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render: Make gtk_render_background() use the snapshot API

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This removes a lot of duplicated code.
This commit is contained in:
Benjamin Otte 2018-07-14 21:53:29 +02:00
parent 2a11baf6ea
commit 14408b7485
7 changed files with 14 additions and 752 deletions
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17
gtk/gtkcssshadowsvalue.c
View File

@ -301,23 +301,6 @@ _gtk_css_shadows_value_paint_icon (const GtkCssValue *shadows,
}
}
void
_gtk_css_shadows_value_paint_box (const GtkCssValue *shadows,
cairo_t *cr,
const GskRoundedRect*padding_box,
gboolean inset)
{
guint i;
g_return_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS);
for (i = 0; i < shadows->len; i++)
{
if (inset == _gtk_css_shadow_value_get_inset (shadows->values[i]))
_gtk_css_shadow_value_paint_box (shadows->values[i], cr, padding_box);
}
}
void
gtk_css_shadows_value_snapshot_outset (const GtkCssValue *shadows,
GtkSnapshot *snapshot,

4
gtk/gtkcssshadowsvalueprivate.h
View File

@ -44,10 +44,6 @@ void gtk_css_shadows_value_get_shadows (const GtkCssValue *
void _gtk_css_shadows_value_paint_icon (const GtkCssValue *shadows,
cairo_t *cr);
void _gtk_css_shadows_value_paint_box (const GtkCssValue *shadows,
cairo_t *cr,
const GskRoundedRect *padding_box,
gboolean inset);
void gtk_css_shadows_value_snapshot_outset (const GtkCssValue *shadows,
GtkSnapshot *snapshot,
const GskRoundedRect *border_box);

