* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
+#include <config.h>
#include "gdkdrawable.h"
#include "gdkinternals.h"
#include "gdkwindow.h"
-
-static GdkDrawable* gdk_drawable_real_get_composite_drawable (GdkDrawable *drawable,
- gint x,
- gint y,
- gint width,
- gint height,
- gint *composite_x_offset,
- gint *composite_y_offset);
-static GdkRegion * gdk_drawable_real_get_visible_region (GdkDrawable *drawable);
+#include "gdkscreen.h"
+#include "gdk-pixbuf-private.h"
+#include "gdkpixbuf.h"
+
+static GdkImage* gdk_drawable_real_get_image (GdkDrawable *drawable,
+ gint x,
+ gint y,
+ gint width,
+ gint height);
+static GdkDrawable* gdk_drawable_real_get_composite_drawable (GdkDrawable *drawable,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ gint *composite_x_offset,
+ gint *composite_y_offset);
+static GdkRegion * gdk_drawable_real_get_visible_region (GdkDrawable *drawable);
+static void gdk_drawable_real_draw_pixbuf (GdkDrawable *drawable,
+ GdkGC *gc,
+ GdkPixbuf *pixbuf,
+ gint src_x,
+ gint src_y,
+ gint dest_x,
+ gint dest_y,
+ gint width,
+ gint height,
+ GdkRgbDither dither,
+ gint x_dither,
+ gint y_dither);
static void gdk_drawable_class_init (GdkDrawableClass *klass);
object_type = g_type_register_static (G_TYPE_OBJECT,
"GdkDrawable",
- &object_info, 0);
+ &object_info,
+ G_TYPE_FLAG_ABSTRACT);
}
return object_type;
static void
gdk_drawable_class_init (GdkDrawableClass *klass)
{
+ klass->get_image = gdk_drawable_real_get_image;
klass->get_composite_drawable = gdk_drawable_real_get_composite_drawable;
/* Default implementation for clip and visible region is the same */
klass->get_clip_region = gdk_drawable_real_get_visible_region;
klass->get_visible_region = gdk_drawable_real_get_visible_region;
+ klass->draw_pixbuf = gdk_drawable_real_draw_pixbuf;
}
/* Manipulation of drawables
* Fills *@width and *@height with the size of @drawable.
* @width or @height can be %NULL if you only want the other one.
*
+ * On the X11 platform, if @drawable is a #GdkWindow, the returned
+ * size is the size reported in the most-recently-processed configure
+ * event, rather than the current size on the X server.
+ *
**/
void
gdk_drawable_get_size (GdkDrawable *drawable,
return GDK_DRAWABLE_GET_CLASS (drawable)->get_depth (drawable);
}
+/**
+ * gdk_drawable_get_screen:
+ * @drawable: a #GdkDrawable
+ *
+ * Gets the #GdkScreen associated with a #GdkDrawable.
+ *
+ * Return value: the #GdkScreen associated with @drawable
+ *
+ * Since: 2.2
+ **/
+GdkScreen*
+gdk_drawable_get_screen(GdkDrawable *drawable)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ return GDK_DRAWABLE_GET_CLASS (drawable)->get_screen (drawable);
+}
+/**
+ * gdk_drawable_get_display:
+ * @drawable: a #GdkDrawable
+ *
+ * Gets the #GdkDisplay associated with a #GdkDrawable.
+ *
+ * Return value: the #GdkDisplay associated with @drawable
+ *
+ * Since: 2.2
+ **/
+GdkDisplay*
+gdk_drawable_get_display (GdkDrawable *drawable)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ return gdk_screen_get_display (gdk_drawable_get_screen (drawable));
+}
+
/**
* gdk_drawable_set_colormap:
* @drawable: a #GdkDrawable
GdkDrawable*
gdk_drawable_ref (GdkDrawable *drawable)
{
- return (GdkDrawable *) g_object_ref (G_OBJECT (drawable));
+ return (GdkDrawable *) g_object_ref (drawable);
}
/**
{
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
- g_object_unref (G_OBJECT (drawable));
+ g_object_unref (drawable);
}
/* Drawing
*/
+
+/**
+ * gdk_draw_point:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @x: the x coordinate of the point.
+ * @y: the y coordinate of the point.
+ *
+ * Draws a point, using the foreground color and other attributes of
+ * the #GdkGC.
