629 lines
22 KiB
C
629 lines
22 KiB
C
/*
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* This file is part of the Minecraft Overviewer.
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*
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* Minecraft Overviewer is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or (at
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* your option) any later version.
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*
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* Minecraft Overviewer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the Overviewer. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "overviewer.h"
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static PyObject *textures = NULL;
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unsigned int max_blockid = 0;
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unsigned int max_data = 0;
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unsigned char *block_properties = NULL;
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static PyObject *known_blocks = NULL;
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static PyObject *transparent_blocks = NULL;
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static PyObject *solid_blocks = NULL;
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static PyObject *fluid_blocks = NULL;
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static PyObject *nospawn_blocks = NULL;
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static PyObject *nodata_blocks = NULL;
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PyObject *init_chunk_render(void) {
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PyObject *tmp = NULL;
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unsigned int i;
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/* this function only needs to be called once, anything more should be
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* ignored */
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if (textures) {
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Py_RETURN_NONE;
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}
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textures = PyImport_ImportModule("overviewer_core.textures");
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/* ensure none of these pointers are NULL */
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if ((!textures)) {
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return NULL;
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}
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tmp = PyObject_GetAttrString(textures, "max_blockid");
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if (!tmp)
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return NULL;
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max_blockid = PyInt_AsLong(tmp);
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Py_DECREF(tmp);
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tmp = PyObject_GetAttrString(textures, "max_data");
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if (!tmp)
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return NULL;
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max_data = PyInt_AsLong(tmp);
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Py_DECREF(tmp);
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/* assemble the property table */
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known_blocks = PyObject_GetAttrString(textures, "known_blocks");
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if (!known_blocks)
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return NULL;
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transparent_blocks = PyObject_GetAttrString(textures, "transparent_blocks");
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if (!transparent_blocks)
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return NULL;
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solid_blocks = PyObject_GetAttrString(textures, "solid_blocks");
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if (!solid_blocks)
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return NULL;
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fluid_blocks = PyObject_GetAttrString(textures, "fluid_blocks");
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if (!fluid_blocks)
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return NULL;
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nospawn_blocks = PyObject_GetAttrString(textures, "nospawn_blocks");
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if (!nospawn_blocks)
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return NULL;
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nodata_blocks = PyObject_GetAttrString(textures, "nodata_blocks");
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if (!nodata_blocks)
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return NULL;
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block_properties = calloc(max_blockid, sizeof(unsigned char));
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for (i = 0; i < max_blockid; i++) {
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PyObject *block = PyInt_FromLong(i);
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if (PySequence_Contains(known_blocks, block))
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block_properties[i] |= 1 << KNOWN;
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if (PySequence_Contains(transparent_blocks, block))
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block_properties[i] |= 1 << TRANSPARENT;
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if (PySequence_Contains(solid_blocks, block))
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block_properties[i] |= 1 << SOLID;
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if (PySequence_Contains(fluid_blocks, block))
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block_properties[i] |= 1 << FLUID;
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if (PySequence_Contains(nospawn_blocks, block))
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block_properties[i] |= 1 << NOSPAWN;
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if (PySequence_Contains(nodata_blocks, block))
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block_properties[i] |= 1 << NODATA;
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Py_DECREF(block);
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}
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Py_RETURN_NONE;
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}
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/* helper for load_chunk, loads a section into a chunk */
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static inline void load_chunk_section(ChunkData *dest, int i, PyObject *section) {
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dest->sections[i].blocks = PyDict_GetItemString(section, "Blocks");
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dest->sections[i].data = PyDict_GetItemString(section, "Data");
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dest->sections[i].skylight = PyDict_GetItemString(section, "SkyLight");
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dest->sections[i].blocklight = PyDict_GetItemString(section, "BlockLight");
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Py_INCREF(dest->sections[i].blocks);
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Py_INCREF(dest->sections[i].data);
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Py_INCREF(dest->sections[i].skylight);
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Py_INCREF(dest->sections[i].blocklight);
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}
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/* loads the given chunk into the chunks[] array in the state
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* returns true on error
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*
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* if required is true, failure to load the chunk will raise a python
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* exception and return true.
