Initial commit

engines/mohawk/graphics.cpp

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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 "mohawk/mohawk.h"
+#include "mohawk/resource.h"
+#include "mohawk/graphics.h"
+
+#include "common/system.h"
+#include "engines/util.h"
+#include "graphics/paletteman.h"
+
+namespace Mohawk {
+
+MohawkSurface::MohawkSurface() : _surface(nullptr), _palette(nullptr) {
+	_offsetX = 0;
+	_offsetY = 0;
+}
+
+MohawkSurface::MohawkSurface(Graphics::Surface *surface, byte *palette, int offsetX, int offsetY) : _palette(palette), _offsetX(offsetX), _offsetY(offsetY) {
+	assert(surface);
+
+	_surface = surface;
+}
+
+MohawkSurface::~MohawkSurface() {
+	free(_palette);
+
+	if (_surface) {
+		_surface->free();
+		delete _surface;
+	}
+}
+
+void MohawkSurface::convertToTrueColor() {
+	assert(_surface);
+
+	if (_surface->format.bytesPerPixel > 1)
+		return;
+
+	assert(_palette);
+
+	Graphics::Surface *surface = _surface->convertTo(g_system->getScreenFormat(), _palette);
+
+	// Free everything and set the new surface as the converted surface
+	_surface->free();
+	delete _surface;
+	free(_palette);
+	_palette = nullptr;
+	_surface = surface;
+}
+
+GraphicsManager::GraphicsManager() {
+}
+
+GraphicsManager::~GraphicsManager() {
+	clearCache();
+}
+
+void GraphicsManager::clearCache() {
+	for (Common::HashMap<uint16, MohawkSurface *>::iterator it = _cache.begin(); it != _cache.end(); it++)
+		delete it->_value;
+	for (Common::HashMap<uint16, Common::Array<MohawkSurface *> >::iterator it = _subImageCache.begin(); it != _subImageCache.end(); it++) {
+		Common::Array<MohawkSurface *> &array = it->_value;
+		for (uint i = 0; i < array.size(); i++)
+			delete array[i];
+	}
+
+	_cache.clear();
+	_subImageCache.clear();
+}
+
+MohawkSurface *GraphicsManager::findImage(uint16 id) {
+	if (!_cache.contains(id))
+		_cache[id] = decodeImage(id);
+
+	// TODO: Probably would be nice to limit the size of the cache
+	// Currently, this can't get large because it is freed on every
+	// card/stack change in Myst/Riven so I'm not worried about it.
+	// Doesn't mean this shouldn't be done in the future.
+
+	return _cache[id];
+}
+
+Common::Array<MohawkSurface *> GraphicsManager::decodeImages(uint16 id) {
+	error("decodeImages not implemented for this game");
+}
+
+void GraphicsManager::preloadImage(uint16 image) {
+	findImage(image);
+}
+
+void GraphicsManager::setPalette(uint16 id) {
+	Common::SeekableReadStream *tpalStream = getVM()->getResource(ID_TPAL, id);
+
+	uint16 colorStart = tpalStream->readUint16BE();
+	uint16 colorCount = tpalStream->readUint16BE();
+	byte *palette = new byte[colorCount * 3];
+
+	for (uint16 i = 0; i < colorCount; i++) {
+		palette[i * 3 + 0] = tpalStream->readByte();
+		palette[i * 3 + 1] = tpalStream->readByte();
+		palette[i * 3 + 2] = tpalStream->readByte();
+		tpalStream->readByte();
+	}
+
+	delete tpalStream;
+
+	getVM()->_system->getPaletteManager()->setPalette(palette, colorStart, colorCount);
+	delete[] palette;
+}
+
+void GraphicsManager::copyAnimImageToScreen(uint16 image, int left, int top) {
+	Graphics::Surface *surface = findImage(image)->getSurface();
+