+ **/
void
gdk_draw_point (GdkDrawable *drawable,
GdkGC *gc,
GDK_DRAWABLE_GET_CLASS (drawable)->draw_points (drawable, gc, &point, 1);
}
+/**
+ * gdk_draw_line:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @x1_: the x coordinate of the start point.
+ * @y1_: the y coordinate of the start point.
+ * @x2_: the x coordinate of the end point.
+ * @y2_: the y coordinate of the end point.
+ *
+ * Draws a line, using the foreground color and other attributes of
+ * the #GdkGC.
+ **/
void
gdk_draw_line (GdkDrawable *drawable,
GdkGC *gc,
GDK_DRAWABLE_GET_CLASS (drawable)->draw_segments (drawable, gc, &segment, 1);
}
+/**
+ * gdk_draw_rectangle:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @filled: %TRUE if the rectangle should be filled.
+ * @x: the x coordinate of the left edge of the rectangle.
+ * @y: the y coordinate of the top edge of the rectangle.
+ * @width: the width of the rectangle.
+ * @height: the height of the rectangle.
+ *
+ * Draws a rectangular outline or filled rectangle, using the foreground color
+ * and other attributes of the #GdkGC.
+ *
+ * A rectangle drawn filled is 1 pixel smaller in both dimensions than a
+ * rectangle outlined. Calling
+ * <literal>gdk_draw_rectangle (window, gc, TRUE, 0, 0, 20, 20)</literal>
+ * results in a filled rectangle 20 pixels wide and 20 pixels high. Calling
+ * <literal>gdk_draw_rectangle (window, gc, FALSE, 0, 0, 20, 20)</literal>
+ * results in an outlined rectangle with corners at (0, 0), (0, 20), (20, 20),
+ * and (20, 0), which makes it 21 pixels wide and 21 pixels high.
+ **/
void
gdk_draw_rectangle (GdkDrawable *drawable,
GdkGC *gc,
- gint filled,
+ gboolean filled,
gint x,
gint y,
gint width,
width, height);
}
+/**
+ * gdk_draw_arc:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @filled: %TRUE if the arc should be filled, producing a 'pie slice'.
+ * @x: the x coordinate of the left edge of the bounding rectangle.
+ * @y: the y coordinate of the top edge of the bounding rectangle.
+ * @width: the width of the bounding rectangle.
+ * @height: the height of the bounding rectangle.
+ * @angle1: the start angle of the arc, relative to the 3 o'clock position,
+ * counter-clockwise, in 1/64ths of a degree.
+ * @angle2: the end angle of the arc, relative to @angle1, in 1/64ths
+ * of a degree.
+ *
+ * Draws an arc or a filled 'pie slice'. The arc is defined by the bounding
+ * rectangle of the entire ellipse, and the start and end angles of the part
+ * of the ellipse to be drawn.
+ **/
void
gdk_draw_arc (GdkDrawable *drawable,
GdkGC *gc,
- gint filled,
+ gboolean filled,
gint x,
gint y,
gint width,
x, y, width, height, angle1, angle2);
}
+/**
+ * gdk_draw_polygon:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @filled: %TRUE if the polygon should be filled. The polygon is closed
+ * automatically, connecting the last point to the first point if
+ * necessary.
+ * @points: an array of #GdkPoint structures specifying the points making
+ * up the polygon.
+ * @npoints: the number of points.
+ *
+ * Draws an outlined or filled polygon.
+ **/
void
gdk_draw_polygon (GdkDrawable *drawable,
GdkGC *gc,
- gint filled,
+ gboolean filled,
GdkPoint *points,
gint npoints)
{
*
* Interface changed: add "GdkFont *font" to specify font or fontset explicitely
*/
+/**
+ * gdk_draw_string:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @font: a #GdkFont.
+ * @gc: a #GdkGC.
+ * @x: the x coordinate of the left edge of the text.
+ * @y: the y coordinate of the baseline of the text.
+ * @string: the string of characters to draw.
+ *
+ * Draws a string of characters in the given font or fontset.
+ *
+ * Deprecated: Use gdk_draw_layout() instead.
+ **/
void
gdk_draw_string (GdkDrawable *drawable,
GdkFont *font,
*
* Interface changed: add "GdkFont *font" to specify font or fontset explicitely
*/
+/**
+ * gdk_draw_text:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @font: a #GdkFont.
+ * @gc: a #GdkGC.
+ * @x: the x coordinate of the left edge of the text.
+ * @y: the y coordinate of the baseline of the text.
+ * @text: the characters to draw.
+ * @text_length: the number of characters of @text to draw.
