RetroArch/gfx/drivers_shader/slang_reflection.hpp
2016-09-11 15:07:07 +02:00

146 lines
4.2 KiB
C++

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2016 - 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 SLANG_REFLECTION_HPP
#define SLANG_REFLECTION_HPP
#include <string>
#include <unordered_map>
#include <stdint.h>
// Textures with built-in meaning.
enum slang_texture_semantic
{
// The input texture to the filter chain.
// Canonical name: "Original".
SLANG_TEXTURE_SEMANTIC_ORIGINAL = 0,
// The output from pass N - 1 if executing pass N, or ORIGINAL
// if pass #0 is executed.
// Canonical name: "Source".
SLANG_TEXTURE_SEMANTIC_SOURCE = 1,
// The original inputs with a history back in time.
// Canonical name: "OriginalHistory#", e.g. "OriginalHistory2" <- Two frames back.
// "OriginalHistory0" is an alias for SEMANTIC_ORIGINAL.
// Size name: "OriginalHistorySize#".
SLANG_TEXTURE_SEMANTIC_ORIGINAL_HISTORY = 2,
// The output from pass #N, where pass #0 is the first pass.
// Canonical name: "PassOutput#", e.g. "PassOutput3".
// Size name: "PassOutputSize#".
SLANG_TEXTURE_SEMANTIC_PASS_OUTPUT = 3,
// The output from pass #N, one frame ago where pass #0 is the first pass.
// It is not valid to use the pass feedback from a pass which is not offscreen.
// Canonical name: "PassFeedback#", e.g. "PassFeedback2".
SLANG_TEXTURE_SEMANTIC_PASS_FEEDBACK = 4,
// Inputs from static textures, defined by the user.
// There is no canonical name, and the only way to use these semantics are by
// remapping.
SLANG_TEXTURE_SEMANTIC_USER = 5,
SLANG_NUM_TEXTURE_SEMANTICS,
SLANG_INVALID_TEXTURE_SEMANTIC = -1
};
enum slang_semantic
{
// mat4, MVP
SLANG_SEMANTIC_MVP = 0,
// vec4, viewport size of current pass
SLANG_SEMANTIC_OUTPUT = 1,
// vec4, viewport size of final pass
SLANG_SEMANTIC_FINAL_VIEWPORT = 2,
// uint, frame count with modulo
SLANG_SEMANTIC_FRAME_COUNT = 3,
// float, user defined parameter, arrayed
SLANG_SEMANTIC_FLOAT_PARAMETER = 4,
SLANG_NUM_SEMANTICS,
SLANG_INVALID_SEMANTIC = -1
};
enum slang_stage
{
SLANG_STAGE_VERTEX_MASK = 1 << 0,
SLANG_STAGE_FRAGMENT_MASK = 1 << 1
};
/* Vulkan minimum limit. */
#define SLANG_NUM_BINDINGS 16
struct slang_texture_semantic_meta
{
size_t ubo_offset = 0;
size_t push_constant_offset = 0;
unsigned binding = 0;
uint32_t stage_mask = 0;
bool texture = false;
bool uniform = false;
bool push_constant = false;
};
struct slang_semantic_meta
{
size_t ubo_offset = 0;
size_t push_constant_offset = 0;
unsigned num_components = 0;
bool uniform = false;
bool push_constant = false;
};
struct slang_texture_semantic_map
{
slang_texture_semantic semantic;
unsigned index;
};
struct slang_semantic_map
{
slang_semantic semantic;
unsigned index;
};
struct slang_reflection
{
slang_reflection();
size_t ubo_size = 0;
size_t push_constant_size = 0;
unsigned ubo_binding = 0;
uint32_t ubo_stage_mask = 0;
uint32_t push_constant_stage_mask = 0;
std::vector<slang_texture_semantic_meta> semantic_textures[SLANG_NUM_TEXTURE_SEMANTICS];
slang_semantic_meta semantics[SLANG_NUM_SEMANTICS];
std::vector<slang_semantic_meta> semantic_float_parameters;
const std::unordered_map<std::string, slang_texture_semantic_map> *texture_semantic_map = nullptr;
const std::unordered_map<std::string, slang_texture_semantic_map> *texture_semantic_uniform_map = nullptr;
const std::unordered_map<std::string, slang_semantic_map> *semantic_map = nullptr;
unsigned pass_number = 0;
};
bool slang_reflect_spirv(const std::vector<uint32_t> &vertex,
const std::vector<uint32_t> &fragment,
slang_reflection *reflection);
#endif