mirror of
https://github.com/libretro/scummvm.git
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357 lines
8.7 KiB
C++
357 lines
8.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "common/ptr.h"
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#include "common/stream.h"
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#include "common/textconsole.h"
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#include "graphics/wincursor.h"
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namespace Graphics {
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/** A Windows cursor. */
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class WinCursor : public Cursor {
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public:
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WinCursor();
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~WinCursor();
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/** Return the cursor's width. */
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uint16 getWidth() const;
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/** Return the cursor's height. */
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uint16 getHeight() const;
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/** Return the cursor's hotspot's x coordinate. */
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uint16 getHotspotX() const;
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/** Return the cursor's hotspot's y coordinate. */
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uint16 getHotspotY() const;
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/** Return the cursor's transparent key. */
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byte getKeyColor() const;
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const byte *getSurface() const { return _surface; }
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const byte *getPalette() const { return _palette; }
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byte getPaletteStartIndex() const { return 0; }
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uint16 getPaletteCount() const { return 256; }
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/** Read the cursor's data out of a stream. */
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bool readFromStream(Common::SeekableReadStream &stream);
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private:
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byte *_surface;
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byte _palette[256 * 3];
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uint16 _width; ///< The cursor's width.
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uint16 _height; ///< The cursor's height.
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uint16 _hotspotX; ///< The cursor's hotspot's x coordinate.
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uint16 _hotspotY; ///< The cursor's hotspot's y coordinate.
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byte _keyColor; ///< The cursor's transparent key
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/** Clear the cursor. */
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void clear();
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};
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WinCursor::WinCursor() {
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_width = 0;
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_height = 0;
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_hotspotX = 0;
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_hotspotY = 0;
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_surface = 0;
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_keyColor = 0;
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memset(_palette, 0, 256 * 3);
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}
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WinCursor::~WinCursor() {
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clear();
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}
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uint16 WinCursor::getWidth() const {
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return _width;
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}
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uint16 WinCursor::getHeight() const {
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return _height;
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}
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uint16 WinCursor::getHotspotX() const {
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return _hotspotX;
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}
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uint16 WinCursor::getHotspotY() const {
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return _hotspotY;
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}
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byte WinCursor::getKeyColor() const {
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return _keyColor;
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}
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bool WinCursor::readFromStream(Common::SeekableReadStream &stream) {
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clear();
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_hotspotX = stream.readUint16LE();
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_hotspotY = stream.readUint16LE();
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// Check header size
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if (stream.readUint32LE() != 40)
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return false;
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// Check dimensions
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_width = stream.readUint32LE();
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_height = stream.readUint32LE() / 2;
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if (_width & 3) {
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// Cursors should always be a power of 2
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// Of course, it wouldn't be hard to handle but if we have no examples...
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warning("Non-divisible-by-4 width cursor found");
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return false;
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}
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// Color planes
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if (stream.readUint16LE() != 1)
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return false;
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// Only 1bpp, 4bpp and 8bpp supported
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uint16 bitsPerPixel = stream.readUint16LE();
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if (bitsPerPixel != 1 && bitsPerPixel != 4 && bitsPerPixel != 8)
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return false;
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// Compression
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if (stream.readUint32LE() != 0)
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return false;
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// Image size + X resolution + Y resolution
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stream.skip(12);
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uint32 numColors = stream.readUint32LE();
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// If the color count is 0, then it uses up the maximum amount
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if (numColors == 0)
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numColors = 1 << bitsPerPixel;
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// Reading the palette
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stream.seek(40 + 4);
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for (uint32 i = 0 ; i < numColors; i++) {
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_palette[i * 3 + 2] = stream.readByte();
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_palette[i * 3 + 1] = stream.readByte();
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_palette[i * 3 ] = stream.readByte();
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stream.readByte();
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}
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// Reading the bitmap data
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uint32 dataSize = stream.size() - stream.pos();
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byte *initialSource = new byte[dataSize];
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stream.read(initialSource, dataSize);
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// Parse the XOR map
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const byte *src = initialSource;
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_surface = new byte[_width * _height];
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byte *dest = _surface + _width * (_height - 1);
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uint32 imagePitch = _width * bitsPerPixel / 8;
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for (uint32 i = 0; i < _height; i++) {
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byte *rowDest = dest;
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if (bitsPerPixel == 1) {
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// 1bpp
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for (uint16 j = 0; j < (_width / 8); j++) {
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byte p = src[j];
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for (int k = 0; k < 8; k++, rowDest++, p <<= 1) {
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if ((p & 0x80) == 0x80)
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*rowDest = 1;
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else
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*rowDest = 0;
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}
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}
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} else if (bitsPerPixel == 4) {
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// 4bpp
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for (uint16 j = 0; j < (_width / 2); j++) {
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byte p = src[j];
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*rowDest++ = p >> 4;
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*rowDest++ = p & 0x0f;
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}
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} else {
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// 8bpp
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memcpy(rowDest, src, _width);
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}
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dest -= _width;
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src += imagePitch;
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}
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// Calculate our key color
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if (numColors < 256) {
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// If we're not using the maximum colors in a byte, we can fit it in
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_keyColor = numColors;
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} else {
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// HACK: Try to find a color that's not being used so it can become
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// our keycolor. It's quite impossible to fit 257 entries into 256...
