* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
+#include "config.h"
#include <string.h>
+#include "gdkcairo.h"
#include "gdkgc.h"
+#include "gdkinternals.h"
+#include "gdkpixmap.h"
#include "gdkrgb.h"
#include "gdkprivate.h"
+#include "gdkalias.h"
-static void gdk_gc_class_init (GObjectClass *class);
static void gdk_gc_finalize (GObject *object);
-static GObjectClass *parent_class;
+typedef struct _GdkGCPrivate GdkGCPrivate;
-GType
-gdk_gc_get_type (void)
+struct _GdkGCPrivate
{
- static GType object_type = 0;
+ GdkRegion *clip_region;
- if (!object_type)
- {
- static const GTypeInfo object_info =
- {
- sizeof (GdkGCClass),
- (GBaseInitFunc) NULL,
- (GBaseFinalizeFunc) NULL,
- (GClassInitFunc) gdk_gc_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (GdkGC),
- 0, /* n_preallocs */
- (GInstanceInitFunc) NULL,
- };
-
- object_type = g_type_register_static (G_TYPE_OBJECT,
- "GdkGC",
- &object_info, 0);
- }
+ guint32 region_tag_applied;
+ int region_tag_offset_x;
+ int region_tag_offset_y;
+
+ GdkRegion *old_clip_region;
+ GdkPixmap *old_clip_mask;
+
+ GdkBitmap *stipple;
+ GdkPixmap *tile;
+
+ GdkPixmap *clip_mask;
+
+ guint32 fg_pixel;
+ guint32 bg_pixel;
+
+ guint subwindow_mode : 1;
+ guint fill : 2;
+ guint exposures : 2;
+};
+
+#define GDK_GC_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDK_TYPE_GC, GdkGCPrivate))
+
+G_DEFINE_TYPE (GdkGC, gdk_gc, G_TYPE_OBJECT)
+
+static void
+gdk_gc_class_init (GdkGCClass *class)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (class);
- return object_type;
+ object_class->finalize = gdk_gc_finalize;
+
+ g_type_class_add_private (object_class, sizeof (GdkGCPrivate));
}
static void
-gdk_gc_class_init (GObjectClass *class)
+gdk_gc_init (GdkGC *gc)
{
- parent_class = g_type_class_peek_parent (class);
-
- class->finalize = gdk_gc_finalize;
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ priv->fill = GDK_SOLID;
+
+ /* These are the default X11 value, which we match. They are clearly
+ * wrong for TrueColor displays, so apps have to change them.
+ */
+ priv->fg_pixel = 0;
+ priv->bg_pixel = 1;
}
+/**
+ * gdk_gc_new:
+ * @drawable: a #GdkDrawable. The created GC must always be used
+ * with drawables of the same depth as this one.
+ *
+ * Create a new graphics context with default values.
+ *
+ * Returns: the new graphics context.
+ **/
GdkGC*
gdk_gc_new (GdkDrawable *drawable)
{
return gdk_gc_new_with_values (drawable, NULL, 0);
}
+/**
+ * gdk_gc_new_with_values:
+ * @drawable: a #GdkDrawable. The created GC must always be used
+ * with drawables of the same depth as this one.
+ * @values: a structure containing initial values for the GC.
+ * @values_mask: a bit mask indicating which fields in @values
+ * are set.
+ *
+ * Create a new GC with the given initial values.
+ *
+ * Return value: the new graphics context.
+ **/
GdkGC*
gdk_gc_new_with_values (GdkDrawable *drawable,
GdkGCValues *values,
GdkGCValuesMask values_mask)
{
- GdkGC *gc;
-
g_return_val_if_fail (drawable != NULL, NULL);
- gc = GDK_DRAWABLE_GET_CLASS (drawable)->create_gc (drawable,
- values,
- values_mask);
+ return GDK_DRAWABLE_GET_CLASS (drawable)->create_gc (drawable,
+ values,
+ values_mask);
+}
+
+/**
+ * _gdk_gc_init:
+ * @gc: a #GdkGC
+ * @drawable: a #GdkDrawable.
+ * @values: a structure containing initial values for the GC.
+ * @values_mask: a bit mask indicating which fields in @values
+ * are set.
+ *
+ * Does initialization of the generic portions of a #GdkGC
+ * created with the specified values and values_mask. This
+ * should be called out of the implementation of
+ * GdkDrawable.create_gc() immediately after creating the
+ * #GdkGC object.
