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 point_sprite_enables;
  41    uint32_t flat_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    /* BRW_NEW_VUE_MAP_GEOM_OUT | BRW_NEW_FRAGMENT_PROGRAM |
  64     * _NEW_POINT | _NEW_LIGHT | _NEW_PROGRAM | BRW_NEW_FS_PROG_DATA
  65     */
  66    calculate_attr_overrides(brw, attr_overrides,
  67                             &point_sprite_enables,
  68                             &flat_enables,
  69                             &urb_entry_read_length);
  70
  71    /* Typically, the URB entry read length and offset should be programmed in
  72     * 3DSTATE_VS and 3DSTATE_GS; SBE inherits it from the last active stage
  73     * which produces geometry.  However, we don't know the proper value until
  74     * we call calculate_attr_overrides().
  75     *
  76     * To fit with our existing code, we override the inherited values and
  77     * specify it here directly, as we did on previous generations.
  78     */
  79    dw1 |=
  80       urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
  81       BRW_SF_URB_ENTRY_READ_OFFSET << GEN8_SBE_URB_ENTRY_READ_OFFSET_SHIFT |
  82       GEN8_SBE_FORCE_URB_ENTRY_READ_LENGTH |
  83       GEN8_SBE_FORCE_URB_ENTRY_READ_OFFSET;
  84
  85    if (brw->gen == 8) {
  86       sbe_cmd_length = 4;
  87    } else {
  88       sbe_cmd_length = 6;
  89
  90       /* prepare the active component dwords */
  91       int input_index = 0;
  92       for (int attr = 0; attr < VARYING_SLOT_MAX; attr++) {
  93          if (!(brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)))
  94             continue;
  95
  96          assert(input_index < 32);
  97
  98          if (input_index < 16)
  99             dw4 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << (input_index << 1));
 100          else
 101             dw5 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << ((input_index - 16) << 1));
 102
 103          ++input_index;
 104       }
 105    }
 106    BEGIN_BATCH(sbe_cmd_length);
 107    OUT_BATCH(_3DSTATE_SBE << 16 | (sbe_cmd_length - 2));
 108    OUT_BATCH(dw1);
 109    OUT_BATCH(point_sprite_enables);
 110    OUT_BATCH(flat_enables);
 111    if (sbe_cmd_length >= 6) {
 112       OUT_BATCH(dw4);
 113       OUT_BATCH(dw5);
 114    }
 115    ADVANCE_BATCH();
 116
 117    BEGIN_BATCH(11);
 118    OUT_BATCH(_3DSTATE_SBE_SWIZ << 16 | (11 - 2));
 119
 120    /* Output DWords 1 through 8: */
 121    for (int i = 0; i < 8; i++) {
 122       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
 123    }
 124
 125    OUT_BATCH(0); /* wrapshortest enables 0-7 */
 126    OUT_BATCH(0); /* wrapshortest enables 8-15 */
 127    ADVANCE_BATCH();
 128 }
 129
 130 const struct brw_tracked_state gen8_sbe_state = {
 131    .dirty = {
 132       .mesa  = _NEW_BUFFERS |
 133                _NEW_LIGHT |
 134                _NEW_POINT |
 135                _NEW_PROGRAM,
 136       .brw   = BRW_NEW_CONTEXT |
 137                BRW_NEW_FRAGMENT_PROGRAM |
 138                BRW_NEW_FS_PROG_DATA |
 139                BRW_NEW_VUE_MAP_GEOM_OUT,
 140    },
 141    .emit = upload_sbe,
 142 };
 143
 144 static void
 145 upload_sf(struct brw_context *brw)
 146 {
 147    struct gl_context *ctx = &brw->ctx;
 148    uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
 149    float point_size;
 150
 151    dw1 = GEN6_SF_STATISTICS_ENABLE;
 152
 153    if (brw->sf.viewport_transform_enable)
 154        dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 155
 156    /* _NEW_LINE */
 157    uint32_t line_width_u3_7 = brw_get_line_width(brw);
 158    if (brw->gen >= 9 || brw->is_cherryview) {
 159       dw1 |= line_width_u3_7 << GEN9_SF_LINE_WIDTH_SHIFT;
 160    } else {
 161       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 162    }
 163
 164    if (ctx->Line.SmoothFlag) {
 165       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 166    }
 167
 168    /* Clamp to ARB_point_parameters user limits */
 169    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 170
 171    /* Clamp to the hardware limits and convert to fixed point */
 172    dw3 |= U_FIXED(CLAMP(point_size, 0.125, 255.875), 3);
 173
 174    /* _NEW_PROGRAM | _NEW_POINT */
 175    if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
 176       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 177
 178    /* _NEW_POINT | _NEW_MULTISAMPLE */
 179    if ((ctx->Point.SmoothFlag || ctx->Multisample._Enabled) &&
 180        !ctx->Point.PointSprite) {
