void
gtk_theming_background_render (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkJunctionSides junction)
{
GtkThemingBackground bg;
gint idx;
GtkCssValue *background_image;
GtkCssValue *box_shadow;
const GdkRGBA *bg_color;
background_image = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BACKGROUND_IMAGE);
bg_color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BACKGROUND_COLOR));
box_shadow = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BOX_SHADOW);
/* This is the common default case of no background */
if (gtk_rgba_is_clear (bg_color) &&
_gtk_css_array_value_get_n_values (background_image) == 1 &&
_gtk_css_image_value_get_image (_gtk_css_array_value_get_nth (background_image, 0)) == NULL &&
_gtk_css_shadows_value_is_none (box_shadow))
return;
bg.context = context;
_gtk_theming_background_init_context (&bg, width, height, junction);
cairo_save (cr);
cairo_translate (cr, x, y);
/* Outset shadows */
_gtk_css_shadows_value_paint_box (box_shadow,
cr,
&bg.boxes[GTK_CSS_AREA_BORDER_BOX],
FALSE);
_gtk_theming_background_paint_color (&bg, cr, bg_color, background_image);
for (idx = _gtk_css_array_value_get_n_values (background_image) - 1; idx >= 0; idx--)
{
_gtk_theming_background_paint_layer (&bg, idx, cr);
}
/* Inset shadows */
_gtk_css_shadows_value_paint_box (box_shadow,
cr,
&bg.boxes[GTK_CSS_AREA_PADDING_BOX],
TRUE);
cairo_restore (cr);
}
/*
* gtk_render_content_path:
* @context: style context to get style information from
* @cr: cairo context to add path to
* @x: x coordinate of CSS box
* @y: y coordinate of CSS box
* @width: width of CSS box
* @height: height of CSS box
*
* Adds the path of the content box to @cr for a given border box.
* This function respects rounded corners.
*
* This is useful if you are drawing content that is supposed to
* fill the whole content area, like the color buttons in
* #GtkColorChooserDialog.
**/
void
gtk_render_content_path (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
GtkRoundedBox box;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
_gtk_rounded_box_init_rect (&box, x, y, width, height);
_gtk_rounded_box_apply_border_radius_for_style (&box, gtk_style_context_lookup_style (context), 0);
_gtk_rounded_box_shrink (&box,
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_TOP), 100),
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_RIGHT), 100),
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_BOTTOM), 100),
_gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH), 100)
+ _gtk_css_number_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_PADDING_LEFT), 100));
_gtk_rounded_box_path (&box, cr);
}
static void
gtk_do_render_line (GtkStyleContext *context,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1)
{
const GdkRGBA *color;
cairo_save (cr);
color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_width (cr, 1);
cairo_move_to (cr, x0 + 0.5, y0 + 0.5);
cairo_line_to (cr, x1 + 0.5, y1 + 0.5);
gdk_cairo_set_source_rgba (cr, color);
cairo_stroke (cr);
cairo_restore (cr);
}
void
_gtk_theming_background_render (GtkThemingBackground *bg,
cairo_t *cr)
{
gint idx;
GtkThemingBackgroundLayer layer;
GtkCssValue *background_image;
background_image = _gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_IMAGE);
cairo_save (cr);
cairo_translate (cr, bg->paint_area.x, bg->paint_area.y);
_gtk_theming_background_paint_color (bg, cr, background_image);
for (idx = _gtk_css_array_value_get_n_values (background_image) - 1; idx >= 0; idx--)
{
_gtk_theming_background_init_layer (bg, &layer, background_image, idx);
_gtk_theming_background_paint_layer (bg, &layer, cr);
}
_gtk_theming_background_apply_shadow (bg, cr);
cairo_restore (cr);
}
static void
_gtk_theming_background_apply_shadow (GtkThemingBackground *bg,
cairo_t *cr)
{
_gtk_css_shadows_value_paint_box (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BOX_SHADOW),
cr,
&bg->padding_box);
}
static void
_gtk_theming_background_layer_apply_clip (GtkThemingBackground *bg,
GtkThemingBackgroundLayer *layer)
{
GtkCssValue *value = _gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_CLIP);
GtkCssArea clip = _gtk_css_area_value_get (_gtk_css_array_value_get_nth (value, layer->idx));
_gtk_theming_background_apply_clip (bg, &layer->clip_box, clip);
}
gboolean
_gtk_theming_background_has_background_image (GtkThemingBackground *bg)
{
GtkCssImage *image;
GtkCssValue *value = _gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_IMAGE);
if (_gtk_css_array_value_get_n_values (value) == 0)
return FALSE;
image = _gtk_css_image_value_get_image (_gtk_css_array_value_get_nth (value, 0));
return (image != NULL);
}
/**
* gtk_snapshot_render_layout:
* @snapshot: a #GtkSnapshot
* @context: the #GtkStyleContext to use
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @layout: the #PangoLayout to render
*
* Creates a render node for rendering @layout according to the style
* information in @context, and appends it to the current node of @snapshot,
* without changing the current node.
