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blockimages.cpp
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// Copyright 2010-2012 Michael J. Nelson
//
// This file is part of pigmap.
//
// pigmap 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 3 of the License, or
// (at your option) any later version.
//
// pigmap 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 pigmap. If not, see <http://www.gnu.org/licenses/>.
#include <iostream>
#include <fstream>
#include <sstream>
#include <algorithm>
#include <unordered_map>
#include "blockimages.h"
#include "utils.h"
using namespace std;
// in this file, confusingly, "tile" refers to the texture/image tile, not to the map tiles
// also, this is a nasty mess in here; apologies to anyone reading this
void writeBlockImagesVersion(int B, const string& imgpath, int32_t version)
{
string versionfile = imgpath + "/blocks-" + tostring(B) + ".version";
ofstream outfile(versionfile.c_str());
outfile << version;
}
// get the version number associated with blocks-B.png; this is stored
// in blocks-B.version, which is just a single string with the version number
int getBlockImagesVersion(int B, const string& imgpath)
{
string versionfile = imgpath + "/blocks-" + tostring(B) + ".version";
ifstream infile(versionfile.c_str());
// if there's no version file, assume the version is 0, so new version file
// will be generated according to the descriptor file version
if (infile.fail())
{
infile.close();
writeBlockImagesVersion(B, imgpath, 0);
return 0;
}
// otherwise, read the version
int32_t v;
infile >> v;
// if the version is clearly insane, ignore it
if (v < 0 || v > 10000)
v = 0;
return v;
}
bool BlockImages::create(int B, const string& imgpath)
{
rectsize = 4*B;
// 1.5
// Block mapping is specified in a separate list, pointing to textures listed in another file
string blocktexturesfile = imgpath + "/blocktextures.list";
string blockdescriptorfile = imgpath + "/blockdescriptor.list";
ifstream texturelist(blocktexturesfile.c_str());
ifstream descriptorlist(blockdescriptorfile.c_str());
if(descriptorlist.fail())
{
descriptorlist.close();
cerr << blockdescriptorfile << " is missing" << endl;
return false;
}
setBlockDescriptors(descriptorlist);
blockversion = setOffsets();
// first, see if blocks-B.png exists, and what its version is
int biversion = getBlockImagesVersion(B, imgpath);
string blocksfile = imgpath + "/blocks-" + tostring(B) + ".png";
if (img.readPNG(blocksfile))
{
// if it's the correct size and version, we're okay
int w = rectsize*16, h = (blockversion/16 + 1) * rectsize;
if (img.w == w && img.h == h && biversion == blockversion)
{
retouchAlphas(B);
checkOpacityAndTransparency(B);
return true;
}
// if it's a previous version, we will need to build a new one, in case descriptor order
// has been changed
if (biversion < blockversion && img.w == w && img.h == (biversion/16 + 1) * rectsize)
{
cerr << blocksfile << " is of and older version (" << biversion << ")" << endl;
cerr << "...new block file will be built (" << blockversion << ")" << endl;
}
// otherwise, the file's been trashed somehow; rebuild it
else
{
cerr << blocksfile << " has incorrect size (expected " << w << "x" << h << ")" << endl;
cerr << "...will try to create new block file" << blocksfile << endl;
}
}
else
cerr << blocksfile << " not found (or failed to read as PNG); will try to build from provided textures" << endl;
