forked from AuroraMiddleware/gtk
Document BMP saving support.
2005-02-23 Matthias Clasen <mclasen@redhat.com> * gdk-pixbuf-io.c: Document BMP saving support. * io-bmp.c: Support saving as BMP. (168173, Ivan Wong)
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Matthias Clasen
Matthias Clasen
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534d584ba6
@ -1,5 +1,9 @@
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2005-02-23 Matthias Clasen <mclasen@redhat.com>
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* gdk-pixbuf-io.c: Document BMP saving support.
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* io-bmp.c: Support saving as BMP. (168173, Ivan Wong)
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* io-ico.c: Fix a typo. (#168173, Ivan Wong)
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2005-02-15 Matthias Clasen <mclasen@redhat.com>
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@ -1528,8 +1528,8 @@ gdk_pixbuf_real_save_to_callback (GdkPixbuf *pixbuf,
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* @error: return location for error, or %NULL
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* @Varargs: list of key-value save options
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*
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* Saves pixbuf to a file in format @type. By default, "jpeg", "png" and
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* "ico" are possible file formats to save in, but more formats may be
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* Saves pixbuf to a file in format @type. By default, "jpeg", "png", "ico"
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* and "bmp" are possible file formats to save in, but more formats may be
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* installed. The list of all writable formats can be determined in the
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* following way:
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*
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@ -1608,7 +1608,7 @@ gdk_pixbuf_save (GdkPixbuf *pixbuf,
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* @option_values: values for named options
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* @error: return location for error, or %NULL
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*
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* Saves pixbuf to a file in @type, which is currently "jpeg", "png" or "ico".
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* Saves pixbuf to a file in @type, which is currently "jpeg", "png", "ico" or "bmp".
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* If @error is set, %FALSE will be returned.
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* See gdk_pixbuf_save () for more details.
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*
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@ -1738,7 +1738,7 @@ gdk_pixbuf_save_to_callback (GdkPixbuf *pixbuf,
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* @error: return location for error, or %NULL
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*
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* Saves pixbuf to a callback in format @type, which is currently "jpeg",
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* "png" or "ico". If @error is set, %FALSE will be returned. See
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* "png", "ico" or "bmp". If @error is set, %FALSE will be returned. See
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* gdk_pixbuf_save_to_callback () for more details.
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*
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* Return value: whether an error was set
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@ -1784,7 +1784,7 @@ gdk_pixbuf_save_to_callbackv (GdkPixbuf *pixbuf,
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* @Varargs: list of key-value save options
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*
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* Saves pixbuf to a new buffer in format @type, which is currently "jpeg",
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* "png" or "ico". This is a convenience function that uses
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* "png", "ico" or "bmp". This is a convenience function that uses
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* gdk_pixbuf_save_to_callback() to do the real work. Note that the buffer
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* is not nul-terminated and may contain embedded nuls.
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* If @error is set, %FALSE will be returned and @string will be set to
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@ -1872,7 +1872,7 @@ save_to_buffer_callback (const gchar *data,
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* @error: return location for error, or %NULL
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*
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* Saves pixbuf to a new buffer in format @type, which is currently "jpeg",
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* "png" or "ico". See gdk_pixbuf_save_to_buffer() for more details.
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* "png", "ico" or "bmp". See gdk_pixbuf_save_to_buffer() for more details.
