src/gallium/drivers/svga/svga_state_constants.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 "util/u_inlines.h"
  27 #include "pipe/p_defines.h"
  28
  29 #include "svga_context.h"
  30 #include "svga_state.h"
  31 #include "svga_cmd.h"
  32 #include "svga_tgsi.h"
  33 #include "svga_debug.h"
  34
  35 #include "svga_hw_reg.h"
  36
  37 /***********************************************************************
  38  * Hardware update
  39  */
  40
  41 /* Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
  42  */
  43 static int svga_shader_type( int unit )
  44 {
  45    return unit + 1;
  46 }
  47
  48
  49 static int emit_const( struct svga_context *svga,
  50                        int unit,
  51                        int i,
  52                        const float *value )
  53 {
  54    int ret = PIPE_OK;
  55
  56    if (memcmp(svga->state.hw_draw.cb[unit][i], value, 4 * sizeof(float)) != 0) {
  57       if (SVGA_DEBUG & DEBUG_CONSTS)
  58          debug_printf("%s %s %d: %f %f %f %f\n",
  59                       __FUNCTION__,
  60                       unit == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
  61                       i,
  62                       value[0],
  63                       value[1],
  64                       value[2],
  65                       value[3]);
  66
  67       ret = SVGA3D_SetShaderConst( svga->swc,
  68                                    i,
  69                                    svga_shader_type(unit),
  70                                    SVGA3D_CONST_TYPE_FLOAT,
  71                                    value );
  72       if (ret)
  73          return ret;
  74
  75       memcpy(svga->state.hw_draw.cb[unit][i], value, 4 * sizeof(float));
  76    }
  77
  78    return ret;
  79 }
  80
  81 static int emit_consts( struct svga_context *svga,
  82                         int offset,
  83                         int unit )
  84 {
  85    struct pipe_transfer *transfer = NULL;
  86    unsigned count;
  87    const float (*data)[4] = NULL;
  88    unsigned i;
  89    int ret = PIPE_OK;
  90
  91    if (svga->curr.cb[unit] == NULL)
  92       goto done;
  93
  94    count = svga->curr.cb[unit]->width0 / (4 * sizeof(float));
  95
  96    data = (const float (*)[4])pipe_buffer_map(&svga->pipe,
  97                                               svga->curr.cb[unit],
  98                                               PIPE_TRANSFER_READ,
  99                                               &transfer);
 100    if (data == NULL) {
 101       ret = PIPE_ERROR_OUT_OF_MEMORY;
 102       goto done;
 103    }
 104
 105    for (i = 0; i < count; i++) {
 106       ret = emit_const( svga, unit, offset + i, data[i] );
 107       if (ret)
 108          goto done;
 109    }
 110
 111 done:
 112    if (data)
 113       pipe_buffer_unmap(&svga->pipe, svga->curr.cb[unit], transfer);
 114
 115    return ret;
 116 }
 117
 118 static int emit_fs_consts( struct svga_context *svga,
 119                            unsigned dirty )
 120 {
 121    const struct svga_shader_result *result = svga->state.hw_draw.fs;
 122    const struct svga_fs_compile_key *key = &result->key.fkey;
 123    int ret = 0;
 124
 125    ret = emit_consts( svga, 0, PIPE_SHADER_FRAGMENT );
 126    if (ret)
 127       return ret;
 128
 129    /* The internally generated fragment shader for xor blending
 130     * doesn't have a 'result' struct.  It should be fixed to avoid
 131     * this special case, but work around it with a NULL check:
 132     */
 133    if (result != NULL &&
 134        key->num_unnormalized_coords)
 135    {
 136       unsigned offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 137       int i;
 138
 139       for (i = 0; i < key->num_textures; i++) {
 140          if (key->tex[i].unnormalized) {
 141             struct pipe_resource *tex = svga->curr.sampler_views[i]->texture;
 142             float data[4];
 143
 144             data[0] = 1.0 / (float)tex->width0;
 145             data[1] = 1.0 / (float)tex->height0;
 146             data[2] = 1.0;
 147             data[3] = 1.0;
 148
 149             ret = emit_const( svga,
 150                               PIPE_SHADER_FRAGMENT,
 151                               key->tex[i].width_height_idx + offset,
 152                               data );
 153             if (ret)
 154                return ret;
 155          }
 156       }
 157
 158       offset += key->num_unnormalized_coords;
 159    }
 160
 161    return 0;
 162 }
 163
 164
 165 struct svga_tracked_state svga_hw_fs_parameters =
 166 {
 167    "hw fs params",
 168    (SVGA_NEW_FS_CONST_BUFFER |
 169     SVGA_NEW_FS_RESULT |
 170     SVGA_NEW_TEXTURE_BINDING),
 171    emit_fs_consts
 172 };
 173
 174 /***********************************************************************
 175  */
 176
 177 static int emit_vs_consts( struct svga_context *svga,
 178                            unsigned dirty )
 179 {
 180    const struct svga_shader_result *result = svga->state.hw_draw.vs;
 181    const struct svga_vs_compile_key *key = &result->key.vkey;
 182    int ret = 0;
 183    unsigned offset;
 184
 185    /* SVGA_NEW_VS_RESULT
 186     */
 187    if (result == NULL)
 188       return 0;
 189
 190    /* SVGA_NEW_VS_CONST_BUFFER
 191     */
 192    ret = emit_consts( svga, 0, PIPE_SHADER_VERTEX );
 193    if (ret)
 194       return ret;
 195
 196    offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 197
 198    /* SVGA_NEW_VS_RESULT
 199     */
 200    if (key->need_prescale) {
 201       ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 202                         svga->state.hw_clear.prescale.scale );
 203       if (ret)
 204          return ret;
 205
 206       ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 207                         svga->state.hw_clear.prescale.translate );
 208       if (ret)
 209          return ret;
 210    }
 211
 212    /* SVGA_NEW_ZERO_STRIDE
 213     */
 214    if (key->zero_stride_vertex_elements) {
 215       unsigned i, curr_zero_stride = 0;
 216       for (i = 0; i < PIPE_MAX_ATTRIBS; ++i) {
 217          if (key->zero_stride_vertex_elements & (1 << i)) {
 218             ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 219                               svga->curr.zero_stride_constants +
 220                               4 * curr_zero_stride );
 221             if (ret)
 222                return ret;
 223             ++curr_zero_stride;
 224          }
 225       }
 226    }
 227
 228    return 0;
 229 }
 230
 231
 232 struct svga_tracked_state svga_hw_vs_parameters =
 233 {
 234    "hw vs params",
 235    (SVGA_NEW_PRESCALE |
 236     SVGA_NEW_VS_CONST_BUFFER |
 237     SVGA_NEW_ZERO_STRIDE |
 238     SVGA_NEW_VS_RESULT),
 239    emit_vs_consts
 240 };
 241