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-rw-r--r--engines/kyra/graphics/screen_v2.cpp461
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diff --git a/engines/kyra/graphics/screen_v2.cpp b/engines/kyra/graphics/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.
+ *
+ */
+
+#include "kyra/graphics/screen_v2.h"
+
+#include "common/endian.h"
+
+namespace Kyra {
+
+Screen_v2::Screen_v2(KyraEngine_v1 *vm, OSystem *system, const ScreenDim *dimTable, const int dimTableSize)
+ : Screen(vm, system, dimTable, dimTableSize), _wsaFrameAnimBuffer(0) {
+ _wsaFrameAnimBuffer = new uint8[1024];
+ assert(_wsaFrameAnimBuffer);
+}
+
+Screen_v2::~Screen_v2() {
+ delete[] _wsaFrameAnimBuffer;
+}
+
+uint8 *Screen_v2::generateOverlay(const Palette &pal, uint8 *buffer, int opColor, uint weight, int maxColor) {
+ if (!buffer)
+ return buffer;
+
+ weight = MIN<uint>(weight, 255) >> 1;
+
+ const byte opR = pal[opColor * 3 + 0];
+ const byte opG = pal[opColor * 3 + 1];
+ const byte opB = pal[opColor * 3 + 2];
+
+ uint8 *dst = buffer;
+ *dst++ = 0;
+
+ int maxIndex = maxColor;
+ if (maxIndex == -1) {
+ if (_vm->game() == GI_LOL) {
+ if (_use16ColorMode)
+ maxIndex = 255;
+ else
+ maxIndex = 127;
+ } else {
+ maxIndex = 255;
+ }
+ }
+
+ for (int i = 1; i != 256; ++i) {
+ const byte curR = pal[i * 3 + 0] - (((pal[i * 3 + 0] - opR) * weight) >> 7);
+ const byte curG = pal[i * 3 + 1] - (((pal[i * 3 + 1] - opG) * weight) >> 7);
+ const byte curB = pal[i * 3 + 2] - (((pal[i * 3 + 2] - opB) * weight) >> 7);
+
+ uint16 idxSum = _use16ColorMode ? 0xFFFF : 0x7FFF;
+ byte index = opColor;
+
+ for (int curIdx = 1; curIdx <= maxIndex; ++curIdx) {
+ if (!_use16ColorMode && i == curIdx)
+ continue;
+
+ int diff = 0;
+ uint16 sum = 0;
+
+ diff = pal[curIdx * 3 + 0] - curR;
+ sum += diff * diff;
+ diff = pal[curIdx * 3 + 1] - curG;
+ sum += diff * diff;
+ diff = pal[curIdx * 3 + 2] - curB;
+ sum += diff * diff;
+
+ if (!sum) {
+ index = curIdx;
+ break;
+ }
+
+ if (sum <= idxSum) {
+ if (!_use16ColorMode || (curIdx == opColor || curIdx != i)) {
+ idxSum = sum;
+ index = curIdx;
+ }
+ }
+ }
+
+ *dst++ = index;
+ }
+
+ 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 Palette &pal, uint8 firstColor, uint16 numColors, bool skipSpecialColors) {
+ int m = 0x7FFF;
+ int r = 0x101;
+
+ for (int i = 0; i < numColors; i++) {
+ if (skipSpecialColors && i >= 0xC0 && i <= 0xC3)
+ continue;
+
+ int v = paletteEntry[0] - pal[(i + firstColor) * 3 + 0];
+ int c = v * v;
+ v = paletteEntry[1] - pal[(i + firstColor) * 3 + 1];
+ c += (v * v);
+ v = paletteEntry[2] - pal[(i + firstColor) * 3 + 2];
+ c += (v * v);
+
+ if (c <= m) {
+ m = c;
+ r = i;
+ }
+ }
+
+ return r;
+}
+
+void Screen_v2::getFadeParams(const Palette &pal, int delay, int &delayInc, int &diff) {
