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gtk3-tqt-engine
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gtk3-tqt-engine/tdegtk/tdegtk-cairo-support.c

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Initial import of renamed Unico engine, ready for hacking!
12 years ago
/* The TdeGtk Theming Engine for Gtk+.
* Copyright (C) 2011 Canonical Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* Authored by Andrea Cimitan <andrea.cimitan@canonical.com>
*
*/
#include <cairo.h>
#include <gtk/gtk.h>
#include "gtkroundedboxprivate.h"
#include "tdegtk-cairo-support.h"
#include "tdegtk-support.h"
#include "tdegtk-types.h"
/* apply default color */
static void
apply_default_color (GdkRGBA *colors[4],
GdkRGBA *default_color)
{
gint i;
for (i = 0; i < 4; i++)
if (tdegtk_gdk_rgba_is_default (colors[i]))
*colors[i] = *default_color;
}
/* set the border sides to 0 using hidden_side */
static void
hide_border_sides (GtkBorder *border,
guint hidden_side)
{
if (hidden_side & SIDE_TOP)
border->top = 0;
if (hidden_side & SIDE_RIGHT)
border->right = 0;
if (hidden_side & SIDE_BOTTOM)
border->bottom = 0;
if (hidden_side & SIDE_LEFT)
border->left = 0;
}
/* shrink coordinate using GtkBorder */
static void
shrink_with_border (GtkBorder *border,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height)
{
*x += border->left;
*y += border->top;
*width -= border->left + border->right;
*height -= border->top + border->bottom;
}
/* draw the background */
static void
draw_background (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GdkRGBA bg_color;
GtkBorder border;
GtkRoundedBox border_box;
GtkStateFlags state;
cairo_pattern_t *bg_pat;
gdouble progress;
gboolean running;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"background-image", &bg_pat,
NULL);
gtk_theming_engine_get_background_color (engine, state, &bg_color);
gtk_theming_engine_get_border (engine, state, &border);
hide_border_sides (&border, hidden_side);
running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress);
cairo_save (cr);
cairo_translate (cr, x, y);
/* clear cr if we can draw directly on the background */
if (gtk_theming_engine_has_class (engine, "background"))
{
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.0); /* transparent */
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
}
if (running)
{
GdkRGBA other_bg;
GtkStateFlags other_state;
cairo_pattern_t *new_pat = NULL;
cairo_pattern_t *other_pat;
if (state & GTK_STATE_FLAG_PRELIGHT)
{
other_state = state & ~(GTK_STATE_FLAG_PRELIGHT);
/* useful math function to use for a pulse loop animation could be
* progress = 1 - MAX (1 - fabs ((progress - 0.5)*2), 0);
* but we need to handle the not-running case (once animation finished),
* otherwise the last frame will be the PRELIGHT at full opacity. */
progress = 1 - progress;
}
else
other_state = state | GTK_STATE_FLAG_PRELIGHT;
gtk_theming_engine_get (engine, other_state,
"background-image", &other_pat,
NULL);
gtk_theming_engine_get_background_color (engine, other_state, &other_bg);
if (bg_pat && other_pat)
{
/* two patterns */
cairo_pattern_type_t type, other_type;
gint n0, n1;
cairo_pattern_get_color_stop_count (bg_pat, &n0);
cairo_pattern_get_color_stop_count (other_pat, &n1);
type = cairo_pattern_get_type (bg_pat);
other_type = cairo_pattern_get_type (other_pat);
if (type == other_type && n0 == n1)
{
/* two similar patterns, blend them point by point */
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;
