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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * 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, sub license, 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 portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  
  28.  
  29. #include "draw/draw_pipe.h"
  30. #include "util/u_math.h"
  31. #include "util/u_memory.h"
  32. #include "util/u_pack_color.h"
  33.  
  34. #include "i915_context.h"
  35. #include "i915_reg.h"
  36. #include "i915_state.h"
  37. #include "i915_batch.h"
  38.  
  39.  
  40.  
  41. /**
  42.  * Primitive emit to hardware.  No support for vertex buffers or any
  43.  * nice fast paths.
  44.  */
  45. struct setup_stage {
  46.    struct draw_stage stage; /**< This must be first (base class) */
  47.  
  48.    struct i915_context *i915;  
  49. };
  50.  
  51.  
  52.  
  53. /**
  54.  * Basically a cast wrapper.
  55.  */
  56. static INLINE struct setup_stage *setup_stage( struct draw_stage *stage )
  57. {
  58.    return (struct setup_stage *)stage;
  59. }
  60.  
  61.  
  62. /**
  63.  * Extract the needed fields from vertex_header and emit i915 dwords.
  64.  * Recall that the vertices are constructed by the 'draw' module and
  65.  * have a couple of slots at the beginning (1-dword header, 4-dword
  66.  * clip pos) that we ignore here.
  67.  */
  68. static INLINE void
  69. emit_hw_vertex( struct i915_context *i915,
  70.                 const struct vertex_header *vertex)
  71. {
  72.    const struct vertex_info *vinfo = &i915->current.vertex_info;
  73.    uint i;
  74.    uint count = 0;  /* for debug/sanity */
  75.  
  76.    assert(!i915->dirty);
  77.  
  78.    for (i = 0; i < vinfo->num_attribs; i++) {
  79.       const uint j = vinfo->attrib[i].src_index;
  80.       const float *attrib = vertex->data[j];
  81.       switch (vinfo->attrib[i].emit) {
  82.       case EMIT_1F:
  83.          OUT_BATCH( fui(attrib[0]) );
  84.          count++;
  85.          break;
  86.       case EMIT_2F:
  87.          OUT_BATCH( fui(attrib[0]) );
  88.          OUT_BATCH( fui(attrib[1]) );
  89.          count += 2;
  90.          break;
  91.       case EMIT_3F:
  92.          OUT_BATCH( fui(attrib[0]) );
  93.          OUT_BATCH( fui(attrib[1]) );
  94.          OUT_BATCH( fui(attrib[2]) );
  95.          count += 3;
  96.          break;
  97.       case EMIT_4F:
  98.          OUT_BATCH( fui(attrib[0]) );
  99.          OUT_BATCH( fui(attrib[1]) );
  100.          OUT_BATCH( fui(attrib[2]) );
  101.          OUT_BATCH( fui(attrib[3]) );
  102.          count += 4;
  103.          break;
  104.       case EMIT_4UB:
  105.          OUT_BATCH( pack_ub4(float_to_ubyte( attrib[0] ),
  106.                              float_to_ubyte( attrib[1] ),
  107.                              float_to_ubyte( attrib[2] ),
  108.                              float_to_ubyte( attrib[3] )) );
  109.          count += 1;
  110.          break;
  111.       case EMIT_4UB_BGRA:
  112.          OUT_BATCH( pack_ub4(float_to_ubyte( attrib[2] ),
  113.                              float_to_ubyte( attrib[1] ),
  114.                              float_to_ubyte( attrib[0] ),
  115.                              float_to_ubyte( attrib[3] )) );
  116.          count += 1;
  117.          break;
  118.       default:
  119.          assert(0);
  120.       }
  121.    }
  122.    assert(count == vinfo->size);
  123. }
  124.  
  125.  
  126.  
  127. static INLINE void
  128. emit_prim( struct draw_stage *stage,
  129.            struct prim_header *prim,
  130.            unsigned hwprim,
  131.            unsigned nr )
  132. {
  133.    struct i915_context *i915 = setup_stage(stage)->i915;
  134.    unsigned vertex_size;
  135.    unsigned i;
  136.  
  137.    if (i915->dirty)
  138.       i915_update_derived( i915 );
  139.  
  140.    if (i915->hardware_dirty)
  141.       i915_emit_hardware_state( i915 );
  142.  
  143.    /* need to do this after validation! */
  144.    vertex_size = i915->current.vertex_info.size * 4; /* in bytes */
  145.    assert(vertex_size >= 12); /* never smaller than 12 bytes */
  146.  
  147.    if (!BEGIN_BATCH( 1 + nr * vertex_size / 4)) {
  148.       FLUSH_BATCH(NULL, I915_FLUSH_ASYNC);
  149.  
  150.       /* Make sure state is re-emitted after a flush:
  151.        */
  152.       i915_emit_hardware_state( i915 );
  153.  
  154.       if (!BEGIN_BATCH( 1 + nr * vertex_size / 4)) {
  155.          assert(0);
  156.          return;
  157.       }
  158.    }
  159.  
  160.    /* Emit each triangle as a single primitive.  I told you this was
  161.     * simple.
  162.     */
  163.    OUT_BATCH(_3DPRIMITIVE |
  164.              hwprim |
  165.              ((4 + vertex_size * nr)/4 - 2));
  166.  
  167.    for (i = 0; i < nr; i++)
  168.       emit_hw_vertex(i915, prim->v[i]);
  169. }
  170.  
  171.  
  172. static void
  173. setup_tri( struct draw_stage *stage, struct prim_header *prim )
  174. {
  175.    emit_prim( stage, prim, PRIM3D_TRILIST, 3 );
  176. }
  177.  
  178.  
  179. static void
  180. setup_line(struct draw_stage *stage, struct prim_header *prim)
  181. {
  182.    emit_prim( stage, prim, PRIM3D_LINELIST, 2 );
  183. }
  184.  
  185.  
  186. static void
  187. setup_point(struct draw_stage *stage, struct prim_header *prim)
  188. {
  189.    emit_prim( stage, prim, PRIM3D_POINTLIST, 1 );
  190. }
  191.  
  192.  
  193. static void setup_flush( struct draw_stage *stage, unsigned flags )
  194. {
  195. }
  196.  
  197. static void reset_stipple_counter( struct draw_stage *stage )
  198. {
  199. }
  200.  
  201. static void render_destroy( struct draw_stage *stage )
  202. {
  203.    FREE( stage );
  204. }
  205.  
  206.  
  207. /**
  208.  * Create a new primitive setup/render stage.  This gets plugged into
  209.  * the 'draw' module's pipeline.
  210.  */
  211. struct draw_stage *i915_draw_render_stage( struct i915_context *i915 )
  212. {
  213.    struct setup_stage *setup = CALLOC_STRUCT(setup_stage);
  214.  
  215.    setup->i915 = i915;
  216.    setup->stage.draw = i915->draw;
  217.    setup->stage.point = setup_point;
  218.    setup->stage.line = setup_line;
  219.    setup->stage.tri = setup_tri;
  220.    setup->stage.flush = setup_flush;
  221.    setup->stage.reset_stipple_counter = reset_stipple_counter;
  222.    setup->stage.destroy = render_destroy;
  223.  
  224.    return &setup->stage;
  225. }
  226.