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authorMirco Müller <mirco.mueller@ubuntu.com>2010-07-06 13:47:31 +0200
committerMirco Müller <mirco.mueller@ubuntu.com>2010-07-06 13:47:31 +0200
commitf015c04d1e44c59ab650fe9f118bcf633833a150 (patch)
treecdf40a6b7599a2223f36f4bbb531376452b7bc93
parente830c3a70e7feaa761c006c9fcbce9183686dac7 (diff)
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added some internal helpers for blurring, added more precise button-background rendering
-rw-r--r--src/play-button.c402
1 files changed, 390 insertions, 12 deletions
diff --git a/src/play-button.c b/src/play-button.c
index 76a8109..347a0bc 100644
--- a/src/play-button.c
+++ b/src/play-button.c
@@ -15,6 +15,8 @@ PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Uses code from ctk
*/
#ifdef HAVE_CONFIG_H
@@ -58,6 +60,227 @@ static void play_button_draw_previous_symbol(cairo_t* cr, double x, double y);
G_DEFINE_TYPE (PlayButton, play_button, GTK_TYPE_DRAWING_AREA);
+/// internal helper functions //////////////////////////////////////////////////
+
+static double
+_align (double val)
+{
+ double fract = val - (int) val;
+
+ if (fract != 0.5f)
+ return (double) ((int) val + 0.5f);
+ else
+ return val;
+}
+
+static inline void
+_blurinner (guchar* pixel,
+ gint* zR,
+ gint* zG,
+ gint* zB,
+ gint* zA,
+ gint alpha,
+ gint aprec,
+ gint zprec)
+{
+ gint R;
+ gint G;
+ gint B;
+ guchar A;
+
+ R = *pixel;
+ G = *(pixel + 1);
+ B = *(pixel + 2);
+ A = *(pixel + 3);
+
+ *zR += (alpha * ((R << zprec) - *zR)) >> aprec;
+ *zG += (alpha * ((G << zprec) - *zG)) >> aprec;
+ *zB += (alpha * ((B << zprec) - *zB)) >> aprec;
+ *zA += (alpha * ((A << zprec) - *zA)) >> aprec;
+
+ *pixel = *zR >> zprec;
+ *(pixel + 1) = *zG >> zprec;
+ *(pixel + 2) = *zB >> zprec;
+ *(pixel + 3) = *zA >> zprec;
+}
+
+static inline void
+_blurrow (guchar* pixels,
+ gint width,
+ gint height,
+ gint channels,
+ gint line,
+ gint alpha,
+ gint aprec,
+ gint zprec)
+{
+ gint zR;
+ gint zG;
+ gint zB;
+ gint zA;
+ gint index;
+ guchar* scanline;
+
+ scanline = &(pixels[line * width * channels]);
+
+ zR = *scanline << zprec;
+ zG = *(scanline + 1) << zprec;
+ zB = *(scanline + 2) << zprec;
+ zA = *(scanline + 3) << zprec;
+
+ for (index = 0; index < width; index ++)
+ _blurinner (&scanline[index * channels],
+ &zR,
+ &zG,
+ &zB,
+ &zA,
+ alpha,
+ aprec,
+ zprec);
+
+ for (index = width - 2; index >= 0; index--)
+ _blurinner (&scanline[index * channels],
+ &zR,
+ &zG,
+ &zB,
+ &zA,
+ alpha,
+ aprec,
+ zprec);
+}
+
+static inline void
+_blurcol (guchar* pixels,
+ gint width,
+ gint height,
+ gint channels,
+ gint x,
+ gint alpha,
+ gint aprec,
+ gint zprec)
+{
+ gint zR;
+ gint zG;
+ gint zB;
+ gint zA;
+ gint index;
+ guchar* ptr;
+
+ ptr = pixels;
+
+ ptr += x * channels;
+
+ zR = *((guchar*) ptr ) << zprec;
+ zG = *((guchar*) ptr + 1) << zprec;
+ zB = *((guchar*) ptr + 2) << zprec;
+ zA = *((guchar*) ptr + 3) << zprec;
+
+ for (index = width; index < (height - 1) * width; index += width)
+ _blurinner ((guchar*) &ptr[index * channels],
+ &zR,
+ &zG,
+ &zB,
+ &zA,
+ alpha,
+ aprec,
+ zprec);
+
+ for (index = (height - 2) * width; index >= 0; index -= width)
+ _blurinner ((guchar*) &ptr[index * channels],
+ &zR,
+ &zG,
+ &zB,
+ &zA,
+ alpha,
+ aprec,
+ zprec);
+}
+
+void
+_expblur (guchar* pixels,
+ gint width,
+ gint height,
+ gint channels,
+ gint radius,
+ gint aprec,
+ gint zprec)
+{
+ gint alpha;
+ gint row = 0;
+ gint col = 0;
+
+ if (radius < 1)
+ return;
+
+ // calculate the alpha such that 90% of
+ // the kernel is within the radius.