gint i;
if (type == CAIRO_PATTERN_TYPE_LINEAR)
{
cairo_pattern_get_linear_points (bg_pat, &x00, &y00, &x01, &y01);
cairo_pattern_get_linear_points (other_pat, &x10, &y10, &x11, &y11);
new_pat = 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_pat, &x00, &y00, &r00, &x01, &y01, &r01);
cairo_pattern_get_radial_circles (other_pat, &x10, &y10, &r10, &x11, &y11, &r11);
new_pat = 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_pat, CAIRO_FILTER_FAST);
i = 0;
while (i < n0 && i < n1)
{
cairo_pattern_get_color_stop_rgba (bg_pat, i,
&offset0,
&red0, &green0, &blue0,
&alpha0);
cairo_pattern_get_color_stop_rgba (other_pat, i,
&offset1,
&red1, &green1, &blue1,
&alpha1);
cairo_pattern_add_color_stop_rgba (new_pat,
offset0 + ((offset1 - offset0) * progress),
red0 + ((red1 - red0) * progress),
green0 + ((green1 - green0) * progress),
blue0 + ((blue1 - blue0) * progress),
alpha0 + ((alpha1 - alpha0) * progress));
i++;
}
}
else
{
/* two different patterns, paint them with alpha */
cairo_save (cr);
cairo_reset_clip (cr);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
cairo_push_group (cr);
cairo_scale (cr, width, height);
cairo_set_source (cr, other_pat);
cairo_paint_with_alpha (cr, progress);
cairo_set_source (cr, bg_pat);
cairo_paint_with_alpha (cr, 1.0 - progress);
new_pat = cairo_pop_group (cr);
cairo_restore (cr);
}
}
else if (bg_pat || other_pat)
{
/* only one pattern, blend it with a color */
const GdkRGBA *c;
cairo_pattern_t *p;
gdouble x0, y0, x1, y1, r0, r1;
gint n, i;
if (bg_pat)
{
p = bg_pat;
c = &other_bg;
progress = 1 - progress;
}
else
{
p = other_pat;
c = &bg_color;
}
if (cairo_pattern_get_type (p) == CAIRO_PATTERN_TYPE_LINEAR)
{
cairo_pattern_get_linear_points (p, &x0, &y0, &x1, &y1);
new_pat = cairo_pattern_create_linear (x0, y0, x1, y1);
}
else
{
cairo_pattern_get_radial_circles (p, &x0, &y0, &r0, &x1, &y1, &r1);
new_pat = 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_pat, 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
{
/* just colors, create a new pattern blending them */
new_pat = cairo_pattern_create_rgba (CLAMP (bg_color.red + ((other_bg.red - bg_color.red) * progress), 0, 1),
CLAMP (bg_color.green + ((other_bg.green - bg_color.green) * progress), 0, 1),
CLAMP (bg_color.blue + ((other_bg.blue - bg_color.blue) * progress), 0, 1),
CLAMP (bg_color.alpha + ((other_bg.alpha - bg_color.alpha) * progress), 0, 1));
}
if (new_pat)
{
/* replace pattern to use */
cairo_pattern_destroy (bg_pat);
bg_pat = new_pat;
}
if (other_pat)
cairo_pattern_destroy (other_pat);
}
/* create the path to fill */
_gtk_rounded_box_init_rect (&border_box, 0, 0, width, height);
_gtk_rounded_box_apply_border_radius (&border_box, engine, state, junction);
_gtk_rounded_box_shrink (&border_box, border.top, border.right, border.bottom, border.left);
_gtk_rounded_box_path (&border_box, cr);
if (bg_pat)
{
/* pattern */
cairo_scale (cr, width, height);
cairo_set_source (cr, bg_pat);
cairo_scale (cr, 1.0 / width, 1.0 / height);
}
else
/* one color */
gdk_cairo_set_source_rgba (cr, &bg_color);
cairo_fill (cr);
if (bg_pat)
cairo_pattern_destroy (bg_pat);
cairo_restore (cr);
}
/* draw the inner glow */
static void
draw_glow (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
}
/* draw a repeated texture */
static void
draw_texture (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GtkStateFlags state;
GValue value = { 0, };
cairo_pattern_t *texture = NULL;
