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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,242 @@ | ||
| /* | ||
| * 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/>. | ||
| */ | ||
|
|
||
| #include "overlay.h" | ||
|
|
||
| typedef enum { false, true } bool; | ||
|
|
||
| typedef struct { | ||
| /* inherits from overlay */ | ||
| RenderPrimitiveOverlay parent; | ||
| void *structures; | ||
| int numcolors; | ||
| } RenderPrimitiveStructure; | ||
|
|
||
| struct Condition{ | ||
| int relx, rely, relz; | ||
| unsigned char block; | ||
| }; | ||
|
|
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| struct Color { | ||
| int numconds; | ||
| struct Condition *conditions; | ||
| unsigned char r, g, b, a; | ||
| }; | ||
|
|
||
| static void get_color(void *data, | ||
| RenderState *state, | ||
| unsigned char *r, | ||
| unsigned char *g, | ||
| unsigned char *b, | ||
| unsigned char *a) { | ||
| /** | ||
| * Calculate the color at the current position and store the values to r,g,b,a. | ||
| **/ | ||
| RenderPrimitiveStructure *self = (RenderPrimitiveStructure *)data; | ||
| int x = state->x, z = state->z, y_max, y, col, cond; | ||
| struct Color *structures = (struct Color *)(self->structures); | ||
| struct Condition * c = NULL; | ||
| bool all = true; | ||
| y_max = state->y + 1; | ||
|
|
||
| /** | ||
| * Check for every color in every y level if all its Conditions are met. | ||
| * If all conditions are met for one y level set r,b,g,a accordingly. | ||
| **/ | ||
| // iterate over all the colors | ||
| for ( col = 0; col < self->numcolors; col++) { | ||
| // iterate over all y levels | ||
| for (y = state->chunky * -16; y <= y_max; y++) { | ||
| // iterate over all the conditions | ||
| for (cond = 0; cond < structures[col].numconds; cond++) { | ||
| all = true; | ||
| c = (struct Condition *)&structures[col].conditions[cond]; | ||
| // check if the condition does apply and break from the conditions loop if not. | ||
| if(!(c->block == get_data(state, BLOCKS, x+c->relx, y+c->rely, z+c->relz))) { | ||
| all = false; | ||
| break; | ||
| } | ||
| } | ||
| if (all){ | ||
| // set the color | ||
| *r = structures[col].r; | ||
| *g = structures[col].g; | ||
| *b = structures[col].b; | ||
| *a = structures[col].a; | ||
| return; | ||
| } | ||
| } | ||
| } | ||
| return; | ||
| } | ||
|
|
||
| static int overlay_structure_start(void *data, RenderState *state, PyObject *support) { | ||
| /** | ||
| * Initializing the search for structures by parsing the arguments and storing them into | ||
| * appropriate structures. If no arguments are passed create and use default values. | ||
| **/ | ||
| PyObject *opt; | ||
| RenderPrimitiveStructure* self; | ||
|
|
||
| /* first, chain up */ | ||
| int ret = primitive_overlay.start(data, state, support); | ||
| if (ret != 0) | ||
| return ret; | ||
|
|
||
| /* now do custom initializations */ | ||
| self = (RenderPrimitiveStructure *)data; | ||
|
|
||
| // opt is a borrowed reference. do not deref | ||
| // store the structures python object into opt. | ||
| if (!render_mode_parse_option(support, "structures", "O", &(opt))) | ||
| return 1; | ||
|
|
||
| /** | ||
| * Check if a sane option was passed. | ||
| **/ | ||
| if (opt && opt != Py_None) { | ||
| struct Color *structures = NULL; | ||
| struct Condition *cond = NULL; | ||
| Py_ssize_t structures_size = 0, i, cond_size = 0, n = 0; | ||
| bool cont = true; | ||
|
|
||
| opt = PySequence_Fast(opt, "expected a sequence"); | ||
| if (!opt) { | ||
| PyErr_SetString(PyExc_TypeError, "'structures' must be a a sequence"); | ||
| return 1; | ||
| } | ||
|
|
||
| structures_size = PySequence_Fast_GET_SIZE(opt); | ||
