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-rw-r--r--engines/prince/graphics.cpp474
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diff --git a/engines/prince/graphics.cpp b/engines/prince/graphics.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 "prince/graphics.h"
+#include "prince/prince.h"
+#include "prince/mhwanh.h"
+
+#include "graphics/palette.h"
+
+#include "common/memstream.h"
+
+namespace Prince {
+
+GraphicsMan::GraphicsMan(PrinceEngine *vm) : _vm(vm), _changed(false) {
+ initGraphics(640, 480, true);
+
+ _frontScreen = new Graphics::Surface();
+ _frontScreen->create(640, 480, Graphics::PixelFormat::createFormatCLUT8());
+
+ _screenForInventory = new Graphics::Surface();
+ _screenForInventory->create(640, 480, Graphics::PixelFormat::createFormatCLUT8());
+
+ _mapScreen = new Graphics::Surface();
+ _mapScreen->create(640, 480, Graphics::PixelFormat::createFormatCLUT8());
+
+ _shadowTable70 = (byte *)malloc(256);
+ _shadowTable50 = (byte *)malloc(256);
+}
+
+GraphicsMan::~GraphicsMan() {
+ _frontScreen->free();
+ delete _frontScreen;
+
+ _screenForInventory->free();
+ delete _screenForInventory;
+
+ _mapScreen->free();
+ delete _mapScreen;
+
+ free(_shadowTable70);
+ free(_shadowTable50);
+}
+
+void GraphicsMan::update(Graphics::Surface *screen) {
+ if (_changed) {
+ _vm->_system->copyRectToScreen((byte *)screen->getBasePtr(0, 0), 640, 0, 0, 640, 480);
+
+ _vm->_system->updateScreen();
+ _changed = false;
+ }
+}
+
+void GraphicsMan::setPalette(const byte *palette) {
+ _vm->_system->getPaletteManager()->setPalette(palette, 0, 256);
+}
+
+void GraphicsMan::change() {
+ _changed = true;
+}
+
+void GraphicsMan::draw(Graphics::Surface *screen, const Graphics::Surface *s) {
+ uint16 w = MIN(screen->w, s->w);
+ const byte *src = (const byte *)s->getBasePtr(0, 0);
+ byte *dst = (byte *)screen->getBasePtr(0, 0);
+ for (uint y = 0; y < s->h; y++) {
+ if (y < screen->h) {
+ memcpy(dst, src, w);
+ }
+ src += s->pitch;
+ dst += screen->pitch;
+ }
+ change();
+}
+
+// Black (value = 0) as a primary transparent color, fix for FLC animations
+void GraphicsMan::drawTransparentSurface(Graphics::Surface *screen, int32 posX, int32 posY, const Graphics::Surface *s, int secondTransColor) {
+ const byte *src1 = (const byte *)s->getBasePtr(0, 0);
+ byte *dst1 = (byte *)screen->getBasePtr(posX, posY);
+ for (int y = 0; y < s->h; y++) {
+ if (y + posY < screen->h && y + posY >= 0) {
+ const byte *src2 = src1;
+ byte *dst2 = dst1;
+ for (int x = 0; x < s->w; x++, src2++, dst2++) {
+ if (*src2 && *src2 != secondTransColor) {
+ if (x + posX < screen->w && x + posX >= 0) {
+ *dst2 = *src2;
+ }
+ }
+ }
+ }
+ src1 += s->pitch;
+ dst1 += screen->pitch;
+ }
+ change();
+}
+
+/**
+ * Similar to drawTransparentSurface but with use of shadowTable for color recalculation
+ * and kShadowColor (191) as a transparent color.
+ */
+void GraphicsMan::drawAsShadowSurface(Graphics::Surface *screen, int32 posX, int32 posY, const Graphics::Surface *s, byte *shadowTable) {
+ const byte *src1 = (const byte *)s->getBasePtr(0, 0);
+ byte *dst1 = (byte *)screen->getBasePtr(posX, posY);
+ for (int y = 0; y < s->h; y++) {
+ if (y + posY < screen->h && y + posY >= 0) {
+ const byte *src2 = src1;
+ byte *dst2 = dst1;
+ for (int x = 0; x < s->w; x++, src2++, dst2++) {
+ if (*src2 == kShadowColor) {
+ if (x + posX < screen->w && x + posX >= 0) {
+ *dst2 = *(shadowTable + *dst2);
+ }
+ }
+ }
+ }
+ src1 += s->pitch;
+ dst1 += screen->pitch;
+ }
+}
+
+/**
+ * Used in glowing animation for inventory items. Creates special blendTable array of colors,
+ * use black (0) as a transparent color.
