mirror of
https://github.com/libretro/scummvm.git
synced 2025-01-10 03:40:25 +00:00
132 lines
3.5 KiB
C++
132 lines
3.5 KiB
C++
// Residual - Virtual machine to run LucasArts' 3D adventure games
|
|
// Copyright (C) 2003-2004 The ScummVM-Residual Team (www.scummvm.org)
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2.1 of the License, or (at your option) any later version.
|
|
//
|
|
// This library 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
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
#include "stdafx.h"
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
#include "bitmap.h"
|
|
#include "bits.h"
|
|
#include "smush.h"
|
|
#include "debug.h"
|
|
|
|
#include "driver_gl.h"
|
|
|
|
#define BITMAP_TEXTURE_SIZE 256
|
|
|
|
static void decompress_codec3(const char *compressed, char *result);
|
|
|
|
Bitmap::Bitmap(const char *filename, const char *data, int len) :
|
|
Resource(filename) {
|
|
if (len < 8 || memcmp(data, "BM F\0\0\0", 8) != 0)
|
|
error("Invalid magic loading bitmap\n");
|
|
|
|
int codec = READ_LE_UINT32(data + 8);
|
|
num_images_ = READ_LE_UINT32(data + 16);
|
|
x_ = READ_LE_UINT32(data + 20);
|
|
y_ = READ_LE_UINT32(data + 24);
|
|
format_ = READ_LE_UINT32(data + 32);
|
|
width_ = READ_LE_UINT32(data + 128);
|
|
height_ = READ_LE_UINT32(data + 132);
|
|
curr_image_ = 1;
|
|
|
|
data_ = new char*[num_images_];
|
|
int pos = 0x88;
|
|
for (int i = 0; i < num_images_; i++) {
|
|
data_[i] = new char[2 * width_ * height_];
|
|
if (codec == 0) {
|
|
memcpy(data_[i], data + pos, 2 * width_ * height_);
|
|
pos += 2 * width_ * height_ + 8;
|
|
} else if (codec == 3) {
|
|
int compressed_len = READ_LE_UINT32(data + pos);
|
|
decompress_codec3(data + pos + 4, data_[i]);
|
|
pos += compressed_len + 12;
|
|
}
|
|
|
|
#ifdef SYSTEM_BIG_ENDIAN
|
|
if (format_ == 1)
|
|
for (int j = 0; j < width_ * height_; ++j) {
|
|
((uint16 *)data_[i])[j] = SWAP_BYTES_16(((uint16 *)data_[i])[j]);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
g_driver->createBitmap(this);
|
|
}
|
|
|
|
void Bitmap::draw() const {
|
|
if (curr_image_ == 0)
|
|
return;
|
|
|
|
g_driver->drawBitmap(this);
|
|
}
|
|
|
|
Bitmap::~Bitmap() {
|
|
for (int i = 0; i < num_images_; i++)
|
|
delete[] data_[i];
|
|
delete[] data_;
|
|
g_driver->destroyBitmap(this);
|
|
}
|
|
|
|
#define GET_BIT do { bit = bitstr_value & 1; \
|
|
bitstr_len--; \
|
|
bitstr_value >>= 1; \
|
|
if (bitstr_len == 0) { \
|
|
bitstr_value = READ_LE_UINT16(compressed); \
|
|
bitstr_len = 16; \
|
|
compressed += 2; \
|
|
} \
|
|
} while (0)
|
|
|
|
static void decompress_codec3(const char *compressed, char *result) {
|
|
int bitstr_value = READ_LE_UINT16(compressed);
|
|
int bitstr_len = 16;
|
|
compressed += 2;
|
|
bool bit;
|
|
|
|
for (;;) {
|
|
GET_BIT;
|
|
if (bit == 1)
|
|
*result++ = *compressed++;
|
|
else {
|
|
GET_BIT;
|
|
int copy_len, copy_offset;
|
|
if (bit == 0) {
|
|
GET_BIT;
|
|
copy_len = 2 * bit;
|
|
GET_BIT;
|
|
copy_len += bit + 3;
|
|
copy_offset = *(uint8 *)(compressed++) - 0x100;
|
|
} else {
|
|
copy_offset = (*(uint8 *)(compressed) |
|
|
(*(uint8 *)(compressed + 1) & 0xf0) << 4) - 0x1000;
|
|
copy_len = (*(uint8 *)(compressed + 1) & 0xf) + 3;
|
|
compressed += 2;
|
|
if (copy_len == 3) {
|
|
copy_len = *(uint8 *)(compressed++) + 1;
|
|
if (copy_len == 1)
|
|
return;
|
|
}
|
|
}
|
|
while (copy_len > 0) {
|
|
*result = result[copy_offset];
|
|
result++;
|
|
copy_len--;
|
|
}
|
|
}
|
|
}
|
|
}
|