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 shader )
  44 {
  45    assert(PIPE_SHADER_VERTEX + 1 == SVGA3D_SHADERTYPE_VS);
  46    assert(PIPE_SHADER_FRAGMENT + 1 == SVGA3D_SHADERTYPE_PS);
  47    assert(shader <= PIPE_SHADER_FRAGMENT);
  48    return shader + 1;
  49 }
  50
  51
  52 static int emit_const( struct svga_context *svga,
  53                        int unit,
  54                        int i,
  55                        const float *value )
  56 {
  57    int ret = PIPE_OK;
  58
  59    if (memcmp(svga->state.hw_draw.cb[unit][i], value, 4 * sizeof(float)) != 0) {
  60       if (SVGA_DEBUG & DEBUG_CONSTS)
  61          debug_printf("%s %s %d: %f %f %f %f\n",
  62                       __FUNCTION__,
  63                       unit == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
  64                       i,
  65                       value[0],
  66                       value[1],
  67                       value[2],
  68                       value[3]);
  69
  70       ret = SVGA3D_SetShaderConst( svga->swc,
  71                                    i,
  72                                    svga_shader_type(unit),
  73                                    SVGA3D_CONST_TYPE_FLOAT,
  74                                    value );
  75       if (ret)
  76          return ret;
  77
  78       memcpy(svga->state.hw_draw.cb[unit][i], value, 4 * sizeof(float));
  79    }
  80
  81    return ret;
  82 }
  83
  84 static int emit_consts( struct svga_context *svga,
  85                         int offset,
  86                         int unit )
  87 {
  88    struct pipe_transfer *transfer = NULL;
  89    unsigned count;
  90    const float (*data)[4] = NULL;
  91    unsigned i;
  92    int ret = PIPE_OK;
  93
  94    if (svga->curr.cb[unit] == NULL)
  95       goto done;
  96
  97    count = svga->curr.cb[unit]->width0 / (4 * sizeof(float));
  98
  99    data = (const float (*)[4])pipe_buffer_map(&svga->pipe,
 100                                               svga->curr.cb[unit],
 101                                               PIPE_TRANSFER_READ,
 102                                               &transfer);
 103    if (data == NULL) {
 104       ret = PIPE_ERROR_OUT_OF_MEMORY;
 105       goto done;
 106    }
 107
 108    for (i = 0; i < count; i++) {
 109       ret = emit_const( svga, unit, offset + i, data[i] );
 110       if (ret)
 111          goto done;
 112    }
 113
 114 done:
 115    if (data)
 116       pipe_buffer_unmap(&svga->pipe, transfer);
 117
 118    return ret;
 119 }
 120
 121 static int emit_fs_consts( struct svga_context *svga,
 122                            unsigned dirty )
 123 {
 124    const struct svga_shader_result *result = svga->state.hw_draw.fs;
 125    const struct svga_fs_compile_key *key = &result->key.fkey;
 126    int ret = 0;
 127
 128    ret = emit_consts( svga, 0, PIPE_SHADER_FRAGMENT );
 129    if (ret)
 130       return ret;
 131
 132    /* The internally generated fragment shader for xor blending
 133     * doesn't have a 'result' struct.  It should be fixed to avoid
 134     * this special case, but work around it with a NULL check:
 135     */
 136    if (result != NULL &&
 137        key->num_unnormalized_coords)
 138    {
 139       unsigned offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 140       int i;
 141
 142       for (i = 0; i < key->num_textures; i++) {
 143          if (key->tex[i].unnormalized) {
 144             struct pipe_resource *tex = svga->curr.sampler_views[i]->texture;
 145             float data[4];
 146
 147             data[0] = 1.0 / (float)tex->width0;
 148             data[1] = 1.0 / (float)tex->height0;
 149             data[2] = 1.0;
 150             data[3] = 1.0;
 151
 152             ret = emit_const( svga,
 153                               PIPE_SHADER_FRAGMENT,
 154                               key->tex[i].width_height_idx + offset,
 155                               data );
 156             if (ret)
 157                return ret;
 158          }
 159       }
 160
 161       offset += key->num_unnormalized_coords;
 162    }
 163
 164    return 0;
 165 }
 166
 167
 168 struct svga_tracked_state svga_hw_fs_parameters =
 169 {
 170    "hw fs params",
 171    (SVGA_NEW_FS_CONST_BUFFER |
 172     SVGA_NEW_FS_RESULT |
 173     SVGA_NEW_TEXTURE_BINDING),
 174    emit_fs_consts
 175 };
 176
 177 /***********************************************************************
 178  */
 179
 180 static int emit_vs_consts( struct svga_context *svga,
 181                            unsigned dirty )
 182 {
 183    const struct svga_shader_result *result = svga->state.hw_draw.vs;
 184    const struct svga_vs_compile_key *key = &result->key.vkey;
 185    int ret = 0;
 186    unsigned offset;
 187
 188    /* SVGA_NEW_VS_RESULT
 189     */
 190    if (result == NULL)
 191       return 0;
 192
 193    /* SVGA_NEW_VS_CONST_BUFFER
 194     */
 195    ret = emit_consts( svga, 0, PIPE_SHADER_VERTEX );
 196    if (ret)
 197       return ret;
 198
 199    offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
 200
 201    /* SVGA_NEW_VS_RESULT
 202     */
 203    if (key->need_prescale) {
 204       ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 205                         svga->state.hw_clear.prescale.scale );
 206       if (ret)
 207          return ret;
 208
 209       ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 210                         svga->state.hw_clear.prescale.translate );
 211       if (ret)
 212          return ret;
 213    }
 214
 215    /* SVGA_NEW_ZERO_STRIDE
 216     */
 217    if (key->zero_stride_vertex_elements) {
 218       unsigned i, curr_zero_stride = 0;
 219       for (i = 0; i < PIPE_MAX_ATTRIBS; ++i) {
 220          if (key->zero_stride_vertex_elements & (1 << i)) {
 221             ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
 222                               svga->curr.zero_stride_constants +
 223                               4 * curr_zero_stride );
 224             if (ret)
 225                return ret;
 226             ++curr_zero_stride;
 227          }
 228       }
 229    }
 230
 231    return 0;
 232 }
 233
 234
 235 struct svga_tracked_state svga_hw_vs_parameters =
 236 {
 237    "hw vs params",
 238    (SVGA_NEW_PRESCALE |
 239     SVGA_NEW_VS_CONST_BUFFER |
 240     SVGA_NEW_ZERO_STRIDE |
 241     SVGA_NEW_VS_RESULT),
 242    emit_vs_consts
 243 };
 244