+ */
+void GraphicsMan::drawTransparentWithBlendSurface(Graphics::Surface *screen, int32 posX, int32 posY, const Graphics::Surface *s) {
+ const byte *src1 = (const byte *)s->getBasePtr(0, 0);
+ byte *dst1 = (byte *)screen->getBasePtr(posX, posY);
+ byte *blendTable = (byte *)malloc(256);
+ for (int i = 0; i < 256; i++) {
+ blendTable[i] = 255;
+ }
+ for (int y = 0; y < s->h; y++) {
+ if (y + posY < screen->h && y + posY >= 0) {
+ const byte *src2 = src1;
+ byte *dst2 = dst1;
+ for (int x = 0; x < s->w; x++, src2++, dst2++) {
+ if (*src2) {
+ if (x + posX < screen->w && x + posX >= 0) {
+ *dst2 = getBlendTableColor(*src2, *dst2, blendTable);
+ }
+ }
+ }
+ }
+ src1 += s->pitch;
+ dst1 += screen->pitch;
+ }
+ free(blendTable);
+ change();
+}
+
+/**
+ * Similar to drawTransparentSurface but with with use of DrawNode as argument for Z axis sorting
+ * and white (255) as transparent color.
+ */
+void GraphicsMan::drawTransparentDrawNode(Graphics::Surface *screen, DrawNode *drawNode) {
+ byte *src1 = (byte *)drawNode->s->getBasePtr(0, 0);
+ byte *dst1 = (byte *)screen->getBasePtr(drawNode->posX, drawNode->posY);
+ for (int y = 0; y < drawNode->s->h; y++) {
+ if (y + drawNode->posY < screen->h && y + drawNode->posY >= 0) {
+ byte *src2 = src1;
+ byte *dst2 = dst1;
+ for (int x = 0; x < drawNode->s->w; x++, src2++, dst2++) {
+ if (*src2 != 255) {
+ if (x + drawNode->posX < screen->w && x + drawNode->posX >= 0) {
+ *dst2 = *src2;
+ }
+ }
+ }
+ }
+ src1 += drawNode->s->pitch;
+ dst1 += screen->pitch;
+ }
+}
+
+/**
+ * Similar to drawTransparentDrawNode but with additional anti-aliasing code for sprite drawing.
+ * Edge smoothing is based on 256 x 256 table of colors transition.
+ * Algorithm is checking if currently drawing pixel is located next to the edge of sprite and if it makes jagged line.
+ * If it does then this pixel is set with color from transition table calculated of original background pixel color
+ * and sprite's edge pixel color.
+ */
+void GraphicsMan::drawTransparentWithTransDrawNode(Graphics::Surface *screen, DrawNode *drawNode) {
+ // pos of first pixel for each row of source sprite
+ byte *src1 = (byte *)drawNode->s->getBasePtr(0, 0);
+ // pos of drawing first pixel for each row on screen surface
+ byte *dst1 = (byte *)screen->getBasePtr(drawNode->posX, drawNode->posY);
+ // trasition table for calculating new color value
+ byte *transTableData = (byte *)drawNode->data;
+ for (int y = 0; y < drawNode->s->h; y++) {
+ if (y + drawNode->posY < screen->h && y + drawNode->posY >= 0) {
+ // current pixel in row of source sprite
+ byte *src2 = src1;
+ // current pixel in row of screen surface
+ byte *dst2 = dst1;
+ for (int x = 0; x < drawNode->s->w; x++, src2++, dst2++) {
+ if (x + drawNode->posX < screen->w && x + drawNode->posX >= 0) {
+ if (*src2 != 255) {
+ // if source sprite pixel is not mask color than draw it normally
+ *dst2 = *src2;
+ } else {
+ // check for making jagged line
+ if (x) {
+ // not first pixel in row
+ if (*(src2 - 1) == 255) {
+ // if it has mask color to the left - check right
+ if (x != drawNode->s->w - 1) {
+ // not last pixel in row
+ if (*(src2 + 1) == 255) {
+ // pixel to the right with mask color - no anti-alias
+ continue;
+ }
+ // it's not mask color to the right - we continue checking
+ } else {
+ // last pixel in row, no right check - no anti-alias
+ continue;
+ }
+ }
+ // it's not mask color to the left - we continue checking
+ } else if (x != drawNode->s->w - 1) {
+ // first pixel in row but not last - just right pixel checking
