src/mesa/drivers/dri/i965/brw_formatquery.c

   1 /*
   2  * Copyright © 2015 Intel Corporation
   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 #include "brw_context.h"
  25 #include "main/formatquery.h"
  26
  27 size_t
  28 brw_query_samples_for_format(struct gl_context *ctx, GLenum target,
  29                              GLenum internalFormat, int samples[16])
  30 {
  31    struct brw_context *brw = brw_context(ctx);
  32
  33    (void) target;
  34    (void) internalFormat;
  35
  36    switch (brw->gen) {
  37    case 9:
  38       samples[0] = 16;
  39       samples[1] = 8;
  40       samples[2] = 4;
  41       samples[3] = 2;
  42       return 4;
  43
  44    case 8:
  45       samples[0] = 8;
  46       samples[1] = 4;
  47       samples[2] = 2;
  48       return 3;
  49
  50    case 7:
  51       samples[0] = 8;
  52       samples[1] = 4;
  53       return 2;
  54
  55    case 6:
  56       samples[0] = 4;
  57       return 1;
  58
  59    default:
  60       assert(brw->gen < 6);
  61       samples[0] = 1;
  62       return 1;
  63    }
  64 }
  65
  66 void
  67 brw_query_internal_format(struct gl_context *ctx, GLenum target,
  68                           GLenum internalFormat, GLenum pname, GLint *params)
  69 {
  70    /* The Mesa layer gives us a temporary params buffer that is guaranteed
  71     * to be non-NULL, and have at least 16 elements.
  72     */
  73    assert(params != NULL);
  74
  75    switch (pname) {
  76    default:
  77       /* By default, we call the driver hook's fallback function from the frontend,
  78        * which has generic implementation for all pnames.
  79        */
  80       _mesa_query_internal_format_default(ctx, target, internalFormat, pname,
  81                                           params);
  82       break;
  83    }
  84 }