398
gtk/gtkcssshadowvalue.c
View File

@ -495,404 +495,6 @@ gtk_css_shadow_value_get_shadow (const GtkCssValue *value,
shadow->radius = _gtk_css_number_value_get (value->radius, 0);
}
static gboolean
has_empty_clip (cairo_t *cr)
{
double x1, y1, x2, y2;
cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
return x1 == x2 && y1 == y2;
}
static void
draw_shadow (const GtkCssValue *shadow,
cairo_t *cr,
GskRoundedRect *box,
GskRoundedRect *clip_box,
GskBlurFlags blur_flags)
{
cairo_t *shadow_cr;
gboolean do_blur;
if (has_empty_clip (cr))
return;
gdk_cairo_set_source_rgba (cr, _gtk_css_rgba_value_get_rgba (shadow->color));
do_blur = (blur_flags & (GSK_BLUR_X | GSK_BLUR_Y)) != 0;
if (do_blur)
shadow_cr = gtk_css_shadow_value_start_drawing (shadow, cr, blur_flags);
else
shadow_cr = cr;
cairo_set_fill_rule (shadow_cr, CAIRO_FILL_RULE_EVEN_ODD);
gsk_rounded_rect_path (box, shadow_cr);
if (shadow->inset)
_gtk_rounded_box_clip_path (clip_box, shadow_cr);
cairo_fill (shadow_cr);
if (do_blur)
gtk_css_shadow_value_finish_drawing (shadow, shadow_cr, blur_flags);
}
typedef struct {
double radius;
graphene_size_t corner;
} CornerMask;
static guint
corner_mask_hash (CornerMask *mask)
{
return ((guint)mask->radius << 24) ^
((guint)(mask->corner.width*4)) << 12 ^
((guint)(mask->corner.height*4)) << 0;
}
static gboolean
corner_mask_equal (CornerMask *mask1,
CornerMask *mask2)
{
return
mask1->radius == mask2->radius &&
mask1->corner.width == mask2->corner.width &&
mask1->corner.height == mask2->corner.height;
}
static void
draw_shadow_corner (const GtkCssValue *shadow,
cairo_t *cr,
GskRoundedRect *box,
GskRoundedRect *clip_box,
GskCorner corner,
cairo_rectangle_int_t *drawn_rect)
{
gdouble radius, clip_radius;
int x1, x2, x3, y1, y2, y3, x, y;
GskRoundedRect corner_box;
cairo_t *mask_cr;
cairo_surface_t *mask;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
double sx, sy;
static GHashTable *corner_mask_cache = NULL;
double max_other;
CornerMask key;
gboolean overlapped;
radius = _gtk_css_number_value_get (shadow->radius, 0);
clip_radius = gsk_cairo_blur_compute_pixels (radius);
overlapped = FALSE;
if (corner == GSK_CORNER_TOP_LEFT || corner == GSK_CORNER_BOTTOM_LEFT)
{
x1 = floor (box->bounds.origin.x - clip_radius);
x2 = ceil (box->bounds.origin.x + box->corner[corner].width + clip_radius);
x = x1;
sx = 1;
max_other = MAX(box->corner[GSK_CORNER_TOP_RIGHT].width, box->corner[GSK_CORNER_BOTTOM_RIGHT].width);
x3 = floor (box->bounds.origin.x + box->bounds.size.width - max_other - clip_radius);
if (x2 > x3)
overlapped = TRUE;
}
else
{
x1 = floor (box->bounds.origin.x + box->bounds.size.width - box->corner[corner].width - clip_radius);
x2 = ceil (box->bounds.origin.x + box->bounds.size.width + clip_radius);
x = x2;
sx = -1;
max_other = MAX(box->corner[GSK_CORNER_TOP_LEFT].width, box->corner[GSK_CORNER_BOTTOM_LEFT].width);
x3 = ceil (box->bounds.origin.x + max_other + clip_radius);
if (x3 > x1)
overlapped = TRUE;
}
if (corner == GSK_CORNER_TOP_LEFT || corner == GSK_CORNER_TOP_RIGHT)
{
y1 = floor (box->bounds.origin.y - clip_radius);
y2 = ceil (box->bounds.origin.y + box->corner[corner].height + clip_radius);
y = y1;
sy = 1;
max_other = MAX(box->corner[GSK_CORNER_BOTTOM_LEFT].height, box->corner[GSK_CORNER_BOTTOM_RIGHT].height);
y3 = floor (box->bounds.origin.y + box->bounds.size.height - max_other - clip_radius);
if (y2 > y3)
overlapped = TRUE;
}
else
{
y1 = floor (box->bounds.origin.y + box->bounds.size.height - box->corner[corner].height - clip_radius);
y2 = ceil (box->bounds.origin.y + box->bounds.size.height + clip_radius);
y = y2;
sy = -1;
max_other = MAX(box->corner[GSK_CORNER_TOP_LEFT].height, box->corner[GSK_CORNER_TOP_RIGHT].height);
y3 = ceil (box->bounds.origin.y + max_other + clip_radius);
if (y3 > y1)
overlapped = TRUE;
}
drawn_rect->x = x1;
drawn_rect->y = y1;
drawn_rect->width = x2 - x1;
