src/gallium/drivers/freedreno/a3xx/fd3_texture.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "pipe/p_state.h"
  30 #include "util/u_string.h"
  31 #include "util/u_memory.h"
  32 #include "util/u_inlines.h"
  33
  34 #include "fd3_texture.h"
  35 #include "fd3_util.h"
  36
  37 static enum a3xx_tex_clamp
  38 tex_clamp(unsigned wrap)
  39 {
  40         /* hardware probably supports more, but we can't coax all the
  41          * wrap/clamp modes out of the GLESv2 blob driver.
  42          *
  43          * TODO once we have basics working, go back and just try
  44          * different values and see what happens
  45          */
  46         switch (wrap) {
  47         case PIPE_TEX_WRAP_REPEAT:
  48                 return A3XX_TEX_REPEAT;
  49         case PIPE_TEX_WRAP_CLAMP:
  50         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  51         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  52                 return A3XX_TEX_CLAMP_TO_EDGE;
  53         case PIPE_TEX_WRAP_MIRROR_CLAMP:
  54         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  55         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  56         case PIPE_TEX_WRAP_MIRROR_REPEAT:
  57                 return A3XX_TEX_MIRROR_REPEAT;
  58         default:
  59                 DBG("invalid wrap: %u", wrap);
  60                 return 0;
  61         }
  62 }
  63
  64 static enum a3xx_tex_filter
  65 tex_filter(unsigned filter)
  66 {
  67         switch (filter) {
  68         case PIPE_TEX_FILTER_NEAREST:
  69                 return A3XX_TEX_NEAREST;
  70         case PIPE_TEX_FILTER_LINEAR:
  71                 return A3XX_TEX_LINEAR;
  72         default:
  73                 DBG("invalid filter: %u", filter);
  74                 return 0;
  75         }
  76 }
  77
  78 static void *
  79 fd3_sampler_state_create(struct pipe_context *pctx,
  80                 const struct pipe_sampler_state *cso)
  81 {
  82         struct fd3_sampler_stateobj *so = CALLOC_STRUCT(fd3_sampler_stateobj);
  83
  84         if (!so)
  85                 return NULL;
  86
  87         so->base = *cso;
  88
  89         so->texsamp0 =
  90                         A3XX_TEX_SAMP_0_XY_MAG(tex_filter(cso->mag_img_filter)) |
  91                         A3XX_TEX_SAMP_0_XY_MIN(tex_filter(cso->min_img_filter)) |
  92                         A3XX_TEX_SAMP_0_WRAP_S(tex_clamp(cso->wrap_s)) |
  93                         A3XX_TEX_SAMP_0_WRAP_T(tex_clamp(cso->wrap_t)) |
  94                         A3XX_TEX_SAMP_0_WRAP_R(tex_clamp(cso->wrap_r));
  95         so->texsamp1 = 0x00000000;  /* ??? */
  96
  97         return so;
  98 }
  99
 100 static struct pipe_sampler_view *
 101 fd3_sampler_view_create(struct pipe_context *pctx, struct pipe_resource *prsc,
 102                 const struct pipe_sampler_view *cso)
 103 {
 104         struct fd3_pipe_sampler_view *so = CALLOC_STRUCT(fd3_pipe_sampler_view);
 105         struct fd_resource *rsc = fd_resource(prsc);
 106
 107         if (!so)
 108                 return NULL;
 109
 110         so->base = *cso;
 111         pipe_reference(NULL, &prsc->reference);
 112         so->base.texture = prsc;
 113         so->base.reference.count = 1;
 114         so->base.context = pctx;
 115
 116         so->tex_resource =  rsc;
 117
 118         so->texconst0 =
 119                         0x40000000 | /* ??? */
 120                         A3XX_TEX_CONST_0_FMT(fd3_pipe2tex(cso->format)) |
 121                         fd3_tex_swiz(cso->format, cso->swizzle_r, cso->swizzle_g,
 122                                                 cso->swizzle_b, cso->swizzle_a);
 123         so->texconst1 =
 124                         A3XX_TEX_CONST_1_FETCHSIZE(fd3_pipe2fetchsize(cso->format)) |
 125                         A3XX_TEX_CONST_1_WIDTH(prsc->width0) |
 126                         A3XX_TEX_CONST_1_HEIGHT(prsc->height0);
 127         /* when emitted, A3XX_TEX_CONST_2_INDX() must be OR'd in: */
 128         so->texconst2 =
 129                         A3XX_TEX_CONST_2_PITCH(rsc->pitch * rsc->cpp);
 130         so->texconst3 = 0x00000000;  /* ??? */
 131
 132         return &so->base;
 133 }
 134
 135 void
 136 fd3_texture_init(struct pipe_context *pctx)
 137 {
 138         pctx->create_sampler_state = fd3_sampler_state_create;
 139         pctx->create_sampler_view = fd3_sampler_view_create;
 140 }