// build blocks-B.png from list of textures in texture list file
if(texturelist.fail())
{
texturelist.close();
cerr << blocktexturesfile << " is missing" << endl;
return false;
}
else if (!construct(B, texturelist, descriptorlist, imgpath))
{
cerr << "image path is missing at least one of the required files" << endl;
cerr << "from minecraft.jar or your tile pack." << endl;
cerr << "endportal.png -- included with pigmap" << endl;
return false;
}
// write blocks-B.png and blocks-B.version
img.writePNG(blocksfile);
writeBlockImagesVersion(B, imgpath, blockversion);
retouchAlphas(B);
checkOpacityAndTransparency(B);
return true;
}
// take the various textures from chest.png and use them to construct "flat" 14x14 tiles (or whatever
// the multiplied size is, if the textures are larger), then resize those flat images to 2Bx2B
// ...the resulting image will be a 3x1 array of 2Bx2B images: first the top, then the front, then
// the side
int generateChestTiles(unordered_map<std::string, RGBAImage>& blockTextures, const RGBAImage& texture, const string& name, int B)
{
int scale = texture.w / 64;
int chestSize = 14 * scale;
RGBAImage chesttiles;
chesttiles.create(chestSize*3, chestSize);
// top texture just gets copied straight over
blit(texture, ImageRect(14*scale, 0, 14*scale, 14*scale), chesttiles, 0, 0);
// front tile gets the front lid texture plus the front bottom texture, then the latch on
// top of that
blit(texture, ImageRect(14*scale, 14*scale, 14*scale, 4*scale), chesttiles, chestSize, 0);
blit(texture, ImageRect(14*scale, 33*scale, 14*scale, 10*scale), chesttiles, chestSize, 4*scale);
blit(texture, ImageRect(scale, scale, 2*scale, 4*scale), chesttiles, chestSize + 6*scale, 2*scale);
// side tile gets the side lid texture plus the side bottom texture
blit(texture, ImageRect(28*scale, 14*scale, 14*scale, 4*scale), chesttiles, chestSize*2, 0);
blit(texture, ImageRect(28*scale, 33*scale, 14*scale, 10*scale), chesttiles, chestSize*2, 4*scale);
int tilesize = 2*B;
for (int x = 0; x < 3; x++)
{
RGBAImage img;
img.create(tilesize, tilesize);
resize(chesttiles, ImageRect(x*chestSize, 0, chestSize, chestSize),
img, ImageRect(0, 0, tilesize, tilesize));
blockTextures["/" + name + "_" + tostring(x)] = img;
}
return 3;
}
// same thing for largechest.png--construct flat tiles, then resize
// ...resulting image is a 7x1 array of 2Bx2B images:
// -left half of top
// -right half of top
// -left half of front
// -right half of front
// -left half of back
// -right half of back
// -side
int generateLargeChestTiles(unordered_map<std::string, RGBAImage>& blockTextures, const RGBAImage& texture, const string& name, int B)
{
int scale = texture.w / 128;
int tilesize = 2*B;
RGBAImage chesttiles;
chesttiles.create(7*tilesize, tilesize);
// top texture gets copied straight over--note that the original texture is 30x14, but
// we're putting it into two squares
resize(texture, ImageRect(14*scale, 0, 30*scale, 14*scale), chesttiles, ImageRect(0, 0, tilesize*2, tilesize));
// front tile gets the front lid texture plus the front bottom texture, then the latch
// on top of that
RGBAImage fronttiles;
fronttiles.create(30*scale, 14*scale);
blit(texture, ImageRect(14*scale, 14*scale, 30*scale, 4*scale), fronttiles, 0, 0);
blit(texture, ImageRect(14*scale, 33*scale, 30*scale, 10*scale), fronttiles, 0, 4*scale);