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*/
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int load_chunk(RenderState* state, int x, int z, unsigned char required) {
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ChunkData *dest = &(state->chunks[1 + x][1 + z]);
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int i;
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PyObject *chunk = NULL;
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PyObject *sections = NULL;
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if (dest->loaded)
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return 0;
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/* set up reasonable defaults */
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dest->biomes = NULL;
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for (i = 0; i < SECTIONS_PER_CHUNK; i++)
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{
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dest->sections[i].blocks = NULL;
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dest->sections[i].data = NULL;
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dest->sections[i].skylight = NULL;
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dest->sections[i].blocklight = NULL;
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}
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dest->loaded = 1;
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x += state->chunkx;
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z += state->chunkz;
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chunk = PyObject_CallMethod(state->regionset, "get_chunk", "ii", x, z);
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if (chunk == NULL) {
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// An exception is already set. RegionSet.get_chunk sets
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// ChunkDoesntExist
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if (!required) {
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PyErr_Clear();
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}
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return 1;
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}
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sections = PyDict_GetItemString(chunk, "Sections");
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if (sections) {
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sections = PySequence_Fast(sections, "Sections tag was not a list!");
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}
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if (sections == NULL) {
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// exception set, again
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Py_DECREF(chunk);
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if (!required) {
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PyErr_Clear();
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}
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return 1;
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}
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dest->biomes = PyDict_GetItemString(chunk, "Biomes");
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Py_INCREF(dest->biomes);
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for (i = 0; i < PySequence_Fast_GET_SIZE(sections); i++) {
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PyObject *ycoord = NULL;
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int sectiony = 0;
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PyObject *section = PySequence_Fast_GET_ITEM(sections, i);
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ycoord = PyDict_GetItemString(section, "Y");
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if (!ycoord)
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continue;
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sectiony = PyInt_AsLong(ycoord);
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if (sectiony >= 0 && sectiony < SECTIONS_PER_CHUNK)
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load_chunk_section(dest, sectiony, section);
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}
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Py_DECREF(sections);
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Py_DECREF(chunk);
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return 0;
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}
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/* helper to unload all loaded chunks */
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static void
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unload_all_chunks(RenderState *state) {
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unsigned int i, j, k;
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for (i = 0; i < 3; i++) {
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for (j = 0; j < 3; j++) {
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if (state->chunks[i][j].loaded) {
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Py_XDECREF(state->chunks[i][j].biomes);
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for (k = 0; k < SECTIONS_PER_CHUNK; k++) {
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Py_XDECREF(state->chunks[i][j].sections[k].blocks);
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Py_XDECREF(state->chunks[i][j].sections[k].data);
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Py_XDECREF(state->chunks[i][j].sections[k].skylight);
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Py_XDECREF(state->chunks[i][j].sections[k].blocklight);
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}
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state->chunks[i][j].loaded = 0;
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}
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}
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}
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}
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unsigned char
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check_adjacent_blocks(RenderState *state, int x,int y,int z, unsigned char blockid) {
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/*
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* Generates a pseudo ancillary data for blocks that depend of
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* what are surrounded and don't have ancillary data. This
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* function is used through generate_pseudo_data.
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*
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* This uses a binary number of 4 digits to encode the info:
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*
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* 0b1234:
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* Bit: 1 2 3 4
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* Side: +x +z -x -z
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* Values: bit = 0 -> The corresponding side block has different blockid
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* bit = 1 -> The corresponding side block has same blockid
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* Example: if the bit1 is 1 that means that there is a block with
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* blockid in the side of the +x direction.
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*/
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unsigned char pdata=0;
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if (get_data(state, BLOCKS, x + 1, y, z) == blockid) {
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pdata = pdata|(1 << 3);
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}
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if (get_data(state, BLOCKS, x, y, z + 1) == blockid) {
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pdata = pdata|(1 << 2);
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}
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if (get_data(state, BLOCKS, x - 1, y, z) == blockid) {
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pdata = pdata|(1 << 1);
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}
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if (get_data(state, BLOCKS, x, y, z - 1) == blockid) {
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pdata = pdata|(1 << 0);
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}
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return pdata;
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}
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unsigned char
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generate_pseudo_data(RenderState *state, unsigned char ancilData) {
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/*
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* Generates a fake ancillary data for blocks that are drawn
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* depending on what are surrounded.
