diff options
Diffstat (limited to 'gtk/gtkhsv.c')
| -rw-r--r-- | gtk/gtkhsv.c | 2243 |
1 files changed, 1174 insertions, 1069 deletions
diff --git a/gtk/gtkhsv.c b/gtk/gtkhsv.c index 568a14089..8ca57b66f 100644 --- a/gtk/gtkhsv.c +++ b/gtk/gtkhsv.c @@ -26,7 +26,12 @@ #include "gtksignal.h" #include "gtkhsv.h" - +/* + * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS + * file for a list of people on the GTK+ Team. See the ChangeLog + * files for a list of changes. These files are distributed with + * GTK+ at ftp://ftp.gtk.org/pub/gtk/. + */ /* Default width/height */ #define DEFAULT_SIZE 100 @@ -34,34 +39,33 @@ /* Default ring width */ #define DEFAULT_RING_WIDTH 10 - /* Dragging modes */ typedef enum { - DRAG_NONE, - DRAG_H, - DRAG_SV + DRAG_NONE, + DRAG_H, + DRAG_SV } DragMode; /* Private part of the GtkHSV structure */ typedef struct { - /* Color value */ - double h; - double s; - double v; - - /* Size and ring width */ - int size; - int ring_width; - - /* Window for capturing events */ - GdkWindow *window; - - /* GC for drawing */ - GdkGC *gc; - - /* Dragging mode */ - DragMode mode; + /* Color value */ + double h; + double s; + double v; + + /* Size and ring width */ + int size; + int ring_width; + + /* Window for capturing events */ + GdkWindow *window; + + /* GC for drawing */ + GdkGC *gc; + + /* Dragging mode */ + DragMode mode; } HSVPrivate; @@ -69,30 +73,33 @@ typedef struct { /* Signal IDs */ enum { - CHANGED, - LAST_SIGNAL + CHANGED, + LAST_SIGNAL }; -static void gtk_hsv_class_init (GtkHSVClass *class); -static void gtk_hsv_init (GtkHSV *hsv); -static void gtk_hsv_destroy (GtkObject *object); - -static void gtk_hsv_map (GtkWidget *widget); -static void gtk_hsv_unmap (GtkWidget *widget); -static void gtk_hsv_realize (GtkWidget *widget); -static void gtk_hsv_unrealize (GtkWidget *widget); -static void gtk_hsv_size_request (GtkWidget *widget, GtkRequisition *requisition); -static void gtk_hsv_size_allocate (GtkWidget *widget, GtkAllocation *allocation); -static gint gtk_hsv_button_press (GtkWidget *widget, GdkEventButton *event); -static gint gtk_hsv_button_release (GtkWidget *widget, GdkEventButton *event); -static gint gtk_hsv_motion (GtkWidget *widget, GdkEventMotion *event); -static gint gtk_hsv_expose (GtkWidget *widget, GdkEventExpose *event); +static void gtk_hsv_class_init (GtkHSVClass *class); +static void gtk_hsv_init (GtkHSV *hsv); +static void gtk_hsv_destroy (GtkObject *object); +static void gtk_hsv_map (GtkWidget *widget); +static void gtk_hsv_unmap (GtkWidget *widget); +static void gtk_hsv_realize (GtkWidget *widget); +static void gtk_hsv_unrealize (GtkWidget *widget); +static void gtk_hsv_size_request (GtkWidget *widget, + GtkRequisition *requisition); +static void gtk_hsv_size_allocate (GtkWidget *widget, + GtkAllocation *allocation); +static gint gtk_hsv_button_press (GtkWidget *widget, + GdkEventButton *event); +static gint gtk_hsv_button_release (GtkWidget *widget, + GdkEventButton *event); +static gint gtk_hsv_motion (GtkWidget *widget, + GdkEventMotion *event); +static gint gtk_hsv_expose (GtkWidget *widget, + GdkEventExpose *event); static guint hsv_signals[LAST_SIGNAL]; - static GtkWidgetClass *parent_class; - /** * gtk_hsv_get_type: @@ -106,241 +113,239 @@ static GtkWidgetClass *parent_class; GtkType gtk_hsv_get_type (void) { - static GtkType hsv_type = 0; - - if (!hsv_type) { - static const GtkTypeInfo hsv_info = { - "GtkHSV", - sizeof (GtkHSV), - sizeof (GtkHSVClass), - (GtkClassInitFunc) gtk_hsv_class_init, - (GtkObjectInitFunc) gtk_hsv_init, - NULL, /* reserved_1 */ - NULL, /* reserved_2 */ - (GtkClassInitFunc) NULL - }; - - hsv_type = gtk_type_unique (gtk_widget_get_type (), &hsv_info); - } - - return hsv_type; + static GtkType hsv_type = 0; + + if (!hsv_type) { + static const GtkTypeInfo hsv_info = { + "GtkHSV", + sizeof (GtkHSV), + sizeof (GtkHSVClass), + (GtkClassInitFunc) gtk_hsv_class_init, + (GtkObjectInitFunc) gtk_hsv_init, + NULL, /* reserved_1 */ + NULL, /* reserved_2 */ + (GtkClassInitFunc) NULL + }; + + hsv_type = gtk_type_unique (GTK_TYPE_WIDGET, &hsv_info); + } + + return hsv_type; } /* Class initialization function for the HSV color selector */ static void gtk_hsv_class_init (GtkHSVClass *class) { - GtkObjectClass *object_class; - GtkWidgetClass *widget_class; - - object_class = (GtkObjectClass *) class; - widget_class = (GtkWidgetClass *) class; - - parent_class = gtk_type_class (gtk_widget_get_type ()); - - hsv_signals[CHANGED] = - gtk_signal_new ("changed", - GTK_RUN_FIRST, - object_class->type, - GTK_SIGNAL_OFFSET (GtkHSVClass, changed), - gtk_marshal_NONE__NONE, - GTK_TYPE_NONE, 0); - - gtk_object_class_add_signals (object_class, hsv_signals, LAST_SIGNAL); - - object_class->destroy = gtk_hsv_destroy; - - widget_class->map = gtk_hsv_map; - widget_class->unmap = gtk_hsv_unmap; - widget_class->realize = gtk_hsv_realize; - widget_class->unrealize = gtk_hsv_unrealize; - widget_class->size_request = gtk_hsv_size_request; - widget_class->size_allocate = gtk_hsv_size_allocate; - widget_class->button_press_event = gtk_hsv_button_press; - widget_class->button_release_event = gtk_hsv_button_release; - widget_class->motion_notify_event = gtk_hsv_motion; - widget_class->expose_event = gtk_hsv_expose; + GtkObjectClass *object_class; + GtkWidgetClass *widget_class; + + object_class = (GtkObjectClass *) class; + widget_class = (GtkWidgetClass *) class; + + parent_class = gtk_type_class (GTK_TYPE_WIDGET); + + hsv_signals[CHANGED] = + gtk_signal_new ("changed", + GTK_RUN_FIRST, + GTK_CLASS_TYPE (object_class), + GTK_SIGNAL_OFFSET (GtkHSVClass, changed), + gtk_marshal_NONE__NONE, + GTK_TYPE_NONE, 0); + gtk_object_class_add_signals (object_class, hsv_signals, LAST_SIGNAL); + + object_class->destroy = gtk_hsv_destroy; + + widget_class->map = gtk_hsv_map; + widget_class->unmap = gtk_hsv_unmap; + widget_class->realize = gtk_hsv_realize; + widget_class->unrealize = gtk_hsv_unrealize; + widget_class->size_request = gtk_hsv_size_request; + widget_class->size_allocate = gtk_hsv_size_allocate; + widget_class->button_press_event = gtk_hsv_button_press; + widget_class->button_release_event = gtk_hsv_button_release; + widget_class->motion_notify_event = gtk_hsv_motion; + widget_class->expose_event = gtk_hsv_expose; } /* Object initialization function for the HSV color selector */ static void gtk_hsv_init (GtkHSV *hsv) { - HSVPrivate *priv; - - priv = g_new0 (HSVPrivate, 