Initial commit

engines/titanic/support/screen_manager.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 "titanic/support/screen_manager.h"
+#include "titanic/support/video_surface.h"
+#include "titanic/titanic.h"
+#include "graphics/screen.h"
+
+namespace Titanic {
+
+CScreenManager *CScreenManager::_screenManagerPtr;
+CScreenManager *CScreenManager::_currentScreenManagerPtr;
+
+CScreenManager::CScreenManager(TitanicEngine *vm): _vm(vm) {
+	_screenManagerPtr = nullptr;
+	_currentScreenManagerPtr = nullptr;
+
+	_frontRenderSurface = nullptr;
+	_mouseCursor = nullptr;
+	_textCursor = nullptr;
+	_inputHandler = nullptr;
+	_fontNumber = 0;
+
+	_screenManagerPtr = this;
+}
+
+CScreenManager::~CScreenManager() {
+	_screenManagerPtr = nullptr;
+}
+
+void CScreenManager::setWindowHandle(int v) {
+	// Not needed
+}
+
+bool CScreenManager::resetWindowHandle(int v) {
+	hideCursor();
+	return true;
+}
+
+CScreenManager *CScreenManager::setCurrent() {
+	if (!_currentScreenManagerPtr)
+		_currentScreenManagerPtr = _screenManagerPtr;
+
+	return _currentScreenManagerPtr;
+}
+
+void CScreenManager::setSurfaceBounds(SurfaceNum surfaceNum, const Rect &r) {
+	if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size())
+		_backSurfaces[surfaceNum]._bounds = r;
+	else if (surfaceNum == SURFACE_PRIMARY)
+		_frontSurfaceBounds = r;
+}
+
+int CScreenManager::setFontNumber(int fontNumber) {
+	int oldFontNumber = _fontNumber;
+	_fontNumber = fontNumber;
+	return oldFontNumber;
+}
+
+void CScreenManager::preLoad() {
+	if (_textCursor)
+		_textCursor->hide();
+}
+
+/*------------------------------------------------------------------------*/
+
+OSScreenManager::OSScreenManager(TitanicEngine *vm): CScreenManager(vm),
+		_directDrawManager(vm, false) {
+	_field48 = 0;
+	_field4C = 0;
+	_field50 = 0;
+	_field54 = 0;
+}
+
+OSScreenManager::~OSScreenManager() {
+	destroyFrontAndBackBuffers();
+	delete _mouseCursor;
+	delete _textCursor;
+}
+
+void OSScreenManager::setMode(int width, int height, int bpp, uint numBackSurfaces, bool flag2) {
+	assert(bpp == 16);
+	destroyFrontAndBackBuffers();
+	_directDrawManager.initVideo(width, height, bpp, numBackSurfaces);
+
+	_vm->_screen->create(width, height, g_system->getScreenFormat());
+	_frontRenderSurface = new OSVideoSurface(this, nullptr);
+	_frontRenderSurface->setSurface(this, _directDrawManager._mainSurface);
+
+	_backSurfaces.resize(numBackSurfaces);
+	for (uint idx = 0; idx < numBackSurfaces; ++idx) {
+		_backSurfaces[idx]._surface = new OSVideoSurface(this, nullptr);
+		_backSurfaces[idx]._surface->setSurface(this, _directDrawManager._backSurfaces[idx]);
+	}
+
+	// Load fonts
+	_fonts[0].load(149);
+	_fonts[1].load(151);
+	_fonts[2].load(152);
+	_fonts[3].load(153);
+
+	// Load the cursors
+	loadCursors();
+}
+
+void OSScreenManager::drawCursors() {
+	// The original did both text and mouse cursor drawing here.