*
* Since: 3.90
*/
void
gtk_snapshot_render_layout (GtkSnapshot *snapshot,
GtkStyleContext *context,
gdouble x,
gdouble y,
PangoLayout *layout)
{
const GdkRGBA *fg_color;
graphene_rect_t bounds;
GtkBorder shadow_extents;
PangoRectangle ink_rect;
GtkCssValue *shadow;
cairo_t *cr;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
fg_color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
shadow = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_TEXT_SHADOW);
pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
_gtk_css_shadows_value_get_extents (shadow, &shadow_extents);
graphene_rect_init (&bounds,
ink_rect.x - shadow_extents.left,
ink_rect.y - shadow_extents.top,
ink_rect.width + shadow_extents.left + shadow_extents.right,
ink_rect.height + shadow_extents.top + shadow_extents.bottom);
gtk_snapshot_translate_2d (snapshot, x, y);
cr = gtk_snapshot_append_cairo_node (snapshot, &bounds, "Text<%dchars>", pango_layout_get_character_count (layout));
_gtk_css_shadows_value_paint_layout (shadow, cr, layout);
gdk_cairo_set_source_rgba (cr, fg_color);
pango_cairo_show_layout (cr, layout);
cairo_destroy (cr);
gtk_snapshot_translate_2d (snapshot, -x, -y);
}
static void
gtk_do_render_layout (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
const GdkRGBA *fg_color;
cairo_save (cr);
fg_color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
prepare_context_for_layout (cr, x, y, layout);
_gtk_css_shadows_value_paint_layout (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_TEXT_SHADOW),
cr, layout);
gdk_cairo_set_source_rgba (cr, fg_color);
pango_cairo_show_layout (cr, layout);
cairo_restore (cr);
}
static void
_gtk_theming_background_paint_color (GtkThemingBackground *bg,
cairo_t *cr,
const GdkRGBA *bg_color,
GtkCssValue *background_image)
{
gint n_values = _gtk_css_array_value_get_n_values (background_image);
GtkCssArea clip = _gtk_css_area_value_get
(_gtk_css_array_value_get_nth
(_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_CLIP),
n_values - 1));
_gtk_rounded_box_path (&bg->boxes[clip], cr);
gdk_cairo_set_source_rgba (cr, bg_color);
cairo_fill (cr);
}
/**
* gtk_render_background_get_clip:
* @context: a #GtkStyleContext
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
* @out_clip: (out): return location for the clip
*
* Returns the area that will be affected (i.e. drawn to) when
* calling gtk_render_background() for the given @context and
* rectangle.
*
* Since: 3.20
*/
void
gtk_render_background_get_clip (GtkStyleContext *context,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GdkRectangle *out_clip)
{
GtkBorder shadow;
_gtk_css_shadows_value_get_extents (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BOX_SHADOW), &shadow);
out_clip->x = floor (x) - shadow.left;
out_clip->y = floor (y) - shadow.top;
out_clip->width = ceil (width) + shadow.left + shadow.right;
out_clip->height = ceil (height) + shadow.top + shadow.bottom;
}
/**
* gtk_render_icon_pixbuf:
* @context: a #GtkStyleContext
* @source: the #GtkIconSource specifying the icon to render
* @size: (type int): the size (#GtkIconSize) to render the icon at.
* A size of `(GtkIconSize) -1` means render at the size of the source
* and don’t scale.
*
* Renders the icon specified by @source at the given @size, returning the result
* in a pixbuf.
*
* Returns: (transfer full): a newly-created #GdkPixbuf containing the rendered icon
*
* Since: 3.0
*
* Deprecated: 3.10: Use gtk_icon_theme_load_icon() instead.
