glslang_util.h

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/* RetroArch - A frontend for libretro.
 * Copyright (C) 2010-2017 - Hans-Kristian Arntzen
 * 
 * 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 GLSLANG_UTIL_HPP
#define GLSLANG_UTIL_HPP

#include <stdint.h>
#include <retro_common_api.h>

typedef enum glslang_format
{
 SLANG_FORMAT_UNKNOWN = 0,

 /* 8-bit */
 SLANG_FORMAT_R8_UNORM,
 SLANG_FORMAT_R8_UINT,
 SLANG_FORMAT_R8_SINT,
 SLANG_FORMAT_R8G8_UNORM,
 SLANG_FORMAT_R8G8_UINT,
 SLANG_FORMAT_R8G8_SINT,
 SLANG_FORMAT_R8G8B8A8_UNORM,
 SLANG_FORMAT_R8G8B8A8_UINT,
 SLANG_FORMAT_R8G8B8A8_SINT,
 SLANG_FORMAT_R8G8B8A8_SRGB,

 /* 10-bit */
 SLANG_FORMAT_A2B10G10R10_UNORM_PACK32,
 SLANG_FORMAT_A2B10G10R10_UINT_PACK32,

 /* 16-bit */
 SLANG_FORMAT_R16_UINT,
 SLANG_FORMAT_R16_SINT,
 SLANG_FORMAT_R16_SFLOAT,
 SLANG_FORMAT_R16G16_UINT,
 SLANG_FORMAT_R16G16_SINT,
 SLANG_FORMAT_R16G16_SFLOAT,
 SLANG_FORMAT_R16G16B16A16_UINT,
 SLANG_FORMAT_R16G16B16A16_SINT,
 SLANG_FORMAT_R16G16B16A16_SFLOAT,

 /* 32-bit */
 SLANG_FORMAT_R32_UINT,
 SLANG_FORMAT_R32_SINT,
 SLANG_FORMAT_R32_SFLOAT,
 SLANG_FORMAT_R32G32_UINT,
 SLANG_FORMAT_R32G32_SINT,
 SLANG_FORMAT_R32G32_SFLOAT,
 SLANG_FORMAT_R32G32B32A32_UINT,
 SLANG_FORMAT_R32G32B32A32_SINT,
 SLANG_FORMAT_R32G32B32A32_SFLOAT,

 SLANG_FORMAT_MAX
}glslang_format;

RETRO_BEGIN_DECLS

const char *glslang_format_to_string(glslang_format fmt);

RETRO_END_DECLS

#ifdef __cplusplus
#include <vector>
#include <string>

struct glslang_parameter
{
 std::string id;
 std::string desc;
 float initial;
 float minimum;
 float maximum;
 float step;
};

struct glslang_meta
{
 std::vector<glslang_parameter> parameters;
 std::string name;
 glslang_format rt_format;

 glslang_meta()
 {
 rt_format = SLANG_FORMAT_UNKNOWN;
 }
};

struct glslang_output
{
 std::vector<uint32_t> vertex;
 std::vector<uint32_t> fragment;
 glslang_meta meta;
};

bool glslang_compile_shader(const char *shader_path, glslang_output *output);

/* Helpers for internal use. */
bool glslang_read_shader_file(const char *path, std::vector<std::string> *output, bool root_file);
bool glslang_parse_meta(const std::vector<std::string> &lines, glslang_meta *meta);
#endif

#endif