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gimp/plug-ins/common/png.c
Michael Natterer 4782168955 plug-ins/common/Makefile.am plug-ins/common/hrz.c 
2000-01-08  Michael Natterer  <mitch@gimp.org>

	* plug-ins/common/Makefile.am
	* plug-ins/common/hrz.c
	* plug-ins/common/papertile.c
	* plug-ins/common/pat.c
	* plug-ins/common/pixelize.c
	* plug-ins/common/plasma.c
	* plug-ins/common/plugindetails.c
	* plug-ins/common/png.c
	* plug-ins/common/pnm.c
	* plug-ins/common/polar.c
	* plug-ins/common/ps.c
	* plug-ins/common/psp.c
	* plug-ins/common/randomize.c
	* plug-ins/common/ripple.c
	* plug-ins/common/sample_colorize.c
	* plug-ins/common/scatter_hsv.c
	* plug-ins/common/screenshot.c
	* plug-ins/common/sel_gauss.c
	* plug-ins/common/sharpen.c
	* plug-ins/common/shift.c
	* plug-ins/common/smooth_palette.c
	* plug-ins/common/snoise.c
	* plug-ins/common/sobel.c
	* plug-ins/common/sparkle.c
	* plug-ins/common/spheredesigner.c
	* plug-ins/common/spread.c
	* plug-ins/common/sunras.c: more plugins which use the dialog
	constructor. Hacked many UIs to look like the app's dialogs.
2000-01-08 15:23:28 +00:00

1027 lines
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/*
* "$Id$"
*
* Portable Network Graphics (PNG) plug-in for The GIMP -- an image
* manipulation program
*
* Copyright 1997-1998 Michael Sweet (mike@easysw.com) and
* Daniel Skarda (0rfelyus@atrey.karlin.mff.cuni.cz).
* and 1999 Nick Lamb (njl195@zepler.org.uk)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Contents:
*
* main() - Main entry - just call gimp_main()...
* query() - Respond to a plug-in query...
* run() - Run the plug-in...
* load_image() - Load a PNG image into a new image window.
* save_image() - Save the specified image to a PNG file.
* save_close_callback() - Close the save dialog window.
* save_ok_callback() - Destroy the save dialog and save the image.
* save_compression_callback() - Update the image compression level.
* save_interlace_update() - Update the interlacing option.
* save_dialog() - Pop up the save dialog.
*
* Revision History:
*
* see ChangeLog
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <png.h> /* PNG library definitions */
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/*
* Constants...
*/
#define PLUG_IN_VERSION "1.1.10 - 8 Nov 1999"
#define SCALE_WIDTH 125
#define DEFAULT_GAMMA 2.20
/*
* Structures...
*/
typedef struct
{
gint interlaced;
gint noextras;
gint compression_level;
} PngSaveVals;
/*
* Local functions...
*/
static void query (void);
static void run (char *, int, GParam *, int *, GParam **);
static gint32 load_image (char *);
static gint save_image (char *, gint32, gint32, gint32);
static void init_gtk (void);
static gint save_dialog (void);
static void save_ok_callback (GtkWidget *, gpointer);
static void save_compression_update (GtkAdjustment *, gpointer);
static void save_interlace_update (GtkWidget *, gpointer);
/*
* Globals...
*/
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
PngSaveVals pngvals =
{
FALSE,
FALSE,
6
};
int runme = FALSE;
/*
* 'main()' - Main entry - just call gimp_main()...
*/
MAIN()
/*
* 'query()' - Respond to a plug-in query...
