fixes to get lighting mode working again

overviewer_core/rendermodes.py

@@ -0,0 +1,74 @@
+#    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/>.
+
+from PIL import Image
+import textures
+
+# Render 3 blending masks for lighting
+# first is top (+Z), second is left (-X), third is right (+Y)
+def generate_facemasks():
+    white = Image.new("L", (24,24), 255)
+    
+    top = Image.new("L", (24,24), 0)
+    left = Image.new("L", (24,24), 0)
+    whole = Image.new("L", (24,24), 0)
+    
+    toppart = textures.Textures.transform_image_top(white)
+    leftpart = textures.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)
+    
+    # Manually touch up 6 pixels that leave a gap, like in
+    # textures._build_block()
+    for x,y in [(13,23), (17,21), (21,19)]:
+        right.putpixel((x,y), 255)
+    for x,y in [(3,4), (7,2), (11,0)]:
+        top.putpixel((x,y), 255)
+    
+    # special fix for chunk boundary stipple
+    for x,y in [(13,11), (17,9), (21,7)]:
+        right.putpixel((x,y), 0)
+    
+    return (top, left, right)
+facemasks = generate_facemasks()
+black_color = Image.new("RGB", (24,24), (0,0,0))
+white_color = Image.new("RGB", (24,24), (255,255,255))
+
+# Render 128 different color images for color coded depth blending in cave mode
+def generate_depthcolors():
+    depth_colors = []
+    r = 255
+    g = 0
+    b = 0
+    for z in range(128):
+        depth_colors.append(r)
+        depth_colors.append(g)
+        depth_colors.append(b)
+        
+        if z < 32:
+            g += 7
+        elif z < 64:
+            r -= 7
+        elif z < 96:
+            b += 7
+        else:
+            g -= 7
+
+    return depth_colors
+depth_colors = generate_depthcolors()

overviewer_core/src/iterate.c

@@ -18,6 +18,7 @@
 #include "overviewer.h"
 
 static PyObject *textures = NULL;
+static PyObject *support = NULL;
 
 unsigned int max_blockid = 0;
 unsigned int max_data = 0;
@@ -46,6 +47,11 @@ PyObject *init_chunk_render(void) {
         return NULL;
     }
     
+    support = PyImport_ImportModule("overviewer_core.rendermodes");
+    if (!support) {
+        return NULL;
+    }
+    
     tmp = PyObject_GetAttrString(textures, "max_blockid");
     if (!tmp)
         return NULL;
@@ -96,7 +102,9 @@ PyObject *init_chunk_render(void) {
     Py_RETURN_NONE;
 }
 
-PyObject *get_chunk_data(PyObject *region_set, int x, int z, ChunkNeighborName neighbor, ChunkDataType type) {
+PyObject *get_chunk_data(RenderState *state, ChunkNeighborName neighbor, ChunkDataType type) {
+    int x = state->chunkx;
+    int z = state->chunkz;
     PyObject *chunk = NULL;
     PyObject *data = NULL;
     
@@ -117,7 +125,7 @@ PyObject *get_chunk_data(PyObject *region_set, int x, int z, ChunkNeighborName n
         break;
     }
     
-    chunk = PyObject_CallMethod(region_set, "get_chunk", "ii", x, z);
+    chunk = PyObject_CallMethod(state->regionset, "get_chunk", "ii", x, z);
     if (chunk == NULL || chunk == Py_None)
         return chunk;
     
@@ -401,10 +409,8 @@ chunk_render(PyObject *self, PyObject *args) {
     if (!PyArg_ParseTuple(args, "OiiOiisO",  &state.regionset, &state.chunkx, &state.chunkz, &state.img, &xoff, &yoff, &rendermode_name, &state.textures))
         return NULL;
     
-    /* conveniences */
-    regionset = state.regionset;
-    chunkx = state.chunkx;
-    chunkz = state.chunkz;
+    /* rendermode support */
+    state.support = support;
     
