1 files changed, 135 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i915/intel_state.c b/src/mesa/drivers/dri/i915/intel_state.c
new file mode 100644
index 0000000000..23e49553ab
--- /dev/null
+++ b/src/mesa/drivers/dri/i915/intel_state.c
@@ -0,0 +1,135 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ **************************************************************************/
+
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "enums.h"
+#include "dd.h"
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "swrast/swrast.h"
+
+
+static void intelDrawBuffer(GLcontext *ctx, GLenum mode )
+{
+   intelContextPtr intel = INTEL_CONTEXT(ctx);
+   intelScreenPrivate *screen = intel->intelScreen;
+   int front = 0;
+ 
+   switch ( ctx->Color._DrawDestMask ) {
+   case DD_FRONT_LEFT_BIT:
+      front = 1;
+      FALLBACK( intel, INTEL_FALLBACK_DRAW_BUFFER, GL_FALSE );
+      break;
+   case DD_BACK_LEFT_BIT:
+      front = 0;
+      FALLBACK( intel, INTEL_FALLBACK_DRAW_BUFFER, GL_FALSE );
+      break;
+   default:
+      FALLBACK( intel, INTEL_FALLBACK_DRAW_BUFFER, GL_TRUE );
+      return;
+   }
+
+   /* We want to update the s/w rast state too so that r200SetBuffer()
+    * gets called.
+    */
+   _swrast_DrawBuffer(ctx, mode);
+
+   if ( intel->sarea->pf_current_page == 1 ) 
+      front ^= 1;
+   
+   intelSetFrontClipRects( intel );
+
+   if (front) {
+      intel->drawOffset = screen->frontOffset;
+      intel->drawMap = (char *)intel->driScreen->pFB;
+      intel->readMap = (char *)intel->driScreen->pFB;
+   } else {
+      intel->drawOffset = screen->backOffset;
+      intel->drawMap = screen->back.map;
+      intel->readMap = screen->back.map;
+   }
+
+   intel->vtbl.set_draw_offset( intel, intel->drawOffset );
+}
+
+static void intelReadBuffer( GLcontext *ctx, GLenum mode )
+{
+   /* nothing, until we implement h/w glRead/CopyPixels or CopyTexImage */
+}
+
+
+static void intelClearColor(GLcontext *ctx, const GLfloat color[4])
+{
+   intelContextPtr intel = INTEL_CONTEXT(ctx);
+   intelScreenPrivate *screen = intel->intelScreen;
+
+   CLAMPED_FLOAT_TO_UBYTE(intel->clear_red, color[0]);
+   CLAMPED_FLOAT_TO_UBYTE(intel->clear_green, color[1]);
+   CLAMPED_FLOAT_TO_UBYTE(intel->clear_blue, color[2]);
+   CLAMPED_FLOAT_TO_UBYTE(intel->clear_alpha, color[3]);
+
+   intel->ClearColor = INTEL_PACKCOLOR(screen->fbFormat,
+				       intel->clear_red, 
+				       intel->clear_green, 
+				       intel->clear_blue, 
+				       intel->clear_alpha);
+}
+
+
+static void intelCalcViewport( GLcontext *ctx )
+{
+   intelContextPtr intel = INTEL_CONTEXT(ctx);
+   const GLfloat *v = ctx->Viewport._WindowMap.m;
+   GLfloat *m = intel->ViewportMatrix.m;
+
+   /* See also intel_translate_vertex.  SUBPIXEL adjustments can be done
+    * via state vars, too.
+    */
+   m[MAT_SX] =   v[MAT_SX];
+   m[MAT_TX] =   v[MAT_TX] + SUBPIXEL_X;
+   m[MAT_SY] = - v[MAT_SY];
+   m[MAT_TY] = - v[MAT_TY] + intel->driDrawable->h + SUBPIXEL_Y;
+   m[MAT_SZ] =   v[MAT_SZ] * intel->depth_scale;
+   m[MAT_TZ] =   v[MAT_TZ] * intel->depth_scale;
+}
+
+static void intelViewport( GLcontext *ctx,
+			  GLint x, GLint y,
+			  GLsizei width, GLsizei height )
+{
+   intelCalcViewport( ctx );
+}
+
+static void intelDepthRange( GLcontext *ctx,
+			    GLclampd nearval, GLclampd farval )
+{
+   intelCalcViewport( ctx );
+}
+
+/* Fallback to swrast for select and feedback.
+ */
+static void intelRenderMode( GLcontext *ctx, GLenum mode )
+{
+   intelContextPtr intel = INTEL_CONTEXT(ctx);
+   FALLBACK( intel, INTEL_FALLBACK_RENDERMODE, (mode != GL_RENDER) );
+}
+
+
+void intelInitStateFuncs( struct dd_function_table *functions )
+{
+   functions->DrawBuffer = intelDrawBuffer;
+   functions->ReadBuffer = intelReadBuffer;
+   functions->RenderMode = intelRenderMode;
+   functions->Viewport = intelViewport;
+   functions->DepthRange = intelDepthRange;
+   functions->ClearColor = intelClearColor;
+}
+