mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-22 18:02:05 +00:00
280 lines
6.4 KiB
C++
280 lines
6.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/endian.h"
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#include "kyra/kyra_v2.h"
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#include "kyra/screen_v2.h"
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namespace Kyra {
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Screen_v2::Screen_v2(KyraEngine_v2 *vm, OSystem *system)
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: ScreenEx(vm, system) {
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_vm = vm;
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_wsaFrameAnimBuffer = new uint8[1024];
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}
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Screen_v2::~Screen_v2() {
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delete [] _wsaFrameAnimBuffer;
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}
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void Screen_v2::setScreenDim(int dim) {
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debugC(9, kDebugLevelScreen, "Screen_v2::setScreenDim(%d)", dim);
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assert(dim < _screenDimTableCount);
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_curDim = &_screenDimTable[dim];
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}
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const ScreenDim *Screen_v2::getScreenDim(int dim) {
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debugC(9, kDebugLevelScreen, "Screen_v2::getScreenDim(%d)", dim);
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assert(dim < _screenDimTableCount);
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return &_screenDimTable[dim];
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}
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void Screen_v2::generateGrayOverlay(const uint8 *srcPal, uint8 *grayOverlay, int factor, int addR, int addG, int addB, int lastColor, bool flag) {
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uint8 tmpPal[768];
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for (int i = 0; i != lastColor; i++) {
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if (flag) {
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int v = ((((srcPal[3 * i] & 0x3f) + (srcPal[3 * i + 1] & 0x3f)
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+ (srcPal[3 * i + 2] & 0x3f)) / 3) * factor) / 0x40;
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tmpPal[3 * i] = tmpPal[3 * i + 1] = tmpPal[3 * i + 2] = v & 0xff;
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} else {
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int v = (((srcPal[3 * i] & 0x3f) * factor) / 0x40) + addR;
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tmpPal[3 * i] = (v > 0x3f) ? 0x3f : v & 0xff;
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v = (((srcPal[3 * i + 1] & 0x3f) * factor) / 0x40) + addG;
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tmpPal[3 * i + 1] = (v > 0x3f) ? 0x3f : v & 0xff;
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v = (((srcPal[3 * i + 2] & 0x3f) * factor) / 0x40) + addB;
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tmpPal[3 * i + 2] = (v > 0x3f) ? 0x3f : v & 0xff;
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}
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}
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for (int i = 0; i < lastColor; i++)
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grayOverlay[i] = findLeastDifferentColor(tmpPal + 3 * i, srcPal, lastColor);
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}
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void Screen_v2::wsaFrameAnimationStep(int x1, int y1, int x2, int y2,
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int w1, int h1, int w2, int h2, int srcPage, int dstPage, int dim) {
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if (!(w1 || h1 || w2 || h2))
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return;
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ScreenDim cdm = _screenDimTable[dim];
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cdm.sx <<= 3;
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cdm.w <<= 3;
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int na = 0, nb = 0, nc = w2;
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if (!calcBounds(cdm.w, cdm.h, x2, y2, w2, h2, na, nb, nc))
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return;
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const uint8 *src = getPagePtr(srcPage) + y1 * 320;
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uint8 *dst = getPagePtr(dstPage) + (y2 + cdm.sy) * 320;
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int u = -1;
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do {
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int t = (nb * h1) / h2;
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if (t != u) {
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u = t;
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const uint8 *s = src + (x1 + t) * 320;
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uint8 *dt = (uint8*) _wsaFrameAnimBuffer;
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t = w2 - w1;
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if (!t) {
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memcpy(dt, s, w2);
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} else if (t > 0) {
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if (w1 == 1) {
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memset(dt, *s, w2);
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} else {
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t = ((((((w2 - w1 + 1) & 0xffff) << 8) / w1) + 0x100) & 0xffff) << 8;
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int bp = 0;
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for (int i = 0; i < w1; i++) {
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int cnt = (t >> 16);
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bp += (t & 0xffff);
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if (bp > 0xffff) {
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bp -= 0xffff;
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cnt++;
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}
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memset(dt, *s++, cnt);
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dt += cnt;
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}
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}
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} else {
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if (w2 == 1) {
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*dt = *s;
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} else {
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t = (((((w1 - w2) & 0xffff) << 8) / w2) & 0xffff) << 8;
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int bp = 0;
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for (int i = 0; i < w2; i++) {
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*dt++ = *s++;
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bp += (t & 0xffff);
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if (bp > 0xffff) {
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bp -= 0xffff;
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s++;
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}
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s += (t >> 16);
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}
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}
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}
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}
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memcpy(dst + x2 + cdm.sx, _wsaFrameAnimBuffer + na, w2);
