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https://github.com/libretro/scummvm.git
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132 lines
2.8 KiB
C++
132 lines
2.8 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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* 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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* 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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* $URL$
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* $Id$
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*
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*/
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#include "draci/screen.h"
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#include "draci/surface.h"
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namespace Draci {
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Surface::Surface(int width, int height) {
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this->create(width, height, 1);
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this->markClean();
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_transparentColour = kDefaultTransparent;
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}
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Surface::~Surface() {
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this->free();
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}
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/**
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* @brief Marks a dirty rectangle on the surface
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* @param r The rectangle to be marked dirty
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*/
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void Surface::markDirtyRect(Common::Rect r) {
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Common::List<Common::Rect>::iterator it;
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r.clip(w, h);
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if (r.isEmpty())
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return;
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it = _dirtyRects.begin();
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while (it != _dirtyRects.end()) {
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if (it->contains(r))
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return;
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if (r.contains(*it))
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it = _dirtyRects.erase(it);
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else
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++it;
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}
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_dirtyRects.push_back(r);
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}
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/**
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* @brief Marks the whole surface dirty
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*/
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void Surface::markDirty() {
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_fullUpdate = true;
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}
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/**
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* @brief Marks the whole surface clean
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*/
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void Surface::markClean() {
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_fullUpdate = false;
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_dirtyRects.clear();
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}
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/**
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* @brief Fills the surface with the specified colour
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*/
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void Surface::fill(uint colour) {
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byte *ptr = (byte *)getBasePtr(0, 0);
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memset(ptr, colour, w * h);
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}
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/**
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* @brief Calculates horizontal center of an object
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*
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* @param x The x coordinate of the center
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* @param width The width of the object to be centered (in pixels)
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*
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* @return The centered x coordinate
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*/
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uint Surface::centerOnX(int x, int width) const {
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int newX = x - width / 2;
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if (newX + width > w)
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newX = w - width;
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if (newX < 0)
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newX = 0;
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return newX;
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}
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/**
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* @brief Calculates vertical center of an object
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*
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* @param y The y coordinate of the center
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* @param height The height of the object to be centered (in pixels)
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*
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* @return The centered y coordinate
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*/
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uint Surface::putAboveY(int y, int height) const {
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int newY = y - height;
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if (newY + height > h)
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newY = h - height;
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if (newY < 0)
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newY = 0;
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return newY;
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}
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} // End of namespace Draci
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