+ *
+ * Draws a number of characters in the given font or fontset.
+ *
+ * Deprecated: Use gdk_draw_layout() instead.
+ **/
void
gdk_draw_text (GdkDrawable *drawable,
GdkFont *font,
GDK_DRAWABLE_GET_CLASS (drawable)->draw_text (drawable, font, gc, x, y, text, text_length);
}
+/**
+ * gdk_draw_text_wc:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @font: a #GdkFont.
+ * @gc: a #GdkGC.
+ * @x: the x coordinate of the left edge of the text.
+ * @y: the y coordinate of the baseline of the text.
+ * @text: the wide characters to draw.
+ * @text_length: the number of characters to draw.
+ *
+ * Draws a number of wide characters using the given font of fontset.
+ * If the font is a 1-byte font, the string is converted into 1-byte
+ * characters (discarding the high bytes) before output.
+ *
+ * Deprecated: Use gdk_draw_layout() instead.
+ **/
void
gdk_draw_text_wc (GdkDrawable *drawable,
GdkFont *font,
GDK_DRAWABLE_GET_CLASS (drawable)->draw_text_wc (drawable, font, gc, x, y, text, text_length);
}
+/**
+ * gdk_draw_drawable:
+ * @drawable: a #GdkDrawable
+ * @gc: a #GdkGC sharing the drawable's visual and colormap
+ * @src: the source #GdkDrawable, which may be the same as @drawable
+ * @xsrc: X position in @src of rectangle to draw
+ * @ysrc: Y position in @src of rectangle to draw
+ * @xdest: X position in @drawable where the rectangle should be drawn
+ * @ydest: Y position in @drawable where the rectangle should be drawn
+ * @width: width of rectangle to draw, or -1 for entire @src width
+ * @height: height of rectangle to draw, or -1 for entire @src height
+ *
+ * Copies the @width x @height region of @src at coordinates (@xsrc,
+ * @ysrc) to coordinates (@xdest, @ydest) in @drawable.
+ * @width and/or @height may be given as -1, in which case the entire
+ * @src drawable will be copied.
+ *
+ * Most fields in @gc are not used for this operation, but notably the
+ * clip mask or clip region will be honored.
+ *
+ * The source and destination drawables must have the same visual and
+ * colormap, or errors will result. (On X11, failure to match
+ * visual/colormap results in a BadMatch error from the X server.)
+ * A common cause of this problem is an attempt to draw a bitmap to
+ * a color drawable. The way to draw a bitmap is to set the
+ * bitmap as a clip mask on your #GdkGC, then use gdk_draw_rectangle()
+ * to draw a rectangle clipped to the bitmap.
+ **/
void
gdk_draw_drawable (GdkDrawable *drawable,
GdkGC *gc,
xdest, ydest,
width, height);
- g_object_unref (G_OBJECT (composite));
+ g_object_unref (composite);
}
+/**
+ * gdk_draw_image:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @image: the #GdkImage to draw.
+ * @xsrc: the left edge of the source rectangle within @image.
+ * @ysrc: the top of the source rectangle within @image.
+ * @xdest: the x coordinate of the destination within @drawable.
+ * @ydest: the y coordinate of the destination within @drawable.
+ * @width: the width of the area to be copied, or -1 to make the area
+ * extend to the right edge of @image.
+ * @height: the height of the area to be copied, or -1 to make the area
+ * extend to the bottom edge of @image.
+ *
+ * Draws a #GdkImage onto a drawable.
+ * The depth of the #GdkImage must match the depth of the #GdkDrawable.
+ **/
void
gdk_draw_image (GdkDrawable *drawable,
GdkGC *gc,
xdest, ydest, width, height);
}
+/**
+ * gdk_draw_pixbuf:
+ * @drawable: Destination drawable.
+ * @gc: a #GdkGC, used for clipping, or %NULL
+ * @pixbuf: a #GdkPixbuf
+ * @src_x: Source X coordinate within pixbuf.
+ * @src_y: Source Y coordinates within pixbuf.
+ * @dest_x: Destination X coordinate within drawable.
+ * @dest_y: Destination Y coordinate within drawable.
+ * @width: Width of region to render, in pixels, or -1 to use pixbuf width.
+ * @height: Height of region to render, in pixels, or -1 to use pixbuf height.
+ * @dither: Dithering mode for #GdkRGB.
+ * @x_dither: X offset for dither.
+ * @y_dither: Y offset for dither.
