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/*
* Copyright 2012 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
* 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.
*/
#include "ac_shader_util.h"
#include "sid.h"
unsigned
ac_get_spi_shader_z_format(bool writes_z, bool writes_stencil,
bool writes_samplemask)
{
if (writes_z) {
/* Z needs 32 bits. */
if (writes_samplemask)
return V_028710_SPI_SHADER_32_ABGR;
else if (writes_stencil)
return V_028710_SPI_SHADER_32_GR;
else
return V_028710_SPI_SHADER_32_R;
} else if (writes_stencil || writes_samplemask) {
/* Both stencil and sample mask need only 16 bits. */
return V_028710_SPI_SHADER_UINT16_ABGR;
} else {
return V_028710_SPI_SHADER_ZERO;
}
}
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