+ // (Kernel extends to infinity)
+ alpha = (gint) ((1 << aprec) * (1.0f - expf (-2.3f / (radius + 1.f))));
+
+ for (; row < height; row++)
+ _blurrow (pixels,
+ width,
+ height,
+ channels,
+ row,
+ alpha,
+ aprec,
+ zprec);
+
+ for(; col < width; col++)
+ _blurcol (pixels,
+ width,
+ height,
+ channels,
+ col,
+ alpha,
+ aprec,
+ zprec);
+
+ return;
+}
+
+void
+_surface_blur (cairo_surface_t* surface,
+ guint radius)
+{
+ guchar* pixels;
+ guint width;
+ guint height;
+ cairo_format_t format;
+
+ // before we mess with the surface execute any pending drawing
+ cairo_surface_flush (surface);
+
+ pixels = cairo_image_surface_get_data (surface);
+ width = cairo_image_surface_get_width (surface);
+ height = cairo_image_surface_get_height (surface);
+ format = cairo_image_surface_get_format (surface);
+
+ switch (format)
+ {
+ case CAIRO_FORMAT_ARGB32:
+ _expblur (pixels, width, height, 4, radius, 16, 7);
+ break;
+
+ case CAIRO_FORMAT_RGB24:
+ _expblur (pixels, width, height, 3, radius, 16, 7);
+ break;
+
+ case CAIRO_FORMAT_A8:
+ _expblur (pixels, width, height, 1, radius, 16, 7);
+ break;
+
+ default :
+ // do nothing
+ break;
+ }
+
+ // inform cairo we altered the surfaces contents
+ cairo_surface_mark_dirty (surface);
+}
+
+/// GObject functions //////////////////////////////////////////////////////////
static void
play_button_class_init (PlayButtonClass *klass)
@@ -97,7 +320,7 @@ static gboolean
play_button_expose (GtkWidget *button, GdkEventExpose *event)
{
cairo_t *cr;
- cr = gdk_cairo_create (button->window);
+ cr = gdk_cairo_create (button->window);
g_debug("PlayButton::Draw - width = %i", button->allocation.width);
g_debug("PlayButton::Draw - event->area.width = %i", event->area.width);
@@ -109,7 +332,7 @@ play_button_expose (GtkWidget *button, GdkEventExpose *event)
cairo_clip(cr);
draw (button, cr);
- cairo_destroy (cr);
+ cairo_destroy (cr);
return FALSE;
}
@@ -126,34 +349,189 @@ play_button_set_style(GtkWidget* button, GtkStyle* style)
}
static void
-draw (GtkWidget* button, cairo_t *cr)
+draw_gradient (cairo_t* cr,
+ double x,
+ double y,
+ double w,
+ double r,
+ double* rgba_start,
+ double* rgba_end)
{
+ cairo_pattern_t* pattern = NULL;
+ cairo_move_to (cr, x, y);
+ cairo_line_to (cr, x + w - 2.0f * r, y);
+ cairo_arc (cr,
+ x + w - 2.0f * r,
+ y + r,
+ r,
+ -90.0f * G_PI / 180.0f,
+ 90.0f * G_PI / 180.0f);
+ cairo_line_to (cr, x, y + 2.0f * r);
+ cairo_arc (cr,
+ x,
+ y + r,
+ r,
+ 90.0f * G_PI / 180.0f,
+ 270.0f * G_PI / 180.0f);
+ cairo_close_path (cr);
+
+ pattern = cairo_pattern_create_linear (x, y, x, y + 2.0f * r);
+ cairo_pattern_add_color_stop_rgba (pattern,
+ 0.0f,
+ rgba_start[0],
+ rgba_start[1],
+ rgba_start[2],
+ rgba_start[3]);
+ cairo_pattern_add_color_stop_rgba (pattern,
+ 1.0f,
+ rgba_end[0],
+ rgba_end[1],
+ rgba_end[2],
+ rgba_end[3]);
+ cairo_set_source (cr, pattern);
+ cairo_fill (cr);
+ cairo_pattern_destroy (pattern);
+}
+
+static void
+draw_circle (cairo_t* cr,
+ double x,
+ double y,
+ double r,
+ double* rgba_start,
+ double* rgba_end)
+{
+ cairo_pattern_t* pattern = NULL;
+
+ cairo_move_to (cr, x, y);
+ cairo_arc (cr,
+ x + r,
+ y + r,
+ r,
+ 0.0f * G_PI / 180.0f,
+ 360.0f * G_PI / 180.0f);
+
+ pattern = cairo_pattern_create_linear (x, y, x, y + 2.0f * r);
+ cairo_pattern_add_color_stop_rgba (pattern,
+ 0.0f,
+ rgba_start[0],
+ rgba_start[1],
+ rgba_start[2],
+ rgba_start[3]);
+ cairo_pattern_add_color_stop_rgba (pattern,
+ 1.0f,
+ rgba_end[0],
+ rgba_end[1],
+ rgba_end[2],
