src/gallium/drivers/freedreno/freedreno_program.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2014 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 "tgsi/tgsi_text.h"
  30 #include "tgsi/tgsi_ureg.h"
  31
  32 #include "freedreno_program.h"
  33 #include "freedreno_context.h"
  34
  35 static void
  36 fd_fp_state_bind(struct pipe_context *pctx, void *hwcso)
  37 {
  38         struct fd_context *ctx = fd_context(pctx);
  39         ctx->prog.fp = hwcso;
  40         ctx->dirty |= FD_SHADER_DIRTY_FP;
  41 }
  42
  43 static void
  44 fd_vp_state_bind(struct pipe_context *pctx, void *hwcso)
  45 {
  46         struct fd_context *ctx = fd_context(pctx);
  47         ctx->prog.vp = hwcso;
  48         ctx->dirty |= FD_SHADER_DIRTY_VP;
  49 }
  50
  51 static const char *solid_fp =
  52         "FRAG                                        \n"
  53         "PROPERTY FS_COLOR0_WRITES_ALL_CBUFS 1       \n"
  54         "DCL CONST[0]                                \n"
  55         "DCL OUT[0], COLOR                           \n"
  56         "  0: MOV OUT[0], CONST[0]                   \n"
  57         "  1: END                                    \n";
  58
  59 static const char *solid_vp =
  60         "VERT                                        \n"
  61         "DCL IN[0]                                   \n"
  62         "DCL OUT[0], POSITION                        \n"
  63         "  0: MOV OUT[0], IN[0]                      \n"
  64         "  1: END                                    \n";
  65
  66 static const char *blit_vp =
  67         "VERT                                        \n"
  68         "DCL IN[0]                                   \n"
  69         "DCL IN[1]                                   \n"
  70         "DCL OUT[0], TEXCOORD[0]                     \n"
  71         "DCL OUT[1], POSITION                        \n"
  72         "  0: MOV OUT[0], IN[0]                      \n"
  73         "  0: MOV OUT[1], IN[1]                      \n"
  74         "  1: END                                    \n";
  75
  76 static void * assemble_tgsi(struct pipe_context *pctx,
  77                 const char *src, bool frag)
  78 {
  79         struct tgsi_token toks[32];
  80         struct pipe_shader_state cso = {
  81                         .tokens = toks,
  82         };
  83
  84         tgsi_text_translate(src, toks, ARRAY_SIZE(toks));
  85
  86         if (frag)
  87                 return pctx->create_fs_state(pctx, &cso);
  88         else
  89                 return pctx->create_vs_state(pctx, &cso);
  90 }
  91
  92 static void *
  93 fd_prog_blit(struct pipe_context *pctx, int rts, bool depth)
  94 {
  95         int i;
  96         struct ureg_src tc;
  97         struct ureg_program *ureg;
  98
  99         debug_assert(rts <= MAX_RENDER_TARGETS);
 100
 101         ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 102         if (!ureg)
 103                 return NULL;
 104
 105         tc = ureg_DECL_fs_input(
 106                         ureg, TGSI_SEMANTIC_GENERIC, 0, TGSI_INTERPOLATE_PERSPECTIVE);
 107         for (i = 0; i < rts; i++)
 108                 ureg_TEX(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, i),
 109                                  TGSI_TEXTURE_2D, tc, ureg_DECL_sampler(ureg, i));
 110         if (depth)
 111                 ureg_TEX(ureg,
 112                                  ureg_writemask(
 113                                                  ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0),
 114                                                  TGSI_WRITEMASK_Z),
 115                                  TGSI_TEXTURE_2D, tc, ureg_DECL_sampler(ureg, rts));
 116
 117         ureg_END(ureg);
 118
 119         return ureg_create_shader_and_destroy(ureg, pctx);
 120 }
 121
 122
 123 void fd_prog_init(struct pipe_context *pctx)
 124 {
 125         struct fd_context *ctx = fd_context(pctx);
 126         int i;
 127
 128         pctx->bind_fs_state = fd_fp_state_bind;
 129         pctx->bind_vs_state = fd_vp_state_bind;
 130
 131         // XXX for now, let a2xx keep it's own hand-rolled shaders
 132         // for solid and blit progs:
 133         if (ctx->screen->gpu_id < 300)
 134                 return;
 135
 136         ctx->solid_prog.fp = assemble_tgsi(pctx, solid_fp, true);
 137         ctx->solid_prog.vp = assemble_tgsi(pctx, solid_vp, false);
 138         ctx->blit_prog[0].vp = assemble_tgsi(pctx, blit_vp, false);
 139         ctx->blit_prog[0].fp = fd_prog_blit(pctx, 1, false);
 140         for (i = 1; i < ctx->screen->max_rts; i++) {
 141                 ctx->blit_prog[i].vp = ctx->blit_prog[0].vp;
 142                 ctx->blit_prog[i].fp = fd_prog_blit(pctx, i + 1, false);
 143         }
 144
 145         ctx->blit_z.vp = ctx->blit_prog[0].vp;
 146         ctx->blit_z.fp = fd_prog_blit(pctx, 0, true);
 147         ctx->blit_zs.vp = ctx->blit_prog[0].vp;
 148         ctx->blit_zs.fp = fd_prog_blit(pctx, 1, true);
 149 }
 150
 151 void fd_prog_fini(struct pipe_context *pctx)
 152 {
 153         struct fd_context *ctx = fd_context(pctx);
 154         int i;
 155
 156         pctx->delete_vs_state(pctx, ctx->solid_prog.vp);
 157         pctx->delete_fs_state(pctx, ctx->solid_prog.fp);
 158         pctx->delete_vs_state(pctx, ctx->blit_prog[0].vp);
 159         for (i = 0; i < ctx->screen->max_rts; i++)
 160                 pctx->delete_fs_state(pctx, ctx->blit_prog[i].fp);
 161         pctx->delete_fs_state(pctx, ctx->blit_z.fp);
 162         pctx->delete_fs_state(pctx, ctx->blit_zs.fp);
 163 }