Chia-I Wu
151 lines
5.0 KiB
C
151 lines
5.0 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright (C) 2012-2013 LunarG, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Chia-I Wu <olv@lunarg.com>
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*/
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#ifndef ILO_FORMAT_H
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#define ILO_FORMAT_H
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#include "genhw/genhw.h"
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#include "ilo_common.h"
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struct ilo_screen;
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void
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ilo_init_format_functions(struct ilo_screen *is);
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int
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ilo_translate_color_format(const struct ilo_dev *dev,
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enum pipe_format format);
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/**
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* Translate a pipe format to a hardware surface format suitable for
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* the given purpose. Return -1 on errors.
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*
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* This is an inline function not only for performance reasons. There are
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* caveats that the callers should be aware of before calling this function.
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*/
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static inline int
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ilo_translate_format(const struct ilo_dev *dev,
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enum pipe_format format, unsigned bind)
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{
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switch (bind) {
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case PIPE_BIND_RENDER_TARGET:
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/*
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* Some RGBX formats are not supported as render target formats. But we
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* can use their RGBA counterparts and force the destination alpha to be
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* one when blending is enabled.
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*/
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switch (format) {
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case PIPE_FORMAT_B8G8R8X8_UNORM:
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return GEN6_FORMAT_B8G8R8A8_UNORM;
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default:
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return ilo_translate_color_format(dev, format);
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}
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break;
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case PIPE_BIND_SAMPLER_VIEW:
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/*
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* For depth formats, we want the depth values to be returned as R
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* values. But we assume in many places that the depth values are
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* returned as I values (util_make_fragment_tex_shader_writedepth() is
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* one such example). We have to live with that at least for now.
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*
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* For ETC1 format, the texture data will be decompressed before being
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* written to the bo. See tex_staging_sys_convert_write().
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*/
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switch (format) {
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case PIPE_FORMAT_Z16_UNORM:
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return GEN6_FORMAT_I16_UNORM;
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case PIPE_FORMAT_Z32_FLOAT:
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return GEN6_FORMAT_I32_FLOAT;
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case PIPE_FORMAT_Z24X8_UNORM:
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case PIPE_FORMAT_Z24_UNORM_S8_UINT:
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return GEN6_FORMAT_I24X8_UNORM;
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case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
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return GEN6_FORMAT_I32X32_FLOAT;
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case PIPE_FORMAT_ETC1_RGB8:
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return GEN6_FORMAT_R8G8B8X8_UNORM;
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default:
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return ilo_translate_color_format(dev, format);
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}
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break;
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case PIPE_BIND_VERTEX_BUFFER:
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if (ilo_dev_gen(dev) >= ILO_GEN(7.5))
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return ilo_translate_color_format(dev, format);
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/*
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* Some 3-component formats are not supported as vertex element formats.
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* But since we move between vertices using vb->stride, we should be
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* good to use their 4-component counterparts if we force the W
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* component to be one. The only exception is that the vb boundary
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* check for the last vertex may fail.
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*/
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switch (format) {
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case PIPE_FORMAT_R16G16B16_FLOAT:
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return GEN6_FORMAT_R16G16B16A16_FLOAT;
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case PIPE_FORMAT_R16G16B16_UINT:
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return GEN6_FORMAT_R16G16B16A16_UINT;
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case PIPE_FORMAT_R16G16B16_SINT:
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return GEN6_FORMAT_R16G16B16A16_SINT;
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case PIPE_FORMAT_R8G8B8_UINT:
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return GEN6_FORMAT_R8G8B8A8_UINT;
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case PIPE_FORMAT_R8G8B8_SINT:
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return GEN6_FORMAT_R8G8B8A8_SINT;
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default:
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return ilo_translate_color_format(dev, format);
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}
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break;
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default:
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assert(!"cannot translate format");
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break;
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}
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return -1;
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}
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static inline int
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ilo_translate_render_format(const struct ilo_dev *dev,
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enum pipe_format format)
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{
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return ilo_translate_format(dev, format, PIPE_BIND_RENDER_TARGET);
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}
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static inline int
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ilo_translate_texture_format(const struct ilo_dev *dev,
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enum pipe_format format)
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{
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return ilo_translate_format(dev, format, PIPE_BIND_SAMPLER_VIEW);
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}
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static inline int
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ilo_translate_vertex_format(const struct ilo_dev *dev,
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enum pipe_format format)
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{
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return ilo_translate_format(dev, format, PIPE_BIND_VERTEX_BUFFER);
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}
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#endif /* ILO_FORMAT_H */
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