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-rw-r--r--engines/kyra/screen_v2.cpp337
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diff --git a/engines/kyra/screen_v2.cpp b/engines/kyra/screen_v2.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 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);
+ 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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