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 /* $XFree86: xc/lib/GL/mesa/src/drv/sis/sis_stencil.c,v 1.3 2000/09/26 15:56:49 tsi Exp $ */
  28
  29 /*
  30  * Authors:
  31  *   Sung-Ching Lin <sclin@sis.com.tw>
  32  *   Eric Anholt <anholt@FreeBSD.org>
  33  */
  34
  35 #include "sis_context.h"
  36 #include "sis_state.h"
  37 #include "sis_stencil.h"
  38
  39 static void
  40 sisDDStencilFuncSeparate( GLcontext * ctx, GLenum face,
  41                           GLenum func, GLint ref, GLuint mask )
  42 {
  43   sisContextPtr smesa = SIS_CONTEXT(ctx);
  44   __GLSiSHardware *prev = &smesa->prev;
  45   __GLSiSHardware *current = &smesa->current;
  46
  47    /* set reference */
  48    current->hwStSetting = (STENCIL_FORMAT_8 |
  49                            ((ctx->Stencil.Ref[0] & 0xff) << 8) |
  50                            (ctx->Stencil.ValueMask[0] & 0xff));
  51
  52   switch (func)
  53     {
  54     case GL_NEVER:
  55       current->hwStSetting |= SiS_STENCIL_NEVER;
  56       break;
  57     case GL_LESS:
  58       current->hwStSetting |= SiS_STENCIL_LESS;
  59       break;
  60     case GL_EQUAL:
  61       current->hwStSetting |= SiS_STENCIL_EQUAL;
  62       break;
  63     case GL_LEQUAL:
  64       current->hwStSetting |= SiS_STENCIL_LEQUAL;
  65       break;
  66     case GL_GREATER:
  67       current->hwStSetting |= SiS_STENCIL_GREATER;
  68       break;
  69     case GL_NOTEQUAL:
  70       current->hwStSetting |= SiS_STENCIL_NOTEQUAL;
  71       break;
  72     case GL_GEQUAL:
  73       current->hwStSetting |= SiS_STENCIL_GEQUAL;
  74       break;
  75     case GL_ALWAYS:
  76       current->hwStSetting |= SiS_STENCIL_ALWAYS;
  77       break;
  78     }
  79
  80    if (current->hwStSetting != prev->hwStSetting)
  81    {
  82       prev->hwStSetting = current->hwStSetting;
  83
  84       smesa->GlobalFlag |= GFLAG_STENCILSETTING;
  85    }
  86 }
  87
  88 static void
  89 sisDDStencilMaskSeparate( GLcontext * ctx, GLenum face, GLuint mask )
  90 {
  91   if (!ctx->Visual.stencilBits)
  92     return;
  93
  94   /* set Z buffer Write Enable */
  95   sisDDDepthMask (ctx, ctx->Depth.Mask);
  96 }
  97
  98 static void
  99 sisDDStencilOpSeparate( GLcontext * ctx, GLenum face, GLenum fail,
 100                         GLenum zfail, GLenum zpass )
 101 {
 102   sisContextPtr smesa = SIS_CONTEXT(ctx);
 103   __GLSiSHardware *prev = &smesa->prev;
 104   __GLSiSHardware *current = &smesa->current;
 105
 106    current->hwStSetting2 &= ~(MASK_StencilZPassOp | MASK_StencilZFailOp |
 107       MASK_StencilFailOp);
 108
 109   switch (fail)
 110     {
 111     case GL_KEEP:
 112       current->hwStSetting2 |= SiS_SFAIL_KEEP;
 113       break;
 114     case GL_ZERO:
 115       current->hwStSetting2 |= SiS_SFAIL_ZERO;
 116       break;
 117     case GL_REPLACE:
 118       current->hwStSetting2 |= SiS_SFAIL_REPLACE;
 119       break;
 120     case GL_INVERT:
 121       current->hwStSetting2 |= SiS_SFAIL_INVERT;
 122       break;
 123     case GL_INCR:
 124       current->hwStSetting2 |= SiS_SFAIL_INCR;
 125       break;
 126     case GL_DECR:
 127       current->hwStSetting2 |= SiS_SFAIL_DECR;
 128       break;
 129     case GL_INCR_WRAP:
 130       current->hwStSetting2 |= SiS_SFAIL_INCR_WRAP;
 131       break;
 132     case GL_DECR_WRAP:
 133       current->hwStSetting2 |= SiS_SFAIL_DECR_WRAP;
 134       break;
 135     }
 136
 137   switch (zfail)
 138     {
 139     case GL_KEEP:
 140       current->hwStSetting2 |= SiS_SPASS_ZFAIL_KEEP;
 141       break;
 142     case GL_ZERO:
 143       current->hwStSetting2 |= SiS_SPASS_ZFAIL_ZERO;
 144       break;
 145     case GL_REPLACE:
 146       current->hwStSetting2 |= SiS_SPASS_ZFAIL_REPLACE;
 147       break;
 148     case GL_INVERT:
 149       current->hwStSetting2 |= SiS_SPASS_ZFAIL_INVERT;
 150       break;
 151     case GL_INCR:
 152       current->hwStSetting2 |= SiS_SPASS_ZFAIL_INCR;
 153       break;
 154     case GL_DECR:
 155       current->hwStSetting2 |= SiS_SPASS_ZFAIL_DECR;
 156       break;
 157     case GL_INCR_WRAP:
 158       current->hwStSetting2 |= SiS_SPASS_ZFAIL_INCR_WRAP;
 159       break;
 160     case GL_DECR_WRAP:
 161       current->hwStSetting2 |= SiS_SPASS_ZFAIL_DECR_WRAP;
 162       break;
 163     }
 164
 165   switch (zpass)
 166     {
 167     case GL_KEEP:
 168       current->hwStSetting2 |= SiS_SPASS_ZPASS_KEEP;
 169       break;
 170     case GL_ZERO:
 171       current->hwStSetting2 |= SiS_SPASS_ZPASS_ZERO;
 172       break;
 173     case GL_REPLACE:
 174       current->hwStSetting2 |= SiS_SPASS_ZPASS_REPLACE;
 175       break;
 176     case GL_INVERT:
 177       current->hwStSetting2 |= SiS_SPASS_ZPASS_INVERT;
 178       break;
 179     case GL_INCR:
 180       current->hwStSetting2 |= SiS_SPASS_ZPASS_INCR;
 181       break;
 182     case GL_DECR:
 183       current->hwStSetting2 |= SiS_SPASS_ZPASS_DECR;
 184       break;
 185     case GL_INCR_WRAP:
 186       current->hwStSetting2 |= SiS_SPASS_ZPASS_INCR_WRAP;
 187       break;
 188     case GL_DECR_WRAP:
 189       current->hwStSetting2 |= SiS_SPASS_ZPASS_DECR_WRAP;
 190       break;
 191     }
 192
 193    if (current->hwStSetting2 != prev->hwStSetting2)
 194    {
 195       prev->hwStSetting2 = current->hwStSetting2;
 196       smesa->GlobalFlag |= GFLAG_STENCILSETTING;
 197    }
 198 }
 199
 200 void
 201 sisDDInitStencilFuncs( GLcontext *ctx )
 202 {
 203   ctx->Driver.StencilFuncSeparate = sisDDStencilFuncSeparate;
 204   ctx->Driver.StencilMaskSeparate = sisDDStencilMaskSeparate;
 205   ctx->Driver.StencilOpSeparate   = sisDDStencilOpSeparate;
 206 }