mirror of https://github.com/GNOME/gimp.git
567 lines
12 KiB
C
567 lines
12 KiB
C
/* The GIMP -- an image manipulation program
|
|
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include "appenv.h"
|
|
#include "pixel_region.h"
|
|
|
|
#include "tile_manager_pvt.h"
|
|
#include "tile_pvt.h" /* ick. */
|
|
|
|
typedef struct _PixelRegionHolder PixelRegionHolder;
|
|
|
|
struct _PixelRegionHolder
|
|
{
|
|
PixelRegion *PR;
|
|
unsigned char *original_data;
|
|
int startx, starty;
|
|
int count;
|
|
};
|
|
|
|
|
|
typedef struct _PixelRegionIterator PixelRegionIterator;
|
|
|
|
struct _PixelRegionIterator
|
|
{
|
|
GSList *pixel_regions;
|
|
int region_width;
|
|
int region_height;
|
|
int portion_width;
|
|
int portion_height;
|
|
int process_count;
|
|
};
|
|
|
|
/*********************/
|
|
/* Local Variables */
|
|
|
|
|
|
|
|
/*********************/
|
|
/* Local Functions */
|
|
|
|
static int get_portion_width (PixelRegionIterator *);
|
|
static int get_portion_height (PixelRegionIterator *);
|
|
static void * pixel_regions_configure (PixelRegionIterator *);
|
|
static void pixel_region_configure (PixelRegionHolder *, PixelRegionIterator *);
|
|
|
|
|
|
/**************************/
|
|
/* Function definitions */
|
|
|
|
void
|
|
pixel_region_init (PR, tiles, x, y, w, h, dirty)
|
|
PixelRegion *PR;
|
|
TileManager *tiles;
|
|
int x, y;
|
|
int w, h;
|
|
int dirty;
|
|
{
|
|
PR->tiles = tiles;
|
|
PR->data = NULL;
|
|
PR->bytes = tiles->levels[0].bpp;
|
|
PR->rowstride = PR->bytes * TILE_WIDTH;
|
|
PR->x = x;
|
|
PR->y = y;
|
|
PR->w = w;
|
|
PR->h = h;
|
|
PR->dirty = dirty;
|
|
}
|
|
|
|
|
|
void
|
|
pixel_region_resize (PR, x, y, w, h)
|
|
PixelRegion *PR;
|
|
int x, y;
|
|
int w, h;
|
|
{
|
|
/* If the data is non-null, data is contiguous--need to advance */
|
|
if (PR->data != NULL)
|
|
{
|
|
PR->data += (y - PR->y) * PR->rowstride + (x - PR->x) * PR->bytes;
|
|
}
|
|
|
|
/* update sizes for both contiguous and tiled regions */
|
|
PR->x = x;
|
|
PR->y = y;
|
|
PR->w = w;
|
|
PR->h = h;
|
|
}
|
|
|
|
|
|
void
|
|
pixel_region_get_row (PR, x, y, w, data, subsample)
|
|
PixelRegion *PR;
|
|
int x, y;
|
|
int w;
|
|
unsigned char *data;
|
|
int subsample;
|
|
{
|
|
Tile *tile;
|
|
unsigned char *tile_data;
|
|
int inc;
|
|
int end;
|
|
int boundary;
|
|
int b;
|
|
|
|
end = x + w;
|
|
|
|
while (x < end)
|
|
{
|
|
tile = tile_manager_get_tile (PR->tiles, x, y, 0, TRUE, FALSE);
|
|
tile_data = tile->data + tile->bpp * (tile->ewidth * (y % TILE_HEIGHT) + (x % TILE_WIDTH));
|
|
boundary = x + (tile->ewidth - (x % TILE_WIDTH));
|
|
inc = subsample * tile->bpp;
|
|
|
|
for ( ; x < end && x < boundary; x += subsample)
|
|
{
|
|
for (b = 0; b < tile->bpp; b++)
|
|
*data++ = tile_data[b];
|
|
tile_data += inc;
|
|
}
|
|
|
|
tile_release (tile, FALSE);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
pixel_region_set_row (PR, x, y, w, data)
|
|
PixelRegion *PR;
|
|
int x, y;
|
|
int w;
|
|
unsigned char *data;
|
|
{
|
|
Tile *tile;
|
|
unsigned char *tile_data;
|
|
int end;
|
|
int boundary;
|
|
int b;
|
|
|
|
end = x + w;
|
|
|
|
while (x < end)
|
|
{
|
|
