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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. #include "main/glheader.h"
  34. #include "main/macros.h"
  35. #include "main/mtypes.h"
  36. #include "main/enums.h"
  37. #include "main/fbobject.h"
  38.  
  39. #include "intel_batchbuffer.h"
  40.  
  41. #include "brw_defines.h"
  42. #include "brw_context.h"
  43. #include "brw_eu.h"
  44. #include "brw_util.h"
  45. #include "brw_sf.h"
  46. #include "brw_state.h"
  47.  
  48. #include "glsl/ralloc.h"
  49.  
  50. static void compile_sf_prog( struct brw_context *brw,
  51.                              struct brw_sf_prog_key *key )
  52. {
  53.    struct brw_sf_compile c;
  54.    const GLuint *program;
  55.    void *mem_ctx;
  56.    GLuint program_size;
  57.    GLuint i;
  58.  
  59.    memset(&c, 0, sizeof(c));
  60.  
  61.    mem_ctx = ralloc_context(NULL);
  62.    /* Begin the compilation:
  63.     */
  64.    brw_init_compile(brw, &c.func, mem_ctx);
  65.  
  66.    c.key = *key;
  67.    c.vue_map = brw->vue_map_geom_out;
  68.    if (c.key.do_point_coord) {
  69.       /*
  70.        * gl_PointCoord is a FS instead of VS builtin variable, thus it's
  71.        * not included in c.vue_map generated in VS stage. Here we add
  72.        * it manually to let SF shader generate the needed interpolation
  73.        * coefficient for FS shader.
  74.        */
  75.       c.vue_map.varying_to_slot[BRW_VARYING_SLOT_PNTC] = c.vue_map.num_slots;
  76.       c.vue_map.slot_to_varying[c.vue_map.num_slots++] = BRW_VARYING_SLOT_PNTC;
  77.    }
  78.    c.urb_entry_read_offset = BRW_SF_URB_ENTRY_READ_OFFSET;
  79.    c.nr_attr_regs = (c.vue_map.num_slots + 1)/2 - c.urb_entry_read_offset;
  80.    c.nr_setup_regs = c.nr_attr_regs;
  81.  
  82.    c.prog_data.urb_read_length = c.nr_attr_regs;
  83.    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  84.  
  85.    /* Which primitive?  Or all three?
  86.     */
  87.    switch (key->primitive) {
  88.    case SF_TRIANGLES:
  89.       c.nr_verts = 3;
  90.       brw_emit_tri_setup( &c, true );
  91.       break;
  92.    case SF_LINES:
  93.       c.nr_verts = 2;
  94.       brw_emit_line_setup( &c, true );
  95.       break;
  96.    case SF_POINTS:
  97.       c.nr_verts = 1;
  98.       if (key->do_point_sprite)
  99.           brw_emit_point_sprite_setup( &c, true );
  100.       else
  101.           brw_emit_point_setup( &c, true );
  102.       break;
  103.    case SF_UNFILLED_TRIS:
  104.       c.nr_verts = 3;
  105.       brw_emit_anyprim_setup( &c );
  106.       break;
  107.    default:
  108.       assert(0);
  109.       return;
  110.    }
  111.  
  112.    /* get the program
  113.     */
  114.    program = brw_get_program(&c.func, &program_size);
  115.  
  116.    if (unlikely(INTEL_DEBUG & DEBUG_SF)) {
  117.       printf("sf:\n");
  118.       for (i = 0; i < program_size / sizeof(struct brw_instruction); i++)
  119.          brw_disasm(stdout, &((struct brw_instruction *)program)[i],
  120.                     brw->gen);
  121.       printf("\n");
  122.    }
  123.  
  124.    brw_upload_cache(&brw->cache, BRW_SF_PROG,
  125.                     &c.key, sizeof(c.key),
  126.                     program, program_size,
  127.                     &c.prog_data, sizeof(c.prog_data),
  128.                     &brw->sf.prog_offset, &brw->sf.prog_data);
  129.    ralloc_free(mem_ctx);
  130. }
  131.  
