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          if (input_index < 16)
  97             dw4 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << (input_index << 1));
  98          else
  99             dw5 |= (GEN9_SBE_ACTIVE_COMPONENT_XYZW << (input_index << 1));
 100
 101          ++input_index;
 102       }
 103    }
 104    BEGIN_BATCH(sbe_cmd_length);
 105    OUT_BATCH(_3DSTATE_SBE << 16 | (sbe_cmd_length - 2));
 106    OUT_BATCH(dw1);
 107    OUT_BATCH(point_sprite_enables);
 108    OUT_BATCH(flat_enables);
 109    if (sbe_cmd_length >= 6) {
 110       OUT_BATCH(dw4);
 111       OUT_BATCH(dw5);
 112    }
 113    ADVANCE_BATCH();
 114
 115    BEGIN_BATCH(11);
 116    OUT_BATCH(_3DSTATE_SBE_SWIZ << 16 | (11 - 2));
 117
 118    /* Output DWords 1 through 8: */
 119    for (int i = 0; i < 8; i++) {
 120       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
 121    }
 122
 123    OUT_BATCH(0); /* wrapshortest enables 0-7 */
 124    OUT_BATCH(0); /* wrapshortest enables 8-15 */
 125    ADVANCE_BATCH();
 126 }
 127
 128 const struct brw_tracked_state gen8_sbe_state = {
 129    .dirty = {
 130       .mesa  = _NEW_BUFFERS |
 131                _NEW_LIGHT |
 132                _NEW_POINT |
 133                _NEW_PROGRAM,
 134       .brw   = BRW_NEW_CONTEXT |
 135                BRW_NEW_FRAGMENT_PROGRAM |
 136                BRW_NEW_VUE_MAP_GEOM_OUT,
 137       .cache = BRW_NEW_FS_PROG_DATA,
 138    },
 139    .emit = upload_sbe,
 140 };
 141
 142 static void
 143 upload_sf(struct brw_context *brw)
 144 {
 145    struct gl_context *ctx = &brw->ctx;
 146    uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
 147    float point_size;
 148
 149    dw1 = GEN6_SF_STATISTICS_ENABLE;
 150
 151    if (brw->sf.viewport_transform_enable)
 152        dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 153
 154    /* _NEW_LINE */
 155    uint32_t line_width_u3_7 =
 156       U_FIXED(CLAMP(ctx->Line.Width, 0.0, ctx->Const.MaxLineWidth), 7);
 157    if (line_width_u3_7 == 0)
 158       line_width_u3_7 = 1;
 159    if (brw->gen >= 9 || brw->is_cherryview) {
 160       dw1 |= line_width_u3_7 << GEN9_SF_LINE_WIDTH_SHIFT;
 161    } else {
 162       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 163    }
 164
 165    if (ctx->Line.SmoothFlag) {
 166       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 167    }
 168
 169    /* Clamp to ARB_point_parameters user limits */
 170    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 171
 172    /* Clamp to the hardware limits and convert to fixed point */
 173    dw3 |= U_FIXED(CLAMP(point_size, 0.125, 255.875), 3);
 174
 175    /* _NEW_PROGRAM | _NEW_POINT */
 176    if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
 177       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 178
 179    /* _NEW_POINT | _NEW_MULTISAMPLE */
 180    if ((ctx->Point.SmoothFlag || ctx->Multisample._Enabled) &&
 181        !ctx->Point.PointSprite) {
 182       dw3 |= GEN8_SF_SMOOTH_POINT_ENABLE;
 183    }
 184
 185    dw3 |= GEN6_SF_LINE_AA_MODE_TRUE;
 186
 187    /* _NEW_LIGHT */
 188    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 189       dw3 |= (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 190              (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 191              (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 192    } else {
 193       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 194    }
 195
 196    BEGIN_BATCH(4);
 197    OUT_BATCH(_3DSTATE_SF << 16 | (4 - 2));
 198    OUT_BATCH(dw1);
 199    OUT_BATCH(dw2);
 200    OUT_BATCH(dw3);
 201    ADVANCE_BATCH();
 202 }
 203
 204 const struct brw_tracked_state gen8_sf_state = {
 205    .dirty = {
