LogalDeveloper/Minecraft-Overviewer
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Merge branch 'blending' of https://github.com/agrif/Minecraft-Overviewer into agrif-blending

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This commit is contained in:
Andrew Brown
2010-11-07 08:09:25 -05:00
parent 366a56603b 759a9663af
commit 21ac6689e6
8 changed files with 431 additions and 60 deletions
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7
.gitignore vendored
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@@ -1 +1,8 @@
*.pyc
build
# various forms of compiled _composite extensions
_composite.so
_composite.pyd
_composite_d.pyd
_composite.dylib

22
README.rst
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@@ -85,6 +85,28 @@ you can use the Overviewer:
hidden directory). You can also get this file from any of the third party
texture packs out there.
Compiling the C Extension (optional)
------------------------------------
The C Extension for Overviewer is completely optional. It provides a higher
quality image compositing function that looks better on maps with lighting
enabled, and a slight performance boost.
If you downloaded Overviewer as a binary package, this extension may be already
compiled for you. Overviewer emits a warning if the extension is not found, but
will still work fine.
If you have a C compiler and the Python development libraries set up, you can
compile this extension like this::
python setup.py build
Note that you need the development headers for your version of Python installed,
look for a package named 'python-dev', 'python-devel' or similar. Also, some
Python distributions do not install "Imaging.h" and "ImPlatform.h" properly. If
you get errors complaining about them, you can get them from the PIL source, or
at <http://svn.effbot.org/public/tags/pil-1.1.7/libImaging/>. Just put them in
the same directory as "_composite.c".
Running
-------
To generate a set of Google Map tiles, use the gmap.py script like this::

224
_composite.c Normal file
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@@ -0,0 +1,224 @@
/*
* This file is part of the Minecraft Overviewer.
*
* Minecraft Overviewer 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.
*
* Minecraft Overviewer 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 the Overviewer. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This file implements a custom alpha_over function for (some) PIL
* images. It's designed to be used through composite.py, which
* includes a proxy alpha_over function that falls back to the default
* PIL paste if this extension is not found.
*/
#include <Python.h>
#include <Imaging.h>
/* like (a * b + 127) / 255), but much faster on most platforms
from PIL's _imaging.c */
#define MULDIV255(a, b, tmp) \
(tmp = (a) * (b) + 128, ((((tmp) >> 8) + (tmp)) >> 8))
typedef struct
{
PyObject_HEAD
Imaging image;
} ImagingObject;
static Imaging imaging_python_to_c(PyObject* obj)
{
PyObject* im;
Imaging image;
/* first, get the 'im' attribute */
im = PyObject_GetAttrString(obj, "im");
if (!im)
return NULL;
/* make sure 'im' is the right type */
if (strcmp(im->ob_type->tp_name, "ImagingCore") != 0)
{
/* it's not -- raise an error and exit */
PyErr_SetString(PyExc_TypeError, "image attribute 'im' is not a core Imaging type");
return NULL;
}
image = ((ImagingObject*)im)->image;
Py_DECREF(im);
return image;
}
static PyObject* _composite_alpha_over(PyObject* self, PyObject* args)
{
/* raw input python variables */
PyObject* dest, * src, * pos, * mask;
/* libImaging handles */
Imaging imDest, imSrc, imMask;
/* cached blend properties */
int src_has_alpha, mask_offset, mask_stride;
