src/gallium/drivers/v3d/v3d_formats.c

   1 /*
   2  * Copyright © 2014-2017 Broadcom
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * @file v3d_formats.c
  26  *
  27  * Contains the table and accessors for VC5 texture and render target format
  28  * support.
  29  *
  30  * The hardware has limited support for texture formats, and extremely limited
  31  * support for render target formats.  As a result, we emulate other formats
  32  * in our shader code, and this stores the table for doing so.
  33  */
  34
  35 #include "util/macros.h"
  36
  37 #include "v3d_context.h"
  38 #include "v3d_format_table.h"
  39
  40 static const struct v3d_format *
  41 get_format(const struct v3d_device_info *devinfo, enum pipe_format f)
  42 {
  43         if (devinfo->ver >= 41)
  44                 return v3d41_get_format_desc(f);
  45         else
  46                 return v3d33_get_format_desc(f);
  47 }
  48
  49 bool
  50 v3d_rt_format_supported(const struct v3d_device_info *devinfo,
  51                         enum pipe_format f)
  52 {
  53         const struct v3d_format *vf = get_format(devinfo, f);
  54
  55         if (!vf)
  56                 return false;
  57
  58         return vf->rt_type != V3D_OUTPUT_IMAGE_FORMAT_NO;
  59 }
  60
  61 uint8_t
  62 v3d_get_rt_format(const struct v3d_device_info *devinfo, enum pipe_format f)
  63 {
  64         const struct v3d_format *vf = get_format(devinfo, f);
  65
  66         if (!vf)
  67                 return 0;
  68
  69         return vf->rt_type;
  70 }
  71
  72 bool
  73 v3d_tex_format_supported(const struct v3d_device_info *devinfo,
  74                          enum pipe_format f)
  75 {
  76         const struct v3d_format *vf = get_format(devinfo, f);
  77
  78         return vf != NULL;
  79 }
  80
  81 uint8_t
  82 v3d_get_tex_format(const struct v3d_device_info *devinfo, enum pipe_format f)
  83 {
  84         const struct v3d_format *vf = get_format(devinfo, f);
  85
  86         if (!vf)
  87                 return 0;
  88
  89         return vf->tex_type;
  90 }
  91
  92 uint8_t
  93 v3d_get_tex_return_size(const struct v3d_device_info *devinfo,
  94                         enum pipe_format f, enum pipe_tex_compare compare)
  95 {
  96         const struct v3d_format *vf = get_format(devinfo, f);
  97
  98         if (!vf)
  99                 return 0;
 100
 101         if (compare == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 102                 return 16;
 103
 104         return vf->return_size;
 105 }
 106
 107 uint8_t
 108 v3d_get_tex_return_channels(const struct v3d_device_info *devinfo,
 109                             enum pipe_format f)
 110 {
 111         const struct v3d_format *vf = get_format(devinfo, f);
 112
 113         if (!vf)
 114                 return 0;
 115
 116         return vf->return_channels;
 117 }
 118
 119 const uint8_t *
 120 v3d_get_format_swizzle(const struct v3d_device_info *devinfo, enum pipe_format f)
 121 {
 122         const struct v3d_format *vf = get_format(devinfo, f);
 123         static const uint8_t fallback[] = {0, 1, 2, 3};
 124
 125         if (!vf)
 126                 return fallback;
 127
 128         return vf->swizzle;
 129 }
 130
 131 void
 132 v3d_get_internal_type_bpp_for_output_format(const struct v3d_device_info *devinfo,
 133                                             uint32_t format,
 134                                             uint32_t *type,
 135                                             uint32_t *bpp)
 136 {
 137         if (devinfo->ver >= 41) {
 138                 return v3d41_get_internal_type_bpp_for_output_format(format,
 139                                                                      type, bpp);
 140         } else {
 141                 return v3d33_get_internal_type_bpp_for_output_format(format,
 142                                                                      type, bpp);
 143         }
 144 }
 145
 146 bool
 147 v3d_tfu_supports_tex_format(const struct v3d_device_info *devinfo,
 148                             uint32_t tex_format)
 149 {
 150         if (devinfo->ver >= 41) {
 151                 return v3d41_tfu_supports_tex_format(tex_format);
 152         } else {
 153                 return v3d33_tfu_supports_tex_format(tex_format);
 154         }
 155 }