* Boston, MA 02111-1307, USA.
*/
+#include "config.h"
+#include <math.h>
+#include <pango/pangocairo.h>
+#include "gdkcairo.h"
#include "gdkcolor.h"
#include "gdkgc.h"
+#include "gdkinternals.h"
#include "gdkpango.h"
#include "gdkrgb.h"
#include "gdkprivate.h"
+#include "gdkscreen.h"
+#include "gdkintl.h"
+#include "gdkalias.h"
#define GDK_INFO_KEY "gdk-info"
-typedef struct _GdkPangoContextInfo GdkPangoContextInfo;
+/* We have various arrays indexed by render part; if PangoRenderPart
+ * is extended, we want to make sure not to overwrite the end of
+ * those arrays.
+ */
+#define MAX_RENDER_PART PANGO_RENDER_PART_STRIKETHROUGH
-struct _GdkPangoContextInfo
+struct _GdkPangoRendererPrivate
{
- GdkColormap *colormap;
+ GdkScreen *screen;
+
+ /* GdkPangoRenderer specific state */
+ PangoColor override_color[MAX_RENDER_PART + 1];
+ gboolean override_color_set[MAX_RENDER_PART + 1];
+
+ GdkBitmap *stipple[MAX_RENDER_PART + 1];
+ PangoColor emboss_color;
+ gboolean embossed;
+
+ cairo_t *cr;
+ PangoRenderPart last_part;
+
+ /* Current target */
+ GdkDrawable *drawable;
+ GdkGC *base_gc;
+
+ gboolean gc_changed;
};
static PangoAttrType gdk_pango_attr_stipple_type;
static PangoAttrType gdk_pango_attr_embossed_type;
+static PangoAttrType gdk_pango_attr_emboss_color_type;
-static void gdk_pango_get_item_properties (PangoItem *item,
- PangoUnderline *uline,
- gboolean *strikethrough,
- gint *rise,
- PangoColor *fg_color,
- gboolean *fg_set,
- PangoColor *bg_color,
- gboolean *bg_set,
- gboolean *embossed,
- GdkBitmap **stipple,
- gboolean *shape_set,
- PangoRectangle *ink_rect,
- PangoRectangle *logical_rect);
+enum {
+ PROP_0,
+ PROP_SCREEN
+};
+
+G_DEFINE_TYPE (GdkPangoRenderer, gdk_pango_renderer, PANGO_TYPE_RENDERER)
static void
-gdk_pango_context_destroy (GdkPangoContextInfo *info)
+gdk_pango_renderer_finalize (GObject *object)
{
- gdk_colormap_unref (info->colormap);
- g_free (info);
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (object);
+ GdkPangoRendererPrivate *priv = gdk_renderer->priv;
+ int i;
+
+ if (priv->base_gc)
+ g_object_unref (priv->base_gc);
+ if (priv->drawable)
+ g_object_unref (priv->drawable);
+
+ for (i = 0; i <= MAX_RENDER_PART; i++)
+ if (priv->stipple[i])
+ g_object_unref (priv->stipple[i]);
+
+ G_OBJECT_CLASS (gdk_pango_renderer_parent_class)->finalize (object);
}
-static GdkPangoContextInfo *
-gdk_pango_context_get_info (PangoContext *context, gboolean create)
+static GObject*
+gdk_pango_renderer_constructor (GType type,
+ guint n_construct_properties,
+ GObjectConstructParam *construct_params)
{
- GdkPangoContextInfo *info =
- g_object_get_qdata (G_OBJECT (context),
- g_quark_try_string (GDK_INFO_KEY));
- if (!info && create)
+ GObject *object;
+ GdkPangoRenderer *gdk_renderer;
+
+ object = (* G_OBJECT_CLASS (gdk_pango_renderer_parent_class)->constructor) (type,
+ n_construct_properties,
+ construct_params);
+
+ gdk_renderer = GDK_PANGO_RENDERER (object);
+
+ if (!gdk_renderer->priv->screen)
{
- info = g_new (GdkPangoContextInfo, 1);
- info->colormap = NULL;
+ g_warning ("Screen must be specified at construct time for GdkPangoRenderer");
+ gdk_renderer->priv->screen = gdk_screen_get_default ();
+ }
+
+ return object;
+}
+
+/* Adjusts matrix and color for the renderer to draw the secondary
+ * "shadow" copy for embossed text */
+static void
+emboss_context (GdkPangoRenderer *renderer, cairo_t *cr)
+{
+ GdkPangoRendererPrivate *priv = renderer->priv;
+ cairo_matrix_t tmp_matrix;
+ double red, green, blue;
+
+ /* The gymnastics here to adjust the matrix are because we want
+ * to offset by +1,+1 in device-space, not in user-space,
+ * so we can't just draw the layout at x + 1, y + 1
+ */
+ cairo_get_matrix (cr, &tmp_matrix);
+ tmp_matrix.x0 += 1.0;
+ tmp_matrix.y0 += 1.0;
+ cairo_set_matrix (cr, &tmp_matrix);
+
+ red = (double) priv->emboss_color.red / 65535.;
+ green = (double) priv->emboss_color.green / 65535.;
+ blue = (double) priv->emboss_color.blue / 65535.;
+
+ cairo_set_source_rgb (cr, red, green, blue);
+}
+
+static inline gboolean
+color_equal (const PangoColor *c1, const PangoColor *c2)
+{
+ if (!c1 && !c2)
+ return TRUE;
+
+ if (c1 && c2 &&
+ c1->red == c2->red &&
+ c1->green == c2->green &&
+ c1->blue == c2->blue)
+ return TRUE;
+
+ return FALSE;
+}
+
+static cairo_t *
+get_cairo_context (GdkPangoRenderer *gdk_renderer,
+ PangoRenderPart part)
+{
+ PangoRenderer *renderer = PANGO_RENDERER (gdk_renderer);
+ GdkPangoRendererPrivate *priv = gdk_renderer->priv;
+
+ if (!priv->cr)
+ {
+ const PangoMatrix *matrix;
+
+ priv->cr = gdk_cairo_create (priv->drawable);
+
+ matrix = pango_renderer_get_matrix (renderer);
+ if (matrix)
+ {
+ cairo_matrix_t cairo_matrix;
+
+ cairo_matrix_init (&cairo_matrix,
+ matrix->xx, matrix->yx,
+ matrix->xy, matrix->yy,
+ matrix->x0, matrix->y0);
+ cairo_set_matrix (priv->cr, &cairo_matrix);
+ }
+ }
+
+ if (part != priv->last_part)
+ {
+ PangoColor *pango_color;
+ GdkColor *color;
+ GdkColor tmp_color;
+ gboolean changed;
+
+ pango_color = pango_renderer_get_color (renderer, part);
+
+ if (priv->last_part != -1)
+ changed = priv->gc_changed ||
+ priv->stipple[priv->last_part] != priv->stipple[part] ||