+ int maxDiff = 0;
+ diff = 0;
+ for (int i = 0; i < pal.getNumColors() * 3; ++i) {
+ diff = ABS(pal[i] - (*_screenPalette)[i]);
+ maxDiff = MAX(maxDiff, diff);
+ }
+
+ delayInc = delay << 8;
+ if (maxDiff != 0) {
+ delayInc /= maxDiff;
+ delayInc = MIN(delayInc, 0x7FFF);
+ }
+
+ delay = delayInc;
+ for (diff = 1; diff <= maxDiff; ++diff) {
+ if (delayInc >= 256)
+ break;
+ delayInc += delay;
+ }
+}
+
+bool Screen_v2::timedPaletteFadeStep(uint8 *pal1, uint8 *pal2, uint32 elapsedTime, uint32 totalTime) {
+ Palette &p1 = getPalette(1);
+
+ bool res = false;
+ for (int i = 0; i < p1.getNumColors() * 3; i++) {
+ uint8 out = 0;
+
+ if (elapsedTime < totalTime) {
+ int32 d = ((pal2[i] & 0x3F) - (pal1[i] & 0x3F));
+ if (d)
+ res = true;
+
+ int32 val = ((((d << 8) / (int32)totalTime) * (int32)elapsedTime) >> 8);
+ out = ((pal1[i] & 0x3F) + (int8)val);
+ } else {
+ out = p1[i] = (pal2[i] & 0x3F);
+ res = false;
+ }
+
+ (*_internFadePalette)[i] = out;
+ }
+
+ setScreenPalette(*_internFadePalette);
+ updateScreen();
+
+ return res;
+}
+
+const uint8 *Screen_v2::getPtrToShape(const uint8 *shpFile, int 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) {
+ 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) {
+ if (!shpFile)
+ return 0;
+ int width = READ_LE_UINT16(shpFile + 3);
+ return (width * scale) >> 8;
+}
+
+int Screen_v2::getShapeScaledHeight(const uint8 *shpFile, int scale) {
+ if (!shpFile)
+ return 0;
+ int height = shpFile[2];
+ return (height * scale) >> 8;
+}
+
+uint16 Screen_v2::getShapeSize(const uint8 *shp) {
+ if (!shp)
+ return 0;
+ return READ_LE_UINT16(shp + 6);
+}
+
+uint8 *Screen_v2::makeShapeCopy(const uint8 *src, int 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) {
+ 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) {
+ if (w > 320 || h > 200)
+ return 0;
+ return w * h;
+}
+
+void Screen_v2::setTextColorMap(const uint8 *cmap) {
+ setTextColor(cmap, 0, 15);
+}
+
+void Screen_v2::wsaFrameAnimationStep(int x1, int y1, int x2, int y2,
+ int w1, int h1, int w2, int h2, int srcPage, int dstPage, int dim) {
+
+ if (!w1 || !h1 || !w2 || !h2)
+ return;
+
+ ScreenDim cdm = *getScreenDim(dim);
+ cdm.sx <<= 3;
+ cdm.w <<= 3;
+
+ int na = 0, nb = 0, nc = w2;
+
+ if (!calcBounds(cdm.w, cdm.h, x2, y2, w2, h2, na, nb, nc))
+ return;
+
+ const uint8 *src = getPagePtr(srcPage) + y1 * 320;
+ uint8 *dst = getPagePtr(dstPage) + (y2 + cdm.sy) * 320;
+
+ int u = -1;
+
+ do {
+ int t = (nb * h1) / h2;
+ if (t != u) {
+ u = t;
+ const uint8 *s = src + x1 + t * 320;
+ uint8 *dt = (uint8 *)_wsaFrameAnimBuffer;
+
+ t = w2 - w1;
+ if (!t) {
+ memcpy(dt, s, w2);
+ } else if (t > 0) {
+ if (w1 == 1) {
+ memset(dt, *s, w2);
+ } else {
+ t = ((((((w2 - w1 + 1) & 0xFFFF) << 8) / w1) + 0x100) & 0xFFFF) << 8;