+ **/
+void
+_gdk_gc_init (GdkGC *gc,
+ GdkDrawable *drawable,
+ GdkGCValues *values,
+ GdkGCValuesMask values_mask)
+{
+ GdkGCPrivate *priv;
+
+ g_return_if_fail (GDK_IS_GC (gc));
+
+ priv = GDK_GC_GET_PRIVATE (gc);
- if (gc == NULL) /* This would mean the drawable was destroyed. */
- return NULL;
-
if (values_mask & GDK_GC_CLIP_X_ORIGIN)
gc->clip_x_origin = values->clip_x_origin;
if (values_mask & GDK_GC_CLIP_Y_ORIGIN)
gc->clip_y_origin = values->clip_y_origin;
+ if ((values_mask & GDK_GC_CLIP_MASK) && values->clip_mask)
+ priv->clip_mask = g_object_ref (values->clip_mask);
if (values_mask & GDK_GC_TS_X_ORIGIN)
gc->ts_x_origin = values->ts_x_origin;
if (values_mask & GDK_GC_TS_Y_ORIGIN)
gc->ts_y_origin = values->ts_y_origin;
+ if (values_mask & GDK_GC_FILL)
+ priv->fill = values->fill;
+ if (values_mask & GDK_GC_STIPPLE)
+ {
+ priv->stipple = values->stipple;
+ if (priv->stipple)
+ g_object_ref (priv->stipple);
+ }
+ if (values_mask & GDK_GC_TILE)
+ {
+ priv->tile = values->tile;
+ if (priv->tile)
+ g_object_ref (priv->tile);
+ }
+ if (values_mask & GDK_GC_FOREGROUND)
+ priv->fg_pixel = values->foreground.pixel;
+ if (values_mask & GDK_GC_BACKGROUND)
+ priv->bg_pixel = values->background.pixel;
+ if (values_mask & GDK_GC_SUBWINDOW)
+ priv->subwindow_mode = values->subwindow_mode;
+ if (values_mask & GDK_GC_EXPOSURES)
+ priv->exposures = values->graphics_exposures;
+ else
+ priv->exposures = TRUE;
gc->colormap = gdk_drawable_get_colormap (drawable);
if (gc->colormap)
- g_object_ref (G_OBJECT (gc->colormap));
-
- return gc;
+ g_object_ref (gc->colormap);
}
static void
gdk_gc_finalize (GObject *object)
{
GdkGC *gc = GDK_GC (object);
-
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ if (priv->clip_region)
+ gdk_region_destroy (priv->clip_region);
+ if (priv->old_clip_region)
+ gdk_region_destroy (priv->old_clip_region);
+ if (priv->clip_mask)
+ g_object_unref (priv->clip_mask);
+ if (priv->old_clip_mask)
+ g_object_unref (priv->old_clip_mask);
if (gc->colormap)
- g_object_unref (G_OBJECT (gc->colormap));
+ g_object_unref (gc->colormap);
+ if (priv->tile)
+ g_object_unref (priv->tile);
+ if (priv->stipple)
+ g_object_unref (priv->stipple);
- parent_class->finalize (object);
+ G_OBJECT_CLASS (gdk_gc_parent_class)->finalize (object);
}
/**
* Deprecated function; use g_object_ref() instead.
*
* Return value: the gc.
+ *
+ * Deprecated: 2.0: Use g_object_ref() instead.
**/
GdkGC *
gdk_gc_ref (GdkGC *gc)
{
- return (GdkGC *) g_object_ref (G_OBJECT (gc));
+ return (GdkGC *) g_object_ref (gc);
}
/**
* gdk_gc_unref:
* @gc: a #GdkGC
*
- * Deprecated function; use g_object_unref() instead.
+ * Decrement the reference count of @gc.
*
- * Return value: the gc.
+ * Deprecated: 2.0: Use g_object_unref() instead.
**/
void
gdk_gc_unref (GdkGC *gc)
{
- g_object_unref (G_OBJECT (gc));
+ g_object_unref (gc);
}
+/**
+ * gdk_gc_get_values:
+ * @gc: a #GdkGC.
+ * @values: the #GdkGCValues structure in which to store the results.
+ *
+ * Retrieves the current values from a graphics context. Note that
+ * only the pixel values of the @values->foreground and @values->background
+ * are filled, use gdk_colormap_query_color() to obtain the rgb values
+ * if you need them.
+ **/
void
gdk_gc_get_values (GdkGC *gc,
GdkGCValues *values)
GdkGCValues *values,
GdkGCValuesMask values_mask)
{
+ GdkGCPrivate *priv;
+
g_return_if_fail (GDK_IS_GC (gc));
g_return_if_fail (values != NULL);
+ priv = GDK_GC_GET_PRIVATE (gc);
+
+ if ((values_mask & GDK_GC_CLIP_X_ORIGIN) ||
+ (values_mask & GDK_GC_CLIP_Y_ORIGIN) ||
+ (values_mask & GDK_GC_CLIP_MASK) ||
+ (values_mask & GDK_GC_SUBWINDOW))
+ _gdk_gc_remove_drawable_clip (gc);
+
if (values_mask & GDK_GC_CLIP_X_ORIGIN)
gc->clip_x_origin = values->clip_x_origin;
if (values_mask & GDK_GC_CLIP_Y_ORIGIN)
gc->ts_x_origin = values->ts_x_origin;
if (values_mask & GDK_GC_TS_Y_ORIGIN)
gc->ts_y_origin = values->ts_y_origin;
+ if (values_mask & GDK_GC_CLIP_MASK)
+ {
+ if (priv->clip_mask)
+ {
+ g_object_unref (priv->clip_mask);
+ priv->clip_mask = NULL;
+ }
+ if (values->clip_mask)
+ priv->clip_mask = g_object_ref (values->clip_mask);
+
+ if (priv->clip_region)
+ {
+ gdk_region_destroy (priv->clip_region);
+ priv->clip_region = NULL;
+ }
+ }
+ if (values_mask & GDK_GC_FILL)
+ priv->fill = values->fill;
+ if (values_mask & GDK_GC_STIPPLE)
+ {
+ if (priv->stipple != values->stipple)
+ {
+ if (priv->stipple)
+ g_object_unref (priv->stipple);
+ priv->stipple = values->stipple;
+ if (priv->stipple)
+ g_object_ref (priv->stipple);
+ }
+ }
+ if (values_mask & GDK_GC_TILE)
+ {
+ if (priv->tile != values->tile)
+ {
+ if (priv->tile)
+ g_object_unref (priv->tile);
+ priv->tile = values->tile;
+ if (priv->tile)
+ g_object_ref (priv->tile);
+ }
+ }
+ if (values_mask & GDK_GC_FOREGROUND)
+ priv->fg_pixel = values->foreground.pixel;
+ if (values_mask & GDK_GC_BACKGROUND)
+ priv->bg_pixel = values->background.pixel;
+ if (values_mask & GDK_GC_SUBWINDOW)
+ priv->subwindow_mode = values->subwindow_mode;
+ if (values_mask & GDK_GC_EXPOSURES)
+ priv->exposures = values->graphics_exposures;
GDK_GC_GET_CLASS (gc)->set_values (gc, values, values_mask);
}
+/**
+ * gdk_gc_set_foreground:
+ * @gc: a #GdkGC.
