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grafX2/3rdparty/SDL_image-1.2.12.XCF_v11_64bits_offsets.patch

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--- SDL_image-1.2.12/IMG_xcf.c-orig 2018-12-03 11:36:47.264845000 +0100
+++ SDL_image-1.2.12/IMG_xcf.c 2018-12-03 11:37:34.517796000 +0100
@@ -143,9 +143,11 @@
typedef struct {
char sign [14];
+ Uint32 file_version;
Uint32 width;
Uint32 height;
Sint32 image_type;
+ Uint32 precision;
xcf_prop * properties;
Uint32 * layer_file_offsets;
@@ -241,6 +243,13 @@
return data;
}
+static Uint64 read_offset (SDL_RWops * src, const xcf_header * h) {
+ Uint64 offset; // starting with version 11, offsets are 64 bits
+ offset = (h->file_version >= 11) ? (Uint64)SDL_ReadBE32 (src) << 32 : 0;
+ offset |= SDL_ReadBE32 (src);
+ return offset;
+}
+
static Uint32 Swap32 (Uint32 v) {
return
@@ -303,10 +312,15 @@
h->width = SDL_ReadBE32 (src);
h->height = SDL_ReadBE32 (src);
h->image_type = SDL_ReadBE32 (src);
+ h->file_version = (h->sign[10] - '0') * 100 + (h->sign[11] - '0') * 10 + (h->sign[12] - '0');
#ifdef DEBUG
- printf ("XCF signature : %.14s\n", h->sign);
+ printf ("XCF signature : %.14s (version %u)\n", h->sign, h->file_version);
printf (" (%u,%u) type=%u\n", h->width, h->height, h->image_type);
#endif
+ if (h->file_version >= 4)
+ h->precision = SDL_ReadBE32 (src);
+ else
+ h->precision = 150;
h->properties = NULL;
h->compr = COMPR_NONE;
@@ -339,7 +353,7 @@
free (l);
}
-static xcf_layer * read_xcf_layer (SDL_RWops * src) {
+static xcf_layer * read_xcf_layer (SDL_RWops * src, const xcf_header * h) {
xcf_layer * l;
xcf_prop prop;
@@ -349,6 +363,9 @@
l->layer_type = SDL_ReadBE32 (src);
l->name = read_string (src);
+#ifdef DEBUG
+ printf ("layer (%d,%d) type=%d '%s'\n", l->width, l->height, l->layer_type, l->name);
+#endif
do {
if (!xcf_read_property (src, &prop)) {
@@ -363,8 +380,8 @@
}
} while (prop.id != PROP_END);
- l->hierarchy_file_offset = SDL_ReadBE32 (src);
- l->layer_mask_offset = SDL_ReadBE32 (src);
+ l->hierarchy_file_offset = read_offset (src, h);
+ l->layer_mask_offset = read_offset (src, h);
return l;
}
@@ -374,7 +391,7 @@
free (c);
}
-static xcf_channel * read_xcf_channel (SDL_RWops * src) {
+static xcf_channel * read_xcf_channel (SDL_RWops * src, const xcf_header * h) {
xcf_channel * l;
xcf_prop prop;
@@ -383,6 +400,9 @@
l->height = SDL_ReadBE32 (src);
l->name = read_string (src);
+#ifdef DEBUG
+ printf ("channel (%u,%u) '%s'\n", l->width, l->height, l->name);
+#endif
l->selection = 0;
do {
@@ -410,7 +430,7 @@
}
} while (prop.id != PROP_END);
- l->hierarchy_file_offset = SDL_ReadBE32 (src);
+ l->hierarchy_file_offset = read_offset (src, h);
return l;
}
@@ -420,7 +440,7 @@
free (h);
}
-static xcf_hierarchy * read_xcf_hierarchy (SDL_RWops * src) {
+static xcf_hierarchy * read_xcf_hierarchy (SDL_RWops * src, const xcf_header * head) {
xcf_hierarchy * h;
int i;
@@ -433,7 +453,7 @@
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);
+ h->level_file_offsets [i] = read_offset (src, head);
} while (h->level_file_offsets [i++]);
return h;
@@ -444,7 +464,7 @@
free (l);
}
-static xcf_level * read_xcf_level (SDL_RWops * src) {
+static xcf_level * read_xcf_level (SDL_RWops * src, const xcf_header * h) {
xcf_level * l;
int i;
@@ -456,7 +476,7 @@
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);
+ l->tile_file_offsets [i] = read_offset (src, h);
} while (l->tile_file_offsets [i++]);
return l;
@@ -470,7 +490,8 @@
unsigned char * load;
load = (unsigned char *) malloc (len); // expect this is okay
- SDL_RWread (src, load, len, 1);
+ if (load != NULL)
+ SDL_RWread (src, load, len, 1);
return load;
}
@@ -568,12 +589,12 @@
Uint32 *row;
SDL_RWseek (src, layer->hierarchy_file_offset, RW_SEEK_SET);
- hierarchy = read_xcf_hierarchy (src);
+ hierarchy = read_xcf_hierarchy (src, head);
level = NULL;
for (i = 0; hierarchy->level_file_offsets [i]; i++) {
SDL_RWseek (src, hierarchy->level_file_offsets [i], RW_SEEK_SET);
- level = read_xcf_level (src);
+ level = read_xcf_level (src, head);
ty = tx = 0;
for (j = 0; level->tile_file_offsets [j]; j++) {
@@ -582,6 +603,8 @@
oy = ty+64 > level->height ? level->height % 64 : 64;
if (level->tile_file_offsets [j+1]) {
+ if (level->tile_file_offsets [j+1] <= level->tile_file_offsets [j])
+ break;
tile = load_tile
(src,
level->tile_file_offsets [j+1] - level->tile_file_offsets [j],
@@ -735,7 +758,7 @@
head->layer_file_offsets = NULL;
offsets = 0;
- while ((offset = SDL_ReadBE32 (src))) {
+ while ((offset = read_offset (src, head))) {
head->layer_file_offsets = (Uint32 *) realloc (head->layer_file_offsets, sizeof (Uint32) * (offsets+1));
head->layer_file_offsets [offsets] = offset;
offsets++;
@@ -755,20 +778,22 @@
SDL_Rect rs, rd;
SDL_RWseek (src, head->layer_file_offsets [i-1], RW_SEEK_SET);
- 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;
-
- if (layer->visible)
- SDL_BlitSurface (lays, &rs, surface, &rd);
- free_xcf_layer (layer);
+ layer = read_xcf_layer (src, head);
+ if (layer != NULL) {
+ 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;
+
+ if (layer->visible)
+ SDL_BlitSurface (lays, &rs, surface, &rd);
+ free_xcf_layer (layer);
+ }
}
SDL_FreeSurface (lays);
@@ -778,11 +803,13 @@
// read channels
channel = NULL;
chnls = 0;
- while ((offset = SDL_ReadBE32 (src))) {
+ while ((offset = read_offset (src, head))) {
channel = (xcf_channel **) realloc (channel, sizeof (xcf_channel *) * (chnls+1));
fp = SDL_RWtell (src);
SDL_RWseek (src, offset, RW_SEEK_SET);
- channel [chnls++] = (read_xcf_channel (src));
+ channel [chnls] = (read_xcf_channel (src, head));
+ if (channel [chnls] != NULL)
+ chnls++;
SDL_RWseek (src, fp, RW_SEEK_SET);
}
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