/* destination position and size */
int dx, dy, xsize, ysize;
/* source position */
int sx, sy;
/* iteration variables */
unsigned int x, y, i;
/* temporary calculation variables */
int tmp1, tmp2, tmp3;
if (!PyArg_ParseTuple(args, "OOOO", &dest, &src, &pos, &mask))
return NULL;
imDest = imaging_python_to_c(dest);
imSrc = imaging_python_to_c(src);
imMask = imaging_python_to_c(mask);
if (!imDest || !imSrc || !imMask)
return NULL;
/* check the various image modes, make sure they make sense */
if (strcmp(imDest->mode, "RGBA") != 0)
{
PyErr_SetString(PyExc_ValueError, "given destination image does not have mode \"RGBA\"");
return NULL;
}
if (strcmp(imSrc->mode, "RGBA") != 0 && strcmp(imSrc->mode, "RGB") != 0)
{
PyErr_SetString(PyExc_ValueError, "given source image does not have mode \"RGBA\" or \"RGB\"");
return NULL;
}
if (strcmp(imMask->mode, "RGBA") != 0 && strcmp(imMask->mode, "L") != 0)
{
PyErr_SetString(PyExc_ValueError, "given mask image does not have mode \"RGBA\" or \"L\"");
return NULL;
}
/* make sure mask size matches src size */
if (imSrc->xsize != imMask->xsize || imSrc->ysize != imMask->ysize)
{
PyErr_SetString(PyExc_ValueError, "mask and source image sizes do not match");
return NULL;
}
/* set up flags for the src/mask type */
src_has_alpha = (imSrc->pixelsize == 4 ? 1 : 0);
/* how far into image the first alpha byte resides */
mask_offset = (imMask->pixelsize == 4 ? 3 : 0);
/* how many bytes to skip to get to the next alpha byte */
mask_stride = imMask->pixelsize;
/* destination position read */
if (!PyArg_ParseTuple(pos, "iiii", &dx, &dy, &xsize, &ysize))
{
PyErr_SetString(PyExc_TypeError, "given blend destination rect is not valid");
return NULL;
}
/* set up the source position, size and destination position */
/* handle negative dest pos */
if (dx < 0)
{
sx = -dx;
dx = 0;
} else {
sx = 0;
}
if (dy < 0)
{
sy = -dy;
dy = 0;
} else {
sy = 0;
}
/* set up source dimensions */
xsize -= sx;
ysize -= sy;
/* clip dimensions, if needed */
if (dx + xsize > imDest->xsize)
xsize = imDest->xsize - dx;
if (dy + ysize > imDest->ysize)
ysize = imDest->ysize - dy;
/* check that there remains any blending to be done */
if (xsize <= 0 || ysize <= 0)
{
/* nothing to do, return */
Py_INCREF(dest);
return dest;
}
for (y = 0; y < ysize; y++)
{
UINT8* out = (UINT8*) imDest->image[dy + y] + dx*4;
UINT8* outmask = (UINT8*) imDest->image[dy + y] + dx*4 + 3;
UINT8* in = (UINT8*) imSrc->image[sy + y] + sx*(imSrc->pixelsize);
UINT8* inmask = (UINT8*) imMask->image[sy + y] + sx*mask_stride + mask_offset;
for (x = 0; x < xsize; x++)
{
/* special cases */
if (*inmask == 255 || *outmask == 0)
{
*outmask = *inmask;
*out = *in;
out++, in++;
*out = *in;
out++, in++;
*out = *in;
out++, in++;
} else if (*inmask == 0) {
/* do nothing -- source is fully transparent */
out += 3;
in += 3;
} else {
/* general case */
int alpha = *inmask + MULDIV255(*outmask, 255 - *inmask, tmp1);
for (i = 0; i < 3; i++)
{
/* general case */
*out = MULDIV255(*in, *inmask, tmp1) + MULDIV255(MULDIV255(*out, *outmask, tmp2), 255 - *inmask, tmp3);
*out = (*out * 255) / alpha;
out++, in++;
}
*outmask = alpha;
}
out++;
if (src_has_alpha)
in++;
outmask += 4;
inmask += mask_stride;
}
}
Py_INCREF(dest);
return dest;
}
static PyMethodDef _CompositeMethods[] =
{
{"alpha_over", _composite_alpha_over, METH_VARARGS, "alpha over composite function"},
{NULL, NULL, 0, NULL}
};
PyMODINIT_FUNC init_composite(void)
{
(void) Py_InitModule("_composite", _CompositeMethods);
}

23
chunk.py
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@@ -22,6 +22,7 @@ import logging
import nbt
import textures
import world
import composite
"""
