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  1. /*
  2.  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
  3.  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
  4.  develop this 3D driver.
  5.  
  6.  Permission is hereby granted, free of charge, to any person obtaining
  7.  a copy of this software and associated documentation files (the
  8.  "Software"), to deal in the Software without restriction, including
  9.  without limitation the rights to use, copy, modify, merge, publish,
  10.  distribute, sublicense, and/or sell copies of the Software, and to
  11.  permit persons to whom the Software is furnished to do so, subject to
  12.  the following conditions:
  13.  
  14.  The above copyright notice and this permission notice (including the
  15.  next paragraph) shall be included in all copies or substantial
  16.  portions of the Software.
  17.  
  18.  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19.  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21.  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22.  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23.  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24.  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  
  26.  **********************************************************************/
  27.  /*
  28.   * Authors:
  29.   *   Keith Whitwell <keith@tungstengraphics.com>
  30.   */
  31.    
  32.  
  33.  
  34. #include "main/mtypes.h"
  35. #include "main/macros.h"
  36. #include "main/fbobject.h"
  37. #include "brw_context.h"
  38. #include "brw_state.h"
  39. #include "brw_defines.h"
  40. #include "brw_sf.h"
  41.  
  42. static void upload_sf_vp(struct brw_context *brw)
  43. {
  44.    struct gl_context *ctx = &brw->ctx;
  45.    const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
  46.    struct brw_sf_viewport *sfv;
  47.    GLfloat y_scale, y_bias;
  48.    const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  49.    const GLfloat *v = ctx->Viewport._WindowMap.m;
  50.  
  51.    sfv = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
  52.                          sizeof(*sfv), 32, &brw->sf.vp_offset);
  53.    memset(sfv, 0, sizeof(*sfv));
  54.  
  55.    if (render_to_fbo) {
  56.       y_scale = 1.0;
  57.       y_bias = 0;
  58.    }
  59.    else {
  60.       y_scale = -1.0;
  61.       y_bias = ctx->DrawBuffer->Height;
  62.    }
  63.  
  64.    /* _NEW_VIEWPORT */
  65.  
  66.    sfv->viewport.m00 = v[MAT_SX];
  67.    sfv->viewport.m11 = v[MAT_SY] * y_scale;
  68.    sfv->viewport.m22 = v[MAT_SZ] * depth_scale;
  69.    sfv->viewport.m30 = v[MAT_TX];
  70.    sfv->viewport.m31 = v[MAT_TY] * y_scale + y_bias;
  71.    sfv->viewport.m32 = v[MAT_TZ] * depth_scale;
  72.  
  73.    /* _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT
  74.     * for DrawBuffer->_[XY]{min,max}
  75.     */
  76.  
  77.    /* The scissor only needs to handle the intersection of drawable
  78.     * and scissor rect, since there are no longer cliprects for shared
  79.     * buffers with DRI2.
  80.     *
  81.     * Note that the hardware's coordinates are inclusive, while Mesa's min is
  82.     * inclusive but max is exclusive.
  83.     */
  84.  
  85.    if (ctx->DrawBuffer->_Xmin == ctx->DrawBuffer->_Xmax ||
  86.        ctx->DrawBuffer->_Ymin == ctx->DrawBuffer->_Ymax) {
  87.       /* If the scissor was out of bounds and got clamped to 0
  88.        * width/height at the bounds, the subtraction of 1 from
  89.        * maximums could produce a negative number and thus not clip
  90.        * anything.  Instead, just provide a min > max scissor inside
  91.        * the bounds, which produces the expected no rendering.
  92.        */
  93.       sfv->scissor.xmin = 1;
  94.       sfv->scissor.xmax = 0;
  95.       sfv->scissor.ymin = 1;
  96.       sfv->scissor.ymax = 0;
  97.    } else if (render_to_fbo) {
  98.       /* texmemory: Y=0=bottom */
  99.       sfv->scissor.xmin = ctx->DrawBuffer->_Xmin;
  100.       sfv->scissor.xmax = ctx->DrawBuffer->_Xmax - 1;
  101.       sfv->scissor.ymin = ctx->DrawBuffer->_Ymin;
  102.       sfv->scissor.ymax = ctx->DrawBuffer->_Ymax - 1;
  103.    }
  104.    else {
  105.       /* memory: Y=0=top */
  106.       sfv->scissor.xmin = ctx->DrawBuffer->_Xmin;
  107.       sfv->scissor.xmax = ctx->DrawBuffer->_Xmax - 1;
  108.       sfv->scissor.ymin = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymax;
  109.       sfv->scissor.ymax = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymin - 1;
  110.    }
  111.  
  112.    brw->state.dirty.cache |= CACHE_NEW_SF_VP;
  113. }
  114.  