blit(texture, ImageRect(scale, scale, 2*scale, 4*scale), fronttiles, 14*scale, 2*scale);
// do two resizes, to make sure the special end processing picks up the latch
resize(fronttiles, ImageRect(0, 0, 15*scale, 14*scale), chesttiles, ImageRect(2*tilesize, 0, tilesize, tilesize));
resize(fronttiles, ImageRect(15*scale, 0, 15*scale, 14*scale), chesttiles, ImageRect(3*tilesize, 0, tilesize, tilesize));
// back tile gets the back lid texture plus the back bottom texture
RGBAImage backtiles;
backtiles.create(30*scale, 14*scale);
blit(texture, ImageRect(58*scale, 14*scale, 30*scale, 4*scale), backtiles, 0, 0);
blit(texture, ImageRect(58*scale, 33*scale, 30*scale, 10*scale), backtiles, 0, 4*scale);
resize(backtiles, ImageRect(0, 0, 30*scale, 14*scale), chesttiles, ImageRect(4*tilesize, 0, 2*tilesize, tilesize));
// side tile gets the side lid texture plus the side bottom texture
RGBAImage sidetile;
sidetile.create(14*scale, 14*scale);
blit(texture, ImageRect(44*scale, 14*scale, 14*scale, 4*scale), sidetile, 0, 0);
blit(texture, ImageRect(44*scale, 33*scale, 14*scale, 10*scale), sidetile, 0, 4*scale);
resize(sidetile, ImageRect(0, 0, 14*scale, 14*scale), chesttiles, ImageRect(6*tilesize, 0, tilesize, tilesize));
for (int x = 0; x < 7; x++)
{
RGBAImage img;
img.create(tilesize, tilesize);
blit(chesttiles, ImageRect(x*tilesize, 0, tilesize, tilesize), img, 0, 0);
blockTextures["/" + name + "_" + tostring(x)] = img;
}
return 3;
}
// iterate over the pixels of a 2B-sized texture tile; used for both source rectangles and
// destination parallelograms
struct FaceIterator
{
bool end; // true if we're done
int x, y; // current pixel
int pos;
int size; // number of columns to draw, as well as number of pixels in each
int deltaY; // amount to skew y-coord every 2 columns: -1 or 1 for N/S or W/E facing destinations, 0 for source
FaceIterator(int xstart, int ystart, int dY, int sz)
{
size = sz;
deltaY = dY;
end = false;
x = xstart;
y = ystart;
pos = 0;
}
void advance()
{
pos++;
if (pos >= size*size)
{
end = true;
return;
}
y++;
if (pos % size == 0)
{
x++;
y -= size;
if (pos % (2*size) == size)
y += deltaY;
}
}
};
// like FaceIterator with no deltaY (for source rectangles), but with the source rotated and/or flipped
struct RotatedFaceIterator
{
bool end;
int x, y;
int pos;
int size;
int rot; // 0 = down, then right; 1 = left, then down; 2 = up, then left; 3 = right, then up
bool flipX;
int dx1, dy1, dx2, dy2;
RotatedFaceIterator(int xstart, int ystart, int r, int sz, bool fX)
{
size = sz;
rot = r;
flipX = fX;
end = false;
pos = 0;
if (rot == 0)
{
x = flipX ? (xstart + size - 1) : xstart;
y = ystart;
dx1 = 0;
dy1 = 1;
dx2 = flipX ? -1 : 1;
dy2 = 0;
}
else if (rot == 1)
{
x = flipX ? xstart : (xstart + size - 1);
y = ystart;
dx1 = flipX ? 1 : -1;
dy1 = 0;
dx2 = 0;
dy2 = 1;
}
else if (rot == 2)
{
x = flipX ? xstart : (xstart + size - 1);
y = ystart + size - 1;
dx1 = 0;
dy1 = -1;
dx2 = flipX ? 1 : -1;
dy2 = 0;
}
else
{
x = flipX ? (xstart + size - 1) : xstart;
y = ystart + size - 1;
dx1 = flipX ? -1 : 1;
dy1 = 0;
dx2 = 0;
dy2 = -1;
}
}
void advance()
{
pos++;
if (pos >= size*size)
{
end = true;
return;
}
x += dx1;
y += dy1;
if (pos % size == 0)
{
x += dx2;
y += dy2;
x -= dx1 * size;
y -= dy1 * size;
}
}
};
// iterate over the pixels of the top face of a block
struct TopFaceIterator
{
bool end; // true if we're done