This module has routines related to rendering one particular chunk into an
@@ -36,7 +37,11 @@ image
# of the dest image will have its alpha channel modified. To prevent this:
# first use im.split() and take the third item which is the alpha channel and
# use that as the mask. Then take the image and use im.convert("RGB") to strip
# the image from its alpha channel, and use that as the source to paste()
# the image from its alpha channel, and use that as the source to alpha_over()
# (note that this workaround is NOT technically needed when using the
# alpha_over extension, BUT this extension may fall back to PIL's
# paste(), which DOES need the workaround.)
def get_lvldata(filename):
"""Takes a filename and returns the Level struct, which contains all the
@@ -556,36 +561,36 @@ class ChunkRenderer(object):
# tint the block with a color proportional to its depth
if cave:
# no lighting for cave -- depth is probably more useful
img.paste(Image.blend(t[0],depth_colors[z],0.3), (imgx, imgy), t[1])
composite.alpha_over(img, Image.blend(t[0],depth_colors[z],0.3), (imgx, imgy), t[1])
else:
if not self.world.lighting:
# no lighting at all
img.paste(t[0], (imgx, imgy), t[1])
composite.alpha_over(img, t[0], (imgx, imgy), t[1])
elif blockid in transparent_blocks:
# transparent means draw the whole
# block shaded with the current
# block's light
black_coeff, _ = self.get_lighting_coefficient(x, y, z)
img.paste(Image.blend(t[0], black_color, black_coeff), (imgx, imgy), t[1])
composite.alpha_over(img, Image.blend(t[0], black_color, black_coeff), (imgx, imgy), t[1])
else:
# draw each face lit appropriately,
# but first just draw the block
img.paste(t[0], (imgx, imgy), t[1])
composite.alpha_over(img, t[0], (imgx, imgy), t[1])
# top face
black_coeff, face_occlude = self.get_lighting_coefficient(x, y, z + 1)
if not face_occlude:
img.paste((0,0,0), (imgx, imgy), ImageEnhance.Brightness(facemasks[0]).enhance(black_coeff))
composite.alpha_over(img, black_color, (imgx, imgy), ImageEnhance.Brightness(facemasks[0]).enhance(black_coeff))
# left face
black_coeff, face_occlude = self.get_lighting_coefficient(x - 1, y, z)
if not face_occlude:
img.paste((0,0,0), (imgx, imgy), ImageEnhance.Brightness(facemasks[1]).enhance(black_coeff))
composite.alpha_over(img, black_color, (imgx, imgy), ImageEnhance.Brightness(facemasks[1]).enhance(black_coeff))
# right face
black_coeff, face_occlude = self.get_lighting_coefficient(x, y + 1, z)
if not face_occlude:
img.paste((0,0,0), (imgx, imgy), ImageEnhance.Brightness(facemasks[2]).enhance(black_coeff))
composite.alpha_over(img, black_color, (imgx, imgy), ImageEnhance.Brightness(facemasks[2]).enhance(black_coeff))
# Draw edge lines
if blockid in (44,): # step block
@@ -616,6 +621,8 @@ def generate_facemasks():
toppart = textures.transform_image(white)
leftpart = textures.transform_image_side(white)
# using the real PIL paste here (not alpha_over) because there is
# no alpha channel (and it's mode "L")
top.paste(toppart, (0,0))
left.paste(leftpart, (0,6))
right = left.transpose(Image.FLIP_LEFT_RIGHT)

51
composite.py Normal file
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@@ -0,0 +1,51 @@
# This file is part of the Minecraft Overviewer.
#
# Minecraft Overviewer 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.
#
# Minecraft Overviewer 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 the Overviewer. If not, see <http://www.gnu.org/licenses/>.
import logging
from PIL import Image
"""
This module has an alpha-over function that is used throughout
Overviewer. It defaults to the PIL paste function when the custom
alpha-over extension cannot be found.