+ !color_equal (pango_color,
+ pango_renderer_get_color (renderer, priv->last_part));
+ else
+ changed = TRUE;
+
+ if (changed)
+ {
+ if (pango_color)
+ {
+ tmp_color.red = pango_color->red;
+ tmp_color.green = pango_color->green;
+ tmp_color.blue = pango_color->blue;
+
+ color = &tmp_color;
+ }
+ else
+ color = NULL;
+
+ _gdk_gc_update_context (priv->base_gc,
+ priv->cr,
+ color,
+ priv->stipple[part],
+ priv->gc_changed);
+ }
+
+ priv->last_part = part;
+ priv->gc_changed = FALSE;
+ }
+
+ return priv->cr;
+}
+
+static void
+gdk_pango_renderer_draw_glyphs (PangoRenderer *renderer,
+ PangoFont *font,
+ PangoGlyphString *glyphs,
+ int x,
+ int y)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+ GdkPangoRendererPrivate *priv = gdk_renderer->priv;
+ cairo_t *cr;
+
+ cr = get_cairo_context (gdk_renderer,
+ PANGO_RENDER_PART_FOREGROUND);
- g_object_set_qdata_full (G_OBJECT (context),
- g_quark_from_static_string (GDK_INFO_KEY),
- info, (GDestroyNotify)gdk_pango_context_destroy);
+ if (priv->embossed)
+ {
+ cairo_save (cr);
+ emboss_context (gdk_renderer, cr);
+ cairo_move_to (cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
+ pango_cairo_show_glyph_string (cr, font, glyphs);
+ cairo_restore (cr);
}
- return info;
+ cairo_move_to (cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
+ pango_cairo_show_glyph_string (cr, font, glyphs);
}
-static GdkGC *
-gdk_pango_get_gc (PangoContext *context,
- PangoColor *fg_color,
- GdkBitmap *stipple,
- GdkGC *base_gc)
+static void
+gdk_pango_renderer_draw_rectangle (PangoRenderer *renderer,
+ PangoRenderPart part,
+ int x,
+ int y,
+ int width,
+ int height)
{
- GdkGC *result;
- GdkPangoContextInfo *info;
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+ GdkPangoRendererPrivate *priv = gdk_renderer->priv;
+ cairo_t *cr;
- g_return_val_if_fail (context != NULL, NULL);
+ cr = get_cairo_context (gdk_renderer, part);
- info = gdk_pango_context_get_info (context, FALSE);
+ if (priv->embossed && part != PANGO_RENDER_PART_BACKGROUND)
+ {
+ cairo_save (cr);
+ emboss_context (gdk_renderer, cr);
+ cairo_rectangle (cr,
+ (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+ (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+
+ cairo_fill (cr);
+ cairo_restore (cr);
+ }
- if (info == NULL || info->colormap == NULL)
+ cairo_rectangle (cr,
+ (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+ (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+ cairo_fill (cr);
+}
+
+static void
+gdk_pango_renderer_draw_error_underline (PangoRenderer *renderer,
+ int x,
+ int y,
+ int width,
+ int height)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+ GdkPangoRendererPrivate *priv = gdk_renderer->priv;
+ cairo_t *cr;
+
+ cr = get_cairo_context (gdk_renderer, PANGO_RENDER_PART_UNDERLINE);
+
+ if (priv->embossed)
{
- g_warning ("you must set the colormap on a PangoContext before using it to draw a layout");
- return NULL;
+ cairo_save (cr);
+ emboss_context (gdk_renderer, cr);
+ pango_cairo_show_error_underline (cr,
+ (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+ (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+ cairo_restore (cr);
}
- result = gdk_gc_new (gdk_parent_root);
- gdk_gc_copy (result, base_gc);
+ pango_cairo_show_error_underline (cr,
+ (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
+ (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
+}
+
+static void
+gdk_pango_renderer_part_changed (PangoRenderer *renderer,
+ PangoRenderPart part)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+
+ if (gdk_renderer->priv->last_part == part)
+ gdk_renderer->priv->last_part = (PangoRenderPart)-1;
+}
+
+static void
+gdk_pango_renderer_begin (PangoRenderer *renderer)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+ GdkPangoRendererPrivate *priv = gdk_renderer->priv;
- if (fg_color)
+ if (!priv->drawable || !priv->base_gc)
{
- GdkColor color;
-
- color.red = fg_color->red;
- color.green = fg_color->green;
- color.blue = fg_color->blue;
+ g_warning ("gdk_pango_renderer_set_drawable() and gdk_pango_renderer_set_drawable()"
+ "must be used to set the target drawable and GC before using the renderer\n");
+ }
+}
+
+static void
+gdk_pango_renderer_end (PangoRenderer *renderer)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+ GdkPangoRendererPrivate *priv = gdk_renderer->priv;
- gdk_rgb_find_color (info->colormap, &color);
- gdk_gc_set_foreground (result, &color);
+ if (priv->cr)
+ {
+ cairo_destroy (priv->cr);
+ priv->cr = NULL;
}
+ priv->last_part = (PangoRenderPart)-1;
+}
- if (stipple)
+static void
+gdk_pango_renderer_prepare_run (PangoRenderer *renderer,
+ PangoLayoutRun *run)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+ gboolean embossed = FALSE;
+ GdkBitmap *stipple = NULL;
+ gboolean changed = FALSE;
+ PangoColor emboss_color;
+ GSList *l;
+ int i;
+
+ emboss_color.red = 0xffff;
+ emboss_color.green = 0xffff;
+ emboss_color.blue = 0xffff;
+
+ for (l = run->item->analysis.extra_attrs; l; l = l->next)
+ {
+ PangoAttribute *attr = l->data;
+
+ /* stipple_type and embossed_type aren't necessarily
+ * initialized, but they are 0, which is an
+ * invalid type so won't occur.