| // Getting space on the heap and do not forget to set self->numcolors. | ||
| structures = self->structures = calloc(structures_size, sizeof(struct Color)); | ||
| self->numcolors = structures_size; | ||
| if (structures == NULL) { | ||
| PyErr_SetString(PyExc_MemoryError, "failed to allocate memory"); | ||
| return 1; | ||
| } | ||
|
|
||
| /** | ||
| * Try to parse the definitions of conditions and colors. | ||
| **/ | ||
| if (cont) { | ||
| for (i = 0; i < structures_size; i++) { | ||
| PyObject *structure = PyList_GET_ITEM(opt, i); | ||
| // condspy holding the conditions tuple of variable length (python object) | ||
| PyObject *condspy; | ||
| // colorpy holding the 4 tuple with r g b a values of the color | ||
| PyObject *colorpy; | ||
|
|
||
| // getting the condspy and colorpy out of the structures. | ||
| if (!PyArg_ParseTuple(structure, "OO", &condspy, &colorpy)) { | ||
| // Exception set automatically | ||
| free(structures); | ||
| self->structures = NULL; | ||
| return 1; | ||
| } | ||
|
|
||
| // Parse colorpy into a c-struct. | ||
| if (!PyArg_ParseTuple( colorpy, "bbbb", | ||
| &structures[i].r, | ||
| &structures[i].g, | ||
| &structures[i].b, | ||
| &structures[i].a)) { | ||
| free(structures); | ||
| self->structures = NULL; | ||
| return 1; | ||
| } | ||
|
|
||
| // Convert condspy to a fast sequence | ||
| condspy = PySequence_Fast(condspy, "Failed to parse conditions"); | ||
| if(condspy == NULL) { | ||
| free(structures); | ||
| self->structures = NULL; | ||
| return 1; | ||
| } | ||
|
|
||
| // get the number of conditions. | ||
| structures[i].numconds = PySequence_Fast_GET_SIZE(condspy); | ||
| // reserve enough memory for the conditions. | ||
| cond = calloc(structures[i].numconds, sizeof(struct Condition)); | ||
| structures[i].conditions = cond; | ||
|
|
||
| if (structures[i].conditions == NULL) { | ||
| PyErr_SetString(PyExc_MemoryError, "failed to allocate memory"); | ||
| free(structures); | ||
| self->structures = NULL; | ||
| return 1; | ||
| } | ||
|
|
||
| // iterate over all the conditions and read them. | ||
| for (n = 0; n < structures[i].numconds; n++) { | ||
| PyObject *ccond = PySequence_Fast_GET_ITEM(condspy, n); | ||
| if(!PyArg_ParseTuple( ccond, "iiib", | ||
| &cond[n].relx, | ||
| &cond[n].rely, | ||
| &cond[n].relz, | ||
| &cond[n].block)){ | ||
| int x = 0; | ||
| for(x = 0; x < structures_size; x++){ | ||
| free(structures[x].conditions); | ||
| } | ||
| free(structures); | ||
| self->structures = NULL; | ||
| return 1; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /* setup custom color */ | ||
| self->parent.get_color = get_color; | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| static void overlay_structure_finish(void *data, RenderState *state) { | ||
| /* first free all *our* stuff */ | ||
| RenderPrimitiveStructure* self = (RenderPrimitiveStructure *)data; | ||
| int i = 0; | ||
|
|
||
| if(self->structures) { | ||
| // freeing the nested structure | ||
| struct Color * m = self->structures; | ||
| for(i = 0; i < self->numcolors; i++){ | ||
| if(m[i].conditions) | ||
| free(m[i].conditions); | ||
| } | ||
| } | ||
|
|
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| if (self->structures) { | ||
| free(self->structures); | ||
| self->structures = NULL; | ||
| } | ||
|
|
||
| /* now, chain up */ | ||
| primitive_overlay.finish(data, state); | ||
| } | ||
|
|
||
| RenderPrimitiveInterface primitive_overlay_structure = { | ||
| "overlay-structure", | ||
| sizeof(RenderPrimitiveStructure), | ||
| overlay_structure_start, | ||
| overlay_structure_finish, | ||
| NULL, | ||
| NULL, | ||
| overlay_draw, | ||
| }; | ||
|
|