*/
static void
query (void)
{
static GParamDef load_args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_STRING, "filename", "The name of the file to load" },
{ PARAM_STRING, "raw_filename", "The name of the file to load" },
};
static GParamDef load_return_vals[] =
{
{ PARAM_IMAGE, "image", "Output image" },
};
static int nload_args = sizeof (load_args) / sizeof (load_args[0]);
static int nload_return_vals = sizeof (load_return_vals) / sizeof (load_return_vals[0]);
static GParamDef save_args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image" },
{ PARAM_DRAWABLE, "drawable", "Drawable to save" },
{ PARAM_STRING, "filename", "The name of the file to save the image in" },
{ PARAM_STRING, "raw_filename", "The name of the file to save the image in" },
{ PARAM_INT32, "interlace", "Use Adam7 interlacing?" },
{ PARAM_INT32, "noextras", "Skip ancillary chunks?" },
{ PARAM_INT32, "compression", "Deflate Compression factor (0--9)" }
};
static int nsave_args = sizeof (save_args) / sizeof (save_args[0]);
INIT_I18N ();
gimp_install_procedure ("file_png_load",
_("Loads files in PNG file format"),
_("This plug-in loads Portable Network Graphics (PNG) files."),
"Michael Sweet <mike@easysw.com>, Daniel Skarda <0rfelyus@atrey.karlin.mff.cuni.cz>",
"Michael Sweet <mike@easysw.com>, Daniel Skarda <0rfelyus@atrey.karlin.mff.cuni.cz>, Nick Lamb <njl195@zepler.org.uk>",
PLUG_IN_VERSION,
"<Load>/PNG", NULL, PROC_PLUG_IN, nload_args, nload_return_vals,
load_args, load_return_vals);
gimp_install_procedure ("file_png_save",
"Saves files in PNG file format",
"This plug-in saves Portable Network Graphics (PNG) files.",
"Michael Sweet <mike@easysw.com>, Daniel Skarda <0rfelyus@atrey.karlin.mff.cuni.cz>",
"Michael Sweet <mike@easysw.com>, Daniel Skarda <0rfelyus@atrey.karlin.mff.cuni.cz>, Nick Lamb <njl195@zepler.org.uk>",
PLUG_IN_VERSION,
"<Save>/PNG", "RGB*,GRAY*,INDEXED", PROC_PLUG_IN, nsave_args, 0, save_args, NULL);
gimp_register_magic_load_handler ("file_png_load", "png", "", "0,string,\211PNG\r\n\032\n");
gimp_register_save_handler ("file_png_save", "png", "");
}
/*
* 'run()' - Run the plug-in...
*/
static void
run (char *name, /* I - Name of filter program. */
int nparams, /* I - Number of parameters passed in */
GParam *param, /* I - Parameter values */
int *nreturn_vals, /* O - Number of return values */
GParam **return_vals) /* O - Return values */
{
gint32 image_ID;
gint32 drawable_ID;
gint32 orig_image_ID;
GRunModeType run_mode;
GParam *values; /* Return values */
GimpExportReturnType export = EXPORT_CANCEL;
/*
* Initialize parameter data...
*/
values = g_new (GParam, 2);
values[0].type = PARAM_STATUS;
values[0].data.d_status = STATUS_SUCCESS;
*return_vals = values;
/*
* Load or save an image...
*/
if (strcmp (name, "file_png_load") == 0)
{
INIT_I18N ();
*nreturn_vals = 2;
image_ID = load_image (param[1].data.d_string);
if (image_ID != -1)
{
values[1].type = PARAM_IMAGE;
values[1].data.d_image = image_ID;
}
else
values[0].data.d_status = STATUS_EXECUTION_ERROR;
}
else if (strcmp (name, "file_png_save") == 0)
{
INIT_I18N_UI();
run_mode = param[0].data.d_int32;
image_ID = orig_image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
*nreturn_vals = 1;
/* eventually export the image */
switch (run_mode)
{
case RUN_INTERACTIVE:
case RUN_WITH_LAST_VALS:
init_gtk ();
export = gimp_export_image (&image_ID, &drawable_ID, "PNG",
(CAN_HANDLE_RGB | CAN_HANDLE_GRAY | CAN_HANDLE_INDEXED | CAN_HANDLE_ALPHA));
if (export == EXPORT_CANCEL)
{
*nreturn_vals = 1;
values[0].data.d_status = STATUS_EXECUTION_ERROR;
return;
}
break;
default:
break;
}
switch (run_mode)
{
case RUN_INTERACTIVE :
/*
* Possibly retrieve data...
*/
gimp_get_data ("file_png_save", &pngvals);
/*
* Then acquire information with a dialog...
