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    const int urb_entry_read_offset = BRW_SF_URB_ENTRY_READ_OFFSET;
  44    uint16_t attr_overrides[16];
  45    /* _NEW_BUFFERS */
  46    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  47    uint32_t point_sprite_origin;
  48
  49    /* FINISHME: Attribute Swizzle Control Mode? */
  50    dw1 = GEN7_SBE_SWIZZLE_ENABLE | num_outputs << GEN7_SBE_NUM_OUTPUTS_SHIFT;
  51
  52    /* _NEW_POINT
  53     *
  54     * Window coordinates in an FBO are inverted, which means point
  55     * sprite origin must be inverted.
  56     */
  57    if ((ctx->Point.SpriteOrigin == GL_LOWER_LEFT) != render_to_fbo) {
  58       point_sprite_origin = GEN6_SF_POINT_SPRITE_LOWERLEFT;
  59    } else {
  60       point_sprite_origin = GEN6_SF_POINT_SPRITE_UPPERLEFT;
  61    }
  62    dw1 |= point_sprite_origin;
  63
  64    /* BRW_NEW_VUE_MAP_GEOM_OUT | BRW_NEW_FRAGMENT_PROGRAM
  65     * _NEW_POINT | _NEW_LIGHT | _NEW_PROGRAM | BRW_NEW_FS_PROG_DATA
  66     */
  67    uint32_t urb_entry_read_length;
  68    calculate_attr_overrides(brw, attr_overrides, &point_sprite_enables,
  69                             &flat_enables, &urb_entry_read_length);
  70    dw1 |= urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
  71           urb_entry_read_offset << GEN7_SBE_URB_ENTRY_READ_OFFSET_SHIFT;
  72
  73    BEGIN_BATCH(14);
  74    OUT_BATCH(_3DSTATE_SBE << 16 | (14 - 2));
  75    OUT_BATCH(dw1);
  76
  77    /* Output dwords 2 through 9 */
  78    for (i = 0; i < 8; i++) {
  79       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
  80    }
  81
  82    OUT_BATCH(point_sprite_enables); /* dw10 */
  83    OUT_BATCH(flat_enables);
  84    OUT_BATCH(0); /* wrapshortest enables 0-7 */
  85    OUT_BATCH(0); /* wrapshortest enables 8-15 */
  86    ADVANCE_BATCH();
  87 }
  88
  89 const struct brw_tracked_state gen7_sbe_state = {
  90    .dirty = {
  91       .mesa  = _NEW_BUFFERS |
  92                _NEW_LIGHT |
  93                _NEW_POINT |
  94                _NEW_PROGRAM,
  95       .brw   = BRW_NEW_CONTEXT |
  96                BRW_NEW_FRAGMENT_PROGRAM |
  97                BRW_NEW_FS_PROG_DATA |
  98                BRW_NEW_GEOMETRY_PROGRAM |
  99                BRW_NEW_PRIMITIVE |
 100                BRW_NEW_VUE_MAP_GEOM_OUT,
 101    },
 102    .emit = upload_sbe_state,
 103 };
 104
 105 static void
 106 upload_sf_state(struct brw_context *brw)
 107 {
 108    struct gl_context *ctx = &brw->ctx;
 109    uint32_t dw1, dw2, dw3;
 110    float point_size;
 111    /* _NEW_BUFFERS */
 112    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
 113    const bool multisampled_fbo = _mesa_geometric_samples(ctx->DrawBuffer) > 1;
 114
 115    dw1 = GEN6_SF_STATISTICS_ENABLE;
 116
 117    if (brw->sf.viewport_transform_enable)
 118        dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 119
 120    /* _NEW_BUFFERS */
 121    dw1 |= (brw_depthbuffer_format(brw) << GEN7_SF_DEPTH_BUFFER_SURFACE_FORMAT_SHIFT);
 122
 123    /* _NEW_POLYGON */
 124    if (ctx->Polygon._FrontBit == render_to_fbo)
 125       dw1 |= GEN6_SF_WINDING_CCW;
 126
 127    if (ctx->Polygon.OffsetFill)
 128        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 129
 130    if (ctx->Polygon.OffsetLine)
 131        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 132
 133    if (ctx->Polygon.OffsetPoint)
 134        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 135
 136    switch (ctx->Polygon.FrontMode) {
 137    case GL_FILL:
 138        dw1 |= GEN6_SF_FRONT_SOLID;
 139        break;
 140
 141    case GL_LINE:
 142        dw1 |= GEN6_SF_FRONT_WIREFRAME;
 143        break;
 144
 145    case GL_POINT:
 146        dw1 |= GEN6_SF_FRONT_POINT;
 147        break;
 148
 149    default:
 150        unreachable("not reached");
 151    }
 152
 153    switch (ctx->Polygon.BackMode) {
 154    case GL_FILL:
 155        dw1 |= GEN6_SF_BACK_SOLID;
 156        break;
 157
 158    case GL_LINE:
 159        dw1 |= GEN6_SF_BACK_WIREFRAME;
 160        break;
 161
 162    case GL_POINT:
 163        dw1 |= GEN6_SF_BACK_POINT;
 164        break;
 165
 166    default:
 167        unreachable("not reached");
 168    }
 169
 170    dw2 = 0;
 171
 172    if (ctx->Polygon.CullFlag) {
 173       switch (ctx->Polygon.CullFaceMode) {
 174       case GL_FRONT:
 175          dw2 |= GEN6_SF_CULL_FRONT;
 176          break;
 177       case GL_BACK:
 178          dw2 |= GEN6_SF_CULL_BACK;
 179          break;
 180       case GL_FRONT_AND_BACK:
 181          dw2 |= GEN6_SF_CULL_BOTH;
 182          break;
 183       default:
 184          unreachable("not reached");
 185       }
 186    } else {
 187       dw2 |= GEN6_SF_CULL_NONE;
 188    }
 189
 190    /* _NEW_SCISSOR */
 191    if (ctx->Scissor.EnableFlags)
 192       dw2 |= GEN6_SF_SCISSOR_ENABLE;
 193
 194    /* _NEW_LINE */
 195    {
 196       uint32_t line_width_u3_7 = brw_get_line_width(brw);
 197       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 198    }
 199    if (ctx->Line.SmoothFlag) {
 200       dw2 |= GEN6_SF_LINE_AA_ENABLE;
 201       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 202    }
 203    if (ctx->Line.StippleFlag && brw->is_haswell) {
 204       dw2 |= HSW_SF_LINE_STIPPLE_ENABLE;
 205    }
 206    /* _NEW_MULTISAMPLE */
 207    if (multisampled_fbo && ctx->Multisample.Enabled)
 208       dw2 |= GEN6_SF_MSRAST_ON_PATTERN;
 209
 210    /* FINISHME: Last Pixel Enable?  Vertex Sub Pixel Precision Select?
 211     */
 212
 213    dw3 = GEN6_SF_LINE_AA_MODE_TRUE;
 214
 215    /* _NEW_PROGRAM | _NEW_POINT */
 216    if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
 217       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 218
 219    /* Clamp to ARB_point_parameters user limits */
 220    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 221
 222    /* Clamp to the hardware limits and convert to fixed point */
 223    dw3 |= U_FIXED(CLAMP(point_size, 0.125f, 255.875f), 3);
 224
 225    /* _NEW_LIGHT */
 226    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 227       dw3 |=
 228          (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 229          (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 230          (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 231    } else {
 232       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 233    }
 234
 235    BEGIN_BATCH(7);
 236    OUT_BATCH(_3DSTATE_SF << 16 | (7 - 2));
 237    OUT_BATCH(dw1);
 238    OUT_BATCH(dw2);
 239    OUT_BATCH(dw3);
 240    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 241    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 242    OUT_BATCH_F(ctx->Polygon.OffsetClamp); /* global depth offset clamp */
 243    ADVANCE_BATCH();
 244 }
 245
 246 const struct brw_tracked_state gen7_sf_state = {
 247    .dirty = {
 248       .mesa  = _NEW_BUFFERS |
 249                _NEW_LIGHT |
 250                _NEW_LINE |
 251                _NEW_MULTISAMPLE |
 252                _NEW_POINT |
 253                _NEW_POLYGON |
 254                _NEW_PROGRAM |
 255                _NEW_SCISSOR,
 256       .brw   = BRW_NEW_CONTEXT,
 257    },
 258    .emit = upload_sf_state,
 259 };