int x, y; // current pixel
int pos;
int size; // number of "columns", and number of pixels in each
TopFaceIterator(int xstart, int ystart, int sz)
{
size = sz;
end = false;
x = xstart;
y = ystart;
pos = 0;
}
void advance()
{
if ((pos/size) % 2 == 0)
{
int m = pos % size;
if (m == size - 1)
{
x += size - 1;
y -= size/2;
}
else if (m == size - 2)
y++;
else if (m % 2 == 0)
{
x--;
y++;
}
else
x--;
}
else
{
int m = pos % size;
if (m == 0)
y++;
else if (m == size - 1)
{
x += size - 1;
y -= size/2 - 1;
}
else if (m % 2 == 0)
{
x--;
y++;
}
else
x--;
}
pos++;
if (pos >= size*size)
end = true;
}
};
struct SourceTile
{
const RGBAImage *image; // or NULL for no tile
int xpos, ypos; // tile offset within the image
int rot;
bool flipX;
SourceTile(const RGBAImage *img, int r, bool f) : image(img), xpos(0), ypos(0), rot(r), flipX(f) {}
SourceTile() : image(NULL), xpos(0), ypos(0), rot(0), flipX(false) {}
bool valid() const {return image != NULL;}
};
// iterate over a square source tile, with possible rotation and flip
struct SourceIterator
{
SourceIterator(const SourceTile& tile, int tilesize)
: image(*(tile.image)), faceit(tile.xpos*tilesize, tile.ypos*tilesize, tile.rot, tilesize, tile.flipX) {}
void advance() {faceit.advance();}
bool end() {return faceit.end;}
RGBAPixel pixel() {return image(faceit.x, faceit.y);}
const RGBAImage& image;
RotatedFaceIterator faceit;
};
// construct a source iterator for a given texture tile with rotation and/or flip
SourceTile blockTile(const RGBAImage& tile, int rot, bool flipX)
{
return SourceTile(&tile, rot, flipX);
}
SourceTile blockTile(const RGBAImage& tile)
{
return blockTile(tile, 0, false);
}
int deinterpolate(int targetj, int srcrange, int destrange)
{
for (int i = 0; i < destrange; i++)
{
int j = interpolate(i, destrange, srcrange);
if (j >= targetj)
return i;
}
return destrange - 1;
}
// draw a normal block image, using three texture tiles (which may be flipped/rotated/missing), and adding a bit of shadow
// to the N and W faces
void drawRotatedBlockImage(RGBAImage& dest, const ImageRect& drect, const SourceTile& Wface, const SourceTile& Sface, const SourceTile& Uface, int B) // re-oriented
{
int tilesize = 2*B;
// N face starts at [0,B]
if (Wface.valid())
{
FaceIterator dstit(drect.x, drect.y + B, 1, tilesize);
for (SourceIterator srcit(Wface, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
dest(dstit.x, dstit.y) = srcit.pixel();
darken(dest(dstit.x, dstit.y), 0.9, 0.9, 0.9);
}
}
// W face starts at [2B,2B]
if (Sface.valid())
{
FaceIterator dstit(drect.x + 2*B, drect.y + 2*B, -1, tilesize);
for (SourceIterator srcit(Sface, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
dest(dstit.x, dstit.y) = srcit.pixel();
darken(dest(dstit.x, dstit.y), 0.8, 0.8, 0.8);
}
}
// U face starts at [2B-1,0]
if (Uface.valid())
{
TopFaceIterator dstit(drect.x + 2*B-1, drect.y, tilesize);
for (SourceIterator srcit(Uface, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
dest(dstit.x, dstit.y) = srcit.pixel();
}
}
}
// overload of drawRotatedBlockImage taking three .png tiles
void drawBlockImage(RGBAImage& dest, const ImageRect& drect, RGBAImage& Wface, RGBAImage& Sface, RGBAImage& Uface, int B) // re-oriented
{
drawRotatedBlockImage(dest, drect, blockTile(Wface), blockTile(Sface), blockTile(Uface), B);
}
// draw a block image where the block isn't full height (half-steps, snow, etc.)
