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 "intel_batchbuffer.h"
  31
  32 static void
  33 upload_sbe_state(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    uint32_t dw1;
  39    uint32_t point_sprite_enables;
  40    uint32_t flat_enables;
  41    int i;
  42    const int urb_entry_read_offset = BRW_SF_URB_ENTRY_READ_OFFSET;
  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 | CACHE_NEW_WM_PROG
  65     */
  66    uint32_t urb_entry_read_length;
  67    calculate_attr_overrides(brw, attr_overrides, &point_sprite_enables,
  68                             &flat_enables, &urb_entry_read_length);
  69    dw1 |= urb_entry_read_length << GEN7_SBE_URB_ENTRY_READ_LENGTH_SHIFT |
  70           urb_entry_read_offset << GEN7_SBE_URB_ENTRY_READ_OFFSET_SHIFT;
  71
  72    BEGIN_BATCH(14);
  73    OUT_BATCH(_3DSTATE_SBE << 16 | (14 - 2));
  74    OUT_BATCH(dw1);
  75
  76    /* Output dwords 2 through 9 */
  77    for (i = 0; i < 8; i++) {
  78       OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
  79    }
  80
  81    OUT_BATCH(point_sprite_enables); /* dw10 */
  82    OUT_BATCH(flat_enables);
  83    OUT_BATCH(0); /* wrapshortest enables 0-7 */
  84    OUT_BATCH(0); /* wrapshortest enables 8-15 */
  85    ADVANCE_BATCH();
  86 }
  87
  88 const struct brw_tracked_state gen7_sbe_state = {
  89    .dirty = {
  90       .mesa  = _NEW_BUFFERS |
  91                _NEW_LIGHT |
  92                _NEW_POINT |
  93                _NEW_PROGRAM,
  94       .brw   = BRW_NEW_CONTEXT |
  95                BRW_NEW_FRAGMENT_PROGRAM |
  96                BRW_NEW_GEOMETRY_PROGRAM |
  97                BRW_NEW_PRIMITIVE |
  98                BRW_NEW_VUE_MAP_GEOM_OUT,
  99       .cache = CACHE_NEW_WM_PROG
 100    },
 101    .emit = upload_sbe_state,
 102 };
 103
 104 static void
 105 upload_sf_state(struct brw_context *brw)
 106 {
 107    struct gl_context *ctx = &brw->ctx;
 108    uint32_t dw1, dw2, dw3;
 109    float point_size;
 110    /* _NEW_BUFFERS */
 111    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
 112    bool multisampled_fbo = ctx->DrawBuffer->Visual.samples > 1;
 113
 114    dw1 = GEN6_SF_STATISTICS_ENABLE;
 115
 116    if (brw->sf.viewport_transform_enable)
 117        dw1 |= GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 118
 119    /* _NEW_BUFFERS */
 120    dw1 |= (brw_depthbuffer_format(brw) << GEN7_SF_DEPTH_BUFFER_SURFACE_FORMAT_SHIFT);
 121
 122    /* _NEW_POLYGON */
 123    if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo)
 124       dw1 |= GEN6_SF_WINDING_CCW;
 125
 126    if (ctx->Polygon.OffsetFill)
 127        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 128
 129    if (ctx->Polygon.OffsetLine)
 130        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 131
 132    if (ctx->Polygon.OffsetPoint)
 133        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 134
 135    switch (ctx->Polygon.FrontMode) {
 136    case GL_FILL:
 137        dw1 |= GEN6_SF_FRONT_SOLID;
 138        break;
 139
 140    case GL_LINE:
 141        dw1 |= GEN6_SF_FRONT_WIREFRAME;
 142        break;
 143
 144    case GL_POINT:
 145        dw1 |= GEN6_SF_FRONT_POINT;
 146        break;
 147
 148    default:
 149        unreachable("not reached");
 150    }
 151
 152    switch (ctx->Polygon.BackMode) {
 153    case GL_FILL:
 154        dw1 |= GEN6_SF_BACK_SOLID;
 155        break;
 156
 157    case GL_LINE:
