src/mesa/drivers/dri/sis/sis_stencil.c

   1 /**************************************************************************
   2
   3 Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
   4 Copyright 2003 Eric Anholt
   5 All Rights Reserved.
   6
   7 Permission is hereby granted, free of charge, to any person obtaining a
   8 copy of this software and associated documentation files (the "Software"),
   9 to deal in the Software without restriction, including without limitation
  10 on the rights to use, copy, modify, merge, publish, distribute, sub
  11 license, and/or sell copies of the Software, and to permit persons to whom
  12 the Software is furnished to do so, subject to the following conditions:
  13
  14 The above copyright notice and this permission notice (including the next
  15 paragraph) shall be included in all copies or substantial portions of the
  16 Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21 ERIC ANHOLT OR SILICON INTEGRATED SYSTEMS CORP BE LIABLE FOR ANY CLAIM,
  22 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24 USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27
  28 /*
  29  * Authors:
  30  *   Sung-Ching Lin <sclin@sis.com.tw>
  31  *   Eric Anholt <anholt@FreeBSD.org>
  32  */
  33
  34 #include "sis_context.h"
  35 #include "sis_state.h"
  36 #include "sis_stencil.h"
  37
  38 static void
  39 sisDDStencilFuncSeparate( GLcontext * ctx, GLenum face,
  40                           GLenum func, GLint ref, GLuint mask )
  41 {
  42   sisContextPtr smesa = SIS_CONTEXT(ctx);
  43   __GLSiSHardware *prev = &smesa->prev;
  44   __GLSiSHardware *current = &smesa->current;
  45
  46    /* set reference */
  47    current->hwStSetting = (STENCIL_FORMAT_8 |
  48                            ((ctx->Stencil.Ref[0] & 0xff) << 8) |
  49                            (ctx->Stencil.ValueMask[0] & 0xff));
  50
  51   switch (func)
  52     {
  53     case GL_NEVER:
  54       current->hwStSetting |= SiS_STENCIL_NEVER;
  55       break;
  56     case GL_LESS:
  57       current->hwStSetting |= SiS_STENCIL_LESS;
  58       break;
  59     case GL_EQUAL:
  60       current->hwStSetting |= SiS_STENCIL_EQUAL;
  61       break;
  62     case GL_LEQUAL:
  63       current->hwStSetting |= SiS_STENCIL_LEQUAL;
  64       break;
  65     case GL_GREATER:
  66       current->hwStSetting |= SiS_STENCIL_GREATER;
  67       break;
  68     case GL_NOTEQUAL:
  69       current->hwStSetting |= SiS_STENCIL_NOTEQUAL;
  70       break;
  71     case GL_GEQUAL:
  72       current->hwStSetting |= SiS_STENCIL_GEQUAL;
  73       break;
  74     case GL_ALWAYS:
  75       current->hwStSetting |= SiS_STENCIL_ALWAYS;
  76       break;
  77     }
  78
  79    if (current->hwStSetting != prev->hwStSetting)
  80    {
  81       prev->hwStSetting = current->hwStSetting;
  82
  83       smesa->GlobalFlag |= GFLAG_STENCILSETTING;
  84    }
  85 }
  86
  87 static void
  88 sisDDStencilMaskSeparate( GLcontext * ctx, GLenum face, GLuint mask )
  89 {
  90   if (!ctx->Visual.stencilBits)
  91     return;
  92
  93   /* set Z buffer Write Enable */
  94   sisDDDepthMask (ctx, ctx->Depth.Mask);
  95 }
  96
  97 static void
  98 sisDDStencilOpSeparate( GLcontext * ctx, GLenum face, GLenum fail,
  99                         GLenum zfail, GLenum zpass )
