +478,11 @@ text_renderer_set_state (GtkTextRenderer *text_renderer,
static void
text_renderer_begin (GtkTextRenderer *text_renderer,
- GtkWidget *widget,
- GdkDrawable *drawable,
- GdkRectangle *clip_rect)
+ GtkWidget *widget,
+ cairo_t *cr)
{
text_renderer->widget = widget;
- text_renderer->drawable = drawable;
- text_renderer->clip_rect = *clip_rect;
-
- gdk_pango_renderer_set_drawable (GDK_PANGO_RENDERER (text_renderer), drawable);
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer),
- widget->style->text_gc[widget->state]);
+ text_renderer->cr = cr;
}
/* Returns a GSList of (referenced) widgets encountered while drawing.
@@ -374,7 +493,7 @@ text_renderer_end (GtkTextRenderer *text_renderer)
GList *widgets = text_renderer->widgets;
text_renderer->widget = NULL;
- text_renderer->drawable = NULL;
+ text_renderer->cr = NULL;
text_renderer->widgets = NULL;
@@ -384,9 +503,6 @@ text_renderer_end (GtkTextRenderer *text_renderer)
text_renderer->error_color = NULL;
}
- gdk_pango_renderer_set_drawable (GDK_PANGO_RENDERER (text_renderer), NULL);
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), NULL);
-
return widgets;
}
@@ -404,7 +520,6 @@ get_selected_clip (GtkTextRenderer *text_renderer,
gint *ranges;
gint n_ranges, i;
cairo_region_t *clip_region = cairo_region_create ();
- cairo_region_t *tmp_region;
pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
@@ -420,10 +535,6 @@ get_selected_clip (GtkTextRenderer *text_renderer,
cairo_region_union_rectangle (clip_region, &rect);
}
- tmp_region = cairo_region_create_rectangle (&text_renderer->clip_rect);
- cairo_region_intersect (clip_region, tmp_region);
- cairo_region_destroy (tmp_region);
-
g_free (ranges);
return clip_region;
}
@@ -443,7 +554,6 @@ render_para (GtkTextRenderer *text_renderer,
PangoRectangle layout_logical;
int screen_width;
GdkColor *selection;
- GdkGC *fg_gc;
gint state;
gboolean first = TRUE;
@@ -465,7 +575,6 @@ render_para (GtkTextRenderer *text_renderer,
state = GTK_STATE_ACTIVE;
selection = &text_renderer->widget->style->base [state];
- fg_gc = text_renderer->widget->style->text_gc[text_renderer->widget->state];
do
{
@@ -507,13 +616,15 @@ render_para (GtkTextRenderer *text_renderer,
if (selection_start_index < byte_offset &&
selection_end_index > line->length + byte_offset) /* All selected */
{
- cairo_t *cr = gdk_cairo_create (text_renderer->drawable);
+ cairo_t *cr = text_renderer->cr;
+
+ cairo_save (cr);
gdk_cairo_set_source_color (cr, selection);
cairo_rectangle (cr,
x + line_display->left_margin, selection_y,
screen_width, selection_height);
cairo_fill (cr);
- cairo_destroy (cr);
+ cairo_restore(cr);
text_renderer_set_state (text_renderer, SELECTED);
pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
@@ -525,7 +636,9 @@ render_para (GtkTextRenderer *text_renderer,
{
if (line_display->pg_bg_color)
{
- cairo_t *cr = gdk_cairo_create (text_renderer->drawable);
+ cairo_t *cr = text_renderer->cr;
+
+ cairo_save (cr);
gdk_cairo_set_source_color (cr, line_display->pg_bg_color);
cairo_rectangle (cr,
@@ -533,7 +646,7 @@ render_para (GtkTextRenderer *text_renderer,
screen_width, selection_height);
cairo_fill (cr);
- cairo_destroy (cr);
+ cairo_restore (cr);
}
text_renderer_set_state (text_renderer, NORMAL);
@@ -550,16 +663,17 @@ render_para (GtkTextRenderer *text_renderer,
(selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) &&
selection_end_index > byte_offset)
{
- cairo_t *cr;
+ cairo_t *cr = text_renderer->cr;
cairo_region_t *clip_region = get_selected_clip (text_renderer, layout, line,
x + line_display->x_offset,
selection_y,
selection_height,
selection_start_index, selection_end_index);
- cr = gdk_cairo_create (text_renderer->drawable);
+ cairo_save (cr);
gdk_cairo_region (cr, clip_region);
cairo_clip (cr);
+ cairo_region_destroy (clip_region);
gdk_cairo_set_source_color (cr, selection);
cairo_rectangle (cr,
@@ -569,34 +683,20 @@ render_para (GtkTextRenderer *text_renderer,
selection_height);
cairo_fill (cr);
- cairo_destroy (cr);
-
- /* When we change the clip on the foreground GC, we have to set
- * it on the rendererer again, since the rendererer might have
- * copied the GC to change attributes.
