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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 "engines/util.h"
#include "mads/compression.h"
#include "mads/screen.h"
#include "mads/mads.h"
#include "mads/msurface.h"
#include "mads/resources.h"
#include "mads/sprites.h"
namespace MADS {
MADSEngine *MSurface::_vm = nullptr;
MSurface::MSurface() {
pixels = nullptr;
_freeFlag = false;
}
MSurface::MSurface(int width, int height) {
pixels = nullptr;
_freeFlag = false;
setSize(width, height);
}
MSurface::~MSurface() {
if (_freeFlag)
Graphics::Surface::free();
}
void MSurface::setSize(int width, int height) {
if (_freeFlag)
Graphics::Surface::free();
Graphics::Surface::create(width, height, Graphics::PixelFormat::createFormatCLUT8());
_freeFlag = true;
}
void MSurface::setPixels(byte *pData, int horizSize, int vertSize) {
_freeFlag = false;
pixels = pData;
w = pitch = horizSize;
h = vertSize;
format.bytesPerPixel = 1;
}
int MSurface::scaleValue(int value, int scale, int err) {
int scaled = 0;
while (value--) {
err -= scale;
while (err < 0) {
scaled++;
err += 100;
}
}
return scaled;
}
void MSurface::drawSprite(const Common::Point &pt, SpriteInfo &info, const Common::Rect &clipRect) {
enum {
kStatusSkip,
kStatusScale,
kStatusDraw
};
// NOTE: The current clipping code assumes that the top left corner of the clip
// rectangle is always 0, 0
assert(clipRect.top == 0 && clipRect.left == 0);
// TODO: Put err* and scaled* into SpriteInfo
int errX = info.hotX * info.scaleX % 100;
int errY = info.hotY * info.scaleY % 100;
int scaledWidth = scaleValue(info.width, info.scaleX, errX);
int scaledHeight = scaleValue(info.height, info.scaleY, errY);
int x = pt.x, y = pt.y;
int clipX = 0, clipY = 0;
// Clip the sprite's width and height according to the clip rectangle's dimensions
// This clips the sprite to the bottom and right
if (x >= 0) {
scaledWidth = MIN<int>(x + scaledWidth, clipRect.right) - x;
} else {
clipX = x;
scaledWidth = x + scaledWidth;
}
if (y >= 0) {
scaledHeight = MIN<int>(y + scaledHeight, clipRect.bottom) - y;
} else {
clipY = y;
scaledHeight = y + scaledHeight;
}
// Check if sprite is inside the screen. If it's not, there's no need to draw it
if (scaledWidth + x <= 0 || scaledHeight + y <= 0) // check left and top (in case x,y are negative)
return;
if (scaledWidth <= 0 || scaledHeight <= 0) // check right and bottom
return;
int heightAmt = scaledHeight;
byte *src = info.sprite->getData();
byte *dst = getBasePtr(x - info.hotX - clipX, y - info.hotY - clipY);
int status = kStatusSkip;
byte *scaledLineBuf = new byte[scaledWidth];
while (heightAmt > 0) {
if (status == kStatusSkip) {
// Skip line
errY -= info.scaleY;
if (errY < 0)
status = kStatusScale;
else
src += info.width;
} else {
if (status == kStatusScale) {
// Scale current line
byte *lineDst = scaledLineBuf;
int curErrX = errX;
int width = scaledWidth;
byte *tempSrc = src;
int startX = clipX;
while (width > 0) {
byte pixel = *tempSrc++;
curErrX -= info.scaleX;
while (curErrX < 0) {
if (startX == 0) {
*lineDst++ = pixel;
width--;
} else {
startX++;
}
curErrX += 100;
}
}
src += info.width;
status = kStatusDraw;
}
if (status == kStatusDraw && clipY == 0) {
// Draw previously scaled line
// TODO Implement different drawing types (depth, shadow etc.)
