1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2004 the VideoLAN team
7 * Authors: Cyril Deguet <asmax@videolan.org>
8 * code from projectM http://xmms-projectm.sourceforge.net
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
32 #include "expr_types.h"
35 #include "splaytree_types.h"
36 #include "splaytree.h"
38 #include "param_types.h"
41 #include "per_pixel_eqn.h"
42 #include "per_pixel_eqn_types.h"
44 #include "engine_vars.h"
47 extern preset_t * active_preset;
54 /* Evaluates a per pixel equation */
55 void evalPerPixelEqn(per_pixel_eqn_t * per_pixel_eqn) {
57 double ** param_matrix = NULL;
58 gen_expr_t * eqn_ptr = NULL;
61 eqn_ptr = per_pixel_eqn->gen_expr;
62 if (per_pixel_eqn->param->matrix == NULL) {
63 if (PER_PIXEL_EQN_DEBUG) printf("evalPerPixelEqn: [begin initializing matrix] (index = %d) (name = %s)\n",
64 per_pixel_eqn->index, per_pixel_eqn->param->name);
66 param_matrix = per_pixel_eqn->param->matrix = (double**)malloc(gx*sizeof(double*));
68 for(x = 0; x < gx; x++)
69 param_matrix[x] = (double *)malloc(gy * sizeof(double));
71 for (x = 0; x < gx; x++)
72 for (y = 0; y < gy; y++)
73 param_matrix[x][y] = 0.0;
75 if (per_pixel_eqn->param->name == NULL)
76 printf("null parameter?\n");
78 // printf("PARAM MATRIX: \"%s\" initialized.\n", per_pixel_eqn->param->name);
81 param_matrix = (double**)per_pixel_eqn->param->matrix;
84 printf("something is seriously wrong...\n");
85 for (mesh_i = 0; mesh_i < gx; mesh_i++) {
86 for (mesh_j = 0; mesh_j < gy; mesh_j++) {
87 param_matrix[mesh_i][mesh_j] = eval_gen_expr(eqn_ptr);
91 /* Now that this parameter has been referenced with a per
92 pixel equation, we let the evaluator know by setting
94 per_pixel_eqn->param->matrix_flag = 1;
97 void evalPerPixelEqns() {
99 /* Evaluate all per pixel equations using splay traversal */
100 splay_traverse(evalPerPixelEqn, active_preset->per_pixel_eqn_tree);
102 /* Set mesh i / j values to -1 so engine vars are used by default again */
103 mesh_i = mesh_j = -1;
106 /* Adds a per pixel equation according to its string name. This
107 will be used only by the parser */
109 int add_per_pixel_eqn(char * name, gen_expr_t * gen_expr, preset_t * preset) {
111 per_pixel_eqn_t * per_pixel_eqn;
113 param_t * param = NULL;
115 /* Argument checks */
118 if (gen_expr == NULL)
123 if (PER_PIXEL_EQN_DEBUG) printf("add_per_pixel_eqn: per pixel equation (name = \"%s\")\n", name);
125 if (!strncmp(name, "dx", strlen("dx")))
126 preset->per_pixel_flag[DX_OP] = TRUE;
127 else if (!strncmp(name, "dy", strlen("dy")))
128 preset->per_pixel_flag[DY_OP] = TRUE;
129 else if (!strncmp(name, "cx", strlen("cx")))
130 preset->per_pixel_flag[CX_OP] = TRUE;
131 else if (!strncmp(name, "cy", strlen("cy")))
132 preset->per_pixel_flag[CX_OP] = TRUE;
133 else if (!strncmp(name, "zoom", strlen("zoom")))
134 preset->per_pixel_flag[ZOOM_OP] = TRUE;
135 else if (!strncmp(name, "zoomexp", strlen("zoomexp")))
136 preset->per_pixel_flag[ZOOMEXP_OP] = TRUE;
137 else if (!strncmp(name, "rot", strlen("rot")))
138 preset->per_pixel_flag[ROT_OP] = TRUE;
139 else if (!strncmp(name, "sx", strlen("sx")))
140 preset->per_pixel_flag[SX_OP] = TRUE;
141 else if (!strncmp(name, "sy", strlen("sy")))
142 preset->per_pixel_flag[SY_OP] = TRUE;
145 /* Search for the parameter so we know what matrix the per pixel equation is referencing */
147 if ((param = find_param(name, preset, TRUE)) == NULL) {
148 if (PER_PIXEL_EQN_DEBUG) printf("add_per_pixel_eqn: failed to allocate a new parameter!\n");
153 /* Find most largest index in the splaytree */
154 // if ((per_pixel_eqn = splay_find_max(active_preset->per_pixel_eqn_tree)) == NULL)
157 index = splay_size(preset->per_pixel_eqn_tree);
159 /* Create the per pixel equation given the index, parameter, and general expression */
160 if ((per_pixel_eqn = new_per_pixel_eqn(index, param, gen_expr)) == NULL) {
161 if (PER_PIXEL_EQN_DEBUG) printf("add_per_pixel_eqn: failed to create new per pixel equation!\n");
166 if (PER_PIXEL_EQN_DEBUG) printf("add_per_pixel_eqn: new equation (index = %d) (param = \"%s\")\n",
167 per_pixel_eqn->index, per_pixel_eqn->param->name);
168 /* Insert the per pixel equation into the preset per pixel database */
169 if (splay_insert(per_pixel_eqn, &per_pixel_eqn->index, preset->per_pixel_eqn_tree) < 0) {
170 free_per_pixel_eqn(per_pixel_eqn);
171 printf("failed to add per pixel eqn!\n");
179 per_pixel_eqn_t * new_per_pixel_eqn(int index, param_t * param, gen_expr_t * gen_expr) {
181 per_pixel_eqn_t * per_pixel_eqn;
187 if (gen_expr == NULL)
190 if ((per_pixel_eqn = (per_pixel_eqn_t*)malloc(sizeof(per_pixel_eqn_t))) == NULL)
194 per_pixel_eqn->index = index;
195 per_pixel_eqn->param = param;
196 per_pixel_eqn->gen_expr = gen_expr;
198 return per_pixel_eqn;
202 void free_per_pixel_eqn(per_pixel_eqn_t * per_pixel_eqn) {
204 if (per_pixel_eqn == NULL)
207 free_gen_expr(per_pixel_eqn->gen_expr);
214 static inline int resetPerPixelEqnFlags(preset_t * preset) {
217 for (i = 0; i < NUM_OPS;i++)
218 preset->per_pixel_flag[i] = FALSE;