- */
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), NULL);
- gdk_gc_set_clip_region (fg_gc, clip_region);
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), fg_gc);
-
text_renderer_set_state (text_renderer, SELECTED);
pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
line,
PANGO_SCALE * x + line_rect.x,
PANGO_SCALE * y + baseline);
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), NULL);
- gdk_gc_set_clip_region (fg_gc, NULL);
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), fg_gc);
-
- cairo_region_destroy (clip_region);
+ cairo_restore (cr);
/* Paint in the ends of the line */
if (line_rect.x > line_display->left_margin * PANGO_SCALE &&
((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
(line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
{
- cairo_t *cr = gdk_cairo_create (text_renderer->drawable);
+ cairo_save (cr);
gdk_cairo_set_source_color (cr, selection);
cairo_rectangle (cr,
@@ -605,7 +705,8 @@ render_para (GtkTextRenderer *text_renderer,
PANGO_PIXELS (line_rect.x) - line_display->left_margin,
selection_height);
cairo_fill (cr);
- cairo_destroy (cr);
+
+ cairo_restore (cr);
}
if (line_rect.x + line_rect.width <
@@ -613,13 +714,14 @@ render_para (GtkTextRenderer *text_renderer,
((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
(line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
{
- cairo_t *cr = gdk_cairo_create (text_renderer->drawable);
int nonlayout_width;
nonlayout_width =
line_display->left_margin + screen_width -
PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width);
+ cairo_save (cr);
+
gdk_cairo_set_source_color (cr, selection);
cairo_rectangle (cr,
x + PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
@@ -627,7 +729,8 @@ render_para (GtkTextRenderer *text_renderer,
nonlayout_width,
selection_height);
cairo_fill (cr);
- cairo_destroy (cr);
+
+ cairo_restore (cr);
}
}
else if (line_display->has_block_cursor &&
@@ -638,7 +741,7 @@ render_para (GtkTextRenderer *text_renderer,
{
GdkRectangle cursor_rect;
GdkColor cursor_color;
- cairo_t *cr;
+ cairo_t *cr = text_renderer->cr;
/* we draw text using base color on filled cursor rectangle of cursor color
* (normally white on black) */
@@ -649,24 +752,20 @@ render_para (GtkTextRenderer *text_renderer,
cursor_rect.width = line_display->block_cursor.width;
cursor_rect.height = line_display->block_cursor.height;
- cr = gdk_cairo_create (text_renderer->drawable);
+ cairo_save (cr);
+
gdk_cairo_rectangle (cr, &cursor_rect);
cairo_clip (cr);
gdk_cairo_set_source_color (cr, &cursor_color);
cairo_paint (cr);
- cairo_destroy (cr);
-
/* draw text under the cursor if any */
if (!line_display->cursor_at_line_end)
{
- GdkGC *cursor_text_gc;
+ gdk_cairo_set_source_color (cr,
+ &text_renderer->widget->style->base[text_renderer->widget->state]);
- cursor_text_gc = text_renderer->widget->style->base_gc[text_renderer->widget->state];
- gdk_gc_set_clip_rectangle (cursor_text_gc, &cursor_rect);
-
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), cursor_text_gc);
text_renderer_set_state (text_renderer, CURSOR);
pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
@@ -674,9 +773,9 @@ render_para (GtkTextRenderer *text_renderer,
PANGO_SCALE * x + line_rect.x,
PANGO_SCALE * y + baseline);
- gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), fg_gc);
- gdk_gc_set_clip_region (cursor_text_gc, NULL);
}
+
+ cairo_restore (cr);
}
}
@@ -687,37 +786,13 @@ render_para (GtkTextRenderer *text_renderer,
pango_layout_iter_free (iter);
}
-static void
-on_renderer_display_closed (GdkDisplay *display,
- gboolean is_error,
- GtkTextRenderer *text_renderer)
-{
- g_signal_handlers_disconnect_by_func (text_renderer->screen,
- (gpointer)on_renderer_display_closed,
- text_renderer);
- g_object_set_data (G_OBJECT (text_renderer->screen), I_("gtk-text-renderer"), NULL);
-}
-
static GtkTextRenderer *
-get_text_renderer (GdkScreen *screen)
+get_text_renderer (void)
{
- GtkTextRenderer *text_renderer;
+ static GtkTextRenderer *text_renderer = NULL;
- g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
-
- text_renderer = g_object_get_data (G_OBJECT (screen), "gtk-text-renderer");
if (!text_renderer)
- {
- text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, "screen", screen, NULL);
- text_renderer->screen = screen;
-
- g_object_set_data_full (G_OBJECT (screen), I_("gtk-text-renderer"), text_renderer,
- (GDestroyNotify)g_object_unref);
-
- g_signal_connect_object (gdk_screen_get_display (screen), "closed",
- G_CALLBACK (on_renderer_display_closed),
- text_renderer, 0);
- }
+ text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, NULL);
return text_renderer;
}
@@ -749,6 +824,7 @@ gtk_text_layout_draw (GtkTextLayout *layout,
GSList *line_list;
GSList *tmp_list;
GList *tmp_widgets;
+ cairo_t *cr;
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
g_return_if_fail (layout->default_style != NULL);
@@ -766,14 +842,14 @@ gtk_text_layout_draw (GtkTextLayout *layout,
if (line_list == NULL)
return; /* nothing on the screen */
- clip.x = x;
- clip.y = y;
- clip.width = width;
- clip.height = height;
+ cr = gdk_cairo_create (drawable);
+ cairo_rectangle (cr, x, y, width, height);
+ cairo_clip (cr);
- text_renderer = get_text_renderer (gdk_drawable_get_screen (drawable));
+ gdk_cairo_set_source_color (cr, &widget->style->text[widget->state]);
- text_renderer_begin (text_renderer, widget, drawable, &clip);
+ text_renderer = get_text_renderer ();
+ text_renderer_begin (text_renderer, widget, cr);
gtk_text_layout_wrap_loop_start (layout);
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