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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 "titanic/star_control/surface_area.h"
namespace Titanic {
CSurfaceArea::CSurfaceArea(CVideoSurface *surface) {
_width = surface->getWidth();
_height = surface->getHeight();
_pitch = surface->getPitch();
_field0 = 0;
_colorMask = _color = 0;
_mode = SA_NONE;
// Original supported other pixel depths
_bpp = surface->getPixelDepth();
_pixelsPtr = (byte *)surface->getPixels();
assert(_bpp == 2 && _pixelsPtr);
initialize();
}
void CSurfaceArea::initialize() {
_bounds = Rect(0, 0, _width - 1, _height - 1);
_centroid = FPoint(_width / 2.0, _height / 2.0);
_pixel = 0xffffff;
_field27 = _field26 = _field25 = 0;
_field24 = 0;
_rgb = _field2C = 0;
_mode = SA_NONE;
}
void CSurfaceArea::setColor(uint rgb) {
switch (_mode) {
case SA_MODE1:
_color = 0;
_colorMask = rgb;
break;
case SA_MODE2:
_color = rgb;
_colorMask = ~rgb;
break;
case SA_MODE3:
_color = rgb;
_colorMask = 0xFFFFFFFF;
break;
case SA_MODE4:
_color = 0;
_colorMask = ~rgb;
break;
default:
break;
}
}
SurfaceAreaMode CSurfaceArea::setMode(SurfaceAreaMode mode) {
SurfaceAreaMode oldMode = _mode;
_mode = mode;
setColor(_color);
return oldMode;
}
void CSurfaceArea::setColorFromPixel() {
pixelToRGB(_pixel, &_rgb);
setColor(_rgb);
}
void CSurfaceArea::pixelToRGB(uint pixel, uint *rgb) {
switch (_bpp) {
case 0:
*rgb = 0;
break;
case 1:
case 2: {
uint r = pixel & 0xF8;
uint g = (pixel >> 8) & 0xf8;
uint b = ((pixel >> 16) & 0xff) >> 3;
uint value = (((r << 5) | g) << 2) | b;
value &= 0xffff;
*rgb = (value << 16) | value;
break;
}
case 3:
case 4:
*rgb = pixel;
break;
}
}
double CSurfaceArea::fillRect(const FRect &rect) {
if (rect.empty())
return rect.top;
double xp = rect.left, yp = rect.top;
FRect r = rect;
// edx=flags1, esi=flags2
int flags1 = (r.left < _bounds.left ? 1 : 0)
| (r.left > _bounds.right ? 2 : 0)
| (r.top < _bounds.top ? 4 : 0)
| (r.top > _bounds.bottom ? 8 : 0);
int flags2 = (r.right < _bounds.left ? 1 : 0)
| (r.right > _bounds.right ? 2 : 0)
| (r.bottom < _bounds.top ? 4 : 0)
| (r.bottom > _bounds.bottom ? 8 : 0);
// Handle any clipping
while (flags1 | flags2) {
if (flags1 & flags2)
return r.top;
int flags = flags1 ? flags1 : flags2;
if ((flags & 1) || (flags & 2)) {
xp = (flags & 1) ? _bounds.left : _bounds.right;
yp = (r.bottom - r.top) * (xp - r.left) / (r.right - r.left) + r.top;
} else if ((flags & 4) || (flags & 8)) {
yp = (flags & 4) ? _bounds.top : _bounds.bottom;
xp = (r.right - r.left) * (yp - r.top) / (r.bottom - r.top) + r.left;
}
if (flags == flags1) {
r.left = xp;
r.top = yp;
flags1 = 0;
if (xp < _bounds.left)
flags1 |= 1;
if (xp > _bounds.right)
flags1 |= 2;
if (yp < _bounds.top)
flags1 |= 4;
if (yp > _bounds.bottom)
flags1 |= 8;
} else {
r.right = xp;
r.bottom = yp;
flags2 = 0;
if (xp < _bounds.left)
flags2 |= 1;
if (xp > _bounds.right)
flags2 |= 2;
if (yp < _bounds.top)
flags2 |= 4;
if (yp > _bounds.bottom)
flags2 |= 8;
}
}
Common::Rect rr((int)(MIN(r.left, r.right) - 0.5), (int)(MIN(r.top, r.bottom) - 0.5),
(int)(MAX(r.left, r.right) - 0.5), (int)(MAX(r.top, r.bottom) - 0.5));
Graphics::Surface s;
s.setPixels(_pixelsPtr);
s.pitch = _pitch;
s.w = _width;
s.h = _height;
switch (_bpp) {
case 0:
s.format = Graphics::PixelFormat::createFormatCLUT8();
break;
case 1:
case 2:
s.format = Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0);
break;
case 4:
s.format = Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0);
break;
default:
error("Unknown bpp");
}
// Fill area
if (_mode == SA_NONE) {
s.fillRect(rr, _rgb);
} else {
colorRect(s, rr, _colorMask, _color);
}
/*
int yInc = 1;
byte *lineStartP = (byte *)_pixelsPtr + rr.top * _pitch;
int width2 = rr.width() / 2;
int height2 = rr.height() / 2;
int xInc = _pitch;
if (xInc < 0) {
--xInc;
yInc = -1;
}
// rr: left=esi, edi=top, ebx=right, edx=bottom
// ecx=lineStartP; ebp=width2, edx=height2
if (_mode == SA_NONE) {
switch (_bpp) {
default:
break;
}
} else {
switch (_bpp) {
default:
break;
}
}
// Lots more functionality
*/
return r.top;
}
template<typename T>
static void colorRectFn(Graphics::Surface &s, const Common::Rect &r,
uint andMask, uint xorMask) {
for (int yp = r.top; yp < r.bottom; ++yp) {
T *pixelP = (T *)s.getBasePtr(r.left, yp);
for (int xp = r.left; xp < r.right; ++xp, ++pixelP)
*pixelP = (*pixelP & andMask) ^ xorMask;
}
}
void CSurfaceArea::colorRect(Graphics::Surface &s, const Common::Rect &r,
uint andMask, uint xorMask) {
switch (s.format.bytesPerPixel) {
case 1:
colorRectFn<byte>(s, r, andMask, xorMask);
break;
case 2:
colorRectFn<uint16>(s, r, andMask, xorMask);
break;
default:
colorRectFn<uint32>(s, r, andMask, xorMask);
break;
}
}
} // End of namespace Titanic
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