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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.
*
* $URL$
* $Id$
*
*/
#include "kyra/screen_v2.h"
#include "common/endian.h"
namespace Kyra {
uint8 *Screen_v2::generateOverlay(const uint8 *palette, uint8 *buffer, int startColor, uint16 factor) {
if (!palette || !buffer)
return buffer;
factor = MIN<uint16>(255, factor);
factor >>= 1;
factor &= 0xFF;
const byte col1 = palette[startColor * 3 + 0];
const byte col2 = palette[startColor * 3 + 1];
const byte col3 = palette[startColor * 3 + 2];
uint8 *dst = buffer;
*dst++ = 0;
for (int i = 1; i != 255; ++i) {
uint8 processedPalette[3];
const uint8 *src = palette + i*3;
byte col;
col = *src++;
col -= ((((col - col1) * factor) << 1) >> 8) & 0xFF;
processedPalette[0] = col;
col = *src++;
col -= ((((col - col2) * factor) << 1) >> 8) & 0xFF;
processedPalette[1] = col;
col = *src++;
col -= ((((col - col3) * factor) << 1) >> 8) & 0xFF;
processedPalette[2] = col;
*dst++ = findLeastDifferentColor(processedPalette, palette+3, 255)+1;
}
return buffer;
}
void Screen_v2::applyOverlay(int x, int y, int w, int h, int pageNum, const uint8 *overlay) {
if (pageNum == 0 || pageNum == 1)
addDirtyRect(x, y, w, h);
uint8 *dst = getPagePtr(pageNum) + y * 320 + x;
while (h--) {
for (int wi = 0; wi < w; ++wi) {
uint8 index = *dst;
*dst++ = overlay[index];
}
dst += 320 - w;
}
}
int Screen_v2::findLeastDifferentColor(const uint8 *paletteEntry, const uint8 *palette, uint16 numColors) {
int m = 0x7fff;
int r = 0x101;
for (int i = 0; i < numColors; i++) {
int v = paletteEntry[0] - *palette++;
int c = v * v;
v = paletteEntry[1] - *palette++;
c += (v * v);
v = paletteEntry[2] - *palette++;
c += (v * v);
if (c <= m) {
m = c;
r = i;
}
}
return r;
}
void Screen_v2::copyWsaRect(int x, int y, int w, int h, int dimState, int plotFunc, const uint8 *src,
int unk1, const uint8 *unkPtr1, const uint8 *unkPtr2) {
uint8 *dstPtr = getPagePtr(_curPage);
uint8 *origDst = dstPtr;
const ScreenDim *dim = getScreenDim(dimState);
int dimX1 = dim->sx << 3;
int dimX2 = dim->w << 3;
dimX2 += dimX1;
int dimY1 = dim->sy;
int dimY2 = dim->h;
dimY2 += dimY1;
int temp = y - dimY1;
if (temp < 0) {
if ((temp += h) <= 0)
return;
else {
SWAP(temp, h);
y += temp - h;
src += (temp - h) * w;
}
}
temp = dimY2 - y;
if (temp <= 0)
return;
if (temp < h)
h = temp;
int srcOffset = 0;
temp = x - dimX1;
if (temp < 0) {
temp = -temp;
srcOffset = temp;
x += temp;
w -= temp;
}
int srcAdd = 0;
temp = dimX2 - x;
if (temp <= 0)
return;
if (temp < w) {
SWAP(w, temp);
temp -= w;
srcAdd = temp;
}
dstPtr += y * SCREEN_W + x;
uint8 *dst = dstPtr;
if (_curPage == 0 || _curPage == 1)
addDirtyRect(x, y, w, h);
clearOverlayRect(_curPage, x, y, w, h);
temp = h;
int curY = y;
while (h--) {
src += srcOffset;
++curY;
int cW = w;
switch (plotFunc) {
case 0:
memcpy(dst, src, cW);
dst += cW; src += cW;
break;
case 1:
while (cW--) {
uint8 d = *src++;
uint8 t = unkPtr1[d];
if (t != 0xFF)
d = unkPtr2[*dst + (t << 8)];
*dst++ = d;
}
break;
case 4:
while (cW--) {
uint8 d = *src++;
if (d)
*dst = d;
++dst;
}
break;