tile = tile_manager_get_tile (PR->tiles, x, y, 0, TRUE, TRUE);
|
|
tile_data = tile->data + tile->bpp * (tile->ewidth * (y % TILE_HEIGHT) + (x % TILE_WIDTH));
|
|
boundary = x + (tile->ewidth - (x % TILE_WIDTH));
|
|
|
|
for ( ; x < end && x < boundary; x++)
|
|
{
|
|
for (b = 0; b < tile->bpp; b++)
|
|
*tile_data++ = *data++;
|
|
}
|
|
|
|
tile_release (tile, TRUE);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
pixel_region_get_col (PR, x, y, h, data, subsample)
|
|
PixelRegion *PR;
|
|
int x, y;
|
|
int h;
|
|
unsigned char *data;
|
|
int subsample;
|
|
{
|
|
Tile *tile;
|
|
unsigned char *tile_data;
|
|
int inc;
|
|
int end;
|
|
int boundary;
|
|
int b;
|
|
|
|
end = y + h;
|
|
|
|
while (y < end)
|
|
{
|
|
tile = tile_manager_get_tile (PR->tiles, x, y, 0, TRUE, FALSE);
|
|
tile_data = tile->data + tile->bpp * (tile->ewidth * (y % TILE_HEIGHT) + (x % TILE_WIDTH));
|
|
boundary = y + (tile->eheight - (y % TILE_HEIGHT));
|
|
inc = subsample * tile->bpp * tile->ewidth;
|
|
|
|
for ( ; y < end && y < boundary; y += subsample)
|
|
{
|
|
for (b = 0; b < tile->bpp; b++)
|
|
*data++ = tile_data[b];
|
|
tile_data += inc;
|
|
}
|
|
|
|
tile_release (tile, FALSE);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
pixel_region_set_col (PR, x, y, h, data)
|
|
PixelRegion *PR;
|
|
int x, y;
|
|
int h;
|
|
unsigned char *data;
|
|
{
|
|
Tile *tile;
|
|
unsigned char *tile_data;
|
|
int inc;
|
|
int end;
|
|
int boundary;
|
|
int b;
|
|
|
|
end = y + h;
|
|
|
|
while (y < end)
|
|
{
|
|
tile = tile_manager_get_tile (PR->tiles, x, y, 0, TRUE, TRUE);
|
|
tile_data = tile->data + tile->bpp * (tile->ewidth * (y % TILE_HEIGHT) + (x % TILE_WIDTH));
|
|
boundary = y + (tile->eheight - (y % TILE_HEIGHT));
|
|
inc = tile->bpp * tile->ewidth;
|
|
|
|
for ( ; y < end && y < boundary; y++)
|
|
{
|
|
for (b = 0; b < tile->bpp; b++)
|
|
tile_data[b] = *data++;
|
|
tile_data += inc;
|
|
}
|
|
|
|
tile_release (tile, TRUE);
|
|
}
|
|
}
|
|
|
|
|
|
void *
|
|
pixel_regions_register (int num_regions, ...)
|
|
{
|
|
PixelRegion *PR;
|
|
PixelRegionHolder *PRH;
|
|
PixelRegionIterator *PRI;
|
|
int found;
|
|
va_list ap;
|
|
|
|
PRI = (PixelRegionIterator *) g_malloc (sizeof (PixelRegionIterator));
|
|
PRI->pixel_regions = NULL;
|
|
PRI->process_count = 0;
|
|
|
|
if (num_regions < 1)
|
|
return FALSE;
|
|
|
|
va_start (ap, num_regions);
|
|
|
|
found = FALSE;
|
|
while (num_regions --)
|
|
{
|
|
PR = va_arg (ap, PixelRegion *);
|
|
PRH = (PixelRegionHolder *) g_malloc (sizeof (PixelRegionHolder));
|
|
PRH->PR = PR;
|
|
|
|
if (PR != NULL)
|
|
{
|
|
/* If there is a defined value for data, make sure tiles is NULL */
|
|
if (PR->data)
|
|
PR->tiles = NULL;
|
|
PRH->original_data = PR->data;
|
|
PRH->startx = PR->x;
|
|
PRH->starty = PR->y;
|
|
PRH->PR->process_count = 0;
|
|
|
|
if (!found)
|
|
{
|
|
found = TRUE;
|
|
PRI->region_width = PR->w;
|
|
PRI->region_height = PR->h;
|
|
}
|
|
}
|
|
|
|
/* Add the pixel region holder to the list */
|
|
PRI->pixel_regions = g_slist_prepend (PRI->pixel_regions, PRH);
|
|
}
|
|
|
|
va_end (ap);
|
|
|
|
return pixel_regions_configure (PRI);
|
|
}
|
|
|
|
|
|
void *
|
|
pixel_regions_process (PRI_ptr)