cairo_surface_t *surface = NULL;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_property (engine, "-tdegtk-background-texture", state, &value);
if (!G_VALUE_HOLDS_BOXED (&value))
return;
texture = g_value_dup_boxed (&value);
g_value_unset (&value);
if (texture != NULL)
cairo_pattern_get_surface (texture, &surface);
if (surface != NULL)
{
GtkBorder border;
GtkRoundedBox border_box;
cairo_pattern_t *pat;
gtk_theming_engine_get_border (engine, state, &border);
hide_border_sides (&border, hidden_side);
cairo_save (cr);
cairo_translate (cr, x, y);
/* create the path to fill */
_gtk_rounded_box_init_rect (&border_box, 0, 0, width, height);
_gtk_rounded_box_apply_border_radius (&border_box, engine, state, junction);
_gtk_rounded_box_shrink (&border_box, border.top, border.right, border.bottom, border.left);
_gtk_rounded_box_path (&border_box, cr);
pat = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_extend (pat, CAIRO_EXTEND_REPEAT);
cairo_set_source (cr, pat);
cairo_fill (cr);
cairo_restore (cr);
cairo_pattern_destroy (pat);
}
if (texture != NULL)
cairo_pattern_destroy (texture);
}
void
tdegtk_cairo_draw_background (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GtkBorder *outer_border;
GtkStateFlags state;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"-tdegtk-outer-stroke-width", &outer_border,
NULL);
hide_border_sides (outer_border, hidden_side);
shrink_with_border (outer_border, &x, &y, &width, &height);
/* first layer, background */
draw_background (engine, cr,
x, y,
width, height,
hidden_side, junction);
/* second layer, glow */
draw_glow (engine, cr,
x, y,
width, height,
hidden_side, junction);
/* third layer, texture */
draw_texture (engine, cr,
x, y,
width, height,
hidden_side, junction);
gtk_border_free (outer_border);
}
/* shade a color */
static void
color_shade (const GdkRGBA *color,
gdouble factor,
GdkRGBA *color_return)
{
GtkSymbolicColor *literal, *shade;
literal = gtk_symbolic_color_new_literal (color);
shade = gtk_symbolic_color_new_shade (literal, factor);
gtk_symbolic_color_unref (literal);
gtk_symbolic_color_resolve (shade, NULL, color_return);
gtk_symbolic_color_unref (shade);
}
/* draw the border */
static void
draw_border (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GdkRGBA *colors[4];
GtkBorder border;
GtkBorderStyle border_style;
GtkRoundedBox border_box, padding_box;
GtkStateFlags state;
cairo_pattern_t *border_pat;
gboolean running;
gdouble progress;
static const guint current_side[4] = { SIDE_TOP, SIDE_RIGHT, SIDE_BOTTOM, SIDE_LEFT };
guint i, j;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"border-style", &border_style,
"border-top-color", &colors[0],
"border-right-color", &colors[1],
"border-bottom-color", &colors[2],
"border-left-color", &colors[3],
"-tdegtk-border-gradient", &border_pat,
NULL);
gtk_theming_engine_get_border (engine, state, &border);
hide_border_sides (&border, hidden_side);
running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress);
cairo_save (cr);
cairo_translate (cr, x, y);
if (running)
{
GtkStateFlags other_state;
cairo_pattern_t *new_pat = NULL;
cairo_pattern_t *other_pat;
if (state & GTK_STATE_FLAG_PRELIGHT)
{
other_state = state & ~(GTK_STATE_FLAG_PRELIGHT);
progress = 1 - progress;
}
else
other_state = state | GTK_STATE_FLAG_PRELIGHT;
gtk_theming_engine_get (engine, other_state,
"-tdegtk-border-gradient", &other_pat,
NULL);
if (border_pat && other_pat)
{
/* two patterns */