byte *tempDst = dst;
for (int lineX = 0; lineX < scaledWidth; lineX++) {
byte pixel = scaledLineBuf[lineX];
if (info.encoding & 0x80) {
if (pixel == 0x80) {
pixel = 0;
} else {
byte destPixel = *tempDst;
byte r, g, b;
r = CLIP((info.palette[destPixel * 3] * pixel) >> 10, 0, 31);
g = CLIP((info.palette[destPixel * 3 + 1] * pixel) >> 10, 0, 31);
b = CLIP((info.palette[destPixel * 3 + 2] * pixel) >> 10, 0, 31);
pixel = info.inverseColorTable[(b << 10) | (g << 5) | r];
}
}
if (pixel)
*tempDst = pixel;
tempDst++;
}
dst += pitch;
heightAmt--;
// TODO depth etc.
//depthAddress += Destination -> Width;
errY += 100;
if (errY >= 0)
status = kStatusSkip;
} else if (status == kStatusDraw && clipY < 0) {
clipY++;
errY += 100;
if (errY >= 0)
status = kStatusSkip;
}
}
}
delete[] scaledLineBuf;
}
void MSurface::empty() {
Common::fill(getBasePtr(0, 0), getBasePtr(0, h), 0);
}
void MSurface::copyFrom(MSurface *src, const Common::Rect &srcBounds,
const Common::Point &destPos, int transparentColor) {
// Validation of the rectangle and position
int destX = destPos.x, destY = destPos.y;
if ((destX >= w) || (destY >= h))
return;
Common::Rect copyRect = srcBounds;
if (destX < 0) {
copyRect.left += -destX;
destX = 0;
} else if (destX + copyRect.width() > w) {
copyRect.right -= destX + copyRect.width() - w;
}
if (destY < 0) {
copyRect.top += -destY;
destY = 0;
} else if (destY + copyRect.height() > h) {
copyRect.bottom -= destY + copyRect.height() - h;
}
if (!copyRect.isValidRect())
return;
// Copy the specified area
byte *data = src->getData();
byte *srcPtr = data + (src->getWidth() * copyRect.top + copyRect.left);
byte *destPtr = (byte *)pixels + (destY * getWidth()) + destX;
for (int rowCtr = 0; rowCtr < copyRect.height(); ++rowCtr) {
if (transparentColor == -1) {
// No transparency, so copy line over
Common::copy(srcPtr, srcPtr + copyRect.width(), destPtr);
} else {
// Copy each byte one at a time checking for the transparency color
for (int xCtr = 0; xCtr < copyRect.width(); ++xCtr)
if (srcPtr[xCtr] != transparentColor) destPtr[xCtr] = srcPtr[xCtr];
}
srcPtr += src->getWidth();
destPtr += getWidth();
}
}
void MSurface::copyFrom(MSurface *src, const Common::Point &destPos, int depth,
DepthSurface *depthSurface, int scale, int transparentColor) {
int destX = destPos.x, destY = destPos.y;
if (scale == 100) {
// Copy the specified area
Common::Rect copyRect(0, 0, src->getWidth(), src->getHeight());
if (destX < 0) {
copyRect.left += -destX;
destX = 0;
}
else if (destX + copyRect.width() > w) {
copyRect.right -= destX + copyRect.width() - w;
}
if (destY < 0) {
copyRect.top += -destY;
destY = 0;
}
else if (destY + copyRect.height() > h) {
copyRect.bottom -= destY + copyRect.height() - h;
}
if (!copyRect.isValidRect())
return;
byte *data = src->getData();
byte *srcPtr = data + (src->getWidth() * copyRect.top + copyRect.left);
byte *destPtr = (byte *)pixels + (destY * pitch) + destX;
// 100% scaling variation
for (int rowCtr = 0; rowCtr < copyRect.height(); ++rowCtr) {
// Copy each byte one at a time checking against the depth
for (int xCtr = 0; xCtr < copyRect.width(); ++xCtr) {
int pixelDepth = depthSurface == nullptr ? 15 :
depthSurface->getDepth(Common::Point(destX + xCtr, destY + rowCtr));