// topcutoff is the number of pixels (out of 2B) to chop off the top of the N and W faces
// bottomcutoff is the number of pixels (out of 2B) to chop off the bottom
// if shift is true, we start copying pixels from the very top of the source tile, even if there's a topcutoff
// U face can also be rotated, and N/W faces can be X-flipped (set 0x1 for N, 0x2 for W)
void drawPartialBlockImage(RGBAImage& dest, const ImageRect& drect, RGBAImage& Wface, RGBAImage& Sface, RGBAImage& Uface, int B, bool W, bool S, bool U, int topcutoff, int bottomcutoff, int rot, int flip, bool shift) // re-oriented
{
int tilesize = 2*B;
if (topcutoff + bottomcutoff >= tilesize)
return;
int end = tilesize - bottomcutoff;
// W face starts at [0,B]
if (W)
{
FaceIterator dstit(drect.x, drect.y + B, 1, tilesize);
for (RotatedFaceIterator srcit(0, 0, 0, tilesize, flip & 0x1); !srcit.end; srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize >= topcutoff && dstit.pos % tilesize < end)
{
dest(dstit.x, dstit.y) = Wface(srcit.x, srcit.y - (shift ? topcutoff : 0));
darken(dest(dstit.x, dstit.y), 0.9, 0.9, 0.9);
}
}
}
// S face starts at [2B,2B]
if (S)
{
FaceIterator dstit(drect.x + 2*B, drect.y + 2*B, -1, tilesize);
for (RotatedFaceIterator srcit(0, 0, 0, tilesize, flip & 0x2); !srcit.end; srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize >= topcutoff && dstit.pos % tilesize < end)
{
dest(dstit.x, dstit.y) = Sface(srcit.x, srcit.y - (shift ? topcutoff : 0));
darken(dest(dstit.x, dstit.y), 0.8, 0.8, 0.8);
}
}
}
// U face starts at [2B-1,topcutoff]
if (U)
{
TopFaceIterator dstit(drect.x + 2*B-1, drect.y + topcutoff, tilesize);
for (RotatedFaceIterator srcit(0, 0, rot, tilesize, false); !srcit.end; srcit.advance(), dstit.advance())
{
dest(dstit.x, dstit.y) = Uface(srcit.x, srcit.y);
}
}
}
// override drawPartialBlockImage without arguments for optional face drawing (draw all faces by default)
void drawPartialBlockImage(RGBAImage& dest, const ImageRect& drect, RGBAImage& Wface, RGBAImage& Sface, RGBAImage& Uface, int B, int topcutoff, int bottomcutoff, int rot, int flip, bool shift)
{
drawPartialBlockImage(dest, drect, Wface, Sface, Uface, B, true, true, true, topcutoff, bottomcutoff, rot, flip, shift);
}
// draw two flat copies of a tile intersecting at the block center (saplings, etc.)
void drawItemBlockImage(RGBAImage& dest, const ImageRect& drect, const SourceTile& tile, bool N, bool S, bool W, bool E, int B) // re-oriented
{
if (!tile.valid())
return;
int tilesize = 2*B;
int cutoff = tilesize/2;
// S face starting at [B,1.5B] -- eastern half only
if (E)
{
FaceIterator dstit(drect.x + B, drect.y + B*3/2, -1, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
if (dstit.pos / tilesize >= cutoff)
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
// W face starting at [B,0.5B]
if (N || S)
{
FaceIterator dstit(drect.x + B, drect.y + B/2, 1, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
if ((S && dstit.pos / tilesize >= cutoff) || (N && dstit.pos / tilesize < cutoff))
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
// S face starting at [B,1.5B] -- western half only
if (W)
{
FaceIterator dstit(drect.x + B, drect.y + B*3/2, -1, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
if (dstit.pos / tilesize < cutoff)
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
}
void drawItemBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int B)
{
drawItemBlockImage(dest, drect, blockTile(tile), true, true, true, true, B);
}
// draw an item block image possibly missing some edges (iron bars, etc.)
void drawPartialItemBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int rot, bool flipX, bool N, bool S, bool W, bool E, int B)
{
drawItemBlockImage(dest, drect, blockTile(tile, rot, flipX), N, S, W, E, B);
}
// draw four flat copies of a tile intersecting in a square (netherwart, etc.)
void drawMultiItemBlockImage(RGBAImage& dest, const ImageRect& drect, const SourceTile& tile, int B)
{
if (!tile.valid())
return;
int tilesize = 2*B;
// E/W face starting at [0.5B,1.25B]
{
FaceIterator dstit(drect.x + B/2, drect.y + B*5/4, -1, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
// E/W face starting at [1.5B,1.75B]
{
FaceIterator dstit(drect.x + 3*B/2, drect.y + B*7/4, -1, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
// N/S face starting at [0.5B,0.75B]
{
FaceIterator dstit(drect.x + B/2, drect.y + B*3/4, 1, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
// N/S face starting at [1.5B,0.25B]
{
FaceIterator dstit(drect.x + 3*B/2, drect.y + B/4, 1, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
}
void drawMultiItemBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int B)
{
drawMultiItemBlockImage(dest, drect, blockTile(tile), B);
}
// draw a tile on a single upright face
// 0 = E, 1 = W, 2 = S, 3 = N
// ...handles transparency
void drawSingleFaceBlockImage(RGBAImage& dest, const ImageRect& drect, const SourceTile& tile, int face, int B) // re-oriented maybe?
