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IMG_xcf.c
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/*
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SDL_image: An example image loading library for use with SDL
Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
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*/
/* This is a XCF image file loading framework */
#include <stdio.h>
#include <ctype.h>
#include <string.h>
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#include <stdlib.h>
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#include "SDL_endian.h"
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#include "SDL_image.h"
#ifdef LOAD_XCF
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#if DEBUG
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static char prop_names [][30] = {
"end",
"colormap",
"active_layer",
"active_channel",
"selection",
"floating_selection",
"opacity",
"mode",
"visible",
"linked",
"preserve_transparency",
"apply_mask",
"edit_mask",
"show_mask",
"show_masked",
"offsets",
"color",
"compression",
"guides",
"resolution",
"tattoo",
"parasites",
"unit",
"paths",
"user_unit"
};
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#endif
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typedef enum
{
PROP_END = 0,
PROP_COLORMAP = 1,
PROP_ACTIVE_LAYER = 2,
PROP_ACTIVE_CHANNEL = 3,
PROP_SELECTION = 4,
PROP_FLOATING_SELECTION = 5,
PROP_OPACITY = 6,
PROP_MODE = 7,
PROP_VISIBLE = 8,
PROP_LINKED = 9,
PROP_PRESERVE_TRANSPARENCY = 10,
PROP_APPLY_MASK = 11,
PROP_EDIT_MASK = 12,
PROP_SHOW_MASK = 13,
PROP_SHOW_MASKED = 14,
PROP_OFFSETS = 15,
PROP_COLOR = 16,
PROP_COMPRESSION = 17,
PROP_GUIDES = 18,
PROP_RESOLUTION = 19,
PROP_TATTOO = 20,
PROP_PARASITES = 21,
PROP_UNIT = 22,
PROP_PATHS = 23,
PROP_USER_UNIT = 24
} xcf_prop_type;
typedef enum {
COMPR_NONE = 0,
COMPR_RLE = 1,
COMPR_ZLIB = 2,
COMPR_FRACTAL = 3
} xcf_compr_type;
typedef enum {
IMAGE_RGB = 0,
IMAGE_GREYSCALE = 1,
IMAGE_INDEXED = 2
} xcf_image_type;
typedef struct {
Uint32 id;
Uint32 length;
union {
struct {
Uint32 num;
char * cmap;
} colormap; // 1
struct {
Uint32 drawable_offset;
} floating_selection; // 5
Sint32 opacity;
Sint32 mode;
int visible;
int linked;
int preserve_transparency;
int apply_mask;
int show_mask;
struct {
Sint32 x;
Sint32 y;
} offset;
unsigned char color [3];
Uint8 compression;
struct {
Sint32 x;
Sint32 y;
} resolution;
struct {
char * name;
Uint32 flags;
Uint32 size;
char * data;
} parasite;
} data;
} xcf_prop;
typedef struct {
char sign [14];
Uint32 width;
Uint32 height;
Sint32 image_type;
xcf_prop * properties;
Uint32 * layer_file_offsets;
Uint32 * channel_file_offsets;
xcf_compr_type compr;
Uint32 cm_num;
unsigned char * cm_map;
} xcf_header;
typedef struct {
Uint32 width;
Uint32 height;
Sint32 layer_type;
char * name;
xcf_prop * properties;
Uint32 hierarchy_file_offset;
Uint32 layer_mask_offset;
Uint32 offset_x;
Uint32 offset_y;
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int visible;
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} xcf_layer;
typedef struct {
Uint32 width;
Uint32 height;
char * name;
xcf_prop * properties;
Uint32 hierarchy_file_offset;
Uint32 color;
Uint32 opacity;
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int selection;
int visible;
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} xcf_channel;
typedef struct {
Uint32 width;
Uint32 height;
Uint32 bpp;
Uint32 * level_file_offsets;
} xcf_hierarchy;
typedef struct {
Uint32 width;
Uint32 height;
Uint32 * tile_file_offsets;
} xcf_level;
typedef unsigned char * xcf_tile;
typedef unsigned char * (* load_tile_type) (SDL_RWops *, Uint32, int, int, int);
/* See if an image is contained in a data source */
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int IMG_isXCF(SDL_RWops *src)
{
int start;
int is_XCF;
char magic[14];
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if ( !src )
return 0;
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start = SDL_RWtell(src);
is_XCF = 0;
if ( SDL_RWread(src, magic, sizeof(magic), 1) ) {
if (strncmp(magic, "gimp xcf ", 9) == 0) {
is_XCF = 1;
}
}
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SDL_RWseek(src, start, RW_SEEK_SET);
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return(is_XCF);
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}