  132. /* Calculate interpolants for triangle and line rasterization.
  133.  */
  134. static void
  135. brw_upload_sf_prog(struct brw_context *brw)
  136. {
  137.    struct gl_context *ctx = &brw->ctx;
  138.    struct brw_sf_prog_key key;
  139.    /* _NEW_BUFFERS */
  140.    bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
  141.  
  142.    memset(&key, 0, sizeof(key));
  143.  
  144.    /* Populate the key, noting state dependencies:
  145.     */
  146.    /* BRW_NEW_VUE_MAP_GEOM_OUT */
  147.    key.attrs = brw->vue_map_geom_out.slots_valid;
  148.  
  149.    /* BRW_NEW_REDUCED_PRIMITIVE */
  150.    switch (brw->reduced_primitive) {
  151.    case GL_TRIANGLES:
  152.       /* NOTE: We just use the edgeflag attribute as an indicator that
  153.        * unfilled triangles are active.  We don't actually do the
  154.        * edgeflag testing here, it is already done in the clip
  155.        * program.
  156.        */
  157.       if (key.attrs & BITFIELD64_BIT(VARYING_SLOT_EDGE))
  158.          key.primitive = SF_UNFILLED_TRIS;
  159.       else
  160.          key.primitive = SF_TRIANGLES;
  161.       break;
  162.    case GL_LINES:
  163.       key.primitive = SF_LINES;
  164.       break;
  165.    case GL_POINTS:
  166.       key.primitive = SF_POINTS;
  167.       break;
  168.    }
  169.  
  170.    /* _NEW_TRANSFORM */
  171.    key.userclip_active = (ctx->Transform.ClipPlanesEnabled != 0);
  172.  
  173.    /* _NEW_POINT */
  174.    key.do_point_sprite = ctx->Point.PointSprite;
  175.    if (key.do_point_sprite) {
  176.       int i;
  177.  
  178.       for (i = 0; i < 8; i++) {
  179.          if (ctx->Point.CoordReplace[i])
  180.             key.point_sprite_coord_replace |= (1 << i);
  181.       }
  182.    }
  183.    if (brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(VARYING_SLOT_PNTC))
  184.       key.do_point_coord = 1;
  185.    /*
  186.     * Window coordinates in a FBO are inverted, which means point
  187.     * sprite origin must be inverted, too.
  188.     */
  189.    if ((ctx->Point.SpriteOrigin == GL_LOWER_LEFT) != render_to_fbo)
  190.       key.sprite_origin_lower_left = true;
  191.  
  192.    /* _NEW_LIGHT | _NEW_PROGRAM */
  193.    key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
  194.    key.do_twoside_color = ((ctx->Light.Enabled && ctx->Light.Model.TwoSide) ||
  195.                            ctx->VertexProgram._TwoSideEnabled);
  196.  
  197.    /* _NEW_POLYGON */
  198.    if (key.do_twoside_color) {
  199.       /* If we're rendering to a FBO, we have to invert the polygon
  200.        * face orientation, just as we invert the viewport in
  201.        * sf_unit_create_from_key().
  202.        */
  203.       key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW) != render_to_fbo;
  204.    }
  205.  
  206.    if (!brw_search_cache(&brw->cache, BRW_SF_PROG,
  207.                          &key, sizeof(key),
  208.                          &brw->sf.prog_offset, &brw->sf.prog_data)) {
  209.       compile_sf_prog( brw, &key );
  210.    }
  211. }
  212.  
  213.  
  214. const struct brw_tracked_state brw_sf_prog = {
  215.    .dirty = {
  216.       .mesa  = (_NEW_HINT | _NEW_LIGHT | _NEW_POLYGON | _NEW_POINT |
  217.                 _NEW_TRANSFORM | _NEW_BUFFERS | _NEW_PROGRAM),
  218.       .brw   = (BRW_NEW_REDUCED_PRIMITIVE | BRW_NEW_VUE_MAP_GEOM_OUT)
  219.    },
  220.    .emit = brw_upload_sf_prog
  221. };
  222.  
  223.