if ((depth <= pixelDepth) && (srcPtr[xCtr] != transparentColor))
destPtr[xCtr] = srcPtr[xCtr];
}
srcPtr += src->getWidth();
destPtr += getWidth();
}
return;
}
// Start of draw logic for scaled sprites
const byte *srcPixelsP = src->getData();
int destRight = this->getWidth() - 1;
int destBottom = this->getHeight() - 1;
bool normalFrame = true;
int frameWidth = src->getWidth();
int frameHeight = src->getHeight();
int highestDim = MAX(frameWidth, frameHeight);
bool lineDist[MADS_SCREEN_WIDTH];
int distIndex = 0;
int distXCount = 0, distYCount = 0;
int distCtr = 0;
do {
distCtr += scale;
if (distCtr < 100) {
lineDist[distIndex] = false;
} else {
lineDist[distIndex] = true;
distCtr -= 100;
if (distIndex < frameWidth)
++distXCount;
if (distIndex < frameHeight)
++distYCount;
}
} while (++distIndex < highestDim);
destX -= distXCount / 2;
destY -= distYCount - 1;
// Check x bounding area
int spriteLeft = 0;
int spriteWidth = distXCount;
int widthAmount = destX + distXCount - 1;
if (destX < 0) {
spriteWidth += destX;
spriteLeft -= destX;
}
widthAmount -= destRight;
if (widthAmount > 0)
spriteWidth -= widthAmount;
int spriteRight = spriteLeft + spriteWidth;
if (spriteWidth <= 0)
return;
if (!normalFrame) {
destX += distXCount - 1;
spriteLeft = -(distXCount - spriteRight);
spriteRight = (-spriteLeft + spriteWidth);
}
// Check y bounding area
int spriteTop = 0;
int spriteHeight = distYCount;
int heightAmount = destY + distYCount - 1;
if (destY < 0) {
spriteHeight += destY;
spriteTop -= destY;
}
heightAmount -= destBottom;
if (heightAmount > 0)
spriteHeight -= heightAmount;
int spriteBottom = spriteTop + spriteHeight;
if (spriteHeight <= 0)
return;
byte *destPixelsP = this->getBasePtr(destX + spriteLeft, destY + spriteTop);
spriteLeft = (spriteLeft * (normalFrame ? 1 : -1));
// Loop through the lines of the sprite
for (int yp = 0, sprY = -1; yp < frameHeight; ++yp, srcPixelsP += src->pitch) {
if (!lineDist[yp])
// Not a display line, so skip it
continue;
// Check whether the sprite line is in the display range
++sprY;
if ((sprY >= spriteBottom) || (sprY < spriteTop))
continue;
// Found a line to display. Loop through the pixels
const byte *srcP = srcPixelsP;
byte *destP = destPixelsP;
for (int xp = 0, sprX = 0; xp < frameWidth; ++xp, ++srcP) {
if (xp < spriteLeft)
// Not yet reached start of display area
continue;
if (!lineDist[sprX++])
// Not a display pixel
continue;
// Get depth of current output pixel in depth surface
Common::Point pt((destP - (byte *)this->pixels) % this->pitch,
(destP - (byte *)this->pixels) / this->pitch);
int pixelDepth = (depthSurface == nullptr) ? 15 : depthSurface->getDepth(pt);
if ((*srcP != transparentColor) && (depth <= pixelDepth))
*destP = *srcP;
++destP;
}
// Move to the next destination line
destPixelsP += this->pitch;
}
}
void MSurface::scrollX(int xAmount) {
if (xAmount == 0)
return;
byte buffer[80];
int direction = (xAmount > 0) ? -1 : 1;
int xSize = ABS(xAmount);
assert(xSize <= 80);
byte *srcP = getBasePtr(0, 0);
for (int y = 0; y < this->h; ++y, srcP += pitch) {
if (direction < 0) {
// Copy area to be overwritten
Common::copy(srcP, srcP + xSize, &buffer[0]);
// Shift the remainder of the line over the given area