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/* SDL-1.2 doesn't have a SDL_RWsize(). sigh... */
static Sint32 SDLCALL SDL12_RWsize(SDL_RWops *rw) {
Sint32 pos, size;
if ((pos=SDL_RWtell(rw))<0) return -1;
size = SDL_RWseek(rw, 0, RW_SEEK_END);
SDL_RWseek(rw, pos, RW_SEEK_SET);
return size;
}
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static char * read_string (SDL_RWops * src) {
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Sint32 remaining;
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Uint32 tmp;
char * data;
tmp = SDL_ReadBE32 (src);
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remaining = SDL12_RWsize(src) - SDL_RWtell(src);
if (tmp > 0 && tmp <= remaining) {
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data = (char *) malloc (sizeof (char) * tmp);
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if (data) {
SDL_RWread(src, data, tmp, 1);
data[tmp - 1] = '\0';
}
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}
else {
data = NULL;
}
return data;
}
static Uint32 Swap32 (Uint32 v) {
return
((v & 0x000000FF) << 16)
| ((v & 0x0000FF00))
| ((v & 0x00FF0000) >> 16)
| ((v & 0xFF000000));
}
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static int xcf_read_property (SDL_RWops * src, xcf_prop * prop) {
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Uint32 len;
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prop->id = SDL_ReadBE32 (src);
prop->length = SDL_ReadBE32 (src);
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#if DEBUG
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printf ("%.8X: %s(%u): %u\n", SDL_RWtell (src), prop->id < 25 ? prop_names [prop->id] : "unknown", prop->id, prop->length);
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#endif
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switch (prop->id) {
case PROP_COLORMAP:
prop->data.colormap.num = SDL_ReadBE32 (src);
prop->data.colormap.cmap = (char *) malloc (sizeof (char) * prop->data.colormap.num * 3);
SDL_RWread (src, prop->data.colormap.cmap, prop->data.colormap.num*3, 1);
break;
case PROP_OFFSETS:
prop->data.offset.x = SDL_ReadBE32 (src);
prop->data.offset.y = SDL_ReadBE32 (src);
break;
case PROP_OPACITY:
prop->data.opacity = SDL_ReadBE32 (src);
break;
case PROP_COMPRESSION:
case PROP_COLOR:
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if (prop->length > sizeof(prop->data)) {
len = sizeof(prop->data);
}
else {
len = prop->length;
}
SDL_RWread(src, &prop->data, len, 1);
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break;
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case PROP_VISIBLE:
prop->data.visible = SDL_ReadBE32 (src);
break;
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default:
// SDL_RWread (src, &prop->data, prop->length, 1);
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if (SDL_RWseek (src, prop->length, RW_SEEK_CUR) < 0)
return 0; // ERROR
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}
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return 1; // OK
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}
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static void free_xcf_header (xcf_header * h) {
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if (h->cm_num)
free (h->cm_map);
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if (h->layer_file_offsets)
free (h->layer_file_offsets);
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free (h);
}
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static xcf_header * read_xcf_header (SDL_RWops * src) {
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xcf_header * h;
xcf_prop prop;
h = (xcf_header *) malloc (sizeof (xcf_header));
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if (!h) {
return NULL;
}
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SDL_RWread (src, h->sign, 14, 1);
h->width = SDL_ReadBE32 (src);
h->height = SDL_ReadBE32 (src);
h->image_type = SDL_ReadBE32 (src);
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#ifdef DEBUG
printf ("XCF signature : %.14s\n", h->sign);
printf (" (%u,%u) type=%u\n", h->width, h->height, h->image_type);
#endif
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h->properties = NULL;
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h->layer_file_offsets = NULL;