|
|
void *PRI_ptr;
|
|
{
|
|
GSList *list;
|
|
PixelRegionHolder *PRH;
|
|
PixelRegionIterator *PRI;
|
|
|
|
PRI = (PixelRegionIterator *) PRI_ptr;
|
|
PRI->process_count++;
|
|
|
|
/* Unref all referenced tiles and increment the offsets */
|
|
|
|
list = PRI->pixel_regions;
|
|
while (list)
|
|
{
|
|
PRH = (PixelRegionHolder *) list->data;
|
|
|
|
if ((PRH->PR != NULL) && (PRH->PR->process_count != PRI->process_count))
|
|
{
|
|
/* This eliminates the possibility of incrementing the
|
|
* same region twice
|
|
*/
|
|
PRH->PR->process_count++;
|
|
|
|
/* Unref the last referenced tile if the underlying region is a tile manager */
|
|
if (PRH->PR->tiles)
|
|
{
|
|
Tile *tile = tile_manager_get_tile (PRH->PR->tiles, PRH->PR->x, PRH->PR->y, 0, FALSE, FALSE);
|
|
tile_release (tile, PRH->PR->dirty);
|
|
}
|
|
|
|
PRH->PR->x += PRI->portion_width;
|
|
|
|
if ((PRH->PR->x - PRH->startx) >= PRI->region_width)
|
|
{
|
|
PRH->PR->x = PRH->startx;
|
|
PRH->PR->y += PRI->portion_height;
|
|
}
|
|
}
|
|
|
|
list = g_slist_next (list);
|
|
}
|
|
|
|
return pixel_regions_configure (PRI);
|
|
}
|
|
|
|
void
|
|
pixel_regions_process_stop (PRI_ptr)
|
|
void *PRI_ptr;
|
|
{
|
|
GSList *list;
|
|
PixelRegionHolder *PRH;
|
|
PixelRegionIterator *PRI;
|
|
|
|
PRI = (PixelRegionIterator *) PRI_ptr;
|
|
PRI->process_count++;
|
|
|
|
/* Unref all referenced tiles and increment the offsets */
|
|
|
|
list = PRI->pixel_regions;
|
|
while (list)
|
|
{
|
|
PRH = (PixelRegionHolder *) list->data;
|
|
|
|
if ((PRH->PR != NULL) && (PRH->PR->process_count != PRI->process_count))
|
|
{
|
|
/* This eliminates the possibility of incrementing the
|
|
* same region twice
|
|
*/
|
|
PRH->PR->process_count++;
|
|
|
|
/* Unref the last referenced tile if the underlying region is a tile manager */
|
|
if (PRH->PR->tiles)
|
|
{
|
|
Tile *tile = tile_manager_get_tile (PRH->PR->tiles, PRH->PR->x, PRH->PR->y, 0, FALSE, FALSE);
|
|
tile_release (tile, PRH->PR->dirty);
|
|
}
|
|
}
|
|
|
|
list = g_slist_next (list);
|
|
}
|
|
|
|
if (PRI->pixel_regions)
|
|
{
|
|
list = PRI->pixel_regions;
|
|
while (list)
|
|
{
|
|
g_free (list->data);
|
|
list = g_slist_next (list);
|
|
}
|
|
g_slist_free (PRI->pixel_regions);
|
|
g_free (PRI);
|
|
}
|
|
}
|
|
|
|
|
|
/*********************************/
|
|
/* Static Function Definitions */
|
|
|
|
static int
|
|
get_portion_height (PRI)
|
|
PixelRegionIterator *PRI;
|
|
{
|
|
GSList *list;
|
|
PixelRegionHolder *PRH;
|
|
int min_height = G_MAXINT;
|
|
int height;
|
|
|
|
/* Find the minimum height to the next vertical tile (in the case of a tile manager)
|
|
* or to the end of the pixel region (in the case of no tile manager)
|
|
*/
|
|
|
|
list = PRI->pixel_regions;
|
|
while (list)
|
|
{
|
|
PRH = (PixelRegionHolder *) list->data;
|
|
|
|
if (PRH->PR)
|
|
{
|
|
/* Check if we're past the point of no return */
|
|
if ((PRH->PR->y - PRH->starty) >= PRI->region_height)
|
|
return 0;
|
|
|
|
if (PRH->PR->tiles)
|
|
{
|
|
height = TILE_HEIGHT - (PRH->PR->y % TILE_HEIGHT);
|
|
height = BOUNDS (height, 0, (PRI->region_height - (PRH->PR->y - PRH->starty)));
|
|
}
|
|
else
|
|
