* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
+#include "config.h"
+
#include "gtkcsstypesprivate.h"
#include "gtkthemingbackgroundprivate.h"
#include "gtkthemingengineprivate.h"
+#include <math.h>
+
#include <gdk/gdk.h>
+/* this is in case round() is not provided by the compiler,
+ * such as in the case of C89 compilers, like MSVC
+ */
+#include "fallback-c89.c"
+
static void
_gtk_theming_background_apply_window_background (GtkThemingBackground *bg,
cairo_t *cr)
{
- if (gtk_theming_engine_has_class (bg->engine, "background"))
+ if (gtk_style_context_has_class (bg->context, "background"))
{
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.0); /* transparent */
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
}
}
-static void
-_gtk_theming_background_apply_running_transformation (GtkThemingBackground *bg,
- cairo_t *cr)
-{
- gboolean running;
- gdouble progress;
- cairo_pattern_t *other_pattern;
- GtkStateFlags other_flags;
- GdkRGBA other_bg;
- cairo_pattern_t *new_pattern = NULL;
-
- running = gtk_theming_engine_state_is_running (bg->engine, GTK_STATE_PRELIGHT, &progress);
-
- if (!running)
- return;
-
- if (bg->flags & GTK_STATE_FLAG_PRELIGHT)
- {
- other_flags = bg->flags & ~(GTK_STATE_FLAG_PRELIGHT);
- progress = 1 - progress;
- }
- else
- other_flags = bg->flags | GTK_STATE_FLAG_PRELIGHT;
-
- gtk_theming_engine_get_background_color (bg->engine, other_flags, &other_bg);
- _gtk_theming_engine_get (bg->engine, other_flags, &bg->prop_context,
- "background-image", &other_pattern,
- NULL);
-
- if (bg->pattern && other_pattern)
- {
- cairo_pattern_type_t type, other_type;
- gint n0, n1;
-
- cairo_pattern_get_color_stop_count (bg->pattern, &n0);
- cairo_pattern_get_color_stop_count (other_pattern, &n1);
- type = cairo_pattern_get_type (bg->pattern);
- other_type = cairo_pattern_get_type (other_pattern);
-
- if (type == other_type && n0 == n1)
- {
- gdouble offset0, red0, green0, blue0, alpha0;
- gdouble offset1, red1, green1, blue1, alpha1;
- gdouble x00, x01, y00, y01, x10, x11, y10, y11;
- gdouble r00, r01, r10, r11;
- guint i;
-
- if (type == CAIRO_PATTERN_TYPE_LINEAR)
- {
- cairo_pattern_get_linear_points (bg->pattern, &x00, &y00, &x01, &y01);
- cairo_pattern_get_linear_points (other_pattern, &x10, &y10, &x11, &y11);
-
- new_pattern = cairo_pattern_create_linear (x00 + (x10 - x00) * progress,
- y00 + (y10 - y00) * progress,
- x01 + (x11 - x01) * progress,
- y01 + (y11 - y01) * progress);
- }
- else
- {
- cairo_pattern_get_radial_circles (bg->pattern, &x00, &y00, &r00, &x01, &y01, &r01);
- cairo_pattern_get_radial_circles (other_pattern, &x10, &y10, &r10, &x11, &y11, &r11);
-
- new_pattern = cairo_pattern_create_radial (x00 + (x10 - x00) * progress,
- y00 + (y10 - y00) * progress,
- r00 + (r10 - r00) * progress,
- x01 + (x11 - x01) * progress,
- y01 + (y11 - y01) * progress,
- r01 + (r11 - r01) * progress);
- }
-
- cairo_pattern_set_filter (new_pattern, CAIRO_FILTER_FAST);
- i = 0;
-
- /* Blend both gradients into one */
- while (i < n0 && i < n1)
- {
- cairo_pattern_get_color_stop_rgba (bg->pattern, i,
- &offset0,
- &red0, &green0, &blue0,