*/
if (!save_dialog())
return;
break;
case RUN_NONINTERACTIVE :
/*
* Make sure all the arguments are there!
*/
if (nparams != 8)
values[0].data.d_status = STATUS_CALLING_ERROR;
else
{
pngvals.interlaced = param[5].data.d_int32;
pngvals.noextras = param[6].data.d_int32;
pngvals.compression_level = param[7].data.d_int32;
if (pngvals.compression_level < 0 ||
pngvals.compression_level > 9)
values[0].data.d_status = STATUS_CALLING_ERROR;
};
break;
case RUN_WITH_LAST_VALS :
/*
* Possibly retrieve data...
*/
gimp_get_data ("file_png_save", &pngvals);
break;
default :
break;
};
if (values[0].data.d_status == STATUS_SUCCESS)
{
if (save_image (param[3].data.d_string, image_ID, drawable_ID, orig_image_ID))
gimp_set_data ("file_png_save", &pngvals, sizeof (pngvals));
else
values[0].data.d_status = STATUS_EXECUTION_ERROR;
};
if (export == EXPORT_EXPORT)
gimp_image_delete (image_ID);
}
else
values[0].data.d_status = STATUS_EXECUTION_ERROR;
}
/*
* 'load_image()' - Load a PNG image into a new image window.
*/
static gint32
load_image (char *filename) /* I - File to load */
{
int i, /* Looping var */
trns = 0, /* Transparency present */
bpp = 0, /* Bytes per pixel */
image_type = 0, /* Type of image */
layer_type = 0, /* Type of drawable/layer */
num_passes, /* Number of interlace passes in file */
pass, /* Current pass in file */
tile_height, /* Height of tile in GIMP */
begin, /* Beginning tile row */
end, /* Ending tile row */
num; /* Number of rows to load */
FILE *fp; /* File pointer */
gint32 image = -1, /* Image */
layer; /* Layer */
GDrawable *drawable; /* Drawable for layer */
GPixelRgn pixel_rgn; /* Pixel region for layer */
png_structp pp; /* PNG read pointer */
png_infop info; /* PNG info pointers */
guchar **pixels, /* Pixel rows */
*pixel; /* Pixel data */
gchar *progress; /* Title for progress display... */
guchar alpha[256], /* Index -> Alpha */
*alpha_ptr; /* Temporary pointer */
/*
* Setup the PNG data structures...
*/
#if PNG_LIBPNG_VER > 88
/*
* Use the "new" calling convention...
*/
pp = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
info = png_create_info_struct(pp);
#else
/*
* SGI (and others) supply libpng-88 and not -89c...
*/
pp = (png_structp)calloc(sizeof(png_struct), 1);
png_read_init(pp);
info = (png_infop)calloc(sizeof(png_info), 1);
#endif /* PNG_LIBPNG_VER > 88 */
if (setjmp (pp->jmpbuf))
{
g_message (_("%s\nPNG error. File corrupted?"), filename);
return image;
}
/*
* Open the file and initialize the PNG read "engine"...
*/
fp = fopen(filename, "rb");
if (fp == NULL)
{
g_message ("%s\nis not present or is unreadable", filename);
gimp_quit ();
}
png_init_io(pp, fp);
if (strrchr(filename, '/') != NULL)
progress = g_strdup_printf (_("Loading %s:"), strrchr(filename, '/') + 1);
else
progress = g_strdup_printf (_("Loading %s:"), filename);
gimp_progress_init(progress);
g_free (progress);
/*
* Get the image dimensions and create the image...
*/
png_read_info(pp, info);
/*
* This is a new version with support for tRNS (alpha + colourmaps)
* Mail me if you have trouble -- njl195@zepler.org.uk
*/
if (info->bit_depth < 8)
{
png_set_packing(pp);
if (info->color_type != PNG_COLOR_TYPE_PALETTE) {
png_set_expand(pp);
}
}
else if (info->bit_depth == 16)
png_set_strip_16(pp);
/*
* Turn on interlace handling...