1); - hsv->priv = priv; - - GTK_WIDGET_SET_FLAGS (hsv, GTK_NO_WINDOW); - - priv->h = 0.0; - priv->s = 0.0; - priv->v = 0.0; - - priv->size = DEFAULT_SIZE; - priv->ring_width = DEFAULT_RING_WIDTH; + HSVPrivate *priv; + + priv = g_new0 (HSVPrivate, 1); + hsv->priv = priv; + + GTK_WIDGET_SET_FLAGS (hsv, GTK_NO_WINDOW); + + priv->h = 0.0; + priv->s = 0.0; + priv->v = 0.0; + + priv->size = DEFAULT_SIZE; + priv->ring_width = DEFAULT_RING_WIDTH; } /* Destroy handler for the HSV color selector */ static void gtk_hsv_destroy (GtkObject *object) { - GtkHSV *hsv; - HSVPrivate *priv; - - g_return_if_fail (object != NULL); - g_return_if_fail (GTK_IS_HSV (object)); - - hsv = GTK_HSV (object); - priv = hsv->priv; - - g_free (priv); - - if (GTK_OBJECT_CLASS (parent_class)->destroy) - (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); + GtkHSV *hsv; + + g_return_if_fail (GTK_IS_HSV (object)); + + hsv = GTK_HSV (object); + + if (hsv->priv) + { + g_free (hsv->priv); + hsv->priv = NULL; + } + + GTK_OBJECT_CLASS (parent_class)->destroy (object); } - - /* Default signal handlers */ /* Map handler for the HSV color selector */ static void gtk_hsv_map (GtkWidget *widget) { - GtkHSV *hsv; - HSVPrivate *priv; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - if (GTK_WIDGET_MAPPED (widget)) - return; - - GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED); - - gdk_window_show (priv->window); + GtkHSV *hsv; + HSVPrivate *priv; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + if (GTK_WIDGET_MAPPED (widget)) + return; + + GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED); + + gdk_window_show (priv->window); } /* Unmap handler for the HSV color selector */ static void gtk_hsv_unmap (GtkWidget *widget) { - GtkHSV *hsv; - HSVPrivate *priv; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - if (!GTK_WIDGET_MAPPED (widget)) - return; - - GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED); - - gdk_window_hide (priv->window); + GtkHSV *hsv; + HSVPrivate *priv; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + if (!GTK_WIDGET_MAPPED (widget)) + return; + + GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED); + + gdk_window_hide (priv->window); } /* Realize handler for the HSV color selector */ static void gtk_hsv_realize (GtkWidget *widget) { - GtkHSV *hsv; - HSVPrivate *priv; - GdkWindowAttr attr; - int attr_mask; - GdkWindow *parent_window; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); - - /* Create window */ - - attr.window_type = GDK_WINDOW_CHILD; - attr.x = widget->allocation.x; - attr.y = widget->allocation.y; - attr.width = widget->allocation.width; - attr.height = widget->allocation.height; - attr.wclass = GDK_INPUT_ONLY; - attr.event_mask = gtk_widget_get_events (widget); - attr.event_mask |= (GDK_BUTTON_PRESS_MASK - | GDK_BUTTON_RELEASE_MASK - | GDK_POINTER_MOTION_MASK); - - attr_mask = GDK_WA_X | GDK_WA_Y; - - parent_window = gtk_widget_get_parent_window (widget); - - widget->window = parent_window; - gdk_window_ref (widget->window); - - priv->window = gdk_window_new (parent_window, &attr, attr_mask); - gdk_window_set_user_data (priv->window, hsv); - - widget->style = gtk_style_attach (widget->style, widget->window); - - /* Create GC */ - - priv->gc = gdk_gc_new (parent_window); + GtkHSV *hsv; + HSVPrivate *priv; + GdkWindowAttr attr; + int attr_mask; + GdkWindow *parent_window; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); + + /* Create window */ + + attr.window_type = GDK_WINDOW_CHILD; + attr.x = widget->allocation.x; + attr.y = widget->allocation.y; + attr.width = widget->allocation.width; + attr.height = widget->allocation.height; + attr.wclass = GDK_INPUT_ONLY; + attr.event_mask = gtk_widget_get_events (widget); + attr.event_mask |= (GDK_BUTTON_PRESS_MASK + | GDK_BUTTON_RELEASE_MASK + | GDK_POINTER_MOTION_MASK); + + attr_mask = GDK_WA_X | GDK_WA_Y; + + parent_window = gtk_widget_get_parent_window (widget); + + widget->window = parent_window; + gdk_window_ref (widget->window); + + priv->window = gdk_window_new (parent_window, &attr, attr_mask); + gdk_window_set_user_data (priv->window, hsv); + + widget->style = gtk_style_attach (widget->style, widget->window); + + /* Create GC */ + + priv->gc = gdk_gc_new (parent_window); } /* Unrealize handler for the HSV color selector */ static void gtk_hsv_unrealize (GtkWidget *widget) { - GtkHSV *hsv; - HSVPrivate *priv; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - gdk_window_set_user_data (priv->window, NULL); - gdk_window_destroy (priv->window); - priv->window = NULL; - - gdk_gc_unref (priv->gc); - priv->gc = NULL; - - if (GTK_WIDGET_CLASS (parent_class)->unrealize) - (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget); + GtkHSV *hsv; + HSVPrivate *priv; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + gdk_window_set_user_data (priv->window, NULL); + gdk_window_destroy (priv->window); + priv->window = NULL; + + gdk_gc_unref (priv->gc); + priv->gc = NULL; + + if (GTK_WIDGET_CLASS (parent_class)->unrealize) + GTK_WIDGET_CLASS (parent_class)->unrealize (widget); } /* Size_request handler for the HSV color selector */ static void -gtk_hsv_size_request (GtkWidget *widget, GtkRequisition *requisition) +gtk_hsv_size_request (GtkWidget *widget, + GtkRequisition *requisition) { - GtkHSV *hsv; - HSVPrivate *priv; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - requisition->width = priv->size; - requisition->height = priv->size; + GtkHSV *hsv; + HSVPrivate *priv; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + requisition->width = priv->size; + requisition->height = priv->size; } /* Size_allocate handler for the HSV color selector */ static void -gtk_hsv_size_allocate (GtkWidget *widget, GtkAllocation *allocation) +gtk_hsv_size_allocate (GtkWidget *widget, + GtkAllocation *allocation) { - GtkHSV *hsv; - HSVPrivate *priv; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - widget->allocation = *allocation; - - if (GTK_WIDGET_REALIZED (widget)) - gdk_window_move_resize (priv->window, - allocation->x, - allocation->y, - allocation->width, - allocation->height); + GtkHSV *hsv; + HSVPrivate *priv; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + widget->allocation = *allocation; + + if (GTK_WIDGET_REALIZED (widget)) + gdk_window_move_resize (priv->window, + allocation->x, + allocation->y, + allocation->width, + allocation->height); } - /* Utility functions */ @@ -348,588 +353,647 @@ gtk_hsv_size_allocate (GtkWidget *widget, GtkAllocation *allocation) /* Converts from HSV to RGB */ static void -hsv_to_rgb (double *h, double *s, double *v) +hsv_to_rgb (gdouble *h, + gdouble *s, + gdouble *v) { - double hue, saturation, value; - double f, p, q, t; - - if (*s == 0.0) { - *h = *v; - *s = *v; - *v = *v; /* heh */ - } else { - hue = *h * 6.0; - saturation = *s; - value = *v; - - if (hue == 6.0) - hue = 0.0; - - f = hue - (int) hue; - p = value * (1.0 - saturation); - q = value * (1.0 - saturation * f); - t = value * (1.0 - saturation * (1.0 - f)); - - switch ((int) hue) { - case 0: - *h = value; - *s = t; - *v = p; - break; - - case 1: - *h = q; - *s = value; - *v = p; - break; - - case 2: - *h = p; - *s = value; - *v = t; - break; - - case 3: - *h = p; - *s = q; - *v = value; - break; - - case 4: - *h = t; - *s = p; - *v = value; - break; - - case 5: - *h = value; - *s = p; - *v = q; - break; - - default: - g_assert_not_reached (); - } + gdouble hue, saturation, value; + gdouble f, p, q, t; + + if (*s == 0.0) + { + *h = *v; + *s = *v; + *v = *v; /* heh */ + } + else + { + hue = *h * 6.0; + saturation = *s; + value = *v; + + if (hue == 6.0) + hue = 0.0; + + f = hue - (int) hue; + p = value * (1.0 - saturation); + q = value * (1.0 - saturation * f); + t = value * (1.0 - saturation * (1.0 - f)); + + switch ((int) hue) + { + case 0: + *h = value; + *s = t; + *v = p; + break; + + case 1: + *h = q; + *s = value; + *v = p; + break; + + case 2: + *h = p; + *s = value; + *v = t; + break; + + case 3: + *h = p; + *s = q; + *v = value; + break; + + case 4: + *h = t; + *s = p; + *v = value; + break; + + case 5: + *h = value; + *s = p; + *v = q; + break; + + default: + g_assert_not_reached (); } + } } /* Converts from RGB to HSV */ static void -rgb_to_hsv (double *r, double *g, double *b) +rgb_to_hsv (gdouble *r, + gdouble *g, + gdouble *b) { - double red, green, blue; - double h, s, v; - double min, max; - double delta; - - red = *r; - green = *g; - blue = *b; - - h = 0.0; - - if (red > green) { - if (red > blue) - max = red; - else - max = blue; - - if (green < blue) - min = green; - else - min = blue; - } else { - if (green > blue) - max = green; - else - max = blue; - - if (red < blue) - min = red; - else - min = blue; - } - - v = max; - - if (max != 0.0) - s = (max - min) / max; - else - s = 0.0; - - if (s == 0.0) - h = 0.0; - else { - delta = max - min; - - if (red == max) - h = (green - blue) / delta; - else if (green == max) - h = 2 + (blue - red) / delta; - else if (blue == max) - h = 4 + (red - green) / delta; - - h /= 6.0; - - if (h < 0.0) - h += 1.0; - else if (h > 1.0) - h -= 1.0; - } - - *r = h; - *g = s; - *b = v; + gdouble red, green, blue; + gdouble h, s, v; + gdouble min, max; + gdouble delta; + + red = *r; + green = *g; + blue = *b; + + h = 0.0; + + if (red > green) + { + if (red > blue) + max = red; + else + max = blue; + + if (green < blue) + min = green; + else + min = blue; + } + else + { + if (green > blue) + max = green; + else + max = blue; + + if (red < blue) + min = red; + else + min = blue; + } + + v = max; + + if (max != 0.0) + s = (max - min) / max; + else + s = 0.0; + + if (s == 0.0) + h = 0.0; + else + { + delta = max - min; + + if (red == max) + h = (green - blue) / delta; + else if (green == max) + h = 2 + (blue - red) / delta; + else if (blue == max) + h = 4 + (red - green) / delta; + + h /= 6.0; + + if (h < 0.0) + h += 1.0; + else if (h > 1.0) + h -= 1.0; + } + + *r = h; + *g = s; + *b = v; } /* Computes the vertices of the saturation/value triangle */ static void -compute_triangle (GtkHSV *hsv, int *hx, int *hy, int *sx, int *sy, int *vx, int *vy) +compute_triangle (GtkHSV *hsv, + gint *hx, + gint *hy, + gint *sx, + gint *sy, + gint *vx, + gint *vy) { - HSVPrivate *priv; - double center; - double inner, outer; - double angle; - - priv = hsv->priv; - - center = priv->size / 2.0; - outer = priv->size / 2.0; - inner = outer - priv->ring_width; - angle = priv->h * 2.0 * M_PI; - - *hx = floor (center + cos (angle) * inner + 0.5); - *hy = floor (center - sin (angle) * inner + 0.5); - *sx = floor (center + cos (angle + 2.0 * M_PI / 3.0) * inner + 0.5); - *sy = floor (center - sin (angle + 2.0 * M_PI / 3.0) * inner + 0.5); - *vx = floor (center + cos (angle + 4.0 * M_PI / 3.0) * inner + 0.5); - *vy = floor (center - sin (angle + 4.0 * M_PI / 3.0) * inner + 0.5); + HSVPrivate *priv; + gdouble center; + gdouble inner, outer; + gdouble angle; + + priv = hsv->priv; + + center = priv->size / 2.0; + outer = priv->size / 2.0; + inner = outer - priv->ring_width; + angle = priv->h * 2.0 * M_PI; + + *hx = floor (center + cos (angle) * inner + 0.5); + *hy = floor (center - sin (angle) * inner + 0.5); + *sx = floor (center + cos (angle + 2.0 * M_PI / 3.0) * inner + 0.5); + *sy = floor (center - sin (angle + 2.0 * M_PI / 3.0) * inner + 0.5); + *vx = floor (center + cos (angle + 4.0 * M_PI / 3.0) * inner + 0.5); + *vy = floor (center - sin (angle + 4.0 * M_PI / 3.0) * inner + 0.5); } /* Computes whether a point is inside the hue ring */ static gboolean -is_in_ring (GtkHSV *hsv, double x, double y) +is_in_ring (GtkHSV *hsv, + gdouble x, + gdouble y) { - HSVPrivate *priv; - double dx, dy, dist; - double center, inner, outer; - - priv = hsv->priv; - - center = priv->size / 2.0; - outer = priv->size / 2.0; - inner = outer - priv->ring_width; - - dx = x - center; - dy = center - y; - dist = dx * dx + dy * dy; - - return (dist >= inner * inner && dist <= outer * outer); + HSVPrivate *priv; + gdouble dx, dy, dist; + gdouble center, inner, outer; + + priv = hsv->priv; + + center = priv->size / 2.0; + outer = priv->size / 2.0; + inner = outer - priv->ring_width; + + dx = x - center; + dy = center - y; + dist = dx * dx + dy * dy; + + return (dist >= inner * inner && dist <= outer * outer); } /* Computes a saturation/value pair based on the mouse coordinates */ static void -compute_sv (GtkHSV *hsv, double x, double y, double *s, double *v) +compute_sv (GtkHSV *hsv, + gdouble x, + gdouble y, + gdouble *s, + gdouble *v) { - HSVPrivate *priv; - int ihx, ihy, isx, isy, ivx, ivy; - double hx, hy, sx, sy, vx, vy; - double center; - - priv = hsv->priv; - - compute_triangle (hsv, &ihx, &ihy, &isx, &isy, &ivx, &ivy); - center = priv->size / 2.0; - hx = ihx - center; - hy = center - ihy; - sx = isx - center; - sy = center - isy; - vx = ivx - center; - vy = center - ivy; - x -= center; - y = center - y; - - if (vx * (x - sx) + vy * (y - sy) < 0.0) { - *s = 1.0; - *v = (((x - sx) * (hx - sx) + (y - sy) * (hy-sy)) - / ((hx - sx) * (hx - sx) + (hy - sy) * (hy - sy))); - - if (*v < 0.0) - *v = 0.0; - else if (*v > 1.0) - *v = 1.0; - } else if (hx * (x - sx) + hy * (y - sy) < 0.0) { - *s = 0.0; - *v = (((x - sx) * (vx - sx) + (y - sy) * (vy - sy)) - / ((vx - sx) * (vx - sx) + (vy - sy) * (vy - sy))); - - if (*v < 0.0) - *v = 0.0; - else if (*v > 1.0) - *v = 1.0; - } else if (sx * (x - hx) + sy * (y - hy) < 0.0) { - *v = 1.0; - *s = (((x - vx) * (hx - vx) + (y - vy) * (hy - vy)) / - ((hx - vx) * (hx - vx) + (hy - vy) * (hy - vy))); - - if (*s < 0.0) - *s = 0.0; - else if (*s > 1.0) - *s = 1.0; - } else { - *v = (((x - sx) * (hy - vy) - (y - sy) * (hx - vx)) - / ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx))); - - if (*v<= 0.0) { - *v = 0.0; - *s = 0.0; - } else { - if (*v > 1.0) - *v = 1.0; - - *s = (y - sy - *v * (vy - sy)) / (*v * (hy - vy)); - if (*s < 0.0) - *s = 0.0; - else if (*s > 1.0) - *s = 1.0; - } + HSVPrivate *priv; + int ihx, ihy, isx, isy, ivx, ivy; + double hx, hy, sx, sy, vx, vy; + double center; + + priv = hsv->priv; + + compute_triangle (hsv, &ihx, &ihy, &isx, &isy, &ivx, &ivy); + center = priv->size / 2.0; + hx = ihx - center; + hy = center - ihy; + sx = isx - center; + sy = center - isy; + vx = ivx - center; + vy = center - ivy; + x -= center; + y = center - y; + + if (vx * (x - sx) + vy * (y - sy) < 0.0) + { + *s = 1.0; + *v = (((x - sx) * (hx - sx) + (y - sy) * (hy-sy)) + / ((hx - sx) * (hx - sx) + (hy - sy) * (hy - sy))); + + if (*v < 0.0) + *v = 0.0; + else if (*v > 1.0) + *v = 1.0; + } + else if (hx * (x - sx) + hy * (y - sy) < 0.0) + { + *s = 0.0; + *v = (((x - sx) * (vx - sx) + (y - sy) * (vy - sy)) + / ((vx - sx) * (vx - sx) + (vy - sy) * (vy - sy))); + + if (*v < 0.0) + *v = 0.0; + else if (*v > 1.0) + *v = 1.0; + } + else if (sx * (x - hx) + sy * (y - hy) < 0.0) + { + *v = 1.0; + *s = (((x - vx) * (hx - vx) + (y - vy) * (hy - vy)) / + ((hx - vx) * (hx - vx) + (hy - vy) * (hy - vy))); + + if (*s < 0.0) + *s = 0.0; + else if (*s > 1.0) + *s = 1.0; + } + else + { + *v = (((x - sx) * (hy - vy) - (y - sy) * (hx - vx)) + / ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx))); + + if (*v<= 0.0) + { + *v = 0.0; + *s = 0.0; + } + else + { + if (*v > 1.0) + *v = 1.0; + + *s = (y - sy - *v * (vy - sy)) / (*v * (hy - vy)); + if (*s < 0.0) + *s = 0.0; + else if (*s > 1.0) + *s = 1.0; } + } } /* Computes whether a point is inside the saturation/value triangle */ static gboolean -is_in_triangle (GtkHSV *hsv, double x, double y) +is_in_triangle (GtkHSV *hsv, + gdouble x, + gdouble y) { - int hx, hy, sx, sy, vx, vy; - double det, s, v; - - compute_triangle (hsv, &hx, &hy, &sx, &sy, &vx, &vy); - - det = (vx - sx) * (hy - sy) - (vy - sy) * (hx - sx); - - s = ((x - sx) * (hy - sy) - (y - sy) * (hx - sx)) / det; - v = ((vx - sx) * (y - sy) - (vy - sy) * (x - sx)) / det; - - return (s >= 0.0 && v >= 0.0 && s + v <= 1.0); + int hx, hy, sx, sy, vx, vy; + double det, s, v; + + compute_triangle (hsv, &hx, &hy, &sx, &sy, &vx, &vy); + + det = (vx - sx) * (hy - sy) - (vy - sy) * (hx - sx); + + s = ((x - sx) * (hy - sy) - (y - sy) * (hx - sx)) / det; + v = ((vx - sx) * (y - sy) - (vy - sy) * (x - sx)) / det; + + return (s >= 0.0 && v >= 0.0 && s + v <= 1.0); } /* Computes a value based on the mouse coordinates */ static double -compute_v (GtkHSV *hsv, double x, double y) +compute_v (GtkHSV *hsv, + gdouble x, + gdouble y) { - HSVPrivate *priv; - double center; - double dx, dy; - double angle; - - priv = hsv->priv; - - center = priv->size / 2.0; - dx = x - center; - dy = center - y; - - angle = atan2 (dy, dx); - if (angle < 0.0) - angle += 2.0 * M_PI; - - return angle / (2.0 * M_PI); + HSVPrivate *priv; + double center; + double dx, dy; + double angle; + + priv = hsv->priv; + + center = priv->size / 2.0; + dx = x - center; + dy = center - y; + + angle = atan2 (dy, dx); + if (angle < 0.0) + angle += 2.0 * M_PI; + + return angle / (2.0 * M_PI); } - - /* Event handlers */ static void -set_cross_grab (GtkHSV *hsv, guint32 time) +set_cross_grab (GtkHSV *hsv, + guint32 time) { - HSVPrivate *priv; - GdkCursor *cursor; - - priv = hsv->priv; - - cursor = gdk_cursor_new (GDK_CROSSHAIR); - gdk_pointer_grab (priv->window, FALSE, - (GDK_POINTER_MOTION_MASK - | GDK_POINTER_MOTION_HINT_MASK - | GDK_BUTTON_RELEASE_MASK), - NULL, - cursor, - time); - gdk_cursor_destroy (cursor); - + HSVPrivate *priv; + GdkCursor *cursor; + + priv = hsv->priv; + + cursor = gdk_cursor_new (GDK_CROSSHAIR); + gdk_pointer_grab (priv->window, FALSE, + (GDK_POINTER_MOTION_MASK + | GDK_POINTER_MOTION_HINT_MASK + | GDK_BUTTON_RELEASE_MASK), + NULL, + cursor, + time); + gdk_cursor_destroy (cursor); } /* Button_press_event handler for the HSV color selector */ static gint -gtk_hsv_button_press (GtkWidget *widget, GdkEventButton *event) +gtk_hsv_button_press (GtkWidget *widget, + GdkEventButton *event) { - GtkHSV *hsv; - HSVPrivate *priv; - double x, y; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - if (priv->mode != DRAG_NONE || event->button != 1) - return FALSE; - - x = event->x; - y = event->y; - - if (is_in_ring (hsv, x, y)) { - priv->mode = DRAG_H; - set_cross_grab (hsv, event->time); - - gtk_hsv_set_color (hsv, - compute_v (hsv, x, y), - priv->s, - priv->v); - - return TRUE; - } - - if (is_in_triangle (hsv, x, y)) { - double s, v; - - priv->mode = DRAG_SV; - set_cross_grab (hsv, event->time); - - compute_sv (hsv, x, y, &s, &v); - gtk_hsv_set_color (hsv, priv->h, s, v); - return TRUE; - } - - return FALSE; + GtkHSV *hsv; + HSVPrivate *priv; + double x, y; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + if (priv->mode != DRAG_NONE || event->button != 1) + return FALSE; + + x = event->x; + y = event->y; + + if (is_in_ring (hsv, x, y)) + { + priv->mode = DRAG_H; + set_cross_grab (hsv, event->time); + + gtk_hsv_set_color (hsv, + compute_v (hsv, x, y), + priv->s, + priv->v); + + return TRUE; + } + + if (is_in_triangle (hsv, x, y)) + { + gdouble s, v; + + priv->mode = DRAG_SV; + set_cross_grab (hsv, event->time); + + compute_sv (hsv, x, y, &s, &v); + gtk_hsv_set_color (hsv, priv->h, s, v); + return TRUE; + } + + return FALSE; } /* Button_release_event handler for the HSV color selector */ static gint -gtk_hsv_button_release (GtkWidget *widget, GdkEventButton *event) +gtk_hsv_button_release (GtkWidget *widget, + GdkEventButton *event) { - GtkHSV *hsv; - HSVPrivate *priv; - DragMode mode; - double x, y; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - if (priv->mode == DRAG_NONE || event->button != 1) - return FALSE; - - /* Set the drag mode to DRAG_NONE so that signal handlers for "catched" - * can see that this is the final color state. - */ - - mode = priv->mode; - priv->mode = DRAG_NONE; - - x = event->x; - y = event->y; - - if (mode == DRAG_H) - gtk_hsv_set_color (hsv, compute_v (hsv, x, y), priv->s, priv->v); - else if (mode == DRAG_SV) { - double s, v; - - compute_sv (hsv, x, y, &s, &v); - gtk_hsv_set_color (hsv, priv->h, s, v); - } else - g_assert_not_reached (); - - gdk_pointer_ungrab (event->time); - - return TRUE; + GtkHSV *hsv; + HSVPrivate *priv; + DragMode mode; + gdouble x, y; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + if (priv->mode == DRAG_NONE || event->button != 1) + return FALSE; + + /* Set the drag mode to DRAG_NONE so that signal handlers for "catched" + * can see that this is the final color state. + */ + + mode = priv->mode; + priv->mode = DRAG_NONE; + + x = event->x; + y = event->y; + + if (mode == DRAG_H) + gtk_hsv_set_color (hsv, compute_v (hsv, x, y), priv->s, priv->v); + else if (mode == DRAG_SV) { + double s, v; + + compute_sv (hsv, x, y, &s, &v); + gtk_hsv_set_color (hsv, priv->h, s, v); + } else + g_assert_not_reached (); + + gdk_pointer_ungrab (event->time); + + return TRUE; } /* Motion_notify_event handler for the HSV color selector */ static gint -gtk_hsv_motion (GtkWidget *widget, GdkEventMotion *event) +gtk_hsv_motion (GtkWidget *widget, + GdkEventMotion *event) { - GtkHSV *hsv; - HSVPrivate *priv; - double x, y; - gint ix, iy; - GdkModifierType mods; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - if (priv->mode == DRAG_NONE) - return FALSE; - - if (event->is_hint) { - gdk_window_get_pointer (priv->window, &ix, &iy, &mods); - x = ix; - y = iy; - } else { - x = event->x; - y = event->y; - } - - if (priv->mode == DRAG_H) { - gtk_hsv_set_color (hsv, compute_v (hsv, x, y), priv->s, priv->v); - return TRUE; - } else if (priv->mode == DRAG_SV) { - double s, v; - - compute_sv (hsv, x, y, &s, &v); - gtk_hsv_set_color (hsv, priv->h, s, v); - return TRUE; - } - - g_assert_not_reached (); - return FALSE; + GtkHSV *hsv; + HSVPrivate *priv; + double x, y; + gint ix, iy; + GdkModifierType mods; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + if (priv->mode == DRAG_NONE) + return FALSE; + + if (event->is_hint) + { + gdk_window_get_pointer (priv->window, &ix, &iy, &mods); + x = ix; + y = iy; + } + else + { + x = event->x; + y = event->y; + } + + if (priv->mode == DRAG_H) + { + gtk_hsv_set_color (hsv, compute_v (hsv, x, y), priv->s, priv->v); + return TRUE; + } + else if (priv->mode == DRAG_SV) + { + double s, v; + + compute_sv (hsv, x, y, &s, &v); + gtk_hsv_set_color (hsv, priv->h, s, v); + return TRUE; + } + + g_assert_not_reached (); + return FALSE; } - /* Redrawing */ /* Paints the hue ring */ static void -paint_ring (GtkHSV *hsv, GdkDrawable *drawable, int x, int y, int width, int height) +paint_ring (GtkHSV *hsv, + GdkDrawable *drawable, + gint x, + gint y, + gint width, + gint height) { - HSVPrivate *priv; - int xx, yy; - double dx, dy, dist; - double center; - double inner, outer; - guchar *buf, *p; - double angle; - double hue; - double r, g, b; - GdkBitmap *mask; - GdkGC *gc; - GdkColor color; - - priv = hsv->priv; - - center = priv->size / 2.0; - - outer = priv->size / 2.0; - inner = outer - priv->ring_width; - - /* Paint the ring */ - - buf = g_new (guchar, width * height * 3); - - for (yy = 0; yy < height; yy++) { - p = buf + yy * width * 3; - - dy = -(yy + y - center); - - for (xx = 0; xx < width; xx++) { - dx = xx + x - center; - - dist = dx * dx + dy * dy; - if (dist < (inner * inner) || dist > (outer * outer)) { - *p++ = 0; - *p++ = 0; - *p++ = 0; - continue; - } - - angle = atan2 (dy, dx); - if (angle < 0.0) - angle += 2.0 * M_PI; - - hue = angle / (2.0 * M_PI); - - r = hue; - g = 1.0; - b = 1.0; - hsv_to_rgb (&r, &g, &b); - - *p++ = floor (r * 255 + 0.5); - *p++ = floor (g * 255 + 0.5); - *p++ = floor (b * 255 + 0.5); - } + HSVPrivate *priv; + int xx, yy; + gdouble dx, dy, dist; + gdouble center; + gdouble inner, outer; + guchar *buf, *p; + gdouble angle; + gdouble hue; + gdouble r, g, b; + GdkBitmap *mask; + GdkGC *gc; + GdkColor color; + + priv = hsv->priv; + + center = priv->size / 2.0; + + outer = priv->size / 2.0; + inner = outer - priv->ring_width; + + /* Paint the ring */ + + buf = g_new (guchar, width * height * 3); + + for (yy = 0; yy < height; yy++) + { + p = buf + yy * width * 3; + + dy = -(yy + y - center); + + for (xx = 0; xx < width; xx++) + { + dx = xx + x - center; + + dist = dx * dx + dy * dy; + if (dist < (inner * inner) || dist > (outer * outer)) + { + *p++ = 0; + *p++ = 0; + *p++ = 0; + continue; + } + + angle = atan2 (dy, dx); + if (angle < 0.0) + angle += 2.0 * M_PI; + + hue = angle / (2.0 * M_PI); + + r = hue; + g = 1.0; + b = 1.0; + hsv_to_rgb (&r, &g, &b); + + *p++ = floor (r * 255 + 0.5); + *p++ = floor (g * 255 + 0.5); + *p++ = floor (b * 255 + 0.5); } - - /* Create clipping mask */ - - mask = gdk_pixmap_new (NULL, width, height, 1); - gc = gdk_gc_new (mask); - - color.pixel = 0; - gdk_gc_set_foreground (gc, &color); - gdk_draw_rectangle (mask, gc, TRUE, - 0, 0, width, height); - - - color.pixel = 1; - gdk_gc_set_foreground (gc, &color); - gdk_draw_arc (mask, gc, TRUE, - -x, -y, - priv->size - 1, priv->size - 1, - 0, 360 * 64); - - color.pixel = 0; - gdk_gc_set_foreground (gc, &color); - gdk_draw_arc (mask, gc, TRUE, - -x + priv->ring_width - 1, -y + priv->ring_width - 1, - priv->size - 2 * priv->ring_width + 1, priv->size - 2 * priv->ring_width + 1, - 0, 360 * 64); - - gdk_gc_unref (gc); - - gdk_gc_set_clip_mask (priv->gc, mask); - gdk_gc_set_clip_origin (priv->gc, 0, 0); - - /* Draw ring */ - - gdk_draw_rgb_image_dithalign (drawable, priv->gc, 0, 0, width, height, - GDK_RGB_DITHER_MAX, - buf, - width * 3, - x, y); - - /* Draw value marker */ - - r = priv->h; - g = 1.0; - b = 1.0; - hsv_to_rgb (&r, &g, &b); - - if (INTENSITY (r, g, b) > 0.5) - gdk_rgb_gc_set_foreground (priv->gc, 0x000000); - else - gdk_rgb_gc_set_foreground (priv->gc, 0xffffff); - - gdk_draw_line (drawable, priv->gc, - -x + center, -y + center, - -x + center + cos (priv->h * 2.0 * M_PI) * center, - -y + center - sin (priv->h * 2.0 * M_PI) * center); - - gdk_gc_set_clip_mask (priv->gc, NULL); - gdk_bitmap_unref (mask); - - g_free (buf); - - /* Draw ring outline */ - - gdk_rgb_gc_set_foreground (priv->gc, 0x000000); - - gdk_draw_arc (drawable, priv->gc, FALSE, - -x, -y, - priv->size - 1, priv->size - 1, - 0, 360 * 64); - gdk_draw_arc (drawable, priv->gc, FALSE, - -x + priv->ring_width - 1, -y + priv->ring_width - 1, - priv->size - 2 * priv->ring_width + 1, priv->size - 2 * priv->ring_width + 1, - 0, 360 * 64); + } + + /* Create clipping mask */ + + mask = gdk_pixmap_new (NULL, width, height, 1); + gc = gdk_gc_new (mask); + + color.pixel = 0; + gdk_gc_set_foreground (gc, &color); + gdk_draw_rectangle (mask, gc, TRUE, + 0, 0, width, height); + + + color.pixel = 1; + gdk_gc_set_foreground (gc, &color); + gdk_draw_arc (mask, gc, TRUE, + -x, -y, + priv->size - 1, priv->size - 1, + 0, 360 * 64); + + color.pixel = 0; + gdk_gc_set_foreground (gc, &color); + gdk_draw_arc (mask, gc, TRUE, + -x + priv->ring_width - 1, -y + priv->ring_width - 1, + priv->size - 2 * priv->ring_width + 1, priv->size - 2 * priv->ring_width + 1, + 0, 360 * 64); + + gdk_gc_unref (gc); + + gdk_gc_set_clip_mask (priv->gc, mask); + gdk_gc_set_clip_origin (priv->gc, 0, 0); + + /* Draw ring */ + + gdk_draw_rgb_image_dithalign (drawable, priv->gc, 0, 0, width, height, + GDK_RGB_DITHER_MAX, + buf, + width * 3, + x, y); + + /* Draw value marker */ + + r = priv->h; + g = 1.0; + b = 1.0; + hsv_to_rgb (&r, &g, &b); + + if (INTENSITY (r, g, b) > 0.5) + gdk_rgb_gc_set_foreground (priv->gc, 0x000000); + else + gdk_rgb_gc_set_foreground (priv->gc, 0xffffff); + + gdk_draw_line (drawable, priv->gc, + -x + center, -y + center, + -x + center + cos (priv->h * 2.0 * M_PI) * center, + -y + center - sin (priv->h * 2.0 * M_PI) * center); + + gdk_gc_set_clip_mask (priv->gc, NULL); + gdk_bitmap_unref (mask); + + g_free (buf); + + /* Draw ring outline */ + + gdk_rgb_gc_set_foreground (priv->gc, 0x000000); + + gdk_draw_arc (drawable, priv->gc, FALSE, + -x, -y, + priv->size - 1, priv->size - 1, + 0, 360 * 64); + gdk_draw_arc (drawable, priv->gc, FALSE, + -x + priv->ring_width - 1, -y + priv->ring_width - 1, + priv->size - 2 * priv->ring_width + 1, priv->size - 2 * priv->ring_width + 1, + 0, 360 * 64); } /* Converts an HSV triplet to an integer RGB triplet */ static void -get_color (double h, double s, double v, int *r, int *g, int *b) +get_color (gdouble h, + gdouble s, + gdouble v, + gint *r, + gint *g, + gint *b) { - hsv_to_rgb (&h, &s, &v); - - *r = floor (h * 255 + 0.5); - *g = floor (s * 255 + 0.5); - *b = floor (v * 255 + 0.5); + hsv_to_rgb (&h, &s, &v); + + *r = floor (h * 255 + 0.5); + *g = floor (s * 255 + 0.5); + *b = floor (v * 255 + 0.5); } #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) @@ -940,250 +1004,273 @@ get_color (double h, double s, double v, int *r, int *g, int *b) /* Paints the HSV triangle */ static void -paint_triangle (GtkHSV *hsv, GdkDrawable *drawable, int x, int y, int width, int height) +paint_triangle (GtkHSV *hsv, + GdkDrawable *drawable, + gint x, + gint y, + gint width, + gint height) { - HSVPrivate *priv; - int hx, hy, sx, sy, vx, vy; /* HSV vertices */ - int x1, y1, r1, g1, b1; /* First vertex in scanline order */ - int x2, y2, r2, g2, b2; /* Second vertex */ - int x3, y3, r3, g3, b3; /* Third vertex */ - int t; - guchar *buf, *p; - int xl, xr, rl, rr, gl, gr, bl, br; /* Scanline data */ - int xx, yy; - GdkBitmap *mask; - GdkGC *gc; - GdkColor color; - GdkPoint points[3]; - double r, g, b; - - priv = hsv->priv; - - /* Compute triangle's vertices */ - - compute_triangle (hsv, &hx, &hy, &sx, &sy, &vx, &vy); - - x1 = hx; - y1 = hy; - get_color (priv->h, 1.0, 1.0, &r1, &g1, &b1); - - x2 = sx; - y2 = sy; - get_color (priv->h, 1.0, 0.0, &r2, &g2, &b2); - - x3 = vx; - y3 = vy; - get_color (priv->h, 0.0, 1.0, &r3, &g3, &b3); - - if (y2 > y3) { - SWAP (x2, x3, t); - SWAP (y2, y3, t); - SWAP (r2, r3, t); - SWAP (g2, g3, t); - SWAP (b2, b3, t); - } - - if (y1 > y3) { - SWAP (x1, x3, t); - SWAP (y1, y3, t); - SWAP (r1, r3, t); - SWAP (g1, g3, t); - SWAP (b1, b3, t); - } - - if (y1 > y2) { - SWAP (x1, x2, t); - SWAP (y1, y2, t); - SWAP (r1, r2, t); - SWAP (g1, g2, t); - SWAP (b1, b2, t); - } - - /* Shade the triangle */ - - buf = g_new (guchar, width * height * 3); - - for (yy = 0; yy < height; yy++) { - p = buf + yy * width * 3; - - if (yy + y < y1 || yy + y > y3) - for (xx = 0; xx < width; xx++) { - *p++ = 0; - *p++ = 0; - *p++ = 0; - } - else { - if (yy + y < y2) { - xl = LERP (x1, x2, y1, y2, yy + y); - - rl = LERP (r1, r2, y1, y2, yy + y); - gl = LERP (g1, g2, y1, y2, yy + y); - bl = LERP (b1, b2, y1, y2, yy + y); - } else { - xl = LERP (x2, x3, y2, y3, yy + y); - - rl = LERP (r2, r3, y2, y3, yy + y); - gl = LERP (g2, g3, y2, y3, yy + y); - bl = LERP (b2, b3, y2, y3, yy + y); - } - - xr = LERP (x1, x3, y1, y3, yy + y); - - rr = LERP (r1, r3, y1, y3, yy + y); - gr = LERP (g1, g3, y1, y3, yy + y); - br = LERP (b1, b3, y1, y3, yy + y); - - if (xl > xr) { - SWAP (xl, xr, t); - SWAP (rl, rr, t); - SWAP (gl, gr, t); - SWAP (bl, br, t); - } - - for (xx = 0; xx < width; xx++) { - if (xx + x < xl || xx + x > xr) { - *p++ = 0; - *p++ = 0; - *p++ = 0; - } else { - *p++ = LERP (rl, rr, xl, xr, xx + x); - *p++ = LERP (gl, gr, xl, xr, xx + x); - *p++ = LERP (bl, br, xl, xr, xx + x); - } - } - } - } - - /* Create clipping mask */ - - mask = gdk_pixmap_new (NULL, width, height, 1); - gc = gdk_gc_new (mask); - - color.pixel = 0; - gdk_gc_set_foreground (gc, &color); - gdk_draw_rectangle (mask, gc, TRUE, - 0, 0, width, height); - - color.pixel = 1; - gdk_gc_set_foreground (gc, &color); - - points[0].x = x1 - x; - points[0].y = y1 - y; - points[1].x = x2 - x; - points[1].y = y2 - y; - points[2].x = x3 - x; - points[2].y = y3 - y; - gdk_draw_polygon (mask, gc, TRUE, points, 3); - - gdk_gc_unref (gc); - - gdk_gc_set_clip_mask (priv->gc, mask); - gdk_gc_set_clip_origin (priv->gc, 0, 0); - - /* Draw triangle */ - - gdk_draw_rgb_image_dithalign (drawable, priv->gc, 0, 0, width, height, - GDK_RGB_DITHER_MAX, - buf, - width * 3, - x, y); - - gdk_gc_set_clip_mask (priv->gc, NULL); - gdk_bitmap_unref (mask); - - g_free (buf); - - /* Draw triangle outline */ - - gdk_rgb_gc_set_foreground (priv->gc, 0x000000); - - gdk_draw_polygon (drawable, priv->gc, FALSE, points, 3); - - /* Draw value marker */ - - xx = floor (sx + (vx - sx) * priv->v + (hx - vx) * priv->s * priv->v + 0.5); - yy = floor (sy + (vy - sy) * priv->v + (hy - vy) * priv->s * priv->v + 0.5); - - r = priv->h; - g = priv->s; - b = priv->v; - hsv_to_rgb (&r, &g, &b); - - if (INTENSITY (r, g, b) > 0.5) - gdk_rgb_gc_set_foreground (priv->gc, 0x000000); + HSVPrivate *priv; + gint hx, hy, sx, sy, vx, vy; /* HSV vertices */ + gint x1, y1, r1, g1, b1; /* First vertex in scanline order */ + gint x2, y2, r2, g2, b2; /* Second vertex */ + gint x3, y3, r3, g3, b3; /* Third vertex */ + gint t; + guchar *buf, *p; + gint xl, xr, rl, rr, gl, gr, bl, br; /* Scanline data */ + gint xx, yy; + GdkBitmap *mask; + GdkGC *gc; + GdkColor color; + GdkPoint points[3]; + gdouble r, g, b; + + priv = hsv->priv; + + /* Compute triangle's vertices */ + + compute_triangle (hsv, &hx, &hy, &sx, &sy, &vx, &vy); + + x1 = hx; + y1 = hy; + get_color (priv->h, 1.0, 1.0, &r1, &g1, &b1); + + x2 = sx; + y2 = sy; + get_color (priv->h, 1.0, 0.0, &r2, &g2, &b2); + + x3 = vx; + y3 = vy; + get_color (priv->h, 0.0, 1.0, &r3, &g3, &b3); + + if (y2 > y3) + { + SWAP (x2, x3, t); + SWAP (y2, y3, t); + SWAP (r2, r3, t); + SWAP (g2, g3, t); + SWAP (b2, b3, t); + } + + if (y1 > y3) + { + SWAP (x1, x3, t); + SWAP (y1, y3, t); + SWAP (r1, r3, t); + SWAP (g1, g3, t); + SWAP (b1, b3, t); + } + + if (y1 > y2) + { + SWAP (x1, x2, t); + SWAP (y1, y2, t); + SWAP (r1, r2, t); + SWAP (g1, g2, t); + SWAP (b1, b2, t); + } + + /* Shade the triangle */ + + buf = g_new (guchar, width * height * 3); + + for (yy = 0; yy < height; yy++) + { + p = buf + yy * width * 3; + + if (yy + y < y1 || yy + y > y3) + for (xx = 0; xx < width; xx++) + { + *p++ = 0; + *p++ = 0; + *p++ = 0; + } + else { + if (yy + y < y2) + { + xl = LERP (x1, x2, y1, y2, yy + y); + + rl = LERP (r1, r2, y1, y2, yy + y); + gl = LERP (g1, g2, y1, y2, yy + y); + bl = LERP (b1, b2, y1, y2, yy + y); + } else - gdk_rgb_gc_set_foreground (priv->gc, 0xffffff); - - gdk_draw_arc (drawable, priv->gc, FALSE, - xx - 3, yy - 3, - 6, 6, - 0, 360 * 64); - gdk_draw_arc (drawable, priv->gc, FALSE, - xx - 2, yy - 2, - 4, 4, - 0, 360 * 64); + { + xl = LERP (x2, x3, y2, y3, yy + y); + + rl = LERP (r2, r3, y2, y3, yy + y); + gl = LERP (g2, g3, y2, y3, yy + y); + bl = LERP (b2, b3, y2, y3, yy + y); + } + + xr = LERP (x1, x3, y1, y3, yy + y); + + rr = LERP (r1, r3, y1, y3, yy + y); + gr = LERP (g1, g3, y1, y3, yy + y); + br = LERP (b1, b3, y1, y3, yy + y); + + if (xl > xr) + { + SWAP (xl, xr, t); + SWAP (rl, rr, t); + SWAP (gl, gr, t); + SWAP (bl, br, t); + } + + for (xx = 0; xx < width; xx++) + { + if (xx + x < xl || xx + x > xr) + { + *p++ = 0; + *p++ = 0; + *p++ = 0; + } + else + { + *p++ = LERP (rl, rr, xl, xr, xx + x); + *p++ = LERP (gl, gr, xl, xr, xx + x); + *p++ = LERP (bl, br, xl, xr, xx + x); + } + } + } + } + + /* Create clipping mask */ + + mask = gdk_pixmap_new (NULL, width, height, 1); + gc = gdk_gc_new (mask); + + color.pixel = 0; + gdk_gc_set_foreground (gc, &color); + gdk_draw_rectangle (mask, gc, TRUE, + 0, 0, width, height); + + color.pixel = 1; + gdk_gc_set_foreground (gc, &color); + + points[0].x = x1 - x; + points[0].y = y1 - y; + points[1].x = x2 - x; + points[1].y = y2 - y; + points[2].x = x3 - x; + points[2].y = y3 - y; + gdk_draw_polygon (mask, gc, TRUE, points, 3); + + gdk_gc_unref (gc); + + gdk_gc_set_clip_mask (priv->gc, mask); + gdk_gc_set_clip_origin (priv->gc, 0, 0); + + /* Draw triangle */ + + gdk_draw_rgb_image_dithalign (drawable, priv->gc, 0, 0, width, height, + GDK_RGB_DITHER_MAX, + buf, + width * 3, + x, y); + + gdk_gc_set_clip_mask (priv->gc, NULL); + gdk_bitmap_unref (mask); + + g_free (buf); + + /* Draw triangle outline */ + + gdk_rgb_gc_set_foreground (priv->gc, 0x000000); + + gdk_draw_polygon (drawable, priv->gc, FALSE, points, 3); + + /* Draw value marker */ + + xx = floor (sx + (vx - sx) * priv->v + (hx - vx) * priv->s * priv->v + 0.5); + yy = floor (sy + (vy - sy) * priv->v + (hy - vy) * priv->s * priv->v + 0.5); + + r = priv->h; + g = priv->s; + b = priv->v; + hsv_to_rgb (&r, &g, &b); + + if (INTENSITY (r, g, b) > 0.5) + gdk_rgb_gc_set_foreground (priv->gc, 0x000000); + else + gdk_rgb_gc_set_foreground (priv->gc, 0xffffff); + + gdk_draw_arc (drawable, priv->gc, FALSE, + xx - 3, yy - 3, + 6, 6, + 0, 360 * 64); + gdk_draw_arc (drawable, priv->gc, FALSE, + xx - 2, yy - 2, + 4, 4, + 0, 360 * 64); } /* Paints the contents of the HSV color selector */ static void -paint (GtkHSV *hsv, GdkDrawable *drawable, int x, int y, int width, int height) +paint (GtkHSV *hsv, + GdkDrawable *drawable, + gint x, + gint y, + gint width, + gint height) { - paint_ring (hsv, drawable, x, y, width, height); - paint_triangle (hsv, drawable, x, y, width, height); + paint_ring (hsv, drawable, x, y, width, height); + paint_triangle (hsv, drawable, x, y, width, height); } /* Expose_event handler for the HSV color selector */ static gint -gtk_hsv_expose (GtkWidget *widget, GdkEventExpose *event) +gtk_hsv_expose (GtkWidget *widget, + GdkEventExpose *event) { - GtkHSV *hsv; - HSVPrivate *priv; - GdkRectangle rect, dest; - GdkPixmap *pixmap; - - hsv = GTK_HSV (widget); - priv = hsv->priv; - - if (!(GTK_WIDGET_DRAWABLE (widget) && event->window == widget->window)) - return FALSE; - - rect.x = widget->allocation.x; - rect.y = widget->allocation.y; - rect.width = widget->allocation.width; - rect.height = widget->allocation.height; - - if (!gdk_rectangle_intersect (&event->area, &rect, &dest)) - return FALSE; - - pixmap = gdk_pixmap_new (widget->window, dest.width, dest.height, - gtk_widget_get_visual (widget)->depth); - - rect = dest; - rect.x = 0; - rect.y = 0; - - gdk_draw_rectangle (pixmap, - widget->style->bg_gc[GTK_WIDGET_STATE (widget)], - TRUE, - 0, 0, dest.width, dest.height); - paint (hsv, pixmap, - dest.x - widget->allocation.x, dest.y - widget->allocation.y, - dest.width, dest.height); - - gdk_draw_pixmap (widget->window, - priv->gc, - pixmap, - 0, 0, - dest.x, - dest.y, - event->area.width, event->area.height); - - gdk_pixmap_unref (pixmap); - - return FALSE; + GtkHSV *hsv; + HSVPrivate *priv; + GdkRectangle rect, dest; + GdkPixmap *pixmap; + + hsv = GTK_HSV (widget); + priv = hsv->priv; + + if (!