Fix the FFB driver for the renderbuffer changes

Support NEW INTERFACE as well

8 files changed, 316 insertions, 94 deletions

diff --git a/src/mesa/drivers/dri/ffb/ffb_depth.c b/src/mesa/drivers/dri/ffb/ffb_depth.c
index 27f3589d104..68a2450eb7d 100644
--- a/src/mesa/drivers/dri/ffb/ffb_depth.c
+++ b/src/mesa/drivers/dri/ffb/ffb_depth.c
@@ -37,10 +37,13 @@
 
 #undef DEPTH_TRACE
 
-static void 
-FFBWriteDepthSpan(GLcontext *ctx, GLuint n, GLint x, GLint y,
-		  const GLdepth depth[], const GLubyte mask[])
+static void FFBWriteDepthSpan( GLcontext *ctx,
+                                 struct gl_renderbuffer *rb,
+                                 GLuint n, GLint x, GLint y,
+				 const void *values,
+				 const GLubyte mask[] )
 {
+        const GLuint *depth = (const GLuint *) values;
 #ifdef DEPTH_TRACE
 	fprintf(stderr, "FFBWriteDepthSpan: n(%d) x(%d) y(%d)\n",
 		(int) n, x, y);
@@ -81,10 +84,28 @@ FFBWriteDepthSpan(GLcontext *ctx, GLuint n, GLint x, GLint y,
 	}
 }
 
-static void 
-FFBWriteDepthPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[],
-		    const GLdepth depth[], const GLubyte mask[])
+static void FFBWriteMonoDepthSpan( GLcontext *ctx, 
+				     struct gl_renderbuffer *rb,
+                         	     GLuint n, GLint x, GLint y,
+                         	     const void *value, const GLubyte mask[] )
 {
+	const GLuint depthVal = *((GLuint *) value);
+	GLuint depths[MAX_WIDTH];
+	GLuint i;
+	for (i = 0; i < n; i++)
+		depths[i] = depthVal;
+	FFBWriteDepthSpan(ctx, rb, n, x, y, depths, mask);
+}
+
+static void FFBWriteDepthPixels( GLcontext *ctx,
+                                   struct gl_renderbuffer *rb,
+				   GLuint n,
+				   const GLint x[],
+				   const GLint y[],
+				   const void *values,
+				   const GLubyte mask[] )
+{
+        const GLuint *depth = (const GLuint *) values;
 #ifdef DEPTH_TRACE
 	fprintf(stderr, "FFBWriteDepthPixels: n(%d)\n", (int) n);
 #endif
@@ -126,9 +147,12 @@ FFBWriteDepthPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[],
 	}
 }
 
-static void 
-FFBReadDepthSpan(GLcontext *ctx, GLuint n, GLint x, GLint y, GLdepth depth[])
+static void FFBReadDepthSpan( GLcontext *ctx,
+                                struct gl_renderbuffer *rb,
+				GLuint n, GLint x, GLint y,
+				void *values )
 {
+        GLuint *depth = (GLuint *) values;
 	ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 	__DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 	GLuint *zptr;
@@ -163,10 +187,13 @@ FFBReadDepthSpan(GLcontext *ctx, GLuint n, GLint x, GLint y, GLdepth depth[])
 		UNLOCK_HARDWARE(fmesa);
 }
 
-static void 
-FFBReadDepthPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[],
-		   GLdepth depth[])
+static void FFBReadDepthPixels( GLcontext *ctx,
+                                  struct gl_renderbuffer *rb,
+                                  GLuint n,
+				  const GLint x[], const GLint y[],
+				  void *values )
 {
+        GLuint *depth = (GLuint *) values;
 	ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 	__DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 	char *zbase;
@@ -202,13 +229,17 @@ FFBReadDepthPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[],
 		UNLOCK_HARDWARE(fmesa);
 }
 