- &alpha0);
- cairo_pattern_get_color_stop_rgba (other_pattern, i,
- &offset1,
- &red1, &green1, &blue1,
- &alpha1);
-
- cairo_pattern_add_color_stop_rgba (new_pattern,
- offset0 + ((offset1 - offset0) * progress),
- red0 + ((red1 - red0) * progress),
- green0 + ((green1 - green0) * progress),
- blue0 + ((blue1 - blue0) * progress),
- alpha0 + ((alpha1 - alpha0) * progress));
- i++;
- }
- }
- else
- {
- cairo_save (cr);
-
- cairo_rectangle (cr, 0, 0, bg->paint_area.width, bg->paint_area.height);
- cairo_clip (cr);
-
- cairo_push_group (cr);
-
- cairo_scale (cr, bg->paint_area.width, bg->paint_area.height);
- cairo_set_source (cr, other_pattern);
- cairo_paint_with_alpha (cr, progress);
- cairo_set_source (cr, bg->pattern);
- cairo_paint_with_alpha (cr, 1.0 - progress);
-
- new_pattern = cairo_pop_group (cr);
-
- cairo_restore (cr);
- }
- }
- else if (bg->pattern || other_pattern)
- {
- cairo_pattern_t *p;
- const GdkRGBA *c;
- gdouble x0, y0, x1, y1, r0, r1;
- gint n, i;
-
- /* Blend a pattern with a color */
- if (bg->pattern)
- {
- p = bg->pattern;
- c = &other_bg;
- progress = 1 - progress;
- }
- else
- {
- p = other_pattern;
- c = &bg->bg_color;
- }
-
- if (cairo_pattern_get_type (p) == CAIRO_PATTERN_TYPE_LINEAR)
- {
- cairo_pattern_get_linear_points (p, &x0, &y0, &x1, &y1);
- new_pattern = cairo_pattern_create_linear (x0, y0, x1, y1);
- }
- else
- {
- cairo_pattern_get_radial_circles (p, &x0, &y0, &r0, &x1, &y1, &r1);
- new_pattern = cairo_pattern_create_radial (x0, y0, r0, x1, y1, r1);
- }
-
- cairo_pattern_get_color_stop_count (p, &n);
-
- for (i = 0; i < n; i++)
- {
- gdouble red1, green1, blue1, alpha1;
- gdouble offset;
-
- cairo_pattern_get_color_stop_rgba (p, i,
- &offset,
- &red1, &green1, &blue1,
- &alpha1);
- cairo_pattern_add_color_stop_rgba (new_pattern, offset,
- c->red + ((red1 - c->red) * progress),
- c->green + ((green1 - c->green) * progress),
- c->blue + ((blue1 - c->blue) * progress),
- c->alpha + ((alpha1 - c->alpha) * progress));
- }
- }
- else
- {
- /* Merge just colors */
- new_pattern = cairo_pattern_create_rgba (CLAMP (bg->bg_color.red + ((other_bg.red - bg->bg_color.red) * progress), 0, 1),
- CLAMP (bg->bg_color.green + ((other_bg.green - bg->bg_color.green) * progress), 0, 1),
- CLAMP (bg->bg_color.blue + ((other_bg.blue - bg->bg_color.blue) * progress), 0, 1),
- CLAMP (bg->bg_color.alpha + ((other_bg.alpha - bg->bg_color.alpha) * progress), 0, 1));
- }
-
- if (new_pattern)
- {
- /* Replace pattern to use */
- cairo_pattern_destroy (bg->pattern);
- bg->pattern = new_pattern;
- }
-
- if (other_pattern)
- cairo_pattern_destroy (other_pattern);
-}
-
static void
_gtk_theming_background_apply_origin (GtkThemingBackground *bg)
{
GtkCssArea origin;
cairo_rectangle_t image_rect;
- gtk_theming_engine_get (bg->engine, bg->flags,
- "background-origin", &origin,
- NULL);
+ gtk_style_context_get (bg->context, bg->flags,
+ "background-origin", &origin,
+ NULL);
/* The default size of the background image depends on the
background-origin value as this affects the top left
break;
}
+ /* XXX: image_rect might have negative width/height here.
