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    /* CACHE_NEW_WM_PROG */
  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
  43    uint32_t dw1 =
  44       GEN7_SBE_SWIZZLE_ENABLE |
  45       num_outputs << GEN7_SBE_NUM_OUTPUTS_SHIFT;
  46
  47    /* _NEW_BUFFERS */
  48    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  49
  50    /* _NEW_POINT
  51     *
  52     * Window coordinates in an FBO are inverted, which means point
  53     * sprite origin must be inverted.
  54     */
  55    if ((ctx->Point.SpriteOrigin == GL_LOWER_LEFT) != render_to_fbo)
  56       dw1 |= GEN6_SF_POINT_SPRITE_LOWERLEFT;
  57    else
  58       dw1 |= GEN6_SF_POINT_SPRITE_UPPERLEFT;
  59
  60    /* BRW_NEW_VUE_MAP_GEOM_OUT | _NEW_POINT | _NEW_LIGHT | _NEW_PROGRAM |
  61     * CACHE_NEW_WM_PROG
  62     */
  63    calculate_attr_overrides(brw, attr_overrides,
  64                             &point_sprite_enables,
  65                             &flat_enables,
  66                             &urb_entry_read_length);
  67
  68    /* Typically, the URB entry read length and offset should be programmed in
  69     * 3DSTATE_VS and 3DSTATE_GS; SBE inherits it from the last active stage
  70     * which produces geometry.  However, we don't know the proper value until
  71     * we call calculate_attr_overrides().
  72     *
  73     * To fit with our existing code, we override the inherited values and
  74     * specify it here directly, as we did on previous generations.
  75     */
  76    dw1 |=
  77       urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
  78       BRW_SF_URB_ENTRY_READ_OFFSET << GEN8_SBE_URB_ENTRY_READ_OFFSET_SHIFT |
  79       GEN8_SBE_FORCE_URB_ENTRY_READ_LENGTH |
  80       GEN8_SBE_FORCE_URB_ENTRY_READ_OFFSET;
  81
  82    BEGIN_BATCH(4);
  83    OUT_BATCH(_3DSTATE_SBE << 16 | (4 - 2));
  84    OUT_BATCH(dw1);
  85    OUT_BATCH(point_sprite_enables);
  86    OUT_BATCH(flat_enables);
  87    ADVANCE_BATCH();
  88
  89    BEGIN_BATCH(11);
  90    OUT_BATCH(_3DSTATE_SBE_SWIZ << 16 | (11 - 2));
  91
  92    /* Output DWords 1 through 8: */
  93    for (int i = 0; i < 8; i++) {
  94       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
  95    }
  96
  97    OUT_BATCH(0); /* wrapshortest enables 0-7 */
  98    OUT_BATCH(0); /* wrapshortest enables 8-15 */
  99    ADVANCE_BATCH();
 100 }
 101
 102 const struct brw_tracked_state gen8_sbe_state = {
 103    .dirty = {
 104       .mesa  = _NEW_LIGHT | _NEW_POINT,
 105       .brw   = BRW_NEW_CONTEXT |
 106                BRW_NEW_FRAGMENT_PROGRAM |
 107                BRW_NEW_VUE_MAP_GEOM_OUT,
 108       .cache = 0
 109    },
 110    .emit = upload_sbe,
 111 };
 112
 113 static void
 114 upload_sf(struct brw_context *brw)
 115 {
 116    struct gl_context *ctx = &brw->ctx;
 117    uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
 118    float point_size;
 119
 120    dw1 = GEN6_SF_STATISTICS_ENABLE | GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 121
 122    /* _NEW_LINE */
 123    uint32_t line_width_u3_7 = U_FIXED(CLAMP(ctx->Line.Width, 0.0, 7.99), 7);
 124    if (line_width_u3_7 == 0)
 125       line_width_u3_7 = 1;
 126    dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 127
 128    if (ctx->Line.SmoothFlag) {
 129       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 130    }
 131
 132    /* Clamp to ARB_point_parameters user limits */
 133    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 134
 135    /* Clamp to the hardware limits and convert to fixed point */
 136    dw3 |= U_FIXED(CLAMP(point_size, 0.125, 255.875), 3);
 137
 138    /* _NEW_PROGRAM | _NEW_POINT */
 139    if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
 140       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 141
 142    if (ctx->Point.SmoothFlag)
 143       dw3 |= GEN8_SF_SMOOTH_POINT_ENABLE;
 144
 145    dw3 |= GEN6_SF_LINE_AA_MODE_TRUE;
 146
 147    /* _NEW_LIGHT */