+ * @color: the new foreground color.
+ *
+ * Sets the foreground color for a graphics context.
+ * Note that this function uses @color->pixel, use
+ * gdk_gc_set_rgb_fg_color() to specify the foreground
+ * color as red, green, blue components.
+ **/
void
-gdk_gc_set_foreground (GdkGC *gc,
- GdkColor *color)
+gdk_gc_set_foreground (GdkGC *gc,
+ const GdkColor *color)
{
GdkGCValues values;
gdk_gc_set_values (gc, &values, GDK_GC_FOREGROUND);
}
+/**
+ * gdk_gc_set_background:
+ * @gc: a #GdkGC.
+ * @color: the new background color.
+ *
+ * Sets the background color for a graphics context.
+ * Note that this function uses @color->pixel, use
+ * gdk_gc_set_rgb_bg_color() to specify the background
+ * color as red, green, blue components.
+ **/
void
-gdk_gc_set_background (GdkGC *gc,
- GdkColor *color)
+gdk_gc_set_background (GdkGC *gc,
+ const GdkColor *color)
{
GdkGCValues values;
gdk_gc_set_values (gc, &values, GDK_GC_BACKGROUND);
}
+/**
+ * gdk_gc_set_font:
+ * @gc: a #GdkGC.
+ * @font: the new font.
+ *
+ * Sets the font for a graphics context. (Note that
+ * all text-drawing functions in GDK take a @font
+ * argument; the value set here is used when that
+ * argument is %NULL.)
+ **/
void
gdk_gc_set_font (GdkGC *gc,
GdkFont *font)
gdk_gc_set_values (gc, &values, GDK_GC_FONT);
}
+/**
+ * gdk_gc_set_function:
+ * @gc: a #GdkGC.
+ * @function: the #GdkFunction to use
+ *
+ * Determines how the current pixel values and the
+ * pixel values being drawn are combined to produce
+ * the final pixel values.
+ **/
void
gdk_gc_set_function (GdkGC *gc,
GdkFunction function)
gdk_gc_set_values (gc, &values, GDK_GC_FUNCTION);
}
+/**
+ * gdk_gc_set_fill:
+ * @gc: a #GdkGC.
+ * @fill: the new fill mode.
+ *
+ * Set the fill mode for a graphics context.
+ **/
void
gdk_gc_set_fill (GdkGC *gc,
GdkFill fill)
gdk_gc_set_values (gc, &values, GDK_GC_FILL);
}
+/**
+ * gdk_gc_set_tile:
+ * @gc: a #GdkGC.
+ * @tile: the new tile pixmap.
+ *
+ * Set a tile pixmap for a graphics context.
+ * This will only be used if the fill mode
+ * is %GDK_TILED.
+ **/
void
gdk_gc_set_tile (GdkGC *gc,
GdkPixmap *tile)
gdk_gc_set_values (gc, &values, GDK_GC_TILE);
}
+/**
+ * gdk_gc_set_stipple:
+ * @gc: a #GdkGC.
+ * @stipple: the new stipple bitmap.
+ *
+ * Set the stipple bitmap for a graphics context. The
+ * stipple will only be used if the fill mode is
+ * %GDK_STIPPLED or %GDK_OPAQUE_STIPPLED.
+ **/
void
gdk_gc_set_stipple (GdkGC *gc,
GdkPixmap *stipple)
gdk_gc_set_values (gc, &values, GDK_GC_STIPPLE);
}
+/**
+ * gdk_gc_set_ts_origin:
+ * @gc: a #GdkGC.
+ * @x: the x-coordinate of the origin.
+ * @y: the y-coordinate of the origin.
+ *
+ * Set the origin when using tiles or stipples with
+ * the GC. The tile or stipple will be aligned such
+ * that the upper left corner of the tile or stipple
+ * will coincide with this point.
+ **/
void
gdk_gc_set_ts_origin (GdkGC *gc,
gint x,
GDK_GC_TS_X_ORIGIN | GDK_GC_TS_Y_ORIGIN);
}
+/**
+ * gdk_gc_set_clip_origin:
+ * @gc: a #GdkGC.
+ * @x: the x-coordinate of the origin.
+ * @y: the y-coordinate of the origin.
