add the SiS driver - no kernel driver yet

(build tested, but not physically tested)

1 files changed, 185 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/sis/sis_stencil.c b/src/mesa/drivers/dri/sis/sis_stencil.c
new file mode 100644
index 0000000000..3d7a1d5e6a
--- /dev/null
+++ b/src/mesa/drivers/dri/sis/sis_stencil.c
@@ -0,0 +1,185 @@
+/**************************************************************************
+
+Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
+Copyright 2003 Eric Anholt
+All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+on the rights to use, copy, modify, merge, publish, distribute, sub
+license, and/or sell copies of the Software, and to permit persons to whom
+the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ATI, PRECISION INSIGHT AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+**************************************************************************/
+/* $XFree86: xc/lib/GL/mesa/src/drv/sis/sis_stencil.c,v 1.3 2000/09/26 15:56:49 tsi Exp $ */
+
+/*
+ * Authors:
+ *   Sung-Ching Lin <sclin@sis.com.tw>
+ *   Eric Anholt <anholt@FreeBSD.org>
+ */
+
+#include "sis_context.h"
+#include "sis_state.h"
+#include "sis_stencil.h"
+
+static void
+sisDDStencilFunc( GLcontext * ctx, GLenum func, GLint ref, GLuint mask )
+{
+  sisContextPtr smesa = SIS_CONTEXT(ctx);
+  __GLSiSHardware *prev = &smesa->prev;
+  __GLSiSHardware *current = &smesa->current;
+
+   /* set reference */ 
+   current->hwStSetting = STENCIL_FORMAT_8 | (ctx->Stencil.Ref[0] << 8) |
+      ctx->Stencil.ValueMask[0];
+
+  switch (func)
+    {
+    case GL_NEVER:
+      current->hwStSetting |= SiS_STENCIL_NEVER;
+      break;
+    case GL_LESS:
+      current->hwStSetting |= SiS_STENCIL_LESS;
+      break;
+    case GL_EQUAL:
+      current->hwStSetting |= SiS_STENCIL_EQUAL;
+      break;
+    case GL_LEQUAL:
+      current->hwStSetting |= SiS_STENCIL_LEQUAL;
+      break;
+    case GL_GREATER:
+      current->hwStSetting |= SiS_STENCIL_GREATER;
+      break;
+    case GL_NOTEQUAL:
+      current->hwStSetting |= SiS_STENCIL_NOTEQUAL;
+      break;
+    case GL_GEQUAL:
+      current->hwStSetting |= SiS_STENCIL_GEQUAL;
+      break;
+    case GL_ALWAYS:
+      current->hwStSetting |= SiS_STENCIL_ALWAYS;
+      break;
+    }
+
+   if (current->hwStSetting != prev->hwStSetting)
+   {
+      prev->hwStSetting = current->hwStSetting;
+
+      smesa->GlobalFlag |= GFLAG_STENCILSETTING;
+   }
+}
+
+static void
+sisDDStencilMask( GLcontext * ctx, GLuint mask )
+{
+  if (!ctx->Visual.stencilBits)
+    return;
+
+  /* set Z buffer Write Enable */
+  sisDDDepthMask (ctx, ctx->Depth.Mask);
+}
+
+static void
+sisDDStencilOp( GLcontext * ctx, GLenum fail, GLenum zfail, GLenum zpass )
+{
+  sisContextPtr smesa = SIS_CONTEXT(ctx);
+  __GLSiSHardware *prev = &smesa->prev;
+  __GLSiSHardware *current = &smesa->current;
+
+   current->hwStSetting2 &= ~(MASK_StencilZPassOp | MASK_StencilZFailOp |
+      MASK_StencilFailOp);
+
+  switch (fail)
+    {
+    case GL_KEEP:
+      current->hwStSetting2 |= SiS_SFAIL_KEEP;
+      break;
+    case GL_ZERO:
+      current->hwStSetting2 |= SiS_SFAIL_ZERO;
+      break;
+    case GL_REPLACE:
+      current->hwStSetting2 |= SiS_SFAIL_REPLACE;
+      break;
+    case GL_INVERT:
+      current->hwStSetting2 |= SiS_SFAIL_INVERT;
+      break;
+    case GL_INCR:
+      current->hwStSetting2 |= SiS_SFAIL_INCR;
+      break;
+    case GL_DECR:
+      current->hwStSetting2 |= SiS_SFAIL_DECR;
+      break;
+    }
+
+  switch (zfail)
+    {
+    case GL_KEEP:
+      current->hwStSetting2 |= SiS_SPASS_ZFAIL_KEEP;
+      break;
+    case GL_ZERO:
+      current->hwStSetting2 |= SiS_SPASS_ZFAIL_ZERO;
+      break;
+    case GL_REPLACE:
+      current->hwStSetting2 |= SiS_SPASS_ZFAIL_REPLACE;
+      break;
+    case GL_INVERT:
+      current->hwStSetting2 |= SiS_SPASS_ZFAIL_INVERT;
+      break;
+    case GL_INCR:
+      current->hwStSetting2 |= SiS_SPASS_ZFAIL_INCR;
+      break;
+    case GL_DECR:
+      current->hwStSetting2 |= SiS_SPASS_ZFAIL_DECR;
+      break;
+    }
+
+  switch (zpass)
+    {
+    case GL_KEEP:
+      current->hwStSetting2 |= SiS_SPASS_ZPASS_KEEP;
+      break;
+    case GL_ZERO:
+      current->hwStSetting2 |= SiS_SPASS_ZPASS_ZERO;
+      break;
+    case GL_REPLACE:
+      current->hwStSetting2 |= SiS_SPASS_ZPASS_REPLACE;
+      break;
+    case GL_INVERT:
+      current->hwStSetting2 |= SiS_SPASS_ZPASS_INVERT;
+      break;
+    case GL_INCR:
+      current->hwStSetting2 |= SiS_SPASS_ZPASS_INCR;
+      break;
+    case GL_DECR:
+      current->hwStSetting2 |= SiS_SPASS_ZPASS_DECR;
+      break;
+    }
+
+   if (current->hwStSetting2 != prev->hwStSetting2)
+   {
+      prev->hwStSetting2 = current->hwStSetting2;
+      smesa->GlobalFlag |= GFLAG_STENCILSETTING;
+   }
+}
+
+void
+sisDDInitStencilFuncs( GLcontext *ctx )
+{
+  ctx->Driver.StencilFunc = sisDDStencilFunc;
+  ctx->Driver.StencilMask = sisDDStencilMask;
+  ctx->Driver.StencilOp   = sisDDStencilOp;
+}