+	// For ScummVM, we only need to worry about the text cursor
+	_textCursor->draw();
+}
+
+DirectDrawSurface *OSScreenManager::getDDSurface(SurfaceNum surfaceNum) {
+	if (surfaceNum == SURFACE_PRIMARY)
+		return _directDrawManager._mainSurface;
+	else if (surfaceNum < (int)_backSurfaces.size())
+		return _directDrawManager._backSurfaces[surfaceNum];
+	else
+		return nullptr;
+}
+
+CVideoSurface *OSScreenManager::lockSurface(SurfaceNum surfaceNum) {
+	CVideoSurface *surface = getSurface(surfaceNum);
+	surface->lock();
+	return surface;
+}
+
+void OSScreenManager::unlockSurface(CVideoSurface *surface) {
+	surface->unlock();
+}
+
+CVideoSurface *OSScreenManager::getSurface(SurfaceNum surfaceNum) const {
+	if (surfaceNum == SURFACE_PRIMARY)
+		return _frontRenderSurface;
+	else if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size())
+		return _backSurfaces[surfaceNum]._surface;
+	else
+		return nullptr;
+}
+
+void OSScreenManager::fillRect(SurfaceNum surfaceNum, Rect *rect, byte r, byte g, byte b) {
+	DirectDrawSurface *surface = getDDSurface(surfaceNum);
+	if (!surface)
+		return;
+
+	// If bounds are provided, clip and use them. Otherwise, use entire surface area
+	Rect surfaceRect(0, 0, surface->getWidth(), surface->getHeight());
+	Rect tempRect;
+
+	if (rect) {
+		tempRect = *rect;
+		tempRect.clip(surfaceRect);
+	} else {
+		tempRect = surfaceRect;
+	}
+
+	// Constrain the fill area to the set modification area of the surface
+	Rect surfaceBounds = (surfaceNum == SURFACE_PRIMARY) ? _frontSurfaceBounds :
+		_backSurfaces[surfaceNum]._bounds;
+	if (!surfaceBounds.isEmpty())
+		tempRect.constrain(surfaceBounds);
+
+	// If there is any area defined, clear it
+	if (tempRect.isValidRect())
+		surface->fillRect(&tempRect, r, g, b);
+}
+
+void OSScreenManager::blitFrom(SurfaceNum surfaceNum, CVideoSurface *src,
+		const Point *destPos, const Rect *srcRect) {
+	// Get the dest surface
+	CVideoSurface *destSurface = _frontRenderSurface;
+	if (surfaceNum < -1)
+		return;
+	if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size())
+		destSurface = _backSurfaces[surfaceNum]._surface;
+	if (!destSurface->hasSurface())
+		return;
+
+	Point destPoint = destPos ? *destPos : Point(0, 0);
+	Rect srcBounds = srcRect ? *srcRect : Rect(0, 0, src->getWidth(), src->getHeight());
+	Rect *bounds = &srcBounds;
+	Rect rect2;
+
+	Rect surfaceBounds = (surfaceNum == SURFACE_PRIMARY) ? _frontSurfaceBounds :
+		_backSurfaces[surfaceNum]._bounds;
+
+	if (!surfaceBounds.isEmpty()) {
+		// Perform clipping to the bounds of the back surface
+		rect2 = srcBounds;
+		rect2.translate(-srcBounds.left, -srcBounds.top);
+		rect2.translate(destPoint.x, destPoint.y);
+		rect2.constrain(surfaceBounds);
+
+		rect2.translate(-destPoint.x, -destPoint.y);
+		rect2.translate(srcBounds.left, srcBounds.top);
+
+		if (rect2.isEmpty())
+			return;
+
+		destPoint.x += rect2.left - srcBounds.left;
+		destPoint.y += rect2.top - srcBounds.top;
+		bounds = &rect2;
+	}
+
+	if (!bounds->isEmpty())
+		destSurface->blitFrom(destPoint, src, bounds);
+}
+
+void OSScreenManager::blitFrom(SurfaceNum surfaceNum, const Rect *rect, CVideoSurface *src, int v) {
+	// Get the dest surface
+	CVideoSurface *destSurface = _frontRenderSurface;
+	if (surfaceNum < -1)
+		return;
+	if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size())
+		destSurface = _backSurfaces[surfaceNum]._surface;
+	if (!destSurface->hasSurface())
+		return;
+
+	if (!rect->isEmpty())
+		destSurface->blitFrom(Point(rect->left, rect->top), src, rect);
+}
+
+int OSScreenManager::writeString(int surfaceNum, const Rect &destRect,
+		int yOffset, const CString &str, CTextCursor *textCursor) {