*/
if (info->interlace_type)
num_passes = png_set_interlace_handling(pp);
else
num_passes = 1;
/*
* Special handling for INDEXED + tRNS (transparency palette)
*/
if (info->valid & PNG_INFO_tRNS &&
info->color_type == PNG_COLOR_TYPE_PALETTE)
{
png_get_tRNS(pp, info, &alpha_ptr, &num, NULL);
/* Copy the existing alpha values from the tRNS chunk */
for (i= 0; i < num; ++i)
alpha[i]= alpha_ptr[i];
/* And set any others to fully opaque (255) */
for (i= num; i < 256; ++i)
alpha[i]= 255;
trns= 1;
}
/*
* Update the info structures after the transformations take effect
*/
png_read_update_info(pp, info);
switch (info->color_type)
{
case PNG_COLOR_TYPE_RGB : /* RGB */
bpp = 3;
image_type = RGB;
layer_type = RGB_IMAGE;
break;
case PNG_COLOR_TYPE_RGB_ALPHA : /* RGBA */
bpp = 4;
image_type = RGB;
layer_type = RGBA_IMAGE;
break;
case PNG_COLOR_TYPE_GRAY : /* Grayscale */
bpp = 1;
image_type = GRAY;
layer_type = GRAY_IMAGE;
break;
case PNG_COLOR_TYPE_GRAY_ALPHA : /* Grayscale + alpha */
bpp = 2;
image_type = GRAY;
layer_type = GRAYA_IMAGE;
break;
case PNG_COLOR_TYPE_PALETTE : /* Indexed */
bpp = 1;
image_type = INDEXED;
layer_type = INDEXED_IMAGE;
break;
};
image = gimp_image_new(info->width, info->height, image_type);
if (image == -1)
{
g_message("Can't allocate new image\n%s", filename);
gimp_quit();
};
/*
* Find out everything we can about the image resolution
*/
#ifdef GIMP_HAVE_RESOLUTION_INFO
if (info->valid & PNG_INFO_pHYs)
{
if (info->phys_unit_type == PNG_RESOLUTION_METER)
gimp_image_set_resolution(image,
((double) info->x_pixels_per_unit) * 0.0254,
((double) info->y_pixels_per_unit) * 0.0254);
else /* set aspect ratio as resolution */
gimp_image_set_resolution(image,
((double) info->x_pixels_per_unit),
((double) info->y_pixels_per_unit));
}
#endif /* GIMP_HAVE_RESOLUTION_INFO */
gimp_image_set_filename(image, filename);
/*
* Load the colormap as necessary...
*/
if (info->color_type & PNG_COLOR_MASK_PALETTE)
gimp_image_set_cmap(image, (guchar *)info->palette, info->num_palette);
/*
* Create the "background" layer to hold the image...
*/
layer = gimp_layer_new(image, _("Background"), info->width, info->height,
layer_type, 100, NORMAL_MODE);
gimp_image_add_layer(image, layer, 0);
/*
* Get the drawable and set the pixel region for our load...
*/
drawable = gimp_drawable_get(layer);
gimp_pixel_rgn_init(&pixel_rgn, drawable, 0, 0, drawable->width,
drawable->height, TRUE, FALSE);
/*
* Temporary buffer...
*/
tile_height = gimp_tile_height ();
pixel = g_new(guchar, tile_height * info->width * bpp);
pixels = g_new(guchar *, tile_height);
for (i = 0; i < tile_height; i ++)
pixels[i] = pixel + info->width * info->channels * i;
for (pass = 0; pass < num_passes; pass ++)
{
/*
* This works if you are only reading one row at a time...
*/
for (begin = 0, end = tile_height;
begin < info->height;
begin += tile_height, end += tile_height)
{
if (end > info->height)
end = info->height;
num = end - begin;
if (pass != 0) /* to handle interlaced PiNGs */
gimp_pixel_rgn_get_rect(&pixel_rgn, pixel, 0, begin,
drawable->width, num);
png_read_rows(pp, pixels, NULL, num);
gimp_pixel_rgn_set_rect(&pixel_rgn, pixel, 0, begin,
drawable->width, num);
gimp_progress_update(((double)pass + (double)end / (double)info->height) /
(double)num_passes);
};
};
/*
* Done with the file...