+ rgba_end[3]);
+ cairo_set_source (cr, pattern);
+ cairo_fill (cr);
+ cairo_pattern_destroy (pattern);
+}
+
+static void
+draw (GtkWidget* button, cairo_t *cr)
+{
//PlayButtonPrivate* priv = PLAY_BUTTON_GET_PRIVATE(button);
- double rect_width = 115;
- double rect_height = 28;
- double p_radius = 21;
+ double rect_width = 130;
double y = 15;
double x = 22;
+ double inner_height = 25.0f;
+ double inner_radius = 12.5f;
+ double inner_start[] = {229.0f / 255.0f,
+ 223.0f / 255.0f,
+ 215.0f / 255.0f,
+ 1.0f};
+ double inner_end[] = {183.0f / 255.0f,
+ 178.0f / 255.0f,
+ 172.0f / 255.0f,
+ 1.0f};
+ double middle_height = 27.0f;
+ double middle_radius = 13.5f;
+ double middle_start[] = {61.0f / 255.0f,
+ 60.0f / 255.0f,
+ 57.0f / 255.0f,
+ 1.0f};
+ double middle_end[] = {94.0f / 255.0f,
+ 93.0f / 255.0f,
+ 90.0f / 255.0f,
+ 1.0f};
+ double outter_height = 29.0f;
+ double outter_radius = 14.5f;
+ double outter_start[] = {36.0f / 255.0f,
+ 35.0f / 255.0f,
+ 33.0f / 255.0f,
+ 1.0f};
+ double outter_end[] = {123.0f / 255.0f,
+ 123.0f / 255.0f,
+ 120.0f / 255.0f,
+ 1.0f};
+
+ double circle_radius = 19.0f;
+
//double radius=35;
//double x= button->allocation.width/2 - rect_width/2;
//double y= button->allocation.height/2 -rect_height/2;
+ // ffwd/back-background
+ draw_gradient (cr,
+ x,
+ y,
+ rect_width,
+ outter_radius,
+ outter_start,
+ outter_end);
+ draw_gradient (cr,
+ x,
+ y + 1,
+ rect_width - 2,
+ middle_radius,
+ middle_start,
+ middle_end);
+ draw_gradient (cr,
+ x,
+ y + 2,
+ rect_width - 4,
+ inner_radius,
+ inner_start,
+ inner_end);
+
+ // play/pause-background
+ draw_circle (cr,
+ x + rect_width / 2.0f - 2.0f * outter_radius - 4.5f,
+ y - ((circle_radius - outter_radius)),
+ circle_radius,
+ outter_start,
+ outter_end);
+ draw_circle (cr,
+ x + rect_width / 2.0f - 2.0f * outter_radius - 4.5f + 1.0f,
+ y - ((circle_radius - outter_radius)) + 1.0f,
+ circle_radius - 1,
+ middle_start,
+ middle_end);
+ draw_circle (cr,
+ x + rect_width / 2.0f - 2.0f * outter_radius - 4.5f + 2.0f,
+ y - ((circle_radius - outter_radius)) + 2.0f,
+ circle_radius - 2.0f,
+ inner_start,
+ inner_end);
+
// Draw the outside drop shadow background
- play_button_draw_background_shadow_1(button, cr, x, y, rect_width, rect_height, p_radius);
+ //play_button_draw_background_shadow_1(button, cr, x, y, rect_width, rect_height, p_radius);
// Draw the inside drop shadow background
- gint offset = 4;
- play_button_draw_background_shadow_2(button, cr, x + offset-1, y + offset/2, rect_width-offset, rect_height-offset, p_radius-(offset/2));
+ /*gint offset = 4;
+ play_button_draw_background_shadow_2(button, cr, x + offset-1, y + offset/2, rect_width-offset, rect_height-offset, p_radius-(offset/2));*/
- offset = 5;
+ //offset = 5;
// Draw the inside actual background
- play_button_draw_background(button, cr, x+offset-1, y + offset/2+1, rect_width-offset, rect_height-offset, p_radius-offset/2);
+ /*play_button_draw_background(button, cr, x+offset-1, y + offset/2+1, rect_width-offset, rect_height-offset, p_radius-offset/2);
play_button_draw_pause_symbol(cr, rect_width/2 + rect_height/10 + x -1 + offset/2, rect_height/5 +y );
play_button_draw_pause_symbol(cr, rect_width/2 + rect_height/10 + x + offset/2 + 10, rect_height/5 +y );
- play_button_draw_previous_symbol(cr, x+rect_height/2 + offset, y + offset+2);
+ play_button_draw_previous_symbol(cr, x+rect_height/2 + offset, y + offset+2);*/
cairo_surface_write_to_png(cairo_get_target (cr), "/tmp/foobar.png");
}