+ *
+ * Sets the origin of the clip mask. The coordinates are
+ * interpreted relative to the upper-left corner of
+ * the destination drawable of the current operation.
+ **/
void
gdk_gc_set_clip_origin (GdkGC *gc,
gint x,
GDK_GC_CLIP_X_ORIGIN | GDK_GC_CLIP_Y_ORIGIN);
}
+/**
+ * gdk_gc_set_clip_mask:
+ * @gc: the #GdkGC.
+ * @mask: a bitmap.
+ *
+ * Sets the clip mask for a graphics context from a bitmap.
+ * The clip mask is interpreted relative to the clip
+ * origin. (See gdk_gc_set_clip_origin()).
+ **/
void
gdk_gc_set_clip_mask (GdkGC *gc,
GdkBitmap *mask)
gdk_gc_set_values (gc, &values, GDK_GC_CLIP_MASK);
}
+/* Takes ownership of passed in region */
+static void
+_gdk_gc_set_clip_region_real (GdkGC *gc,
+ GdkRegion *region,
+ gboolean reset_origin)
+{
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ if (priv->clip_mask)
+ {
+ g_object_unref (priv->clip_mask);
+ priv->clip_mask = NULL;
+ }
+
+ if (priv->clip_region)
+ gdk_region_destroy (priv->clip_region);
+
+ priv->clip_region = region;
+
+ _gdk_windowing_gc_set_clip_region (gc, region, reset_origin);
+}
+
+/* Doesn't copy region, allows not to reset origin */
+void
+_gdk_gc_set_clip_region_internal (GdkGC *gc,
+ GdkRegion *region,
+ gboolean reset_origin)
+{
+ _gdk_gc_remove_drawable_clip (gc);
+ _gdk_gc_set_clip_region_real (gc, region, reset_origin);
+}
+
+
+void
+_gdk_gc_add_drawable_clip (GdkGC *gc,
+ guint32 region_tag,
+ GdkRegion *region,
+ int offset_x,
+ int offset_y)
+{
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ if (priv->region_tag_applied == region_tag &&
+ offset_x == priv->region_tag_offset_x &&
+ offset_y == priv->region_tag_offset_y)
+ return; /* Already appied this drawable region */
+
+ if (priv->region_tag_applied)
+ _gdk_gc_remove_drawable_clip (gc);
+
+ region = gdk_region_copy (region);
+ if (offset_x != 0 || offset_y != 0)
+ gdk_region_offset (region, offset_x, offset_y);
+
+ if (priv->clip_mask)
+ {
+ int w, h;
+ GdkPixmap *new_mask;
+ GdkGC *tmp_gc;
+ GdkColor black = {0, 0, 0, 0};
+ GdkRectangle r;
+ GdkOverlapType overlap;
+
+ gdk_drawable_get_size (priv->clip_mask, &w, &h);
+
+ r.x = 0;
+ r.y = 0;
+ r.width = w;
+ r.height = h;
+
+ /* Its quite common to expose areas that are completely in or outside
+ * the region, so we try to avoid allocating bitmaps that are just fully
+ * set or completely unset.
+ */
+ overlap = gdk_region_rect_in (region, &r);
+ if (overlap == GDK_OVERLAP_RECTANGLE_PART)
+ {
+ /* The region and the mask intersect, create a new clip mask that
+ includes both areas */
+ priv->old_clip_mask = g_object_ref (priv->clip_mask);
+ new_mask = gdk_pixmap_new (priv->old_clip_mask, w, h, -1);
+ tmp_gc = _gdk_drawable_get_scratch_gc ((GdkDrawable *)new_mask, FALSE);
+
+ gdk_gc_set_foreground (tmp_gc, &black);
+ gdk_draw_rectangle (new_mask, tmp_gc, TRUE, 0, 0, -1, -1);
+ _gdk_gc_set_clip_region_internal (tmp_gc, region, TRUE); /* Takes ownership of region */
+ gdk_draw_drawable (new_mask,
+ tmp_gc,
+ priv->old_clip_mask,
+ 0, 0,
+ 0, 0,
+ -1, -1);
+ gdk_gc_set_clip_region (tmp_gc, NULL);
+ gdk_gc_set_clip_mask (gc, new_mask);
+ g_object_unref (new_mask);
+ }
+ else if (overlap == GDK_OVERLAP_RECTANGLE_OUT)
+ {
+ /* No intersection, set empty clip region */
+ GdkRegion *empty = gdk_region_new ();
+
+ gdk_region_destroy (region);
+ priv->old_clip_mask = g_object_ref (priv->clip_mask);
+ priv->clip_region = empty;
+ _gdk_windowing_gc_set_clip_region (gc, empty, FALSE);
+ }
+ else
+ {
+ /* Completely inside region, don't set unnecessary clip */
+ gdk_region_destroy (region);
+ return;
+ }
+ }
+ else
+ {
+ priv->old_clip_region = priv->clip_region;
+ priv->clip_region = region;
+ if (priv->old_clip_region)
+ gdk_region_intersect (region, priv->old_clip_region);
+
+ _gdk_windowing_gc_set_clip_region (gc, priv->clip_region, FALSE);
+ }
+
+ priv->region_tag_applied = region_tag;
+ priv->region_tag_offset_x = offset_x;
+ priv->region_tag_offset_y = offset_y;
+}
+
+void
+_gdk_gc_remove_drawable_clip (GdkGC *gc)
+{
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ if (priv->region_tag_applied)
+ {
+ priv->region_tag_applied = 0;
+ if (priv->old_clip_mask)
+ {
+ gdk_gc_set_clip_mask (gc, priv->old_clip_mask);
+ g_object_unref (priv->old_clip_mask);
+ priv->old_clip_mask = NULL;
+
+ if (priv->clip_region)
+ {
+ g_object_unref (priv->clip_region);
+ priv->clip_region = NULL;
+ }
+ }
+ else
+ {
+ _gdk_gc_set_clip_region_real (gc, priv->old_clip_region, FALSE);
+ priv->old_clip_region = NULL;
+ }
+ }
+}
+
+/**
+ * gdk_gc_set_clip_rectangle:
+ * @gc: a #GdkGC.