-void ffbDDInitDepthFuncs(GLcontext *ctx)
+/**
+ * Plug in the Get/Put routines for the given driRenderbuffer.
+ */
+void
+ffbSetDepthFunctions(driRenderbuffer *drb, const GLvisual *vis)
 {
-	struct swrast_device_driver *swdd = 
-		_swrast_GetDeviceDriverReference(ctx);
-   
-	swdd->WriteDepthSpan	= FFBWriteDepthSpan;
-	swdd->ReadDepthSpan	= FFBReadDepthSpan;
-	swdd->WriteDepthPixels	= FFBWriteDepthPixels;
-	swdd->ReadDepthPixels	= FFBReadDepthPixels;
+	assert(drb->Base.InternalFormat == GL_DEPTH_COMPONENT16);
+      	drb->Base.GetRow        = FFBReadDepthSpan;
+      	drb->Base.GetValues     = FFBReadDepthPixels;
+      	drb->Base.PutRow        = FFBWriteDepthSpan;
+      	drb->Base.PutMonoRow    = FFBWriteMonoDepthSpan;
+      	drb->Base.PutValues     = FFBWriteDepthPixels;
+      	drb->Base.PutMonoValues = NULL;
 }
diff --git a/src/mesa/drivers/dri/ffb/ffb_depth.h b/src/mesa/drivers/dri/ffb/ffb_depth.h
index a098bfcc2a2..db908e7a635 100644
--- a/src/mesa/drivers/dri/ffb/ffb_depth.h
+++ b/src/mesa/drivers/dri/ffb/ffb_depth.h
@@ -3,6 +3,6 @@
 #ifndef _FFB_DEPTH_H
 #define _FFB_DEPTH_H
 
-extern void ffbDDInitDepthFuncs(GLcontext *ctx);
+void ffbSetDepthFunctions(driRenderbuffer *drb, const GLvisual *vis);
 
 #endif /* !(_FFB_DEPTH_H) */
diff --git a/src/mesa/drivers/dri/ffb/ffb_span.c b/src/mesa/drivers/dri/ffb/ffb_span.c
index 6927945226b..f4698c64e4a 100644
--- a/src/mesa/drivers/dri/ffb/ffb_span.c
+++ b/src/mesa/drivers/dri/ffb/ffb_span.c
@@ -116,27 +116,20 @@ do {	GLuint p = *(GLuint *)(buf + ((__x)<<2) + ((__y)<<13));	\
 
 #include <spantmp.h>
 
-void ffbDDInitSpanFuncs(GLcontext *ctx)
+/**
+ * Plug in the Get/Put routines for the given driRenderbuffer.
+ */
+void
+ffbSetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis)
 {
-	struct swrast_device_driver *swdd = 
-		_swrast_GetDeviceDriverReference(ctx);
-   
-	swdd->WriteRGBASpan	= ffbWriteRGBASpan_888;
-	swdd->WriteRGBSpan	= ffbWriteRGBSpan_888;
-	swdd->WriteRGBAPixels	= ffbWriteRGBAPixels_888;
-	swdd->WriteMonoRGBASpan	= ffbWriteMonoRGBASpan_888;
-	swdd->WriteMonoRGBAPixels	= ffbWriteMonoRGBAPixels_888;
-	swdd->ReadRGBASpan	= ffbReadRGBASpan_888;
-	swdd->ReadRGBAPixels	= ffbReadRGBAPixels_888;
-
-	/* We don't support color index mode yet, but it will be
-	 * very easy to do. -DaveM
-	 */
-	swdd->WriteCI8Span        = NULL;
-	swdd->WriteCI32Span       = NULL;
-	swdd->WriteMonoCISpan     = NULL;
-	swdd->WriteCI32Pixels     = NULL;
-	swdd->WriteMonoCIPixels   = NULL;
-	swdd->ReadCI32Span        = NULL;
-	swdd->ReadCI32Pixels      = NULL;
+	assert(vis->redBits == 8);
+        assert(vis->greenBits == 8);
+        assert(vis->blueBits == 8);
+        drb->Base.GetRow        = ffbReadRGBASpan_888;
+        drb->Base.GetValues     = ffbReadRGBAPixels_888;
+        drb->Base.PutRow        = ffbWriteRGBASpan_888;
+        drb->Base.PutRowRGB     = ffbWriteRGBSpan_888;
+        drb->Base.PutMonoRow    = ffbWriteMonoRGBASpan_888;
+        drb->Base.PutValues     = ffbWriteRGBAPixels_888;
+        drb->Base.PutMonoValues = ffbWriteMonoRGBAPixels_888;
 }
diff --git a/src/mesa/drivers/dri/ffb/ffb_span.h b/src/mesa/drivers/dri/ffb/ffb_span.h
index 00501e8230c..5ae227910d5 100644
--- a/src/mesa/drivers/dri/ffb/ffb_span.h
+++ b/src/mesa/drivers/dri/ffb/ffb_span.h
@@ -3,6 +3,8 @@
 #ifndef _FFB_SPAN_H
 #define _FFB_SPAN_H
 
-extern void ffbDDInitSpanFuncs(GLcontext *ctx);
+#include "drirenderbuffer.h"
+
+void ffbSetSpanFunctions(driRenderbuffer *drb, const GLvisual *vis);
 