 158        dw1 |= GEN6_SF_BACK_WIREFRAME;
 159        break;
 160
 161    case GL_POINT:
 162        dw1 |= GEN6_SF_BACK_POINT;
 163        break;
 164
 165    default:
 166        unreachable("not reached");
 167    }
 168
 169    dw2 = 0;
 170
 171    if (ctx->Polygon.CullFlag) {
 172       switch (ctx->Polygon.CullFaceMode) {
 173       case GL_FRONT:
 174          dw2 |= GEN6_SF_CULL_FRONT;
 175          break;
 176       case GL_BACK:
 177          dw2 |= GEN6_SF_CULL_BACK;
 178          break;
 179       case GL_FRONT_AND_BACK:
 180          dw2 |= GEN6_SF_CULL_BOTH;
 181          break;
 182       default:
 183          unreachable("not reached");
 184       }
 185    } else {
 186       dw2 |= GEN6_SF_CULL_NONE;
 187    }
 188
 189    /* _NEW_SCISSOR */
 190    if (ctx->Scissor.EnableFlags)
 191       dw2 |= GEN6_SF_SCISSOR_ENABLE;
 192
 193    /* _NEW_LINE */
 194    {
 195       uint32_t line_width_u3_7 =
 196          U_FIXED(CLAMP(ctx->Line.Width, 0.0, ctx->Const.MaxLineWidth), 7);
 197       /* TODO: line width of 0 is not allowed when MSAA enabled */
 198       if (line_width_u3_7 == 0)
 199          line_width_u3_7 = 1;
 200       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 201    }
 202    if (ctx->Line.SmoothFlag) {
 203       dw2 |= GEN6_SF_LINE_AA_ENABLE;
 204       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 205    }
 206    if (ctx->Line.StippleFlag && brw->is_haswell) {
 207       dw2 |= HSW_SF_LINE_STIPPLE_ENABLE;
 208    }
 209    /* _NEW_MULTISAMPLE */
 210    if (multisampled_fbo && ctx->Multisample.Enabled)
 211       dw2 |= GEN6_SF_MSRAST_ON_PATTERN;
 212
 213    /* FINISHME: Last Pixel Enable?  Vertex Sub Pixel Precision Select?
 214     */
 215
 216    dw3 = GEN6_SF_LINE_AA_MODE_TRUE;
 217
 218    /* _NEW_PROGRAM | _NEW_POINT */
 219    if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
 220       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 221
 222    /* Clamp to ARB_point_parameters user limits */
 223    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 224
 225    /* Clamp to the hardware limits and convert to fixed point */
 226    dw3 |= U_FIXED(CLAMP(point_size, 0.125, 255.875), 3);
 227
 228    /* _NEW_LIGHT */
 229    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 230       dw3 |=
 231          (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 232          (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 233          (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 234    } else {
 235       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 236    }
 237
 238    BEGIN_BATCH(7);
 239    OUT_BATCH(_3DSTATE_SF << 16 | (7 - 2));
 240    OUT_BATCH(dw1);
 241    OUT_BATCH(dw2);
 242    OUT_BATCH(dw3);
 243    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 244    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 245    OUT_BATCH_F(0.0); /* XXX: global depth offset clamp */
 246    ADVANCE_BATCH();
 247 }
 248
 249 const struct brw_tracked_state gen7_sf_state = {
 250    .dirty = {
 251       .mesa  = _NEW_BUFFERS |
 252                _NEW_LIGHT |
 253                _NEW_LINE |
 254                _NEW_MULTISAMPLE |
 255                _NEW_POINT |
 256                _NEW_POLYGON |
 257                _NEW_PROGRAM |
 258                _NEW_SCISSOR,
 259       .brw   = BRW_NEW_CONTEXT,
 260       .cache = 0,
 261    },
 262    .emit = upload_sf_state,
 263 };