aboutsummaryrefslogtreecommitdiff
path: root/engines/pegasus/graphics.cpp
blob: 2042b8f712e6bea2d4e1f06b4de2e2318d897428 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
/* 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 "pegasus/graphics.h"

#include "common/endian.h"
#include "common/file.h"
#include "common/textconsole.h"
#include "engines/util.h"
#include "graphics/cursorman.h"

namespace Pegasus {
	
GraphicsManager::GraphicsManager(PegasusEngine *vm) : _vm(vm) {
	initGraphics(640, 480, true, NULL);
	
	_pictDecoder = new Graphics::PictDecoder(_vm->_system->getScreenFormat());

	for (int i = 0; i < kImageCacheSize; i++)
		_cache[i].surface = 0;
}
	
GraphicsManager::~GraphicsManager() {
	delete _pictDecoder;

	for (int i = 0; i < kImageCacheSize; i++) {
		if (_cache[i].surface) {
			_cache[i].surface->free();
			delete _cache[i].surface;
		}
	}
}

Graphics::Surface *GraphicsManager::decodeImage(const Common::String &filename) {
	int imageSlot = getImageSlot(filename);

	if (_cache[imageSlot].surface)
		return _cache[imageSlot].surface;

	Common::File file;
	if (!file.open(filename))
		error("Could not open \'%s\'", filename.c_str());

	byte palette[256 * 3];
	Graphics::Surface *image = _pictDecoder->decodeImage(&file, palette);

	// For <= 8bpp, we need to convert
	if (image->format.bytesPerPixel == 1) {
		Graphics::PixelFormat format = _vm->_system->getScreenFormat();
		Graphics::Surface *output = new Graphics::Surface();
		output->create(image->w, image->h, format);

		for (uint16 y = 0; y < image->h; y++) {
			for (uint16 x = 0; x < image->w; x++) {
				byte c = *((byte *)image->getBasePtr(x, y));
				byte r = palette[c * 3];
				byte g = palette[c * 3 + 1];
				byte b = palette[c * 3 + 2];

				if (format.bytesPerPixel == 2) {
					uint16 color = format.RGBToColor(r, g, b);
					memcpy(output->getBasePtr(x, y), &color, 2);
				} else if (format.bytesPerPixel == 4) {
					uint32 color = format.RGBToColor(r, g, b);
					memcpy(output->getBasePtr(x, y), &color, 4);
				}
			}
		}

		image->free();
		delete image;
		image = output;
	}

	_cache[imageSlot].surface = image;
	return image;
}

void GraphicsManager::drawPict(Common::String filename, int x, int y, bool updateScreen) {
	Graphics::Surface *surface = decodeImage(filename);
	
	_vm->_system->copyRectToScreen((byte *)surface->pixels, surface->pitch, x, y, surface->w, surface->h);

	if (updateScreen)
		_vm->_system->updateScreen();
}

void GraphicsManager::drawPictTransparent(Common::String filename, int x, int y, uint32 transparency, bool updateScreen) {
	if (_vm->_system->getScreenFormat().bytesPerPixel == 2)
		transparency &= 0xffff;

	Graphics::Surface *surface = decodeImage(filename);
	Graphics::Surface *screen = _vm->_system->lockScreen();

	for (uint16 i = 0; i < surface->h; i++) {
		for (uint16 j = 0; j < surface->w; j++) {
			if (_vm->_system->getScreenFormat().bytesPerPixel == 2) {
				uint16 color = *((uint16 *)surface->getBasePtr(j, i));
				if (color != transparency)
					memcpy(screen->getBasePtr(j + x, i + y), &color, 2);
			} else if (_vm->_system->getScreenFormat().bytesPerPixel == 4) {
				uint32 color = *((uint32 *)surface->getBasePtr(j, i));
				if (color != transparency)
					memcpy(screen->getBasePtr(j + x, i + y), &color, 4);
			}
		}
	}

	_vm->_system->unlockScreen();

	if (updateScreen)
		_vm->_system->updateScreen();
}

uint32 GraphicsManager::getColor(byte r, byte g, byte b) {
	return _vm->_system->getScreenFormat().RGBToColor(r, g, b);
}

void GraphicsManager::setCursor(uint16 cursor) {
	Common::SeekableReadStream *cicnStream = _vm->_resFork->getResource(MKTAG('c', 'i', 'c', 'n'), cursor);
	
