src/mesa/drivers/dri/i965/gen8_sf_state.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "brw_context.h"
  25 #include "brw_state.h"
  26 #include "brw_defines.h"
  27 #include "brw_util.h"
  28 #include "main/macros.h"
  29 #include "main/fbobject.h"
  30 #include "intel_batchbuffer.h"
  31
  32 static void
  33 upload_sbe(struct brw_context *brw)
  34 {
  35    struct gl_context *ctx = &brw->ctx;
  36    /* BRW_NEW_FS_PROG_DATA */
  37    uint32_t num_outputs = brw->wm.prog_data->num_varying_inputs;
  38    uint16_t attr_overrides[VARYING_SLOT_MAX];
  39    uint32_t urb_entry_read_length;
  40    uint32_t urb_entry_read_offset;
  41    uint32_t point_sprite_enables;
  42    int sbe_cmd_length;
  43
  44    uint32_t dw1 =
  45       GEN7_SBE_SWIZZLE_ENABLE |
  46       num_outputs << GEN7_SBE_NUM_OUTPUTS_SHIFT;
  47    uint32_t dw4 = 0;
  48    uint32_t dw5 = 0;
  49
  50    /* _NEW_BUFFERS */
  51    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  52
  53    /* _NEW_POINT
  54     *
  55     * Window coordinates in an FBO are inverted, which means point
  56     * sprite origin must be inverted.
  57     */
  58    if ((ctx->Point.SpriteOrigin == GL_LOWER_LEFT) != render_to_fbo)
  59       dw1 |= GEN6_SF_POINT_SPRITE_LOWERLEFT;
  60    else
  61       dw1 |= GEN6_SF_POINT_SPRITE_UPPERLEFT;
  62
  63    /* _NEW_POINT | _NEW_LIGHT | _NEW_PROGRAM,
  64     * BRW_NEW_FS_PROG_DATA | BRW_NEW_FRAGMENT_PROGRAM |
  65     * BRW_NEW_GS_PROG_DATA | BRW_NEW_PRIMITIVE | BRW_NEW_TES_PROG_DATA |
  66     * BRW_NEW_VUE_MAP_GEOM_OUT
  67     */
  68    calculate_attr_overrides(brw, attr_overrides,
  69                             &point_sprite_enables,
  70                             &urb_entry_read_length,
  71                             &urb_entry_read_offset);
  72
  73    /* Typically, the URB entry read length and offset should be programmed in
  74     * 3DSTATE_VS and 3DSTATE_GS; SBE inherits it from the last active stage
  75     * which produces geometry.  However, we don't know the proper value until
  76     * we call calculate_attr_overrides().
  77     *
  78     * To fit with our existing code, we override the inherited values and
  79     * specify it here directly, as we did on previous generations.
  80     */
  81    dw1 |=
  82       urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
  83       urb_entry_read_offset << GEN8_SBE_URB_ENTRY_READ_OFFSET_SHIFT |
  84       GEN8_SBE_FORCE_URB_ENTRY_READ_LENGTH |
  85       GEN8_SBE_FORCE_URB_ENTRY_READ_OFFSET;
  86
  87    if (brw->gen == 8) {
  88       sbe_cmd_length = 4;
  89    } else {
  90       sbe_cmd_length = 6;
  91
  92       /* prepare the active component dwords */
  93       int input_index = 0;
  94       for (int attr = 0; attr < VARYING_SLOT_MAX; attr++) {
  95          if (!(brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)))
  96             continue;
  97
  98          assert(input_index < 32);
  99
 100          if (input_index < 16)
 101             dw4 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << (input_index << 1));
 102          else
 103             dw5 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << ((input_index - 16) << 1));
 104
 105          ++input_index;
 106       }
 107    }
 108    BEGIN_BATCH(sbe_cmd_length);
 109    OUT_BATCH(_3DSTATE_SBE << 16 | (sbe_cmd_length - 2));
 110    OUT_BATCH(dw1);
 111    OUT_BATCH(point_sprite_enables);
 112    OUT_BATCH(brw->wm.prog_data->flat_inputs);
 113    if (sbe_cmd_length >= 6) {