**/
GdkPixbuf *
gtk_render_icon_pixbuf (GtkStyleContext *context,
const GtkIconSource *source,
GtkIconSize size)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
g_return_val_if_fail (size > GTK_ICON_SIZE_INVALID || size == (GtkIconSize)-1, NULL);
g_return_val_if_fail (source != NULL, NULL);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
return gtk_render_icon_pixbuf_unpacked (gtk_icon_source_get_pixbuf (source),
gtk_icon_source_get_size_wildcarded (source) ? size : -1,
gtk_icon_source_get_state_wildcarded (source)
? _gtk_css_icon_effect_value_get (
_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ICON_EFFECT))
: GTK_CSS_ICON_EFFECT_NONE);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
static GtkIconLookupFlags
get_icon_lookup_flags (GtkIconHelper *self, GtkStyleContext *context)
{
GtkIconLookupFlags flags;
GtkCssIconStyle icon_style;
GtkStateFlags state;
state = gtk_style_context_get_state (context);
flags = GTK_ICON_LOOKUP_USE_BUILTIN;
if (self->priv->use_fallback)
flags |= GTK_ICON_LOOKUP_GENERIC_FALLBACK;
if (self->priv->pixel_size != -1 || self->priv->force_scale_pixbuf)
flags |= GTK_ICON_LOOKUP_FORCE_SIZE;
icon_style = _gtk_css_icon_style_value_get (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ICON_STYLE));
switch (icon_style)
{
case GTK_CSS_ICON_STYLE_REGULAR:
flags |= GTK_ICON_LOOKUP_FORCE_REGULAR;
break;
case GTK_CSS_ICON_STYLE_SYMBOLIC:
flags |= GTK_ICON_LOOKUP_FORCE_SYMBOLIC;
break;
case GTK_CSS_ICON_STYLE_REQUESTED:
break;
default:
g_assert_not_reached ();
return 0;
}
if (state & GTK_STATE_FLAG_DIR_LTR)
flags |= GTK_ICON_LOOKUP_DIR_LTR;
else if (state & GTK_STATE_FLAG_DIR_RTL)
flags |= GTK_ICON_LOOKUP_DIR_RTL;
return flags;
}
static void
_gtk_theming_background_layer_apply_origin (GtkThemingBackground *bg,
GtkThemingBackgroundLayer *layer)
{
cairo_rectangle_t image_rect;
GtkCssValue *value = _gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_ORIGIN);
GtkCssArea origin = _gtk_css_area_value_get (_gtk_css_array_value_get_nth (value, layer->idx));
/* The default size of the background image depends on the
background-origin value as this affects the top left
and the bottom right corners. */
switch (origin) {
case GTK_CSS_AREA_BORDER_BOX:
image_rect.x = 0;
image_rect.y = 0;
image_rect.width = bg->paint_area.width;
image_rect.height = bg->paint_area.height;
break;
case GTK_CSS_AREA_CONTENT_BOX:
image_rect.x = bg->border.left + bg->padding.left;
image_rect.y = bg->border.top + bg->padding.top;
image_rect.width = bg->paint_area.width - bg->border.left - bg->border.right - bg->padding.left - bg->padding.right;
image_rect.height = bg->paint_area.height - bg->border.top - bg->border.bottom - bg->padding.top - bg->padding.bottom;
break;
case GTK_CSS_AREA_PADDING_BOX:
default:
image_rect.x = bg->border.left;
image_rect.y = bg->border.top;
image_rect.width = bg->paint_area.width - bg->border.left - bg->border.right;
image_rect.height = bg->paint_area.height - bg->border.top - bg->border.bottom;
break;
}
/* XXX: image_rect might have negative width/height here.