cairo_pattern_type_t type, other_type;
gint n0, n1;
cairo_pattern_get_color_stop_count (border_pat, &n0);
cairo_pattern_get_color_stop_count (other_pat, &n1);
type = cairo_pattern_get_type (border_pat);
other_type = cairo_pattern_get_type (other_pat);
if (type == other_type && n0 == n1)
{
/* two similar patterns, blend them point by point */
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;
gint i;
if (type == CAIRO_PATTERN_TYPE_LINEAR)
{
cairo_pattern_get_linear_points (border_pat, &x00, &y00, &x01, &y01);
cairo_pattern_get_linear_points (other_pat, &x10, &y10, &x11, &y11);
new_pat = 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 (border_pat, &x00, &y00, &r00, &x01, &y01, &r01);
cairo_pattern_get_radial_circles (other_pat, &x10, &y10, &r10, &x11, &y11, &r11);
new_pat = 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_pat, CAIRO_FILTER_FAST);
i = 0;
while (i < n0 && i < n1)
{
cairo_pattern_get_color_stop_rgba (border_pat, i,
&offset0,
&red0, &green0, &blue0,
&alpha0);
cairo_pattern_get_color_stop_rgba (other_pat, i,
&offset1,
&red1, &green1, &blue1,
&alpha1);
cairo_pattern_add_color_stop_rgba (new_pat,
offset0 + ((offset1 - offset0) * progress),
red0 + ((red1 - red0) * progress),
green0 + ((green1 - green0) * progress),
blue0 + ((blue1 - blue0) * progress),
alpha0 + ((alpha1 - alpha0) * progress));
i++;
}
}
else
{
/* two different patterns, paint them with alpha */
cairo_save (cr);
cairo_reset_clip (cr);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
cairo_push_group (cr);
cairo_scale (cr, width, height);
cairo_set_source (cr, other_pat);
cairo_paint_with_alpha (cr, progress);
cairo_set_source (cr, border_pat);
cairo_paint_with_alpha (cr, 1.0 - progress);
new_pat = cairo_pop_group (cr);
cairo_restore (cr);
}
}
else if (border_pat || other_pat)
{
/* one pattern, blend it with a color */
const GdkRGBA *c;
cairo_pattern_t *p;
gdouble x0, y0, x1, y1, r0, r1;
gint n, i;
if (border_pat)
{
GdkRGBA other_color;
gtk_theming_engine_get_border_color (engine, other_state, &other_color);
p = border_pat;
c = &other_color;
progress = 1 - progress;
}
else
{
GdkRGBA border_color;
gtk_theming_engine_get_border_color (engine, state, &border_color);
p = other_pat;
c = &border_color;
}
if (cairo_pattern_get_type (p) == CAIRO_PATTERN_TYPE_LINEAR)
{
cairo_pattern_get_linear_points (p, &x0, &y0, &x1, &y1);
new_pat = cairo_pattern_create_linear (x0, y0, x1, y1);
}
else
{
cairo_pattern_get_radial_circles (p, &x0, &y0, &r0, &x1, &y1, &r1);
new_pat = 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_pat, 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
{
/* just colors, create new colors blending them */
GdkRGBA *other_colors[4];
gtk_theming_engine_get (engine, other_state,
"border-top-color", &other_colors[0],
"border-right-color", &other_colors[1],
"border-bottom-color", &other_colors[2],
"border-left-color", &other_colors[3],
NULL);
for (i = 0; i < 4; i++)
{
colors[i]->red = CLAMP (colors[i]->red + ((other_colors[i]->red - colors[i]->red) * progress), 0, 1);
colors[i]->green = CLAMP (colors[i]->green + ((other_colors[i]->green - colors[i]->green) * progress), 0, 1);
colors[i]->blue = CLAMP (colors[i]->blue + ((other_colors[i]->blue - colors[i]->blue) * progress), 0, 1);
colors[i]->alpha = CLAMP (colors[i]->alpha + ((other_colors[i]->alpha - colors[i]->alpha) * progress), 0, 1);
gdk_rgba_free (other_colors[i]);
}
}
if (new_pat)
{
/* replace pattern to use */
cairo_pattern_destroy (border_pat);
