mirror of https://github.com/mpv-player/mpv
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
|
|
* This file is part of mpv.
|
|
*
|
|
* mpv is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* mpv 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef MP_GL_USER_SHADERS_H
|
|
#define MP_GL_USER_SHADERS_H
|
|
|
|
#include "common.h"
|
|
#include "utils.h"
|
|
|
|
#define SHADER_API 1
|
|
#define SHADER_MAX_HOOKS 16
|
|
#define SHADER_MAX_BINDS 6
|
|
#define MAX_SZEXP_SIZE 32
|
|
|
|
enum szexp_op {
|
|
SZEXP_OP_ADD,
|
|
SZEXP_OP_SUB,
|
|
SZEXP_OP_MUL,
|
|
SZEXP_OP_DIV,
|
|
SZEXP_OP_NOT,
|
|
SZEXP_OP_GT,
|
|
SZEXP_OP_LT,
|
|
};
|
|
|
|
enum szexp_tag {
|
|
SZEXP_END = 0, // End of an RPN expression
|
|
SZEXP_CONST, // Push a constant value onto the stack
|
|
SZEXP_VAR_W, // Get the width/height of a named texture (variable)
|
|
SZEXP_VAR_H,
|
|
SZEXP_OP2, // Pop two elements and push the result of a dyadic operation
|
|
SZEXP_OP1, // Pop one element and push the result of a monadic operation
|
|
};
|
|
|
|
struct szexp {
|
|
enum szexp_tag tag;
|
|
union {
|
|
float cval;
|
|
struct bstr varname;
|
|
enum szexp_op op;
|
|
} val;
|
|
};
|
|
|
|
struct gl_user_shader {
|
|
struct bstr hook_tex[SHADER_MAX_HOOKS];
|
|
struct bstr bind_tex[SHADER_MAX_BINDS];
|
|
struct bstr save_tex;
|
|
struct bstr pass_body;
|
|
struct gl_transform offset;
|
|
struct szexp width[MAX_SZEXP_SIZE];
|
|
struct szexp height[MAX_SZEXP_SIZE];
|
|
struct szexp cond[MAX_SZEXP_SIZE];
|
|
int components;
|
|
};
|
|
|
|
// Parse the next shader pass from 'body'. Returns false if the end of the
|
|
// string was reached
|
|
bool parse_user_shader_pass(struct mp_log *log, struct bstr *body,
|
|
struct gl_user_shader *out);
|
|
|
|
// Evaluate a szexp, given a lookup function for named textures
|
|
bool eval_szexpr(struct mp_log *log, void *priv,
|
|
bool (*lookup)(void *priv, struct bstr var, float size[2]),
|
|
struct szexp expr[MAX_SZEXP_SIZE], float *result);
|
|
|
|
#endif
|