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h->compr = COMPR_NONE;
h->cm_num = 0;
h->cm_map = NULL;
// Just read, don't save
do {
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if (!xcf_read_property (src, &prop)) {
free_xcf_header (h);
return NULL;
}
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if (prop.id == PROP_COMPRESSION)
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h->compr = (xcf_compr_type)prop.data.compression;
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else if (prop.id == PROP_COLORMAP) {
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// unused var: int i;
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Uint32 cm_num;
unsigned char *cm_map;
cm_num = prop.data.colormap.num;
cm_map = (unsigned char *) realloc(h->cm_map, sizeof (unsigned char) * 3 * cm_num);
if (cm_map) {
h->cm_num = cm_num;
h->cm_map = cm_map;
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memcpy (h->cm_map, prop.data.colormap.cmap, 3*sizeof (char)*h->cm_num);
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}
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free (prop.data.colormap.cmap);
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if (!cm_map) {
free_xcf_header(h);
return NULL;
}
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}
} while (prop.id != PROP_END);
return h;
}
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static void free_xcf_layer (xcf_layer * l) {
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free (l->name);
free (l);
}
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static xcf_layer * read_xcf_layer (SDL_RWops * src) {
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xcf_layer * l;
xcf_prop prop;
l = (xcf_layer *) malloc (sizeof (xcf_layer));
l->width = SDL_ReadBE32 (src);
l->height = SDL_ReadBE32 (src);
l->layer_type = SDL_ReadBE32 (src);
l->name = read_string (src);
do {
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if (!xcf_read_property (src, &prop)) {
free_xcf_layer (l);
return NULL;
}
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if (prop.id == PROP_OFFSETS) {
l->offset_x = prop.data.offset.x;
l->offset_y = prop.data.offset.y;
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} else if (prop.id == PROP_VISIBLE) {
l->visible = prop.data.visible ? 1 : 0;
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}
} while (prop.id != PROP_END);
l->hierarchy_file_offset = SDL_ReadBE32 (src);
l->layer_mask_offset = SDL_ReadBE32 (src);
return l;
}
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static void free_xcf_channel (xcf_channel * c) {
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free (c->name);
free (c);
}
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static xcf_channel * read_xcf_channel (SDL_RWops * src) {
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xcf_channel * l;
xcf_prop prop;
l = (xcf_channel *) malloc (sizeof (xcf_channel));
l->width = SDL_ReadBE32 (src);
l->height = SDL_ReadBE32 (src);
l->name = read_string (src);
l->selection = 0;
do {
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if (!xcf_read_property (src, &prop)) {
free_xcf_channel (l);
return NULL;
}
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switch (prop.id) {
case PROP_OPACITY:
l->opacity = prop.data.opacity << 24;
break;
case PROP_COLOR:
l->color = ((Uint32) prop.data.color[0] << 16)
| ((Uint32) prop.data.color[1] << 8)
| ((Uint32) prop.data.color[2]);
break;
case PROP_SELECTION:
l->selection = 1;
break;
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case PROP_VISIBLE:
l->visible = prop.data.visible ? 1 : 0;
break;
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default:
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;
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}
} while (prop.id != PROP_END);
l->hierarchy_file_offset = SDL_ReadBE32 (src);
return l;
}
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static void free_xcf_hierarchy (xcf_hierarchy * h) {
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free (h->level_file_offsets);
free (h);
}
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static xcf_hierarchy * read_xcf_hierarchy (SDL_RWops * src) {
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xcf_hierarchy * h;
int i;
h = (xcf_hierarchy *) malloc (sizeof (xcf_hierarchy));