+ if (*(src2 + 1) == 255) {
+ // pixel to the right with mask color - no anti-alias
+ continue;
+ }
+ // it's not mask color to the right - we continue checking
+ } else {
+ // it's first and last pixel in row at the same time (width = 1) - no anti-alias
+ continue;
+ }
+ byte value = 0;
+ if (y != drawNode->s->h - 1) {
+ // not last row
+ // check pixel below of current src2 pixel
+ value = *(src2 + drawNode->s->pitch);
+ if (value == 255) {
+ // pixel below with mask color - check above
+ if (y) {
+ // not first row
+ value = *(src2 - drawNode->s->pitch);
+ if (value == 255) {
+ // pixel above with mask color - no anti-alias
+ continue;
+ }
+ // it's not mask color above - we draw as transition color
+ } else {
+ // first row - no anti-alias
+ continue;
+ }
+ }
+ // it's not mask color below - we draw as transition color
+ } else if (y) {
+ // last row - just check above
+ value = *(src2 - drawNode->s->pitch);
+ if (value == 255) {
+ // pixel above with mask color - no anti-alias
+ continue;
+ }
+ // it's not mask color above - we draw as transition color
+ } else {
+ // first and last row at the same time (height = 1) - no anti-alias
+ continue;
+ }
+ // new color value based on orginal screen surface color and sprite's edge pixel color
+ *dst2 = transTableData[*dst2 * 256 + value];
+ }
+ }
+ }
+ }
+ // adding pitch to jump to next row of pixels
+ src1 += drawNode->s->pitch;
+ dst1 += screen->pitch;
+ }
+}
+
+void GraphicsMan::drawMaskDrawNode(Graphics::Surface *screen, DrawNode *drawNode) {
+ byte *maskData = (byte *)drawNode->data;
+ byte *src1 = (byte *)drawNode->originalRoomSurface->getBasePtr(drawNode->posX, drawNode->posY);
+ byte *dst1 = (byte *)screen->getBasePtr(drawNode->posX, drawNode->posY);
+ int maskWidth = drawNode->width >> 3;
+ int maskPostion = 0;
+ int maskCounter = 128;
+ for (int y = 0; y < drawNode->height; y++) {
+ if (y + drawNode->posY < screen->h && y + drawNode->posY >= 0) {
+ byte *src2 = src1;
+ byte *dst2 = dst1;
+ int tempMaskPostion = maskPostion;
+ for (int x = 0; x < drawNode->width; x++, src2++, dst2++) {
+ if (x + drawNode->posX < screen->w && x + drawNode->posX >= 0) {
+ if ((maskData[tempMaskPostion] & maskCounter) != 0) {
+ *dst2 = *src2;
+ }
+ }
+ maskCounter >>= 1;
+ if (maskCounter == 0) {
+ maskCounter = 128;
+ tempMaskPostion++;
+ }
+ }
+ }
+ src1 += drawNode->originalRoomSurface->pitch;
+ dst1 += screen->pitch;
+ maskPostion += maskWidth;
+ maskCounter = 128;
+ }
+}
+
+void GraphicsMan::drawAsShadowDrawNode(Graphics::Surface *screen, DrawNode *drawNode) {
+ byte *shadowData = (byte *)drawNode->data;
+ byte *src1 = (byte *)drawNode->s->getBasePtr(0, 0);
+ byte *dst1 = (byte *)screen->getBasePtr(drawNode->posX, drawNode->posY);
+ for (int y = 0; y < drawNode->s->h; y++) {
+ if (y + drawNode->posY < screen->h && y + drawNode->posY >= 0) {
+ byte *src2 = src1;
+ byte *dst2 = dst1;
+ for (int x = 0; x < drawNode->s->w; x++, src2++, dst2++) {
+ if (*src2 == kShadowColor) {
+ if (x + drawNode->posX < screen->w && x + drawNode->posX >= 0) {
+ *dst2 = *(shadowData + *dst2);
+ }
+ }
+ }
+ }
+ src1 += drawNode->s->pitch;
+ dst1 += screen->pitch;
+ }
+}
+
+void GraphicsMan::drawBackSpriteDrawNode(Graphics::Surface *screen, DrawNode *drawNode) {
+ byte *src1 = (byte *)drawNode->s->getBasePtr(0, 0);
+ byte *dst1 = (byte *)screen->getBasePtr(drawNode->posX, drawNode->posY);
+ for (int y = 0; y < drawNode->s->h; y++) {
+ if (y + drawNode->posY < screen->h && y + drawNode->posY >= 0) {
+ byte *src2 = src1;
+ byte *dst2 = dst1;