 #endif /* !(_FFB_SPAN_H) */
diff --git a/src/mesa/drivers/dri/ffb/ffb_state.c b/src/mesa/drivers/dri/ffb/ffb_state.c
index 48b58e09932..86df5b4bcac 100644
--- a/src/mesa/drivers/dri/ffb/ffb_state.c
+++ b/src/mesa/drivers/dri/ffb/ffb_state.c
@@ -592,6 +592,8 @@ static void ffbDDColorMask(GLcontext *ctx,
 		new_pmask |= 0x0000ff00;
 	if (b)
 		new_pmask |= 0x00ff0000;
+	if (a)
+		new_pmask |= 0xff000000;
 
 	if (fmesa->pmask != new_pmask) {
 		fmesa->pmask = new_pmask;
diff --git a/src/mesa/drivers/dri/ffb/ffb_stencil.c b/src/mesa/drivers/dri/ffb/ffb_stencil.c
index a00eb3602ab..2f13ee9210b 100644
--- a/src/mesa/drivers/dri/ffb/ffb_stencil.c
+++ b/src/mesa/drivers/dri/ffb/ffb_stencil.c
@@ -36,10 +36,12 @@
 
 #undef STENCIL_TRACE
 
-static void 
-FFBWriteStencilSpan(GLcontext *ctx, GLuint n, GLint x, GLint y,
-		    const GLstencil stencil[], const GLubyte mask[])
+static void FFBWriteStencilSpan( GLcontext *ctx,
+                                   struct gl_renderbuffer *rb,
+				   GLuint n, GLint x, GLint y,
+				   const void *values, const GLubyte mask[] )
 {
+        const GLubyte *stencil = (const GLubyte *) values;
 #ifdef STENCIL_TRACE
 	fprintf(stderr, "FFBWriteStencilSpan: n(%d) x(%d) y(%d)\n",
 		(int) n, x, y);
@@ -79,10 +81,13 @@ FFBWriteStencilSpan(GLcontext *ctx, GLuint n, GLint x, GLint y,
 	}
 }
 
-static void 
-FFBWriteStencilPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[],
-		      const GLstencil stencil[], const GLubyte mask[])
+static void FFBWriteStencilPixels( GLcontext *ctx,
+                                     struct gl_renderbuffer *rb,
+				     GLuint n,
+				     const GLint x[], const GLint y[],
+				     const void *values, const GLubyte mask[] )
 {
+        const GLubyte *stencil = (const GLubyte *) values;
 #ifdef STENCIL_TRACE
 	fprintf(stderr, "FFBWriteStencilPixels: n(%d)\n", (int) n);
 #endif
@@ -124,9 +129,12 @@ FFBWriteStencilPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[]
 	}
 }
 
-static void 
-FFBReadStencilSpan(GLcontext *ctx, GLuint n, GLint x, GLint y, GLstencil stencil[])
+static void FFBReadStencilSpan( GLcontext *ctx,
+                                  struct gl_renderbuffer *rb,
+				  GLuint n, GLint x, GLint y,
+				  void *values)
 {
+        GLubyte *stencil = (GLubyte *) values;
 	ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 	__DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 	GLuint *zptr;
@@ -161,10 +169,12 @@ FFBReadStencilSpan(GLcontext *ctx, GLuint n, GLint x, GLint y, GLstencil stencil
 		UNLOCK_HARDWARE(fmesa);
 }
 
-static void 
-FFBReadStencilPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[],
-		     GLstencil stencil[])
+static void FFBReadStencilPixels( GLcontext *ctx,
+                                    struct gl_renderbuffer *rb,
+                                    GLuint n, const GLint x[], const GLint y[],
+				    void *values )
 {
+        GLubyte *stencil = (GLubyte *) values;
 	ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 	__DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 	char *zbase;
@@ -200,22 +210,17 @@ FFBReadStencilPixels(GLcontext *ctx, GLuint n, const GLint x[], const GLint y[],
 		UNLOCK_HARDWARE(fmesa);
 }
 