"""
extension_alpha_over = None
try:
from _composite import alpha_over as _extension_alpha_over
extension_alpha_over = _extension_alpha_over
except ImportError:
logging.warning("alpha_over extension not found; using default PIL paste()")
def alpha_over(dest, src, pos_or_rect=(0, 0), mask=None):
"""Composite src over dest, using mask as the alpha channel (if
given), otherwise using src's alpha channel. pos_or_rect can
either be a position or a rectangle, specifying where on dest to
put src. Falls back to dest.paste() if the alpha_over extension
can't be found."""
if mask == None:
mask = src
global extension_alpha_over
if extension_alpha_over != None:
# extension ALWAYS expects rects, so convert if needed
if len(pos_or_rect) == 2:
pos_or_rect = (pos_or_rect[0], pos_or_rect[1], src.size[0], src.size[1])
extension_alpha_over(dest, src, pos_or_rect, mask)
else:
# fallback
dest.paste(src, pos_or_rect, mask)

6
quadtree.py
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@@ -29,6 +29,7 @@ import util
from PIL import Image
from optimizeimages import optimize_image
import composite
"""
@@ -450,6 +451,9 @@ def render_innertile(dest, name, imgformat, optimizeimg):
# Create the actual image now
img = Image.new("RGBA", (384, 384), (38,92,255,0))
# we'll use paste (NOT alpha_over) for quadtree generation because
# this is just straight image stitching, not alpha blending
if q0path:
try:
quad0 = Image.open(q0path).resize((192,192), Image.ANTIALIAS)
@@ -613,7 +617,7 @@ def render_worldtile(chunks, colstart, colend, rowstart, rowend, path, imgformat
xpos = -192 + (col-colstart)*192
ypos = -96 + (row-rowstart)*96
tileimg.paste(chunkimg.convert("RGB"), (xpos, ypos), chunkimg)
composite.alpha_over(tileimg, chunkimg.convert("RGB"), (xpos, ypos), chunkimg)
# Save them
tileimg.save(imgpath)

75
setup.py
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@@ -1,13 +1,68 @@
from distutils.core import setup
import py2exe
from distutils.core import setup, Extension
from distutils.command.build import build
from distutils.command.clean import clean
from distutils.dir_util import remove_tree
from distutils import log
import os, os.path
setup(console=['gmap.py'],
data_files=[('textures', ['textures/lava.png', 'textures/water.png']),
('', ['template.html'])],
zipfile = None,
options = {'py2exe': {
'bundle_files': 1,
}},
try:
import py2exe
except ImportError:
py2exe = None
# now, setup the keyword arguments for setup
# (because we don't know until runtime if py2exe is available)
setup_kwargs = {}
setup_kwargs['options'] = {}
setup_kwargs['ext_modules'] = []
setup_kwargs['cmdclass'] = {}
)
#
# py2exe options
#
if py2exe != None:
setup_kwargs['console'] = ['gmap.py']
setup_kwargs['data_files'] = [('textures', ['textures/lava.png', 'textures/water.png']),
('', ['template.html'])]
setup_kwargs['zipfile'] = None
setup_kwargs['options']['py2exe'] = {'bundle_files' : 1}
#
# _composite.c extension
#
setup_kwargs['ext_modules'].append(Extension('_composite', ['_composite.c']))
# tell build_ext to build the extension in-place
# (NOT in build/)
setup_kwargs['options']['build_ext'] = {'inplace' : 1}
# tell the build command to only run build_ext
build.sub_commands = [('build_ext', None)]
# custom clean command to remove in-place extension
class CustomClean(clean):
def run(self):
# do the normal cleanup
clean.run(self)
# try to remove '_composite.{so,pyd,...}' extension,
# regardless of the current system's extension name convention
build_ext = self.get_finalized_command('build_ext')
fname = build_ext.get_ext_fullpath('_composite')
pretty_fname = os.path.split(fname)[1]
if os.path.exists(fname):
try:
if not self.dry_run:
os.remove(fname)
log.info("removing '%s'", pretty_fname)
except OSError:
log.warn("'%s' could not be cleaned -- permission denied",
pretty_fname)
else:
log.debug("'%s' does not exist -- can't clean it",
pretty_fname)
setup_kwargs['cmdclass']['clean'] = CustomClean
###
setup(**setup_kwargs)

79
textures.py
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@@ -24,6 +24,7 @@ import numpy
from PIL import Image, ImageEnhance
import util
import composite
def _find_file(filename, mode="rb"):
"""Searches for the given file and returns an open handle to it.
