src/gallium/drivers/svga/svga_pipe_vs.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "draw/draw_context.h"
  27 #include "util/u_inlines.h"
  28 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_bitmask.h"
  31 #include "tgsi/tgsi_parse.h"
  32 #include "tgsi/tgsi_text.h"
  33
  34 #include "svga_context.h"
  35 #include "svga_hw_reg.h"
  36 #include "svga_cmd.h"
  37 #include "svga_debug.h"
  38 #include "svga_shader.h"
  39 #include "svga_streamout.h"
  40
  41
  42 /**
  43  * Substitute a debug shader.
  44  */
  45 static const struct tgsi_token *
  46 substitute_vs(unsigned shader_id, const struct tgsi_token *old_tokens)
  47 {
  48 #if 0
  49    if (shader_id == 12) {
  50    static struct tgsi_token tokens[300];
  51
  52    const char *text =
  53       "VERT\n"
  54       "DCL IN[0]\n"
  55       "DCL IN[1]\n"
  56       "DCL IN[2]\n"
  57       "DCL OUT[0], POSITION\n"
  58       "DCL TEMP[0..4]\n"
  59       "IMM FLT32 {     1.0000,     1.0000,     1.0000,     1.0000 }\n"
  60       "IMM FLT32 {     0.45,     1.0000,     1.0000,     1.0000 }\n"
  61       "IMM FLT32 { 1.297863, 0.039245, 0.035993, 0.035976}\n"
  62       "IMM FLT32 { -0.019398, 1.696131, -0.202151, -0.202050  }\n"
  63       "IMM FLT32 { 0.051711, -0.348713, -0.979204, -0.978714  }\n"
  64       "IMM FLT32 { 0.000000, 0.000003, 139.491577, 141.421356 }\n"
  65       "DCL CONST[0..7]\n"
  66       "DCL CONST[9..16]\n"
  67       "  MOV TEMP[2], IMM[0]\n"
  68
  69       "  MOV TEMP[2].xyz, IN[2]\n"
  70       "  MOV TEMP[2].xyz, IN[0]\n"
  71       "  MOV TEMP[2].xyz, IN[1]\n"
  72
  73       "  MUL TEMP[1], IMM[3], TEMP[2].yyyy\n"
  74       "  MAD TEMP[3], IMM[2],  TEMP[2].xxxx, TEMP[1]\n"
  75       "  MAD TEMP[1], IMM[4], TEMP[2].zzzz, TEMP[3]\n"
  76       "  MAD TEMP[4], IMM[5], TEMP[2].wwww, TEMP[1]\n"
  77
  78       "  MOV OUT[0], TEMP[4]\n"
  79       "  END\n";
  80
  81    if (!tgsi_text_translate(text,
  82                              tokens,
  83                              Elements(tokens)))
  84    {
  85       assert(0);
  86       return NULL;
  87    }
  88
  89    return tokens;
  90    }
  91 #endif
  92
  93    return old_tokens;
  94 }
  95
  96
  97 static void *
  98 svga_create_vs_state(struct pipe_context *pipe,
  99                      const struct pipe_shader_state *templ)
 100 {
 101    struct svga_context *svga = svga_context(pipe);
 102    struct svga_vertex_shader *vs = CALLOC_STRUCT(svga_vertex_shader);
 103
 104    if (!vs)
 105       return NULL;
 106
 107    /* substitute a debug shader?
 108     */
 109    vs->base.tokens = tgsi_dup_tokens(substitute_vs(svga->debug.shader_id,
 110                                                    templ->tokens));
 111
 112    /* Collect basic info that we'll need later:
 113     */
 114    tgsi_scan_shader(vs->base.tokens, &vs->base.info);
 115
 116    {
 117       /* Need to do construct a new template in case we substitued a
 118        * debug shader.