 148    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 149       dw3 |= (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 150              (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 151              (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 152    } else {
 153       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 154    }
 155
 156    BEGIN_BATCH(4);
 157    OUT_BATCH(_3DSTATE_SF << 16 | (4 - 2));
 158    OUT_BATCH(dw1);
 159    OUT_BATCH(dw2);
 160    OUT_BATCH(dw3);
 161    ADVANCE_BATCH();
 162 }
 163
 164 const struct brw_tracked_state gen8_sf_state = {
 165    .dirty = {
 166       .mesa  = _NEW_LIGHT |
 167                _NEW_PROGRAM |
 168                _NEW_LINE |
 169                _NEW_POINT,
 170       .brw   = BRW_NEW_CONTEXT,
 171       .cache = 0,
 172    },
 173    .emit = upload_sf,
 174 };
 175
 176 static void
 177 upload_raster(struct brw_context *brw)
 178 {
 179    struct gl_context *ctx = &brw->ctx;
 180    uint32_t dw1 = 0;
 181
 182    /* _NEW_BUFFERS */
 183    bool render_to_fbo = _mesa_is_user_fbo(brw->ctx.DrawBuffer);
 184
 185    /* _NEW_POLYGON */
 186    if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo)
 187       dw1 |= GEN8_RASTER_FRONT_WINDING_CCW;
 188
 189    if (ctx->Polygon.CullFlag) {
 190       switch (ctx->Polygon.CullFaceMode) {
 191       case GL_FRONT:
 192          dw1 |= GEN8_RASTER_CULL_FRONT;
 193          break;
 194       case GL_BACK:
 195          dw1 |= GEN8_RASTER_CULL_BACK;
 196          break;
 197       case GL_FRONT_AND_BACK:
 198          dw1 |= GEN8_RASTER_CULL_BOTH;
 199          break;
 200       default:
 201          assert(0);
 202          break;
 203       }
 204    } else {
 205       dw1 |= GEN8_RASTER_CULL_NONE;
 206    }
 207
 208    /* _NEW_POINT */
 209    if (ctx->Point.SmoothFlag)
 210       dw1 |= GEN8_RASTER_SMOOTH_POINT_ENABLE;
 211
 212    if (ctx->Polygon.OffsetFill)
 213       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 214
 215    if (ctx->Polygon.OffsetLine)
 216       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 217
 218    if (ctx->Polygon.OffsetPoint)
 219       dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 220
 221    switch (ctx->Polygon.FrontMode) {
 222    case GL_FILL:
 223       dw1 |= GEN6_SF_FRONT_SOLID;
 224       break;
 225    case GL_LINE:
 226       dw1 |= GEN6_SF_FRONT_WIREFRAME;
 227       break;
 228    case GL_POINT:
 229       dw1 |= GEN6_SF_FRONT_POINT;
 230       break;
 231
 232    default:
 233       assert(0);
 234       break;
 235    }
 236
 237    switch (ctx->Polygon.BackMode) {
 238    case GL_FILL:
 239       dw1 |= GEN6_SF_BACK_SOLID;
 240       break;
 241    case GL_LINE:
 242       dw1 |= GEN6_SF_BACK_WIREFRAME;
 243       break;
 244    case GL_POINT:
 245       dw1 |= GEN6_SF_BACK_POINT;
 246       break;
 247    default:
 248       assert(0);
 249       break;
 250    }
 251
 252    /* _NEW_LINE */
 253    if (ctx->Line.SmoothFlag)
 254       dw1 |= GEN8_RASTER_LINE_AA_ENABLE;
 255
 256    /* _NEW_SCISSOR */
 257    if (ctx->Scissor.EnableFlags)
 258       dw1 |= GEN8_RASTER_SCISSOR_ENABLE;
 259
 260    /* _NEW_TRANSFORM */
 261    if (!ctx->Transform.DepthClamp)
 262       dw1 |= GEN8_RASTER_VIEWPORT_Z_CLIP_TEST_ENABLE;
 263
 264    BEGIN_BATCH(5);
 265    OUT_BATCH(_3DSTATE_RASTER << 16 | (5 - 2));
 266    OUT_BATCH(dw1);
 267    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 268    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 269    OUT_BATCH_F(0.0);
 270    ADVANCE_BATCH();
 271 }
 272
 273 const struct brw_tracked_state gen8_raster_state = {
 274    .dirty = {
 275       .mesa  = _NEW_BUFFERS |
 276                _NEW_LINE |
 277                _NEW_POINT |
 278                _NEW_POLYGON |
 279                _NEW_SCISSOR |
 280                _NEW_TRANSFORM,
 281       .brw   = BRW_NEW_CONTEXT,
 282       .cache = 0,
 283    },
 284    .emit = upload_raster,
 285 };