-void ffbDDInitStencilFuncs(GLcontext *ctx)
+/**
+ * Plug in the Get/Put routines for the given driRenderbuffer.
+ */
+void
+ffbSetStencilFunctions(driRenderbuffer *drb, const GLvisual *vis)
 {
-	ffbContextPtr fmesa = FFB_CONTEXT(ctx);
-
-	struct swrast_device_driver *swdd = 
-		_swrast_GetDeviceDriverReference(ctx);
-
-	if (fmesa->ffb_sarea->flags & FFB_DRI_FFB2PLUS) {
-		swdd->WriteStencilSpan	 = FFBWriteStencilSpan;
-		swdd->ReadStencilSpan	 = FFBReadStencilSpan;
-		swdd->WriteStencilPixels = FFBWriteStencilPixels;
-		swdd->ReadStencilPixels	 = FFBReadStencilPixels;
-	} else {
-		swdd->WriteStencilSpan	 = NULL;
-		swdd->ReadStencilSpan	 = NULL;
-		swdd->WriteStencilPixels = NULL;
-		swdd->ReadStencilPixels	 = NULL;
-	}
+	assert(drb->Base.InternalFormat == GL_STENCIL_INDEX8_EXT);
+      	drb->Base.GetRow        = FFBReadStencilSpan;
+      	drb->Base.GetValues     = FFBReadStencilPixels;
+      	drb->Base.PutRow        = FFBWriteStencilSpan;
+      	/*drb->Base.PutMonoRow    = FFBWriteMonoStencilSpan;*/
+      	drb->Base.PutValues     = FFBWriteStencilPixels;
+      	drb->Base.PutMonoValues = NULL;
 }
diff --git a/src/mesa/drivers/dri/ffb/ffb_stencil.h b/src/mesa/drivers/dri/ffb/ffb_stencil.h
index af161e7c1d1..c7da1ca681f 100644
--- a/src/mesa/drivers/dri/ffb/ffb_stencil.h
+++ b/src/mesa/drivers/dri/ffb/ffb_stencil.h
@@ -3,6 +3,6 @@
 #ifndef _FFB_STENCIL_H
 #define _FFB_STENCIL_H
 
-extern void ffbDDInitStencilFuncs(GLcontext *ctx);
+void ffbSetStencilFunctions(driRenderbuffer *drb, const GLvisual *vis);
 
 #endif /* !(_FFB_STENCIL_H) */
diff --git a/src/mesa/drivers/dri/ffb/ffb_xmesa.c b/src/mesa/drivers/dri/ffb/ffb_xmesa.c
index cdaafac15fb..aced4a9253d 100644
--- a/src/mesa/drivers/dri/ffb/ffb_xmesa.c
+++ b/src/mesa/drivers/dri/ffb/ffb_xmesa.c
@@ -27,9 +27,12 @@
 
 #include "ffb_xmesa.h"
 #include "context.h"
+#include "framebuffer.h"
 #include "matrix.h"
+#include "renderbuffer.h"
 #include "simple_list.h"
 #include "imports.h"
+#include "utils.h"
 
 #include "swrast/swrast.h"
 #include "swrast_setup/swrast_setup.h"
@@ -276,9 +279,6 @@ ffbCreateContext(const __GLcontextModes *mesaVis,
 	ffbDDExtensionsInit(ctx);
 	ffbDDInitDriverFuncs(ctx);
 	ffbDDInitStateFuncs(ctx);
-	ffbDDInitSpanFuncs(ctx);
-	ffbDDInitDepthFuncs(ctx);
-	ffbDDInitStencilFuncs(ctx);
 	ffbDDInitRenderFuncs(ctx);
 	/*ffbDDInitTexFuncs(ctx); not needed */
 	ffbDDInitBitmapFuncs(ctx);
@@ -322,16 +322,63 @@ ffbCreateBuffer(__DRIscreenPrivate *driScrnPriv,
                 const __GLcontextModes *mesaVis,
                 GLboolean isPixmap )
 {
+   /* Mesa checks for pitch > 0, but ffb doesn't use pitches */
+   int bogusPitch = 1;
+   int bpp = 4; /* we've always got a 32bpp framebuffer */
+   int offset = 0; /* always at 0 for offset */
+
    if (isPixmap) {
       return GL_FALSE; /* not implemented */
-   }
-   else {
+   } else {
+      GLboolean swStencil = (mesaVis->stencilBits > 0 && 
+			     mesaVis->depthBits != 24);
+#if 0
       driDrawPriv->driverPrivate = (void *) 
-         _mesa_create_framebuffer(mesaVis,
-                                  GL_FALSE,  /* software depth buffer? */
+	 _mesa_create_framebuffer(mesaVis,
+				  GL_FALSE,  /* software depth buffer? */
                                   mesaVis->stencilBits > 0,
                                   mesaVis->accumRedBits > 0,
                                   mesaVis->alphaBits > 0);
+#else
+      struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
+
+      {
+         driRenderbuffer *frontRb
+            = driNewRenderbuffer(GL_RGBA, bpp, offset, bogusPitch);
+         ffbSetSpanFunctions(frontRb, mesaVis);
+         _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
+      }
+
+      if (mesaVis->doubleBufferMode) {
+         driRenderbuffer *backRb
+            = driNewRenderbuffer(GL_RGBA, bpp, offset, bogusPitch);
+         ffbSetSpanFunctions(backRb, mesaVis);
+         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
+      }
+
+      if (mesaVis->depthBits == 16) {
+         driRenderbuffer *depthRb
+            = driNewRenderbuffer(GL_DEPTH_COMPONENT16, bpp, offset, bogusPitch);
+         ffbSetDepthFunctions(depthRb, mesaVis);
+         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
+      }
+
+      if (mesaVis->stencilBits > 0 && !swStencil) {
+         driRenderbuffer *stencilRb
+            = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT, bpp, offset,bogusPitch);
+         ffbSetStencilFunctions(stencilRb, mesaVis);
+         _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
+      }
+
+      _mesa_add_soft_renderbuffers(fb,
+                                   GL_FALSE, /* color */
+                                   GL_FALSE, /* depth */
+                                   swStencil,
+                                   mesaVis->accumRedBits > 0,
+                                   GL_FALSE, /* alpha */
+                                   GL_FALSE /* aux */);
+      driDrawPriv->driverPrivate = (void *) fb;
+#endif
       return (driDrawPriv->driverPrivate != NULL);
    }
 }
@@ -488,7 +535,7 @@ ffbMakeCurrent(__DRIcontextPrivate *driContextPriv,
 