+ int bp = 0;
+ for (int i = 0; i < w1; i++) {
+ int cnt = (t >> 16);
+ bp += (t & 0xFFFF);
+ if (bp > 0xFFFF) {
+ bp -= 0xFFFF;
+ cnt++;
+ }
+ memset(dt, *s++, cnt);
+ dt += cnt;
+ }
+ }
+ } else {
+ if (w2 == 1) {
+ *dt = *s;
+ } else {
+ t = (((((w1 - w2) & 0xFFFF) << 8) / w2) & 0xFFFF) << 8;
+ int bp = 0;
+ for (int i = 0; i < w2; i++) {
+ *dt++ = *s++;
+ bp += (t & 0xFFFF);
+ if (bp > 0xFFFF) {
+ bp -= 0xFFFF;
+ s++;
+ }
+ s += (t >> 16);
+ }
+ }
+ }
+ }
+ memcpy(dst + x2 + cdm.sx, _wsaFrameAnimBuffer + na, w2);
+ dst += 320;
+ } while (++nb < h2);
+
+ if (!dstPage)
+ addDirtyRect(x2, y2, w2, h2);
+}
+
+void Screen_v2::copyPageMemory(int srcPage, int srcPos, int dstPage, int dstPos, int numBytes) {
+ const uint8 *src = getPagePtr(srcPage) + srcPos;
+ uint8 *dst = getPagePtr(dstPage) + dstPos;
+ memcpy(dst, src, numBytes);
+}
+
+void Screen_v2::copyRegionEx(int srcPage, int srcW, int srcH, int dstPage, int dstX, int dstY, int dstW, int dstH, const ScreenDim *dim, bool flag) {
+ int x0 = dim->sx << 3;
+ int y0 = dim->sy;
+ int w0 = dim->w << 3;
+ int h0 = dim->h;
+
+ int x1 = dstX;
+ int y1 = dstY;
+ int w1 = dstW;
+ int h1 = dstH;
+
+ int x2, y2, w2;
+
+ calcBounds(w0, h0, x1, y1, w1, h1, x2, y2, w2);
+
+ const uint8 *src = getPagePtr(srcPage) + (320 * srcH) + srcW;
+ uint8 *dst = getPagePtr(dstPage) + 320 * (y0 + y1);
+
+ for (int y = 0; y < h1; y++) {
+ const uint8 *s = src + x2;
+ uint8 *d = dst + x0 + x1;
+
+ if (flag)
+ d += (h1 >> 1);
+
+ for (int x = 0; x < w1; x++) {
+ if (*s)
+ *d = *s;
+ s++;
+ d++;
+ }
+ dst += 320;
+ src += 320;
+ }
+}
+
+bool Screen_v2::calcBounds(int w0, int h0, int &x1, int &y1, int &w1, int &h1, int &x2, int &y2, int &w2) {
+ x2 = 0;
+ y2 = 0;
+ w2 = w1;
+
+ int t = x1 + w1;
+ if (t < 1) {
+ w1 = h1 = -1;
+ } else {
+ if (t <= x1) {
+ x2 = w1 - t;
+ w1 = t;
+ x1 = 0;
+ }
+ t = w0 - x1;
+ if (t < 1) {
+ w1 = h1 = -1;
+ } else {
+ if (t <= w1) {
+ w1 = t;
+ }
+ w2 -= w1;
+ t = h1 + y1;
+ if (t < 1) {
+ w1 = h1 = -1;
+ } else {
+ if (t <= y1) {
+ y2 = h1 - t;
+ h1 = t;
+ y1 = 0;
+ }
+ t = h0 - y1;
+ if (t < 1) {
+ w1 = h1 = -1;
+ } else {
+ if (t <= h1) {
+ h1 = t;
+ }
+ }
+ }
+ }
+ }
+
+ return w1 != -1;
+}
+
+void Screen_v2::checkedPageUpdate(int srcPage, int dstPage) {
+ const uint32 *src = (const uint32 *)getPagePtr(srcPage);
+ uint32 *dst = (uint32 *)getPagePtr(dstPage);
+ uint32 *page0 = (uint32 *)getPagePtr(0);
+
+ bool updated = false;
+
+ for (int y = 0; y < 200; ++y) {
+ for (int x = 0; x < 80; ++x, ++src, ++dst, ++page0) {
+ if (*src != *dst) {
+ updated = true;
+ *dst = *page0 = *src;
+ }
+ }
+ }
+
+ if (updated)
+ addDirtyRect(0, 0, 320, 200);
+}
+
+} // End of namespace Kyra
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