h->width = SDL_ReadBE32 (src);
h->height = SDL_ReadBE32 (src);
h->bpp = SDL_ReadBE32 (src);
h->level_file_offsets = NULL;
i = 0;
do {
h->level_file_offsets = (Uint32 *) realloc (h->level_file_offsets, sizeof (Uint32) * (i+1));
h->level_file_offsets [i] = SDL_ReadBE32 (src);
} while (h->level_file_offsets [i++]);
return h;
}
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static void free_xcf_level (xcf_level * l) {
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free (l->tile_file_offsets);
free (l);
}
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static xcf_level * read_xcf_level (SDL_RWops * src) {
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xcf_level * l;
int i;
l = (xcf_level *) malloc (sizeof (xcf_level));
l->width = SDL_ReadBE32 (src);
l->height = SDL_ReadBE32 (src);
l->tile_file_offsets = NULL;
i = 0;
do {
l->tile_file_offsets = (Uint32 *) realloc (l->tile_file_offsets, sizeof (Uint32) * (i+1));
l->tile_file_offsets [i] = SDL_ReadBE32 (src);
} while (l->tile_file_offsets [i++]);
return l;
}
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static void free_xcf_tile (unsigned char * t) {
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free (t);
}
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static unsigned char * load_xcf_tile_none (SDL_RWops * src, Uint32 len, int bpp, int x, int y) {
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unsigned char * load;
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load = (unsigned char *) malloc (len); // expect this is okay
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SDL_RWread (src, load, len, 1);
return load;
}
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static unsigned char * load_xcf_tile_rle (SDL_RWops * src, Uint32 len, int bpp, int x, int y) {
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unsigned char * load, * t, * data, * d;
Uint32 reallen;
int i, size, count, j, length;
unsigned char val;
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if (len == 0) { /* probably bogus data. */
return NULL;
}
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t = load = (unsigned char *) malloc (len);
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reallen = SDL_RWread (src, t, 1, len);
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data = (unsigned char *) calloc (1, x*y*bpp);
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for (i = 0; i < bpp; i++) {
d = data + i;
size = x*y;
count = 0;
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while (size > 0) {
val = *t++;
length = val;
if (length >= 128) {
length = 255 - (length - 1);
if (length == 128) {
length = (*t << 8) + t[1];
t += 2;
}
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if (((size_t) (t - load) + length) >= len) {
break; /* bogus data */
} else if (length > size) {
break; /* bogus data */
}
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count += length;
size -= length;
while (length-- > 0) {
*d = *t++;
d += bpp;
}
}
else {
length += 1;
if (length == 128) {
length = (*t << 8) + t[1];
t += 2;
}
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if (((size_t) (t - load)) >= len) {
break; /* bogus data */
}
else if (length > size) {
break; /* bogus data */
}
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count += length;
size -= length;
val = *t++;
for (j = 0; j < length; j++) {
*d = val;
d += bpp;
}
}
}
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if (size > 0) {
break; /* just drop out, untouched data initialized to zero. */
}
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}
free (load);
return (data);
}
static Uint32 rgb2grey (Uint32 a) {
Uint8 l;
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l = (Uint8)(0.2990 * ((a & 0x00FF0000) >> 16)
+ 0.5870 * ((a & 0x0000FF00) >> 8)
+ 0.1140 * ((a & 0x000000FF)));
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return (l << 16) | (l << 8) | l;
}
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static void create_channel_surface (SDL_Surface * surf, xcf_image_type itype, Uint32 color, Uint32 opacity) {
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Uint32 c = 0;
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switch (itype) {
case IMAGE_RGB:
case IMAGE_INDEXED:
c = opacity | color;
break;
case IMAGE_GREYSCALE:
c = opacity | rgb2grey (color);
break;
}
SDL_FillRect (surf, NULL, c);
}
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static int
do_layer_surface(SDL_Surface * surface, SDL_RWops * src, xcf_header * head, xcf_layer * layer, load_tile_type load_tile)
{
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xcf_hierarchy * hierarchy;
xcf_level * level;
unsigned char * tile;
Uint8 * p8;
Uint16 * p16;
Uint32 * p;
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int i, j;
Uint32 x, y, tx, ty, ox, oy;
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Uint32 *row;
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SDL_RWseek (src, layer->hierarchy_file_offset, RW_SEEK_SET);
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hierarchy = read_xcf_hierarchy (src);
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if (hierarchy->bpp > 4) { /* unsupported. */
fprintf (stderr, "Unknown Gimp image bpp (%u)\n", (unsigned int) hierarchy->bpp);
free_xcf_hierarchy(hierarchy);
return 1;
}
if ((hierarchy->width > 20000) || (hierarchy->height > 20000)) { /* arbitrary limit to avoid integer overflow. */
fprintf (stderr, "Gimp image too large (%ux%u)\n", (unsigned int) hierarchy->width, (unsigned int) hierarchy->height);
free_xcf_hierarchy(hierarchy);
return 1;
}
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level = NULL;
for (i = 0; hierarchy->level_file_offsets [i]; i++) {
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SDL_RWseek (src, hierarchy->level_file_offsets [i], RW_SEEK_SET);
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level = read_xcf_level (src);
ty = tx = 0;
for (j = 0; level->tile_file_offsets [j]; j++) {
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SDL_RWseek (src, level->tile_file_offsets [j], RW_SEEK_SET);
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ox = tx+64 > level->width ? level->width % 64 : 64;
oy = ty+64 > level->height ? level->height % 64 : 64;
if (level->tile_file_offsets [j+1]) {
tile = load_tile
(src,
level->tile_file_offsets [j+1] - level->tile_file_offsets [j],
hierarchy->bpp,
ox, oy);
}
else {
tile = load_tile
(src,
ox*oy*6,
hierarchy->bpp,
ox, oy);
}
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if (!tile) {
if (hierarchy)
free_xcf_hierarchy(hierarchy);
if (level)
free_xcf_level(level);
return 1;
}
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p8 = tile;
p16 = (Uint16 *) p8;
p = (Uint32 *) p8;
for (y=ty; y < ty+oy; y++) {
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if ((ty >= surface->h) || ((tx+ox) > surface->w)) {
break;
}
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row = (Uint32 *)((Uint8 *)surface->pixels + y*surface->pitch + tx*4);
switch (hierarchy->bpp) {
case 4:
for (x=tx; x < tx+ox; x++)
*row++ = Swap32 (*p++);
break;
case 3:
for (x=tx; x < tx+ox; x++) {
*row = 0xFF000000;
694
695
696
*row |= ((Uint32)*p8++ << 16);
*row |= ((Uint32)*p8++ << 8);
*row |= ((Uint32)*p8++ << 0);
697
698
699
700
701
702
703
704
705
706
row++;
}
break;
case 2: // Indexed/Greyscale + Alpha
switch (head->image_type) {
case IMAGE_INDEXED:
for (x=tx; x < tx+ox; x++) {
*row = ((Uint32) (head->cm_map [*p8*3]) << 16);
*row |= ((Uint32) (head->cm_map [*p8*3+1]) << 8);
*row |= ((Uint32) (head->cm_map [*p8++*3+2]) << 0);
707
*row |= ((Uint32) *p8++ << 24);
708
709
710
711
712
713
714
715
row++;
}
break;
case IMAGE_GREYSCALE:
for (x=tx; x < tx+ox; x++) {
*row = ((Uint32) *p8 << 16);
*row |= ((Uint32) *p8 << 8);
*row |= ((Uint32) *p8++ << 0);
716
*row |= ((Uint32) *p8++ << 24);
717
718
719
720
721
row++;
}
break;
default:
fprintf (stderr, "Unknown Gimp image type (%d)\n", head->image_type);
722
723
724
725
if (hierarchy)
free_xcf_hierarchy(hierarchy);
if (level)
free_xcf_level (level);
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
return 1;
}
break;
case 1: // Indexed/Greyscale
switch (head->image_type) {
case IMAGE_INDEXED:
for (x = tx; x < tx+ox; x++) {
*row++ = 0xFF000000
| ((Uint32) (head->cm_map [*p8*3]) << 16)
| ((Uint32) (head->cm_map [*p8*3+1]) << 8)
| ((Uint32) (head->cm_map [*p8*3+2]) << 0);
p8++;
}
break;
case IMAGE_GREYSCALE:
for (x=tx; x < tx+ox; x++) {
*row++ = 0xFF000000
| (((Uint32) (*p8)) << 16)
| (((Uint32) (*p8)) << 8)
745
746
| (((Uint32) (*p8)) << 0);
++p8;
747
748
749
750
}
break;
default:
fprintf (stderr, "Unknown Gimp image type (%d)\n", head->image_type);
751
752
753
754
755
756
if (tile)
free_xcf_tile (tile);
if (level)
free_xcf_level (level);
if (hierarchy)
free_xcf_hierarchy (hierarchy);
757
758
759
760
761
return 1;
}
break;
}
}
762
763
free_xcf_tile(tile);
764
765
766
767
768
769
770
771
772
773
774
775
776
tx += 64;
if (tx >= level->width) {
tx = 0;
ty += 64;
}
if (ty >= level->height) {
break;
}
}
free_xcf_level (level);
}
free_xcf_hierarchy (hierarchy);
777
778
return 0;
779
780
}
781
782
783
784
SDL_Surface *IMG_LoadXCF_RW(SDL_RWops *src)
{
int start;
const char *error = NULL;
785
786
787
788
SDL_Surface *surface, *lays;
xcf_header * head;
xcf_layer * layer;
xcf_channel ** channel;
789
int chnls, i, offsets;
790
Sint32 offset, fp;
791
792
793
unsigned char * (* load_tile) (SDL_RWops *, Uint32, int, int, int);
794
795
796
797
if ( !src ) {
/* The error message has been set in SDL_RWFromFile */
return NULL;
}
798
start = SDL_RWtell(src);
799
800
801
802
/* Initialize the data we will clean up when we're done */
surface = NULL;
803
head = read_xcf_header (src);
804
805
806
if (!head) {
return NULL;
}
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
switch (head->compr) {
case COMPR_NONE:
load_tile = load_xcf_tile_none;
break;
case COMPR_RLE:
load_tile = load_xcf_tile_rle;
break;
default:
fprintf (stderr, "Unsupported Compression.\n");
free_xcf_header (head);
return NULL;
}
/* Create the surface of the appropriate type */
surface = SDL_AllocSurface(SDL_SWSURFACE, head->width, head->height, 32,
0x00FF0000,0x0000FF00,0x000000FF,0xFF000000);
if ( surface == NULL ) {
826
error = "Out of memory";
827
828
829
830
831
goto done;
}
offsets = 0;
832
while ((offset = SDL_ReadBE32 (src))) {
833
head->layer_file_offsets = (Uint32 *) realloc (head->layer_file_offsets, sizeof (Uint32) * (offsets+1));
834
head->layer_file_offsets [offsets] = (Uint32)offset;
835
836
837
offsets++;
}
fp = SDL_RWtell (src);
838
839
840
841
842
lays = SDL_AllocSurface(SDL_SWSURFACE, head->width, head->height, 32,
0x00FF0000,0x0000FF00,0x000000FF,0xFF000000);
if ( lays == NULL ) {
843
error = "Out of memory";
844
845
846
847
848
849
goto done;
}
// Blit layers backwards, because Gimp saves them highest first
for (i = offsets; i > 0; i--) {
SDL_Rect rs, rd;
850
SDL_RWseek (src, head->layer_file_offsets [i-1], RW_SEEK_SET);
851
852
853
854
855
856
857
858
859
860
861
862
layer = read_xcf_layer (src);
do_layer_surface (lays, src, head, layer, load_tile);
rs.x = 0;
rs.y = 0;
rs.w = layer->width;
rs.h = layer->height;
rd.x = layer->offset_x;
rd.y = layer->offset_y;
rd.w = layer->width;
rd.h = layer->height;
863
864
865
if (layer->visible)
SDL_BlitSurface (lays, &rs, surface, &rd);
free_xcf_layer (layer);
866
867
868
869
}
SDL_FreeSurface (lays);
870
SDL_RWseek (src, fp, RW_SEEK_SET);
871
872
873
874
// read channels
channel = NULL;
chnls = 0;
875
while ((offset = SDL_ReadBE32 (src))) {
876
877
channel = (xcf_channel **) realloc (channel, sizeof (xcf_channel *) * (chnls+1));
fp = SDL_RWtell (src);
878
SDL_RWseek (src, offset, RW_SEEK_SET);
879
channel [chnls++] = (read_xcf_channel (src));
880
SDL_RWseek (src, fp, RW_SEEK_SET);
881
882
883
884
885
886
887
888
889
}
if (chnls) {
SDL_Surface * chs;
chs = SDL_AllocSurface(SDL_SWSURFACE, head->width, head->height, 32,
0x00FF0000,0x0000FF00,0x000000FF,0xFF000000);
if (chs == NULL) {
890
error = "Out of memory";
891
892
893
894
goto done;
}
for (i = 0; i < chnls; i++) {
// printf ("CNLBLT %i\n", i);
895
if (!channel [i]->selection && channel [i]->visible) {
896
create_channel_surface (chs, (xcf_image_type)head->image_type, channel [i]->color, channel [i]->opacity);
897
898
899
900
SDL_BlitSurface (chs, NULL, surface, NULL);
}
free_xcf_channel (channel [i]);
}
901
free(channel);
902
903
904
905
SDL_FreeSurface (chs);
}
906
done:
907
free_xcf_header (head);
908
if ( error ) {
909
SDL_RWseek(src, start, RW_SEEK_SET);
910
911
912
913
914
if ( surface ) {
SDL_FreeSurface(surface);
surface = NULL;
}
IMG_SetError(error);
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
}
return(surface);
}
#else
/* See if an image is contained in a data source */
int IMG_isXCF(SDL_RWops *src)
{
return(0);
}
/* Load a XCF type image from an SDL datasource */
SDL_Surface *IMG_LoadXCF_RW(SDL_RWops *src)
{
return(NULL);
}
#endif /* LOAD_XCF */