  115. const struct brw_tracked_state brw_sf_vp = {
  116.    .dirty = {
  117.       .mesa  = (_NEW_VIEWPORT |
  118.                 _NEW_SCISSOR |
  119.                 _NEW_BUFFERS),
  120.       .brw   = BRW_NEW_BATCH,
  121.       .cache = 0
  122.    },
  123.    .emit = upload_sf_vp
  124. };
  125.  
  126. static void upload_sf_unit( struct brw_context *brw )
  127. {
  128.    struct gl_context *ctx = &brw->ctx;
  129.    struct brw_sf_unit_state *sf;
  130.    drm_intel_bo *bo = brw->batch.bo;
  131.    int chipset_max_threads;
  132.    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  133.  
  134.    sf = brw_state_batch(brw, AUB_TRACE_SF_STATE,
  135.                         sizeof(*sf), 64, &brw->sf.state_offset);
  136.  
  137.    memset(sf, 0, sizeof(*sf));
  138.  
  139.    /* BRW_NEW_PROGRAM_CACHE | CACHE_NEW_SF_PROG */
  140.    sf->thread0.grf_reg_count = ALIGN(brw->sf.prog_data->total_grf, 16) / 16 - 1;
  141.    sf->thread0.kernel_start_pointer =
  142.       brw_program_reloc(brw,
  143.                         brw->sf.state_offset +
  144.                         offsetof(struct brw_sf_unit_state, thread0),
  145.                         brw->sf.prog_offset +
  146.                         (sf->thread0.grf_reg_count << 1)) >> 6;
  147.  
  148.    sf->thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
  149.  
  150.    sf->thread3.dispatch_grf_start_reg = 3;
  151.    sf->thread3.urb_entry_read_offset = BRW_SF_URB_ENTRY_READ_OFFSET;
  152.  
  153.    /* CACHE_NEW_SF_PROG */
  154.    sf->thread3.urb_entry_read_length = brw->sf.prog_data->urb_read_length;
  155.  
  156.    /* BRW_NEW_URB_FENCE */
  157.    sf->thread4.nr_urb_entries = brw->urb.nr_sf_entries;
  158.    sf->thread4.urb_entry_allocation_size = brw->urb.sfsize - 1;
  159.  
  160.    /* Each SF thread produces 1 PUE, and there can be up to 24 (Pre-Ironlake) or
  161.     * 48 (Ironlake) threads.
  162.     */
  163.    if (brw->gen == 5)
  164.       chipset_max_threads = 48;
  165.    else
  166.       chipset_max_threads = 24;
  167.  
  168.    /* BRW_NEW_URB_FENCE */
  169.    sf->thread4.max_threads = MIN2(chipset_max_threads,
  170.                                   brw->urb.nr_sf_entries) - 1;
  171.  
  172.    if (unlikely(INTEL_DEBUG & DEBUG_STATS))
  173.       sf->thread4.stats_enable = 1;
  174.  
  175.    /* CACHE_NEW_SF_VP */
  176.    sf->sf5.sf_viewport_state_offset = (brw->batch.bo->offset +
  177.                                        brw->sf.vp_offset) >> 5; /* reloc */
  178.  
  179.    sf->sf5.viewport_transform = 1;
  180.  
  181.    /* _NEW_SCISSOR */
  182.    if (ctx->Scissor.Enabled)
  183.       sf->sf6.scissor = 1;
  184.  
  185.    /* _NEW_POLYGON */
  186.    if (ctx->Polygon.FrontFace == GL_CCW)
  187.       sf->sf5.front_winding = BRW_FRONTWINDING_CCW;
  188.    else
  189.       sf->sf5.front_winding = BRW_FRONTWINDING_CW;
  190.  
  191.    /* _NEW_BUFFERS
  192.     * The viewport is inverted for rendering to a FBO, and that inverts
  193.     * polygon front/back orientation.
  194.     */
  195.    sf->sf5.front_winding ^= render_to_fbo;
  196.  
  197.    /* _NEW_POLYGON */
  198.    switch (ctx->Polygon.CullFlag ? ctx->Polygon.CullFaceMode : GL_NONE) {
  199.    case GL_FRONT:
  200.       sf->sf6.cull_mode = BRW_CULLMODE_FRONT;
  201.       break;
  202.    case GL_BACK:
  203.       sf->sf6.cull_mode = BRW_CULLMODE_BACK;
  204.       break;
  205.    case GL_FRONT_AND_BACK:
  206.       sf->sf6.cull_mode = BRW_CULLMODE_BOTH;
  207.       break;
  208.    case GL_NONE:
  209.       sf->sf6.cull_mode = BRW_CULLMODE_NONE;
  210.       break;
  211.    default:
  212.       assert(0);
  213.       break;
  214.    }
  215.  
  216.    /* _NEW_LINE */
  217.    /* XXX use ctx->Const.Min/MaxLineWidth here */
  218.    sf->sf6.line_width = CLAMP(ctx->Line.Width, 1.0, 5.0) * (1<<1);
  219.  
