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->prog.dirty |= FD_SHADER_DIRTY_FP;
  41         ctx->dirty |= FD_DIRTY_PROG;
  42 }
  43
  44 static void
  45 fd_vp_state_bind(struct pipe_context *pctx, void *hwcso)
  46 {
  47         struct fd_context *ctx = fd_context(pctx);
  48         ctx->prog.vp = hwcso;
  49         ctx->prog.dirty |= FD_SHADER_DIRTY_VP;
  50         ctx->dirty |= FD_DIRTY_PROG;
  51 }
  52
  53 static const char *solid_fp =
  54         "FRAG                                        \n"
  55         "PROPERTY FS_COLOR0_WRITES_ALL_CBUFS 1       \n"
  56         "DCL CONST[0]                                \n"
  57         "DCL OUT[0], COLOR                           \n"
  58         "  0: MOV OUT[0], CONST[0]                   \n"
  59         "  1: END                                    \n";
  60
  61 static const char *solid_vp =
  62         "VERT                                        \n"
  63         "DCL IN[0]                                   \n"
  64         "DCL OUT[0], POSITION                        \n"
  65         "  0: MOV OUT[0], IN[0]                      \n"
  66         "  1: END                                    \n";
  67
  68 static const char *blit_vp =
  69         "VERT                                        \n"
  70         "DCL IN[0]                                   \n"
  71         "DCL IN[1]                                   \n"
  72         "DCL OUT[0], TEXCOORD[0]                     \n"
  73         "DCL OUT[1], POSITION                        \n"
  74         "  0: MOV OUT[0], IN[0]                      \n"
  75         "  0: MOV OUT[1], IN[1]                      \n"
  76         "  1: END                                    \n";
  77
  78 static void * assemble_tgsi(struct pipe_context *pctx,
  79                 const char *src, bool frag)
  80 {
  81         struct tgsi_token toks[32];
  82         struct pipe_shader_state cso = {
  83                         .tokens = toks,
  84         };
  85
  86         tgsi_text_translate(src, toks, ARRAY_SIZE(toks));
  87
  88         if (frag)
  89                 return pctx->create_fs_state(pctx, &cso);
  90         else
  91                 return pctx->create_vs_state(pctx, &cso);
  92 }
  93
  94 static void *
  95 fd_prog_blit(struct pipe_context *pctx, int rts, bool depth)
  96 {
  97         int i;
  98         struct ureg_src tc;
  99         struct ureg_program *ureg;
 100
 101         debug_assert(rts <= MAX_RENDER_TARGETS);
 102
 103         ureg = ureg_create(PIPE_SHADER_FRAGMENT);
 104         if (!ureg)
 105                 return NULL;
 106
 107         tc = ureg_DECL_fs_input(
 108                         ureg, TGSI_SEMANTIC_GENERIC, 0, TGSI_INTERPOLATE_PERSPECTIVE);
 109         for (i = 0; i < rts; i++)
 110                 ureg_TEX(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, i),
 111                                  TGSI_TEXTURE_2D, tc, ureg_DECL_sampler(ureg, i));
 112         if (depth)
 113                 ureg_TEX(ureg,
 114                                  ureg_writemask(
 115                                                  ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0),
 116                                                  TGSI_WRITEMASK_Z),
 117                                  TGSI_TEXTURE_2D, tc, ureg_DECL_sampler(ureg, rts));
 118
 119         ureg_END(ureg);
 120
 121         return ureg_create_shader_and_destroy(ureg, pctx);
 122 }
 123
 124
 125 void fd_prog_init(struct pipe_context *pctx)
 126 {
 127         struct fd_context *ctx = fd_context(pctx);
 128         int i;
 129
 130         pctx->bind_fs_state = fd_fp_state_bind;
 131         pctx->bind_vs_state = fd_vp_state_bind;
 132
 133         // XXX for now, let a2xx keep it's own hand-rolled shaders
 134         // for solid and blit progs:
 135         if (ctx->screen->gpu_id < 300)
 136                 return;
 137
 138         ctx->solid_prog.fp = assemble_tgsi(pctx, solid_fp, true);
 139         ctx->solid_prog.vp = assemble_tgsi(pctx, solid_vp, false);
 140         ctx->blit_prog[0].vp = assemble_tgsi(pctx, blit_vp, false);
 141         ctx->blit_prog[0].fp = fd_prog_blit(pctx, 1, false);
 142         for (i = 1; i < ctx->screen->max_rts; i++) {
 143                 ctx->blit_prog[i].vp = ctx->blit_prog[0].vp;
 144                 ctx->blit_prog[i].fp = fd_prog_blit(pctx, i + 1, false);
 145         }
 146
 147         ctx->blit_z.vp = ctx->blit_prog[0].vp;
 148         ctx->blit_z.fp = fd_prog_blit(pctx, 0, true);
 149         ctx->blit_zs.vp = ctx->blit_prog[0].vp;
 150         ctx->blit_zs.fp = fd_prog_blit(pctx, 1, true);
 151 }
 152
 153 void fd_prog_fini(struct pipe_context *pctx)
 154 {
 155         struct fd_context *ctx = fd_context(pctx);
 156         int i;
 157
 158         pctx->delete_vs_state(pctx, ctx->solid_prog.vp);
 159         pctx->delete_fs_state(pctx, ctx->solid_prog.fp);
 160         pctx->delete_vs_state(pctx, ctx->blit_prog[0].vp);
 161         for (i = 0; i < ctx->screen->max_rts; i++)
 162                 pctx->delete_fs_state(pctx, ctx->blit_prog[i].fp);
 163         pctx->delete_fs_state(pctx, ctx->blit_z.fp);
 164         pctx->delete_fs_state(pctx, ctx->blit_zs.fp);
 165 }