     /* set up the render mode */
     state.rendermode = rendermode = render_mode_create(rendermode_name, &state);
@@ -435,25 +441,25 @@ chunk_render(PyObject *self, PyObject *args) {
     Py_DECREF(imgsize1_py);
 
     /* get the block data directly from numpy: */
-    blocks_py = get_chunk_data(regionset, chunkx, chunkz, CURRENT, BLOCKS);
+    blocks_py = get_chunk_data(&state, CURRENT, BLOCKS);
     state.blocks = blocks_py;
     if (blocks_py == Py_None) {
         PyErr_SetString(PyExc_RuntimeError, "chunk does not exist!");
         return NULL;
     }
     
-    state.blockdatas = get_chunk_data(regionset, chunkx, chunkz, CURRENT, BLOCKDATA);
+    state.blockdatas = get_chunk_data(&state, CURRENT, BLOCKDATA);
 
-    left_blocks_py = get_chunk_data(regionset, chunkx, chunkz, DOWN_LEFT, BLOCKS);
+    left_blocks_py = get_chunk_data(&state, DOWN_LEFT, BLOCKS);
     state.left_blocks = left_blocks_py;
 
-    right_blocks_py = get_chunk_data(regionset, chunkx, chunkz, DOWN_RIGHT, BLOCKS);
+    right_blocks_py = get_chunk_data(&state, DOWN_RIGHT, BLOCKS);
     state.right_blocks = right_blocks_py;
 
-    up_left_blocks_py = get_chunk_data(regionset, chunkx, chunkz, UP_LEFT, BLOCKS);
+    up_left_blocks_py = get_chunk_data(&state, UP_LEFT, BLOCKS);
     state.up_left_blocks = up_left_blocks_py;
 
-    up_right_blocks_py = get_chunk_data(regionset, chunkx, chunkz, UP_RIGHT, BLOCKS);
+    up_right_blocks_py = get_chunk_data(&state, UP_RIGHT, BLOCKS);
     state.up_right_blocks = up_right_blocks_py;
     
     /* set up the random number generator again for each chunk

overviewer_core/src/overviewer.h

@@ -79,6 +79,9 @@ typedef struct {
     /* the Texture object */
     PyObject *textures;
     
+    /* the rendermode support module (rendermodes.py) */
+    PyObject *support;
+    
     /* the block position and type, and the block array */
     int x, y, z;
     unsigned char block;
@@ -137,7 +140,7 @@ typedef enum
     UP_RIGHT,   /* +1,  0 */
     UP_LEFT,    /*  0, -1 */
 } ChunkNeighborName;
-PyObject *get_chunk_data(PyObject *region_set, int x, int z, ChunkNeighborName neighbor, ChunkDataType type);
+PyObject *get_chunk_data(RenderState *state, ChunkNeighborName neighbor, ChunkDataType type);
 
 /* pull in the rendermode info */
 #include "rendermodes.h"

overviewer_core/src/rendermode-lighting.c

@@ -360,22 +360,22 @@ rendermode_lighting_start(void *data, RenderState *state, PyObject *options) {
     if (!render_mode_parse_option(options, "color_light", "i", &(self->color_light)))
         return 1;
     
-    self->facemasks_py = PyObject_GetAttrString(state->chunk, "facemasks");
+    self->facemasks_py = PyObject_GetAttrString(state->support, "facemasks");
     // borrowed references, don't need to be decref'd
     self->facemasks[0] = PyTuple_GetItem(self->facemasks_py, 0);
     self->facemasks[1] = PyTuple_GetItem(self->facemasks_py, 1);
     self->facemasks[2] = PyTuple_GetItem(self->facemasks_py, 2);
     
