/* qbism.h
 *
 * Copyright (C) 2005 by Andy Goth <unununium@openverse.com>.
 *
 * This program 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 2 of the License, or (at your option)
 * any later version.
 *
 * This program 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
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA. */

#include <stdio.h>

/* All suppoted transformation operations. */
typedef enum {
    XOP_PROJECTION,
    XOP_SHIFT,
    XOP_SHIFTBACK,
    XOP_ROTATE,
    XOP_ROTATE2,
    XOP_MULTIPLY,
    XOP_SINE,
    XOP_CONDITIONAL,
    XOP_COMPLEMENT,
    XOP_COUNT
} xform_op_t;

/* A single transformation instruction. */
typedef struct {
    xform_op_t opcode;          /* Operation to perform.                    */
    int source;                 /* Index of the source register.            */
    int control;                /* Index of the control register.           */
    int dest;                   /* Index of the destination register.       */
} xform_t;

/* A sequence of transformation instructions. */
typedef struct {
    xform_t* seq;               /* The sequence of instructions.            */
    int num_steps;              /* Number of instructions in the sequence.  */
    int num_regs;               /* Number of registers needed.              */
} algo_t;

/* A register.  Consists of red, green, and blue channels. */
typedef float reg_t[3];

/* Function prototypes. */
void* xmalloc(size_t bytes);
void* xrealloc(void* buf, size_t bytes);
void algo_read_qbe(algo_t* algo, FILE* in);
void algo_write_qbe(algo_t* algo, FILE* out);
void qbism_render(algo_t* algo, int width, int height, int oversample,
        FILE* out);

/* vim: set ts=4 sts=4 sw=4 tw=80 et: */