  220.    sf->sf6.line_endcap_aa_region_width = 1;
  221.    if (ctx->Line.SmoothFlag)
  222.       sf->sf6.aa_enable = 1;
  223.    else if (sf->sf6.line_width <= 0x2)
  224.        sf->sf6.line_width = 0;
  225.  
  226.    /* _NEW_BUFFERS */
  227.    if (!render_to_fbo) {
  228.       /* Rendering to an OpenGL window */
  229.       sf->sf6.point_rast_rule = BRW_RASTRULE_UPPER_RIGHT;
  230.    }
  231.    else {
  232.       /* If rendering to an FBO, the pixel coordinate system is
  233.        * inverted with respect to the normal OpenGL coordinate
  234.        * system, so BRW_RASTRULE_LOWER_RIGHT is correct.
  235.        * But this value is listed as "Reserved, but not seen as useful"
  236.        * in Intel documentation (page 212, "Point Rasterization Rule",
  237.        * section 7.4 "SF Pipeline State Summary", of document
  238.        * "Intel® 965 Express Chipset Family and Intel® G35 Express
  239.        * Chipset Graphics Controller Programmer's Reference Manual,
  240.        * Volume 2: 3D/Media", Revision 1.0b as of January 2008,
  241.        * available at
  242.        *     http://intellinuxgraphics.org/documentation.html
  243.        * at the time of this writing).
  244.        *
  245.        * It does work on at least some devices, if not all;
  246.        * if devices that don't support it can be identified,
  247.        * the likely failure case is that points are rasterized
  248.        * incorrectly, which is no worse than occurs without
  249.        * the value, so we're using it here.
  250.        */
  251.       sf->sf6.point_rast_rule = BRW_RASTRULE_LOWER_RIGHT;
  252.    }
  253.    /* XXX clamp max depends on AA vs. non-AA */
  254.  
  255.    /* _NEW_POINT */
  256.    sf->sf7.sprite_point = ctx->Point.PointSprite;
  257.    sf->sf7.point_size = CLAMP(rint(CLAMP(ctx->Point.Size,
  258.                                          ctx->Point.MinSize,
  259.                                          ctx->Point.MaxSize)), 1, 255) * (1<<3);
  260.    /* _NEW_PROGRAM | _NEW_POINT */
  261.    sf->sf7.use_point_size_state = !(ctx->VertexProgram.PointSizeEnabled ||
  262.                                     ctx->Point._Attenuated);
  263.    sf->sf7.aa_line_distance_mode = 0;
  264.  
  265.    /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons:
  266.     * _NEW_LIGHT
  267.     */
  268.    if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
  269.       sf->sf7.trifan_pv = 2;
  270.       sf->sf7.linestrip_pv = 1;
  271.       sf->sf7.tristrip_pv = 2;
  272.    } else {
  273.       sf->sf7.trifan_pv = 1;
  274.       sf->sf7.linestrip_pv = 0;
  275.       sf->sf7.tristrip_pv = 0;
  276.    }
  277.    sf->sf7.line_last_pixel_enable = 0;
  278.  
  279.    /* Set bias for OpenGL rasterization rules:
  280.     */
  281.    sf->sf6.dest_org_vbias = 0x8;
  282.    sf->sf6.dest_org_hbias = 0x8;
  283.  
  284.    /* STATE_PREFETCH command description describes this state as being
  285.     * something loaded through the GPE (L2 ISC), so it's INSTRUCTION domain.
  286.     */
  287.  
  288.    /* Emit SF viewport relocation */
  289.    drm_intel_bo_emit_reloc(bo, (brw->sf.state_offset +
  290.                                 offsetof(struct brw_sf_unit_state, sf5)),
  291.                            brw->batch.bo, (brw->sf.vp_offset |
  292.                                              sf->sf5.front_winding |
  293.                                              (sf->sf5.viewport_transform << 1)),
  294.                            I915_GEM_DOMAIN_INSTRUCTION, 0);
  295.  
  296.    brw->state.dirty.cache |= CACHE_NEW_SF_UNIT;
  297. }
  298.  
  299. const struct brw_tracked_state brw_sf_unit = {
  300.    .dirty = {
  301.       .mesa  = (_NEW_POLYGON |
  302.                 _NEW_PROGRAM |
  303.                 _NEW_LIGHT |
  304.                 _NEW_LINE |
  305.                 _NEW_POINT |
  306.                 _NEW_SCISSOR |
  307.                 _NEW_BUFFERS),
  308.       .brw   = (BRW_NEW_BATCH |
  309.                 BRW_NEW_PROGRAM_CACHE |
  310.                 BRW_NEW_URB_FENCE),
  311.       .cache = (CACHE_NEW_SF_VP |
  312.                 CACHE_NEW_SF_PROG)
  313.    },
  314.    .emit = upload_sf_unit,
  315. };
  316.