border_pat = new_pat;
}
if (other_pat)
cairo_pattern_destroy (other_pat);
}
switch (border_style)
{
default:
g_assert_not_reached ();
case GTK_BORDER_STYLE_NONE:
case GTK_BORDER_STYLE_SOLID:
break;
case GTK_BORDER_STYLE_INSET:
color_shade (colors[1], 1.8, colors[1]);
color_shade (colors[2], 1.8, colors[2]);
break;
case GTK_BORDER_STYLE_OUTSET:
color_shade (colors[0], 1.8, colors[0]);
color_shade (colors[3], 1.8, colors[3]);
break;
}
/* create the path to fill */
_gtk_rounded_box_init_rect (&border_box, 0, 0, width, height);
_gtk_rounded_box_apply_border_radius (&border_box, engine, state, junction);
padding_box = border_box;
_gtk_rounded_box_shrink (&padding_box, border.top, border.right, border.bottom, border.left);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
switch (border_style)
{
default:
g_assert_not_reached ();
case GTK_BORDER_STYLE_NONE:
break;
case GTK_BORDER_STYLE_SOLID:
case GTK_BORDER_STYLE_INSET:
case GTK_BORDER_STYLE_OUTSET:
if (border_pat)
{
/* pattern */
cairo_scale (cr, width, height);
cairo_set_source (cr, border_pat);
cairo_scale (cr, 1.0 / width, 1.0 / height);
_gtk_rounded_box_path (&border_box, cr);
_gtk_rounded_box_path (&padding_box, cr);
cairo_fill (cr);
}
else if (gdk_rgba_equal (colors[0], colors[1]) &&
gdk_rgba_equal (colors[0], colors[2]) &&
gdk_rgba_equal (colors[0], colors[3]))
{
/* one color */
gdk_cairo_set_source_rgba (cr, colors[0]);
_gtk_rounded_box_path (&border_box, cr);
_gtk_rounded_box_path (&padding_box, cr);
cairo_fill (cr);
}
else
{
for (i = 0; i < 4; i++)
{
/* different colors */
if (hidden_side & current_side[i])
continue;
for (j = 0; j < 4; j++)
{
if (hidden_side & current_side[j])
continue;
if (i == j ||
gdk_rgba_equal (colors[i], colors[j]))
{
/* we were already painted when i == j */
if (i > j)
break;
if (j == 0)
_gtk_rounded_box_path_top (&border_box, &padding_box, cr);
else if (j == 1)
_gtk_rounded_box_path_right (&border_box, &padding_box, cr);
else if (j == 2)
_gtk_rounded_box_path_bottom (&border_box, &padding_box, cr);
else if (j == 3)
_gtk_rounded_box_path_left (&border_box, &padding_box, cr);
}
}
/* we were already painted when i == j */
if (i > j)
continue;
gdk_cairo_set_source_rgba (cr, colors[i]);
cairo_fill (cr);
}
}
break;
}
cairo_restore (cr);
if (border_pat)
cairo_pattern_destroy (border_pat);
for (i = 0; i < 4; i++)
gdk_rgba_free (colors[i]);
}
/* draw the inner stroke */
static void
draw_inner_stroke (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GdkRGBA *colors[4];
GdkRGBA *inner_stroke_color;
GtkBorder *inner_border;
GtkRoundedBox border_box, padding_box;
GtkStateFlags state;
cairo_pattern_t *inner_stroke_pat;
static const guint current_side[4] = { SIDE_TOP, SIDE_RIGHT, SIDE_BOTTOM, SIDE_LEFT };
guint i, j;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"-tdegtk-inner-stroke-color", &inner_stroke_color,
"-tdegtk-inner-stroke-top-color", &colors[0],
"-tdegtk-inner-stroke-right-color", &colors[1],
"-tdegtk-inner-stroke-bottom-color", &colors[2],
"-tdegtk-inner-stroke-left-color", &colors[3],
"-tdegtk-inner-stroke-gradient", &inner_stroke_pat,
"-tdegtk-inner-stroke-width", &inner_border,
NULL);
hide_border_sides (inner_border, hidden_side);
if (tdegtk_gtk_border_is_zero (inner_border))
goto end_draw_inner_stroke;
apply_default_color (colors, inner_stroke_color);
cairo_save (cr);
cairo_translate (cr, x, y);
/* create the path to fill */
_gtk_rounded_box_init_rect (&border_box, 0, 0, width, height);