+ * Do we need to do something about it? */
bg->image_rect = image_rect;
- bg->prop_context.width = image_rect.width;
- bg->prop_context.height = image_rect.height;
}
static void
{
GtkCssArea clip;
- gtk_theming_engine_get (bg->engine, bg->flags,
- "background-clip", &clip,
- NULL);
+ gtk_style_context_get (bg->context, bg->flags,
+ "background-clip", &clip,
+ NULL);
if (clip == GTK_CSS_AREA_PADDING_BOX)
{
}
}
+static void
+_gtk_theming_background_get_cover_contain (GtkCssImage *image,
+ gboolean cover,
+ double width,
+ double height,
+ double *concrete_width,
+ double *concrete_height)
+{
+ double aspect, image_aspect;
+
+ image_aspect = _gtk_css_image_get_aspect_ratio (image);
+ if (image_aspect == 0.0)
+ {
+ *concrete_width = width;
+ *concrete_height = height;
+ return;
+ }
+
+ aspect = width / height;
+
+ if ((aspect >= image_aspect && cover) ||
+ (aspect < image_aspect && !cover))
+ {
+ *concrete_width = width;
+ *concrete_height = width / image_aspect;
+ }
+ else
+ {
+ *concrete_height = height;
+ *concrete_width = height * image_aspect;
+ }
+}
+
static void
_gtk_theming_background_paint (GtkThemingBackground *bg,
cairo_t *cr)
{
+ cairo_save (cr);
+
_gtk_rounded_box_path (&bg->clip_box, cr);
+ cairo_clip (cr);
+
gdk_cairo_set_source_rgba (cr, &bg->bg_color);
+ cairo_paint (cr);
- if (bg->pattern)
+ if (bg->image
+ && bg->image_rect.width > 0
+ && bg->image_rect.height > 0)
{
- GtkCssBackgroundRepeat *repeat;
- cairo_surface_t *surface;
- int scale_width, scale_height;
-
- gtk_theming_engine_get (bg->engine, bg->flags,
- "background-repeat", &repeat,
- NULL);
-
- if (cairo_pattern_get_surface (bg->pattern, &surface) != CAIRO_STATUS_SUCCESS)
- surface = NULL;
-
- if (surface && repeat)
+ GtkCssBackgroundRepeat hrepeat, vrepeat;
+ GtkCssBackgroundSize *size;
+ double image_width, image_height;
+ double width, height;
+
+ size = g_value_get_boxed (_gtk_style_context_peek_property (bg->context, "background-size"));
+ gtk_style_context_get (bg->context, bg->flags,
+ "background-repeat", &hrepeat,
+ NULL);
+ vrepeat = GTK_CSS_BACKGROUND_VERTICAL (hrepeat);
+ hrepeat = GTK_CSS_BACKGROUND_HORIZONTAL (hrepeat);
+ width = bg->image_rect.width;
+ height = bg->image_rect.height;
+
+ if (size->contain || size->cover)
+ _gtk_theming_background_get_cover_contain (bg->image,
+ size->cover,
+ width,
+ height,
+ &image_width,
+ &image_height);
+ else
+ _gtk_css_image_get_concrete_size (bg->image,
+ /* note: 0 does the right thing here for 'auto' */
+ _gtk_css_number_get (&size->width, width),
+ _gtk_css_number_get (&size->height, height),
+ width, height,
+ &image_width, &image_height);
+
+ /* optimization */
+ if (image_width == width)
+ hrepeat = GTK_CSS_BACKGROUND_NO_REPEAT;
+ if (image_height == height)
+ vrepeat = GTK_CSS_BACKGROUND_NO_REPEAT;
+
+ cairo_translate (cr, bg->image_rect.x, bg->image_rect.y);
+
+ if (hrepeat == GTK_CSS_BACKGROUND_NO_REPEAT && vrepeat == GTK_CSS_BACKGROUND_NO_REPEAT)
{
- scale_width = cairo_image_surface_get_width (surface);
- scale_height = cairo_image_surface_get_height (surface);
- if (repeat->repeat == GTK_CSS_BACKGROUND_REPEAT_STYLE_REPEAT)
- cairo_pattern_set_extend (bg->pattern, CAIRO_EXTEND_REPEAT);
- else if (repeat->repeat == GTK_CSS_BACKGROUND_REPEAT_STYLE_NO_REPEAT)
- cairo_pattern_set_extend (bg->pattern, CAIRO_EXTEND_NONE);
+ /* shortcut for normal case */
+ _gtk_css_image_draw (bg->image, cr, image_width, image_height);
}
else
{
- cairo_pattern_set_extend (bg->pattern, CAIRO_EXTEND_PAD);
- scale_width = bg->image_rect.width;
- scale_height = bg->image_rect.height;
- }
+ int surface_width, surface_height;
+ 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_BACKGROUND_ROUND)
+ {
+ double n = round (width / image_width);
- if (scale_width && scale_height)
- {
- /* Fill background color first */
- cairo_fill_preserve (cr);
+ n = MAX (1, n);
- cairo_translate (cr, bg->image_rect.x, bg->image_rect.y);
- cairo_scale (cr, scale_width, scale_height);
- cairo_set_source (cr, bg->pattern);
- cairo_scale (cr, 1.0 / scale_width, 1.0 / scale_height);
- cairo_translate (cr, -bg->image_rect.x, -bg->image_rect.y);
+ if (vrepeat != GTK_CSS_BACKGROUND_ROUND
+ /* && vsize == auto (it is by default) */)
+ image_height *= width / (image_width * n);
+ image_width = width / n;
+ }