+ * @rectangle: the rectangle to clip to.
+ *
+ * Sets the clip mask for a graphics context from a
+ * rectangle. The clip mask is interpreted relative to the clip
+ * origin. (See gdk_gc_set_clip_origin()).
+ **/
+void
+gdk_gc_set_clip_rectangle (GdkGC *gc,
+ const GdkRectangle *rectangle)
+{
+ GdkRegion *region;
+
+ g_return_if_fail (GDK_IS_GC (gc));
+
+ _gdk_gc_remove_drawable_clip (gc);
+
+ if (rectangle)
+ region = gdk_region_rectangle (rectangle);
+ else
+ region = NULL;
+
+ _gdk_gc_set_clip_region_real (gc, region, TRUE);
+}
+
+/**
+ * gdk_gc_set_clip_region:
+ * @gc: a #GdkGC.
+ * @region: the #GdkRegion.
+ *
+ * Sets the clip mask for a graphics context from a region structure.
+ * The clip mask is interpreted relative to the clip origin. (See
+ * gdk_gc_set_clip_origin()).
+ **/
+void
+gdk_gc_set_clip_region (GdkGC *gc,
+ const GdkRegion *region)
+{
+ GdkRegion *copy;
+
+ g_return_if_fail (GDK_IS_GC (gc));
+
+ _gdk_gc_remove_drawable_clip (gc);
+
+ if (region)
+ copy = gdk_region_copy (region);
+ else
+ copy = NULL;
+
+ _gdk_gc_set_clip_region_real (gc, copy, TRUE);
+}
+
+/**
+ * _gdk_gc_get_clip_region:
+ * @gc: a #GdkGC
+ *
+ * Gets the current clip region for @gc, if any.
+ *
+ * Return value: the clip region for the GC, or %NULL.
+ * (if a clip mask is set, the return will be %NULL)
+ * This value is owned by the GC and must not be freed.
+ **/
+GdkRegion *
+_gdk_gc_get_clip_region (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), NULL);
+
+ return GDK_GC_GET_PRIVATE (gc)->clip_region;
+}
+
+/**
+ * _gdk_gc_get_clip_mask:
+ * @gc: a #GdkGC
+ *
+ * Gets the current clip mask for @gc, if any.
+ *
+ * Return value: the clip mask for the GC, or %NULL.
+ * (if a clip region is set, the return will be %NULL)
+ * This value is owned by the GC and must not be freed.
+ **/
+GdkBitmap *
+_gdk_gc_get_clip_mask (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), NULL);
+
+ return GDK_GC_GET_PRIVATE (gc)->clip_mask;
+}
+
+/**
+ * _gdk_gc_get_fill:
+ * @gc: a #GdkGC
+ *
+ * Gets the current file style for the GC
+ *
+ * Return value: the file style for the GC
+ **/
+GdkFill
+_gdk_gc_get_fill (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), GDK_SOLID);
+
+ return GDK_GC_GET_PRIVATE (gc)->fill;
+}
+
+gboolean
+_gdk_gc_get_exposures (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), FALSE);
+
+ return GDK_GC_GET_PRIVATE (gc)->exposures;
+}
+
+/**
+ * _gdk_gc_get_tile:
+ * @gc: a #GdkGC
+ *
+ * Gets the tile pixmap for @gc, if any
+ *
+ * Return value: the tile set on the GC, or %NULL. The
+ * value is owned by the GC and must not be freed.
+ **/
+GdkPixmap *
+_gdk_gc_get_tile (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), NULL);
+
+ return GDK_GC_GET_PRIVATE (gc)->tile;
+}
+
+/**
+ * _gdk_gc_get_stipple:
+ * @gc: a #GdkGC
+ *
+ * Gets the stipple pixmap for @gc, if any
+ *
+ * Return value: the stipple set on the GC, or %NULL. The
+ * value is owned by the GC and must not be freed.
+ **/
+GdkBitmap *
+_gdk_gc_get_stipple (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), NULL);
+ return GDK_GC_GET_PRIVATE (gc)->stipple;
+}
+
+/**
+ * _gdk_gc_get_fg_pixel:
+ * @gc: a #GdkGC
+ *
+ * Gets the foreground pixel value for @gc. If the
+ * foreground pixel has never been set, returns the
+ * default value 0.
