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 "pipe/p_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_screen *screen = svga->pipe.screen;
  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]->size / (4 * sizeof(float));
  95
  96    data = (const float (*)[4])pipe_buffer_map(screen,
  97                                               svga->curr.cb[unit],
  98                                               PIPE_BUFFER_USAGE_CPU_READ);
  99    if (data == NULL) {
 100       ret = PIPE_ERROR_OUT_OF_MEMORY;
 101       goto done;
 102    }
 103
 104    for (i = 0; i < count; i++) {
 105       ret = emit_const( svga, unit, offset + i, data[i] );
 106       if (ret)
 107          goto done;
 108    }
 109
 110 done:
 111    if (data)
 112       pipe_buffer_unmap(screen, svga->curr.cb[unit]);
 113
 114    return ret;
 115 }
 116
 117 static int emit_fs_consts( struct svga_context *svga,
 118                            unsigned dirty )
 119 {
 120    const struct svga_shader_result *result = svga->state.hw_draw.fs;
 121    const struct svga_fs_compile_key *key = &result->key.fkey;
 122    int ret = 0;
 123
 124    ret = emit_consts( svga, 0, PIPE_SHADER_FRAGMENT );
 125    if (ret)
 126       return ret;
 127
 128    /* The internally generated fragment shader for xor blending
 129     * doesn't have a 'result' struct.  It should be fixed to avoid
 130     * this special case, but work around it with a NULL check:
 131     */
 132    if (result != NULL &&
 133        key->num_unnormalized_coords)
 134    {
 135       unsigned offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 136       int i;
 137
 138       for (i = 0; i < key->num_textures; i++) {
 139          if (key->tex[i].unnormalized) {
 140             struct pipe_texture *tex = svga->curr.texture[i];
 141             float data[4];
 142
 143             data[0] = 1.0 / (float)tex->width0;
 144             data[1] = 1.0 / (float)tex->height0;
 145             data[2] = 1.0;
 146             data[3] = 1.0;
 147
 148             ret = emit_const( svga,
 149                               PIPE_SHADER_FRAGMENT,
 150                               key->tex[i].width_height_idx + offset,
 151                               data );
 152             if (ret)
 153                return ret;
 154          }
 155       }
 156
 157       offset += key->num_unnormalized_coords;
 158    }
 159
 160    return 0;
 161 }
 162
 163
 164 struct svga_tracked_state svga_hw_fs_parameters =
 165 {
 166    "hw fs params",
 167    (SVGA_NEW_FS_CONST_BUFFER |
 168     SVGA_NEW_FS_RESULT |
 169     SVGA_NEW_TEXTURE_BINDING),
 170    emit_fs_consts
 171 };
 172
 173 /***********************************************************************
 174  */
 175
 176 static int emit_vs_consts( struct svga_context *svga,
 177                            unsigned dirty )
 178 {
 179    const struct svga_shader_result *result = svga->state.hw_draw.vs;
 180    const struct svga_vs_compile_key *key = &result->key.vkey;
 181    int ret = 0;
 182    unsigned offset;
 183
 184    /* SVGA_NEW_VS_RESULT
 185     */
 186    if (result == NULL)
 187       return 0;
 188
 189    /* SVGA_NEW_VS_CONST_BUFFER
 190     */
 191    ret = emit_consts( svga, 0, PIPE_SHADER_VERTEX );
 192    if (ret)
 193       return ret;
 194
 195    offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 196
 197    /* SVGA_NEW_VS_RESULT
 198     */
 199    if (key->need_prescale) {
 200       ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 201                         svga->state.hw_clear.prescale.scale );
 202       if (ret)
 203          return ret;
 204
 205       ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 206                         svga->state.hw_clear.prescale.translate );
 207       if (ret)
 208          return ret;
 209    }
 210
 211    /* SVGA_NEW_ZERO_STRIDE
 212     */
 213    if (key->zero_stride_vertex_elements) {
 214       unsigned i, curr_zero_stride = 0;
 215       for (i = 0; i < PIPE_MAX_ATTRIBS; ++i) {
 216          if (key->zero_stride_vertex_elements & (1 << i)) {
 217             ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 218                               svga->curr.zero_stride_constants +
 219                               4 * curr_zero_stride );
 220             if (ret)
 221                return ret;
 222             ++curr_zero_stride;
 223          }
 224       }
 225    }
 226
 227    return 0;
 228 }
 229
 230
 231 struct svga_tracked_state svga_hw_vs_parameters =
 232 {
 233    "hw vs params",
 234    (SVGA_NEW_PRESCALE |
 235     SVGA_NEW_VS_CONST_BUFFER |
 236     SVGA_NEW_ZERO_STRIDE |
 237     SVGA_NEW_VS_RESULT),
 238    emit_vs_consts
 239 };
 240