+ for (int x = 0; x < drawNode->s->w; x++, src2++, dst2++) {
+ if (*src2 != 255) {
+ if (x + drawNode->posX < screen->w && x + drawNode->posX >= 0) {
+ if (*dst2 == 255) {
+ *dst2 = *src2;
+ }
+ }
+ }
+ }
+ }
+ src1 += drawNode->s->pitch;
+ dst1 += screen->pitch;
+ }
+}
+
+byte GraphicsMan::getBlendTableColor(byte pixelColor, byte backgroundPixelColor, byte *blendTable) {
+ int currColor = 0;
+
+ if (blendTable[pixelColor] != 255) {
+ currColor = blendTable[pixelColor];
+ } else {
+ const byte *originalPalette = _vm->_roomBmp->getPalette();
+
+ int redFirstOrg = originalPalette[pixelColor * 3] * _vm->_mst_shadow / 256;
+ CLIP(redFirstOrg, 0, 255);
+ if (_vm->_mst_shadow <= 256) {
+ int redFirstBack = originalPalette[backgroundPixelColor * 3] * (256 - _vm->_mst_shadow) / 256;
+ CLIP(redFirstBack, 0, 255);
+ redFirstOrg += redFirstBack;
+ CLIP(redFirstOrg, 0, 255);
+ }
+
+ int greenFirstOrg = originalPalette[pixelColor * 3 + 1] * _vm->_mst_shadow / 256;
+ CLIP(greenFirstOrg, 0, 255);
+ if (_vm->_mst_shadow <= 256) {
+ int greenFirstBack = originalPalette[backgroundPixelColor * 3 + 1] * (256 - _vm->_mst_shadow) / 256;
+ CLIP(greenFirstBack, 0, 255);
+ greenFirstOrg += greenFirstBack;
+ CLIP(greenFirstOrg, 0, 255);
+ }
+
+ int blueFirstOrg = originalPalette[pixelColor * 3 + 2] * _vm->_mst_shadow / 256;
+ CLIP(blueFirstOrg, 0, 255);
+ if (_vm->_mst_shadow <= 256) {
+ int blueFirstBack = originalPalette[backgroundPixelColor * 3 + 2] * (256 - _vm->_mst_shadow) / 256;
+ CLIP(blueFirstBack, 0, 255);
+ blueFirstOrg += blueFirstBack;
+ CLIP(blueFirstOrg, 0, 255);
+ }
+
+ int bigValue = PrinceEngine::kIntMax; // infinity
+ for (int j = 0; j < 256; j++) {
+ int redSecondOrg = originalPalette[3 * j];
+ int redNew = redFirstOrg - redSecondOrg;
+ redNew = redNew * redNew;
+
+ int greenSecondOrg = originalPalette[3 * j + 1];
+ int greenNew = greenFirstOrg - greenSecondOrg;
+ greenNew = greenNew * greenNew;
+
+ int blueSecondOrg = originalPalette[3 * j + 2];
+ int blueNew = blueFirstOrg - blueSecondOrg;
+ blueNew = blueNew * blueNew;
+
+ int sumOfColorValues = redNew + greenNew + blueNew;
+
+ if (sumOfColorValues < bigValue) {
+ bigValue = sumOfColorValues;
+ currColor = j;
+ }
+
+ if (sumOfColorValues == 0) {
+ break;
+ }
+ }
+ blendTable[pixelColor] = currColor;
+ }
+ return currColor;
+}
+
+void GraphicsMan::makeShadowTable(int brightness, byte *shadowPalette) {
+ int shadow = brightness * 256 / 100;
+ const byte *originalPalette = _vm->_roomBmp->getPalette();
+
+ for (int i = 0; i < 256; i++) {
+ int redFirstOrg = originalPalette[3 * i] * shadow / 256;
+ int greenFirstOrg = originalPalette[3 * i + 1] * shadow / 256;
+ int blueFirstOrg = originalPalette[3 * i + 2] * shadow / 256;
+
+ int currColor = 0;
+ int bigValue = 999999999; // infinity
+
+ for (int j = 0; j < 256; j++) {
+ int redSecondOrg = originalPalette[3 * j];
+ int redNew = redFirstOrg - redSecondOrg;
+ redNew = redNew * redNew;
+
+ int greenSecondOrg = originalPalette[3 * j + 1];
+ int greenNew = greenFirstOrg - greenSecondOrg;
+ greenNew = greenNew * greenNew;
+
+ int blueSecondOrg = originalPalette[3 * j + 2];
+ int blueNew = blueFirstOrg - blueSecondOrg;
+ blueNew = blueNew * blueNew;
+
+ int sumOfColorValues = redNew + greenNew + blueNew;
+
+ if (sumOfColorValues < bigValue) {
+ bigValue = sumOfColorValues;
+ currColor = j;
+ }
+
+ if (sumOfColorValues == 0) {
+ break;
+ }
+ }
+ shadowPalette[i] = currColor;
+ }
+}
+
+} // End of namespace Prince
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