src/mesa/drivers/dri/i965/gen7_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 "main/framebuffer.h"
  31 #include "intel_batchbuffer.h"
  32
  33 static void
  34 upload_sbe_state(struct brw_context *brw)
  35 {
  36    struct gl_context *ctx = &brw->ctx;
  37    /* BRW_NEW_FS_PROG_DATA */
  38    uint32_t num_outputs = brw->wm.prog_data->num_varying_inputs;
  39    uint32_t dw1;
  40    uint32_t point_sprite_enables;
  41    uint32_t flat_enables;
  42    int i;
  43    uint16_t attr_overrides[16];
  44    /* _NEW_BUFFERS */
  45    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  46    uint32_t point_sprite_origin;
  47
  48    /* FINISHME: Attribute Swizzle Control Mode? */
  49    dw1 = GEN7_SBE_SWIZZLE_ENABLE | num_outputs << GEN7_SBE_NUM_OUTPUTS_SHIFT;
  50
  51    /* _NEW_POINT
  52     *
  53     * Window coordinates in an FBO are inverted, which means point
  54     * sprite origin must be inverted.
  55     */
  56    if ((ctx->Point.SpriteOrigin == GL_LOWER_LEFT) != render_to_fbo) {
  57       point_sprite_origin = GEN6_SF_POINT_SPRITE_LOWERLEFT;
  58    } else {
  59       point_sprite_origin = GEN6_SF_POINT_SPRITE_UPPERLEFT;
  60    }
  61    dw1 |= point_sprite_origin;
  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    uint32_t urb_entry_read_length;
  67    uint32_t urb_entry_read_offset;
  68    calculate_attr_overrides(brw, attr_overrides, &point_sprite_enables,
  69                             &flat_enables, &urb_entry_read_length,
  70                             &urb_entry_read_offset);
  71    dw1 |= urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
  72           urb_entry_read_offset << GEN7_SBE_URB_ENTRY_READ_OFFSET_SHIFT;
  73
  74    BEGIN_BATCH(14);
  75    OUT_BATCH(_3DSTATE_SBE << 16 | (14 - 2));
  76    OUT_BATCH(dw1);
  77
  78    /* Output dwords 2 through 9 */
  79    for (i = 0; i < 8; i++) {
  80       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
  81    }
  82
  83    OUT_BATCH(point_sprite_enables); /* dw10 */
  84    OUT_BATCH(flat_enables);
  85    OUT_BATCH(0); /* wrapshortest enables 0-7 */
  86    OUT_BATCH(0); /* wrapshortest enables 8-15 */
  87    ADVANCE_BATCH();
  88 }
  89
  90 const struct brw_tracked_state gen7_sbe_state = {
  91    .dirty = {
  92       .mesa  = _NEW_BUFFERS |
  93                _NEW_LIGHT |
  94                _NEW_POINT |
  95                _NEW_PROGRAM,
  96       .brw   = BRW_NEW_CONTEXT |
  97                BRW_NEW_FRAGMENT_PROGRAM |
  98                BRW_NEW_FS_PROG_DATA |
  99                BRW_NEW_GEOMETRY_PROGRAM |
 100                BRW_NEW_PRIMITIVE |
 101                BRW_NEW_VUE_MAP_GEOM_OUT,
 102    },
 103    .emit = upload_sbe_state,
 104 };
 105
 106 static void
 107 upload_sf_state(struct brw_context *brw)
 108 {
 109    struct gl_context *ctx = &brw->ctx;
 110    uint32_t dw1, dw2, dw3;
 111    float point_size;
 112    /* _NEW_BUFFERS */
 113    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
 114    const bool multisampled_fbo = _mesa_geometric_samples(ctx->DrawBuffer) > 1;
 115
 116    dw1 = GEN6_SF_STATISTICS_ENABLE;
 117
 118    if (brw->sf.viewport_transform_enable)
 119        dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 120
 121    /* _NEW_BUFFERS */
 122    dw1 |= (brw_depthbuffer_format(brw) << GEN7_SF_DEPTH_BUFFER_SURFACE_FORMAT_SHIFT);
 123
 124    /* _NEW_POLYGON */
 125    if (ctx->Polygon._FrontBit == render_to_fbo)
 126       dw1 |= GEN6_SF_WINDING_CCW;
 127
 128    if (ctx->Polygon.OffsetFill)
 129        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 130
 131    if (ctx->Polygon.OffsetLine)
 132        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 133
 134    if (ctx->Polygon.OffsetPoint)
 135        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 136
