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author | michi_cc <michi_cc@openttd.org> | 2012-02-04 13:28:40 +0000 |
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committer | michi_cc <michi_cc@openttd.org> | 2012-02-04 13:28:40 +0000 |
commit | 5af68295b0c71edc62db53c87c89ffc38f5331bf (patch) | |
tree | c8e19da1288345949dca37b940f4b822588245b3 | |
parent | 9d72b47984f61d0c2bb724fa7bf6d54f988384c9 (diff) | |
download | openttd-5af68295b0c71edc62db53c87c89ffc38f5331bf.tar.xz |
(svn r23881) -Codechange: Move GRF sprite decoding into a separate function.
-rw-r--r-- | src/spriteloader/grf.cpp | 62 |
1 files changed, 39 insertions, 23 deletions
diff --git a/src/spriteloader/grf.cpp b/src/spriteloader/grf.cpp index a4de26244..84ed98b94 100644 --- a/src/spriteloader/grf.cpp +++ b/src/spriteloader/grf.cpp @@ -17,6 +17,7 @@ #include "table/strings.h" #include "../error.h" #include "../core/math_func.hpp" +#include "../core/alloc_type.hpp" #include "grf.hpp" extern const byte _palmap_w2d[]; @@ -41,30 +42,21 @@ static bool WarnCorruptSprite(uint8 file_slot, size_t file_pos, int line) return false; } -bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type) +/** + * Decode the image data of a single sprite. + * @param[in,out] sprite Filled with the sprite image data. + * @param file_slot File slot. + * @param file_pos File position. + * @param sprite_type Type of the sprite we're decoding. + * @param num Size of the decompressed sprite. + * @param type Type of the encoded sprite. + * @return True if the sprite was successfully loaded. + */ +bool DecodeSingleSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type, int64 num, byte type) { - /* Open the right file and go to the correct position */ - FioSeekToFile(file_slot, file_pos); - - /* Read the size and type */ - int num = FioReadWord(); - byte type = FioReadByte(); - - /* Type 0xFF indicates either a colourmap or some other non-sprite info; we do not handle them here */ - if (type == 0xFF) return false; - - sprite->height = FioReadByte(); - sprite->width = FioReadWord(); - sprite->x_offs = FioReadWord(); - sprite->y_offs = FioReadWord(); - - /* 0x02 indicates it is a compressed sprite, so we can't rely on 'num' to be valid. - * In case it is uncompressed, the size is 'num' - 8 (header-size). */ - num = (type & 0x02) ? sprite->width * sprite->height : num - 8; - - byte *dest_orig = AllocaM(byte, num); + AutoFreePtr<byte> dest_orig(MallocT<byte>(num)); byte *dest = dest_orig; - const int dest_size = num; + const int64 dest_size = num; /* Read the file, which has some kind of compression */ while (num > 0) { @@ -145,7 +137,7 @@ bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, if (dest_size > sprite->width * sprite->height) { static byte warning_level = 0; - DEBUG(sprite, warning_level, "Ignoring %i unused extra bytes from the sprite from %s at position %i", dest_size - sprite->width * sprite->height, FioGetFilename(file_slot), (int)file_pos); + DEBUG(sprite, warning_level, "Ignoring " OTTD_PRINTF64 " unused extra bytes from the sprite from %s at position %i", dest_size - sprite->width * sprite->height, FioGetFilename(file_slot), (int)file_pos); warning_level = 6; } @@ -183,3 +175,27 @@ bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, return true; } + +bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type) +{ + /* Open the right file and go to the correct position */ + FioSeekToFile(file_slot, file_pos); + + /* Read the size and type */ + int num = FioReadWord(); + byte type = FioReadByte(); + + /* Type 0xFF indicates either a colourmap or some other non-sprite info; we do not handle them here */ + if (type == 0xFF) return false; + + sprite->height = FioReadByte(); + sprite->width = FioReadWord(); + sprite->x_offs = FioReadWord(); + sprite->y_offs = FioReadWord(); + + /* 0x02 indicates it is a compressed sprite, so we can't rely on 'num' to be valid. + * In case it is uncompressed, the size is 'num' - 8 (header-size). */ + num = (type & 0x02) ? sprite->width * sprite->height : num - 8; + + return DecodeSingleSprite(sprite, file_slot, file_pos, sprite_type, num, type); +} |