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 | _NEW_POINT | _NEW_LIGHT | _NEW_PROGRAM |
  64     * 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_VUE_MAP_GEOM_OUT),
  97       .cache = CACHE_NEW_WM_PROG
  98    },
  99    .emit = upload_sbe_state,
 100 };
 101
 102 static void
 103 upload_sf_state(struct brw_context *brw)
 104 {
 105    struct gl_context *ctx = &brw->ctx;
 106    uint32_t dw1, dw2, dw3;
 107    float point_size;
 108    /* _NEW_BUFFERS */
 109    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
 110    bool multisampled_fbo = ctx->DrawBuffer->Visual.samples > 1;
 111
 112    dw1 = GEN6_SF_STATISTICS_ENABLE |
 113          GEN6_SF_VIEWPORT_TRANSFORM_ENABLE;
 114
 115    /* _NEW_BUFFERS */
 116    dw1 |= (brw_depthbuffer_format(brw) << GEN7_SF_DEPTH_BUFFER_SURFACE_FORMAT_SHIFT);
 117
 118    /* _NEW_POLYGON */
 119    if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo)
 120       dw1 |= GEN6_SF_WINDING_CCW;
 121
 122    if (ctx->Polygon.OffsetFill)
 123        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_SOLID;
 124
 125    if (ctx->Polygon.OffsetLine)
 126        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_WIREFRAME;
 127
 128    if (ctx->Polygon.OffsetPoint)
 129        dw1 |= GEN6_SF_GLOBAL_DEPTH_OFFSET_POINT;
 130
 131    switch (ctx->Polygon.FrontMode) {
 132    case GL_FILL:
 133        dw1 |= GEN6_SF_FRONT_SOLID;
 134        break;
 135
 136    case GL_LINE:
 137        dw1 |= GEN6_SF_FRONT_WIREFRAME;
 138        break;
 139
 140    case GL_POINT:
 141        dw1 |= GEN6_SF_FRONT_POINT;
 142        break;
 143
 144    default:
 145        unreachable("not reached");
 146    }
 147
 148    switch (ctx->Polygon.BackMode) {
 149    case GL_FILL:
 150        dw1 |= GEN6_SF_BACK_SOLID;
 151        break;
 152
 153    case GL_LINE:
 154        dw1 |= GEN6_SF_BACK_WIREFRAME;
 155        break;
 156
 157    case GL_POINT:
 158        dw1 |= GEN6_SF_BACK_POINT;
 159        break;
 160
 161    default:
 162        unreachable("not reached");
 163    }
 164
 165    dw2 = 0;
 166
 167    if (ctx->Polygon.CullFlag) {
 168       switch (ctx->Polygon.CullFaceMode) {
 169       case GL_FRONT:
 170          dw2 |= GEN6_SF_CULL_FRONT;
 171          break;
 172       case GL_BACK:
 173          dw2 |= GEN6_SF_CULL_BACK;
 174          break;
 175       case GL_FRONT_AND_BACK:
 176          dw2 |= GEN6_SF_CULL_BOTH;
 177          break;
 178       default:
 179          unreachable("not reached");
 180       }
 181    } else {
 182       dw2 |= GEN6_SF_CULL_NONE;
 183    }
 184
 185    /* _NEW_SCISSOR */
 186    if (ctx->Scissor.EnableFlags)
 187       dw2 |= GEN6_SF_SCISSOR_ENABLE;
 188
 189    /* _NEW_LINE */
 190    {
 191       uint32_t line_width_u3_7 = U_FIXED(CLAMP(ctx->Line.Width, 0.0, 7.99), 7);
 192       /* TODO: line width of 0 is not allowed when MSAA enabled */
 193       if (line_width_u3_7 == 0)
 194          line_width_u3_7 = 1;
 195       dw2 |= line_width_u3_7 << GEN6_SF_LINE_WIDTH_SHIFT;
 196    }
 197    if (ctx->Line.SmoothFlag) {
 198       dw2 |= GEN6_SF_LINE_AA_ENABLE;
 199       dw2 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
 200    }
 201    if (ctx->Line.StippleFlag && brw->is_haswell) {
 202       dw2 |= HSW_SF_LINE_STIPPLE_ENABLE;
 203    }
 204    /* _NEW_MULTISAMPLE */
 205    if (multisampled_fbo && ctx->Multisample.Enabled)
 206       dw2 |= GEN6_SF_MSRAST_ON_PATTERN;
 207
 208    /* FINISHME: Last Pixel Enable?  Vertex Sub Pixel Precision Select?
 209     */
 210
 211    dw3 = GEN6_SF_LINE_AA_MODE_TRUE;
 212
 213    /* _NEW_PROGRAM | _NEW_POINT */
 214    if (!(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated))
 215       dw3 |= GEN6_SF_USE_STATE_POINT_WIDTH;
 216
 217    /* Clamp to ARB_point_parameters user limits */
 218    point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize);
 219
 220    /* Clamp to the hardware limits and convert to fixed point */
 221    dw3 |= U_FIXED(CLAMP(point_size, 0.125, 255.875), 3);
 222
 223    /* _NEW_LIGHT */
 224    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
 225       dw3 |=
 226          (2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
 227          (2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
 228          (1 << GEN6_SF_LINE_PROVOKE_SHIFT);
 229    } else {
 230       dw3 |= (1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
 231    }
 232
 233    BEGIN_BATCH(7);
 234    OUT_BATCH(_3DSTATE_SF << 16 | (7 - 2));
 235    OUT_BATCH(dw1);
 236    OUT_BATCH(dw2);
 237    OUT_BATCH(dw3);
 238    OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant.  copied from gen4 */
 239    OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
 240    OUT_BATCH_F(0.0); /* XXX: global depth offset clamp */
 241    ADVANCE_BATCH();
 242 }
 243
 244 const struct brw_tracked_state gen7_sf_state = {
 245    .dirty = {
 246       .mesa  = (_NEW_LIGHT |
 247                 _NEW_PROGRAM |
 248                 _NEW_POLYGON |
 249                 _NEW_LINE |
 250                 _NEW_SCISSOR |
 251                 _NEW_BUFFERS |
 252                 _NEW_POINT |
 253                 _NEW_MULTISAMPLE),
 254       .brw   = BRW_NEW_CONTEXT,
 255       .cache = CACHE_NEW_VS_PROG
 256    },
 257    .emit = upload_sf_state,
 258 };