 137    switch (ctx->Polygon.FrontMode) {
 138    case GL_FILL:
 139        dw1 |= GEN6_SF_FRONT_SOLID;
 140        break;
 141
 142    case GL_LINE:
 143        dw1 |= GEN6_SF_FRONT_WIREFRAME;
 144        break;
 145
 146    case GL_POINT:
 147        dw1 |= GEN6_SF_FRONT_POINT;
 148        break;
 149
 150    default:
 151        unreachable("not reached");
 152    }
 153
 154    switch (ctx->Polygon.BackMode) {
 155    case GL_FILL:
 156        dw1 |= GEN6_SF_BACK_SOLID;
 157        break;
 158
 159    case GL_LINE:
 160        dw1 |= GEN6_SF_BACK_WIREFRAME;
 161        break;
 162
 163    case GL_POINT:
 164        dw1 |= GEN6_SF_BACK_POINT;
 165        break;
 166
 167    default:
 168        unreachable("not reached");
 169    }
 170
 171    dw2 = 0;
 172
 173    if (ctx->Polygon.CullFlag) {
 174       switch (ctx->Polygon.CullFaceMode) {
 175       case GL_FRONT:
 176          dw2 |= GEN6_SF_CULL_FRONT;
 177          break;
 178       case GL_BACK:
 179          dw2 |= GEN6_SF_CULL_BACK;
 180          break;
 181       case GL_FRONT_AND_BACK:
 182          dw2 |= GEN6_SF_CULL_BOTH;
 183          break;
 184       default:
 185          unreachable("not reached");
 186       }
 187    } else {
 188       dw2 |= GEN6_SF_CULL_NONE;
 189    }
 190
 191    /* _NEW_SCISSOR */
 192    if (ctx->Scissor.EnableFlags)
 193       dw2 |= GEN6_SF_SCISSOR_ENABLE;
 194
 195    /* _NEW_LINE */
 196    {
 197       uint32_t line_width_u3_7 = brw_get_line_width(brw);
 198       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 199    }
 200    if (ctx->Line.SmoothFlag) {
 201       dw2 |= GEN6_SF_LINE_AA_ENABLE;
 202       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 203    }
 204    if (ctx->Line.StippleFlag && brw->is_haswell) {
 205       dw2 |= HSW_SF_LINE_STIPPLE_ENABLE;
 206    }
 207    /* _NEW_MULTISAMPLE */
 208    if (multisampled_fbo && ctx->Multisample.Enabled)
 209       dw2 |= GEN6_SF_MSRAST_ON_PATTERN;
 210
 211    /* FINISHME: Last Pixel Enable?  Vertex Sub Pixel Precision Select?
 212     */
 213
 214    dw3 = GEN6_SF_LINE_AA_MODE_TRUE;
 215
 216    /* _NEW_PROGRAM | _NEW_POINT */
 217    if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
 218       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 219
 220    /* Clamp to ARB_point_parameters user limits */
 221    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 222
 223    /* Clamp to the hardware limits and convert to fixed point */
 224    dw3 |= U_FIXED(CLAMP(point_size, 0.125f, 255.875f), 3);
 225
 226    /* _NEW_LIGHT */
 227    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 228       dw3 |=
 229          (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 230          (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 231          (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 232    } else {
 233       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 234    }
 235
 236    BEGIN_BATCH(7);
 237    OUT_BATCH(_3DSTATE_SF << 16 | (7 - 2));
 238    OUT_BATCH(dw1);
 239    OUT_BATCH(dw2);
 240    OUT_BATCH(dw3);
 241    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 242    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 243    OUT_BATCH_F(ctx->Polygon.OffsetClamp); /* global depth offset clamp */
 244    ADVANCE_BATCH();
 245 }
 246
 247 const struct brw_tracked_state gen7_sf_state = {
 248    .dirty = {
 249       .mesa  = _NEW_BUFFERS |
 250                _NEW_LIGHT |
 251                _NEW_LINE |
 252                _NEW_MULTISAMPLE |
 253                _NEW_POINT |
 254                _NEW_POLYGON |
 255                _NEW_PROGRAM |
 256                _NEW_SCISSOR,
 257       .brw   = BRW_NEW_CONTEXT,
 258    },
 259    .emit = upload_sf_state,
 260 };