@@ -157,13 +158,13 @@ def transform_image_side(img, blockID=None):
# img to be unchanged
mask = img.crop((0,8,16,16))
n = Image.new(img.mode, img.size, (38,92,255,0))
n.paste(mask,(0,0,16,8), mask)
composite.alpha_over(n, mask,(0,0,16,8), mask)
img = n
if blockID in (78,): # snow
# make the top three quarters transparent
mask = img.crop((0,12,16,16))
n = Image.new(img.mode, img.size, (38,92,255,0))
n.paste(mask,(0,12,16,16), mask)
composite.alpha_over(n, mask,(0,12,16,16), mask)
img = n
# Size of the cube side before shear
@@ -189,7 +190,7 @@ def _build_block(top, side, blockID=None):
top = transform_image(top, blockID)
if not side:
img.paste(top, (0,0), top)
composite.alpha_over(img, top, (0,0), top)
return img
side = transform_image_side(side, blockID)
@@ -212,29 +213,29 @@ def _build_block(top, side, blockID=None):
if blockID in (37,38,6,39,40,50,83): ## flowers, sapling, mushrooms, regular torch, reeds
# instead of pasting these blocks at the cube edges, place them in the middle:
# and omit the top
img.paste(side, (6,3), side)
img.paste(otherside, (6,3), otherside)
composite.alpha_over(img, side, (6,3), side)
composite.alpha_over(img, otherside, (6,3), otherside)
return img
if blockID in (81,): # cacti!
img.paste(side, (2,6), side)
img.paste(otherside, (10,6), otherside)
img.paste(top, (0,2), top)
composite.alpha_over(img, side, (2,6), side)
composite.alpha_over(img, otherside, (10,6), otherside)
composite.alpha_over(img, top, (0,2), top)
elif blockID in (44,): # half step
# shift each texture down 6 pixels
img.paste(side, (0,12), side)
img.paste(otherside, (12,12), otherside)
img.paste(top, (0,6), top)
composite.alpha_over(img, side, (0,12), side)
composite.alpha_over(img, otherside, (12,12), otherside)
composite.alpha_over(img, top, (0,6), top)
elif blockID in (78,): # snow
# shift each texture down 9 pixels
img.paste(side, (0,6), side)
img.paste(otherside, (12,6), otherside)
img.paste(top, (0,9), top)
composite.alpha_over(img, side, (0,6), side)
composite.alpha_over(img, otherside, (12,6), otherside)
composite.alpha_over(img, top, (0,9), top)
else:
img.paste(side, (0,6), side)
img.paste(otherside, (12,6), otherside)
img.paste(top, (0,0), top)
composite.alpha_over(img, side, (0,6), side)
composite.alpha_over(img, otherside, (12,6), otherside)
composite.alpha_over(img, top, (0,0), top)
# Manually touch up 6 pixels that leave a gap because of how the
# shearing works out. This makes the blocks perfectly tessellate-able
@@ -366,7 +367,7 @@ def generate_special_texture(blockID, data):
track = transform_image(raw_straight, blockID)
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(track, (0,12), track)
composite.alpha_over(img, track, (0,12), track)
return (img.convert("RGB"), img.split()[3])
if blockID == 59: # crops
@@ -376,9 +377,9 @@ def generate_special_texture(blockID, data):
crop3 = crop2.transpose(Image.FLIP_LEFT_RIGHT)
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(crop1, (0,12), crop1)
img.paste(crop2, (6,3), crop2)
img.paste(crop3, (6,3), crop3)
composite.alpha_over(img, crop1, (0,12), crop1)
composite.alpha_over(img, crop2, (6,3), crop2)
composite.alpha_over(img, crop3, (6,3), crop3)
return (img.convert("RGB"), img.split()[3])
if blockID == 61: #furnace
@@ -388,9 +389,9 @@ def generate_special_texture(blockID, data):