+ if (vrepeat == GTK_CSS_BACKGROUND_ROUND)
+ {
+ double n = round (height / image_height);
- g_free (repeat);
+ n = MAX (1, n);
+
+ if (hrepeat != GTK_CSS_BACKGROUND_ROUND
+ /* && hsize == auto (it is by default) */)
+ image_width *= height / (image_height * n);
+ image_height = height / n;
+ }
- cairo_pattern_destroy (bg->pattern);
- bg->pattern = NULL;
+ /* if hrepeat or vrepeat is 'space', we create a somewhat larger surface
+ * to store the extra space. */
+ if (hrepeat == GTK_CSS_BACKGROUND_SPACE)
+ {
+ double n = floor (width / image_width);
+ surface_width = n ? round (width / n) : 0;
+ }
+ else
+ surface_width = round (image_width);
+
+ if (vrepeat == GTK_CSS_BACKGROUND_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 (bg->image, cr2, image_width, image_height);
+ cairo_destroy (cr2);
+
+ cairo_set_source_surface (cr, surface,
+ /* background-position goes here */
+ 0, 0);
+ cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
+ cairo_surface_destroy (surface);
+
+ cairo_rectangle (cr,
+ 0, 0,
+ hrepeat == GTK_CSS_BACKGROUND_NO_REPEAT ? image_width : width,
+ vrepeat == GTK_CSS_BACKGROUND_NO_REPEAT ? image_height : height);
+ cairo_fill (cr);
}
}
- cairo_fill (cr);
+ cairo_restore (cr);
}
static void
{
GtkShadow *box_shadow;
- gtk_theming_engine_get (bg->engine, bg->flags,
- "box-shadow", &box_shadow,
- NULL);
+ gtk_style_context_get (bg->context, bg->flags,
+ "box-shadow", &box_shadow,
+ NULL);
if (box_shadow != NULL)
{
}
static void
-_gtk_theming_background_init_engine (GtkThemingBackground *bg)
+_gtk_theming_background_init_context (GtkThemingBackground *bg)
{
- bg->flags = gtk_theming_engine_get_state (bg->engine);
+ bg->flags = gtk_style_context_get_state (bg->context);
- gtk_theming_engine_get_border (bg->engine, bg->flags, &bg->border);
- gtk_theming_engine_get_padding (bg->engine, bg->flags, &bg->padding);
- gtk_theming_engine_get_background_color (bg->engine, bg->flags, &bg->bg_color);
+ gtk_style_context_get_border (bg->context, bg->flags, &bg->border);
+ gtk_style_context_get_padding (bg->context, bg->flags, &bg->padding);
+ gtk_style_context_get_background_color (bg->context, bg->flags, &bg->bg_color);
/* In the CSS box model, by default the background positioning area is
* the padding-box, i.e. all the border-box minus the borders themselves,
* right now we just shrink to the default.
*/
_gtk_rounded_box_init_rect (&bg->padding_box, 0, 0, bg->paint_area.width, bg->paint_area.height);
- _gtk_rounded_box_apply_border_radius (&bg->padding_box, bg->engine, bg->flags, bg->junction);
+
+ _gtk_rounded_box_apply_border_radius_for_context (&bg->padding_box, bg->context, bg->flags, bg->junction);
bg->clip_box = bg->padding_box;
_gtk_rounded_box_shrink (&bg->padding_box,
_gtk_theming_background_apply_clip (bg);
_gtk_theming_background_apply_origin (bg);
- _gtk_theming_engine_get (bg->engine, bg->flags, &bg->prop_context,
- "background-image", &bg->pattern,
- NULL);
+ bg->image = g_value_get_object (_gtk_style_context_peek_property (bg->context, "background-image"));
}
void
gdouble width,
gdouble height,
GtkJunctionSides junction)
+{
+ GtkStyleContext *context;
+
+ g_assert (bg != NULL);
+
+ context = _gtk_theming_engine_get_context (engine);
+ _gtk_theming_background_init_from_context (bg, context,
+ x, y, width, height,
+ junction);
+}
+
+void
+_gtk_theming_background_init_from_context (GtkThemingBackground *bg,
+ GtkStyleContext *context,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ GtkJunctionSides junction)
{
g_assert (bg != NULL);
- bg->engine = engine;
+ bg->context = context;
bg->paint_area.x = x;
bg->paint_area.y = y;
bg->paint_area.width = width;
bg->paint_area.height = height;
- bg->pattern = NULL;
+ bg->image = NULL;
bg->junction = junction;
- _gtk_theming_background_init_engine (bg);
+ _gtk_theming_background_init_context (bg);
}
void
cairo_translate (cr, bg->paint_area.x, bg->paint_area.y);
_gtk_theming_background_apply_window_background (bg, cr);
- _gtk_theming_background_apply_running_transformation (bg, cr);
_gtk_theming_background_paint (bg, cr);
_gtk_theming_background_apply_shadow (bg, cr);
gboolean
_gtk_theming_background_has_background_image (GtkThemingBackground *bg)
{
- return (bg->pattern != NULL) ? TRUE : FALSE;
+ return (bg->image != NULL) ? TRUE : FALSE;
}
projects / ~andy / gtk / blobdiff