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*/
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int x = state->x, y = state->y, z = state->z;
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unsigned char data = 0;
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if (state->block == 2) { /* grass */
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/* return 0x10 if grass is covered in snow */
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if (get_data(state, BLOCKS, x, y+1, z) == 78)
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return 0x10;
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return ancilData;
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} else if (state->block == 9) { /* water */
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/* an aditional bit for top is added to the 4 bits of check_adjacent_blocks */
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if (ancilData == 0) { /* static water */
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if (get_data(state, BLOCKS, x, y+1, z) == 9) {
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data = 0;
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} else {
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data = 16;
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}
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return data; /* = 0b10000 */
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} else if ((ancilData > 0) && (ancilData < 8)) { /* flowing water */
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data = (check_adjacent_blocks(state, x, y, z, state->block) ^ 0x0f) | 0x10;
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return data;
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} else if (ancilData >= 8) { /* falling water */
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data = (check_adjacent_blocks(state, x, y, z, state->block) ^ 0x0f);
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return data;
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}
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} else if ((state->block == 20) || (state->block == 79)) { /* glass and ice */
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/* an aditional bit for top is added to the 4 bits of check_adjacent_blocks */
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if (get_data(state, BLOCKS, x, y+1, z) == 20) {
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data = 0;
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} else {
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data = 16;
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}
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data = (check_adjacent_blocks(state, x, y, z, state->block) ^ 0x0f) | data;
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return data;
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} else if (state->block == 85) { /* fences */
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/* check for fences AND fence gates */
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return check_adjacent_blocks(state, x, y, z, state->block) | check_adjacent_blocks(state, x, y, z, 107);
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} else if (state->block == 55) { /* redstone */
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/* three addiotional bit are added, one for on/off state, and
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* another two for going-up redstone wire in the same block
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* (connection with the level y+1) */
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unsigned char above_level_data = 0, same_level_data = 0, below_level_data = 0, possibly_connected = 0, final_data = 0;
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/* check for air in y+1, no air = no connection with upper level */
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if (get_data(state, BLOCKS, x, y+1, z) == 0) {
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above_level_data = check_adjacent_blocks(state, x, y+1, z, state->block);
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} /* else above_level_data = 0 */
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/* check connection with same level */
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same_level_data = check_adjacent_blocks(state, x, y, z, 55);
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/* check the posibility of connection with y-1 level, check for air */
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possibly_connected = check_adjacent_blocks(state, x, y, z, 0);
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/* check connection with y-1 level */
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below_level_data = check_adjacent_blocks(state, x, y-1, z, state->block);
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final_data = above_level_data | same_level_data | (below_level_data & possibly_connected);
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/* add the three bits */
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if (ancilData > 0) { /* powered redstone wire */
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final_data = final_data | 0x40;
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}
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if ((above_level_data & 0x01)) { /* draw top left going up redstonewire */
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final_data = final_data | 0x20;
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}
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if ((above_level_data & 0x08)) { /* draw top right going up redstonewire */
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final_data = final_data | 0x10;
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}
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return final_data;
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} else if (state-> block == 54) { /* chests */
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/* the top 2 bits are used to store the type of chest
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* (single or double), the 2 bottom bits are used for
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* orientation, look textures.py for more information. */
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/* if placed alone chests always face west, return 0 to make a
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* chest facing west */
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unsigned char chest_data = 0, air_data = 0, final_data = 0;
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/* search for chests */
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chest_data = check_adjacent_blocks(state, x, y, z, 54);
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/* search for air */
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air_data = check_adjacent_blocks(state, x, y, z, 0);
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if (chest_data == 1) { /* another chest in the east */