 114       OUT_BATCH(dw4);
 115       OUT_BATCH(dw5);
 116    }
 117    ADVANCE_BATCH();
 118
 119    BEGIN_BATCH(11);
 120    OUT_BATCH(_3DSTATE_SBE_SWIZ << 16 | (11 - 2));
 121
 122    /* Output DWords 1 through 8: */
 123    for (int i = 0; i < 8; i++) {
 124       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
 125    }
 126
 127    OUT_BATCH(0); /* wrapshortest enables 0-7 */
 128    OUT_BATCH(0); /* wrapshortest enables 8-15 */
 129    ADVANCE_BATCH();
 130 }
 131
 132 const struct brw_tracked_state gen8_sbe_state = {
 133    .dirty = {
 134       .mesa  = _NEW_BUFFERS |
 135                _NEW_LIGHT |
 136                _NEW_POINT |
 137                _NEW_POLYGON |
 138                _NEW_PROGRAM,
 139       .brw   = BRW_NEW_BLORP |
 140                BRW_NEW_CONTEXT |
 141                BRW_NEW_FRAGMENT_PROGRAM |
 142                BRW_NEW_FS_PROG_DATA |
 143                BRW_NEW_GS_PROG_DATA |
 144                BRW_NEW_TES_PROG_DATA |
 145                BRW_NEW_VUE_MAP_GEOM_OUT,
 146    },
 147    .emit = upload_sbe,
 148 };
 149
 150 static void
 151 upload_sf(struct brw_context *brw)
 152 {
 153    struct gl_context *ctx = &brw->ctx;
 154    uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
 155    float point_size;
 156
 157    dw1 = GEN6_SF_STATISTICS_ENABLE;
 158
 159    if (brw->sf.viewport_transform_enable)
 160        dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 161
 162    /* _NEW_LINE */
 163    uint32_t line_width_u3_7 = brw_get_line_width(brw);
 164    if (brw->gen >= 9 || brw->is_cherryview) {
 165       dw1 |= line_width_u3_7 << GEN9_SF_LINE_WIDTH_SHIFT;
 166    } else {
 167       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 168    }
 169
 170    if (ctx->Line.SmoothFlag) {
 171       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 172    }
 173
 174    /* _NEW_POINT - Clamp to ARB_point_parameters user limits */
 175    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 176
 177    /* Clamp to the hardware limits and convert to fixed point */
 178    dw3 |= U_FIXED(CLAMP(point_size, 0.125f, 255.875f), 3);
 179
 180    /* _NEW_PROGRAM | _NEW_POINT, BRW_NEW_VUE_MAP_GEOM_OUT */
 181    if (use_state_point_size(brw))
 182       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 183
 184    /* _NEW_POINT | _NEW_MULTISAMPLE */
 185    if ((ctx->Point.SmoothFlag || _mesa_is_multisample_enabled(ctx)) &&
 186        !ctx->Point.PointSprite) {
 187       dw3 |= GEN8_SF_SMOOTH_POINT_ENABLE;
 188    }
 189
 190    dw3 |= GEN6_SF_LINE_AA_MODE_TRUE;
 191
 192    /* _NEW_LIGHT */
 193    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 194       dw3 |= (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 195              (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 196              (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 197    } else {
 198       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 199    }
 200
 201    BEGIN_BATCH(4);
 202    OUT_BATCH(_3DSTATE_SF << 16 | (4 - 2));
 203    OUT_BATCH(dw1);
 204    OUT_BATCH(dw2);
 205    OUT_BATCH(dw3);
 206    ADVANCE_BATCH();
 207 }
 208
 209 const struct brw_tracked_state gen8_sf_state = {
 210    .dirty = {
 211       .mesa  = _NEW_LIGHT |
 212                _NEW_PROGRAM |
 213                _NEW_LINE |
 214                _NEW_MULTISAMPLE |
 215                _NEW_POINT,
 216       .brw   = BRW_NEW_BLORP |
 217                BRW_NEW_CONTEXT |
 218                BRW_NEW_VUE_MAP_GEOM_OUT,
 219    },
 220    .emit = upload_sf,