*/
png_read_end(pp, info);
png_read_destroy(pp, info, NULL);
g_free(pixel);
g_free(pixels);
free(pp);
free(info);
fclose(fp);
if (trns) {
gimp_layer_add_alpha(layer);
drawable = gimp_drawable_get(layer);
gimp_pixel_rgn_init(&pixel_rgn, drawable, 0, 0, drawable->width,
drawable->height, TRUE, FALSE);
pixel = g_new(guchar, tile_height * drawable->width * 2); /* bpp == 1 */
for (begin = 0, end = tile_height;
begin < drawable->height;
begin += tile_height, end += tile_height)
{
if (end > drawable->height) end = drawable->height;
num= end - begin;
gimp_pixel_rgn_get_rect(&pixel_rgn, pixel, 0, begin,
drawable->width, num);
for (i= 0; i < tile_height * drawable->width; ++i) {
pixel[i*2+1]= alpha [ pixel[i*2] ];
}
gimp_pixel_rgn_set_rect(&pixel_rgn, pixel, 0, begin,
drawable->width, num);
}
g_free(pixel);
}
/*
* Update the display...
*/
gimp_drawable_flush(drawable);
gimp_drawable_detach(drawable);
return (image);
}
/*
* 'save_image ()' - Save the specified image to a PNG file.
*/
static gint
save_image (char *filename, /* I - File to save to */
gint32 image_ID, /* I - Image to save */
gint32 drawable_ID, /* I - Current drawable */
gint32 orig_image_ID) /* I - Original image before export */
{
int i, /* Looping var */
bpp = 0, /* Bytes per pixel */
type, /* Type of drawable/layer */
num_passes, /* Number of interlace passes in file */
pass, /* Current pass in file */
tile_height, /* Height of tile in GIMP */
begin, /* Beginning tile row */
end, /* Ending tile row */
num; /* Number of rows to load */
FILE *fp; /* File pointer */
GDrawable *drawable; /* Drawable for layer */
GPixelRgn pixel_rgn; /* Pixel region for layer */
png_structp pp; /* PNG read pointer */
png_infop info; /* PNG info pointer */
gint num_colors; /* Number of colors in colormap */
gint offx, offy; /* Drawable offsets from origin */
guchar **pixels, /* Pixel rows */
*pixel; /* Pixel data */
gchar *progress; /* Title for progress display... */
gdouble xres, yres; /* GIMP resolution (dpi) */
gdouble gamma;
guchar red, green, blue; /* For palette background */
time_t cutime; /* Time since epoch */
struct tm *gmt; /* GMT broken down */
/*
* Setup the PNG data structures...
*/
#if PNG_LIBPNG_VER > 88
/*
* Use the "new" calling convention...
*/
pp = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
info = png_create_info_struct (pp);
#else
/*
* SGI (and others) supply libpng-88 and not -89c...
*/
pp = (png_structp)calloc(sizeof(png_struct), 1);
png_write_init(pp);
info = (png_infop)calloc(sizeof(png_info), 1);
png_info_init(info);
#endif /* PNG_LIBPNG_VER > 88 */
/*
* Open the file and initialize the PNG write "engine"...
*/
fp = fopen(filename, "wb");
if (fp == NULL)
return (0);
png_init_io(pp, fp);
if (strrchr(filename, '/') != NULL)
progress = g_strdup_printf (_("Saving %s:"), strrchr(filename, '/') + 1);
else
progress = g_strdup_printf (_("Saving %s:"), filename);
gimp_progress_init(progress);
g_free (progress);
/*
* Get the drawable for the current image...
*/
drawable = gimp_drawable_get (drawable_ID);
type = gimp_drawable_type (drawable_ID);
gimp_pixel_rgn_init(&pixel_rgn, drawable, 0, 0, drawable->width,
drawable->height, FALSE, FALSE);
/*
* Set the image dimensions and save the image...