drawn_rect->height = y2 - y1;
cairo_rectangle (cr, x1, y1, x2 - x1, y2 - y1);
cairo_clip (cr);
if (shadow->inset || overlapped)
{
/* Fall back to generic path if inset or if the corner radius
runs into each other */
draw_shadow (shadow, cr, box, clip_box, GSK_BLUR_X | GSK_BLUR_Y);
return;
}
if (has_empty_clip (cr))
return;
/* At this point we're drawing a blurred outset corner. The only
* things that affect the output of the blurred mask in this case
* is:
*
* What corner this is, which defines the orientation (sx,sy)
* and position (x,y)
*
* The blur radius (which also defines the clip_radius)
*
* The the horizontal and vertical corner radius
*
* We apply the first position and orientation when drawing the
* mask, so we cache rendered masks based on the blur radius and the
* corner radius.
*/
if (corner_mask_cache == NULL)
corner_mask_cache = g_hash_table_new_full ((GHashFunc)corner_mask_hash,
(GEqualFunc)corner_mask_equal,
g_free, (GDestroyNotify)cairo_surface_destroy);
key.radius = radius;
key.corner = box->corner[corner];
mask = g_hash_table_lookup (corner_mask_cache, &key);
if (mask == NULL)
{
mask = cairo_surface_create_similar_image (cairo_get_target (cr), CAIRO_FORMAT_A8,
drawn_rect->width + clip_radius,
drawn_rect->height + clip_radius);
mask_cr = cairo_create (mask);
_gtk_rounded_box_init_rect (&corner_box, clip_radius, clip_radius, 2*drawn_rect->width, 2*drawn_rect->height);
corner_box.corner[0] = box->corner[corner];
gsk_rounded_rect_path (&corner_box, mask_cr);
cairo_fill (mask_cr);
gsk_cairo_blur_surface (mask, radius, GSK_BLUR_X | GSK_BLUR_Y);
cairo_destroy (mask_cr);
g_hash_table_insert (corner_mask_cache, g_memdup (&key, sizeof (key)), mask);
}
gdk_cairo_set_source_rgba (cr, _gtk_css_rgba_value_get_rgba (shadow->color));
pattern = cairo_pattern_create_for_surface (mask);
cairo_matrix_init_identity (&matrix);
cairo_matrix_scale (&matrix, sx, sy);
cairo_matrix_translate (&matrix, -x, -y);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_mask (cr, pattern);
cairo_pattern_destroy (pattern);
}
static void
draw_shadow_side (const GtkCssValue *shadow,
cairo_t *cr,
GskRoundedRect *box,
GskRoundedRect *clip_box,
GtkCssSide side,
cairo_rectangle_int_t *drawn_rect)
{
GskBlurFlags blur_flags = GSK_BLUR_REPEAT;
gdouble radius, clip_radius;
int x1, x2, y1, y2;
radius = _gtk_css_number_value_get (shadow->radius, 0);
clip_radius = gsk_cairo_blur_compute_pixels (radius);
if (side == GTK_CSS_TOP || side == GTK_CSS_BOTTOM)
{
blur_flags |= GSK_BLUR_Y;
x1 = floor (box->bounds.origin.x - clip_radius);
x2 = ceil (box->bounds.origin.x + box->bounds.size.width + clip_radius);
}
else if (side == GTK_CSS_LEFT)
{
x1 = floor (box->bounds.origin.x -clip_radius);
x2 = ceil (box->bounds.origin.x + clip_radius);
}
else
{
x1 = floor (box->bounds.origin.x + box->bounds.size.width -clip_radius);
x2 = ceil (box->bounds.origin.x + box->bounds.size.width + clip_radius);
}
if (side == GTK_CSS_LEFT || side == GTK_CSS_RIGHT)
{
blur_flags |= GSK_BLUR_X;
y1 = floor (box->bounds.origin.y - clip_radius);
y2 = ceil (box->bounds.origin.y + box->bounds.size.height + clip_radius);
}
else if (side == GTK_CSS_TOP)
{
y1 = floor (box->bounds.origin.y -clip_radius);
y2 = ceil (box->bounds.origin.y + clip_radius);
}
else
{
y1 = floor (box->bounds.origin.y + box->bounds.size.height -clip_radius);
y2 = ceil (box->bounds.origin.y + box->bounds.size.height + clip_radius);
}
drawn_rect->x = x1;
drawn_rect->y = y1;
drawn_rect->width = x2 - x1;
drawn_rect->height = y2 - y1;
cairo_rectangle (cr, x1, y1, x2 - x1, y2 - y1);
cairo_clip (cr);
draw_shadow (shadow, cr, box, clip_box, blur_flags);
}
void
_gtk_css_shadow_value_paint_box (const GtkCssValue *shadow,
cairo_t *cr,
const GskRoundedRect*padding_box)
{
GskRoundedRect box, clip_box;
double spread, radius, clip_radius, x, y, outside;
double x1c, y1c, x2c, y2c;