_gtk_rounded_box_apply_border_radius (&border_box, engine, state, junction);
padding_box = border_box;
_gtk_rounded_box_shrink (&padding_box, inner_border->top,
inner_border->right,
inner_border->bottom,
inner_border->left);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
if (inner_stroke_pat)
{
/* pattern */
cairo_scale (cr, width, height);
cairo_set_source (cr, inner_stroke_pat);
cairo_scale (cr, 1.0 / width, 1.0 / height);
_gtk_rounded_box_path (&border_box, cr);
_gtk_rounded_box_path (&padding_box, cr);
cairo_fill (cr);
}
else if (gdk_rgba_equal (colors[0], colors[1]) &&
gdk_rgba_equal (colors[0], colors[2]) &&
gdk_rgba_equal (colors[0], colors[3]))
{
/* one color */
gdk_cairo_set_source_rgba (cr, colors[0]);
_gtk_rounded_box_path (&border_box, cr);
_gtk_rounded_box_path (&padding_box, cr);
cairo_fill (cr);
}
else
{
/* different colors */
for (i = 0; i < 4; i++)
{
if (hidden_side & current_side[i])
continue;
for (j = 0; j < 4; j++)
{
if (hidden_side & current_side[j])
continue;
if (i == j ||
gdk_rgba_equal (colors[i], colors[j]))
{
/* we were already painted when i == j */
if (i > j)
break;
if (j == 0)
_gtk_rounded_box_path_top (&border_box, &padding_box, cr);
else if (j == 1)
_gtk_rounded_box_path_right (&border_box, &padding_box, cr);
else if (j == 2)
_gtk_rounded_box_path_bottom (&border_box, &padding_box, cr);
else if (j == 3)
_gtk_rounded_box_path_left (&border_box, &padding_box, cr);
}
}
/* we were already painted when i == j */
if (i > j)
continue;
gdk_cairo_set_source_rgba (cr, colors[i]);
cairo_fill (cr);
}
}
cairo_restore (cr);
end_draw_inner_stroke:
gtk_border_free (inner_border);
if (inner_stroke_pat != NULL)
cairo_pattern_destroy (inner_stroke_pat);
gdk_rgba_free (inner_stroke_color);
for (i = 0; i < 4; i++)
gdk_rgba_free (colors[i]);
}
/* draw the outer stroke */
static void
draw_outer_stroke (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GdkRGBA *outer_stroke_color;
GdkRGBA *colors[4];
GtkBorder *outer_border;
GtkRoundedBox border_box, padding_box;
GtkStateFlags state;
cairo_pattern_t *outer_stroke_pat;
static const guint current_side[4] = { SIDE_TOP, SIDE_RIGHT, SIDE_BOTTOM, SIDE_LEFT };
guint i, j;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"-tdegtk-outer-stroke-color", &outer_stroke_color,
"-tdegtk-outer-stroke-top-color", &colors[0],
"-tdegtk-outer-stroke-right-color", &colors[1],
"-tdegtk-outer-stroke-bottom-color", &colors[2],
"-tdegtk-outer-stroke-left-color", &colors[3],
"-tdegtk-outer-stroke-gradient", &outer_stroke_pat,
"-tdegtk-outer-stroke-width", &outer_border,
NULL);
hide_border_sides (outer_border, hidden_side);
if (tdegtk_gtk_border_is_zero (outer_border))
goto end_draw_outer_stroke;
apply_default_color (colors, outer_stroke_color);
cairo_save (cr);
cairo_translate (cr, x, y);
/* create the path to fill */
_gtk_rounded_box_init_rect (&border_box, 0, 0, width, height);
_gtk_rounded_box_apply_border_radius (&border_box, engine, state, junction);
padding_box = border_box;
_gtk_rounded_box_shrink (&padding_box, outer_border->top,
outer_border->right,
outer_border->bottom,
outer_border->left);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
if (outer_stroke_pat)
{
/* pattern */
cairo_scale (cr, width, height);
cairo_set_source (cr, outer_stroke_pat);
cairo_scale (cr, 1.0 / width, 1.0 / height);
_gtk_rounded_box_path (&border_box, cr);
_gtk_rounded_box_path (&padding_box, cr);
cairo_fill (cr);
}
else if (gdk_rgba_equal (colors[0], colors[1]) &&