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(side1, (0,6), side1)
img.paste(side2, (12,6), side2)
img.paste(top, (0,0), top)
composite.alpha_over(img, side1, (0,6), side1)
composite.alpha_over(img, side2, (12,6), side2)
composite.alpha_over(img, top, (0,0), top)
return (img.convert("RGB"), img.split()[3])
if blockID == 62: # lit furnace
@@ -400,9 +401,9 @@ def generate_special_texture(blockID, data):
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(side1, (0,6), side1)
img.paste(side2, (12,6), side2)
img.paste(top, (0,0), top)
composite.alpha_over(img, side1, (0,6), side1)
composite.alpha_over(img, side2, (12,6), side2)
composite.alpha_over(img, top, (0,0), top)
return (img.convert("RGB"), img.split()[3])
if blockID == 65: # ladder
@@ -414,22 +415,22 @@ def generate_special_texture(blockID, data):
# have to render this thing anyway. same for data == 2
tex = transform_image_side(raw_texture)
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(tex, (0,6), tex)
composite.alpha_over(img, tex, (0,6), tex)
return (img.convert("RGB"), img.split()[3])
if data == 2:
tex = transform_image_side(raw_texture).transpose(Image.FLIP_LEFT_RIGHT)
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(tex, (12,6), tex)
composite.alpha_over(img, tex, (12,6), tex)
return (img.convert("RGB"), img.split()[3])
if data == 3:
tex = transform_image_side(raw_texture).transpose(Image.FLIP_LEFT_RIGHT)
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(tex, (0,0), tex)
composite.alpha_over(img, tex, (0,0), tex)
return (img.convert("RGB"), img.split()[3])
if data == 4:
tex = transform_image_side(raw_texture)
img = Image.new("RGBA", (24,24), (38,92,255,0))
img.paste(tex, (12,0), tex)
composite.alpha_over(img, tex, (12,0), tex)
return (img.convert("RGB"), img.split()[3])
if blockID in (64,71): #wooden door, or iron door
@@ -450,36 +451,36 @@ def generate_special_texture(blockID, data):
if (data & 0x03) == 0:
if not swung:
tex = transform_image_side(raw_door)
img.paste(tex, (0,6), tex)
composite.alpha_over(img, tex, (0,6), tex)
else:
# flip first to set the doornob on the correct side
tex = transform_image_side(raw_door.transpose(Image.FLIP_LEFT_RIGHT))
tex = tex.transpose(Image.FLIP_LEFT_RIGHT)
img.paste(tex, (0,0), tex)
composite.alpha_over(img, tex, (0,0), tex)
if (data & 0x03) == 1:
if not swung:
tex = transform_image_side(raw_door).transpose(Image.FLIP_LEFT_RIGHT)
img.paste(tex, (0,0), tex)
composite.alpha_over(img, tex, (0,0), tex)
else:
tex = transform_image_side(raw_door)
img.paste(tex, (12,0), tex)
composite.alpha_over(img, tex, (12,0), tex)
if (data & 0x03) == 2:
if not swung:
tex = transform_image_side(raw_door.transpose(Image.FLIP_LEFT_RIGHT))
img.paste(tex, (12,0), tex)
composite.alpha_over(img, tex, (12,0), tex)
else:
tex = transform_image_side(raw_door).transpose(Image.FLIP_LEFT_RIGHT)
img.paste(tex, (12,6), tex)
composite.alpha_over(img, tex, (12,6), tex)
if (data & 0x03) == 3:
if not swung:
tex = transform_image_side(raw_door.transpose(Image.FLIP_LEFT_RIGHT)).transpose(Image.FLIP_LEFT_RIGHT)
img.paste(tex, (12,6), tex)
composite.alpha_over(img, tex, (12,6), tex)
else:
tex = transform_image_side(raw_door.transpose(Image.FLIP_LEFT_RIGHT))
img.paste(tex, (0,6), tex)
composite.alpha_over(img, tex, (0,6), tex)
return (img.convert("RGB"), img.split()[3])