* Do we need to do something about it? */
layer->image_rect = image_rect;
}
static void
_gtk_theming_background_paint_color (GtkThemingBackground *bg,
cairo_t *cr,
GtkCssValue *background_image)
{
GtkRoundedBox clip_box;
gint n_values = _gtk_css_array_value_get_n_values (background_image);
GtkCssArea clip = _gtk_css_area_value_get
(_gtk_css_array_value_get_nth
(_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_CLIP),
n_values - 1));
clip_box = bg->border_box;
_gtk_theming_background_apply_clip (bg, &clip_box, clip);
cairo_save (cr);
_gtk_rounded_box_path (&clip_box, cr);
cairo_clip (cr);
gdk_cairo_set_source_rgba (cr, &bg->bg_color);
cairo_paint (cr);
cairo_restore (cr);
}
static void
_gtk_theming_background_paint_layer (GtkThemingBackground *bg,
guint idx,
cairo_t *cr)
{
GtkCssRepeatStyle hrepeat, vrepeat;
const GtkCssValue *pos, *repeat;
GtkCssImage *image;
const GtkRoundedBox *origin;
double image_width, image_height;
double width, height;
pos = _gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_POSITION), idx);
repeat = _gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_REPEAT), idx);
hrepeat = _gtk_css_background_repeat_value_get_x (repeat);
vrepeat = _gtk_css_background_repeat_value_get_y (repeat);
image = _gtk_css_image_value_get_image (
_gtk_css_array_value_get_nth (
_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_IMAGE),
idx));
origin = &bg->boxes[
_gtk_css_area_value_get (
_gtk_css_array_value_get_nth (
_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_ORIGIN),
idx))];
width = origin->box.width;
height = origin->box.height;
if (image == NULL || width <= 0 || height <= 0)
return;
_gtk_css_bg_size_value_compute_size (_gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_SIZE), idx),
image,
width,
height,
&image_width,
&image_height);
if (image_width <= 0 || image_height <= 0)
return;
/* optimization */
if (image_width == width)
hrepeat = GTK_CSS_REPEAT_STYLE_NO_REPEAT;
if (image_height == height)
vrepeat = GTK_CSS_REPEAT_STYLE_NO_REPEAT;
cairo_save (cr);
_gtk_rounded_box_path (
&bg->boxes[
_gtk_css_area_value_get (
_gtk_css_array_value_get_nth (
_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_CLIP),
idx))],
cr);
cairo_clip (cr);
cairo_translate (cr, origin->box.x, origin->box.y);
if (hrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT && vrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
{
cairo_translate (cr,
_gtk_css_position_value_get_x (pos, width - image_width),
_gtk_css_position_value_get_y (pos, height - image_height));
/* shortcut for normal case */
_gtk_css_image_draw (image, cr, image_width, image_height);
}
else
{
int surface_width, surface_height;
cairo_rectangle_t fill_rect;
cairo_surface_t *surface;
cairo_t *cr2;
/* If ‘background-repeat’ is ‘round’ for one (or both) dimensions,
* there is a second step. The UA must scale the image in that
* dimension (or both dimensions) so that it fits a whole number of
* times in the background positioning area. In the case of the width
* (height is analogous):
*
* If X ≠ 0 is the width of the image after step one and W is the width
* of the background positioning area, then the rounded width
* X' = W / round(W / X) where round() is a function that returns the
* nearest natural number (integer greater than zero).
*
* If ‘background-repeat’ is ‘round’ for one dimension only and if
* ‘background-size’ is ‘auto’ for the other dimension, then there is
* a third step: that other dimension is scaled so that the original
* aspect ratio is restored.
*/
if (hrepeat == GTK_CSS_REPEAT_STYLE_ROUND)
{
double n = round (width / image_width);
n = MAX (1, n);
if (vrepeat != GTK_CSS_REPEAT_STYLE_ROUND
/* && vsize == auto (it is by default) */)
image_height *= width / (image_width * n);
image_width = width / n;
}
if (vrepeat == GTK_CSS_REPEAT_STYLE_ROUND)
{
double n = round (height / image_height);
n = MAX (1, n);
if (hrepeat != GTK_CSS_REPEAT_STYLE_ROUND
/* && hsize == auto (it is by default) */)
image_width *= height / (image_height * n);
image_height = height / n;
}
/* if hrepeat or vrepeat is 'space', we create a somewhat larger surface
* to store the extra space. */
if (hrepeat == GTK_CSS_REPEAT_STYLE_SPACE)
{
double n = floor (width / image_width);
surface_width = n ? round (width / n) : 0;
}
else
surface_width = round (image_width);
if (vrepeat == GTK_CSS_REPEAT_STYLE_SPACE)
{
double n = floor (height / image_height);
surface_height = n ? round (height / n) : 0;
}
else
surface_height = round (image_height);
surface = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
surface_width, surface_height);
cr2 = cairo_create (surface);
cairo_translate (cr2,
0.5 * (surface_width - image_width),
0.5 * (surface_height - image_height));
_gtk_css_image_draw (image, cr2, image_width, image_height);
cairo_destroy (cr2);
cairo_set_source_surface (cr, surface,
_gtk_css_position_value_get_x (pos, width - image_width),
_gtk_css_position_value_get_y (pos, height - image_height));
cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
cairo_surface_destroy (surface);
if (hrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
{
fill_rect.x = _gtk_css_position_value_get_x (pos, width - image_width);
fill_rect.width = image_width;
}
else
{
fill_rect.x = 0;
fill_rect.width = width;
}
if (vrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
{
fill_rect.y = _gtk_css_position_value_get_y (pos, height - image_height);
fill_rect.height = image_height;
}
else
{
fill_rect.y = 0;
fill_rect.height = height;
}
cairo_rectangle (cr, fill_rect.x, fill_rect.y,
fill_rect.width, fill_rect.height);
cairo_fill (cr);
}
cairo_restore (cr);
}