+ */
+ if (attr->klass->type == gdk_pango_attr_stipple_type)
+ {
+ stipple = ((GdkPangoAttrStipple*)attr)->stipple;
+ }
+ else if (attr->klass->type == gdk_pango_attr_embossed_type)
+ {
+ embossed = ((GdkPangoAttrEmbossed*)attr)->embossed;
+ }
+ else if (attr->klass->type == gdk_pango_attr_emboss_color_type)
+ {
+ emboss_color = ((GdkPangoAttrEmbossColor*)attr)->color;
+ }
+ }
+
+ gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_FOREGROUND, stipple);
+ gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_BACKGROUND, stipple);
+ gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_UNDERLINE, stipple);
+ gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_STRIKETHROUGH, stipple);
+
+ if (embossed != gdk_renderer->priv->embossed)
{
- gdk_gc_set_fill (result, GDK_STIPPLED);
- gdk_gc_set_stipple (result, stipple);
+ gdk_renderer->priv->embossed = embossed;
+ changed = TRUE;
}
+
+ if (!color_equal (&gdk_renderer->priv->emboss_color, &emboss_color))
+ {
+ gdk_renderer->priv->emboss_color = emboss_color;
+ changed = TRUE;
+ }
+
+ if (changed)
+ pango_renderer_part_changed (renderer, PANGO_RENDER_PART_FOREGROUND);
+
+ PANGO_RENDERER_CLASS (gdk_pango_renderer_parent_class)->prepare_run (renderer, run);
+
+ for (i = 0; i <= MAX_RENDER_PART; i++)
+ {
+ if (gdk_renderer->priv->override_color_set[i])
+ pango_renderer_set_color (renderer, i, &gdk_renderer->priv->override_color[i]);
+ }
+}
+
+static void
+gdk_pango_renderer_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (object);
+
+ switch (prop_id)
+ {
+ case PROP_SCREEN:
+ gdk_renderer->priv->screen = g_value_get_object (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gdk_pango_renderer_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (object);
+
+ switch (prop_id)
+ {
+ case PROP_SCREEN:
+ g_value_set_object (value, gdk_renderer->priv->screen);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gdk_pango_renderer_init (GdkPangoRenderer *renderer)
+{
+ renderer->priv = G_TYPE_INSTANCE_GET_PRIVATE (renderer,
+ GDK_TYPE_PANGO_RENDERER,
+ GdkPangoRendererPrivate);
+
+ renderer->priv->last_part = (PangoRenderPart)-1;
+ renderer->priv->gc_changed = TRUE;
+}
+
+static void
+gdk_pango_renderer_class_init (GdkPangoRendererClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
- return result;
+ PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
+
+ renderer_class->draw_glyphs = gdk_pango_renderer_draw_glyphs;
+ renderer_class->draw_rectangle = gdk_pango_renderer_draw_rectangle;
+ renderer_class->draw_error_underline = gdk_pango_renderer_draw_error_underline;
+ renderer_class->part_changed = gdk_pango_renderer_part_changed;
+ renderer_class->begin = gdk_pango_renderer_begin;
+ renderer_class->end = gdk_pango_renderer_end;
+ renderer_class->prepare_run = gdk_pango_renderer_prepare_run;
+
+ object_class->finalize = gdk_pango_renderer_finalize;
+ object_class->constructor = gdk_pango_renderer_constructor;
+ object_class->set_property = gdk_pango_renderer_set_property;
+ object_class->get_property = gdk_pango_renderer_get_property;
+
+ g_object_class_install_property (object_class,
+ PROP_SCREEN,
+ g_param_spec_object ("screen",
+ P_("Screen"),
+ P_("the GdkScreen for the renderer"),
+ GDK_TYPE_SCREEN,
+ G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
+ G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
+ G_PARAM_STATIC_BLURB));
+
+ g_type_class_add_private (object_class, sizeof (GdkPangoRendererPrivate));
+}
+
+/**
+ * gdk_pango_renderer_new:
+ * @screen: a #GdkScreen
+ *
+ * Creates a new #PangoRenderer for @screen. Normally you can use the
+ * results of gdk_pango_renderer_get_default() rather than creating a new
+ * renderer.
+ *
+ * Return value: a newly created #PangoRenderer. Free with g_object_unref().
+ *
+ * Since: 2.6
+ **/
+PangoRenderer *
+gdk_pango_renderer_new (GdkScreen *screen)
+{
+ g_return_val_if_fail (screen != NULL, NULL);
+
+ return g_object_new (GDK_TYPE_PANGO_RENDERER,
+ "screen", screen,
+ NULL);
}
static void
-gdk_pango_free_gc (PangoContext *context,
- GdkGC *gc)
+on_renderer_display_closed (GdkDisplay *display,
+ gboolean is_error,
+ GdkPangoRenderer *renderer)
{
- gdk_gc_unref (gc);
+ g_signal_handlers_disconnect_by_func (display,
+ on_renderer_display_closed,
+ renderer);
+ g_object_set_data (G_OBJECT (renderer->priv->screen),
+ g_intern_static_string ("gdk-pango-renderer"), NULL);
}
+/**
+ * gdk_pango_renderer_get_default:
+ * @screen: a #GdkScreen
+ *
+ * Gets the default #PangoRenderer for a screen. This default renderer
+ * is shared by all users of the display, so properties such as the color
+ * or transformation matrix set for the renderer may be overwritten
+ * by functions such as gdk_draw_layout().
+ *
+ * Before using the renderer, you need to call gdk_pango_renderer_set_drawable()
+ * and gdk_pango_renderer_set_gc() to set the drawable and graphics context
+ * to use for drawing.
+ *
+ * Return value: the default #PangoRenderer for @screen. The
+ * renderer is owned by GTK+ and will be kept around until the
+ * screen is closed.
+ *
+ * Since: 2.6
+ **/
+PangoRenderer *
+gdk_pango_renderer_get_default (GdkScreen *screen)
+{
+ PangoRenderer *renderer;
+
+ g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
+
+ renderer = g_object_get_data (G_OBJECT (screen), "gdk-pango-renderer");
+ if (!renderer)
+ {
+ renderer = gdk_pango_renderer_new (screen);
+ g_object_set_data_full (G_OBJECT (screen),
+ g_intern_static_string ("gdk-pango-renderer"), renderer,
+ (GDestroyNotify)g_object_unref);
+
+ g_signal_connect (gdk_screen_get_display (screen), "closed",
+ G_CALLBACK (on_renderer_display_closed), renderer);
+ }
+
+ return renderer;
+}
+
+/**
+ * gdk_pango_renderer_set_drawable:
+ * @gdk_renderer: a #GdkPangoRenderer
+ * @drawable: the new target drawable, or %NULL
+ *
+ * Sets the drawable the renderer draws to.