{
if (!tile.valid())
return;
int tilesize = 2*B;
int xoff, yoff, deltaY;
if (face == 0)
{
xoff = 2*B;
yoff = 0;
deltaY = 1;
}
else if (face == 1)
{
xoff = 0;
yoff = B;
deltaY = 1;
}
else if (face == 2)
{
xoff = 2*B;
yoff = 2*B;
deltaY = -1;
}
else
{
xoff = 0;
yoff = B;
deltaY = -1;
}
FaceIterator dstit(drect.x + xoff, drect.y + yoff, deltaY, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
void drawSingleFaceBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int face, int B)
{
drawSingleFaceBlockImage(dest, drect, blockTile(tile), face, B);
}
// draw part of a tile on a single upright face
// 0 = S, 1 = N, 2 = W, 3 = E
// ...handles transparency
void drawPartialSingleFaceBlockImage(RGBAImage& dest, const ImageRect& drect, const SourceTile& tile, int face, int B, double croptop, double cropbottom, double cropleft, double cropright)
{
int tilesize = 2*B;
int xoff, yoff, deltaY;
if (face == 0)
{
xoff = 2*B;
yoff = 0;
deltaY = 1;
}
else if (face == 1)
{
xoff = 0;
yoff = B;
deltaY = 1;
}
else if (face == 2)
{
xoff = 2*B;
yoff = 2*B;
deltaY = -1;
}
else
{
xoff = 0;
yoff = B;
deltaY = -1;
}
FaceIterator dstit(drect.x + xoff, drect.y + yoff, deltaY, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize >= croptop && dstit.pos % tilesize < tilesize - cropbottom &&
dstit.pos / tilesize >= cropleft && dstit.pos / tilesize < tilesize - cropright)
blend(dest(dstit.x, dstit.y), srcit.pixel());
}
}
void drawPartialSingleFaceBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int face, int B, int croptop, int cropbottom, int cropleft, int cropright)
{
drawPartialSingleFaceBlockImage(dest, drect, blockTile(tile), face, B, croptop, cropbottom, cropleft, cropright);
}
// draw a single tile on the floor, possibly with rotation
// 0 = top of tile is on E side; 1 = N, 2 = E, 3 = S
void drawFloorBlockImage(RGBAImage& dest, const ImageRect& drect, const SourceTile& tile, int B)
{
int tilesize = 2*B;
TopFaceIterator dstit(drect.x + 2*B-1, drect.y + 2*B, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
dest(dstit.x, dstit.y) = srcit.pixel();
}
}
void drawFloorBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int rot, int B)
{
drawFloorBlockImage(dest, drect, blockTile(tile, rot, false), B);
}
// draw a single tile on the floor, possibly with rotation, angled upwards
// rot: 0 = top of tile is on S side; 1 = W, 2 = N, 3 = E
// up: 0 = S side of tile is highest; 1 = W, 2 = N, 3 = E
void drawAngledFloorBlockImage(RGBAImage& dest, const ImageRect& drect, const SourceTile& tile, int up, int B)
{
int tilesize = 2*B;
TopFaceIterator dstit(drect.x + 2*B-1, drect.y + 2*B, tilesize);
for (SourceIterator srcit(tile, tilesize); !srcit.end(); srcit.advance(), dstit.advance())
{
int yoff = 0;
int row = dstit.pos % tilesize, col = dstit.pos / tilesize;
if (up == 0)
yoff = tilesize - 1 - row;
else if (up == 1)
yoff = col;
else if (up == 2)
yoff = row;
else if (up == 3)
yoff = tilesize - 1 - col;
blend(dest(dstit.x, dstit.y - yoff), srcit.pixel());
blend(dest(dstit.x, dstit.y - yoff + 1), srcit.pixel());
}
}
void drawAngledFloorBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int rot, int up, int B)
{
drawAngledFloorBlockImage(dest, drect, blockTile(tile, rot, false), up, B);
}
// draw a single tile on the ceiling, possibly with rotation
// 0 = top of tile is on S side; 1 = W, 2 = N, 3 = E
void drawCeilBlockImage(RGBAImage& dest, const ImageRect& drect, const RGBAImage& tile, int rot, int B)
{
int tilesize = 2*B;
TopFaceIterator dstit(drect.x + 2*B-1, drect.y, tilesize);