+ *
+ * Return value: the foreground pixel value of the GC
+ **/
+guint32
+_gdk_gc_get_fg_pixel (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), 0);
+
+ return GDK_GC_GET_PRIVATE (gc)->fg_pixel;
+}
+
+/**
+ * _gdk_gc_get_bg_pixel:
+ * @gc: a #GdkGC
+ *
+ * Gets the background pixel value for @gc.If the
+ * foreground pixel has never been set, returns the
+ * default value 1.
+ *
+ * Return value: the foreground pixel value of the GC
+ **/
+guint32
+_gdk_gc_get_bg_pixel (GdkGC *gc)
+{
+ g_return_val_if_fail (GDK_IS_GC (gc), 0);
+
+ return GDK_GC_GET_PRIVATE (gc)->bg_pixel;
+}
+
+/**
+ * gdk_gc_set_subwindow:
+ * @gc: a #GdkGC.
+ * @mode: the subwindow mode.
+ *
+ * Sets how drawing with this GC on a window will affect child
+ * windows of that window.
+ **/
void
gdk_gc_set_subwindow (GdkGC *gc,
GdkSubwindowMode mode)
{
GdkGCValues values;
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
g_return_if_fail (GDK_IS_GC (gc));
+ /* This could get called a lot to reset the subwindow mode in
+ the client side clipping, so bail out early */
+ if (priv->subwindow_mode == mode)
+ return;
+
values.subwindow_mode = mode;
gdk_gc_set_values (gc, &values, GDK_GC_SUBWINDOW);
}
+GdkSubwindowMode
+_gdk_gc_get_subwindow (GdkGC *gc)
+{
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ return priv->subwindow_mode;
+}
+
+/**
+ * gdk_gc_set_exposures:
+ * @gc: a #GdkGC.
+ * @exposures: if %TRUE, exposure events will be generated.
+ *
+ * Sets whether copying non-visible portions of a drawable
+ * using this graphics context generate exposure events
+ * for the corresponding regions of the destination
+ * drawable. (See gdk_draw_drawable()).
+ **/
void
gdk_gc_set_exposures (GdkGC *gc,
gboolean exposures)
gdk_gc_set_values (gc, &values, GDK_GC_EXPOSURES);
}
+/**
+ * gdk_gc_set_line_attributes:
+ * @gc: a #GdkGC.
+ * @line_width: the width of lines.
+ * @line_style: the dash-style for lines.
+ * @cap_style: the manner in which the ends of lines are drawn.
+ * @join_style: the in which lines are joined together.
+ *
+ * Sets various attributes of how lines are drawn. See
+ * the corresponding members of #GdkGCValues for full
+ * explanations of the arguments.
+ **/
void
gdk_gc_set_line_attributes (GdkGC *gc,
gint line_width,
GDK_GC_JOIN_STYLE);
}
+/**
+ * gdk_gc_set_dashes:
+ * @gc: a #GdkGC.
+ * @dash_offset: the phase of the dash pattern.
+ * @dash_list: an array of dash lengths.
+ * @n: the number of elements in @dash_list.
+ *
+ * Sets the way dashed-lines are drawn. Lines will be
+ * drawn with alternating on and off segments of the
+ * lengths specified in @dash_list. The manner in
+ * which the on and off segments are drawn is determined
+ * by the @line_style value of the GC. (This can
+ * be changed with gdk_gc_set_line_attributes().)
+ *
+ * The @dash_offset defines the phase of the pattern,
+ * specifying how many pixels into the dash-list the pattern
+ * should actually begin.
+ **/
void
gdk_gc_set_dashes (GdkGC *gc,
gint dash_offset,
}
}
+/**
+ * gdk_gc_copy:
+ * @dst_gc: the destination graphics context.
+ * @src_gc: the source graphics context.
+ *
+ * Copy the set of values from one graphics context
+ * onto another graphics context.
+ **/
+void
+gdk_gc_copy (GdkGC *dst_gc,
+ GdkGC *src_gc)
+{
+ GdkGCPrivate *dst_priv, *src_priv;
+
+ g_return_if_fail (GDK_IS_GC (dst_gc));
+ g_return_if_fail (GDK_IS_GC (src_gc));
+
+ dst_priv = GDK_GC_GET_PRIVATE (dst_gc);
+ src_priv = GDK_GC_GET_PRIVATE (src_gc);
+
+ _gdk_windowing_gc_copy (dst_gc, src_gc);
+
+ dst_gc->clip_x_origin = src_gc->clip_x_origin;
+ dst_gc->clip_y_origin = src_gc->clip_y_origin;
+ dst_gc->ts_x_origin = src_gc->ts_x_origin;
+ dst_gc->ts_y_origin = src_gc->ts_y_origin;
+
+ if (src_gc->colormap)
+ g_object_ref (src_gc->colormap);
+
+ if (dst_gc->colormap)
+ g_object_unref (dst_gc->colormap);
+
+ dst_gc->colormap = src_gc->colormap;
+
+ if (dst_priv->clip_region)
+ gdk_region_destroy (dst_priv->clip_region);
+
+ if (src_priv->clip_region)
+ dst_priv->clip_region = gdk_region_copy (src_priv->clip_region);
+ else
+ dst_priv->clip_region = NULL;
+
+ dst_priv->region_tag_applied = src_priv->region_tag_applied;
+
+ if (dst_priv->old_clip_region)
+ gdk_region_destroy (dst_priv->old_clip_region);
