10 #include "../stdafx.h"
11 #include "../gfx_func.h"
13 #include "../settings_type.h"
14 #include "../strings_func.h"
15 #include "table/strings.h"
17 #include "../core/math_func.hpp"
18 #include "../core/alloc_type.hpp"
19 #include "../core/bitmath_func.hpp"
22 #include "../safeguards.h"
36 static byte warning_level = 0;
37 if (warning_level == 0) {
41 Debug(sprite, warning_level,
"[{}] Loading corrupted sprite from {} at position {}", line, file.
GetSimplifiedFilename(), file_pos);
61 std::unique_ptr<byte[]> dest_orig(
new byte[num]);
62 byte *dest = dest_orig.get();
63 const int64 dest_size = num;
71 int size = (code == 0) ? 0x80 : code;
74 for (; size > 0; size--) {
80 const uint data_offset = ((code & 7) << 8) | file.
ReadByte();
81 if (dest - data_offset < dest_orig.get())
return WarnCorruptSprite(file, file_pos, __LINE__);
82 int size = -(code >> 3);
85 for (; size > 0; size--) {
86 *dest = *(dest - data_offset);
98 if (colour_fmt &
SCC_RGB) bpp += 3;
100 if (colour_fmt &
SCC_PAL) bpp++;
104 for (
int y = 0; y < sprite->
height; y++) {
105 bool last_item =
false;
108 if (container_format >= 2 && dest_size > UINT16_MAX) {
109 offset = (dest_orig[y * 4 + 3] << 24) | (dest_orig[y * 4 + 2] << 16) | (dest_orig[y * 4 + 1] << 8) | dest_orig[y * 4];
111 offset = (dest_orig[y * 2 + 1] << 8) | dest_orig[y * 2];
115 dest = dest_orig.get() + offset;
118 if (dest + (container_format >= 2 && sprite->
width > 256 ? 4 : 2) > dest_orig.get() + dest_size) {
125 if (container_format >= 2 && sprite->
width > 256) {
129 last_item = (dest[1] & 0x80) != 0;
130 length = ((dest[1] & 0x7F) << 8) | dest[0];
131 skip = (dest[3] << 8) | dest[2];
137 last_item = ((*dest) & 0x80) != 0;
138 length = (*dest++) & 0x7F;
142 data = &sprite->
data[y * sprite->
width + skip];
144 if (skip + length > sprite->
width || dest + length * bpp > dest_orig.get() + dest_size) {
148 for (
int x = 0; x < length; x++) {
154 data->
a = (colour_fmt &
SCC_ALPHA) ? *dest++ : 0xFF;
156 switch (sprite_type) {
158 case ST_FONT: data->
m = std::min<uint>(*dest, 2u);
break;
159 default: data->
m = *dest;
break;
162 if (colour_fmt ==
SCC_PAL && *dest == 0) data->
a = 0x00;
167 }
while (!last_item);
170 if (dest_size < sprite->width * sprite->
height * bpp) {
174 if (dest_size > sprite->
width * sprite->
height * bpp) {
175 static byte warning_level = 0;
176 Debug(sprite, warning_level,
"Ignoring {} unused extra bytes from the sprite from {} at position {}", dest_size - sprite->
width * sprite->
height * bpp, file.
GetSimplifiedFilename(), file_pos);
180 dest = dest_orig.get();
182 for (
int i = 0; i < sprite->
width * sprite->
height; i++) {
183 byte *pixel = &dest[i * bpp];
186 sprite->
data[i].
r = *pixel++;
187 sprite->
data[i].
g = *pixel++;
188 sprite->
data[i].
b = *pixel++;
192 switch (sprite_type) {
194 case ST_FONT: sprite->
data[i].
m = std::min<uint>(*pixel, 2u);
break;
195 default: sprite->
data[i].
m = *pixel;
break;
198 if (colour_fmt ==
SCC_PAL && *pixel == 0) sprite->
data[i].
a = 0x00;
210 if (load_32bpp)
return 0;
213 file.
SeekTo(file_pos, SEEK_SET);
220 if (type == 0xFF)
return 0;
230 if (sprite[zoom_lvl].width > INT16_MAX) {
237 num = (type & 0x02) ? sprite[zoom_lvl].width * sprite[zoom_lvl].height : num - 8;
239 if (
DecodeSingleSprite(&sprite[zoom_lvl], file, file_pos, sprite_type, num, type, zoom_lvl,
SCC_PAL, 1))
return 1 << zoom_lvl;
249 if (file_pos == SIZE_MAX)
return 0;
252 file.
SeekTo(file_pos, SEEK_SET);
256 uint8 loaded_sprites = 0;
259 size_t start_pos = file.
GetPos();
263 if (type == 0xFF)
return 0;
268 bool is_wanted_colour_depth = (colour != 0 && (load_32bpp ? colour !=
SCC_PAL : colour ==
SCC_PAL));
269 bool is_wanted_zoom_lvl;
274 is_wanted_zoom_lvl = (zoom == 0);
277 if (is_wanted_colour_depth && is_wanted_zoom_lvl) {
280 if (
HasBit(loaded_sprites, zoom_lvl)) {
292 if (sprite[zoom_lvl].width > INT16_MAX || sprite[zoom_lvl].height > INT16_MAX) {
302 if (colour &
SCC_RGB) bpp += 3;
310 uint decomp_size = (type & 0x08) ? file.
ReadDword() : sprite[zoom_lvl].
width * sprite[zoom_lvl].
height * bpp;
312 bool valid =
DecodeSingleSprite(&sprite[zoom_lvl], file, file_pos, sprite_type, decomp_size, type, zoom_lvl, colour, 2);
313 if (file.
GetPos() != start_pos + num) {
326 return loaded_sprites;
331 if (this->container_ver >= 2) {
332 return LoadSpriteV2(sprite, file, file_pos, sprite_type, load_32bpp);
334 return LoadSpriteV1(sprite, file, file_pos, sprite_type, load_32bpp);