case 5:
while (cW--) {
uint8 d = *src++;
if (d) {
uint8 t = unkPtr1[d];
if (t != 0xFF)
d = unkPtr2[*dst + (t << 8)];
*dst = d;
}
++dst;
}
break;
case 8:
case 9:
while (cW--) {
uint8 d = *src++;
uint8 t = _shapePages[0][dst - origDst] & 7;
if (unk1 < t && (curY > _maskMinY && curY < _maskMaxY))
d = _shapePages[1][dst - origDst];
*dst++ = d;
}
break;
case 12:
case 13:
while (cW--) {
uint8 d = *src++;
if (d) {
uint8 t = _shapePages[0][dst - origDst] & 7;
if (unk1 < t && (curY > _maskMinY && curY < _maskMaxY))
d = _shapePages[1][dst - origDst];
*dst++ = d;
} else {
d = _shapePages[1][dst - origDst];
*dst++ = d;
}
}
break;
default:
break;
}
dst = (dstPtr += SCREEN_W);
src += srcAdd;
}
}
const uint8 *Screen_v2::getPtrToShape(const uint8 *shpFile, int shape) {
debugC(9, kDebugLevelScreen, "Screen_v2::getPtrToShape(%p, %d)", (const void *)shpFile, shape);
uint16 shapes = READ_LE_UINT16(shpFile);
if (shapes <= shape)
return 0;
uint32 offset = READ_LE_UINT32(shpFile + (shape << 2) + 2);
return shpFile + offset + 2;
}
uint8 *Screen_v2::getPtrToShape(uint8 *shpFile, int shape) {
debugC(9, kDebugLevelScreen, "Screen_v2::getPtrToShape(%p, %d)", (void *)shpFile, shape);
uint16 shapes = READ_LE_UINT16(shpFile);
if (shapes <= shape)
return 0;
uint32 offset = READ_LE_UINT32(shpFile + (shape << 2) + 2);
return shpFile + offset + 2;
}
int Screen_v2::getShapeScaledWidth(const uint8 *shpFile, int scale) {
debugC(9, kDebugLevelScreen, "Screen_v2::getShapeScaledWidth(%p, %d)", (const void*)shpFile, scale);
int width = READ_LE_UINT16(shpFile+3);
return (width * scale) >> 8;
}
int Screen_v2::getShapeScaledHeight(const uint8 *shpFile, int scale) {
debugC(9, kDebugLevelScreen, "Screen_v2::getShapeScaledHeight(%p, %d)", (const void*)shpFile, scale);
int height = shpFile[2];
return (height * scale) >> 8;
}
uint16 Screen_v2::getShapeSize(const uint8 *shp) {
debugC(9, kDebugLevelScreen, "Screen_v2::getShapeSize(%p)", (const void *)shp);
return READ_LE_UINT16(shp+6);
}
uint8 *Screen_v2::makeShapeCopy(const uint8 *src, int index) {
debugC(9, kDebugLevelScreen, "Screen_v2::makeShapeCopy(%p, %d)", (const void *)src, index);
const uint8 *shape = getPtrToShape(src, index);
if (!shape)
return 0;
int size = getShapeSize(shape);
uint8 *copy = new uint8[size];
assert(copy);
memcpy(copy, shape, size);
return copy;
}
int Screen_v2::getLayer(int x, int y) {
debugC(9, kDebugLevelScreen, "Screen_v2::getLayer(%d, %d)", x, y);
if (x < 0)
x = 0;
else if (x >= 320)
x = 319;
if (y < 0)
y = 0;
else if (y >= 144)
y = 143;
uint8 pixel = *(getCPagePtr(5) + y * 320 + x);
pixel &= 0x7F;
pixel >>= 3;
if (pixel < 1)
pixel = 1;
else if (pixel > 15)
pixel = 15;
return pixel;
}
int Screen_v2::getRectSize(int w, int h) {
debugC(9, kDebugLevelScreen, "Screen_v2::getRectSize(%d, %d)", w, h);
if (w > 320 || h > 200)
return 0;
return w*h;
}
void Screen_v2::setTextColorMap(const uint8 *cmap) {
debugC(9, kDebugLevelScreen, "Screen_v2::setTextColorMap(%p)", (const void *)cmap);
setTextColor(cmap, 0, 15);
}
} // end of namespace Kyra
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