+
+ if (src_priv->old_clip_region)
+ dst_priv->old_clip_region = gdk_region_copy (src_priv->old_clip_region);
+ else
+ dst_priv->old_clip_region = NULL;
+
+ if (src_priv->clip_mask)
+ dst_priv->clip_mask = g_object_ref (src_priv->clip_mask);
+ else
+ dst_priv->clip_mask = NULL;
+
+ if (src_priv->old_clip_mask)
+ dst_priv->old_clip_mask = g_object_ref (src_priv->old_clip_mask);
+ else
+ dst_priv->old_clip_mask = NULL;
+
+ dst_priv->fill = src_priv->fill;
+
+ if (dst_priv->stipple)
+ g_object_unref (dst_priv->stipple);
+ dst_priv->stipple = src_priv->stipple;
+ if (dst_priv->stipple)
+ g_object_ref (dst_priv->stipple);
+
+ if (dst_priv->tile)
+ g_object_unref (dst_priv->tile);
+ dst_priv->tile = src_priv->tile;
+ if (dst_priv->tile)
+ g_object_ref (dst_priv->tile);
+
+ dst_priv->fg_pixel = src_priv->fg_pixel;
+ dst_priv->bg_pixel = src_priv->bg_pixel;
+ dst_priv->subwindow_mode = src_priv->subwindow_mode;
+ dst_priv->exposures = src_priv->exposures;
+}
+
/**
* gdk_gc_set_colormap:
* @gc: a #GdkGC
if (gc->colormap != colormap)
{
if (gc->colormap)
- g_object_unref (G_OBJECT (gc->colormap));
+ g_object_unref (gc->colormap);
gc->colormap = colormap;
- g_object_ref (G_OBJECT (gc->colormap));
+ g_object_ref (gc->colormap);
}
}
* has a colormap, or if a colormap was set explicitely with
* gdk_gc_set_colormap.
*
- * Return value:
+ * Return value: the colormap of @gc, or %NULL if @gc doesn't have one.
**/
GdkColormap *
gdk_gc_get_colormap (GdkGC *gc)
* Calling this function for a GC without a colormap is an error.
**/
void
-gdk_gc_set_rgb_fg_color (GdkGC *gc, GdkColor *color)
+gdk_gc_set_rgb_fg_color (GdkGC *gc,
+ const GdkColor *color)
{
GdkColormap *cmap;
GdkColor tmp_color;
* Calling this function for a GC without a colormap is an error.
**/
void
-gdk_gc_set_rgb_bg_color (GdkGC *gc, GdkColor *color)
+gdk_gc_set_rgb_bg_color (GdkGC *gc,
+ const GdkColor *color)
{
GdkColormap *cmap;
GdkColor tmp_color;
gdk_rgb_find_color (cmap, &tmp_color);
gdk_gc_set_background (gc, &tmp_color);
}
+
+static cairo_surface_t *
+make_stipple_tile_surface (cairo_t *cr,
+ GdkBitmap *stipple,
+ GdkColor *foreground,
+ GdkColor *background)
+{
+ cairo_t *tmp_cr;
+ cairo_surface_t *surface;
+ cairo_surface_t *alpha_surface;
+ gint width, height;
+
+ gdk_drawable_get_size (stipple,
+ &width, &height);
+
+ alpha_surface = _gdk_drawable_ref_cairo_surface (stipple);
+
+ surface = cairo_surface_create_similar (cairo_get_target (cr),
+ CAIRO_CONTENT_COLOR_ALPHA,
+ width, height);
+
+ tmp_cr = cairo_create (surface);
+
+ cairo_set_operator (tmp_cr, CAIRO_OPERATOR_SOURCE);
+
+ if (background)
+ gdk_cairo_set_source_color (tmp_cr, background);
+ else
+ cairo_set_source_rgba (tmp_cr, 0, 0, 0 ,0);
+
+ cairo_paint (tmp_cr);
+
+ cairo_set_operator (tmp_cr, CAIRO_OPERATOR_OVER);
+
+ gdk_cairo_set_source_color (tmp_cr, foreground);
+ cairo_mask_surface (tmp_cr, alpha_surface, 0, 0);
+
+ cairo_destroy (tmp_cr);
+ cairo_surface_destroy (alpha_surface);
+
+ return surface;
+}
+
+static void
+gc_get_foreground (GdkGC *gc,
+ GdkColor *color)
+{
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ color->pixel = priv->bg_pixel;
+
+ if (gc->colormap)
+ gdk_colormap_query_color (gc->colormap, priv->fg_pixel, color);
+ else
+ g_warning ("No colormap in gc_get_foreground");
+}
+
+static void
+gc_get_background (GdkGC *gc,
+ GdkColor *color)
+{
+ GdkGCPrivate *priv = GDK_GC_GET_PRIVATE (gc);
+
+ color->pixel = priv->bg_pixel;
+
+ if (gc->colormap)
+ gdk_colormap_query_color (gc->colormap, priv->bg_pixel, color);
+ else
+ g_warning ("No colormap in gc_get_background");
+}
+
+/**
+ * _gdk_gc_update_context:
+ * @gc: a #GdkGC
+ * @cr: a #cairo_t
+ * @override_foreground: a foreground color to use to override the
+ * foreground color of the GC
+ * @override_stipple: a stipple pattern to use to override the
+ * stipple from the GC. If this is present and the fill mode
+ * of the GC isn't %GDK_STIPPLED or %GDK_OPAQUE_STIPPLED
+ * the fill mode will be forced to %GDK_STIPPLED
+ * @gc_changed: pass %FALSE if the @gc has not changed since the
+ * last call to this function
+ * @target_drawable: The drawable you're drawing in. If passed in
+ * this is used for client side window clip emulation.