+ *
+ * Renders a rectangular portion of a pixbuf to a drawable. The destination
+ * drawable must have a colormap. All windows have a colormap, however, pixmaps
+ * only have colormap by default if they were created with a non-%NULL window
+ * argument. Otherwise a colormap must be set on them with
+ * gdk_drawable_set_colormap().
+ *
+ * On older X servers, rendering pixbufs with an alpha channel involves round
+ * trips to the X server, and may be somewhat slow.
+ *
+ * The clip mask of @gc is ignored, but clip rectangles and clip regions work
+ * fine.
+ *
+ * Since: 2.2
+ **/
+void
+gdk_draw_pixbuf (GdkDrawable *drawable,
+ GdkGC *gc,
+ GdkPixbuf *pixbuf,
+ gint src_x,
+ gint src_y,
+ gint dest_x,
+ gint dest_y,
+ gint width,
+ gint height,
+ GdkRgbDither dither,
+ gint x_dither,
+ gint y_dither)
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (gc == NULL || GDK_IS_GC (gc));
+ g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
+
+ if (width == -1)
+ width = gdk_pixbuf_get_width (pixbuf);
+ if (height == -1)
+ height = gdk_pixbuf_get_height (pixbuf);
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_pixbuf (drawable, gc, pixbuf,
+ src_x, src_y, dest_x, dest_y, width, height,
+ dither, x_dither, y_dither);
+}
+
+/**
+ * gdk_draw_points:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @points: an array of #GdkPoint structures.
+ * @npoints: the number of points to be drawn.
+ *
+ * Draws a number of points, using the foreground color and other
+ * attributes of the #GdkGC.
+ **/
void
gdk_draw_points (GdkDrawable *drawable,
GdkGC *gc,
GDK_DRAWABLE_GET_CLASS (drawable)->draw_points (drawable, gc, points, npoints);
}
+/**
+ * gdk_draw_segments:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @segs: an array of #GdkSegment structures specifying the start and
+ * end points of the lines to be drawn.
+ * @nsegs: the number of line segments to draw, i.e. the size of the
+ * @segs array.
+ *
+ * Draws a number of unconnected lines.
+ **/
void
gdk_draw_segments (GdkDrawable *drawable,
GdkGC *gc,
GDK_DRAWABLE_GET_CLASS (drawable)->draw_segments (drawable, gc, segs, nsegs);
}
+/**
+ * gdk_draw_lines:
+ * @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
+ * @gc: a #GdkGC.
+ * @points: an array of #GdkPoint structures specifying the endpoints of the
+ * @npoints: the size of the @points array.
+ *
+ * Draws a series of lines connecting the given points.
+ * The way in which joins between lines are draw is determined by the
+ * #GdkCapStyle value in the #GdkGC. This can be set with
+ * gdk_gc_set_line_attributes().
+ **/
void
gdk_draw_lines (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints)
{
-
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
g_return_if_fail (points != NULL);
g_return_if_fail (GDK_IS_GC (gc));
GDK_DRAWABLE_GET_CLASS (drawable)->draw_lines (drawable, gc, points, npoints);
}
+/**
+ * gdk_draw_glyphs:
+ * @drawable: a #GdkDrawable
+ * @gc: a #GdkGC
+ * @font: font to be used
+ * @x: X coordinate of baseline origin
+ * @y: Y coordinate of baseline origin
+ * @glyphs: glyphs to render
+ *
+ * This is a low-level function; 99% of text rendering should be done
+ * using gdk_draw_layout() instead.
+ *
+ * A glyph is a character in a font. This function draws a sequence of
+ * glyphs. To obtain a sequence of glyphs you have to understand a
+ * lot about internationalized text handling, which you don't want to
+ * understand; thus, use gdk_draw_layout() instead of this function,
+ * gdk_draw_layout() handles the details.
+ *
+ **/
void
gdk_draw_glyphs (GdkDrawable *drawable,
GdkGC *gc,
}
+/**
+ * gdk_drawable_copy_to_image:
+ * @drawable: a #GdkDrawable
+ * @image: a #GdkDrawable, or %NULL if a new @image should be created.
+ * @src_x: x coordinate on @drawable
+ * @src_y: y coordinate on @drawable
+ * @dest_x: x coordinate within @image. Must be 0 if @image is %NULL
+ * @dest_y: y coordinate within @image. Must be 0 if @image is %NULL
+ * @width: width of region to get
+ * @height: height or region to get
+ *
+ * Copies a portion of @drawable into the client side image structure
+ * @image. If @image is %NULL, creates a new image of size @width x @height
+ * and copies into that. See gdk_drawable_get_image() for further details.
