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/*
* Copyright © 2011 Marek Olšák <maraeo@gmail.com>
*
* 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.
*/
/**
* \file barrier.c
* Implementation of various pipeline barrier entry points.
*
* \author Marek Olšák <maraeo@gmail.com>
*/
#include "context.h"
#include "barrier.h"
static void
_mesa_texture_barrier(struct gl_context *ctx)
{
/* no-op */
}
void
_mesa_init_barrier_functions(struct dd_function_table *driver)
{
driver->TextureBarrier = _mesa_texture_barrier;
}
void GLAPIENTRY
_mesa_TextureBarrierNV(void)
{
GET_CURRENT_CONTEXT(ctx);
if (!ctx->Extensions.NV_texture_barrier) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glTextureBarrier(not supported)");
return;
}
ctx->Driver.TextureBarrier(ctx);
}
void GLAPIENTRY
_mesa_MemoryBarrier(GLbitfield barriers)
{
GET_CURRENT_CONTEXT(ctx);
if (ctx->Driver.MemoryBarrier)
ctx->Driver.MemoryBarrier(ctx, barriers);
}
void GLAPIENTRY
_mesa_MemoryBarrierByRegion(GLbitfield barriers)
{
GET_CURRENT_CONTEXT(ctx);
GLbitfield all_allowed_bits = GL_ATOMIC_COUNTER_BARRIER_BIT |
GL_FRAMEBUFFER_BARRIER_BIT |
GL_SHADER_IMAGE_ACCESS_BARRIER_BIT |
GL_SHADER_STORAGE_BARRIER_BIT |
GL_TEXTURE_FETCH_BARRIER_BIT |
GL_UNIFORM_BARRIER_BIT;
if (ctx->Driver.MemoryBarrier) {
/* From section 7.11.2 of the OpenGL ES 3.1 specification:
*
* "When barriers is ALL_BARRIER_BITS, shader memory accesses will be
* synchronized relative to all these barrier bits, but not to other
* barrier bits specific to MemoryBarrier."
*
* That is, if barriers is the special value GL_ALL_BARRIER_BITS, then all
* barriers allowed by glMemoryBarrierByRegion should be activated."
*/
if (barriers == GL_ALL_BARRIER_BITS) {
ctx->Driver.MemoryBarrier(ctx, all_allowed_bits);
return;
}
/* From section 7.11.2 of the OpenGL ES 3.1 specification:
*
* "An INVALID_VALUE error is generated if barriers is not the special
* value ALL_BARRIER_BITS, and has any bits set other than those
* described above."
*/
if ((barriers & ~all_allowed_bits) != 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glMemoryBarrierByRegion(unsupported barrier bit");
}
ctx->Driver.MemoryBarrier(ctx, barriers);
}
}
void GLAPIENTRY
_mesa_BlendBarrier(void)
{
GET_CURRENT_CONTEXT(ctx);
if (!ctx->Extensions.MESA_shader_framebuffer_fetch_non_coherent &&
!ctx->Extensions.KHR_blend_equation_advanced) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBlendBarrier(not supported)");
return;
}
ctx->Driver.BlendBarrier(ctx);
}
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