+ *
+ * Since: 2.6
+ **/
void
-gdk_pango_context_set_colormap (PangoContext *context,
- GdkColormap *colormap)
+gdk_pango_renderer_set_drawable (GdkPangoRenderer *gdk_renderer,
+ GdkDrawable *drawable)
{
- GdkPangoContextInfo *info;
+ GdkPangoRendererPrivate *priv;
- g_return_if_fail (context != NULL);
+ g_return_if_fail (GDK_IS_PANGO_RENDERER (gdk_renderer));
+ g_return_if_fail (drawable == NULL || GDK_IS_DRAWABLE (drawable));
- info = gdk_pango_context_get_info (context, TRUE);
- g_return_if_fail (info != NULL);
+ priv = gdk_renderer->priv;
- if (info->colormap != colormap)
+ if (priv->drawable != drawable)
{
- if (info->colormap)
- gdk_colormap_unref (info->colormap);
+ if (priv->drawable)
+ g_object_unref (priv->drawable);
+ priv->drawable = drawable;
+ if (priv->drawable)
+ g_object_ref (priv->drawable);
+ }
+}
- info->colormap = colormap;
+/**
+ * gdk_pango_renderer_set_gc:
+ * @gdk_renderer: a #GdkPangoRenderer
+ * @gc: the new GC to use for drawing, or %NULL
+ *
+ * Sets the GC the renderer draws with. Note that the GC must not be
+ * modified until it is unset by calling the function again with
+ * %NULL for the @gc parameter, since GDK may make internal copies
+ * of the GC which won't be updated to follow changes to the
+ * original GC.
+ *
+ * Since: 2.6
+ **/
+void
+gdk_pango_renderer_set_gc (GdkPangoRenderer *gdk_renderer,
+ GdkGC *gc)
+{
+ GdkPangoRendererPrivate *priv;
+
+ g_return_if_fail (GDK_IS_PANGO_RENDERER (gdk_renderer));
+ g_return_if_fail (gc == NULL || GDK_IS_GC (gc));
+
+ priv = gdk_renderer->priv;
+
+ if (priv->base_gc != gc)
+ {
+ if (priv->base_gc)
+ g_object_unref (priv->base_gc);
+ priv->base_gc = gc;
+ if (priv->base_gc)
+ g_object_ref (priv->base_gc);
+
+ priv->gc_changed = TRUE;
+ }
+}
+
+
+/**
+ * gdk_pango_renderer_set_stipple:
+ * @gdk_renderer: a #GdkPangoRenderer
+ * @part: the part to render with the stipple
+ * @stipple: the new stipple value.
+ *
+ * Sets the stipple for one render part (foreground, background, underline,
+ * etc.) Note that this is overwritten when iterating through the individual
+ * styled runs of a #PangoLayout or #PangoLayoutLine. This function is thus
+ * only useful when you call low level functions like pango_renderer_draw_glyphs()
+ * directly, or in the 'prepare_run' virtual function of a subclass of
+ * #GdkPangoRenderer.
+ *
+ * Since: 2.6
+ **/
+void
+gdk_pango_renderer_set_stipple (GdkPangoRenderer *gdk_renderer,
+ PangoRenderPart part,
+ GdkBitmap *stipple)
+{
+ g_return_if_fail (GDK_IS_PANGO_RENDERER (gdk_renderer));
+
+ if (part > MAX_RENDER_PART) /* Silently ignore unknown parts */
+ return;
+
+ if (stipple != gdk_renderer->priv->stipple[part])
+ {
+ if (gdk_renderer->priv->stipple[part])
+ g_object_unref (gdk_renderer->priv->stipple[part]);
+
+ gdk_renderer->priv->stipple[part] = stipple;
- if (info->colormap)
- gdk_colormap_ref (info->colormap);
+ if (gdk_renderer->priv->stipple[part])
+ g_object_ref (gdk_renderer->priv->stipple[part]);
+
+ pango_renderer_part_changed (PANGO_RENDERER (gdk_renderer), part);
+ }
+}
+
+/**
+ * gdk_pango_renderer_set_override_color:
+ * @gdk_renderer: a #GdkPangoRenderer
+ * @part: the part to render to set the color of
+ * @color: the color to use, or %NULL to unset a previously
+ * set override color.
+ *
+ * Sets the color for a particular render part (foreground,
+ * background, underline, etc.), overriding any attributes on the layouts
+ * renderered with this renderer.
+ *
+ * Since: 2.6
+ **/
+void
+gdk_pango_renderer_set_override_color (GdkPangoRenderer *gdk_renderer,
+ PangoRenderPart part,
+ const GdkColor *color)
+{
+ GdkPangoRendererPrivate *priv;
+
+ g_return_if_fail (GDK_IS_PANGO_RENDERER (gdk_renderer));
+
+ priv = gdk_renderer->priv;
+
+ if (part > MAX_RENDER_PART) /* Silently ignore unknown parts */
+ return;
+
+ if (color)
+ {
+ priv->override_color[part].red = color->red;
+ priv->override_color[part].green = color->green;
+ priv->override_color[part].blue = color->blue;
+ priv->override_color_set[part] = TRUE;
}
+ else
+ priv->override_color_set[part] = FALSE;
+}
+
+/**
+ * gdk_pango_context_set_colormap:
+ * @context: a #PangoContext
+ * @colormap: a #GdkColormap
+ *
+ * This function used to set the colormap to be used for drawing with
+ * @context. The colormap is now always derived from the graphics
+ * context used for drawing, so calling this function is no longer
+ * necessary.
+ **/
+void
+gdk_pango_context_set_colormap (PangoContext *context,
+ GdkColormap *colormap)
+{
+ g_return_if_fail (PANGO_IS_CONTEXT (context));
+ g_return_if_fail (colormap == NULL || GDK_IS_COLORMAP (colormap));
+}
+
+/* Gets a renderer to draw with, setting the properties of the
+ * renderer and activating it. Note that since we activate the
+ * renderer here, the implicit setting of the matrix that
+ * pango_renderer_draw_layout_[line] normally do when they
+ * activate the renderer is suppressed. */
+static PangoRenderer *
+get_renderer (GdkDrawable *drawable,
+ GdkGC *gc,
+ const GdkColor *foreground,
+ const GdkColor *background)
+{
+ GdkScreen *screen = gdk_drawable_get_screen (drawable);
+ PangoRenderer *renderer = gdk_pango_renderer_get_default (screen);
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+
+ gdk_pango_renderer_set_drawable (gdk_renderer, drawable);
+ gdk_pango_renderer_set_gc (gdk_renderer, gc);
+
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_FOREGROUND,
+ foreground);
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_UNDERLINE,
+ foreground);
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_STRIKETHROUGH,
+ foreground);
+
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_BACKGROUND,
+ background);
+
+ pango_renderer_activate (renderer);
+
+ return renderer;
+}
+
+/* Cleans up the renderer obtained with get_renderer() */
+static void
+release_renderer (PangoRenderer *renderer)
+{
+ GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
+
+ pango_renderer_deactivate (renderer);
+
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_FOREGROUND,
+ NULL);
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_UNDERLINE,
+ NULL);
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_STRIKETHROUGH,
+ NULL);
+ gdk_pango_renderer_set_override_color (gdk_renderer,
+ PANGO_RENDER_PART_BACKGROUND,
+ NULL);
+
+ gdk_pango_renderer_set_drawable (gdk_renderer, NULL);
+ gdk_pango_renderer_set_gc (gdk_renderer, NULL);
}
/**
* Render a #PangoLayoutLine onto a #GdkDrawable, overriding the
* layout's normal colors with @foreground and/or @background.