+ *
+ * Return value: @image, or a new a #GdkImage containing the contents
+ * of @drawable
+ *
+ * Since: 2.4
+ **/
+GdkImage*
+gdk_drawable_copy_to_image (GdkDrawable *drawable,
+ GdkImage *image,
+ gint src_x,
+ gint src_y,
+ gint dest_x,
+ gint dest_y,
+ gint width,
+ gint height)
+{
+ GdkDrawable *composite;
+ gint composite_x_offset = 0;
+ gint composite_y_offset = 0;
+ GdkImage *retval;
+ GdkColormap *cmap;
+
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+ g_return_val_if_fail (src_x >= 0, NULL);
+ g_return_val_if_fail (src_y >= 0, NULL);
+
+ /* FIXME? Note race condition since we get the size then
+ * get the image, and the size may have changed.
+ */
+
+ if (width < 0 || height < 0)
+ gdk_drawable_get_size (drawable,
+ width < 0 ? &width : NULL,
+ height < 0 ? &height : NULL);
+
+ composite =
+ GDK_DRAWABLE_GET_CLASS (drawable)->get_composite_drawable (drawable,
+ src_x, src_y,
+ width, height,
+ &composite_x_offset,
+ &composite_y_offset);
+
+ retval = GDK_DRAWABLE_GET_CLASS (composite)->_copy_to_image (composite,
+ image,
+ src_x - composite_x_offset,
+ src_y - composite_y_offset,
+ dest_x, dest_y,
+ width, height);
+
+ g_object_unref (composite);
+
+ if (!image && retval)
+ {
+ cmap = gdk_drawable_get_colormap (drawable);
+
+ if (cmap)
+ gdk_image_set_colormap (retval, cmap);
+ }
+
+ return retval;
+}
+
/**
* gdk_drawable_get_image:
* @drawable: a #GdkDrawable
y - composite_y_offset,
width, height);
- g_object_unref (G_OBJECT (composite));
+ g_object_unref (composite);
cmap = gdk_drawable_get_colormap (drawable);
return retval;
}
+static GdkImage*
+gdk_drawable_real_get_image (GdkDrawable *drawable,
+ gint x,
+ gint y,
+ gint width,
+ gint height)
+{
+ return gdk_drawable_copy_to_image (drawable, NULL, x, y, 0, 0, width, height);
+}
+
static GdkDrawable*
gdk_drawable_real_get_composite_drawable (GdkDrawable *drawable,
gint x,
*composite_x_offset = 0;
*composite_y_offset = 0;
- return GDK_DRAWABLE (g_object_ref (G_OBJECT (drawable)));
+ return g_object_ref (drawable);
}
/**
return gdk_region_rectangle (&rect);
}
+
+static void
+composite (guchar *src_buf,
+ gint src_rowstride,
+ guchar *dest_buf,
+ gint dest_rowstride,
+ gint width,
+ gint height)
+{
+ guchar *src = src_buf;
+ guchar *dest = dest_buf;
+
+ while (height--)
+ {
+ gint twidth = width;
+ guchar *p = src;
+ guchar *q = dest;
+
+ while (twidth--)
+ {
+ guchar a = p[3];
+ guint t;
+
+ t = a * p[0] + (255 - a) * q[0] + 0x80;
+ q[0] = (t + (t >> 8)) >> 8;
+ t = a * p[1] + (255 - a) * q[1] + 0x80;
+ q[1] = (t + (t >> 8)) >> 8;
+ t = a * p[2] + (255 - a) * q[2] + 0x80;
+ q[2] = (t + (t >> 8)) >> 8;
+
+ p += 4;
+ q += 3;
+ }
+
+ src += src_rowstride;
+ dest += dest_rowstride;
+ }
+}
+
+static void
+composite_0888 (guchar *src_buf,
+ gint src_rowstride,
+ guchar *dest_buf,
+ gint dest_rowstride,
+ GdkByteOrder dest_byte_order,
+ gint width,
+ gint height)
+{
+ guchar *src = src_buf;
+ guchar *dest = dest_buf;
+
+ while (height--)
+ {
+ gint twidth = width;
+ guchar *p = src;
+ guchar *q = dest;
+
+ if (dest_byte_order == GDK_LSB_FIRST)
+ {
+ while (twidth--)
+ {
+ guint t;
+
+ t = p[3] * p[2] + (255 - p[3]) * q[0] + 0x80;
+ q[0] = (t + (t >> 8)) >> 8;
+ t = p[3] * p[1] + (255 - p[3]) * q[1] + 0x80;
+ q[1] = (t + (t >> 8)) >> 8;
