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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 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 "sherlock/surface.h"
#include "sherlock/sherlock.h"
#include "common/system.h"
#include "graphics/palette.h"
namespace Sherlock {
Surface::Surface(uint16 width, uint16 height): _freePixels(true) {
create(width, height);
}
Surface::Surface() : _freePixels(false) {
}
Surface::~Surface() {
if (_freePixels)
free();
}
/**
* Sets up an internal surface with the specified dimensions that will be automatically freed
* when the surface object is destroyed
*/
void Surface::create(uint16 width, uint16 height) {
if (_freePixels)
free();
Graphics::Surface::create(width, height, Graphics::PixelFormat::createFormatCLUT8());
_freePixels = true;
}
/**
* Copy a surface into this one
*/
void Surface::blitFrom(const Graphics::Surface &src) {
blitFrom(src, Common::Point(0, 0));
}
/**
* Draws a surface at a given position within this surface
*/
void Surface::blitFrom(const Graphics::Surface &src, const Common::Point &pt) {
blitFrom(src, pt, Common::Rect(0, 0, src.w, src.h));
}
/**
* Draws a sub-section of a surface at a given position within this surface
*/
void Surface::blitFrom(const Graphics::Surface &src, const Common::Point &pt,
const Common::Rect &srcBounds) {
Common::Rect srcRect = srcBounds;
Common::Rect destRect(pt.x, pt.y, pt.x + srcRect.width(), pt.y + srcRect.height());
if (srcRect.isValidRect() && clip(srcRect, destRect)) {
// Surface is at least partially or completely on-screen
addDirtyRect(destRect);
copyRectToSurface(src, destRect.left, destRect.top, srcRect);
}
}
/**
* Draws an image frame at a given position within this surface with transparency
*/
void Surface::transBlitFrom(const ImageFrame &src, const Common::Point &pt,
bool flipped, int overrideColor) {
transBlitFrom(src._frame, pt + src._offset, flipped, overrideColor);
}
/**
* Draws a surface at a given position within this surface with transparency
*/
void Surface::transBlitFrom(const Graphics::Surface &src, const Common::Point &pt,
bool flipped, int overrideColor) {
Common::Rect drawRect(0, 0, src.w, src.h);
Common::Rect destRect(pt.x, pt.y, pt.x + src.w, pt.y + src.h);
// Clip the display area to on-screen
if (!clip(drawRect, destRect))
// It's completely off-screen
return;
if (flipped)
drawRect = Common::Rect(src.w - drawRect.right, src.h - drawRect.bottom,
src.w - drawRect.left, src.h - drawRect.top);
Common::Point destPt(destRect.left, destRect.top);
addDirtyRect(Common::Rect(destPt.x, destPt.y, destPt.x + drawRect.width(),
destPt.y + drawRect.height()));
// Draw loop
const int TRANSPARENCY = 0xFF;
for (int yp = 0; yp < drawRect.height(); ++yp) {
const byte *srcP = (const byte *)src.getBasePtr(
flipped ? drawRect.right - 1 : drawRect.left, drawRect.top + yp);
byte *destP = (byte *)getBasePtr(destPt.x, destPt.y + yp);
for (int xp = 0; xp < drawRect.width(); ++xp, ++destP) {
if (*srcP != TRANSPARENCY)
*destP = overrideColor ? overrideColor : *srcP;
srcP = flipped ? srcP - 1 : srcP + 1;
}
}
}
/**
* Fill a given area of the surface with a given color
*/
void Surface::fillRect(int x1, int y1, int x2, int y2, byte color) {
fillRect(Common::Rect(x1, y1, x2, y2), color);
}
/**
* Fill a given area of the surface with a given color
*/
void Surface::fillRect(const Common::Rect &r, byte color) {
Graphics::Surface::fillRect(r, color);
addDirtyRect(r);
}
/**
* Clips the given source bounds so the passed destBounds will be entirely on-screen
*/
bool Surface::clip(Common::Rect &srcBounds, Common::Rect &destBounds) {
if (destBounds.left >= this->w || destBounds.top >= this->h ||
destBounds.right <= 0 || destBounds.bottom <= 0)
return false;
// Clip the bounds if necessary to fit on-screen
if (destBounds.right > this->w) {
srcBounds.right -= destBounds.right - this->w;
destBounds.right = this->w;
}
if (destBounds.bottom > this->h) {
srcBounds.bottom -= destBounds.bottom - this->h;
destBounds.bottom = this->h;
}
if (destBounds.top < 0) {
srcBounds.top += -destBounds.top;
destBounds.top = 0;
}
if (destBounds.left < 0) {
srcBounds.left += -destBounds.left;
destBounds.left = 0;
}
return true;
}
} // End of namespace Sherlock
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