* @foreground and @background need not be allocated.
+ *
+ * If the layout's #PangoContext has a transformation matrix set, then
+ * @x and @y specify the position of the left edge of the baseline
+ * (left is in before-tranform user coordinates) in after-transform
+ * device coordinates.
*/
void
gdk_draw_layout_line_with_colors (GdkDrawable *drawable,
gint x,
gint y,
PangoLayoutLine *line,
- GdkColor *foreground,
- GdkColor *background)
+ const GdkColor *foreground,
+ const GdkColor *background)
{
- GSList *tmp_list = line->runs;
- PangoRectangle overall_rect;
- PangoRectangle logical_rect;
- PangoRectangle ink_rect;
- PangoContext *context;
- gint x_off = 0;
- gint rise = 0;
- gboolean embossed;
- GdkBitmap *stipple;
-
+ PangoRenderer *renderer;
+ const PangoMatrix *matrix;
+
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
g_return_if_fail (GDK_IS_GC (gc));
g_return_if_fail (line != NULL);
- context = pango_layout_get_context (line->layout);
-
- pango_layout_line_get_extents (line,NULL, &overall_rect);
-
- while (tmp_list)
+ renderer = get_renderer (drawable, gc, foreground, background);
+
+ /* When we have a matrix, we do positioning by adjusting the matrix, and
+ * clamp just pass x=0, y=0 to the lower levels. We don't want to introduce
+ * a matrix when the caller didn't provide one, however, since that adds
+ * lots of floating point arithmetic for each glyph.
+ */
+ matrix = pango_context_get_matrix (pango_layout_get_context (line->layout));
+ if (matrix)
{
- PangoUnderline uline = PANGO_UNDERLINE_NONE;
- PangoLayoutRun *run = tmp_list->data;
- PangoColor fg_color, bg_color;
- gboolean strike, fg_set, bg_set, shape_set;
- GdkGC *fg_gc;
- gint risen_y;
+ PangoMatrix tmp_matrix;
- tmp_list = tmp_list->next;
-
- gdk_pango_get_item_properties (run->item, &uline,
- &strike,
- &rise,
- &fg_color, &fg_set,
- &bg_color, &bg_set,
- &embossed,
- &stipple,
- &shape_set,
- &ink_rect,
- &logical_rect);
-
- /* we subtract the rise because X coordinates are upside down */
- risen_y = y - rise / PANGO_SCALE;
-
- if (!shape_set)
- {
- if (uline == PANGO_UNDERLINE_NONE)
- pango_glyph_string_extents (run->glyphs, run->item->analysis.font,
- NULL, &logical_rect);
- else
- pango_glyph_string_extents (run->glyphs, run->item->analysis.font,
- &ink_rect, &logical_rect);
- }
-
- if (bg_set || background)
- {
- GdkGC *bg_gc;
- PangoColor tmp = bg_color;
-
- if (background)
- {
- tmp.red = background->red;
- tmp.blue = background->blue;
- tmp.green = background->green;
- }
-
- bg_gc = gdk_pango_get_gc (context, &tmp, stipple, gc);
-
- gdk_draw_rectangle (drawable, bg_gc, TRUE,
- x + (x_off + logical_rect.x) / PANGO_SCALE,
- risen_y + overall_rect.y / PANGO_SCALE,
- logical_rect.width / PANGO_SCALE,
- overall_rect.height / PANGO_SCALE);
-
- if (stipple)
- gdk_gc_set_fill (bg_gc, GDK_SOLID);
-
- gdk_pango_free_gc (context, bg_gc);
- }
+ tmp_matrix = *matrix;
+ tmp_matrix.x0 += x;
+ tmp_matrix.y0 += y;
+ pango_renderer_set_matrix (renderer, &tmp_matrix);
- if (fg_set || stipple || foreground)
- {
- PangoColor tmp = fg_color;
-
- if (foreground)
- {
- tmp.red = foreground->red;
- tmp.blue = foreground->blue;
- tmp.green = foreground->green;
- }
-
- fg_gc = gdk_pango_get_gc (context, fg_set ? &tmp : NULL,
- stipple, gc);
- }
- else
- fg_gc = gc;
-
- if (!shape_set)
- {
- gint gx, gy;
+ x = 0;
+ y = 0;
+ }
+ /* Fall back to introduce a matrix if the coords would scale out of range.
+ * The x and y here will be added to in-layout coordinates. So we cannot
+ * support the entire range here safely. So, we just accept the middle half
+ * and use fallback for the rest. */
+ else if (GDK_PANGO_UNITS_OVERFLOWS (x, y))
+ {
+ PangoMatrix tmp_matrix = PANGO_MATRIX_INIT;
+ tmp_matrix.x0 += x;
+ tmp_matrix.y0 += y;
+ pango_renderer_set_matrix (renderer, &tmp_matrix);
- gx = x + x_off / PANGO_SCALE;
- gy = risen_y;
-
- if (embossed)
- {
- PangoColor color = { 65535, 65535, 65535 };
- GdkGC *white_gc = gdk_pango_get_gc (context, &color, stipple, fg_gc);
- gdk_draw_glyphs (drawable, white_gc, run->item->analysis.font,
- gx + 1,
- gy + 1,
- run->glyphs);
- gdk_pango_free_gc (context, white_gc);
- }
-
- gdk_draw_glyphs (drawable, fg_gc, run->item->analysis.font,
- gx, gy,
- run->glyphs);
- }
-
- switch (uline)
- {
- case PANGO_UNDERLINE_NONE:
- break;
- case PANGO_UNDERLINE_DOUBLE:
- gdk_draw_line (drawable, fg_gc,
- x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
- risen_y + 3,
- x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
- risen_y + 3);
- /* Fall through */
- case PANGO_UNDERLINE_SINGLE:
- gdk_draw_line (drawable, fg_gc,
- x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
- risen_y + 1,
- x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
- risen_y + 1);
- break;
- case PANGO_UNDERLINE_LOW:
- gdk_draw_line (drawable, fg_gc,
- x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
- risen_y + (ink_rect.y + ink_rect.height) / PANGO_SCALE + 1,
- x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
- risen_y + (ink_rect.y + ink_rect.height) / PANGO_SCALE + 1);
- break;
- }
+ x = 0;
+ y = 0;
+ }
+ else
+ pango_renderer_set_matrix (renderer, NULL);
- if (strike)
- {
- int centerline = logical_rect.y + logical_rect.height / 2;
-
- gdk_draw_line (drawable, fg_gc,
- x + (x_off + logical_rect.x) / PANGO_SCALE - 1,
- risen_y + centerline / PANGO_SCALE,
- x + (x_off + logical_rect.x + logical_rect.width) / PANGO_SCALE + 1,
- risen_y + centerline / PANGO_SCALE);
- }
-
- if (fg_gc != gc)
- gdk_pango_free_gc (context, fg_gc);
+ pango_renderer_draw_layout_line (renderer, line, x * PANGO_SCALE, y * PANGO_SCALE);
- x_off += logical_rect.width;
- }
+ release_renderer (renderer);
}
/**
- * gdk_draw_layout:
+ * gdk_draw_layout_with_colors:
* @drawable: the drawable on which to draw string
* @gc: base graphics context to use
* @x: the X position of the left of the layout (in pixels)
* Render a #PangoLayout onto a #GdkDrawable, overriding the
* layout's normal colors with @foreground and/or @background.