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;
cairo_clip_extents (cr, &x1c, &y1c, &x2c, &y2c);
if ((shadow->inset && !gsk_rounded_rect_intersects_rect (padding_box, &GRAPHENE_RECT_INIT (x1c, y1c, x2c - x1c, y2c - y1c))) ||
(!shadow->inset && gsk_rounded_rect_contains_rect (padding_box, &GRAPHENE_RECT_INIT (x1c, y1c, x2c - x1c, y2c - y1c))))
return;
cairo_save (cr);
spread = _gtk_css_number_value_get (shadow->spread, 0);
radius = _gtk_css_number_value_get (shadow->radius, 0);
clip_radius = gsk_cairo_blur_compute_pixels (radius);
x = _gtk_css_number_value_get (shadow->hoffset, 0);
y = _gtk_css_number_value_get (shadow->voffset, 0);
if (shadow->inset)
{
gsk_rounded_rect_path (padding_box, cr);
cairo_clip (cr);
}
else
{
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
gsk_rounded_rect_path (padding_box, cr);
outside = spread + clip_radius + MAX (fabs (x), fabs (y));
clip_box = *padding_box;
gsk_rounded_rect_shrink (&clip_box, -outside, -outside, -outside, -outside);
_gtk_rounded_box_clip_path (&clip_box, cr);
cairo_clip (cr);
}
box = *padding_box;
gsk_rounded_rect_offset (&box, x, y);
if (shadow->inset)
gsk_rounded_rect_shrink (&box, spread, spread, spread, spread);
else /* Outset */
gsk_rounded_rect_shrink (&box, -spread, -spread, -spread, -spread);
clip_box = *padding_box;
gsk_rounded_rect_shrink (&clip_box, -clip_radius, -clip_radius, -clip_radius, -clip_radius);
if (!needs_blur (shadow))
draw_shadow (shadow, cr, &box, &clip_box, GSK_BLUR_NONE);
else
{
int i;
cairo_region_t *remaining;
cairo_rectangle_int_t r;
/* For the blurred case we divide the rendering into 9 parts,
* 4 of the corners, 4 for the horizonat/vertical lines and
* one for the interior. We make the non-interior parts
* large enought to fit the full radius of the blur, so that
* the interior part can be drawn solidly.
*/
if (shadow->inset)
{
/* In the inset case we want to paint the whole clip-box.
* We could remove the part of "box" where the blur doesn't
* reach, but computing that is a bit tricky since the
* rounded corners are on the "inside" of it. */
r.x = floor (clip_box.bounds.origin.x);
r.y = floor (clip_box.bounds.origin.y);
r.width = ceil (clip_box.bounds.origin.x + clip_box.bounds.size.width) - r.x;
r.height = ceil (clip_box.bounds.origin.y + clip_box.bounds.size.height) - r.y;
remaining = cairo_region_create_rectangle (&r);
}
else
{
/* In the outset case we want to paint the entire box, plus as far
* as the radius reaches from it */
r.x = floor (box.bounds.origin.x - clip_radius);
r.y = floor (box.bounds.origin.y - clip_radius);
r.width = ceil (box.bounds.origin.x + box.bounds.size.width + clip_radius) - r.x;
r.height = ceil (box.bounds.origin.y + box.bounds.size.height + clip_radius) - r.y;
remaining = cairo_region_create_rectangle (&r);
}
/* First do the corners of box */
for (i = 0; i < 4; i++)
{
cairo_save (cr);
/* Always clip with remaining to ensure we never draw any area twice */
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow_corner (shadow, cr, &box, &clip_box, i, &r);
cairo_restore (cr);
/* We drew the region, remove it from remaining */
cairo_region_subtract_rectangle (remaining, &r);
}
/* Then the sides */
for (i = 0; i < 4; i++)
{
cairo_save (cr);
/* Always clip with remaining to ensure we never draw any area twice */
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow_side (shadow, cr, &box, &clip_box, i, &r);
cairo_restore (cr);
/* We drew the region, remove it from remaining */
cairo_region_subtract_rectangle (remaining, &r);
}
/* Then the rest, which needs no blurring */
cairo_save (cr);
gdk_cairo_region (cr, remaining);
cairo_clip (cr);
draw_shadow (shadow, cr, &box, &clip_box, GSK_BLUR_NONE);
cairo_restore (cr);
cairo_region_destroy (remaining);
}
cairo_restore (cr);
}
void
gtk_css_shadow_value_snapshot_outset (const GtkCssValue *shadow,
GtkSnapshot *snapshot,