+ *
+ * Set the attributes of a cairo context to match those of a #GdkGC
+ * as far as possible. Some aspects of a #GdkGC, such as clip masks
+ * and functions other than %GDK_COPY are not currently handled.
+ **/
+void
+_gdk_gc_update_context (GdkGC *gc,
+ cairo_t *cr,
+ const GdkColor *override_foreground,
+ GdkBitmap *override_stipple,
+ gboolean gc_changed,
+ GdkDrawable *target_drawable)
+{
+ GdkGCPrivate *priv;
+ GdkFill fill;
+ GdkColor foreground;
+ GdkColor background;
+ cairo_surface_t *tile_surface = NULL;
+ GdkBitmap *stipple = NULL;
+
+ g_return_if_fail (GDK_IS_GC (gc));
+ g_return_if_fail (cr != NULL);
+ g_return_if_fail (override_stipple == NULL || GDK_IS_PIXMAP (override_stipple));
+
+ priv = GDK_GC_GET_PRIVATE (gc);
+
+ _gdk_gc_remove_drawable_clip (gc);
+
+ fill = priv->fill;
+ if (override_stipple && fill != GDK_OPAQUE_STIPPLED)
+ fill = GDK_STIPPLED;
+
+ if (fill != GDK_TILED)
+ {
+ if (override_foreground)
+ foreground = *override_foreground;
+ else
+ gc_get_foreground (gc, &foreground);
+ }
+
+ if (fill == GDK_OPAQUE_STIPPLED)
+ gc_get_background (gc, &background);
+
+
+ switch (fill)
+ {
+ case GDK_SOLID:
+ break;
+ case GDK_TILED:
+ if (!priv->tile)
+ fill = GDK_SOLID;
+ break;
+ case GDK_STIPPLED:
+ case GDK_OPAQUE_STIPPLED:
+ if (override_stipple)
+ stipple = override_stipple;
+ else
+ stipple = priv->stipple;
+
+ if (!stipple)
+ fill = GDK_SOLID;
+ break;
+ }
+
+ switch (fill)
+ {
+ case GDK_SOLID:
+ gdk_cairo_set_source_color (cr, &foreground);
+ break;
+ case GDK_TILED:
+ tile_surface = _gdk_drawable_ref_cairo_surface (priv->tile);
+ break;
+ case GDK_STIPPLED:
+ tile_surface = make_stipple_tile_surface (cr, stipple, &foreground, NULL);
+ break;
+ case GDK_OPAQUE_STIPPLED:
+ tile_surface = make_stipple_tile_surface (cr, stipple, &foreground, &background);
+ break;
+ }
+
+ /* Tiles, stipples, and clip regions are all specified in device space,
+ * not user space. For the clip region, we can simply change the matrix,
+ * clip, then clip back, but for the source pattern, we need to
+ * compute the right matrix.
+ *
+ * What we want is:
+ *
+ * CTM_inverse * Pattern_matrix = Translate(- ts_x, - ts_y)
+ *
+ * (So that ts_x, ts_y in device space is taken to 0,0 in pattern
+ * space). So, pattern_matrix = CTM * Translate(- ts_x, - tx_y);
+ */
+
+ if (tile_surface)
+ {
+ cairo_pattern_t *pattern = cairo_pattern_create_for_surface (tile_surface);
+ cairo_matrix_t user_to_device;
+ cairo_matrix_t user_to_pattern;
+ cairo_matrix_t device_to_pattern;
+
+ cairo_get_matrix (cr, &user_to_device);
+ cairo_matrix_init_translate (&device_to_pattern,
+ - gc->ts_x_origin, - gc->ts_y_origin);
+ cairo_matrix_multiply (&user_to_pattern,
+ &user_to_device, &device_to_pattern);
+
+ cairo_pattern_set_matrix (pattern, &user_to_pattern);
+ cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
+ cairo_set_source (cr, pattern);
+
+ cairo_surface_destroy (tile_surface);
+ cairo_pattern_destroy (pattern);
+ }
+
+ if (!gc_changed)
+ return;
+
+ cairo_reset_clip (cr);
+ /* The reset above resets the window clip rect, so we want to re-set that */
+ if (target_drawable && GDK_DRAWABLE_GET_CLASS (target_drawable)->set_cairo_clip)
+ GDK_DRAWABLE_GET_CLASS (target_drawable)->set_cairo_clip (target_drawable, cr);
+
+ if (priv->clip_region)
+ {
+ cairo_save (cr);
+
+ cairo_identity_matrix (cr);
+ cairo_translate (cr, gc->clip_x_origin, gc->clip_y_origin);
+
+ cairo_new_path (cr);
+ gdk_cairo_region (cr, priv->clip_region);
+
+ cairo_restore (cr);
+
+ cairo_clip (cr);
+ }
+
+}
+
+
+#define __GDK_GC_C__
+#include "gdkaliasdef.c"
projects / ~andy / gtk / blobdiff