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-rw-r--r--video/out/opengl/user_shaders.h74
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diff --git a/video/out/opengl/user_shaders.h b/video/out/opengl/user_shaders.h
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+/*
+ * 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);
+
+#endif