src/mesa/main/glspirv.h

/*
 * Copyright 2017 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef GLSPIRV_H
#define GLSPIRV_H

#include "compiler/nir/nir.h"

#ifdef __cplusplus
extern "C" {
#endif

struct gl_shader_program;
struct gl_context;
struct gl_shader;

/**
 * A SPIR-V module contains the raw SPIR-V binary as set by ShaderBinary.
 *
 * It is reference-counted, because the same module can be attached to multiple
 * shader objects simultaneously.
 */
struct gl_spirv_module {
   unsigned RefCount;
   GLint Length;
   char Binary[0];
};

/**
 * SPIR-V data needed to compile and link a SPIR-V shader.
 *
 * It includes a SPIR-V binary that is potentially shared among different
 * shaders; and shader-specific specialization constants and entry point.
 *
 * It is reference-counted because it is shared between gl_shader and its
 * corresponding gl_linked_shader.
 */
struct gl_shader_spirv_data {
   GLint RefCount;

   struct gl_spirv_module *SpirVModule;

   GLchar *SpirVEntryPoint;

   GLuint NumSpecializationConstants;
   GLuint *SpecializationConstantsIndex;
   GLuint *SpecializationConstantsValue;
};

void
_mesa_spirv_module_reference(struct gl_spirv_module **dest,
                             struct gl_spirv_module *src);

void
_mesa_shader_spirv_data_reference(struct gl_shader_spirv_data **dest,
                                  struct gl_shader_spirv_data *src);

void
_mesa_spirv_shader_binary(struct gl_context *ctx,
                          unsigned n, struct gl_shader **shaders,
                          const void* binary, size_t length);

void
_mesa_spirv_link_shaders(struct gl_context *ctx,
                         struct gl_shader_program *prog);

nir_shader *
_mesa_spirv_to_nir(struct gl_context *ctx,
                   const struct gl_shader_program *prog,
                   gl_shader_stage stage,
                   const nir_shader_compiler_options *options);

/**
 * \name API functions
 */
/*@{*/

void GLAPIENTRY
_mesa_SpecializeShaderARB(GLuint shader,
                          const GLchar *pEntryPoint,
                          GLuint numSpecializationConstants,
                          const GLuint *pConstantIndex,
                          const GLuint *pConstantValue);

/*@}*/

#ifdef __cplusplus
}
#endif

#endif /* GLSPIRV_H */