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/*
* Copyright 2013 Intel Corporation
*
* 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
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Francisco Jerez <currojerez@riseup.net>
*/
#ifndef SHADERIMAGE_H
#define SHADERIMAGE_H
#include "glheader.h"
#include "formats.h"
#ifdef __cplusplus
extern "C" {
#endif
struct gl_context;
/**
* Get the matching mesa_format for a shader image format GL enum.
*/
mesa_format
_mesa_get_shader_image_format(GLenum format);
/**
* Get a single image unit struct with the default state.
*/
struct gl_image_unit
_mesa_default_image_unit(struct gl_context *ctx);
/**
* Initialize a context's shader image units to the default state.
*/
void
_mesa_init_image_units(struct gl_context *ctx);
/**
* Return GL_TRUE if the state of the image unit passed as argument is valid
* and access from the shader is allowed. Otherwise loads from this unit
* should return zero and stores should have no effect.
*
* The result depends on context state other than the passed image unit, part
* of the _NEW_TEXTURE set.
*/
GLboolean
_mesa_is_image_unit_valid(struct gl_context *ctx, struct gl_image_unit *u);
/**
* Recalculate the \c _Valid flag of a context's shader image units.
*
* To be called when the state of any texture bound to an image unit
* changes.
*/
void
_mesa_validate_image_units(struct gl_context *ctx);
void GLAPIENTRY
_mesa_BindImageTexture(GLuint unit, GLuint texture, GLint level,
GLboolean layered, GLint layer, GLenum access,
GLenum format);
void GLAPIENTRY
_mesa_BindImageTextures(GLuint first, GLsizei count, const GLuint *textures);
void GLAPIENTRY
_mesa_MemoryBarrier(GLbitfield barriers);
void GLAPIENTRY
_mesa_MemoryBarrierByRegion(GLbitfield barriers);
#ifdef __cplusplus
}
#endif
#endif
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