mirror of
https://github.com/mpv-player/mpv
synced 2024-12-26 00:42:57 +00:00
ae1c489b31
This commit essentially makes user shader able to fix offset (produced by other prescaler, for example) like builtin `--scale`.
100 lines
3.0 KiB
C
100 lines
3.0 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 "utils.h"
|
|
#include "ra.h"
|
|
|
|
#define SHADER_MAX_HOOKS 16
|
|
#define SHADER_MAX_BINDS 16
|
|
#define MAX_SZEXP_SIZE 32
|
|
|
|
enum szexp_op {
|
|
SZEXP_OP_ADD,
|
|
SZEXP_OP_SUB,
|
|
SZEXP_OP_MUL,
|
|
SZEXP_OP_DIV,
|
|
SZEXP_OP_MOD,
|
|
SZEXP_OP_NOT,
|
|
SZEXP_OP_GT,
|
|
SZEXP_OP_LT,
|
|
SZEXP_OP_EQ,
|
|
};
|
|
|
|
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 compute_info {
|
|
bool active;
|
|
int block_w, block_h; // Block size (each block corresponds to one WG)
|
|
int threads_w, threads_h; // How many threads form a working group
|
|
bool directly_writes; // If true, shader is assumed to imageStore(out_image)
|
|
};
|
|
|
|
struct gl_user_shader_hook {
|
|
struct bstr pass_desc;
|
|
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;
|
|
bool align_offset;
|
|
struct szexp width[MAX_SZEXP_SIZE];
|
|
struct szexp height[MAX_SZEXP_SIZE];
|
|
struct szexp cond[MAX_SZEXP_SIZE];
|
|
int components;
|
|
struct compute_info compute;
|
|
};
|
|
|
|
struct gl_user_shader_tex {
|
|
struct bstr name;
|
|
struct ra_tex_params params;
|
|
// for video.c
|
|
struct ra_tex *tex;
|
|
};
|
|
|
|
// Parse the next shader block from `body`. The callbacks are invoked on every
|
|
// valid shader block parsed.
|
|
void parse_user_shader(struct mp_log *log, struct ra *ra, struct bstr shader,
|
|
void *priv,
|
|
bool (*dohook)(void *p, struct gl_user_shader_hook hook),
|
|
bool (*dotex)(void *p, struct gl_user_shader_tex tex));
|
|
|
|
// 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
|