*/
png_set_compression_level (pp, pngvals.compression_level);
gamma = gimp_gamma();
info->width = drawable->width;
info->height = drawable->height;
info->bit_depth = 8;
info->gamma = 1.0 / (gamma != 1.00 ? gamma : DEFAULT_GAMMA);
info->sig_bit.red = 8;
info->sig_bit.green = 8;
info->sig_bit.blue = 8;
info->sig_bit.gray = 8;
info->sig_bit.alpha = 8;
info->interlace_type = pngvals.interlaced;
if (!pngvals.noextras) {
info->valid |= PNG_INFO_gAMA;
if (type == RGBA_IMAGE || type == GRAYA_IMAGE
|| type == INDEXEDA_IMAGE) {
gimp_palette_get_background(&red, &green, &blue);
info->valid |= PNG_INFO_bKGD;
info->background.index = 0;
info->background.red = red;
info->background.green = green;
info->background.blue = blue;
info->background.gray = (red + green + blue) / 3;
}
gimp_drawable_offsets(drawable_ID, &offx, &offy);
if (offx != 0 || offy != 0) {
info->valid |= PNG_INFO_oFFs;
info->x_offset = offx;
info->y_offset = offy;
info->offset_unit_type= PNG_OFFSET_PIXEL;
}
cutime= time(NULL); /* time right NOW */
gmt = gmtime(&cutime);
info->valid |= PNG_INFO_tIME;
info->mod_time.year = gmt->tm_year + 1900;
info->mod_time.month = gmt->tm_mon + 1;
info->mod_time.day = gmt->tm_mday;
info->mod_time.hour = gmt->tm_hour;
info->mod_time.minute = gmt->tm_min;
info->mod_time.second = gmt->tm_sec;
#ifdef GIMP_HAVE_RESOLUTION_INFO
info->valid |= PNG_INFO_pHYs;
gimp_image_get_resolution (orig_image_ID, &xres, &yres);
info->phys_unit_type = PNG_RESOLUTION_METER;
info->x_pixels_per_unit = (int) (xres * 39.37);
info->y_pixels_per_unit = (int) (yres * 39.37);
#endif /* GIMP_HAVE_RESOLUTION_INFO */
}
switch (type)
{
case RGB_IMAGE :
info->color_type = PNG_COLOR_TYPE_RGB;
bpp = 3;
break;
case RGBA_IMAGE :
info->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
bpp = 4;
break;
case GRAY_IMAGE :
info->color_type = PNG_COLOR_TYPE_GRAY;
bpp = 1;
break;
case GRAYA_IMAGE :
info->color_type = PNG_COLOR_TYPE_GRAY_ALPHA;
bpp = 2;
break;
case INDEXED_IMAGE :
bpp = 1;
info->valid |= PNG_INFO_PLTE;
info->color_type = PNG_COLOR_TYPE_PALETTE;
info->palette = (png_colorp)gimp_image_get_cmap (image_ID, &num_colors);
info->num_palette= num_colors;
break;
case INDEXEDA_IMAGE :
g_message (_("Can't save image with alpha\n"));
return 0;
break;
default:
abort ();
};
png_write_info (pp, info);
/*
* Turn on interlace handling...
*/
if (pngvals.interlaced)
num_passes = png_set_interlace_handling(pp);
else
num_passes = 1;
/*
* Allocate memory for "tile_height" rows and save the image...
*/
tile_height = gimp_tile_height();
pixel = g_new(guchar, tile_height * drawable->width * bpp);
pixels = g_new(guchar *, tile_height);
for (i = 0; i < tile_height; i ++)
pixels[i]= pixel + drawable->width * bpp * i;
for (pass = 0; pass < num_passes; pass ++)
{
/*
* This works if you are only writing one row at a time...
*/
for (begin = 0, end = tile_height;
begin < drawable->height;
begin += tile_height, end += tile_height)
{
if (end > drawable->height)
end = drawable->height;
num = end - begin;
gimp_pixel_rgn_get_rect (&pixel_rgn, pixel, 0, begin, drawable->width, num);
png_write_rows (pp, pixels, num);
gimp_progress_update (((double)pass + (double)end / (double)info->height) /
(double)num_passes);
};
};
png_write_end (pp, info);
png_write_destroy (pp);
g_free (pixel);
g_free (pixels);
/*
* Done with the file...