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final_data = final_data | 0x8; /* only can face to north or south */
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if ( (air_data & 0x2) == 2 ) {
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final_data = final_data | 0x1; /* facing north */
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} else {
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final_data = final_data | 0x3; /* facing south */
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}
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} else if (chest_data == 2) { /* in the north */
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final_data = final_data | 0x4; /* only can face to east or west */
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if ( !((air_data & 0x4) == 4) ) { /* 0 = west */
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final_data = final_data | 0x2; /* facing east */
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}
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} else if (chest_data == 4) { /*in the west */
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final_data = final_data | 0x4;
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if ( (air_data & 0x2) == 2 ) {
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final_data = final_data | 0x1; /* facing north */
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} else {
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final_data = final_data | 0x3; /* facing south */
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}
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} else if (chest_data == 8) { /*in the south */
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final_data = final_data | 0x8;
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if ( !((air_data & 0x4) == 4) ) {
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final_data = final_data | 0x2; /* facing east */
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}
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} else if (chest_data == 0) {
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/* Single chest, determine the orientation */
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if ( ((air_data & 0x8) == 0) && ((air_data & 0x2) == 2) ) { /* block in +x and no block in -x */
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final_data = final_data | 0x1; /* facing north */
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} else if ( ((air_data & 0x2) == 0) && ((air_data & 0x8) == 8)) {
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final_data = final_data | 0x3;
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} else if ( ((air_data & 0x4) == 0) && ((air_data & 0x1) == 1)) {
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final_data = final_data | 0x2;
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} /* else, facing west, value = 0 */
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} else {
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/* more than one adjacent chests! render as normal chest */
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return 0;
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}
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return final_data;
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} else if ((state->block == 101) || (state->block == 102)) {
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/* iron bars and glass panes:
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* they seem to stick to almost everything but air, but
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* not sure yet! Still a TODO! */
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/* return check adjacent blocks with air, bit inverted */
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return check_adjacent_blocks(state, x, y, z, 0) ^ 0x0f;
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} else if ((state->block == 90) || (state->block == 113)) {
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/* portal and nether brick fences */
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return check_adjacent_blocks(state, x, y, z, state->block);
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} else if ((state->block == 64) || (state->block == 71)) {
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/* use bottom block data format plus one bit for top/down
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* block (0x8) and one bit for hinge position (0x10)
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*/
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unsigned char data = 0;
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if ((ancilData & 0x8) == 0x8) {
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/* top door block */
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unsigned char b_data = get_data(state, DATA, x, y-1, z);
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if ((ancilData & 0x1) == 0x1) {
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/* hinge on the left */
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data = b_data | 0x8 | 0x10;
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} else {
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data = b_data | 0x8;
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}
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} else {
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/* bottom door block */
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unsigned char t_data = get_data(state, DATA, x, y+1, z);
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if ((t_data & 0x1) == 0x1) {
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/* hinge on the left */
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data = ancilData | 0x10;
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} else {
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data = ancilData;
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}
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}
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return data;
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}
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return 0;
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}
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/* TODO triple check this to make sure reference counting is correct */
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PyObject*
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chunk_render(PyObject *self, PyObject *args) {
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RenderState state;
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PyObject *regionset;
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PyObject *modeobj;
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PyObject *blockmap;
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int xoff, yoff;
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PyObject *imgsize, *imgsize0_py, *imgsize1_py;
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int imgsize0, imgsize1;
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PyObject *blocks_py;