* @foreground and @background need not be allocated.
+ *
+ * If the layout's #PangoContext has a transformation matrix set, then
+ * @x and @y specify the position of the top left corner of the
+ * bounding box (in device space) of the transformed layout.
+ *
+ * If you're using GTK+, the ususal way to obtain a #PangoLayout
+ * is gtk_widget_create_pango_layout().
*/
void
gdk_draw_layout_with_colors (GdkDrawable *drawable,
int x,
int y,
PangoLayout *layout,
- GdkColor *foreground,
- GdkColor *background)
+ const GdkColor *foreground,
+ const GdkColor *background)
{
- PangoLayoutIter *iter;
+ PangoRenderer *renderer;
+ const PangoMatrix *matrix;
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
g_return_if_fail (GDK_IS_GC (gc));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
- iter = pango_layout_get_iter (layout);
-
- do
+ renderer = get_renderer (drawable, gc, foreground, background);
+
+ /* When we have a matrix, we do positioning by adjusting the matrix, and
+ * clamp just pass x=0, y=0 to the lower levels. We don't want to introduce
+ * a matrix when the caller didn't provide one, however, since that adds
+ * lots of floating point arithmetic for each glyph.
+ */
+ matrix = pango_context_get_matrix (pango_layout_get_context (layout));
+ if (matrix)
{
- PangoRectangle logical_rect;
- PangoLayoutLine *line;
- int baseline;
-
- line = pango_layout_iter_get_line (iter);
+ PangoMatrix tmp_matrix;
+ PangoRectangle rect;
+
+ pango_layout_get_extents (layout, NULL, &rect);
+ pango_matrix_transform_rectangle (matrix, &rect);
+ pango_extents_to_pixels (&rect, NULL);
- pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
- baseline = pango_layout_iter_get_baseline (iter);
+ tmp_matrix = *matrix;
+ tmp_matrix.x0 += x - rect.x;
+ tmp_matrix.y0 += y - rect.y;
+ pango_renderer_set_matrix (renderer, &tmp_matrix);
- gdk_draw_layout_line_with_colors (drawable, gc,
- x + logical_rect.x / PANGO_SCALE,
- y + baseline / PANGO_SCALE,
- line,
- foreground,
- background);
+ x = 0;
+ y = 0;
}
- while (pango_layout_iter_next_line (iter));
+ else if (GDK_PANGO_UNITS_OVERFLOWS (x, y))
+ {
+ PangoMatrix tmp_matrix = PANGO_MATRIX_INIT;
+ tmp_matrix.x0 = x;
+ tmp_matrix.y0 = y;
+ pango_renderer_set_matrix (renderer, &tmp_matrix);
- pango_layout_iter_free (iter);
+ x = 0;
+ y = 0;
+ }
+ else
+ pango_renderer_set_matrix (renderer, NULL);
+
+ pango_renderer_draw_layout (renderer, layout, x * PANGO_SCALE, y * PANGO_SCALE);
+
+ release_renderer (renderer);
}
/**
* @line: a #PangoLayoutLine
*
* Render a #PangoLayoutLine onto an GDK drawable
+ *
+ * If the layout's #PangoContext has a transformation matrix set, then
+ * @x and @y specify the position of the left edge of the baseline
+ * (left is in before-tranform user coordinates) in after-transform
+ * device coordinates.
*/
void
gdk_draw_layout_line (GdkDrawable *drawable,
* @layout: a #PangoLayout
*
* Render a #PangoLayout onto a GDK drawable
+ *
+ * If the layout's #PangoContext has a transformation matrix set, then
+ * @x and @y specify the position of the top left corner of the
+ * bounding box (in device space) of the transformed layout.
+ *
+ * If you're using GTK+, the usual way to obtain a #PangoLayout
+ * is gtk_widget_create_pango_layout().
*/
void
gdk_draw_layout (GdkDrawable *drawable,
gdk_draw_layout_with_colors (drawable, gc, x, y, layout, NULL, NULL);
}
-static void
-gdk_pango_get_item_properties (PangoItem *item,
- PangoUnderline *uline,
- gboolean *strikethrough,
- gint *rise,
- PangoColor *fg_color,
- gboolean *fg_set,
- PangoColor *bg_color,
- gboolean *bg_set,
- gboolean *embossed,
- GdkBitmap **stipple,
- gboolean *shape_set,
- PangoRectangle *ink_rect,
- PangoRectangle *logical_rect)
-{
- GSList *tmp_list = item->analysis.extra_attrs;
-
- if (strikethrough)
- *strikethrough = FALSE;
-
- if (fg_set)
- *fg_set = FALSE;
-
- if (bg_set)
- *bg_set = FALSE;
-
- if (shape_set)
- *shape_set = FALSE;
-
- if (rise)
- *rise = 0;
-
- if (embossed)
- *embossed = FALSE;
-
- if (stipple)
- *stipple = NULL;
-
- while (tmp_list)
- {
- PangoAttribute *attr = tmp_list->data;
-
- switch (attr->klass->type)
- {
- case PANGO_ATTR_UNDERLINE:
- if (uline)
- *uline = ((PangoAttrInt *)attr)->value;
- break;
-
- case PANGO_ATTR_STRIKETHROUGH:
- if (strikethrough)
- *strikethrough = ((PangoAttrInt *)attr)->value;
- break;
-
- case PANGO_ATTR_FOREGROUND:
- if (fg_color)
- *fg_color = ((PangoAttrColor *)attr)->color;
- if (fg_set)
- *fg_set = TRUE;
-
- break;
-
- case PANGO_ATTR_BACKGROUND:
- if (bg_color)
- *bg_color = ((PangoAttrColor *)attr)->color;
- if (bg_set)
- *bg_set = TRUE;
-
- break;
-
- case PANGO_ATTR_SHAPE:
- if (shape_set)
- *shape_set = TRUE;
- if (logical_rect)
- *logical_rect = ((PangoAttrShape *)attr)->logical_rect;
- if (ink_rect)
- *ink_rect = ((PangoAttrShape *)attr)->ink_rect;
- break;
-
- case PANGO_ATTR_RISE:
- if (rise)
- *rise = ((PangoAttrInt *)attr)->value;
- break;
-
- default:
- /* stipple_type and embossed_type aren't necessarily
- * initialized, but they are 0, which is an
- * invalid type so won't occur.