*/
free (pp);
free (info);
fclose (fp);
return (1);
}
/*
* 'save_ok_callback()' - Destroy the save dialog and save the image.
*/
static void
save_ok_callback (GtkWidget *widget, /* I - OK button */
gpointer data) /* I - Callback data */
{
runme = TRUE;
gtk_widget_destroy(GTK_WIDGET(data));
}
/*
* 'save_compression_callback()' - Update the image compression level.
*/
static void
save_compression_update (GtkAdjustment *adjustment, /* I - Scale adjustment */
gpointer data) /* I - Callback data */
{
pngvals.compression_level = (gint32)adjustment->value;
}
/*
* 'save_interlace_update()' - Update the interlacing option.
*/
static void
save_interlace_update (GtkWidget *widget, /* I - Interlace toggle button */
gpointer data) /* I - Callback data */
{
pngvals.interlaced = GTK_TOGGLE_BUTTON (widget)->active;
}
static void
save_noextras_update (GtkWidget *widget, /* I - Interlace toggle button */
gpointer data) /* I - Callback data */
{
pngvals.noextras = GTK_TOGGLE_BUTTON (widget)->active;
}
static void
init_gtk (void)
{
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("png");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
}
/*
* 'save_dialog()' - Pop up the save dialog.
*/
static gint
save_dialog (void)
{
GtkWidget *dlg, /* Dialog window */
*frame, /* Frame for dialog */
*table, /* Table for dialog options */
*toggle, /* Interlace toggle button */
*label, /* Label for controls */
*scale; /* Compression level scale */
GtkObject *scale_data; /* Scale data */
/*
* Open a dialog window...
*/
dlg = gimp_dialog_new (_("Save as PNG"), "png",
gimp_plugin_help_func, "filters/png.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("OK"), save_ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
_("Cancel"), gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
GTK_SIGNAL_FUNC (gtk_main_quit),
NULL);
/*
* Compression level, interlacing controls...
*/
frame = gtk_frame_new (_("Parameter Settings"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
table = gtk_table_new (2, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 2);
gtk_container_set_border_width(GTK_CONTAINER(table), 4);
gtk_container_add (GTK_CONTAINER(frame), table);
toggle = gtk_check_button_new_with_label(_("Interlacing (Adam7)"));
gtk_table_attach(GTK_TABLE(table), toggle, 0, 2, 0, 1, GTK_FILL, 0, 0, 0);
gtk_signal_connect(GTK_OBJECT(toggle), "toggled",
(GtkSignalFunc)save_interlace_update, NULL);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(toggle), pngvals.interlaced);
gtk_widget_show(toggle);
toggle = gtk_check_button_new_with_label(_("Skip ancillary chunks"));
gtk_table_attach(GTK_TABLE(table), toggle, 0, 2, 1, 2, GTK_FILL, 0, 0, 0);
gtk_signal_connect(GTK_OBJECT(toggle), "toggled",
(GtkSignalFunc)save_noextras_update, NULL);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(toggle), pngvals.noextras);
gtk_widget_show(toggle);
label = gtk_label_new (_("Compression Level:"));
gtk_misc_set_alignment(GTK_MISC (label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3,
GTK_FILL, GTK_FILL, 0, 0);
scale_data = gtk_adjustment_new(pngvals.compression_level, 1.0, 9.0, 1.0, 1.0, 0.0);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_widget_set_usize(scale, SCALE_WIDTH, 0);
gtk_table_attach(GTK_TABLE(table), scale, 1, 2, 2, 3, GTK_FILL, 0, 0, 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_scale_set_digits(GTK_SCALE (scale), 0);
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_DELAYED);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc)save_compression_update, NULL);
gtk_widget_show(label);
gtk_widget_show(scale);
gtk_widget_show(table);
gtk_widget_show(frame);
gtk_widget_show(dlg);
gtk_main();
gdk_flush();
return (runme);
}
/*
* End of "$Id$".
*/
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