Common::copy(srcP + xSize, srcP + this->w, srcP);
// Move buffered area to the end of the line
Common::copy(&buffer[0], &buffer[xSize], srcP + this->w - xSize);
} else {
// Copy area to be overwritten
Common::copy_backward(srcP + this->w - xSize, srcP + this->w, &buffer[80]);
// Shift the remainder of the line over the given area
Common::copy_backward(srcP, srcP + this->w - xSize, srcP + this->w);
// Move buffered area to the start of the line
Common::copy_backward(&buffer[80 - xSize], &buffer[80], srcP + xSize);
}
}
}
void MSurface::scrollY(int yAmount) {
if (yAmount == 0)
return;
int direction = (yAmount > 0) ? 1 : -1;
int ySize = ABS(yAmount);
assert(ySize < (this->h / 2));
assert(this->w == pitch);
int blockSize = ySize * this->w;
byte *tempData = new byte[blockSize];
byte *pixelsP = getBasePtr(0, 0);
if (direction > 0) {
// Buffer the lines to be overwritten
byte *srcP = (byte *)getBasePtr(0, this->h - ySize);
Common::copy(srcP, srcP + (pitch * ySize), tempData);
// Vertically shift all the lines
Common::copy_backward(pixelsP, pixelsP + (pitch * (this->h - ySize)),
pixelsP + (pitch * this->h));
// Transfer the buffered lines top the top of the screen
Common::copy(tempData, tempData + blockSize, pixelsP);
} else {
// Buffer the lines to be overwritten
Common::copy(pixelsP, pixelsP + (pitch * ySize), tempData);
// Vertically shift all the lines
Common::copy(pixelsP + (pitch * ySize), pixelsP + (pitch * this->h), pixelsP);
// Transfer the buffered lines to the bottom of the screen
Common::copy(tempData, tempData + blockSize, pixelsP + (pitch * (this->h - ySize)));
}
delete[] tempData;
}
void MSurface::translate(Common::Array<RGB6> &palette) {
for (int y = 0; y < this->h; ++y) {
byte *pDest = getBasePtr(0, y);
for (int x = 0; x < this->w; ++x, ++pDest) {
if (*pDest < 255) // scene 752 has some palette indices of 255
*pDest = palette[*pDest]._palIndex;
}
}
}
void MSurface::translate(byte map[PALETTE_COUNT]) {
for (int y = 0; y < this->h; ++y) {
byte *pDest = getBasePtr(0, y);
for (int x = 0; x < this->w; ++x, ++pDest) {
*pDest = map[*pDest];
}
}
}
MSurface *MSurface::flipHorizontal() const {
MSurface *dest = new MSurface(this->w, this->h);
for (int y = 0; y < this->h; ++y) {
const byte *srcP = getBasePtr(this->w - 1, y);
byte *destP = dest->getBasePtr(0, y);
for (int x = 0; x < this->w; ++x)
*destP++ = *srcP--;
}
return dest;
}
/*------------------------------------------------------------------------*/
int DepthSurface::getDepth(const Common::Point &pt) {
if (_vm->_game->_scene._sceneInfo->_depthStyle == 2) {
int bits = (3 - (pt.x % 4)) * 2;
byte v = *getBasePtr(pt.x >> 2, pt.y);
return v >> bits;
} else {
if (pt.x < 0 || pt.y < 0 || pt.x >= this->w || pt.y >= this->h)
return 0;
return *getBasePtr(pt.x, pt.y) & 0xF;
}
}
int DepthSurface::getDepthHighBit(const Common::Point &pt) {
if (_vm->_game->_scene._sceneInfo->_depthStyle == 2) {
int bits = (3 - (pt.x % 4)) * 2;
byte v = *getBasePtr(pt.x >> 2, pt.y);
return (v >> bits) & 2;
} else {
if (pt.x < 0 || pt.y < 0 || pt.x >= this->w || pt.y >= this->h)
return 0;
return *getBasePtr(pt.x, pt.y) & 0x80;
}
}
} // End of namespace MADS
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