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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "m4/platform/tile/tile_read.h"
#include "m4/core/errors.h"
#include "m4/graphics/gr_buff.h"
#include "m4/mem/memman.h"
namespace M4 {
void tt_read_header(SysFile *ifp, int32 *file_x, int32 *file_y,
int32 *num_x_tiles, int32 *num_y_tiles, int32 *tile_x, int32 *tile_y, RGB8 *pal) {
int32 value;
// Initalize return parameters
*num_x_tiles = 0;
*num_y_tiles = 0;
*tile_x = 0;
*tile_y = 0;
*file_x = 0;
*file_y = 0;
// Open file
if (!ifp->exists())
error_show(FL, 'FNF!', ".TT file");
ifp->readUint32LE(); // skip chunk ID
ifp->readUint32LE(); // skip chunk size
*file_x = ifp->readSint32LE();
*file_y = ifp->readSint32LE();
*num_x_tiles = ifp->readSint32LE();
*num_y_tiles = ifp->readSint32LE();
*tile_x = ifp->readSint32LE();
*tile_y = ifp->readSint32LE();
// Write color table
for (int i = 0; i < 256; i++) {
value = ifp->readSint32LE();
pal[i].r = (value >> 16) & 0x0ff;
pal[i].g = (value >> 8) & 0x0ff;
pal[i].b = (value) & 0x0ff;
}
}
Buffer *tt_read(SysFile *ifp, int index, int32 tile_x, int32 tile_y) {
int32 tile_size;
int offset;
Buffer *out = (Buffer *)mem_alloc(sizeof(Buffer), "tile buffer");
if (!out)
error_show(FL, 'OOM!', "fail to allocate mem for buffer structure");
out->data = nullptr;
out->w = 0;
out->stride = 0;
out->h = 0;
// Check parameters
if (index < 0)
error_show(FL, 'TILI');
tile_size = tile_x * tile_y;
if (index == 0) {
// First tile data
if (!ifp->exists())
error_show(FL, 'FNF!', ".TT file");
// Read data of tiles to file
offset = index * tile_size + 256 * 4 + 32; // Get rid of color table and header stuff
ifp->seek((uint32)offset);
}
gr_buffer_init(out, "back tile", tile_x, tile_y);
if (out->data == nullptr) {
out->w = 0;
out->stride = 0;
out->h = 0;
error_show(FL, 'OOM!', "fail to allocate mem for .TT buffer");
return out;
}
out->w = out->stride = tile_x;
out->h = tile_y;
ifp->read(out->data, tile_size);
return out;
}
} // End of namespace M4
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