height = (PRI->region_height - (PRH->PR->y - PRH->starty));
|
|
|
|
if (height < min_height)
|
|
min_height = height;
|
|
}
|
|
|
|
list = g_slist_next (list);
|
|
}
|
|
|
|
return min_height;
|
|
}
|
|
|
|
|
|
static int
|
|
get_portion_width (PRI)
|
|
PixelRegionIterator *PRI;
|
|
{
|
|
GSList *list;
|
|
PixelRegionHolder *PRH;
|
|
int min_width = G_MAXINT;
|
|
int width;
|
|
|
|
/* Find the minimum width to the next vertical tile (in the case of a tile manager)
|
|
* or to the end of the pixel region (in the case of no tile manager)
|
|
*/
|
|
|
|
list = PRI->pixel_regions;
|
|
while (list)
|
|
{
|
|
PRH = (PixelRegionHolder *) list->data;
|
|
|
|
if (PRH->PR)
|
|
{
|
|
/* Check if we're past the point of no return */
|
|
if ((PRH->PR->x - PRH->startx) >= PRI->region_width)
|
|
return 0;
|
|
|
|
if (PRH->PR->tiles)
|
|
{
|
|
width = TILE_WIDTH - (PRH->PR->x % TILE_WIDTH);
|
|
width = BOUNDS (width, 0, (PRI->region_width - (PRH->PR->x - PRH->startx)));
|
|
}
|
|
else
|
|
width = (PRI->region_width - (PRH->PR->x - PRH->startx));
|
|
|
|
if (width < min_width)
|
|
min_width = width;
|
|
}
|
|
|
|
list = g_slist_next (list);
|
|
}
|
|
|
|
return min_width;
|
|
}
|
|
|
|
|
|
static void *
|
|
pixel_regions_configure (PRI)
|
|
PixelRegionIterator *PRI;
|
|
{
|
|
PixelRegionHolder *PRH;
|
|
GSList *list;
|
|
|
|
/* Determine the portion width and height */
|
|
PRI->portion_width = get_portion_width (PRI);
|
|
PRI->portion_height = get_portion_height (PRI);
|
|
|
|
if (PRI->portion_width == 0 || PRI->portion_height == 0)
|
|
{
|
|
/* free the pixel regions list */
|
|
if (PRI->pixel_regions)
|
|
{
|
|
list = PRI->pixel_regions;
|
|
while (list)
|
|
{
|
|
g_free (list->data);
|
|
list = g_slist_next (list);
|
|
}
|
|
g_slist_free (PRI->pixel_regions);
|
|
g_free (PRI);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
PRI->process_count++;
|
|
|
|
list = PRI->pixel_regions;
|
|
while (list)
|
|
{
|
|
PRH = (PixelRegionHolder *) list->data;
|
|
|
|
if ((PRH->PR != NULL) && (PRH->PR->process_count != PRI->process_count))
|
|
{
|
|
PRH->PR->process_count++;
|
|
pixel_region_configure (PRH, PRI);
|
|
}
|
|
|
|
list = g_slist_next (list);
|
|
}
|
|
|
|
return PRI;
|
|
}
|
|
|
|
|
|
static void
|
|
pixel_region_configure (PRH, PRI)
|
|
PixelRegionHolder *PRH;
|
|
PixelRegionIterator *PRI;
|
|
{
|
|
/* Configure the rowstride and data pointer for the pixel region
|
|
* based on the current offsets into the region and whether the
|
|
* region is represented by a tile manager or not
|
|
*/
|
|
if (PRH->PR->tiles)
|
|
{
|
|
Tile *tile;
|
|
int offx, offy;
|
|
|
|
tile = tile_manager_get_tile (PRH->PR->tiles, PRH->PR->x, PRH->PR->y, 0, TRUE, PRH->PR->dirty);
|
|
|
|
offx = PRH->PR->x % TILE_WIDTH;
|
|
offy = PRH->PR->y % TILE_HEIGHT;
|
|
|
|
PRH->PR->rowstride = tile->ewidth * PRH->PR->bytes;
|
|
PRH->PR->data = tile->data + offy * PRH->PR->rowstride + offx * PRH->PR->bytes;
|
|
}
|
|
else
|
|
{
|
|
PRH->PR->data = PRH->original_data +
|
|
(PRH->PR->y - PRH->starty) * PRH->PR->rowstride +
|
|
(PRH->PR->x - PRH->startx) * PRH->PR->bytes;
|
|
}
|
|
|
|
PRH->PR->w = PRI->portion_width;
|
|
PRH->PR->h = PRI->portion_height;
|
|
}
|