mirror of https://github.com/OpenTTD/OpenTTD
90 lines
3.6 KiB
C++
90 lines
3.6 KiB
C++
/*
|
|
* This file is part of OpenTTD.
|
|
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
|
|
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** @file newgrf_act1.cpp NewGRF Action 0x01 handler. */
|
|
|
|
#include "../stdafx.h"
|
|
#include "../debug.h"
|
|
#include "../spritecache.h"
|
|
#include "newgrf_bytereader.h"
|
|
#include "newgrf_internal.h"
|
|
|
|
#include "../safeguards.h"
|
|
|
|
/* Action 0x01 */
|
|
static void NewSpriteSet(ByteReader &buf)
|
|
{
|
|
/* Basic format: <01> <feature> <num-sets> <num-ent>
|
|
* Extended format: <01> <feature> 00 <first-set> <num-sets> <num-ent>
|
|
*
|
|
* B feature feature to define sprites for
|
|
* 0, 1, 2, 3: veh-type, 4: train stations
|
|
* E first-set first sprite set to define
|
|
* B num-sets number of sprite sets (extended byte in extended format)
|
|
* E num-ent how many entries per sprite set
|
|
* For vehicles, this is the number of different
|
|
* vehicle directions in each sprite set
|
|
* Set num-dirs=8, unless your sprites are symmetric.
|
|
* In that case, use num-dirs=4.
|
|
*/
|
|
|
|
uint8_t feature = buf.ReadByte();
|
|
uint16_t num_sets = buf.ReadByte();
|
|
uint16_t first_set = 0;
|
|
|
|
if (num_sets == 0 && buf.HasData(3)) {
|
|
/* Extended Action1 format.
|
|
* Some GRFs define zero sets of zero sprites, though there is actually no use in that. Ignore them. */
|
|
first_set = buf.ReadExtendedByte();
|
|
num_sets = buf.ReadExtendedByte();
|
|
}
|
|
uint16_t num_ents = buf.ReadExtendedByte();
|
|
|
|
if (feature >= GSF_END) {
|
|
_cur_gps.skip_sprites = num_sets * num_ents;
|
|
GrfMsg(1, "NewSpriteSet: Unsupported feature 0x{:02X}, skipping {} sprites", feature, _cur_gps.skip_sprites);
|
|
return;
|
|
}
|
|
|
|
_cur_gps.AddSpriteSets(feature, _cur_gps.spriteid, first_set, num_sets, num_ents);
|
|
|
|
GrfMsg(7, "New sprite set at {} of feature 0x{:02X}, consisting of {} sets with {} views each (total {})",
|
|
_cur_gps.spriteid, feature, num_sets, num_ents, num_sets * num_ents
|
|
);
|
|
|
|
for (int i = 0; i < num_sets * num_ents; i++) {
|
|
_cur_gps.nfo_line++;
|
|
LoadNextSprite(_cur_gps.spriteid++, *_cur_gps.file, _cur_gps.nfo_line);
|
|
}
|
|
}
|
|
|
|
/* Action 0x01 (SKIP) */
|
|
static void SkipAct1(ByteReader &buf)
|
|
{
|
|
buf.ReadByte();
|
|
uint16_t num_sets = buf.ReadByte();
|
|
|
|
if (num_sets == 0 && buf.HasData(3)) {
|
|
/* Extended Action1 format.
|
|
* Some GRFs define zero sets of zero sprites, though there is actually no use in that. Ignore them. */
|
|
buf.ReadExtendedByte(); // first_set
|
|
num_sets = buf.ReadExtendedByte();
|
|
}
|
|
uint16_t num_ents = buf.ReadExtendedByte();
|
|
|
|
_cur_gps.skip_sprites = num_sets * num_ents;
|
|
|
|
GrfMsg(3, "SkipAct1: Skipping {} sprites", _cur_gps.skip_sprites);
|
|
}
|
|
|
|
template <> void GrfActionHandler<0x01>::FileScan(ByteReader &buf) { SkipAct1(buf); }
|
|
template <> void GrfActionHandler<0x01>::SafetyScan(ByteReader &buf) { SkipAct1(buf); }
|
|
template <> void GrfActionHandler<0x01>::LabelScan(ByteReader &buf) { SkipAct1(buf); }
|
|
template <> void GrfActionHandler<0x01>::Init(ByteReader &buf) { SkipAct1(buf); }
|
|
template <> void GrfActionHandler<0x01>::Reserve(ByteReader &buf) { SkipAct1(buf); }
|
|
template <> void GrfActionHandler<0x01>::Activation(ByteReader &buf) { NewSpriteSet(buf); }
|