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snapshot: Add functions to append shadows

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This commit is contained in:
Benjamin Otte 2019-02-21 03:26:03 +01:00
parent 0d119f81c8
commit 1ef250f44a
4 changed files with 110 additions and 22 deletions
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2
docs/reference/gtk/gtk4-sections.txt
View File

@ -4412,6 +4412,8 @@ gtk_snapshot_append_layout
gtk_snapshot_append_linear_gradient
gtk_snapshot_append_repeating_linear_gradient
gtk_snapshot_append_border
gtk_snapshot_append_inset_shadow
gtk_snapshot_append_outset_shadow
gtk_snapshot_render_background
gtk_snapshot_render_frame
gtk_snapshot_render_focus

26
gtk/gtkcssshadowvalue.c
View File

@ -349,28 +349,19 @@ gtk_css_shadow_value_snapshot_outset (const GtkCssValue *shadow,
GtkSnapshot *snapshot,
const GskRoundedRect *border_box)
{
GskRoundedRect outline;
GskRenderNode *node;
int off_x, off_y;
g_return_if_fail (shadow->class == &GTK_CSS_VALUE_SHADOW);
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (_gtk_css_rgba_value_get_rgba (shadow->color)))
return;
gtk_snapshot_get_offset (snapshot, &off_x, &off_y);
gsk_rounded_rect_init_copy (&outline, border_box);
gsk_rounded_rect_offset (&outline, off_x, off_y);
node = gsk_outset_shadow_node_new (&outline,
gtk_snapshot_append_outset_shadow (snapshot,
border_box,
_gtk_css_rgba_value_get_rgba (shadow->color),
_gtk_css_number_value_get (shadow->hoffset, 0),
_gtk_css_number_value_get (shadow->voffset, 0),
_gtk_css_number_value_get (shadow->spread, 0),
_gtk_css_number_value_get (shadow->radius, 0));
gtk_snapshot_append_node_internal (snapshot, node);
gsk_render_node_unref (node);
}
void
@ -378,28 +369,19 @@ gtk_css_shadow_value_snapshot_inset (const GtkCssValue *shadow,
GtkSnapshot *snapshot,
const GskRoundedRect*padding_box)
{
GskRoundedRect outline;
GskRenderNode *node;
int off_x, off_y;
g_return_if_fail (shadow->class == &GTK_CSS_VALUE_SHADOW);
/* We don't need to draw invisible shadows */
if (gdk_rgba_is_clear (_gtk_css_rgba_value_get_rgba (shadow->color)))
return;
gtk_snapshot_get_offset (snapshot, &off_x, &off_y);
gsk_rounded_rect_init_copy (&outline, padding_box);
gsk_rounded_rect_offset (&outline, off_x, off_y);
node = gsk_inset_shadow_node_new (&outline,
gtk_snapshot_append_inset_shadow (snapshot,
padding_box,
_gtk_css_rgba_value_get_rgba (shadow->color),
_gtk_css_number_value_get (shadow->hoffset, 0),
_gtk_css_number_value_get (shadow->voffset, 0),
_gtk_css_number_value_get (shadow->spread, 0),
_gtk_css_number_value_get (shadow->radius, 0));
gtk_snapshot_append_node_internal (snapshot, node);
gsk_render_node_unref (node);
}
gboolean

88
gtk/gtksnapshot.c
View File

@ -1636,3 +1636,91 @@ gtk_snapshot_append_border (GtkSnapshot *snapshot,
gtk_snapshot_append_node_internal (snapshot, node);
gsk_render_node_unref (node);
}
/**
* gtk_snapshot_append_inset_shadow:
* @snapshot: a #GtkSnapshot
* @outline: outline of the region surrounded by shadow
* @color: color of the shadow
* @dx: horizontal offset of shadow
* @dy: vertical offset of shadow
* @spread: how far the shadow spreads towards the inside
* @blur_radius: how much blur to apply to the shadow
*
* Appends an inset shadow into the box given by @outline.
*/
void
gtk_snapshot_append_inset_shadow (GtkSnapshot *snapshot,
const GskRoundedRect *outline,
const GdkRGBA *color,
float dx,
float dy,
float spread,
float blur_radius)
{
GskRenderNode *node;
GskRoundedRect real_outline;
float scale_x, scale_y, x, y;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (outline != NULL);
g_return_if_fail (color != NULL);
gtk_snapshot_ensure_affine (snapshot, &scale_x, &scale_y, &x, &y);
gtk_rounded_rect_scale_affine (&real_outline, outline, scale_x, scale_y, x, y);
node = gsk_inset_shadow_node_new (&real_outline,
color,
scale_x * dx + x,
scale_y * dy + y,
spread,
blur_radius);
gtk_snapshot_append_node_internal (snapshot, node);
gsk_render_node_unref (node);
}
/**
* gtk_snapshot_append_outset_shadow:
* @snapshot: a #GtkSnapshot
* @outline: outline of the region surrounded by shadow
* @color: color of the shadow
* @dx: horizontal offset of shadow
* @dy: vertical offset of shadow
* @spread: how far the shadow spreads towards the outside
* @blur_radius: how much blur to apply to the shadow
*
* Appends an outset shadow node around the box given by @outline.
*/
void
gtk_snapshot_append_outset_shadow (GtkSnapshot *snapshot,
const GskRoundedRect *outline,
const GdkRGBA *color,
float dx,
float dy,
float spread,
float blur_radius)
{
GskRenderNode *node;
GskRoundedRect real_outline;
float scale_x, scale_y, x, y;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (outline != NULL);
g_return_if_fail (color != NULL);
gtk_snapshot_ensure_affine (snapshot, &scale_x, &scale_y, &x, &y);
gtk_rounded_rect_scale_affine (&real_outline, outline, scale_x, scale_y, x, y);
node = gsk_outset_shadow_node_new (&real_outline,
color,
scale_x * dx + x,
scale_y * dy + y,
spread,
blur_radius);
gtk_snapshot_append_node_internal (snapshot, node);
gsk_render_node_unref (node);
}

16
gtk/gtksnapshot.h
View File

@ -146,6 +146,22 @@ void gtk_snapshot_append_border (GtkSnapshot
const GskRoundedRect *outline,
const float border_width[4],
const GdkRGBA border_color[4]);
GDK_AVAILABLE_IN_ALL
void gtk_snapshot_append_inset_shadow (GtkSnapshot *snapshot,
const GskRoundedRect *outline,
const GdkRGBA *color,
float dx,
float dy,
float spread,
float blur_radius);
GDK_AVAILABLE_IN_ALL
void gtk_snapshot_append_outset_shadow (GtkSnapshot *snapshot,
const GskRoundedRect *outline,
const GdkRGBA *color,
float dx,
float dy,
float spread,
float blur_radius);
/* next function implemented in gskpango.c */
GDK_AVAILABLE_IN_ALL
void gtk_snapshot_append_layout (GtkSnapshot *snapshot,