+ t = p[3] * p[0] + (255 - p[3]) * q[2] + 0x80;
+ q[2] = (t + (t >> 8)) >> 8;
+ p += 4;
+ q += 4;
+ }
+ }
+ else
+ {
+ while (twidth--)
+ {
+ guint t;
+
+ t = p[3] * p[0] + (255 - p[3]) * q[1] + 0x80;
+ q[1] = (t + (t >> 8)) >> 8;
+ t = p[3] * p[1] + (255 - p[3]) * q[2] + 0x80;
+ q[2] = (t + (t >> 8)) >> 8;
+ t = p[3] * p[2] + (255 - p[3]) * q[3] + 0x80;
+ q[3] = (t + (t >> 8)) >> 8;
+ p += 4;
+ q += 4;
+ }
+ }
+
+ src += src_rowstride;
+ dest += dest_rowstride;
+ }
+}
+
+static void
+composite_565 (guchar *src_buf,
+ gint src_rowstride,
+ guchar *dest_buf,
+ gint dest_rowstride,
+ GdkByteOrder dest_byte_order,
+ gint width,
+ gint height)
+{
+ guchar *src = src_buf;
+ guchar *dest = dest_buf;
+
+ while (height--)
+ {
+ gint twidth = width;
+ guchar *p = src;
+ gushort *q = (gushort *)dest;
+
+ while (twidth--)
+ {
+ guchar a = p[3];
+ guint tr, tg, tb;
+ guint tr1, tg1, tb1;
+ guint tmp = *q;
+
+#if 1
+ /* This is fast, and corresponds to what composite() above does
+ * if we converted to 8-bit first.
+ */
+ tr = (tmp & 0xf800);
+ tr1 = a * p[0] + (255 - a) * ((tr >> 8) + (tr >> 13)) + 0x80;
+ tg = (tmp & 0x07e0);
+ tg1 = a * p[1] + (255 - a) * ((tg >> 3) + (tg >> 9)) + 0x80;
+ tb = (tmp & 0x001f);
+ tb1 = a * p[2] + (255 - a) * ((tb << 3) + (tb >> 2)) + 0x80;
+
+ *q = (((tr1 + (tr1 >> 8)) & 0xf800) |
+ (((tg1 + (tg1 >> 8)) & 0xfc00) >> 5) |
+ ((tb1 + (tb1 >> 8)) >> 11));
+#else
+ /* This version correspond to the result we get with XRENDER -
+ * a bit of precision is lost since we convert to 8 bit after premultiplying
+ * instead of at the end
+ */
+ guint tr2, tg2, tb2;
+ guint tr3, tg3, tb3;
+
+ tr = (tmp & 0xf800);
+ tr1 = (255 - a) * ((tr >> 8) + (tr >> 13)) + 0x80;
+ tr2 = a * p[0] + 0x80;
+ tr3 = ((tr1 + (tr1 >> 8)) >> 8) + ((tr2 + (tr2 >> 8)) >> 8);
+
+ tg = (tmp & 0x07e0);
+ tg1 = (255 - a) * ((tg >> 3) + (tg >> 9)) + 0x80;
+ tg2 = a * p[0] + 0x80;
+ tg3 = ((tg1 + (tg1 >> 8)) >> 8) + ((tg2 + (tg2 >> 8)) >> 8);
+
+ tb = (tmp & 0x001f);
+ tb1 = (255 - a) * ((tb << 3) + (tb >> 2)) + 0x80;
+ tb2 = a * p[0] + 0x80;
+ tb3 = ((tb1 + (tb1 >> 8)) >> 8) + ((tb2 + (tb2 >> 8)) >> 8);
+
+ *q = (((tr3 & 0xf8) << 8) |
+ ((tg3 & 0xfc) << 3) |
+ ((tb3 >> 3)));
+#endif
+
+ p += 4;
+ q++;
+ }
+
+ src += src_rowstride;
+ dest += dest_rowstride;
+ }
+}
+
+static void
+gdk_drawable_real_draw_pixbuf (GdkDrawable *drawable,
+ GdkGC *gc,
+ GdkPixbuf *pixbuf,
+ gint src_x,
+ gint src_y,
+ gint dest_x,
+ gint dest_y,
+ gint width,
+ gint height,
+ GdkRgbDither dither,
+ gint x_dither,
+ gint y_dither)
+{
+ GdkPixbuf *composited = NULL;
+ gint dwidth, dheight;
+ GdkRegion *clip;
+ GdkRegion *drect;
+ GdkRectangle tmp_rect;
+
+ g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
+ g_return_if_fail (pixbuf->colorspace == GDK_COLORSPACE_RGB);
+ g_return_if_fail (pixbuf->n_channels == 3 || pixbuf->n_channels == 4);
+ g_return_if_fail (pixbuf->bits_per_sample == 8);
+
+ g_return_if_fail (drawable != NULL);
+
+ if (width == -1)
+ width = pixbuf->width;
+ if (height == -1)
+ height = pixbuf->height;
+
+ g_return_if_fail (width >= 0 && height >= 0);
+ g_return_if_fail (src_x >= 0 && src_x + width <= pixbuf->width);
+ g_return_if_fail (src_y >= 0 && src_y + height <= pixbuf->height);
+
