src/mesa/drivers/dri/i965/brw_sf.c

   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/enums.h"
  36
  37 #include "intel_batchbuffer.h"
  38
  39 #include "brw_defines.h"
  40 #include "brw_context.h"
  41 #include "brw_eu.h"
  42 #include "brw_util.h"
  43 #include "brw_sf.h"
  44 #include "brw_state.h"
  45
  46 #include "glsl/ralloc.h"
  47
  48 static void compile_sf_prog( struct brw_context *brw,
  49                              struct brw_sf_prog_key *key )
  50 {
  51    struct intel_context *intel = &brw->intel;
  52    struct brw_sf_compile c;
  53    const GLuint *program;
  54    void *mem_ctx;
  55    GLuint program_size;
  56    GLuint i;
  57
  58    memset(&c, 0, sizeof(c));
  59
  60    mem_ctx = ralloc_context(NULL);
  61    /* Begin the compilation:
  62     */
  63    brw_init_compile(brw, &c.func, mem_ctx);
  64
  65    c.key = *key;
  66    brw_compute_vue_map(&c.vue_map, intel, brw->vs.prog_data);
  67    c.urb_entry_read_offset = brw_sf_compute_urb_entry_read_offset(intel);
  68    c.nr_attr_regs = (c.vue_map.num_slots + 1)/2 - c.urb_entry_read_offset;
  69    c.nr_setup_regs = c.nr_attr_regs;
  70
  71    c.prog_data.urb_read_length = c.nr_attr_regs;
  72    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  73
  74    /* Which primitive?  Or all three?
  75     */
  76    switch (key->primitive) {
  77    case SF_TRIANGLES:
  78       c.nr_verts = 3;
  79       brw_emit_tri_setup( &c, true );
  80       break;
  81    case SF_LINES:
  82       c.nr_verts = 2;
  83       brw_emit_line_setup( &c, true );
  84       break;
  85    case SF_POINTS:
  86       c.nr_verts = 1;
  87       if (key->do_point_sprite)
  88           brw_emit_point_sprite_setup( &c, true );
  89       else
  90           brw_emit_point_setup( &c, true );
  91       break;
  92    case SF_UNFILLED_TRIS:
  93       c.nr_verts = 3;
  94       brw_emit_anyprim_setup( &c );
  95       break;
  96    default:
  97       assert(0);
  98       return;
  99    }
 100
 101    /* get the program
 102     */
 103    program = brw_get_program(&c.func, &program_size);
 104
 105    if (unlikely(INTEL_DEBUG & DEBUG_SF)) {
 106       printf("sf:\n");
 107       for (i = 0; i < program_size / sizeof(struct brw_instruction); i++)
 108          brw_disasm(stdout, &((struct brw_instruction *)program)[i],
 109                     intel->gen);
 110       printf("\n");
 111    }
 112
 113    brw_upload_cache(&brw->cache, BRW_SF_PROG,
 114                     &c.key, sizeof(c.key),
 115                     program, program_size,
 116                     &c.prog_data, sizeof(c.prog_data),
 117                     &brw->sf.prog_offset, &brw->sf.prog_data);
 118    ralloc_free(mem_ctx);
 119 }
 120
 121 /* Calculate interpolants for triangle and line rasterization.
 122  */
 123 static void
 124 brw_upload_sf_prog(struct brw_context *brw)
 125 {
 126    struct gl_context *ctx = &brw->intel.ctx;
 127    struct brw_sf_prog_key key;
 128
 129    memset(&key, 0, sizeof(key));
 130
 131    /* Populate the key, noting state dependencies:
 132     */
 133    /* CACHE_NEW_VS_PROG */
 134    key.attrs = brw->vs.prog_data->outputs_written;
 135
 136    /* BRW_NEW_REDUCED_PRIMITIVE */
 137    switch (brw->intel.reduced_primitive) {
 138    case GL_TRIANGLES:
 139       /* NOTE: We just use the edgeflag attribute as an indicator that
 140        * unfilled triangles are active.  We don't actually do the
 141        * edgeflag testing here, it is already done in the clip
 142        * program.
 143        */
 144       if (key.attrs & BITFIELD64_BIT(VERT_RESULT_EDGE))
 145          key.primitive = SF_UNFILLED_TRIS;
 146       else
 147          key.primitive = SF_TRIANGLES;
 148       break;
 149    case GL_LINES:
 150       key.primitive = SF_LINES;
 151       break;
 152    case GL_POINTS:
 153       key.primitive = SF_POINTS;
 154       break;
 155    }
 156
 157    /* _NEW_TRANSFORM */
 158    key.userclip_active = (ctx->Transform.ClipPlanesEnabled != 0);
 159
 160    /* _NEW_POINT */
 161    key.do_point_sprite = ctx->Point.PointSprite;
 162    if (key.do_point_sprite) {
 163       int i;
 164
 165       for (i = 0; i < 8; i++) {
 166          if (ctx->Point.CoordReplace[i])
 167             key.point_sprite_coord_replace |= (1 << i);
 168       }
 169    }
 170    key.sprite_origin_lower_left = (ctx->Point.SpriteOrigin == GL_LOWER_LEFT);
 171    /* _NEW_LIGHT */
 172    key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
 173    key.do_twoside_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 174
 175    /* _NEW_POLYGON */
 176    if (key.do_twoside_color) {
 177       /* If we're rendering to a FBO, we have to invert the polygon
 178        * face orientation, just as we invert the viewport in
 179        * sf_unit_create_from_key().  ctx->DrawBuffer->Name will be
 180        * nonzero if we're rendering to such an FBO.
 181        */
 182       key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW) ^ (ctx->DrawBuffer->Name != 0);
 183    }
 184
 185    if (!brw_search_cache(&brw->cache, BRW_SF_PROG,
 186                          &key, sizeof(key),
 187                          &brw->sf.prog_offset, &brw->sf.prog_data)) {
 188       compile_sf_prog( brw, &key );
 189    }
 190 }
 191
 192
 193 const struct brw_tracked_state brw_sf_prog = {
 194    .dirty = {
 195       .mesa  = (_NEW_HINT | _NEW_LIGHT | _NEW_POLYGON | _NEW_POINT | _NEW_TRANSFORM),
 196       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 197       .cache = CACHE_NEW_VS_PROG
 198    },
 199    .emit = brw_upload_sf_prog
 200 };
 201