-    self->skylight = PyObject_GetAttrString(state->self, "skylight");
-    self->blocklight = PyObject_GetAttrString(state->self, "blocklight");
-    self->left_skylight = PyObject_GetAttrString(state->self, "left_skylight");
-    self->left_blocklight = PyObject_GetAttrString(state->self, "left_blocklight");
-    self->right_skylight = PyObject_GetAttrString(state->self, "right_skylight");
-    self->right_blocklight = PyObject_GetAttrString(state->self, "right_blocklight");
-    self->up_left_skylight = PyObject_GetAttrString(state->self, "up_left_skylight");
-    self->up_left_blocklight = PyObject_GetAttrString(state->self, "up_left_blocklight");
-    self->up_right_skylight = PyObject_GetAttrString(state->self, "up_right_skylight");
-    self->up_right_blocklight = PyObject_GetAttrString(state->self, "up_right_blocklight");
+    self->skylight = get_chunk_data(state, CURRENT, SKYLIGHT);
+    self->blocklight = get_chunk_data(state, CURRENT, BLOCKLIGHT);
+    self->left_skylight = get_chunk_data(state, DOWN_LEFT, SKYLIGHT);
+    self->left_blocklight = get_chunk_data(state, DOWN_LEFT, BLOCKLIGHT);
+    self->right_skylight = get_chunk_data(state, DOWN_RIGHT, SKYLIGHT);
+    self->right_blocklight = get_chunk_data(state, DOWN_RIGHT, BLOCKLIGHT);
+    self->up_left_skylight = get_chunk_data(state, UP_LEFT, SKYLIGHT);
+    self->up_left_blocklight = get_chunk_data(state, UP_LEFT, BLOCKLIGHT);
+    self->up_right_skylight = get_chunk_data(state, UP_RIGHT, SKYLIGHT);
+    self->up_right_blocklight = get_chunk_data(state, UP_RIGHT, BLOCKLIGHT);
     
     if (self->night) {
         self->calculate_light_color = calculate_light_color_night;

overviewer_core/src/rendermodes.c

@@ -24,8 +24,8 @@
    that are only useful as a base for other modes. */
 static RenderModeInterface *render_modes[] = {
     &rendermode_normal,
-    /*&rendermode_lighting,
-    &rendermode_smooth_lighting,
+    &rendermode_lighting,
+    /*&rendermode_smooth_lighting,
     &rendermode_spawn,
     &rendermode_cave,
     &rendermode_mineral,*/

overviewer_core/textures.py

@@ -255,7 +255,8 @@ class Textures(object):
     ## Image Transformation Functions
     ##
 
-    def transform_image_top(self, img):
+    @staticmethod
+    def transform_image_top(img):
         """Takes a PIL image and rotates it left 45 degrees and shrinks the y axis
         by a factor of 2. Returns the resulting image, which will be 24x12 pixels
 
@@ -283,7 +284,8 @@ class Textures(object):
         newimg = img.transform((24,12), Image.AFFINE, transform)
         return newimg
 
-    def transform_image_side(self, img):
+    @staticmethod
+    def transform_image_side(img):
         """Takes an image and shears it for the left side of the cube (reflect for
         the right side)"""
 
@@ -299,7 +301,8 @@ class Textures(object):
         newimg = img.transform((12,18), Image.AFFINE, transform)
         return newimg
 
-    def transform_image_slope(self, img):
+    @staticmethod
+    def transform_image_slope(img):
         """Takes an image and shears it in the shape of a slope going up
         in the -y direction (reflect for +x direction). Used for minetracks"""
 
@@ -316,7 +319,8 @@ class Textures(object):
         return newimg
 
 
-    def transform_image_angle(self, img, angle):
+    @staticmethod
+    def transform_image_angle(img, angle):
         """Takes an image an shears it in arbitrary angle with the axis of
         rotation being vertical.
 

setup.py

@@ -150,7 +150,7 @@ except Exception:
 
 # used to figure out what files to compile
 #render_modes = ['normal', 'overlay', 'lighting', 'smooth-lighting', 'spawn', 'cave', 'mineral']
-render_modes = ['normal']
+render_modes = ['normal', 'lighting']
 
 c_overviewer_files = ['main.c', 'composite.c', 'iterate.c', 'endian.c', 'rendermodes.c']
 c_overviewer_files += map(lambda mode: 'rendermode-%s.c' % (mode,), render_modes)