	// PixMap section
	Graphics::PictDecoder::PixMap pixMap = _pictDecoder->readPixMap(cicnStream);
	
	// Mask section
	cicnStream->readUint32BE(); // mask baseAddr
	uint16 maskRowBytes = cicnStream->readUint16BE(); // mask rowBytes
	cicnStream->skip(3 * 2); // mask rect
	/* uint16 maskHeight = */ cicnStream->readUint16BE();

	// Bitmap section
	cicnStream->readUint32BE(); // baseAddr
	uint16 rowBytes = cicnStream->readUint16BE();
	cicnStream->readUint16BE(); // top
	cicnStream->readUint16BE(); // left
	uint16 height = cicnStream->readUint16BE(); // bottom
	cicnStream->readUint16BE(); // right
	
	// Data section
	cicnStream->readUint32BE(); // icon handle
	cicnStream->skip(maskRowBytes * height); // FIXME: maskHeight doesn't work here, though the specs say it should
	cicnStream->skip(rowBytes * height);
	
	// Palette section
	cicnStream->readUint32BE(); // always 0
	cicnStream->readUint16BE(); // always 0
	uint16 colorCount = cicnStream->readUint16BE() + 1;
	
	byte *colors = new byte[256 * 3];;
	for (uint16 i = 0; i < colorCount; i++) {
		cicnStream->readUint16BE();
		colors[i * 3] = cicnStream->readUint16BE() >> 8;
		colors[i * 3 + 1] = cicnStream->readUint16BE() >> 8;
		colors[i * 3 + 2] = cicnStream->readUint16BE() >> 8;
	}
	
	// PixMap data
	byte *data = new byte[pixMap.rowBytes * pixMap.bounds.height()];
	cicnStream->read(data, pixMap.rowBytes * pixMap.bounds.height());
	delete cicnStream;
	
	// Now to go get the hotspots
	Common::SeekableReadStream *cursStream = NULL;
	
	if (cursor >= kMainCursor && cursor <= kGrabbingHand)
		cursStream = _vm->_resFork->getResource(MKTAG('C', 'u', 'r', 's'), kMainCursor);
	else // if (cursor == kTargetingReticle1 || cursor == kTargetingReticle2)
		cursStream = _vm->_resFork->getResource(MKTAG('C', 'u', 'r', 's'), kTargetingReticle1);

	// Go through the stream until we find the right cursor hotspot
	uint16 x = 0, y = 0;
	uint16 numHotspots = cursStream->readUint16BE();
	
	for (uint16 i = 0; i < numHotspots; i++) {
		uint16 res = cursStream->readUint16BE();
		uint16 tempX = cursStream->readUint16BE();
		uint16 tempY = cursStream->readUint16BE();
		
		if (res == cursor) {
			x = tempX;
			y = tempY;
			break;
		}
	}
	
	// We have the bitmap and the hotspot, let's do this!
	CursorMan.replaceCursorPalette(colors, 0, colorCount);
	CursorMan.replaceCursor(data, pixMap.rowBytes, pixMap.bounds.height(), x, y, 0);
	CursorMan.showMouse(true);
	_vm->_system->updateScreen();

	delete[] colors;
	delete[] data;
}

int GraphicsManager::getImageSlot(const Common::String &filename) {
	// Let's find a match, an open slot, or the oldest image slot
	uint32 oldestAge = 0xffffffff;
	int slot = 0;

	for (int i = 0; i < kImageCacheSize; i++) {
		if (_cache[i].filename.equalsIgnoreCase(filename)) {
			//warning("Found image %s at slot %d", filename.c_str(), i);
			_cache[i].lastUsed = _vm->_system->getMillis();
			return i;
		}

		if (!_cache[i].surface) {
			//warning("Putting image %s in empty slot %d", filename.c_str(), i);
			_cache[i].filename = filename;
			_cache[i].lastUsed = _vm->_system->getMillis();
			return i;
		}

		if (_cache[i].lastUsed < oldestAge) {
			oldestAge = _cache[i].lastUsed;
			slot = i;
		}
	}

	// Let's make sure that's cleaned out
	//warning("Replacing old image %s with %s in slot %d", _cache[slot].filename.c_str(), filename.c_str(), slot);
	_cache[slot].filename = filename;
	_cache[slot].surface->free();
	delete _cache[slot].surface;
	_cache[slot].surface = 0;
	_cache[slot].lastUsed = _vm->_system->getMillis();
	return slot;
}
	
} // End of namespace Pegasus