 119        */
 120       struct pipe_shader_state tmp2 = *templ;
 121       tmp2.tokens = vs->base.tokens;
 122       vs->draw_shader = draw_create_vertex_shader(svga->swtnl.draw, &tmp2);
 123    }
 124
 125    vs->base.id = svga->debug.shader_id++;
 126
 127    vs->generic_outputs = svga_get_generic_outputs_mask(&vs->base.info);
 128
 129    /* check for any stream output declarations */
 130    if (templ->stream_output.num_outputs) {
 131       vs->base.stream_output = svga_create_stream_output(svga, &vs->base,
 132                                                          &templ->stream_output);
 133    }
 134
 135    return vs;
 136 }
 137
 138
 139 static void
 140 svga_bind_vs_state(struct pipe_context *pipe, void *shader)
 141 {
 142    struct svga_vertex_shader *vs = (struct svga_vertex_shader *)shader;
 143    struct svga_context *svga = svga_context(pipe);
 144
 145    if (vs == svga->curr.vs)
 146       return;
 147
 148    /* If the currently bound vertex shader has a generated geometry shader,
 149     * then unbind the geometry shader before binding a new vertex shader.
 150     * We need to unbind the geometry shader here because there is no
 151     * pipe_shader associated with the generated geometry shader.
 152     */
 153    if (svga->curr.vs != NULL && svga->curr.vs->gs != NULL)
 154       svga->pipe.bind_gs_state(&svga->pipe, NULL);
 155
 156    svga->curr.vs = vs;
 157    svga->dirty |= SVGA_NEW_VS;
 158 }
 159
 160
 161 static void
 162 svga_delete_vs_state(struct pipe_context *pipe, void *shader)
 163 {
 164    struct svga_context *svga = svga_context(pipe);
 165    struct svga_vertex_shader *vs = (struct svga_vertex_shader *)shader;
 166    struct svga_shader_variant *variant, *tmp;
 167    enum pipe_error ret;
 168
 169    svga_hwtnl_flush_retry(svga);
 170
 171    assert(vs->base.parent == NULL);
 172
 173    /* Check if there is a generated geometry shader to go with this
 174     * vertex shader. If there is, then delete the geometry shader as well.
 175     */
 176    if (vs->gs != NULL) {
 177       svga->pipe.delete_gs_state(&svga->pipe, vs->gs);
 178    }
 179
 180    if (vs->base.stream_output != NULL)
 181       svga_delete_stream_output(svga, vs->base.stream_output);
 182
 183    draw_delete_vertex_shader(svga->swtnl.draw, vs->draw_shader);
 184
 185    for (variant = vs->base.variants; variant; variant = tmp) {
 186       tmp = variant->next;
 187
 188       /* Check if deleting currently bound shader */
 189       if (variant == svga->state.hw_draw.vs) {
 190          ret = svga_set_shader(svga, SVGA3D_SHADERTYPE_VS, NULL);
 191          if (ret != PIPE_OK) {
 192             svga_context_flush(svga, NULL);
 193             ret = svga_set_shader(svga, SVGA3D_SHADERTYPE_VS, NULL);
 194             assert(ret == PIPE_OK);
 195          }
 196          svga->state.hw_draw.vs = NULL;
 197       }
 198
 199       ret = svga_destroy_shader_variant(svga, SVGA3D_SHADERTYPE_VS, variant);
 200       if (ret != PIPE_OK) {
 201          svga_context_flush(svga, NULL);
 202          ret = svga_destroy_shader_variant(svga, SVGA3D_SHADERTYPE_VS, variant);
 203          assert(ret == PIPE_OK);
 204       }
 205    }
 206
 207    FREE((void *)vs->base.tokens);
 208    FREE(vs);
 209 }
 210
 211
 212 void
 213 svga_init_vs_functions(struct svga_context *svga)
 214 {
 215    svga->pipe.create_vs_state = svga_create_vs_state;
 216    svga->pipe.bind_vs_state = svga_bind_vs_state;
 217    svga->pipe.delete_vs_state = svga_delete_vs_state;
 218 }
 219