- */
- if (stipple && attr->klass->type == gdk_pango_attr_stipple_type)
- {
- *stipple = ((GdkPangoAttrStipple*)attr)->stipple;
- }
- else if (embossed && attr->klass->type == gdk_pango_attr_embossed_type)
- {
- *embossed = ((GdkPangoAttrEmbossed*)attr)->embossed;
- }
- break;
- }
- tmp_list = tmp_list->next;
- }
-}
-
+/* GdkPangoAttrStipple */
static PangoAttribute *
gdk_pango_attr_stipple_copy (const PangoAttribute *attr)
GdkPangoAttrStipple *st = (GdkPangoAttrStipple*) attr;
if (st->stipple)
- g_object_unref (G_OBJECT (st->stipple));
+ g_object_unref (st->stipple);
g_free (attr);
}
return (PangoAttribute *)result;
}
+/* GdkPangoAttrEmbossed */
+
static PangoAttribute *
gdk_pango_attr_embossed_copy (const PangoAttribute *attr)
{
/**
* gdk_pango_attr_embossed_new:
- * @embossed: a bitmap to be set as embossed
+ * @embossed: if the region should be embossed
*
- * Creates a new attribute containing a embossed bitmap to be used when
- * rendering the text.
+ * Creates a new attribute flagging a region as embossed or not.
*
* Return value: new #PangoAttribute
**/
return (PangoAttribute *)result;
}
+/* GdkPangoAttrEmbossColor */
+
+static PangoAttribute *
+gdk_pango_attr_emboss_color_copy (const PangoAttribute *attr)
+{
+ const GdkPangoAttrEmbossColor *old = (const GdkPangoAttrEmbossColor*) attr;
+ GdkPangoAttrEmbossColor *copy;
+
+ copy = g_new (GdkPangoAttrEmbossColor, 1);
+ copy->attr.klass = old->attr.klass;
+ copy->color = old->color;
+
+ return (PangoAttribute *) copy;
+}
+
+static void
+gdk_pango_attr_emboss_color_destroy (PangoAttribute *attr)
+{
+ g_free (attr);
+}
+
+static gboolean
+gdk_pango_attr_emboss_color_compare (const PangoAttribute *attr1,
+ const PangoAttribute *attr2)
+{
+ const GdkPangoAttrEmbossColor *c1 = (const GdkPangoAttrEmbossColor*) attr1;
+ const GdkPangoAttrEmbossColor *c2 = (const GdkPangoAttrEmbossColor*) attr2;
+
+ return color_equal (&c1->color, &c2->color);
+}
+
+/**
+ * gdk_pango_attr_emboss_color_new:
+ * @color: a GdkColor representing the color to emboss with
+ *
+ * Creates a new attribute specifying the color to emboss text with.
+ *
+ * Return value: new #PangoAttribute
+ *
+ * Since: 2.12
+ **/
+PangoAttribute *
+gdk_pango_attr_emboss_color_new (const GdkColor *color)
+{
+ GdkPangoAttrEmbossColor *result;
+
+ static PangoAttrClass klass = {
+ 0,
+ gdk_pango_attr_emboss_color_copy,
+ gdk_pango_attr_emboss_color_destroy,
+ gdk_pango_attr_emboss_color_compare
+ };
+
+ if (!klass.type)
+ klass.type = gdk_pango_attr_emboss_color_type =
+ pango_attr_type_register ("GdkPangoAttrEmbossColor");
+
+ result = g_new (GdkPangoAttrEmbossColor, 1);
+ result->attr.klass = &klass;
+ result->color.red = color->red;
+ result->color.green = color->green;
+ result->color.blue = color->blue;
+
+ return (PangoAttribute *) result;
+}
+
/* Get a clip region to draw only part of a layout. index_ranges
* contains alternating range starts/stops. The region is the
* region which contains the given ranges, i.e. if you draw with the
* region as clip, only the given ranges are drawn.
*/
+static GdkRegion*
+layout_iter_get_line_clip_region (PangoLayoutIter *iter,
+ gint x_origin,
+ gint y_origin,
+ const gint *index_ranges,
+ gint n_ranges)
+{
+ PangoLayoutLine *line;
+ GdkRegion *clip_region;
+ PangoRectangle logical_rect;
+ gint baseline;
+ gint i;
+
+ line = pango_layout_iter_get_line_readonly (iter);
+
+ clip_region = gdk_region_new ();
+
+ pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
+ baseline = pango_layout_iter_get_baseline (iter);
+
+ i = 0;
+ while (i < n_ranges)
+ {
+ gint *pixel_ranges = NULL;
+ gint n_pixel_ranges = 0;
+ gint j;
+
+ /* Note that get_x_ranges returns layout coordinates
+ */
+ if (index_ranges[i*2+1] >= line->start_index &&
+ index_ranges[i*2] < line->start_index + line->length)
+ pango_layout_line_get_x_ranges (line,
+ index_ranges[i*2],
+ index_ranges[i*2+1],
+ &pixel_ranges, &n_pixel_ranges);
+
+ for (j = 0; j < n_pixel_ranges; j++)
+ {
+ GdkRectangle rect;
+ int x_off, y_off;
+
+ x_off = PANGO_PIXELS (pixel_ranges[2*j] - logical_rect.x);
+ y_off = PANGO_PIXELS (baseline - logical_rect.y);
+
+ rect.x = x_origin + x_off;
+ rect.y = y_origin - y_off;
+ rect.width = PANGO_PIXELS (pixel_ranges[2*j + 1] - logical_rect.x) - x_off;
+ rect.height = PANGO_PIXELS (baseline - logical_rect.y + logical_rect.height) - y_off;
+
+ gdk_region_union_with_rect (clip_region, &rect);
+ }
+
+ g_free (pixel_ranges);
+ ++i;
+ }
+ return clip_region;
+}
/**
* gdk_pango_layout_line_get_clip_region:
* contained inside the line. This is to draw the selection all the way
* to the side of the layout. However, the clip region is in line coordinates,
* not layout coordinates.
