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Added gdk_pixbuf_copy_area() to gdk-pixbuf-utils.c and gdk-pixbuf.h.

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Removed some unused variable warnings in gdk-pixbuf-drawable.c.
This commit is contained in:
Cody Russell
2000-01-13 07:24:49 +00:00
parent b09b772727
commit 7bfdf70ae1
3 changed files with 69 additions and 5 deletions
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6
demos/testpixbuf-drawable.c
View File

@@ -12,7 +12,6 @@ void expose_cb(GtkWidget *drawing_area, GdkEventExpose *evt, gpointer
data)
{
GdkPixbuf *pixbuf;
gint x1, y1, x2, y2;
pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
"pixbuf");
@@ -44,10 +43,11 @@ data)
pixbuf->art_pixbuf->rowstride);
}
}
void configure_cb(GtkWidget *drawing_area, GdkEventConfigure *evt,
gpointer data)
{
GdkPixbuf *pixbuf, spb;
GdkPixbuf *pixbuf;
pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
"pixbuf");
@@ -67,8 +67,6 @@ int main(int argc, char **argv)
GtkWidget *vbox;
GtkWidget *drawing_area;
GdkPixbuf *pixbuf;
gint width, height;
gint x, y;
gtk_init(&argc, &argv);
gdk_rgb_set_verbose(TRUE);

61
gdk-pixbuf/gdk-pixbuf-util.c
View File

@@ -2,7 +2,8 @@
*
* Copyright (C) 1999 The Free Software Foundation
*
* Author: Federico Mena-Quintero <federico@gimp.org>
* Authors: Federico Mena-Quintero <federico@gimp.org>
* Cody Russell <bratsche@dfw.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@@ -93,3 +94,61 @@ gdk_pixbuf_add_alpha (GdkPixbuf *pixbuf, gboolean substitute_color, guchar r, gu
return new_pixbuf;
}
/**
* gdk_pixbuf_copy_area:
* @src_pixbuf: The pixbuf to be copied.
* @src_x: The X coordinate of the upper left corner of the area to copy.
* @src_y: The Y coordinate of the upper left corner of the area to copy.
* @width: The width of the area to copy.
* @height: The height of the area to copy.
* @dest_pixbuf: The pixbuf to store the copy in.
* @dest_x: X coordinate for the upper left corner of the rectangle to draw to in @dest_pixbuf.
* @dest_y: Y coordinate for the upper left corner of the rectangle to draw to in @dest_pixbuf.
*
* Takes a rectangle area beginning at (@src_x, @src_y) @width pixels wide
* and @height pixels high from @src_pixbuf and copy it into @dest_pixbuf
* at (@dest_x, @dest_y). @dest_pixbuf must already be created and must be
* large enough to hold the requested area.
*
* Return value: void
**/
void gdk_pixbuf_copy_area(GdkPixbuf *src_pixbuf,
gint src_x, gint src_y,
gint width, gint height,
GdkPixbuf *dest_pixbuf,
gint dest_x, gint dest_y)
{
gint src_width, src_height, dest_width, dest_height;
/* Ensure that we have a source pixbuf, and that the requested
* area is not larger than that pixbuf.
*/
g_return_if_fail(src_pixbuf != NULL);
src_width = gdk_pixbuf_get_width(src_pixbuf);
src_height = gdk_pixbuf_get_height(src_pixbuf);
g_return_if_fail(src_x >= 0 && width <= src_width);
g_return_if_fail(src_y >= 0 && height <= src_height);
/* Ensure that we have a destination pixbuf, and that the
* requested area is not larger than that pixbuf.
*/
g_return_if_fail(dest_pixbuf != NULL);
dest_width = gdk_pixbuf_get_width(dest_pixbuf);
dest_height = gdk_pixbuf_get_height(dest_pixbuf);
g_return_if_fail(dest_x >= 0 && width <= dest_width);
g_return_if_fail(dest_y >= 0 && height <= dest_height);
/* Scale 1:1 the source pixbuf into the destination pixbuf. */
gdk_pixbuf_scale(src_pixbuf,
dest_pixbuf,
dest_x, dest_y,
width, height,
(double)(dest_x - src_x),
(double)(dest_y - src_y),
1., 1., ART_FILTER_NEAREST);
}

7
gdk-pixbuf/gdk-pixbuf.h
View File

@@ -163,6 +163,13 @@ GdkPixbuf *gdk_pixbuf_get_from_drawable (GdkPixbuf *dest,
int dest_x, int dest_y,
int width, int height);
/* Copy an area of a pixbuf into another one */
void gdk_pixbuf_copy_area (GdkPixbuf *src_pixbuf,
gint src_x, gint src_y,
gint width, gint height,
GdkPixbuf *dest_pixbuf,
gint dest_x, gint dest_y);
/* Scaling */
void gdk_pixbuf_scale (GdkPixbuf *src,