grf.cpp
Go to the documentation of this file.00001
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00012 #include "../stdafx.h"
00013 #include "../gfx_func.h"
00014 #include "../fileio_func.h"
00015 #include "../debug.h"
00016 #include "../strings_func.h"
00017 #include "table/strings.h"
00018 #include "../gui.h"
00019 #include "grf.hpp"
00020
00029 static bool WarnCorruptSprite(uint8 file_slot, size_t file_pos, int line)
00030 {
00031 static byte warning_level = 0;
00032 if (warning_level == 0) {
00033 SetDParamStr(0, FioGetFilename(file_slot));
00034 ShowErrorMessage(STR_NEWGRF_ERROR_CORRUPT_SPRITE, INVALID_STRING_ID, 0, 0);
00035 }
00036 DEBUG(sprite, warning_level, "[%i] Loading corrupted sprite from %s at position %i", line, FioGetFilename(file_slot), (int)file_pos);
00037 warning_level = 6;
00038 return false;
00039 }
00040
00041 bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
00042 {
00043
00044 FioSeekToFile(file_slot, file_pos);
00045
00046
00047 int num = FioReadWord();
00048 byte type = FioReadByte();
00049
00050
00051 if (type == 0xFF) return false;
00052
00053 sprite->height = FioReadByte();
00054 sprite->width = FioReadWord();
00055 sprite->x_offs = FioReadWord();
00056 sprite->y_offs = FioReadWord();
00057
00058
00059
00060 num = (type & 0x02) ? sprite->width * sprite->height : num - 8;
00061
00062 byte *dest_orig = AllocaM(byte, num);
00063 byte *dest = dest_orig;
00064 const int dest_size = num;
00065
00066
00067 while (num > 0) {
00068 int8 code = FioReadByte();
00069
00070 if (code >= 0) {
00071
00072 int size = (code == 0) ? 0x80 : code;
00073 num -= size;
00074 if (num < 0) return WarnCorruptSprite(file_slot, file_pos, __LINE__);
00075 for (; size > 0; size--) {
00076 *dest = FioReadByte();
00077 dest++;
00078 }
00079 } else {
00080
00081 const uint data_offset = ((code & 7) << 8) | FioReadByte();
00082 if (dest - data_offset < dest_orig) return WarnCorruptSprite(file_slot, file_pos, __LINE__);
00083 int size = -(code >> 3);
00084 num -= size;
00085 if (num < 0) return WarnCorruptSprite(file_slot, file_pos, __LINE__);
00086 for (; size > 0; size--) {
00087 *dest = *(dest - data_offset);
00088 dest++;
00089 }
00090 }
00091 }
00092
00093 if (num != 0) return WarnCorruptSprite(file_slot, file_pos, __LINE__);
00094
00095 sprite->AllocateData(sprite->width * sprite->height);
00096
00097
00098 if (type & 0x08) {
00099 for (int y = 0; y < sprite->height; y++) {
00100 bool last_item = false;
00101
00102 int offset = (dest_orig[y * 2 + 1] << 8) | dest_orig[y * 2];
00103
00104
00105 dest = dest_orig + offset;
00106
00107 do {
00108 if (dest + 2 > dest_orig + dest_size) {
00109 free(sprite->data);
00110 return WarnCorruptSprite(file_slot, file_pos, __LINE__);
00111 }
00112
00113 SpriteLoader::CommonPixel *data;
00114
00115
00116
00117
00118 last_item = ((*dest) & 0x80) != 0;
00119 int length = (*dest++) & 0x7F;
00120 int skip = *dest++;
00121
00122 data = &sprite->data[y * sprite->width + skip];
00123
00124 if (skip + length > sprite->width || dest + length > dest_orig + dest_size) {
00125 free(sprite->data);
00126 return WarnCorruptSprite(file_slot, file_pos, __LINE__);
00127 }
00128
00129 for (int x = 0; x < length; x++) {
00130 switch (sprite_type) {
00131 case ST_NORMAL: data->m = _palette_remap_grf[file_slot] ? _palette_remap[*dest] : *dest; break;
00132 case ST_FONT: data->m = min(*dest, 2u); break;
00133 default: data->m = *dest; break;
00134 }
00135 dest++;
00136 data++;
00137 }
00138 } while (!last_item);
00139 }
00140 } else {
00141 if (dest_size < sprite->width * sprite->height) {
00142 free(sprite->data);
00143 return WarnCorruptSprite(file_slot, file_pos, __LINE__);
00144 }
00145
00146 if (dest_size > sprite->width * sprite->height) {
00147 static byte warning_level = 0;
00148 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);
00149 warning_level = 6;
00150 }
00151
00152 dest = dest_orig;
00153
00154 for (int i = 0; i < sprite->width * sprite->height; i++) {
00155 switch (sprite_type) {
00156 case ST_NORMAL: sprite->data[i].m = _palette_remap_grf[file_slot] ? _palette_remap[dest[i]] : dest[i]; break;
00157 case ST_FONT: sprite->data[i].m = min(dest[i], 2u); break;
00158 default: sprite->data[i].m = dest[i]; break;
00159 }
00160 }
00161 }
00162
00163
00164 for (int i = 0; i < sprite->width * sprite->height; i++)
00165 if (sprite->data[i].m != 0) sprite->data[i].a = 0xFF;
00166
00167 return true;
00168 }