+	Common::Rect srcRect(0, 0, surface->w, surface->h);
+	Common::Rect dstRect(left, top, left + surface->w, top + surface->h);
+	copyAnimImageSectionToScreen(image, srcRect, dstRect);
+}
+
+void GraphicsManager::copyAnimImageSectionToScreen(uint16 image, Common::Rect srcRect, Common::Rect dstRect) {
+	copyAnimImageSectionToScreen(findImage(image), srcRect, dstRect);
+}
+
+void GraphicsManager::copyAnimSubImageToScreen(uint16 image, uint16 subimage, int left, int top) {
+	if (!_subImageCache.contains(image))
+		_subImageCache[image] = decodeImages(image);
+	Common::Array<MohawkSurface *> &images = _subImageCache[image];
+
+	Graphics::Surface *surface = images[subimage]->getSurface();
+
+	Common::Rect srcRect(0, 0, surface->w, surface->h);
+	Common::Rect dstRect(left, top, left + surface->w, top + surface->h);
+	copyAnimImageSectionToScreen(images[subimage], srcRect, dstRect);
+}
+
+void GraphicsManager::getSubImageSize(uint16 image, uint16 subimage, uint16 &width, uint16 &height) {
+	if (!_subImageCache.contains(image))
+		_subImageCache[image] = decodeImages(image);
+	Common::Array<MohawkSurface *> &images = _subImageCache[image];
+
+	Graphics::Surface *surface = images[subimage]->getSurface();
+	width = surface->w;
+	height = surface->h;
+}
+
+void GraphicsManager::copyAnimImageSectionToScreen(MohawkSurface *image, Common::Rect srcRect, Common::Rect dstRect) {
+	uint16 startX = 0;
+	uint16 startY = 0;
+
+	assert(srcRect.isValidRect() && dstRect.isValidRect());
+	assert(srcRect.left >= 0 && srcRect.top >= 0);
+
+	// TODO: clip rect
+	if (dstRect.left < 0) {
+		startX -= dstRect.left;
+		dstRect.left = 0;
+	}
+
+	if (dstRect.top < 0) {
+		startY -= dstRect.top;
+		dstRect.top = 0;
+	}
+
+	if (dstRect.left >= getVM()->_system->getWidth())
+		return;
+	if (dstRect.top >= getVM()->_system->getHeight())
+		return;
+
+	Graphics::Surface *surface = image->getSurface();
+	if (startX >= surface->w)
+		return;
+	if (startY >= surface->h)
+		return;
+
+	if (srcRect.left > surface->w)
+		return;
+	if (srcRect.top > surface->h)
+		return;
+	if (srcRect.right > surface->w)
+		srcRect.right = surface->w;
+	if (srcRect.bottom > surface->h)
+		srcRect.bottom = surface->h;
+
+	uint16 width = MIN<int>(srcRect.right - srcRect.left - startX, getVM()->_system->getWidth() - dstRect.left);
+	uint16 height = MIN<int>(srcRect.bottom - srcRect.top - startY, getVM()->_system->getHeight() - dstRect.top);
+
+	byte *surf = (byte *)surface->getBasePtr(0, srcRect.top + startY);
+	Graphics::Surface *screen = getVM()->_system->lockScreen();
+
+	// image and screen should always be 8bpp
+	for (uint16 y = 0; y < height; y++) {
+		byte *dest = (byte *)screen->getBasePtr(dstRect.left, dstRect.top + y);
+		byte *src = surf + srcRect.left + startX;
+		// blit, with 0 being transparent
+		for (uint16 x = 0; x < width; x++) {
+			if (*src)
+				*dest = *src;
+			src++;
+			dest++;
+		}
+		surf += surface->pitch;
+	}
+
+	getVM()->_system->unlockScreen();
+}
+
+void GraphicsManager::addImageToCache(uint16 id, MohawkSurface *surface) {
+	if (_cache.contains(id))
+		error("Image %d already in cache", id);
+
+	_cache[id] = surface;
+}
+
+} // End of namespace Mohawk