(GTK_WIDGET_DRAWABLE (widget) && event->window == widget->window)) + return FALSE; + + rect.x = widget->allocation.x; + rect.y = widget->allocation.y; + rect.width = widget->allocation.width; + rect.height = widget->allocation.height; + + if (!gdk_rectangle_intersect (&event->area, &rect, &dest)) + return FALSE; + + pixmap = gdk_pixmap_new (widget->window, dest.width, dest.height, + gtk_widget_get_visual (widget)->depth); + + rect = dest; + rect.x = 0; + rect.y = 0; + + gdk_draw_rectangle (pixmap, + widget->style->bg_gc[GTK_WIDGET_STATE (widget)], + TRUE, + 0, 0, dest.width, dest.height); + paint (hsv, pixmap, + dest.x - widget->allocation.x, dest.y - widget->allocation.y, + dest.width, dest.height); + + gdk_draw_pixmap (widget->window, + priv->gc, + pixmap, + 0, 0, + dest.x, + dest.y, + event->area.width, event->area.height); + + gdk_pixmap_unref (pixmap); + + return FALSE; } - /** * gtk_hsv_new: @@ -1193,10 +1280,10 @@ gtk_hsv_expose (GtkWidget *widget, GdkEventExpose *event) * * Return value: A newly-created HSV color selector. **/ -GtkWidget * +GtkWidget* gtk_hsv_new (void) { - return GTK_WIDGET (gtk_type_new (gtk_hsv_get_type ())); + return GTK_WIDGET (gtk_type_new (GTK_TYPE_HSV)); } /** @@ -1210,25 +1297,28 @@ gtk_hsv_new (void) * be in the [0.0, 1.0] range. **/ void -gtk_hsv_set_color (GtkHSV *hsv, double h, double s, double v) +gtk_hsv_set_color (GtkHSV *hsv, + gdouble h, + gdouble s, + gdouble v) { - HSVPrivate *priv; - - g_return_if_fail (hsv != NULL); - g_return_if_fail (GTK_IS_HSV (hsv)); - g_return_if_fail (h >= 0.0 && h <= 1.0); - g_return_if_fail (s >= 0.0 && s <= 1.0); - g_return_if_fail (v >= 0.0 && v <= 1.0); - - priv = hsv->priv; - - priv->h = h; - priv->s = s; - priv->v = v; - - gtk_signal_emit (GTK_OBJECT (hsv), hsv_signals[CHANGED]); - - gtk_widget_queue_draw (GTK_WIDGET (hsv)); + HSVPrivate *priv; + + g_return_if_fail (hsv != NULL); + g_return_if_fail (GTK_IS_HSV (hsv)); + g_return_if_fail (h >= 0.0 && h <= 1.0); + g_return_if_fail (s >= 0.0 && s <= 1.0); + g_return_if_fail (v >= 0.0 && v <= 1.0); + + priv = hsv->priv; + + priv->h = h; + priv->s = s; + priv->v = v; + + gtk_signal_emit (GTK_OBJECT (hsv), hsv_signals[CHANGED]); + + gtk_widget_queue_draw (GTK_WIDGET (hsv)); } /** @@ -1244,21 +1334,21 @@ gtk_hsv_set_color (GtkHSV *hsv, double h, double s, double v) void gtk_hsv_get_color (GtkHSV *hsv, double *h, double *s, double *v) { - HSVPrivate *priv; - - g_return_if_fail (hsv != NULL); - g_return_if_fail (GTK_IS_HSV (hsv)); - - priv = hsv->priv; - - if (h) - *h = priv->h; - - if (s) - *s = priv->s; - - if (v) - *v = priv->v; + HSVPrivate *priv; + + g_return_if_fail (hsv != NULL); + g_return_if_fail (GTK_IS_HSV (hsv)); + + priv = hsv->priv; + + if (h) + *h = priv->h; + + if (s) + *s = priv->s; + + if (v) + *v = priv->v; } /** @@ -1270,28 +1360,30 @@ gtk_hsv_get_color (GtkHSV *hsv, double *h, double *s, double *v) * Sets the size and ring width of an HSV color selector. **/ void -gtk_hsv_set_metrics (GtkHSV *hsv, int size, int ring_width) +gtk_hsv_set_metrics (GtkHSV *hsv, + gint size, + gint ring_width) { - HSVPrivate *priv; - int same_size; - - g_return_if_fail (hsv != NULL); - g_return_if_fail (GTK_IS_HSV (hsv)); - g_return_if_fail (size > 0); - g_return_if_fail (ring_width > 0); - g_return_if_fail (2 * ring_width + 1 <= size); - - priv = hsv->priv; - - same_size = (priv->size == size); - - priv->size = size; - priv->ring_width = ring_width; - - if (same_size) - gtk_widget_queue_draw (GTK_WIDGET (hsv)); - else - gtk_widget_queue_resize (GTK_WIDGET (hsv)); + HSVPrivate *priv; + int same_size; + + g_return_if_fail (hsv != NULL); + g_return_if_fail (GTK_IS_HSV (hsv)); + g_return_if_fail (size > 0); + g_return_if_fail (ring_width > 0); + g_return_if_fail (2 * ring_width + 1 <= size); + + priv = hsv->priv; + + same_size = (priv->size == size); + + priv->size = size; + priv->ring_width = ring_width; + + if (same_size) + gtk_widget_queue_draw (GTK_WIDGET (hsv)); + else + gtk_widget_queue_resize (GTK_WIDGET (hsv)); } /** @@ -1303,20 +1395,22 @@ gtk_hsv_set_metrics (GtkHSV *hsv, int size, int ring_width) * Queries the size and ring width of an HSV color selector. **/ void -gtk_hsv_get_metrics (GtkHSV *hsv, int *size, int *ring_width) +gtk_hsv_get_metrics (GtkHSV *hsv, + gint *size, + gint *ring_width) { - HSVPrivate *priv; - - g_return_if_fail (hsv != NULL); - g_return_if_fail (GTK_IS_HSV (hsv)); - - priv = hsv->priv; - - if (size) - *size = priv->size; - - if (ring_width) - *ring_width = priv->ring_width; + HSVPrivate *priv; + + g_return_if_fail (hsv != NULL); + g_return_if_fail (GTK_IS_HSV (hsv)); + + priv = hsv->priv; + + if (size) + *size = priv->size; + + if (ring_width) + *ring_width = priv->ring_width; } /** @@ -1335,13 +1429,14 @@ gtk_hsv_get_metrics (GtkHSV *hsv, int *size, int *ring_width) gboolean gtk_hsv_is_adjusting (GtkHSV *hsv) { - HSVPrivate *priv; - - g_return_val_if_fail (hsv != NULL, FALSE); - g_return_val_if_fail (GTK_IS_HSV (hsv), FALSE); - - priv = hsv->priv; - return (priv->mode != DRAG_NONE); + HSVPrivate *priv; + + g_return_val_if_fail (hsv != NULL, FALSE); + g_return_val_if_fail (GTK_IS_HSV (hsv), FALSE); + + priv = hsv->priv; + + return priv->mode != DRAG_NONE; } /** @@ -1357,22 +1452,27 @@ gtk_hsv_is_adjusting (GtkHSV *hsv) * [0.0, 1.0] range; output values will be in the same range. **/ void -gtk_hsv_to_rgb (double h, double s, double v, double *r, double *g, double *b) +gtk_hsv_to_rgb (gdouble h, + gdouble s, + gdouble v, + gdouble *r, + gdouble *g, + gdouble *b) { - g_return_if_fail (h >= 0.0 && h <= 1.0); - g_return_if_fail (s >= 0.0 && s <= 1.0); - g_return_if_fail (v >= 0.0 && v <= 1.0); - - hsv_to_rgb (&h, &s, &v); - - if (r) - *r = h; - - if (g) - *g = s; - - if (b) - *b = v; + g_return_if_fail (h >= 0.0 && h <= 1.0); + g_return_if_fail (s >= 0.0 && s <= 1.0); + g_return_if_fail (v >= 0.0 && v <= 1.0); + + hsv_to_rgb (&h, &s, &v); + + if (r) + *r = h; + + if (g) + *g = s; + + if (b) + *b = v; } /** @@ -1388,20 +1488,25 @@ gtk_hsv_to_rgb (double h, double s, double v, double *r, double *g, double *b) * [0.0, 1.0] range; output values will be in the same range. **/ void -gtk_rgb_to_hsv (double r, double g, double b, double *h, double *s, double *v) +gtk_rgb_to_hsv (gdouble r, + gdouble g, + gdouble b, + gdouble *h, + gdouble *s, + gdouble *v) { - g_return_if_fail (r >= 0.0 && r <= 1.0); - g_return_if_fail (g >= 0.0 && g <= 1.0); - g_return_if_fail (b >= 0.0 && b <= 1.0); - - rgb_to_hsv (&r, &g, &b); - - if (h) - *h = r; - - if (s) - *s = g; - - if (v) - *v = b; + g_return_if_fail (r >= 0.0 && r <= 1.0); + g_return_if_fail (g >= 0.0 && g <= 1.0); + g_return_if_fail (b >= 0.0 && b <= 1.0); + + rgb_to_hsv (&r, &g, &b); + + if (h) + *h = r; + + if (s) + *s = g; + + if (v) + *v = b; } |