 181       dw3 |= GEN8_SF_SMOOTH_POINT_ENABLE;
 182    }
 183
 184    dw3 |= GEN6_SF_LINE_AA_MODE_TRUE;
 185
 186    /* _NEW_LIGHT */
 187    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 188       dw3 |= (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 189              (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 190              (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 191    } else {
 192       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 193    }
 194
 195    BEGIN_BATCH(4);
 196    OUT_BATCH(_3DSTATE_SF << 16 | (4 - 2));
 197    OUT_BATCH(dw1);
 198    OUT_BATCH(dw2);
 199    OUT_BATCH(dw3);
 200    ADVANCE_BATCH();
 201 }
 202
 203 const struct brw_tracked_state gen8_sf_state = {
 204    .dirty = {
 205       .mesa  = _NEW_LIGHT |
 206                _NEW_PROGRAM |
 207                _NEW_LINE |
 208                _NEW_MULTISAMPLE |
 209                _NEW_POINT,
 210       .brw   = BRW_NEW_CONTEXT,
 211    },
 212    .emit = upload_sf,
 213 };
 214
 215 static void
 216 upload_raster(struct brw_context *brw)
 217 {
 218    struct gl_context *ctx = &brw->ctx;
 219    uint32_t dw1 = 0;
 220
 221    /* _NEW_BUFFERS */
 222    bool render_to_fbo = _mesa_is_user_fbo(brw->ctx.DrawBuffer);
 223
 224    /* _NEW_POLYGON */
 225    if (ctx->Polygon._FrontBit == render_to_fbo)
 226       dw1 |= GEN8_RASTER_FRONT_WINDING_CCW;
 227
 228    if (ctx->Polygon.CullFlag) {
 229       switch (ctx->Polygon.CullFaceMode) {
 230       case GL_FRONT:
 231          dw1 |= GEN8_RASTER_CULL_FRONT;
 232          break;
 233       case GL_BACK:
 234          dw1 |= GEN8_RASTER_CULL_BACK;
 235          break;
 236       case GL_FRONT_AND_BACK:
 237          dw1 |= GEN8_RASTER_CULL_BOTH;
 238          break;
 239       default:
 240          unreachable("not reached");
 241       }
 242    } else {
 243       dw1 |= GEN8_RASTER_CULL_NONE;
 244    }
 245
 246    /* _NEW_POINT */
 247    if (ctx->Point.SmoothFlag)
 248       dw1 |= GEN8_RASTER_SMOOTH_POINT_ENABLE;
 249
 250    if (ctx->Multisample._Enabled)
 251       dw1 |= GEN8_RASTER_API_MULTISAMPLE_ENABLE;
 252
 253    if (ctx->Polygon.OffsetFill)
 254       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 255
 256    if (ctx->Polygon.OffsetLine)
 257       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 258
 259    if (ctx->Polygon.OffsetPoint)
 260       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 261
 262    switch (ctx->Polygon.FrontMode) {
 263    case GL_FILL:
 264       dw1 |= GEN6_SF_FRONT_SOLID;
 265       break;
 266    case GL_LINE:
 267       dw1 |= GEN6_SF_FRONT_WIREFRAME;
 268       break;
 269    case GL_POINT:
 270       dw1 |= GEN6_SF_FRONT_POINT;
 271       break;
 272
 273    default:
 274       unreachable("not reached");
 275    }
 276
 277    switch (ctx->Polygon.BackMode) {
 278    case GL_FILL:
 279       dw1 |= GEN6_SF_BACK_SOLID;
 280       break;
 281    case GL_LINE:
 282       dw1 |= GEN6_SF_BACK_WIREFRAME;
 283       break;
 284    case GL_POINT:
 285       dw1 |= GEN6_SF_BACK_POINT;
 286       break;
 287    default:
 288       unreachable("not reached");
 289    }
 290
 291    /* _NEW_LINE */
 292    if (ctx->Line.SmoothFlag)
 293       dw1 |= GEN8_RASTER_LINE_AA_ENABLE;
 294
 295    /* _NEW_SCISSOR */
 296    if (ctx->Scissor.EnableFlags)
 297       dw1 |= GEN8_RASTER_SCISSOR_ENABLE;
 298
 299    /* _NEW_TRANSFORM */
 300    if (!ctx->Transform.DepthClamp) {
 301       if (brw->gen >= 9) {
 302          dw1 |= GEN9_RASTER_VIEWPORT_Z_NEAR_CLIP_TEST_ENABLE |
 303                 GEN9_RASTER_VIEWPORT_Z_FAR_CLIP_TEST_ENABLE;
 304       } else {
 305          dw1 |= GEN8_RASTER_VIEWPORT_Z_CLIP_TEST_ENABLE;
 306       }
 307    }
 308
 309    BEGIN_BATCH(5);
 310    OUT_BATCH(_3DSTATE_RASTER << 16 | (5 - 2));
 311    OUT_BATCH(dw1);
 312    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 313    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 314    OUT_BATCH_F(ctx->Polygon.OffsetClamp); /* global depth offset clamp */
 315    ADVANCE_BATCH();
 316 }
 317
 318 const struct brw_tracked_state gen8_raster_state = {
 319    .dirty = {
 320       .mesa  = _NEW_BUFFERS |
 321                _NEW_LINE |
 322                _NEW_MULTISAMPLE |
 323                _NEW_POINT |
 324                _NEW_POLYGON |
 325                _NEW_SCISSOR |
 326                _NEW_TRANSFORM,
 327       .brw   = BRW_NEW_CONTEXT,
 328    },
 329    .emit = upload_raster,
 330 };