+ /* Clip to the drawable; this is required for get_from_drawable() so
+ * can't be done implicitly
+ */
+
+ if (dest_x < 0)
+ {
+ src_x -= dest_x;
+ width += dest_x;
+ dest_x = 0;
+ }
+
+ if (dest_y < 0)
+ {
+ src_y -= dest_y;
+ height += dest_y;
+ dest_y = 0;
+ }
+
+ gdk_drawable_get_size (drawable, &dwidth, &dheight);
+
+ if ((dest_x + width) > dwidth)
+ width = dwidth - dest_x;
+
+ if ((dest_y + height) > dheight)
+ height = dheight - dest_y;
+
+ if (width <= 0 || height <= 0)
+ return;
+
+ /* Clip to the clip region; this avoids getting more
+ * image data from the server than we need to.
+ */
+
+ tmp_rect.x = dest_x;
+ tmp_rect.y = dest_y;
+ tmp_rect.width = width;
+ tmp_rect.height = height;
+
+ drect = gdk_region_rectangle (&tmp_rect);
+ clip = gdk_drawable_get_clip_region (drawable);
+
+ gdk_region_intersect (drect, clip);
+
+ gdk_region_get_clipbox (drect, &tmp_rect);
+
+ gdk_region_destroy (drect);
+ gdk_region_destroy (clip);
+
+ if (tmp_rect.width == 0 ||
+ tmp_rect.height == 0)
+ return;
+
+ /* Actually draw */
+ if (!gc)
+ gc = _gdk_drawable_get_scratch_gc (drawable, FALSE);
+
+ if (pixbuf->has_alpha)
+ {
+ GdkVisual *visual = gdk_drawable_get_visual (drawable);
+ void (*composite_func) (guchar *src_buf,
+ gint src_rowstride,
+ guchar *dest_buf,
+ gint dest_rowstride,
+ GdkByteOrder dest_byte_order,
+ gint width,
+ gint height) = NULL;
+
+ /* First we see if we have a visual-specific composition function that can composite
+ * the pixbuf data directly onto the image
+ */
+ if (visual)
+ {
+ gint bits_per_pixel = _gdk_windowing_get_bits_for_depth (gdk_drawable_get_display (drawable),
+ visual->depth);
+
+ if (visual->byte_order == (G_BYTE_ORDER == G_BIG_ENDIAN ? GDK_MSB_FIRST : GDK_LSB_FIRST) &&
+ visual->depth == 16 &&
+ visual->red_mask == 0xf800 &&
+ visual->green_mask == 0x07e0 &&
+ visual->blue_mask == 0x001f)
+ composite_func = composite_565;
+ else if (visual->depth == 24 && bits_per_pixel == 32 &&
+ visual->red_mask == 0xff0000 &&
+ visual->green_mask == 0x00ff00 &&
+ visual->blue_mask == 0x0000ff)
+ composite_func = composite_0888;
+ }
+
+ /* We can't use our composite func if we are required to dither
+ */
+ if (composite_func && !(dither == GDK_RGB_DITHER_MAX && visual->depth != 24))
+ {
+ gint x0, y0;
+ for (y0 = 0; y0 < height; y0 += GDK_SCRATCH_IMAGE_HEIGHT)
+ {
+ gint height1 = MIN (height - y0, GDK_SCRATCH_IMAGE_HEIGHT);
+ for (x0 = 0; x0 < width; x0 += GDK_SCRATCH_IMAGE_WIDTH)
+ {
+ gint xs0, ys0;
+
+ gint width1 = MIN (width - x0, GDK_SCRATCH_IMAGE_WIDTH);
+
+ GdkImage *image = _gdk_image_get_scratch (gdk_drawable_get_screen (drawable),
+ width1, height1,
+ gdk_drawable_get_depth (drawable), &xs0, &ys0);
+
+ gdk_drawable_copy_to_image (drawable, image,
+ dest_x + x0, dest_y + y0,
+ xs0, ys0,
+ width1, height1);
+ (*composite_func) (pixbuf->pixels + (src_y + y0) * pixbuf->rowstride + (src_x + x0) * 4,
+ pixbuf->rowstride,
+ (guchar*)image->mem + ys0 * image->bpl + xs0 * image->bpp,
+ image->bpl,
+ visual->byte_order,
+ width1, height1);
+ gdk_draw_image (drawable, gc, image,
+ xs0, ys0,
+ dest_x + x0, dest_y + y0,
+ width1, height1);
+ }
+ }
+
+ goto out;
+ }
+ else
+ {
+ /* No special composition func, convert dest to 24 bit RGB data, composite against
+ * that, and convert back.