gdk_rgba_equal (colors[0], colors[2]) &&
gdk_rgba_equal (colors[0], colors[3]))
{
/* one color */
gdk_cairo_set_source_rgba (cr, colors[0]);
_gtk_rounded_box_path (&border_box, cr);
_gtk_rounded_box_path (&padding_box, cr);
cairo_fill (cr);
}
else
{
/* different colors */
for (i = 0; i < 4; i++)
{
if (hidden_side & current_side[i])
continue;
for (j = 0; j < 4; j++)
{
if (hidden_side & current_side[j])
continue;
if (i == j ||
gdk_rgba_equal (colors[i], colors[j]))
{
/* we were already painted when i == j */
if (i > j)
break;
if (j == 0)
_gtk_rounded_box_path_top (&border_box, &padding_box, cr);
else if (j == 1)
_gtk_rounded_box_path_right (&border_box, &padding_box, cr);
else if (j == 2)
_gtk_rounded_box_path_bottom (&border_box, &padding_box, cr);
else if (j == 3)
_gtk_rounded_box_path_left (&border_box, &padding_box, cr);
}
}
/* we were already painted when i == j */
if (i > j)
continue;
gdk_cairo_set_source_rgba (cr, colors[i]);
cairo_fill (cr);
}
}
cairo_restore (cr);
end_draw_outer_stroke:
gtk_border_free (outer_border);
if (outer_stroke_pat != NULL)
cairo_pattern_destroy (outer_stroke_pat);
gdk_rgba_free (outer_stroke_color);
for (i = 0; i < 4; i++)
gdk_rgba_free (colors[i]);
}
void
tdegtk_cairo_draw_frame (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GtkBorder border;
GtkBorder *outer_border;
GtkStateFlags state;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"-tdegtk-outer-stroke-width", &outer_border,
NULL);
gtk_theming_engine_get_border (engine, state, &border);
hide_border_sides (&border, hidden_side);
hide_border_sides (outer_border, hidden_side);
if (!tdegtk_gtk_border_is_zero (outer_border))
{
/* first layer, outer stroke */
draw_outer_stroke (engine, cr,
x, y,
width, height,
hidden_side, junction);
shrink_with_border (outer_border, &x, &y, &width, &height);
}
/* second layer, inner stroke */
draw_inner_stroke (engine, cr,
x + border.left, y + border.top,
width - (border.left + border.right), height - (border.top + border.bottom),
hidden_side, junction);
/* third layer, border */
draw_border (engine, cr,
x, y,
width, height,
hidden_side, junction);
gtk_border_free (outer_border);
}
gboolean
tdegtk_cairo_draw_from_texture (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags state;
GValue value = { 0, };
cairo_pattern_t *texture = NULL;
cairo_surface_t *surface = NULL;
gboolean retval = FALSE;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_property (engine, "background-image", state, &value);
if (!G_VALUE_HOLDS_BOXED (&value))
return FALSE;
texture = g_value_dup_boxed (&value);
g_value_unset (&value);
if (texture != NULL)
cairo_pattern_get_surface (texture, &surface);
if (surface != NULL)
{
cairo_save (cr);
cairo_scale (cr, width / cairo_image_surface_get_width (surface),
height / cairo_image_surface_get_height (surface));
cairo_set_source_surface (cr, surface, x, y);
cairo_paint (cr);
cairo_restore (cr);
retval = TRUE;
}
if (texture != NULL)
cairo_pattern_destroy (texture);
return retval;
}
void
tdegtk_cairo_round_rect (cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
gint radius,
guint sides,
GtkJunctionSides junction)
{
radius = CLAMP (radius, 0, MIN (width / 2, height / 2));
if (sides & SIDE_RIGHT)
{
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_TOPRIGHT))
cairo_move_to (cr, x + width, y);
else
{
cairo_new_sub_path (cr);
cairo_arc (cr, x + width - radius, y + radius, radius, - G_PI / 4, 0);
}
