RetroArch/gfx/video_shader_parse.h

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/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2015 - Daniel De Matteis
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __VIDEO_SHADER_PARSE_H
#define __VIDEO_SHADER_PARSE_H
#include <boolean.h>
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#include <file/config_file.h>
#include "video_state_tracker.h"
#include <retro_miscellaneous.h>
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#ifdef __cplusplus
extern "C" {
#endif
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#ifndef GFX_MAX_SHADERS
#define GFX_MAX_SHADERS 16
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#endif
#ifndef GFX_MAX_TEXTURES
#define GFX_MAX_TEXTURES 8
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#endif
#ifndef GFX_MAX_VARIABLES
#define GFX_MAX_VARIABLES 64
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#endif
#ifndef GFX_MAX_PARAMETERS
#define GFX_MAX_PARAMETERS 64
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#endif
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enum rarch_shader_type
{
RARCH_SHADER_NONE = 0,
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RARCH_SHADER_CG,
RARCH_SHADER_HLSL,
RARCH_SHADER_GLSL
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};
enum gfx_scale_type
{
RARCH_SCALE_INPUT = 0,
RARCH_SCALE_ABSOLUTE,
RARCH_SCALE_VIEWPORT
};
enum
{
RARCH_FILTER_UNSPEC = 0,
RARCH_FILTER_LINEAR,
RARCH_FILTER_NEAREST
};
enum gfx_wrap_type
{
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RARCH_WRAP_BORDER = 0, /* Kinda deprecated, but keep as default.
Will be translated to EDGE in GLES. */
RARCH_WRAP_DEFAULT = RARCH_WRAP_BORDER,
RARCH_WRAP_EDGE,
RARCH_WRAP_REPEAT,
RARCH_WRAP_MIRRORED_REPEAT
};
struct gfx_fbo_scale
{
enum gfx_scale_type type_x;
enum gfx_scale_type type_y;
float scale_x;
float scale_y;
unsigned abs_x;
unsigned abs_y;
bool fp_fbo;
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bool srgb_fbo;
bool valid;
};
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struct gfx_shader_parameter
{
char id[64];
char desc[64];
float current;
float minimum;
float initial;
float maximum;
float step;
};
struct gfx_shader_pass
{
struct
{
char path[PATH_MAX_LENGTH];
struct
{
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char *vertex; /* Dynamically allocated. Must be free'd. */
char *fragment; /* Dynamically allocated. Must be free'd. */
} string;
} source;
char alias[64];
struct gfx_fbo_scale fbo;
unsigned filter;
enum gfx_wrap_type wrap;
unsigned frame_count_mod;
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bool mipmap;
};
struct gfx_shader_lut
{
char id[64];
char path[PATH_MAX_LENGTH];
unsigned filter;
enum gfx_wrap_type wrap;
bool mipmap;
};
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/* This is pretty big, shouldn't be put on the stack.
* Avoid lots of allocation for convenience. */
struct gfx_shader
{
enum rarch_shader_type type;
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bool modern; /* Only used for XML shaders. */
char prefix[64];
unsigned passes;
struct gfx_shader_pass pass[GFX_MAX_SHADERS];
unsigned luts;
struct gfx_shader_lut lut[GFX_MAX_TEXTURES];
struct gfx_shader_parameter parameters[GFX_MAX_PARAMETERS];
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unsigned num_parameters;
unsigned variables;
struct state_tracker_uniform_info variable[GFX_MAX_VARIABLES];
char script_path[PATH_MAX_LENGTH];
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char *script; /* Dynamically allocated. Must be free'd. Only used by XML. */
char script_class[512];
};
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/**
* video_shader_read_conf_cgp:
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* @conf : Preset file to read from.
* @shader : Shader passes handle.
*
* Loads preset file and all associated state (passes,
* textures, imports, etc).
*
* Returns: true (1) if successful, otherwise false (0).
**/
bool video_shader_read_conf_cgp(config_file_t *conf,
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struct gfx_shader *shader);
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/**
* video_shader_write_conf_cgp:
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* @conf : Preset file to read from.
* @shader : Shader passes handle.
*
* Saves preset and all associated state (passes,
* textures, imports, etc) to disk.
**/
void video_shader_write_conf_cgp(config_file_t *conf,
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struct gfx_shader *shader);
/**
* video_shader_resolve_relative:
* @shader : Shader pass handle.
* @ref_path : Relative shader path.
*
* Resolves relative shader path (@ref_path) into absolute
* shader paths.
**/
void video_shader_resolve_relative(struct gfx_shader *shader,
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const char *ref_path);
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/**
* video_shader_resolve_parameters:
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* @conf : Preset file to read from.
* @shader : Shader passes handle.
*
* Resolves all shader parameters belonging to shaders.
*
* Returns: true (1) if successful, otherwise false (0).
**/
bool video_shader_resolve_parameters(config_file_t *conf,
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struct gfx_shader *shader);
/**
* video_shader_parse_type:
* @path : Shader path.
* @fallback : Fallback shader type in case no
* type could be found.
*
* Parses type of shader.
*
* Returns: value of shader type on success, otherwise will return
* user-supplied @fallback value.
**/
enum rarch_shader_type video_shader_parse_type(const char *path,
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enum rarch_shader_type fallback);
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#ifdef __cplusplus
}
#endif
#endif