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*
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* Return value: whether an error was set
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*
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@ -1123,12 +1123,129 @@ gdk_pixbuf__bmp_image_load_increment(gpointer data,
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return TRUE;
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}
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/* for our convenience when filling file header */
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#define put16u(buf,data) { *(guint16*)(buf) = GUINT16_TO_LE (data); buf += 2; }
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#define put32u(buf,data) { *(guint32*)(buf) = GUINT32_TO_LE (data); buf += 4; }
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#define put16(buf,data) { *(gint16*)(buf) = GINT16_TO_LE (data); buf += 2; }
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#define put32(buf,data) { *(gint32*)(buf) = GINT32_TO_LE (data); buf += 4; }
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static gboolean
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gdk_pixbuf__bmp_image_save_to_callback (GdkPixbufSaveFunc save_func,
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gpointer user_data,
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GdkPixbuf *pixbuf,
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gchar **keys,
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gchar **values,
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GError **error)
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{
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guint width, height, channel, size, stride, src_stride, x, y;
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guchar BFH_BIH[40], *pixels, *buf, *src, *dst, *dst_line;
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gboolean ret;
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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channel = gdk_pixbuf_get_n_channels (pixbuf);
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pixels = gdk_pixbuf_get_pixels (pixbuf);
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src_stride = gdk_pixbuf_get_rowstride (pixbuf);
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stride = (width * 3 + 3) & ~3;
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size = stride * height;
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/* filling BFH */
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dst = BFH_BIH;
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*dst++ = 'B'; /* bfType */
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*dst++ = 'M';
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put32u (dst, size + 14 + 40); /* bfSize */
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put32u (dst, 0); /* bfReserved1 + bfReserved2 */
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put32u (dst, 14 + 40); /* bfOffBits */
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/* filling BIH */
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put32u (dst, 40); /* biSize */
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put32 (dst, width); /* biWidth */
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put32 (dst, height); /* biHeight */
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put16 (dst, 1); /* biPlanes */
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put16 (dst, 24); /* biBitCount */
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put32u (dst, BI_RGB); /* biCompression */
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put32u (dst, size); /* biSizeImage */
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put32 (dst, 0); /* biXPelsPerMeter */
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put32 (dst, 0); /* biYPelsPerMeter */
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put32u (dst, 0); /* biClrUsed */
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put32u (dst, 0); /* biClrImportant */
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if (!save_func (BFH_BIH, 14 + 40, error, user_data))
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return FALSE;
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dst_line = buf = g_try_malloc (size);
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if (!buf) {
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g_set_error (error,
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GDK_PIXBUF_ERROR,
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GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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_("Couldn't allocate memory for saving BMP file"));
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return FALSE;
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}
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/* saving as a bottom-up bmp */
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pixels += (height - 1) * src_stride;
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for (y = 0; y < height; ++y, pixels -= src_stride, dst_line += stride) {
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dst = dst_line;
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src = pixels;
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for (x = 0; x < width; ++x, dst += 3, src += channel) {
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dst[0] = src[2];
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dst[1] = src[1];
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dst[2] = src[0];
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}
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}
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ret = save_func (buf, size, error, user_data);
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g_free (buf);
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return ret;
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}
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static gboolean
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save_to_file_cb (const gchar *buf,
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gsize count,
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GError **error,
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gpointer data)
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{
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gint bytes;
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while (count > 0) {
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bytes = fwrite (buf, sizeof (gchar), count, (FILE *) data);
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if (bytes <= 0)
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break;
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count -= bytes;
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buf += bytes;
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}
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if (count) {
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g_set_error (error,
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GDK_PIXBUF_ERROR,
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GDK_PIXBUF_ERROR_FAILED,
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_("Couldn't write to BMP file"));
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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gdk_pixbuf__bmp_image_save (FILE *f,
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GdkPixbuf *pixbuf,
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gchar **keys,
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gchar **values,
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GError **error)
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{
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return gdk_pixbuf__bmp_image_save_to_callback (save_to_file_cb,
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f, pixbuf, keys,
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values, error);
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}
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void
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MODULE_ENTRY (bmp, fill_vtable) (GdkPixbufModule *module)
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{
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module->begin_load = gdk_pixbuf__bmp_image_begin_load;
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module->stop_load = gdk_pixbuf__bmp_image_stop_load;
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module->load_increment = gdk_pixbuf__bmp_image_load_increment;
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module->save = gdk_pixbuf__bmp_image_save;
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module->save_to_callback = gdk_pixbuf__bmp_image_save_to_callback;
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}
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void
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@ -1154,7 +1271,7 @@ MODULE_ENTRY (bmp, fill_info) (GdkPixbufFormat *info)
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info->description = N_("The BMP image format");
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info->mime_types = mime_types;
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info->extensions = extensions;
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info->flags = GDK_PIXBUF_FORMAT_THREADSAFE;
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info->flags = GDK_PIXBUF_FORMAT_WRITABLE | GDK_PIXBUF_FORMAT_THREADSAFE;
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info->license = "LGPL";
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}
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