src/gallium/drivers/freedreno/a2xx/fd2_texture.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2012-2013 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 "fd2_texture.h"
  35 #include "fd2_util.h"
  36
  37 static enum sq_tex_clamp
  38 tex_clamp(unsigned wrap)
  39 {
  40         switch (wrap) {
  41         case PIPE_TEX_WRAP_REPEAT:
  42                 return SQ_TEX_WRAP;
  43         case PIPE_TEX_WRAP_CLAMP:
  44                 return SQ_TEX_CLAMP_HALF_BORDER;
  45         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  46                 return SQ_TEX_CLAMP_LAST_TEXEL;
  47         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  48                 return SQ_TEX_CLAMP_BORDER;
  49         case PIPE_TEX_WRAP_MIRROR_REPEAT:
  50                 return SQ_TEX_MIRROR;
  51         case PIPE_TEX_WRAP_MIRROR_CLAMP:
  52                 return SQ_TEX_MIRROR_ONCE_HALF_BORDER;
  53         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  54                 return SQ_TEX_MIRROR_ONCE_LAST_TEXEL;
  55         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  56                 return SQ_TEX_MIRROR_ONCE_BORDER;
  57         default:
  58                 DBG("invalid wrap: %u", wrap);
  59                 return 0;
  60         }
  61 }
  62
  63 static enum sq_tex_filter
  64 tex_filter(unsigned filter)
  65 {
  66         switch (filter) {
  67         case PIPE_TEX_FILTER_NEAREST:
  68                 return SQ_TEX_FILTER_POINT;
  69         case PIPE_TEX_FILTER_LINEAR:
  70                 return SQ_TEX_FILTER_BILINEAR;
  71         default:
  72                 DBG("invalid filter: %u", filter);
  73                 return 0;
  74         }
  75 }
  76
  77 static void *
  78 fd2_sampler_state_create(struct pipe_context *pctx,
  79                 const struct pipe_sampler_state *cso)
  80 {
  81         struct fd2_sampler_stateobj *so = CALLOC_STRUCT(fd2_sampler_stateobj);
  82
  83         if (!so)
  84                 return NULL;
  85
  86         so->base = *cso;
  87
  88         /* SQ_TEX0_PITCH() must be OR'd in later when we know the bound texture: */
  89         so->tex0 =
  90                 A2XX_SQ_TEX_0_CLAMP_X(tex_clamp(cso->wrap_s)) |
  91                 A2XX_SQ_TEX_0_CLAMP_Y(tex_clamp(cso->wrap_t)) |
  92                 A2XX_SQ_TEX_0_CLAMP_Z(tex_clamp(cso->wrap_r));
  93
  94         so->tex3 =
  95                 A2XX_SQ_TEX_3_XY_MAG_FILTER(tex_filter(cso->mag_img_filter)) |
  96                 A2XX_SQ_TEX_3_XY_MIN_FILTER(tex_filter(cso->min_img_filter));
  97
  98         so->tex4 = 0x00000000; /* ??? */
  99         so->tex5 = 0x00000200; /* ??? */
 100
 101         return so;
 102 }
 103
 104 static void
 105 fd2_sampler_states_bind(struct pipe_context *pctx,
 106                 unsigned shader, unsigned start,
 107                 unsigned nr, void **hwcso)
 108 {
 109         if (shader == PIPE_SHADER_FRAGMENT) {
 110                 struct fd_context *ctx = fd_context(pctx);
 111
 112                 /* on a2xx, since there is a flat address space for textures/samplers,
 113                  * a change in # of fragment textures/samplers will trigger patching and
 114                  * re-emitting the vertex shader:
 115                  */
 116                 if (nr != ctx->fragtex.num_samplers)
 117                         ctx->dirty |= FD_DIRTY_TEXSTATE;
 118         }
 119
 120         fd_sampler_states_bind(pctx, shader, start, nr, hwcso);
 121 }
 122
 123 static struct pipe_sampler_view *
 124 fd2_sampler_view_create(struct pipe_context *pctx, struct pipe_resource *prsc,
 125                 const struct pipe_sampler_view *cso)
 126 {
 127         struct fd2_pipe_sampler_view *so = CALLOC_STRUCT(fd2_pipe_sampler_view);
 128         struct fd_resource *rsc = fd_resource(prsc);
 129
 130         if (!so)
 131                 return NULL;
 132
 133         so->base = *cso;
 134         pipe_reference(NULL, &prsc->reference);
 135         so->base.texture = prsc;
 136         so->base.reference.count = 1;
 137         so->base.context = pctx;
 138
 139         so->tex_resource =  rsc;
 140         so->fmt = fd2_pipe2surface(cso->format);
 141
 142         so->tex0 = A2XX_SQ_TEX_0_PITCH(rsc->slices[0].pitch);
 143         so->tex2 =
 144                 A2XX_SQ_TEX_2_HEIGHT(prsc->height0 - 1) |
 145                 A2XX_SQ_TEX_2_WIDTH(prsc->width0 - 1);
 146         so->tex3 = fd2_tex_swiz(cso->format, cso->swizzle_r, cso->swizzle_g,
 147                         cso->swizzle_b, cso->swizzle_a);
 148
 149         return &so->base;
 150 }
 151
 152 /* map gallium sampler-id to hw const-idx.. adreno uses a flat address
 153  * space of samplers (const-idx), so we need to map the gallium sampler-id
 154  * which is per-shader to a global const-idx space.
 155  *
 156  * Fragment shader sampler maps directly to const-idx, and vertex shader
 157  * is offset by the # of fragment shader samplers.  If the # of fragment
 158  * shader samplers changes, this shifts the vertex shader indexes.
 159  *
 160  * TODO maybe we can do frag shader 0..N  and vert shader N..0 to avoid
 161  * this??
 162  */
 163 unsigned
 164 fd2_get_const_idx(struct fd_context *ctx, struct fd_texture_stateobj *tex,
 165                 unsigned samp_id)
 166 {
 167         if (tex == &ctx->fragtex)
 168                 return samp_id;
 169         return samp_id + ctx->fragtex.num_samplers;
 170 }
 171
 172 void
 173 fd2_texture_init(struct pipe_context *pctx)
 174 {
 175         pctx->create_sampler_state = fd2_sampler_state_create;
 176         pctx->bind_sampler_states = fd2_sampler_states_bind;
 177         pctx->create_sampler_view = fd2_sampler_view_create;
 178 }