for (RotatedFaceIterator srcit(0, 0, rot, tilesize, false); !srcit.end; srcit.advance(), dstit.advance())
{
dest(dstit.x, dstit.y) = tile(srcit.x, srcit.y);
}
}
// draw a block image that's just a single color (plus shadows)
void drawSolidColorBlockImage(RGBAImage& dest, const ImageRect& drect, RGBAPixel p, int B)
{
int tilesize = 2*B;
// N face starts at [0,B]
for (FaceIterator dstit(drect.x, drect.y + B, 1, tilesize); !dstit.end; dstit.advance())
{
dest(dstit.x, dstit.y) = p;
darken(dest(dstit.x, dstit.y), 0.9, 0.9, 0.9);
}
// W face starts at [2B,2B]
for (FaceIterator dstit(drect.x + 2*B, drect.y + 2*B, -1, tilesize); !dstit.end; dstit.advance())
{
dest(dstit.x, dstit.y) = p;
darken(dest(dstit.x, dstit.y), 0.8, 0.8, 0.8);
}
// U face starts at [2B-1,0]
for (TopFaceIterator dstit(drect.x + 2*B-1, drect.y, tilesize); !dstit.end; dstit.advance())
{
dest(dstit.x, dstit.y) = p;
}
}
// draw E-ascending stairs
void drawStairsE(RGBAImage& dest, const ImageRect& drect, RGBAImage& tileWS, RGBAImage& tileU, int B)
{
int tilesize = 2*B;
// normal W face starts at [0,B]; draw the bottom half of it
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x, drect.y + B, 1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize >= B)
{
dest(dstit.x, dstit.y) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y), 0.9, 0.9, 0.9);
}
}
// normal S face starts at [2B,2B]; draw all but the upper-left quarter of it
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x + 2*B, drect.y + 2*B, -1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize >= B || dstit.pos / tilesize >= B)
{
dest(dstit.x, dstit.y) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y), 0.8, 0.8, 0.8);
}
}
// normal U face starts at [2B-1,0]; draw the top half of it
TopFaceIterator tdstit(drect.x + 2*B-1, drect.y, tilesize);
for (FaceIterator srcit(0, 0, 0, tilesize); !srcit.end; srcit.advance(), tdstit.advance())
{
// if B is odd, we need B pixels from each column, but if it's even, we need to alternate between
// B-1 and B+1
int cutoff = B;
if (B % 2 == 0)
cutoff += ((tdstit.pos / tilesize) % 2 == 0) ? -1 : 1;
if (tdstit.pos % tilesize < cutoff)
{
dest(tdstit.x, tdstit.y) = tileU(srcit.x, srcit.y);
}
}
// draw the top half of another W face at [B,B/2]
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x + B, drect.y + B/2, 1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
// ...but if B is odd, we need to add an extra [0,1] to the even-numbered columns
int adjust = 0;
if (B % 2 == 1 && (dstit.pos / tilesize) % 2 == 0)
adjust = 1;
if (dstit.pos % tilesize < B)
{
dest(dstit.x, dstit.y + adjust) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y + adjust), 0.9, 0.9, 0.9);
}
}
// draw the bottom half of another U face at [2B-1,B]
tdstit = TopFaceIterator(drect.x + 2*B-1, drect.y + B, tilesize);
for (FaceIterator srcit(0, 0, 0, tilesize); !srcit.end; srcit.advance(), tdstit.advance())
{
// again, if B is odd, take B pixels from each column; if even, take B-1 or B+1
int cutoff = B;
if (B % 2 == 0)
cutoff += ((tdstit.pos / tilesize) % 2 == 0) ? -1 : 1;
if (tdstit.pos % tilesize >= cutoff)
{
dest(tdstit.x, tdstit.y) = tileU(srcit.x, srcit.y);
}
}
}
// draw E-ascending stairs inverted
void drawInvStairsE(RGBAImage& dest, const ImageRect& drect, RGBAImage& tileWS, RGBAImage& tileU, int B)
{
int tilesize = 2*B;
// draw the bottom half of a W face at [B,B/2]; do this first because the others will partially cover it
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x + B, drect.y + B/2, 1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
