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  1. /**********************************************************
  2.  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person
  5.  * obtaining a copy of this software and associated documentation
  6.  * files (the "Software"), to deal in the Software without
  7.  * restriction, including without limitation the rights to use, copy,
  8.  * modify, merge, publish, distribute, sublicense, and/or sell copies
  9.  * of the Software, and to permit persons to whom the Software is
  10.  * furnished to do so, subject to the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice shall be
  13.  * included in all copies or substantial portions of the Software.
  14.  *
  15.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18.  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19.  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20.  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22.  * SOFTWARE.
  23.  *
  24.  **********************************************************/
  25.  
  26. #include "util/u_inlines.h"
  27. #include "pipe/p_defines.h"
  28. #include "util/u_math.h"
  29. #include "util/u_memory.h"
  30.  
  31. #include "svga_context.h"
  32. #include "svga_hw_reg.h"
  33.  
  34.  
  35. static INLINE unsigned
  36. svga_translate_compare_func(unsigned func)
  37. {
  38.    switch (func) {
  39.    case PIPE_FUNC_NEVER:     return SVGA3D_CMP_NEVER;
  40.    case PIPE_FUNC_LESS:      return SVGA3D_CMP_LESS;
  41.    case PIPE_FUNC_LEQUAL:    return SVGA3D_CMP_LESSEQUAL;
  42.    case PIPE_FUNC_GREATER:   return SVGA3D_CMP_GREATER;
  43.    case PIPE_FUNC_GEQUAL:    return SVGA3D_CMP_GREATEREQUAL;
  44.    case PIPE_FUNC_NOTEQUAL:  return SVGA3D_CMP_NOTEQUAL;
  45.    case PIPE_FUNC_EQUAL:     return SVGA3D_CMP_EQUAL;
  46.    case PIPE_FUNC_ALWAYS:    return SVGA3D_CMP_ALWAYS;
  47.    default:
  48.       assert(0);
  49.       return SVGA3D_CMP_ALWAYS;
  50.    }
  51. }
  52.  
  53. static INLINE unsigned
  54. svga_translate_stencil_op(unsigned op)
  55. {
  56.    switch (op) {
  57.    case PIPE_STENCIL_OP_KEEP:      return SVGA3D_STENCILOP_KEEP;
  58.    case PIPE_STENCIL_OP_ZERO:      return SVGA3D_STENCILOP_ZERO;
  59.    case PIPE_STENCIL_OP_REPLACE:   return SVGA3D_STENCILOP_REPLACE;
  60.    case PIPE_STENCIL_OP_INCR:      return SVGA3D_STENCILOP_INCRSAT;
  61.    case PIPE_STENCIL_OP_DECR:      return SVGA3D_STENCILOP_DECRSAT;
  62.    case PIPE_STENCIL_OP_INCR_WRAP: return SVGA3D_STENCILOP_INCR;
  63.    case PIPE_STENCIL_OP_DECR_WRAP: return SVGA3D_STENCILOP_DECR;
  64.    case PIPE_STENCIL_OP_INVERT:    return SVGA3D_STENCILOP_INVERT;
  65.    default:
  66.       assert(0);
  67.       return SVGA3D_STENCILOP_KEEP;
  68.    }
  69. }
  70.  
  71.  
  72. static void *
  73. svga_create_depth_stencil_state(struct pipe_context *pipe,
  74.                                 const struct pipe_depth_stencil_alpha_state *templ)
  75. {
  76.    struct svga_depth_stencil_state *ds = CALLOC_STRUCT( svga_depth_stencil_state );
  77.  
  78.    /* Don't try to figure out CW/CCW correspondence with
  79.     * stencil[0]/[1] at this point.  Presumably this can change as
  80.     * back/front face are modified.