3
gtk/gtkcssshadowvalueprivate.h
View File

@ -44,9 +44,6 @@ void gtk_css_shadow_value_get_shadow (const GtkCssValue
void _gtk_css_shadow_value_paint_icon (const GtkCssValue *shadow,
cairo_t *cr);
void _gtk_css_shadow_value_paint_box (const GtkCssValue *shadow,
cairo_t *cr,
const GskRoundedRect *padding_box);
void gtk_css_shadow_value_snapshot_outset (const GtkCssValue *shadow,
GtkSnapshot *snapshot,

17
gtk/gtkrender.c
View File

@ -29,7 +29,6 @@
#include "gtkcssshadowsvalueprivate.h"
#include "gtkcsstransformvalueprivate.h"
#include "gtkhslaprivate.h"
#include "gtkrenderbackgroundprivate.h"
#include "gtkrenderborderprivate.h"
#include "gtkrendericonprivate.h"
#include "gtkstylecontextprivate.h"
@ -238,14 +237,26 @@ gtk_render_background (GtkStyleContext *context,
gdouble width,
gdouble height)
{
GtkSnapshot *snapshot;
GskRenderNode *node;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
gtk_css_style_render_background (gtk_style_context_lookup_style (context),
cr, x, y, width, height);
snapshot = gtk_snapshot_new ();
gtk_snapshot_render_background (snapshot, context, x, y, width, height);
node = gtk_snapshot_free_to_node (snapshot);
if (node == NULL)
return;
cairo_save (cr);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
gsk_render_node_unref (node);
}
/**

