add the SiS driver - no kernel driver yet

(build tested, but not physically tested)

1 files changed, 177 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/sis/sis_dd.c b/src/mesa/drivers/dri/sis/sis_dd.c
new file mode 100644
index 0000000000..9dc3688b07
--- /dev/null
+++ b/src/mesa/drivers/dri/sis/sis_dd.c
@@ -0,0 +1,177 @@
+/**************************************************************************
+
+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_ctx.c,v 1.3 2000/09/26 15:56:48 tsi Exp $ */
+
+/*
+ * Authors:
+ *    Sung-Ching Lin <sclin@sis.com.tw>
+ *    Eric Anholt <anholt@FreeBSD.org>
+ *
+ */
+
+#include "sis_context.h"
+#include "sis_dd.h"
+#include "sis_lock.h"
+#include "sis_alloc.h"
+#include "sis_state.h"
+
+#include "swrast/swrast.h"
+
+#include "utils.h"
+
+#define DRIVER_DATE	"20030810"
+
+/* Return the width and height of the given buffer.
+ */
+static void
+sisDDGetBufferSize( GLframebuffer *buffer,
+			      GLuint *width, GLuint *height )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   LOCK_HARDWARE();
+   *width  = smesa->driDrawable->w;
+   *height = smesa->driDrawable->h;
+   UNLOCK_HARDWARE();
+}
+
+/* Return various strings for glGetString().
+ */
+static const GLubyte *
+sisDDGetString( GLcontext *ctx, GLenum name )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+   static char buffer[128];
+   unsigned   offset;
+   GLuint agp_mode = (smesa->AGPSize > 0);
+
+   switch ( name )
+   {
+   case GL_VENDOR:
+      return (GLubyte *)"Eric Anholt";
+
+   case GL_RENDERER:
+      offset = driGetRendererString( buffer, "SiS", DRIVER_DATE, agp_mode );
+
+      return (GLubyte *)buffer;
+
+   default:
+      return NULL;
+   }
+}
+
+/* Send all commands to the hardware.  No-op, due to mmio.
+ */
+static void
+sisDDFlush( GLcontext *ctx )
+{
+   /* Do nothing */
+}
+
+/* Make sure all commands have been sent to the hardware and have
+ * completed processing.
+ */
+static void
+sisDDFinish( GLcontext *ctx )
+{
+   sisContextPtr smesa = SIS_CONTEXT(ctx);
+
+   sisDDFlush( ctx );
+   WaitEngIdle( smesa );
+}
+
+void
+sisUpdateBufferSize( sisContextPtr smesa )
+{
+   __GLSiSHardware *current = &smesa->current;
+   __GLSiSHardware *prev = &smesa->prev;
+   GLuint z_depth;
+
+   /* XXX Should get the base offset of the frontbuffer from the X Server */
+   smesa->frontOffset = smesa->driDrawable->x * smesa->bytesPerPixel +
+			smesa->driDrawable->y * smesa->frontPitch;
+
+   if ( smesa->width == smesa->driDrawable->w &&
+      smesa->height == smesa->driDrawable->h )
+   {
+      return;
+   }
+
+   smesa->width = smesa->driDrawable->w;
+   smesa->height = smesa->driDrawable->h;
+   smesa->bottom = smesa->height - 1;
+
+   if ( smesa->backbuffer )
+      sisFreeBackbuffer( smesa );
+   if ( smesa->depthbuffer )
+      sisFreeZStencilBuffer( smesa );
+	
+   if ( smesa->glCtx->Visual.depthBits > 0 )
+      sisAllocZStencilBuffer( smesa );
+   if ( smesa->glCtx->Visual.doubleBufferMode )
+      sisAllocBackbuffer( smesa );
+
+   switch (smesa->zFormat)
+   {
+   case SiS_ZFORMAT_Z16:
+      z_depth = 2;
+      break;
+   case SiS_ZFORMAT_Z32:
+   case SiS_ZFORMAT_S8Z24:
+      z_depth = 4;
+      break;
+   default:
+      assert( 0 );
+   }
+
+   current->hwZ &= ~MASK_ZBufferPitch;
+   current->hwZ |= smesa->width * z_depth >> 2;
+   current->hwOffsetZ = ( (GLint)smesa->depthbuffer -
+			  (GLint)GET_FbBase(smesa) ) >> 2;
+
+   if ((current->hwOffsetZ != prev->hwOffsetZ) || (current->hwZ != prev->hwZ)) {
+      prev->hwOffsetZ = current->hwOffsetZ;
+      prev->hwZ = current->hwZ;
+      smesa->GlobalFlag |= GFLAG_ZSETTING;
+   }
+  
+   sisUpdateClipping( smesa->glCtx );
+}
+
+/* Initialize the driver's misc functions.
+ */
+void
+sisDDInitDriverFuncs( GLcontext *ctx )
+{
+   ctx->Driver.GetBufferSize	= sisDDGetBufferSize;
+   ctx->Driver.ResizeBuffers    = _swrast_alloc_buffers;
+   ctx->Driver.GetString	= sisDDGetString;
+   ctx->Driver.Finish		= sisDDFinish;
+   ctx->Driver.Flush		= sisDDFlush;
+   ctx->Driver.Error		= NULL;
+}