 221 };
 222
 223 static void
 224 upload_raster(struct brw_context *brw)
 225 {
 226    struct gl_context *ctx = &brw->ctx;
 227    uint32_t dw1 = 0;
 228
 229    /* _NEW_BUFFERS */
 230    bool render_to_fbo = _mesa_is_user_fbo(brw->ctx.DrawBuffer);
 231
 232    /* _NEW_POLYGON */
 233    if (ctx->Polygon._FrontBit == render_to_fbo)
 234       dw1 |= GEN8_RASTER_FRONT_WINDING_CCW;
 235
 236    if (ctx->Polygon.CullFlag) {
 237       switch (ctx->Polygon.CullFaceMode) {
 238       case GL_FRONT:
 239          dw1 |= GEN8_RASTER_CULL_FRONT;
 240          break;
 241       case GL_BACK:
 242          dw1 |= GEN8_RASTER_CULL_BACK;
 243          break;
 244       case GL_FRONT_AND_BACK:
 245          dw1 |= GEN8_RASTER_CULL_BOTH;
 246          break;
 247       default:
 248          unreachable("not reached");
 249       }
 250    } else {
 251       dw1 |= GEN8_RASTER_CULL_NONE;
 252    }
 253
 254    /* _NEW_POINT */
 255    if (ctx->Point.SmoothFlag)
 256       dw1 |= GEN8_RASTER_SMOOTH_POINT_ENABLE;
 257
 258    if (_mesa_is_multisample_enabled(ctx))
 259       dw1 |= GEN8_RASTER_API_MULTISAMPLE_ENABLE;
 260
 261    if (ctx->Polygon.OffsetFill)
 262       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 263
 264    if (ctx->Polygon.OffsetLine)
 265       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 266
 267    if (ctx->Polygon.OffsetPoint)
 268       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 269
 270    switch (ctx->Polygon.FrontMode) {
 271    case GL_FILL:
 272       dw1 |= GEN6_SF_FRONT_SOLID;
 273       break;
 274    case GL_LINE:
 275       dw1 |= GEN6_SF_FRONT_WIREFRAME;
 276       break;
 277    case GL_POINT:
 278       dw1 |= GEN6_SF_FRONT_POINT;
 279       break;
 280
 281    default:
 282       unreachable("not reached");
 283    }
 284
 285    switch (ctx->Polygon.BackMode) {
 286    case GL_FILL:
 287       dw1 |= GEN6_SF_BACK_SOLID;
 288       break;
 289    case GL_LINE:
 290       dw1 |= GEN6_SF_BACK_WIREFRAME;
 291       break;
 292    case GL_POINT:
 293       dw1 |= GEN6_SF_BACK_POINT;
 294       break;
 295    default:
 296       unreachable("not reached");
 297    }
 298
 299    /* _NEW_LINE */
 300    if (ctx->Line.SmoothFlag)
 301       dw1 |= GEN8_RASTER_LINE_AA_ENABLE;
 302
 303    /* _NEW_SCISSOR */
 304    if (ctx->Scissor.EnableFlags)
 305       dw1 |= GEN8_RASTER_SCISSOR_ENABLE;
 306
 307    /* _NEW_TRANSFORM */
 308    if (!ctx->Transform.DepthClamp) {
 309       if (brw->gen >= 9) {
 310          dw1 |= GEN9_RASTER_VIEWPORT_Z_NEAR_CLIP_TEST_ENABLE |
 311                 GEN9_RASTER_VIEWPORT_Z_FAR_CLIP_TEST_ENABLE;
 312       } else {
 313          dw1 |= GEN8_RASTER_VIEWPORT_Z_CLIP_TEST_ENABLE;
 314       }
 315    }
 316
 317    BEGIN_BATCH(5);
 318    OUT_BATCH(_3DSTATE_RASTER << 16 | (5 - 2));
 319    OUT_BATCH(dw1);
 320    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 321    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 322    OUT_BATCH_F(ctx->Polygon.OffsetClamp); /* global depth offset clamp */
 323    ADVANCE_BATCH();
 324 }
 325
 326 const struct brw_tracked_state gen8_raster_state = {
 327    .dirty = {
 328       .mesa  = _NEW_BUFFERS |
 329                _NEW_LINE |
 330                _NEW_MULTISAMPLE |
 331                _NEW_POINT |
 332                _NEW_POLYGON |
 333                _NEW_SCISSOR |
 334                _NEW_TRANSFORM,
 335       .brw   = BRW_NEW_BLORP |
 336                BRW_NEW_CONTEXT,
 337    },
 338    .emit = upload_raster,
 339 };