+	CVideoSurface *surface;
+	Rect bounds;
+
+	if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size()) {
+		surface = _backSurfaces[surfaceNum]._surface;
+		bounds = _backSurfaces[surfaceNum]._bounds;
+	} else if (surfaceNum == SURFACE_PRIMARY) {
+		surface = _frontRenderSurface;
+		bounds = _frontSurfaceBounds;
+	} else {
+		return -1;
+	}
+
+	return _fonts[_fontNumber].writeString(surface, destRect, bounds,
+		yOffset, str, textCursor);
+}
+
+void OSScreenManager::writeString(int surfaceNum, const Point &destPos,
+		const Rect &clipRect, const CString &str, int lineWidth) {
+	CVideoSurface *surface;
+	Rect bounds;
+
+	if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size()) {
+		surface = _backSurfaces[surfaceNum]._surface;
+		bounds = _backSurfaces[surfaceNum]._bounds;
+	} else if (surfaceNum == -1) {
+		surface = _frontRenderSurface;
+		bounds = Rect(0, 0, surface->getWidth(), surface->getHeight());
+	} else {
+		return;
+	}
+
+	Rect destRect = clipRect;
+	destRect.constrain(bounds);
+
+	_fonts[_fontNumber].writeString(surface, destPos, destRect, str, lineWidth);
+}
+
+void OSScreenManager::setFontColor(byte r, byte g, byte b) {
+	_fonts[_fontNumber].setColor(r, g, b);
+}
+
+int OSScreenManager::getTextBounds(const CString &str, int maxWidth, Point *sizeOut) const {
+	return _fonts[_fontNumber].getTextBounds(str, maxWidth, sizeOut);
+}
+
+int OSScreenManager::getFontHeight() const {
+	return _fonts[_fontNumber]._fontHeight;
+}
+
+int OSScreenManager::stringWidth(const CString &str) {
+	return _fonts[_fontNumber].stringWidth(str);
+}
+
+void OSScreenManager::frameRect(SurfaceNum surfaceNum, const Rect &rect, byte r, byte g, byte b) {
+	Rect top(rect.left, rect.top, rect.right, rect.top + 1);
+	fillRect(surfaceNum, &top, r, g, b);
+	Rect bottom(rect.left, rect.bottom - 1, rect.right, rect.bottom);
+	fillRect(surfaceNum, &bottom, r, g, b);
+	Rect left(rect.left, rect.top, rect.left + 1, rect.bottom);
+	fillRect(surfaceNum, &left, r, g, b);
+	Rect right(rect.right - 1, rect.top, rect.right, rect.bottom);
+}
+
+void OSScreenManager::clearSurface(SurfaceNum surfaceNum, Rect *bounds) {
+	if (surfaceNum == SURFACE_PRIMARY)
+		_directDrawManager._mainSurface->fill(bounds, 0);
+	else if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size())
+		_directDrawManager._backSurfaces[surfaceNum]->fill(bounds, 0);
+}
+
+void OSScreenManager::resizeSurface(CVideoSurface *surface, int width, int height, int bpp) {
+	DirectDrawSurface *ddSurface = _directDrawManager.createSurface(width, height, bpp, 0);
+	surface->setSurface(this, ddSurface);
+}
+
+CVideoSurface *OSScreenManager::createSurface(int w, int h, int bpp) {
+	DirectDrawSurface *ddSurface = _directDrawManager.createSurface(w, h, bpp, 0);
+	return new OSVideoSurface(this, ddSurface);
+}
+
+CVideoSurface *OSScreenManager::createSurface(const CResourceKey &key) {
+	return new OSVideoSurface(this, key);
+}
+
+void OSScreenManager::showCursor() {
+	CScreenManager::_screenManagerPtr->_mouseCursor->unsuppressCursor();
+}
+
+void OSScreenManager::hideCursor() {
+	CScreenManager::_screenManagerPtr->_mouseCursor->suppressCursor();
+}
+
+void OSScreenManager::destroyFrontAndBackBuffers() {
+	delete _frontRenderSurface;
+	_frontRenderSurface = nullptr;
+
+	for (uint idx = 0; idx < _backSurfaces.size(); ++idx)
+		delete _backSurfaces[idx]._surface;
+	_backSurfaces.clear();
+}
+
+void OSScreenManager::loadCursors() {
+	if (_mouseCursor) {
+		hideCursor();
+		delete _mouseCursor;
+	}
+	_mouseCursor = new CMouseCursor(this);
+
+	if (!_textCursor) {
+		_textCursor = new CTextCursor(this);
+	}
+}
+
+} // End of namespace Titanic