 100 {
 101   sisContextPtr smesa = SIS_CONTEXT(ctx);
 102   __GLSiSHardware *prev = &smesa->prev;
 103   __GLSiSHardware *current = &smesa->current;
 104
 105    current->hwStSetting2 &= ~(MASK_StencilZPassOp | MASK_StencilZFailOp |
 106       MASK_StencilFailOp);
 107
 108   switch (fail)
 109     {
 110     case GL_KEEP:
 111       current->hwStSetting2 |= SiS_SFAIL_KEEP;
 112       break;
 113     case GL_ZERO:
 114       current->hwStSetting2 |= SiS_SFAIL_ZERO;
 115       break;
 116     case GL_REPLACE:
 117       current->hwStSetting2 |= SiS_SFAIL_REPLACE;
 118       break;
 119     case GL_INVERT:
 120       current->hwStSetting2 |= SiS_SFAIL_INVERT;
 121       break;
 122     case GL_INCR:
 123       current->hwStSetting2 |= SiS_SFAIL_INCR;
 124       break;
 125     case GL_DECR:
 126       current->hwStSetting2 |= SiS_SFAIL_DECR;
 127       break;
 128     case GL_INCR_WRAP:
 129       current->hwStSetting2 |= SiS_SFAIL_INCR_WRAP;
 130       break;
 131     case GL_DECR_WRAP:
 132       current->hwStSetting2 |= SiS_SFAIL_DECR_WRAP;
 133       break;
 134     }
 135
 136   switch (zfail)
 137     {
 138     case GL_KEEP:
 139       current->hwStSetting2 |= SiS_SPASS_ZFAIL_KEEP;
 140       break;
 141     case GL_ZERO:
 142       current->hwStSetting2 |= SiS_SPASS_ZFAIL_ZERO;
 143       break;
 144     case GL_REPLACE:
 145       current->hwStSetting2 |= SiS_SPASS_ZFAIL_REPLACE;
 146       break;
 147     case GL_INVERT:
 148       current->hwStSetting2 |= SiS_SPASS_ZFAIL_INVERT;
 149       break;
 150     case GL_INCR:
 151       current->hwStSetting2 |= SiS_SPASS_ZFAIL_INCR;
 152       break;
 153     case GL_DECR:
 154       current->hwStSetting2 |= SiS_SPASS_ZFAIL_DECR;
 155       break;
 156     case GL_INCR_WRAP:
 157       current->hwStSetting2 |= SiS_SPASS_ZFAIL_INCR_WRAP;
 158       break;
 159     case GL_DECR_WRAP:
 160       current->hwStSetting2 |= SiS_SPASS_ZFAIL_DECR_WRAP;
 161       break;
 162     }
 163
 164   switch (zpass)
 165     {
 166     case GL_KEEP:
 167       current->hwStSetting2 |= SiS_SPASS_ZPASS_KEEP;
 168       break;
 169     case GL_ZERO:
 170       current->hwStSetting2 |= SiS_SPASS_ZPASS_ZERO;
 171       break;
 172     case GL_REPLACE:
 173       current->hwStSetting2 |= SiS_SPASS_ZPASS_REPLACE;
 174       break;
 175     case GL_INVERT:
 176       current->hwStSetting2 |= SiS_SPASS_ZPASS_INVERT;
 177       break;
 178     case GL_INCR:
 179       current->hwStSetting2 |= SiS_SPASS_ZPASS_INCR;
 180       break;
 181     case GL_DECR:
 182       current->hwStSetting2 |= SiS_SPASS_ZPASS_DECR;
 183       break;
 184     case GL_INCR_WRAP:
 185       current->hwStSetting2 |= SiS_SPASS_ZPASS_INCR_WRAP;
 186       break;
 187     case GL_DECR_WRAP:
 188       current->hwStSetting2 |= SiS_SPASS_ZPASS_DECR_WRAP;
 189       break;
 190     }
 191
 192    if (current->hwStSetting2 != prev->hwStSetting2)
 193    {
 194       prev->hwStSetting2 = current->hwStSetting2;
 195       smesa->GlobalFlag |= GFLAG_STENCILSETTING;
 196    }
 197 }
 198
 199 void
 200 sisDDInitStencilFuncs( GLcontext *ctx )
 201 {
 202   ctx->Driver.StencilFuncSeparate = sisDDStencilFuncSeparate;
 203   ctx->Driver.StencilMaskSeparate = sisDDStencilMaskSeparate;
 204   ctx->Driver.StencilOpSeparate   = sisDDStencilOpSeparate;
 205 }