+ *
+ * Note that the regions returned correspond to logical extents of the text
+ * ranges, not ink extents. So the drawn line may in fact touch areas out of
+ * the clip region. The clip region is mainly useful for highlightling parts
+ * of text, such as when text is selected.
*
* Return value: a clip region containing the given ranges
**/
gdk_pango_layout_line_get_clip_region (PangoLayoutLine *line,
gint x_origin,
gint y_origin,
- gint *index_ranges,
+ const gint *index_ranges,
gint n_ranges)
{
GdkRegion *clip_region;
- gint i;
- PangoRectangle logical_rect;
PangoLayoutIter *iter;
- gint baseline;
g_return_val_if_fail (line != NULL, NULL);
g_return_val_if_fail (index_ranges != NULL, NULL);
- clip_region = gdk_region_new ();
-
iter = pango_layout_get_iter (line->layout);
- while (pango_layout_iter_get_line (iter) != line)
+ while (pango_layout_iter_get_line_readonly (iter) != line)
pango_layout_iter_next_line (iter);
- pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
- baseline = pango_layout_iter_get_baseline (iter);
-
- i = 0;
- while (i < n_ranges)
- {
- gint *pixel_ranges = NULL;
- gint n_pixel_ranges = 0;
- gint j;
+ clip_region = layout_iter_get_line_clip_region(iter, x_origin, y_origin, index_ranges, n_ranges);
- /* Note that get_x_ranges returns layout coordinates
- */
- pango_layout_line_get_x_ranges (line,
- index_ranges[i*2],
- index_ranges[i*2+1],
- &pixel_ranges, &n_pixel_ranges);
-
- for (j=0; j < n_pixel_ranges; j++)
- {
- GdkRectangle rect;
-
- rect.x = x_origin + pixel_ranges[2*j] / PANGO_SCALE - logical_rect.x / PANGO_SCALE;
- rect.y = y_origin - (baseline / PANGO_SCALE - logical_rect.y / PANGO_SCALE);
- rect.width = (pixel_ranges[2*j + 1] - pixel_ranges[2*j]) / PANGO_SCALE;
- rect.height = logical_rect.height / PANGO_SCALE;
-
- gdk_region_union_with_rect (clip_region, &rect);
- }
-
- g_free (pixel_ranges);
- ++i;
- }
+ pango_layout_iter_free (iter);
return clip_region;
}
* you would pass to gdk_draw_layout_line(). @index_ranges should contain
* ranges of bytes in the layout's text.
*
+ * Note that the regions returned correspond to logical extents of the text
+ * ranges, not ink extents. So the drawn layout may in fact touch areas out of
+ * the clip region. The clip region is mainly useful for highlightling parts
+ * of text, such as when text is selected.
+ *
* Return value: a clip region containing the given ranges
**/
GdkRegion*
gdk_pango_layout_get_clip_region (PangoLayout *layout,
gint x_origin,
gint y_origin,
- gint *index_ranges,
+ const gint *index_ranges,
gint n_ranges)
{
PangoLayoutIter *iter;
do
{
PangoRectangle logical_rect;
- PangoLayoutLine *line;
GdkRegion *line_region;
gint baseline;
- line = pango_layout_iter_get_line (iter);
-
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline (iter);
- line_region = gdk_pango_layout_line_get_clip_region (line,
- x_origin + logical_rect.x / PANGO_SCALE,
- y_origin + baseline / PANGO_SCALE,
- index_ranges,
- n_ranges);
+ line_region = layout_iter_get_line_clip_region(iter,
+ x_origin + PANGO_PIXELS (logical_rect.x),
+ y_origin + PANGO_PIXELS (baseline),
+ index_ranges,
+ n_ranges);
gdk_region_union (clip_region, line_region);
gdk_region_destroy (line_region);
return clip_region;
}
+
+/**
+ * gdk_pango_context_get:
+ *
+ * Creates a #PangoContext for the default GDK screen.
+ *
+ * The context must be freed when you're finished with it.
+ *
+ * When using GTK+, normally you should use gtk_widget_get_pango_context()
+ * instead of this function, to get the appropriate context for
+ * the widget you intend to render text onto.
+ *
+ * The newly created context will have the default font options (see
+ * #cairo_font_options_t) for the default screen; if these options
+ * change it will not be updated. Using gtk_widget_get_pango_context()
+ * is more convenient if you want to keep a context around and track
+ * changes to the screen's font rendering settings.
+ *
+ * Return value: a new #PangoContext for the default display
+ **/
+PangoContext *
+gdk_pango_context_get (void)
+{
+ return gdk_pango_context_get_for_screen (gdk_screen_get_default ());
+}
+
+/**
+ * gdk_pango_context_get_for_screen:
+ * @screen: the #GdkScreen for which the context is to be created.
+ *
+ * Creates a #PangoContext for @screen.
+ *
+ * The context must be freed when you're finished with it.
+ *
+ * When using GTK+, normally you should use gtk_widget_get_pango_context()
+ * instead of this function, to get the appropriate context for
+ * the widget you intend to render text onto.
+ *
+ * The newly created context will have the default font options
+ * (see #cairo_font_options_t) for the screen; if these options
+ * change it will not be updated. Using gtk_widget_get_pango_context()
+ * is more convenient if you want to keep a context around and track
+ * changes to the screen's font rendering settings.
+ *
+ * Return value: a new #PangoContext for @screen
+ *
+ * Since: 2.2
+ **/
+PangoContext *
+gdk_pango_context_get_for_screen (GdkScreen *screen)
+{
+ PangoFontMap *fontmap;
+ PangoContext *context;
+ const cairo_font_options_t *options;
+ double dpi;
+
+ g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
+
+ fontmap = pango_cairo_font_map_get_default ();
+
+ context = pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap));
+
+ options = gdk_screen_get_font_options (screen);
+ pango_cairo_context_set_font_options (context, options);
+
+ dpi = gdk_screen_get_resolution (screen);
+ pango_cairo_context_set_resolution (context, dpi);
+
+ return context;
+}
+
+#define __GDK_PANGO_C__
+#include "gdkaliasdef.c"
projects / ~andy / gtk / blobdiff