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for (uint32 i = 0; i < 256; i++) {
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for (int j = 0; j < _width * _height; j++) {
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// TODO: Also check to see if the space is transparent
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if (_surface[j] == i)
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break;
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if (j == _width * _height - 1) {
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_keyColor = i;
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i = 256;
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break;
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}
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}
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}
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}
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// Now go through and apply the AND map to get the transparency
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uint32 andWidth = (_width + 7) / 8;
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src += andWidth * (_height - 1);
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for (uint32 y = 0; y < _height; y++) {
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for (uint32 x = 0; x < _width; x++)
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if (src[x / 8] & (1 << (7 - x % 8)))
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_surface[y * _width + x] = _keyColor;
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src -= andWidth;
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}
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delete[] initialSource;
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return true;
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}
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void WinCursor::clear() {
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delete[] _surface; _surface = 0;
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}
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WinCursorGroup::WinCursorGroup() {
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}
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WinCursorGroup::~WinCursorGroup() {
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for (uint32 i = 0; i < cursors.size(); i++)
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delete cursors[i].cursor;
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}
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WinCursorGroup *WinCursorGroup::createCursorGroup(Common::WinResources *exe, const Common::WinResourceID &id) {
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Common::ScopedPtr<Common::SeekableReadStream> stream(exe->getResource(Common::kWinGroupCursor, id));
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if (!stream || stream->size() <= 6)
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return 0;
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stream->skip(4);
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uint32 cursorCount = stream->readUint16LE();
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if ((uint32)stream->size() < (6 + cursorCount * 14))
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return 0;
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WinCursorGroup *group = new WinCursorGroup();
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group->cursors.reserve(cursorCount);
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for (uint32 i = 0; i < cursorCount; i++) {
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stream->readUint16LE(); // width
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stream->readUint16LE(); // height
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// Plane count
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if (stream->readUint16LE() != 1) {
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warning("PlaneCount is not 1.");
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}
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stream->readUint16LE(); // bits per pixel
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stream->readUint32LE(); // data size
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uint32 cursorId = stream->readUint16LE();
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Common::ScopedPtr<Common::SeekableReadStream> cursorStream(exe->getResource(Common::kWinCursor, cursorId));
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if (!cursorStream) {
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delete group;
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return 0;
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}
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WinCursor *cursor = new WinCursor();
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if (!cursor->readFromStream(*cursorStream)) {
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delete cursor;
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delete group;
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return 0;
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}
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CursorItem item;
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item.id = cursorId;
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item.cursor = cursor;
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group->cursors.push_back(item);
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}
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return group;
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}
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/**
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* The default Windows cursor
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*/
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class DefaultWinCursor : public Cursor {
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public:
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DefaultWinCursor() {}
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~DefaultWinCursor() {}
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uint16 getWidth() const { return 12; }
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uint16 getHeight() const { return 20; }
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uint16 getHotspotX() const { return 0; }
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uint16 getHotspotY() const { return 0; }
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byte getKeyColor() const { return 0; }
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const byte *getSurface() const {
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static const byte defaultCursor[] = {
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1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 2, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 2, 2, 2, 1, 0, 0, 0, 0, 0, 0, 0,
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1, 2, 2, 2, 2, 1, 0, 0, 0, 0, 0, 0,
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1, 2, 2, 2, 2, 2, 1, 0, 0, 0, 0, 0,
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1, 2, 2, 2, 2, 2, 2, 1, 0, 0, 0, 0,
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1, 2, 2, 2, 2, 2, 2, 2, 1, 0, 0, 0,
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1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 0, 0,
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1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 0,
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1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1,
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1, 2, 2, 2, 1, 2, 2, 1, 0, 0, 0, 0,
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1, 2, 2, 1, 1, 2, 2, 1, 0, 0, 0, 0,
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1, 2, 1, 0, 1, 1, 2, 2, 1, 0, 0, 0,
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1, 1, 0, 0, 0, 1, 2, 2, 1, 0, 0, 0,
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1, 0, 0, 0, 0, 0, 1, 2, 2, 1, 0, 0,
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0, 0, 0, 0, 0, 0, 1, 2, 2, 1, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 1, 2, 2, 1, 0,
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0, 0, 0, 0, 0, 0, 0, 1, 2, 2, 1, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0
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};
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return defaultCursor;
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}
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const byte *getPalette() const {
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static const byte bwPalette[] = {
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0x00, 0x00, 0x00, // Black
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0xFF, 0xFF, 0xFF // White
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};
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return bwPalette;
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}
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byte getPaletteStartIndex() const { return 1; }
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uint16 getPaletteCount() const { return 2; }
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};
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Cursor *makeDefaultWinCursor() {
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return new DefaultWinCursor();
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}
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} // End of namespace Graphics
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