// ...but if B is odd, we need to add an extra [0,1] to the even-numbered columns
int adjust = 0;
if (B % 2 == 1 && (dstit.pos / tilesize) % 2 == 0)
adjust = 1;
if (dstit.pos % tilesize >= B)
{
dest(dstit.x, dstit.y + adjust) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y + adjust), 0.9, 0.9, 0.9);
}
}
// normal W face starts at [0,B]; draw the top half of it
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x, drect.y + B, 1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize < B)
{
dest(dstit.x, dstit.y) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y), 0.9, 0.9, 0.9);
}
}
// normal S face starts at [2B,2B]; draw all but the lower-left quarter of it
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x + 2*B, drect.y + 2*B, -1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize < B || dstit.pos / tilesize >= B)
{
dest(dstit.x, dstit.y) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y), 0.8, 0.8, 0.8);
}
}
// normal U face starts at [2B-1,0]; draw the whole thing
TopFaceIterator tdstit(drect.x + 2*B-1, drect.y, tilesize);
for (FaceIterator srcit(0, 0, 0, tilesize); !srcit.end; srcit.advance(), tdstit.advance())
{
dest(tdstit.x, tdstit.y) = tileU(srcit.x, srcit.y);
}
}
// draw W-ascending stairs
void drawStairsW(RGBAImage& dest, const ImageRect& drect, RGBAImage& tileWS, RGBAImage& tileU, int B)
{
int tilesize = 2*B;
// draw the top half of an an U face at [2B-1,B]
TopFaceIterator tdstit(drect.x + 2*B-1, drect.y + B, tilesize);
for (FaceIterator srcit(0, 0, 0, tilesize); !srcit.end; srcit.advance(), tdstit.advance())
{
// if B is odd, we need B pixels from each column, but if it's even, we need to alternate between
// B-1 and B+1
int cutoff = B;
if (B % 2 == 0)
cutoff += ((tdstit.pos / tilesize) % 2 == 0) ? -1 : 1;
if (tdstit.pos % tilesize < cutoff)
{
dest(tdstit.x, tdstit.y) = tileU(srcit.x, srcit.y);
}
}
// draw the bottom half of the normal U face at [2B-1,0]
tdstit = TopFaceIterator(drect.x + 2*B-1, drect.y, tilesize);
for (FaceIterator srcit(0, 0, 0, tilesize); !srcit.end; srcit.advance(), tdstit.advance())
{
// again, if B is odd, take B pixels from each column; if even, take B-1 or B+1
int cutoff = B;
if (B % 2 == 0)
cutoff += ((tdstit.pos / tilesize) % 2 == 0) ? -1 : 1;
if (tdstit.pos % tilesize >= cutoff)
{
dest(tdstit.x, tdstit.y) = tileU(srcit.x, srcit.y);
}
}
// normal W face starts at [0,B]; draw it all
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x, drect.y + B, 1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
dest(dstit.x, dstit.y) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y), 0.9, 0.9, 0.9);
}
// normal S face starts at [2B,2B]; draw all but the upper-right quarter of it
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x + 2*B, drect.y + 2*B, -1, tilesize); !srcit.end; srcit.advance(), dstit.advance())
{
if (dstit.pos % tilesize >= B || dstit.pos / tilesize < B)
{
dest(dstit.x, dstit.y) = tileWS(srcit.x, srcit.y);
darken(dest(dstit.x, dstit.y), 0.8, 0.8, 0.8);
}
}
}
// draw W-ascending stairs inverted
void drawInvStairsW(RGBAImage& dest, const ImageRect& drect, RGBAImage& tileWS, RGBAImage& tileU, int B)
{
int tilesize = 2*B;
// normal U face starts at [2B-1,0]; draw the whole thing
TopFaceIterator tdstit(drect.x + 2*B-1, drect.y, tilesize);
for (FaceIterator srcit(0, 0, 0, tilesize); !srcit.end; srcit.advance(), tdstit.advance())
{
dest(tdstit.x, tdstit.y) = tileU(srcit.x, srcit.y);
}
// normal W face starts at [0,B]; draw it all
for (FaceIterator srcit(0, 0, 0, tilesize),
dstit(drect.x, drect.y + B, 1, tilesize); !srcit.end; srcit.advance(), dstit.advance())