  81.     */
  82.    ds->stencil[0].enabled = templ->stencil[0].enabled;
  83.    if (ds->stencil[0].enabled) {
  84.       ds->stencil[0].func  = svga_translate_compare_func(templ->stencil[0].func);
  85.       ds->stencil[0].fail  = svga_translate_stencil_op(templ->stencil[0].fail_op);
  86.       ds->stencil[0].zfail = svga_translate_stencil_op(templ->stencil[0].zfail_op);
  87.       ds->stencil[0].pass  = svga_translate_stencil_op(templ->stencil[0].zpass_op);
  88.      
  89.       /* SVGA3D has one ref/mask/writemask triple shared between front &
  90.        * back face stencil.  We really need two:
  91.        */
  92.       ds->stencil_mask      = templ->stencil[0].valuemask & 0xff;
  93.       ds->stencil_writemask = templ->stencil[0].writemask & 0xff;
  94.    }
  95.  
  96.  
  97.    ds->stencil[1].enabled = templ->stencil[1].enabled;
  98.    if (templ->stencil[1].enabled) {
  99.       ds->stencil[1].func   = svga_translate_compare_func(templ->stencil[1].func);
  100.       ds->stencil[1].fail   = svga_translate_stencil_op(templ->stencil[1].fail_op);
  101.       ds->stencil[1].zfail  = svga_translate_stencil_op(templ->stencil[1].zfail_op);
  102.       ds->stencil[1].pass   = svga_translate_stencil_op(templ->stencil[1].zpass_op);
  103.  
  104.       ds->stencil_mask      = templ->stencil[1].valuemask & 0xff;
  105.       ds->stencil_writemask = templ->stencil[1].writemask & 0xff;
  106.    }
  107.  
  108.  
  109.    ds->zenable = templ->depth.enabled;
  110.    if (ds->zenable) {
  111.       ds->zfunc = svga_translate_compare_func(templ->depth.func);
  112.       ds->zwriteenable = templ->depth.writemask;
  113.    }
  114.  
  115.    ds->alphatestenable = templ->alpha.enabled;
  116.    if (ds->alphatestenable) {
  117.       ds->alphafunc = svga_translate_compare_func(templ->alpha.func);
  118.       ds->alpharef = templ->alpha.ref_value;
  119.    }
  120.  
  121.    return ds;
  122. }
  123.  
  124. static void svga_bind_depth_stencil_state(struct pipe_context *pipe,
  125.                                           void *depth_stencil)
  126. {
  127.    struct svga_context *svga = svga_context(pipe);
  128.  
  129.    svga->curr.depth = (const struct svga_depth_stencil_state *)depth_stencil;
  130.    svga->dirty |= SVGA_NEW_DEPTH_STENCIL;
  131. }
  132.  
  133. static void svga_delete_depth_stencil_state(struct pipe_context *pipe,
  134.                                             void *depth_stencil)
  135. {
  136.    FREE(depth_stencil);
  137. }
  138.  
  139.  
  140. static void svga_set_stencil_ref( struct pipe_context *pipe,
  141.                                   const struct pipe_stencil_ref *stencil_ref )
  142. {
  143.    struct svga_context *svga = svga_context(pipe);
  144.  
  145.    svga->curr.stencil_ref = *stencil_ref;
  146.  
  147.    svga->dirty |= SVGA_NEW_STENCIL_REF;
  148. }
  149.  
  150. static void
  151. svga_set_sample_mask(struct pipe_context *pipe,
  152.                      unsigned sample_mask)
  153. {
  154. }
  155.  
  156.  
  157. void svga_init_depth_stencil_functions( struct svga_context *svga )
  158. {
  159.    svga->pipe.create_depth_stencil_alpha_state = svga_create_depth_stencil_state;
  160.    svga->pipe.bind_depth_stencil_alpha_state = svga_bind_depth_stencil_state;
  161.    svga->pipe.delete_depth_stencil_alpha_state = svga_delete_depth_stencil_state;
  162.  
  163.    svga->pipe.set_stencil_ref = svga_set_stencil_ref;
  164.    svga->pipe.set_sample_mask = svga_set_sample_mask;
  165. }
  166.  
  167.  
  168.  
  169.  
  170.