--- /dev/null
+/* Libart_LGPL - library of basic graphic primitives
+ * Copyright (C) 1998 Raph Levien
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "art_pixbuf.h"
+
+#include "art_misc.h"
+#include <string.h>
+
+/**
+ * art_pixbuf_new_rgb_dnotify: Create a new RGB #ArtPixBuf with explicit destroy notification.
+ * @pixels: A buffer containing the actual pixel data.
+ * @width: The width of the pixbuf.
+ * @height: The height of the pixbuf.
+ * @rowstride: The rowstride of the pixbuf.
+ * @dfunc_data: The private data passed to @dfunc.
+ * @dfunc: The destroy notification function.
+ *
+ * Creates a generic data structure for holding a buffer of RGB
+ * pixels. It is possible to think of an #ArtPixBuf as a
+ * virtualization over specific pixel buffer formats.
+ *
+ * @dfunc is called with @dfunc_data and @pixels as arguments when the
+ * #ArtPixBuf is destroyed. Using a destroy notification function
+ * allows a wide range of memory management disciplines for the pixel
+ * memory. A NULL value for @dfunc is also allowed and means that no
+ * special action will be taken on destruction.
+ *
+ * Return value: The newly created #ArtPixBuf.
+ **/
+ArtPixBuf *
+art_pixbuf_new_rgb_dnotify (art_u8 *pixels, int width, int height, int rowstride,
+ void *dfunc_data, ArtDestroyNotify dfunc)
+{
+ ArtPixBuf *pixbuf;
+
+ pixbuf = art_new (ArtPixBuf, 1);
+
+ pixbuf->format = ART_PIX_RGB;
+ pixbuf->n_channels = 3;
+ pixbuf->has_alpha = 0;
+ pixbuf->bits_per_sample = 8;
+
+ pixbuf->pixels = (art_u8 *) pixels;
+ pixbuf->width = width;
+ pixbuf->height = height;
+ pixbuf->rowstride = rowstride;
+ pixbuf->destroy_data = dfunc_data;
+ pixbuf->destroy = dfunc;
+
+ return pixbuf;
+}
+
+/**
+ * art_pixbuf_new_rgba_dnotify: Create a new RGBA #ArtPixBuf with explicit destroy notification.
+ * @pixels: A buffer containing the actual pixel data.
+ * @width: The width of the pixbuf.
+ * @height: The height of the pixbuf.
+ * @rowstride: The rowstride of the pixbuf.
+ * @dfunc_data: The private data passed to @dfunc.
+ * @dfunc: The destroy notification function.
+ *
+ * Creates a generic data structure for holding a buffer of RGBA
+ * pixels. It is possible to think of an #ArtPixBuf as a
+ * virtualization over specific pixel buffer formats.
+ *
+ * @dfunc is called with @dfunc_data and @pixels as arguments when the
+ * #ArtPixBuf is destroyed. Using a destroy notification function
+ * allows a wide range of memory management disciplines for the pixel
+ * memory. A NULL value for @dfunc is also allowed and means that no
+ * special action will be taken on destruction.
+ *
+ * Return value: The newly created #ArtPixBuf.
+ **/
+ArtPixBuf *
+art_pixbuf_new_rgba_dnotify (art_u8 *pixels, int width, int height, int rowstride,
+ void *dfunc_data, ArtDestroyNotify dfunc)
+{
+ ArtPixBuf *pixbuf;
+
+ pixbuf = art_new (ArtPixBuf, 1);
+
+ pixbuf->format = ART_PIX_RGB;
+ pixbuf->n_channels = 4;
+ pixbuf->has_alpha = 1;
+ pixbuf->bits_per_sample = 8;
+
+ pixbuf->pixels = (art_u8 *) pixels;
+ pixbuf->width = width;
+ pixbuf->height = height;
+ pixbuf->rowstride = rowstride;
+ pixbuf->destroy_data = dfunc_data;
+ pixbuf->destroy = dfunc;
+
+ return pixbuf;
+}
+
+/**
+ * art_pixbuf_new_const_rgb: Create a new RGB #ArtPixBuf with constant pixel data.
+ * @pixels: A buffer containing the actual pixel data.
+ * @width: The width of the pixbuf.
+ * @height: The height of the pixbuf.
+ * @rowstride: The rowstride of the pixbuf.
+ *
+ * Creates a generic data structure for holding a buffer of RGB
+ * pixels. It is possible to think of an #ArtPixBuf as a
+ * virtualization over specific pixel buffer formats.
+ *
+ * No action is taken when the #ArtPixBuf is destroyed. Thus, this
+ * function is useful when the pixel data is constant or statically
+ * allocated.
+ *
+ * Return value: The newly created #ArtPixBuf.
+ **/
+ArtPixBuf *
+art_pixbuf_new_const_rgb (const art_u8 *pixels, int width, int height, int rowstride)
+{
+ return art_pixbuf_new_rgb_dnotify ((art_u8 *) pixels, width, height, rowstride, NULL, NULL);
+}
+
+/**
+ * art_pixbuf_new_const_rgba: Create a new RGBA #ArtPixBuf with constant pixel data.
+ * @pixels: A buffer containing the actual pixel data.
+ * @width: The width of the pixbuf.
+ * @height: The height of the pixbuf.
+ * @rowstride: The rowstride of the pixbuf.
+ *
+ * Creates a generic data structure for holding a buffer of RGBA
+ * pixels. It is possible to think of an #ArtPixBuf as a
+ * virtualization over specific pixel buffer formats.