 206       .mesa  = _NEW_LIGHT |
 207                _NEW_PROGRAM |
 208                _NEW_LINE |
 209                _NEW_MULTISAMPLE |
 210                _NEW_POINT,
 211       .brw   = BRW_NEW_CONTEXT,
 212       .cache = 0,
 213    },
 214    .emit = upload_sf,
 215 };
 216
 217 static void
 218 upload_raster(struct brw_context *brw)
 219 {
 220    struct gl_context *ctx = &brw->ctx;
 221    uint32_t dw1 = 0;
 222
 223    /* _NEW_BUFFERS */
 224    bool render_to_fbo = _mesa_is_user_fbo(brw->ctx.DrawBuffer);
 225
 226    /* _NEW_POLYGON */
 227    if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo)
 228       dw1 |= GEN8_RASTER_FRONT_WINDING_CCW;
 229
 230    if (ctx->Polygon.CullFlag) {
 231       switch (ctx->Polygon.CullFaceMode) {
 232       case GL_FRONT:
 233          dw1 |= GEN8_RASTER_CULL_FRONT;
 234          break;
 235       case GL_BACK:
 236          dw1 |= GEN8_RASTER_CULL_BACK;
 237          break;
 238       case GL_FRONT_AND_BACK:
 239          dw1 |= GEN8_RASTER_CULL_BOTH;
 240          break;
 241       default:
 242          unreachable("not reached");
 243       }
 244    } else {
 245       dw1 |= GEN8_RASTER_CULL_NONE;
 246    }
 247
 248    /* _NEW_POINT */
 249    if (ctx->Point.SmoothFlag)
 250       dw1 |= GEN8_RASTER_SMOOTH_POINT_ENABLE;
 251
 252    if (ctx->Multisample._Enabled)
 253       dw1 |= GEN8_RASTER_API_MULTISAMPLE_ENABLE;
 254
 255    if (ctx->Polygon.OffsetFill)
 256       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 257
 258    if (ctx->Polygon.OffsetLine)
 259       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 260
 261    if (ctx->Polygon.OffsetPoint)
 262       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 263
 264    switch (ctx->Polygon.FrontMode) {
 265    case GL_FILL:
 266       dw1 |= GEN6_SF_FRONT_SOLID;
 267       break;
 268    case GL_LINE:
 269       dw1 |= GEN6_SF_FRONT_WIREFRAME;
 270       break;
 271    case GL_POINT:
 272       dw1 |= GEN6_SF_FRONT_POINT;
 273       break;
 274
 275    default:
 276       unreachable("not reached");
 277    }
 278
 279    switch (ctx->Polygon.BackMode) {
 280    case GL_FILL:
 281       dw1 |= GEN6_SF_BACK_SOLID;
 282       break;
 283    case GL_LINE:
 284       dw1 |= GEN6_SF_BACK_WIREFRAME;
 285       break;
 286    case GL_POINT:
 287       dw1 |= GEN6_SF_BACK_POINT;
 288       break;
 289    default:
 290       unreachable("not reached");
 291    }
 292
 293    /* _NEW_LINE */
 294    if (ctx->Line.SmoothFlag)
 295       dw1 |= GEN8_RASTER_LINE_AA_ENABLE;
 296
 297    /* _NEW_SCISSOR */
 298    if (ctx->Scissor.EnableFlags)
 299       dw1 |= GEN8_RASTER_SCISSOR_ENABLE;
 300
 301    /* _NEW_TRANSFORM */
 302    if (!ctx->Transform.DepthClamp) {
 303       if (brw->gen >= 9) {
 304          dw1 |= GEN9_RASTER_VIEWPORT_Z_NEAR_CLIP_TEST_ENABLE |
 305                 GEN9_RASTER_VIEWPORT_Z_FAR_CLIP_TEST_ENABLE;
 306       } else {
 307          dw1 |= GEN8_RASTER_VIEWPORT_Z_CLIP_TEST_ENABLE;
 308       }
 309    }
 310
 311    BEGIN_BATCH(5);
 312    OUT_BATCH(_3DSTATE_RASTER << 16 | (5 - 2));
 313    OUT_BATCH(dw1);
 314    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 315    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 316    OUT_BATCH_F(0.0);
 317    ADVANCE_BATCH();
 318 }
 319
 320 const struct brw_tracked_state gen8_raster_state = {
 321    .dirty = {
 322       .mesa  = _NEW_BUFFERS |
 323                _NEW_LINE |
 324                _NEW_MULTISAMPLE |
 325                _NEW_POINT |
 326                _NEW_POLYGON |
 327                _NEW_SCISSOR |
 328                _NEW_TRANSFORM,
 329       .brw   = BRW_NEW_CONTEXT,
 330       .cache = 0,
 331    },
 332    .emit = upload_raster,
 333 };