321
gtk/gtkrenderbackground.c
View File

@ -57,23 +57,6 @@ struct _GtkThemingBackground {
GskRoundedRect boxes[N_BOXES];
};
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_css_style_get_value (bg->style, GTK_CSS_PROPERTY_BACKGROUND_CLIP),
n_values - 1));
gsk_rounded_rect_path (&bg->boxes[clip], cr);
gdk_cairo_set_source_rgba (cr, bg_color);
cairo_fill (cr);
}
static void
gtk_theming_background_snapshot_color (const GtkThemingBackground *bg,
GtkSnapshot *snapshot,
@ -103,230 +86,6 @@ gtk_theming_background_snapshot_color (const GtkThemingBackground *bg,
}
}
static gboolean
_gtk_theming_background_needs_push_group (GtkCssStyle *style)
{
GtkCssValue *blend_modes;
gint i;
blend_modes = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BACKGROUND_BLEND_MODE);
/*
* If we have any blend mode different than NORMAL, we'll need to
* push a group in order to correctly apply the blend modes.
*/
for (i = _gtk_css_array_value_get_n_values (blend_modes); i > 0; i--)
{
GskBlendMode blend_mode;
blend_mode = _gtk_css_blend_mode_value_get (_gtk_css_array_value_get_nth (blend_modes, i - 1));
if (blend_mode != GSK_BLEND_MODE_DEFAULT)
return TRUE;
}
return FALSE;
}
static void
gtk_theming_background_paint_layer (GtkThemingBackground *bg,
guint idx,
cairo_t *cr)
{
GtkCssRepeatStyle hrepeat, vrepeat;
const GtkCssValue *pos, *repeat;
GtkCssImage *image;
GskBlendMode blend_mode;
const GskRoundedRect *origin;
double image_width, image_height;
double width, height;
pos = _gtk_css_array_value_get_nth (gtk_css_style_get_value (bg->style, GTK_CSS_PROPERTY_BACKGROUND_POSITION), idx);
repeat = _gtk_css_array_value_get_nth (gtk_css_style_get_value (bg->style, 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_css_style_get_value (bg->style, GTK_CSS_PROPERTY_BACKGROUND_IMAGE),
idx));
blend_mode = _gtk_css_blend_mode_value_get (
_gtk_css_array_value_get_nth (
gtk_css_style_get_value (bg->style, GTK_CSS_PROPERTY_BACKGROUND_BLEND_MODE), idx));
origin = &bg->boxes[
_gtk_css_area_value_get (
_gtk_css_array_value_get_nth (
gtk_css_style_get_value (bg->style, GTK_CSS_PROPERTY_BACKGROUND_ORIGIN),
idx))];
width = origin->bounds.size.width;
height = origin->bounds.size.height;
if (image == NULL || width <= 0 || height <= 0)
return;
_gtk_css_bg_size_value_compute_size (_gtk_css_array_value_get_nth (gtk_css_style_get_value (bg->style, 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);
gsk_rounded_rect_path (
&bg->boxes[
_gtk_css_area_value_get (
_gtk_css_array_value_get_nth (
gtk_css_style_get_value (bg->style, GTK_CSS_PROPERTY_BACKGROUND_CLIP),
idx))],
cr);
cairo_clip (cr);
cairo_translate (cr, origin->bounds.origin.x, origin->bounds.origin.y);
/*
* Apply the blend mode, if any.
*/
if (G_UNLIKELY (_gtk_css_blend_mode_get_operator (blend_mode) != cairo_get_operator (cr)))
cairo_set_operator (cr, _gtk_css_blend_mode_get_operator (blend_mode));
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);
}
/*
* Since this cairo_t can be shared with other widgets,
* we must reset the operator after all the backgrounds
* are properly rendered.
*/
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_restore (cr);
}
static void
gtk_theming_background_snapshot_layer (const GtkThemingBackground *bg,
guint idx,
@ -530,86 +289,6 @@ gtk_theming_background_init (GtkThemingBackground *bg,
0, 0, width, height);
}
void
gtk_css_style_render_background (GtkCssStyle *style,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkThemingBackground bg;
gint idx;
GtkCssValue *background_image;
GtkCssValue *box_shadow;
const GdkRGBA *bg_color;
gboolean needs_push_group;
gint number_of_layers;
background_image = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BACKGROUND_IMAGE);
bg_color = _gtk_css_rgba_value_get_rgba (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BACKGROUND_COLOR));
box_shadow = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BOX_SHADOW);
/* This is the common default case of no background */
if (gdk_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;
gtk_theming_background_init (&bg, style, width, height);
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);
/*
* When we have a blend mode set for the background, we cannot blend the current
* widget's drawing with whatever the content that the Cairo context may have.
* Because of that, push the drawing to a new group before drawing the background
* layers, and paint the resulting image back after.
*/
needs_push_group = _gtk_theming_background_needs_push_group (style);
if (needs_push_group)
{
cairo_save (cr);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
cairo_push_group (cr);
}
_gtk_theming_background_paint_color (&bg, cr, bg_color, background_image);
number_of_layers = _gtk_css_array_value_get_n_values (background_image);
for (idx = number_of_layers - 1; idx >= 0; idx--)
{
gtk_theming_background_paint_layer (&bg, idx, cr);
}
/* Paint back the resulting surface */
if (needs_push_group)
{
cairo_pop_group_to_source (cr);
cairo_paint (cr);
cairo_restore (cr);
}
/* Inset shadows */
_gtk_css_shadows_value_paint_box (box_shadow,
cr,
&bg.boxes[GTK_CSS_AREA_PADDING_BOX],
TRUE);
cairo_restore (cr);
}
void
gtk_css_style_snapshot_background (GtkCssStyle *style,
GtkSnapshot *snapshot,

6
gtk/gtkrenderbackgroundprivate.h
View File

@ -28,12 +28,6 @@
G_BEGIN_DECLS
void gtk_css_style_render_background (GtkCssStyle *style,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
void gtk_css_style_snapshot_background (GtkCssStyle *style,
GtkSnapshot *snapshot,
gdouble width,