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PyObject *left_blocks_py;
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PyObject *right_blocks_py;
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PyObject *up_left_blocks_py;
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PyObject *up_right_blocks_py;
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RenderMode *rendermode;
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int i, j;
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PyObject *t = NULL;
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if (!PyArg_ParseTuple(args, "OiiiOiiOO", &state.regionset, &state.chunkx, &state.chunky, &state.chunkz, &state.img, &xoff, &yoff, &modeobj, &state.textures))
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return NULL;
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/* set up the render mode */
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state.rendermode = rendermode = render_mode_create(modeobj, &state);
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if (rendermode == NULL) {
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return NULL; // note that render_mode_create will
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// set PyErr. No need to set it here
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}
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/* get the blockmap from the textures object */
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blockmap = PyObject_GetAttrString(state.textures, "blockmap");
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if (blockmap == NULL) {
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render_mode_destroy(rendermode);
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return NULL;
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}
|
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if (blockmap == Py_None) {
|
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render_mode_destroy(rendermode);
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PyErr_SetString(PyExc_RuntimeError, "you must call Textures.generate()");
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return NULL;
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}
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|
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/* get the image size */
|
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imgsize = PyObject_GetAttrString(state.img, "size");
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imgsize0_py = PySequence_GetItem(imgsize, 0);
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imgsize1_py = PySequence_GetItem(imgsize, 1);
|
|
Py_DECREF(imgsize);
|
|
|
|
imgsize0 = PyInt_AsLong(imgsize0_py);
|
|
imgsize1 = PyInt_AsLong(imgsize1_py);
|
|
Py_DECREF(imgsize0_py);
|
|
Py_DECREF(imgsize1_py);
|
|
|
|
/* set all block data to unloaded */
|
|
for (i = 0; i < 3; i++) {
|
|
for (j = 0; j < 3; j++) {
|
|
state.chunks[i][j].loaded = 0;
|
|
}
|
|
}
|
|
|
|
/* get the block data for the center column, erroring out if needed */
|
|
if (load_chunk(&state, 0, 0, 1)) {
|
|
render_mode_destroy(rendermode);
|
|
Py_DECREF(blockmap);
|
|
return NULL;
|
|
}
|
|
if (state.chunks[1][1].sections[state.chunky].blocks == NULL) {
|
|
/* this section doesn't exist, let's skeddadle */
|
|
render_mode_destroy(rendermode);
|
|
Py_DECREF(blockmap);
|
|
unload_all_chunks(&state);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/* set blocks_py, state.blocks, and state.blockdatas as convenience */
|
|
blocks_py = state.blocks = state.chunks[1][1].sections[state.chunky].blocks;
|
|
state.blockdatas = state.chunks[1][1].sections[state.chunky].data;
|
|
|
|
/* set up the random number generator again for each chunk
|
|
so tallgrass is in the same place, no matter what mode is used */
|
|
srand(1);
|
|
|
|
for (state.x = 15; state.x > -1; state.x--) {
|
|
for (state.z = 0; state.z < 16; state.z++) {
|
|
|
|
/* set up the render coordinates */
|
|
state.imgx = xoff + state.x*12 + state.z*12;
|
|
/* 16*12 -- offset for y direction, 15*6 -- offset for x */
|
|
state.imgy = yoff - state.x*6 + state.z*6 + 16*12 + 15*6;
|
|
|
|
for (state.y = 0; state.y < 16; state.y++) {
|
|
unsigned char ancilData;
|
|
|
|
state.imgy -= 12;
|
|
|
|
/* get blockid */
|
|
state.block = getArrayShort3D(blocks_py, state.x, state.y, state.z);
|
|
if (state.block == 0 || render_mode_hidden(rendermode, state.x, state.y, state.z)) {
|
|
continue;
|
|
}
|
|
|
|
/* make sure we're rendering inside the image boundaries */
|
|
if ((state.imgx >= imgsize0 + 24) || (state.imgx <= -24)) {
|
|
continue;
|
|
}
|
|
if ((state.imgy >= imgsize1 + 24) || (state.imgy <= -24)) {
|
|
continue;
|
|
}
|
|
|
|
/* check for occlusion */
|
|
if (render_mode_occluded(rendermode, state.x, state.y, state.z)) {
|
|
continue;
|
|
}
|
|
|
|
/* everything stored here will be a borrowed ref */
|
|
|
|
if (block_has_property(state.block, NODATA)) {
|
|
/* block shouldn't have data associated with it, set it to 0 */
|
|
ancilData = 0;
|
|
state.block_data = 0;
|
|
state.block_pdata = 0;
|
|
} else {
|
|
/* block has associated data, use it */
|
|
ancilData = getArrayByte3D(state.blockdatas, state.x, state.y, state.z);
|
|
state.block_data = ancilData;
|
|
/* block that need pseudo ancildata:
|
|
* grass, water, glass, chest, restone wire,
|
|
* ice, fence, portal, iron bars, glass panes */
|
|
if ((state.block == 2) || (state.block == 9) ||
|
|
(state.block == 20) || (state.block == 54) ||
|
|
(state.block == 55) || (state.block == 64) ||
|
|
(state.block == 71) || (state.block == 79) ||
|
|
(state.block == 85) || (state.block == 90) ||
|
|
(state.block == 101) || (state.block == 102) ||
|
|
(state.block == 113)) {
|
|
ancilData = generate_pseudo_data(&state, ancilData);
|
|
state.block_pdata = ancilData;
|
|
} else {
|
|
state.block_pdata = 0;
|
|
}
|
|
}
|
|
|
|
/* make sure our block info is in-bounds */
|
|
if (state.block >= max_blockid || ancilData >= max_data)
|
|
continue;
|
|
|
|
/* get the texture */
|
|
t = PyList_GET_ITEM(blockmap, max_data * state.block + ancilData);
|
|
/* if we don't get a texture, try it again with 0 data */
|
|
if ((t == NULL || t == Py_None) && ancilData != 0)
|
|
t = PyList_GET_ITEM(blockmap, max_data * state.block);
|
|
|
|
/* if we found a proper texture, render it! */
|
|
if (t != NULL && t != Py_None)
|
|
{
|
|
PyObject *src, *mask, *mask_light;
|
|
int randx = 0, randy = 0;
|
|
src = PyTuple_GetItem(t, 0);
|
|
mask = PyTuple_GetItem(t, 0);
|
|
mask_light = PyTuple_GetItem(t, 1);
|
|
|
|
if (mask == Py_None)
|
|
mask = src;
|
|
|
|
if (state.block == 31) {
|
|
/* add a random offset to the postion of the tall grass to make it more wild */
|
|
randx = rand() % 6 + 1 - 3;
|
|
randy = rand() % 6 + 1 - 3;
|
|
state.imgx += randx;
|
|
state.imgy += randy;
|
|
}
|
|
|
|
render_mode_draw(rendermode, src, mask, mask_light);
|
|
|
|
if (state.block == 31) {
|
|
/* undo the random offsets */
|
|
state.imgx -= randx;
|
|
state.imgy -= randy;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* free up the rendermode info */
|
|
render_mode_destroy(rendermode);
|
|
|
|
Py_DECREF(blockmap);
|
|
unload_all_chunks(&state);
|
|
|
|
Py_RETURN_NONE;
|
|
}
|