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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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/textconsole.h"
#include "graphics/maccursor.h"
namespace Graphics {
MacCursor::MacCursor() {
_surface = 0;
memset(_palette, 0, 256 * 3);
_hotspotX = 0;
_hotspotY = 0;
}
MacCursor::~MacCursor() {
clear();
}
void MacCursor::clear() {
delete[] _surface; _surface = 0;
memset(_palette, 0, 256 * 3);
}
bool MacCursor::readFromStream(Common::SeekableReadStream &stream, bool forceMonochrome, byte monochromeInvertedPixelColor) {
clear();
// Older Mac CURS monochrome cursors had a set size
// All crsr cursors are larger than this
if (stream.size() == 32 * 2 + 4)
return readFromCURS(stream, monochromeInvertedPixelColor);
return readFromCRSR(stream, forceMonochrome, monochromeInvertedPixelColor);
}
bool MacCursor::readFromCURS(Common::SeekableReadStream &stream, byte monochromeInvertedPixelColor) {
// Grab B/W icon data
_surface = new byte[16 * 16];
for (int i = 0; i < 32; i++) {
byte imageByte = stream.readByte();
for (int b = 0; b < 8; b++)
_surface[i * 8 + b] = (byte)((imageByte & (0x80 >> b)) > 0 ? 0 : 1);
}
// Apply mask data
for (int i = 0; i < 32; i++) {
byte imageByte = stream.readByte();
for (int b = 0; b < 8; b++) {
if ((imageByte & (0x80 >> b)) == 0) {
// if an image bit is set outside the mask then the destination pixel
// would have been inverted on macintosh, otherwise it's transparent.
// we don't currently implement this inversion effect so instead we
// use the optional color provided by the caller for these pixels.
_surface[i * 8 + b] = _surface[i * 8 + b] ? 0xff : monochromeInvertedPixelColor;
}
}
}
_hotspotY = stream.readUint16BE();
_hotspotX = stream.readUint16BE();
// Setup a basic palette
_palette[1 * 3 + 0] = 0xff;
_palette[1 * 3 + 1] = 0xff;
_palette[1 * 3 + 2] = 0xff;
return !stream.eos();
}
bool MacCursor::readFromCRSR(Common::SeekableReadStream &stream, bool forceMonochrome, byte monochromeInvertedPixelColor) {
stream.readUint16BE(); // type
stream.readUint32BE(); // offset to pixel map
stream.readUint32BE(); // offset to pixel data
stream.readUint32BE(); // expanded cursor data
stream.readUint16BE(); // expanded data depth
stream.readUint32BE(); // reserved
// Read the B/W data first
if (!readFromCURS(stream, monochromeInvertedPixelColor))
return false;
// Use b/w cursor on backends which don't support cursor palettes
if (forceMonochrome)
return true;
stream.readUint32BE(); // reserved
stream.readUint32BE(); // cursorID
// Color version of cursor
stream.readUint32BE(); // baseAddr
// Keep only lowbyte for now
stream.readByte();
int iconRowBytes = stream.readByte();
if (!iconRowBytes)
return false;
int iconBounds[4];
iconBounds[0] = stream.readUint16BE();
iconBounds[1] = stream.readUint16BE();
iconBounds[2] = stream.readUint16BE();
iconBounds[3] = stream.readUint16BE();
stream.readUint16BE(); // pmVersion
stream.readUint16BE(); // packType
stream.readUint32BE(); // packSize
stream.readUint32BE(); // hRes
stream.readUint32BE(); // vRes
stream.readUint16BE(); // pixelType
stream.readUint16BE(); // pixelSize
stream.readUint16BE(); // cmpCount
stream.readUint16BE(); // cmpSize
stream.readUint32BE(); // planeByte
stream.readUint32BE(); // pmTable
stream.readUint32BE(); // reserved
// Pixel data for cursor
int iconDataSize = iconRowBytes * (iconBounds[3] - iconBounds[1]);
byte *iconData = new byte[iconDataSize];
if (!iconData)
error("Cannot allocate Mac color cursor iconData");
stream.read(iconData, iconDataSize);
// Color table
stream.readUint32BE(); // ctSeed
stream.readUint16BE(); // ctFlag
uint16 ctSize = stream.readUint16BE() + 1;
// Read just high byte of 16-bit color
for (int c = 0; c < ctSize; c++) {
stream.readUint16BE();
_palette[c * 3 + 0] = stream.readUint16BE() >> 8;
_palette[c * 3 + 1] = stream.readUint16BE() >> 8;
_palette[c * 3 + 2] = stream.readUint16BE() >> 8;
}
int pixelsPerByte = (iconBounds[2] - iconBounds[0]) / iconRowBytes;
int bpp = 8 / pixelsPerByte;
// build a mask to make sure the pixels are properly shifted out
int bitmask = 0;
for (int m = 0; m < bpp; m++) {
bitmask <<= 1;
bitmask |= 1;
}
// Extract pixels from bytes
for (int j = 0; j < iconDataSize; j++) {
for (int b = 0; b < pixelsPerByte; b++) {
int idx = j * pixelsPerByte + (pixelsPerByte - 1 - b);
if (_surface[idx] != 0xff) // if mask is not there
_surface[idx] = (byte)((iconData[j] >> (b * bpp)) & bitmask);
}
}
delete[] iconData;
return stream.pos() == stream.size();
}
} // End of namespace Common
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