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/*
* Mesa 3-D graphics library
*
* Copyright (C) 2012-2013 LunarG, 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 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:
* Chia-I Wu <olv@lunarg.com>
*/
#ifndef ILO_FORMAT_H
#define ILO_FORMAT_H
#include "brw_defines.h"
#include "ilo_common.h"
struct ilo_screen;
void
ilo_init_format_functions(struct ilo_screen *is);
int
ilo_translate_color_format(enum pipe_format format);
/**
* Translate a pipe format to a hardware surface format suitable for
* the given purpose. Return -1 on errors.
*
* This is an inline function not only for performance reasons. There are
* caveats that the callers should that before calling this function.
*/
static inline int
ilo_translate_format(enum pipe_format format, unsigned bind)
{
switch (bind) {
case PIPE_BIND_RENDER_TARGET:
/*
* Some RGBX formats are not supported as render target formats. But we
* can use their RGBA counterparts and force the destination alpha to be
* one when blending is enabled.
*/
switch (format) {
case PIPE_FORMAT_B8G8R8X8_UNORM:
return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
default:
return ilo_translate_color_format(format);
}
break;
case PIPE_BIND_SAMPLER_VIEW:
/*
* For depth formats, we want the depth values to be returned as R
* values. But we assume in many places that the depth values are
* returned as I values (util_make_fragment_tex_shader_writedepth() is
* one such example). We have to live with that at least for now.
*/
switch (format) {
case PIPE_FORMAT_Z16_UNORM:
return BRW_SURFACEFORMAT_I16_UNORM;
case PIPE_FORMAT_Z32_FLOAT:
return BRW_SURFACEFORMAT_I32_FLOAT;
case PIPE_FORMAT_Z24X8_UNORM:
case PIPE_FORMAT_Z24_UNORM_S8_UINT:
return BRW_SURFACEFORMAT_I24X8_UNORM;
case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
return BRW_SURFACEFORMAT_I32X32_FLOAT;
default:
return ilo_translate_color_format(format);
}
break;
case PIPE_BIND_VERTEX_BUFFER:
/*
* Some 3-component formats are not supported as vertex element formats.
* But since we move between vertices using vb->stride, we should be
* good to use their 4-component counterparts if we force the W
* component to be one. The only exception is that the vb boundary
* check for the last vertex may fail.
*/
switch (format) {
case PIPE_FORMAT_R16G16B16_FLOAT:
return BRW_SURFACEFORMAT_R16G16B16A16_FLOAT;
case PIPE_FORMAT_R16G16B16_UINT:
return BRW_SURFACEFORMAT_R16G16B16A16_UINT;
case PIPE_FORMAT_R16G16B16_SINT:
return BRW_SURFACEFORMAT_R16G16B16A16_SINT;
case PIPE_FORMAT_R8G8B8_UINT:
return BRW_SURFACEFORMAT_R8G8B8A8_UINT;
case PIPE_FORMAT_R8G8B8_SINT:
return BRW_SURFACEFORMAT_R8G8B8A8_SINT;
default:
return ilo_translate_color_format(format);
}
break;
default:
assert(!"cannot translate format");
break;
}
return -1;
}
static inline int
ilo_translate_render_format(enum pipe_format format)
{
return ilo_translate_format(format, PIPE_BIND_RENDER_TARGET);
}
static inline int
ilo_translate_texture_format(enum pipe_format format)
{
return ilo_translate_format(format, PIPE_BIND_SAMPLER_VIEW);
}
static inline int
ilo_translate_vertex_format(enum pipe_format format)
{
return ilo_translate_format(format, PIPE_BIND_VERTEX_BUFFER);
}
#endif /* ILO_FORMAT_H */
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