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Add update_func callback. Call updated callback when new graphic data

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1999-11-04  Michael Fulbright  <drmike@redhat.com>

	* src/io-jpeg.c (image_begin_load): Add update_func callback.
	* src/io-jpeg.c (image_load_increment): Call updated callback when
	new graphic data decoded.
This commit is contained in:
Michael Fulbright 1999-11-04 20:02:37 +00:00 committed by Michael Fulbright
parent 5d0e9b4a2e
commit 4107506f65
2 changed files with 35 additions and 16 deletions
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12
gdk-pixbuf/ChangeLog
View File

@ -1,3 +1,9 @@
1999-11-04 Michael Fulbright <drmike@redhat.com>
* src/io-jpeg.c (image_begin_load): Add update_func callback.
* src/io-jpeg.c (image_load_increment): Call updated callback when
new graphic data decoded.
1999-11-04 Jonathan Blandford <jrb@redhat.com>
* src/gdk-pixbuf-loader.c (gdk_pixbuf_loader_update): handle the
@ -36,7 +42,7 @@
* src/Makefile.am (libpixbuf_gif_la_LIBADD): Remove dependency on
lib*gif!!!!
1999-11-03 Michael Fulbright <msf@redhat.com>
1999-11-03 Michael Fulbright <drmike@redhat.com>
* src/io-jpeg.c (image_load_increment): Further removal of
bugginess in local buffering code. Handles grayscale jpegs
@ -307,12 +313,12 @@
function.
(gdk_pixbuf_loader_write): Use size_t for count.
1999-10-27 Michael Fulbright <msf@avatar.labs.redhat.com>
1999-10-27 Michael Fulbright <drmike@redhat.com>
* src/gdk-pixbuf-loader.c (gdk_pixbuf_loader_destroy): Fixed
logic so we only try to close loader if it wasn't previously closed.
1999-10-27 Michael Fulbright <msf@redhat.com>
1999-10-27 Michael Fulbright <drmike@redhat.com>
* src/gdk-pixbuf-loader.c: Made sure image_loader struct member of
pixbuf_loader properly initialized.

37
gdk-pixbuf/io-jpeg.c
View File

@ -73,8 +73,9 @@ struct error_handler_data {
/* progressive loader context */
typedef struct {
ModulePreparedNotifyFunc notify_func;
gpointer notify_user_data;
ModuleUpdatedNotifyFunc updated_func;
ModulePreparedNotifyFunc prepared_func;
gpointer user_data;
GdkPixbuf *pixbuf;
guchar *dptr; /* current position in pixbuf */
@ -87,7 +88,8 @@ typedef struct {
} JpegProgContext;
GdkPixbuf *image_load (FILE *f);
gpointer image_begin_load (ModulePreparedNotifyFunc func, gpointer user_data);
gpointer image_begin_load (ModulePreparedNotifyFunc func,
ModuleUpdatedNotifyFunc func2, gpointer user_data);
void image_stop_load (gpointer context);
gboolean image_load_increment(gpointer context, guchar *buf, guint size);
@ -151,8 +153,10 @@ image_load (FILE *f)
int w, h, i;
guchar *pixels = NULL;
guchar *dptr;
guchar *lines[4]; /* Used to expand rows, via rec_outbuf_height, from the header file:
* "* Usually rec_outbuf_height will be 1 or 2, at most 4."
guchar *lines[4]; /* Used to expand rows, via rec_outbuf_height,
* from the header file:
* " Usually rec_outbuf_height will be 1 or 2,
* at most 4."
*/
guchar **lptr;
struct jpeg_decompress_struct cinfo;
@ -271,14 +275,17 @@ skip_input_data (j_decompress_ptr cinfo, long num_bytes)
*/
gpointer
image_begin_load (ModulePreparedNotifyFunc func, gpointer user_data)
image_begin_load (ModulePreparedNotifyFunc prepared_func,
ModuleUpdatedNotifyFunc updated_func,
gpointer user_data)
{
JpegProgContext *context;
my_source_mgr *src;
context = g_new0 (JpegProgContext, 1);
context->notify_func = func;
context->notify_user_data = user_data;
context->prepared_func = prepared_func;
context->updated_func = updated_func;
context->user_data = user_data;
context->pixbuf = NULL;
context->got_header = FALSE;
context->did_prescan = FALSE;
@ -451,10 +458,8 @@ image_load_increment (gpointer data, guchar *buf, guint size)
context->dptr = context->pixbuf->art_pixbuf->pixels;
/* Notify the client that we are ready to go */
if (context->notify_func)
(* context->notify_func) (context->pixbuf,
context->notify_user_data);
(* context->prepared_func) (context->pixbuf,
context->user_data);
} else if (!context->did_prescan) {
int rc;
@ -502,6 +507,14 @@ image_load_increment (gpointer data, guchar *buf, guint size)
context->dptr += nlines * context->pixbuf->art_pixbuf->rowstride;
/* send updated signal */
(* context->updated_func) (context->pixbuf,
context->user_data,
0,
cinfo->output_scanline-1,
cinfo->image_width,
nlines);
#undef DEBUG_JPEG_PROGRESSIVE
#ifdef DEBUG_JPEG_PROGRESSIVE