mga driver, brought over by Jon Smirl

1 files changed, 171 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/mga/mgadd.c b/src/mesa/drivers/dri/mga/mgadd.c
new file mode 100644
index 0000000000..6ce50e6726
--- /dev/null
+++ b/src/mesa/drivers/dri/mga/mgadd.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2000-2001 VA Linux Systems, Inc.
+ * 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
+ * VA LINUX SYSTEMS AND/OR ITS 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.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+/* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgadd.c,v 1.14 2002/10/30 12:51:35 alanh Exp $ */
+
+
+#include "mtypes.h"
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mm.h"
+#include "mgacontext.h"
+#include "mgadd.h"
+#include "mgastate.h"
+#include "mgaspan.h"
+#include "mgatex.h"
+#include "mgatris.h"
+#include "mgavb.h"
+#include "mga_xmesa.h"
+#include "extensions.h"
+#if defined(USE_X86_ASM)
+#include "X86/common_x86_asm.h"
+#endif
+
+#define MGA_DATE	"20020221"
+
+
+/***************************************
+ * Mesa's Driver Functions
+ ***************************************/
+
+
+static const GLubyte *mgaDDGetString( GLcontext *ctx, GLenum name )
+{
+   mgaContextPtr mmesa = MGA_CONTEXT( ctx );
+   static char buffer[128];
+
+   switch ( name ) {
+   case GL_VENDOR:
+      return (GLubyte *) "VA Linux Systems Inc.";
+
+   case GL_RENDERER:
+      sprintf( buffer, "Mesa DRI %s " MGA_DATE,
+	       MGA_IS_G400(mmesa) ? "G400" :
+	       MGA_IS_G200(mmesa) ? "G200" : "MGA" );
+
+      /* Append any AGP-specific information.
+       */
+      switch ( mmesa->mgaScreen->agpMode ) {
+      case 1:
+	 strncat( buffer, " AGP 1x", 7 );
+	 break;
+      case 2:
+	 strncat( buffer, " AGP 2x", 7 );
+	 break;
+      case 4:
+	 strncat( buffer, " AGP 4x", 7 );
+	 break;
+      }
+
+      /* Append any CPU-specific information.
+       */
+#ifdef USE_X86_ASM
+      if ( _mesa_x86_cpu_features ) {
+	 strncat( buffer, " x86", 4 );
+      }
+#endif
+#ifdef USE_MMX_ASM
+      if ( cpu_has_mmx ) {
+	 strncat( buffer, "/MMX", 4 );
+      }
+#endif
+#ifdef USE_3DNOW_ASM
+      if ( cpu_has_3dnow ) {
+	 strncat( buffer, "/3DNow!", 7 );
+      }
+#endif
+#ifdef USE_SSE_ASM
+      if ( cpu_has_xmm ) {
+	 strncat( buffer, "/SSE", 4 );
+      }
+#endif
+      return (GLubyte *)buffer;
+
+   default:
+      return NULL;
+   }
+}
+
+
+
+static void mgaBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   mgaContextPtr mmesa = MGA_CONTEXT(ctx);
+
+   /* Need to lock to make sure the driDrawable is uptodate.  This
+    * information is used to resize Mesa's software buffers, so it has
+    * to be correct.
+    */
+   LOCK_HARDWARE( mmesa );
+   *width = mmesa->driDrawable->w;
+   *height = mmesa->driDrawable->h;
+   UNLOCK_HARDWARE( mmesa );
+}
+
+void mgaDDExtensionsInit( GLcontext *ctx )
+{
+   /* paletted_textures currently doesn't work, but we could fix them later */
+   /*
+   _mesa_enable_extension( ctx, "GL_EXT_shared_texture_palette" );
+   _mesa_enable_extension( ctx, "GL_EXT_paletted_texture" );
+   */
+
+   _mesa_enable_extension( ctx, "GL_ARB_texture_compression" );
+   _mesa_enable_extension( ctx, "GL_ARB_multisample" );
+
+   _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
+
+   /* Turn on multitexture and texenv_add for the G400.
+    */
+   if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
+      _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
+      _mesa_enable_extension( ctx, "GL_ARB_texture_env_add" );
+
+      _mesa_enable_extension( ctx, "GL_EXT_texture_env_add" );
+
+#if defined (MESA_packed_depth_stencil)
+      _mesa_enable_extension( ctx, "GL_MESA_packed_depth_stencil" );
+#endif
+
+#if defined (MESA_experimetal_agp_allocator)
+      if (!getenv("MGA_DISABLE_AGP_ALLOCATOR"))  
+	 _mesa_enable_extension( ctx, "GL_MESA_experimental_agp_allocator" );
+#endif
+   }
+}
+
+
+
+void mgaDDInitDriverFuncs( GLcontext *ctx )
+{
+   ctx->Driver.GetBufferSize = mgaBufferSize;
+   ctx->Driver.ResizeBuffers = _swrast_alloc_buffers;
+   ctx->Driver.GetString = mgaDDGetString;
+}