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT))
cairo_line_to (cr, x + width, y + height);
else
cairo_arc (cr, x + width - radius, y + height - radius, radius, 0, G_PI / 4);
}
if (sides & SIDE_BOTTOM)
{
if (radius != 0 &&
! (junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT))
{
if ((sides & SIDE_RIGHT) == 0)
cairo_new_sub_path (cr);
cairo_arc (cr, x + width - radius, y + height - radius, radius, G_PI / 4, G_PI / 2);
}
else if ((sides & SIDE_RIGHT) == 0)
cairo_move_to (cr, x + width, y + height);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_BOTTOMLEFT))
cairo_line_to (cr, x, y + height);
else
cairo_arc (cr, x + radius, y + height - radius, radius, G_PI / 2, 3 * (G_PI / 4));
}
else
cairo_move_to (cr, x, y + height);
if (sides & SIDE_LEFT)
{
if (radius != 0 &&
! (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT))
{
if ((sides & SIDE_BOTTOM) == 0)
cairo_new_sub_path (cr);
cairo_arc (cr, x + radius, y + height - radius, radius, 3 * (G_PI / 4), G_PI);
}
else if ((sides & SIDE_BOTTOM) == 0)
cairo_move_to (cr, x, y + height);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_TOPLEFT))
cairo_line_to (cr, x, y);
else
cairo_arc (cr, x + radius, y + radius, radius, G_PI, G_PI + G_PI / 4);
}
if (sides & SIDE_TOP)
{
if (radius != 0 &&
! (junction & GTK_JUNCTION_CORNER_TOPLEFT))
{
if ((sides & SIDE_LEFT) == 0)
cairo_new_sub_path (cr);
cairo_arc (cr, x + radius, y + radius, radius, 5 * (G_PI / 4), 3 * (G_PI / 2));
}
else if ((sides & SIDE_LEFT) == 0)
cairo_move_to (cr, x, y);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_TOPRIGHT))
cairo_line_to (cr, x + width, y);
else
cairo_arc (cr, x + width - radius, y + radius, radius, 3 * (G_PI / 2), - G_PI / 4);
}
}
void
tdegtk_cairo_round_rect_inner (cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
gint radius,
guint sides,
GtkJunctionSides junction)
{
gdouble line_width;
line_width = cairo_get_line_width (cr);
/* center the rounded rectangle using line_width */
tdegtk_cairo_round_rect (cr, x + line_width / 2.0,
y + line_width / 2.0,
width - line_width,
height - line_width,
radius, sides, junction);
}
void
tdegtk_cairo_set_source_border (GtkThemingEngine *engine,
cairo_t *cr,
gdouble width,
gdouble height)
{
GdkRGBA border_color;
GtkBorderStyle border_style;
GtkStateFlags state;
cairo_pattern_t *border_pat;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"border-style", &border_style,
NULL);
gtk_theming_engine_get_border_color (engine, state, &border_color);
if (border_pat)
{
/* pattern */
cairo_scale (cr, width, height);
cairo_set_source (cr, border_pat);
cairo_scale (cr, 1.0 / width, 1.0 / height);
}
else
/* one color */
gdk_cairo_set_source_rgba (cr, &border_color);
if (border_pat != NULL)
cairo_pattern_destroy (border_pat);
}
void
tdegtk_cairo_set_source_inner_stroke (GtkThemingEngine *engine,
cairo_t *cr,
gdouble width,
gdouble height)
{
GdkRGBA *inner_stroke_color;
GtkStateFlags state;
cairo_pattern_t *inner_stroke_pat;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"-tdegtk-inner-stroke-color", &inner_stroke_color,
"-tdegtk-inner-stroke-gradient", &inner_stroke_pat,
NULL);
if (inner_stroke_pat)
{
/* pattern */
cairo_scale (cr, width, height);
cairo_set_source (cr, inner_stroke_pat);
cairo_scale (cr, 1.0 / width, 1.0 / height);
}
else
/* one color */
gdk_cairo_set_source_rgba (cr, inner_stroke_color);
if (inner_stroke_pat != NULL)
cairo_pattern_destroy (inner_stroke_pat);
gdk_rgba_free (inner_stroke_color);
}