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dst += 320;
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} while (++nb < h2);
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}
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void Screen_v2::cmpFadeFrameStep(int srcPage, int srcW, int srcH, int srcX, int srcY, int dstPage, int dstW,
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int dstH, int dstX, int dstY, int cmpW, int cmpH, int cmpPage) {
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if (!(cmpW || cmpH ))
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return;
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int r1, r2, r3, r4, r5, r6;
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int X1 = srcX;
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int Y1 = srcY;
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int W1 = cmpW;
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int H1 = cmpH;
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if (!calcBounds(srcW, srcH, X1, Y1, W1, H1, r1, r2, r3))
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return;
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int X2 = dstX;
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int Y2 = dstY;
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int W2 = W1;
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int H2 = H1;
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if (!calcBounds(dstW, dstH, X2, Y2, W2, H2, r4, r5, r6))
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return;
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const uint8 *src = getPagePtr(srcPage) + srcW * (Y1 + r5);
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uint8 *dst = getPagePtr(dstPage) + dstW * (Y2 + r2);
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const uint8 *cmp = getPagePtr(cmpPage);
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while (H2--) {
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const uint8 *s = src + r4 + X1;
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uint8 *d = dst + r1 + X2;
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for (int i = 0; i < W2; i++) {
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int ix = (*s++ << 8) + *d;
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*d++ = cmp[ix];
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}
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src += W1;
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dst += W2;
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}
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}
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void Screen_v2::copyPageMemory(int srcPage, int srcPos, int dstPage, int dstPos, int numBytes) {
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const uint8 *src = getPagePtr(srcPage) + srcPos;
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uint8 *dst = getPagePtr(dstPage) + dstPos;
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memcpy(dst, src, numBytes);
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}
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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) {
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int x0 = dim->sx << 3;
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int y0 = dim->sy;
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int w0 = dim->w << 3;
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int h0 = dim->h;
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int x1 = dstX;
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int y1 = dstY;
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int w1 = dstW;
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int h1 = dstH;
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int x2, y2, w2;
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calcBounds(w0, h0, x1, y1, w1, h1, x2, y2, w2);
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const uint8 *src = getPagePtr(srcPage) + (320 * srcH) + srcW;
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uint8 *dst = getPagePtr(dstPage) + 320 * (y0 + y1);
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for (int y = 0; y < h1; y++) {
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const uint8 *s = src + x2;
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uint8 *d = dst + x0 + x1;
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if (flag)
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d += (h1 >> 1);
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for (int x = 0; x < w1; x++) {
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if (*s)
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*d = *s;
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s++;
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d++;
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}
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dst += 320;
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src += 320;
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}
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}
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bool Screen_v2::calcBounds(int w0, int h0, int &x1, int &y1, int &w1, int &h1, int &x2, int &y2, int &w2) {
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x2 = 0;
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y2 = 0;
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w2 = w1;
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int t = x1 + w1;
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if (t < 1) {
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w1 = h1 = -1;
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} else {
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if (t <= x1) {
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x2 = w1 - t;
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w1 = t;
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x1 = 0;
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}
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t = w0 - x1;
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if (t < 1) {
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w1 = h1 = -1;
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} else {
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if (t <= w1) {
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w1 = t;
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}
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w2 -= w1;
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t = h1 + y1;
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if (t < 1) {
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w1 = h1 = -1;
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} else {
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if (t <= y1) {
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y2 = h1 - t;
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h1 = t;
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y1 = 0;
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}
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t = h0 - y1;
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if (t < 1) {
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w1 = h1 = -1;
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} else {
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if (t <= h1) {
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h1 = t;
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}
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}
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}
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}
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}
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return (w1 == -1) ? false : true;
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}
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} // end of namespace Kyra
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