+ */
+ composited = gdk_pixbuf_get_from_drawable (NULL,
+ drawable,
+ NULL,
+ dest_x, dest_y,
+ 0, 0,
+ width, height);
+
+ if (composited)
+ composite (pixbuf->pixels + src_y * pixbuf->rowstride + src_x * 4,
+ pixbuf->rowstride,
+ composited->pixels,
+ composited->rowstride,
+ width, height);
+ }
+ }
+
+ if (composited)
+ {
+ src_x = 0;
+ src_y = 0;
+ pixbuf = composited;
+ }
+
+ if (pixbuf->n_channels == 4)
+ {
+ guchar *buf = pixbuf->pixels + src_y * pixbuf->rowstride + src_x * 4;
+
+ gdk_draw_rgb_32_image_dithalign (drawable, gc,
+ dest_x, dest_y,
+ width, height,
+ dither,
+ buf, pixbuf->rowstride,
+ x_dither, y_dither);
+ }
+ else /* n_channels == 3 */
+ {
+ guchar *buf = pixbuf->pixels + src_y * pixbuf->rowstride + src_x * 3;
+
+ gdk_draw_rgb_image_dithalign (drawable, gc,
+ dest_x, dest_y,
+ width, height,
+ dither,
+ buf, pixbuf->rowstride,
+ x_dither, y_dither);
+ }
+
+ out:
+ if (composited)
+ g_object_unref (composited);
+}
+
+/**
+ * _gdk_drawable_get_scratch_gc:
+ * @drawable: A #GdkDrawable
+ * @graphics_exposures: Whether the returned #GdkGC should generate graphics exposures
+ *
+ * Returns a #GdkGC suitable for drawing on @drawable. The #GdkGC has
+ * the standard values for @drawable, except for the graphics_exposures
+ * field which is determined by the @graphics_exposures parameter.
+ *
+ * The foreground color of the returned #GdkGC is undefined. The #GdkGC
+ * must not be altered in any way, except to change its foreground color.
+ *
+ * Return value: A #GdkGC suitable for drawing on @drawable
+ *
+ * Since: 2.4
+ **/
+GdkGC *
+_gdk_drawable_get_scratch_gc (GdkDrawable *drawable,
+ gboolean graphics_exposures)
+{
+ GdkScreen *screen;
+ gint depth;
+
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ screen = gdk_drawable_get_screen (drawable);
+
+ g_return_val_if_fail (!screen->closed, NULL);
+
+ depth = gdk_drawable_get_depth (drawable) - 1;
+
+ if (graphics_exposures)
+ {
+ if (!screen->exposure_gcs[depth])
+ {
+ GdkGCValues values;
+ GdkGCValuesMask mask;
+
+ values.graphics_exposures = TRUE;
+ mask = GDK_GC_EXPOSURES;
+
+ screen->exposure_gcs[depth] =
+ gdk_gc_new_with_values (drawable, &values, mask);
+ }
+
+ return screen->exposure_gcs[depth];
+ }
+ else
+ {
+ if (!screen->normal_gcs[depth])
+ {
+ screen->normal_gcs[depth] =
+ gdk_gc_new (drawable);
+ }
+
+ return screen->normal_gcs[depth];
+ }
+}
projects / ~andy / gtk / blobdiff