+ *
+ * No action is taken when the #ArtPixBuf is destroyed. Thus, this
+ * function is suitable when the pixel data is constant or statically
+ * allocated.
+ *
+ * Return value: The newly created #ArtPixBuf.
+ **/
+ArtPixBuf *
+art_pixbuf_new_const_rgba (const art_u8 *pixels, int width, int height, int rowstride)
+{
+ return art_pixbuf_new_rgba_dnotify ((art_u8 *) pixels, width, height, rowstride, NULL, NULL);
+}
+
+static void
+art_pixel_destroy (void *func_data, void *data)
+{
+ art_free (data);
+}
+
+/**
+ * art_pixbuf_new_rgb: Create a new RGB #ArtPixBuf.
+ * @pixels: A buffer containing the actual pixel data.
+ * @width: The width of the pixbuf.
+ * @height: The height of the pixbuf.
+ * @rowstride: The rowstride of the pixbuf.
+ *
+ * Creates a generic data structure for holding a buffer of RGB
+ * pixels. It is possible to think of an #ArtPixBuf as a
+ * virtualization over specific pixel buffer formats.
+ *
+ * The @pixels buffer is freed with art_free() when the #ArtPixBuf is
+ * destroyed. Thus, this function is suitable when the pixel data is
+ * allocated with art_alloc().
+ *
+ * Return value: The newly created #ArtPixBuf.
+ **/
+ArtPixBuf *
+art_pixbuf_new_rgb (art_u8 *pixels, int width, int height, int rowstride)
+{
+ return art_pixbuf_new_rgb_dnotify (pixels, width, height, rowstride, NULL, art_pixel_destroy);
+}
+
+/**
+ * art_pixbuf_new_rgba: Create a new RGBA #ArtPixBuf.
+ * @pixels: A buffer containing the actual pixel data.
+ * @width: The width of the pixbuf.
+ * @height: The height of the pixbuf.
+ * @rowstride: The rowstride of the pixbuf.
+ *
+ * Creates a generic data structure for holding a buffer of RGBA
+ * pixels. It is possible to think of an #ArtPixBuf as a
+ * virtualization over specific pixel buffer formats.
+ *
+ * The @pixels buffer is freed with art_free() when the #ArtPixBuf is
+ * destroyed. Thus, this function is suitable when the pixel data is
+ * allocated with art_alloc().
+ *
+ * Return value: The newly created #ArtPixBuf.
+ **/
+ArtPixBuf *
+art_pixbuf_new_rgba (art_u8 *pixels, int width, int height, int rowstride)
+{
+ return art_pixbuf_new_rgba_dnotify (pixels, width, height, rowstride, NULL, art_pixel_destroy);
+}
+
+/**
+ * art_pixbuf_free: Destroy an #ArtPixBuf.
+ * @pixbuf: The #ArtPixBuf to be destroyed.
+ *
+ * Destroys the #ArtPixBuf, calling the destroy notification function
+ * (if non-NULL) so that the memory for the pixel buffer can be
+ * properly reclaimed.
+ **/
+void
+art_pixbuf_free (ArtPixBuf *pixbuf)
+{
+ ArtDestroyNotify destroy = pixbuf->destroy;
+ void *destroy_data = pixbuf->destroy_data;
+ art_u8 *pixels = pixbuf->pixels;
+
+ pixbuf->pixels = NULL;
+ pixbuf->destroy = NULL;
+ pixbuf->destroy_data = NULL;
+
+ if (destroy)
+ destroy (destroy_data, pixels);
+
+ art_free (pixbuf);
+}
+
+/**
+ * art_pixbuf_free_shallow:
+ * @pixbuf: The #ArtPixBuf to be destroyed.
+ *
+ * Destroys the #ArtPixBuf without calling the destroy notification function.
+ *
+ * This function is deprecated. Use the _dnotify variants for
+ * allocation instead.
+ **/
+void
+art_pixbuf_free_shallow (ArtPixBuf *pixbuf)
+{
+ art_free (pixbuf);
+}
+
+/**
+ * art_pixbuf_duplicate: Duplicate a pixbuf.
+ * @pixbuf: The #ArtPixBuf to duplicate.
+ *
+ * Duplicates a pixbuf, including duplicating the buffer.
+ *
+ * Return value: The duplicated pixbuf.
+ **/
+ArtPixBuf *
+art_pixbuf_duplicate (const ArtPixBuf *pixbuf)
+{
+ ArtPixBuf *result;
+ int size;
+
+ result = art_new (ArtPixBuf, 1);
+
+ result->format = pixbuf->format;
+ result->n_channels = pixbuf->n_channels;
+ result->has_alpha = pixbuf->has_alpha;
+ result->bits_per_sample = pixbuf->bits_per_sample;
+
+ size = (pixbuf->height - 1) * pixbuf->rowstride +
+ pixbuf->width * ((pixbuf->n_channels * pixbuf->bits_per_sample + 7) >> 3);
+ result->pixels = art_alloc (size);
+ memcpy (result->pixels, pixbuf->pixels, size);
+
+ result->width = pixbuf->width;
+ result->height = pixbuf->height;
+ result->rowstride = pixbuf->rowstride;
+ result->destroy_data = NULL;
+ result->destroy = art_pixel_destroy;
+
+ return result;
+}
git.asbjorn.biz / swftools.git / blobdiff