 		fmesa->driDrawable = driDrawPriv;
 
-		_mesa_make_current2(fmesa->glCtx, 
+		_mesa_make_current(fmesa->glCtx, 
 			    (GLframebuffer *) driDrawPriv->driverPrivate, 
 			    (GLframebuffer *) driReadPriv->driverPrivate);
 
@@ -520,7 +567,7 @@ ffbMakeCurrent(__DRIcontextPrivate *driContextPriv,
 				   1, 0, 0, 0, 0);
 		}
 	} else {
-		_mesa_make_current(NULL, NULL);
+		_mesa_make_current(NULL, NULL, NULL);
 	}
 
 	return GL_TRUE;
@@ -551,30 +598,172 @@ void ffbXMesaUpdateState(ffbContextPtr fmesa)
 	}
 }
 
-
-static struct __DriverAPIRec ffbAPI = {
-   ffbInitDriver,
-   ffbDestroyScreen,
-   ffbCreateContext,
-   ffbDestroyContext,
-   ffbCreateBuffer,
-   ffbDestroyBuffer,
-   ffbSwapBuffers,
-   ffbMakeCurrent,
-   ffbUnbindContext
+static const struct __DriverAPIRec ffbAPI = {
+   .InitDriver      = ffbInitDriver,
+   .DestroyScreen   = ffbDestroyScreen,
+   .CreateContext   = ffbCreateContext,
+   .DestroyContext  = ffbDestroyContext,
+   .CreateBuffer    = ffbCreateBuffer,
+   .DestroyBuffer   = ffbDestroyBuffer,
+   .SwapBuffers     = ffbSwapBuffers,
+   .MakeCurrent     = ffbMakeCurrent,
+   .UnbindContext   = ffbUnbindContext,
+   .GetSwapInfo     = NULL,
+   .GetMSC          = NULL,
+   .WaitForMSC      = NULL,
+   .WaitForSBC      = NULL,
+   .SwapBuffersMSC  = NULL
 };
 
 
-
 /*
  * This is the bootstrap function for the driver.
  * The __driCreateScreen name is the symbol that libGL.so fetches.
  * Return:  pointer to a __DRIscreenPrivate.
  */
+#if !defined(DRI_NEW_INTERFACE_ONLY)
 void *__driCreateScreen(Display *dpy, int scrn, __DRIscreen *psc,
-                        int numConfigs, __GLXvisualConfig *config)
+			int numConfigs, __GLXvisualConfig *config)
 {
    __DRIscreenPrivate *psp;
    psp = __driUtilCreateScreen(dpy, scrn, psc, numConfigs, config, &ffbAPI);
    return (void *) psp;
 }
+#endif /* !defined(DRI_NEW_INTERFACE_ONLY) */
+	     
+
+#ifdef USE_NEW_INTERFACE
+static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
+
+static __GLcontextModes *
+ffbFillInModes( unsigned pixel_bits, unsigned depth_bits,
+		 unsigned stencil_bits, GLboolean have_back_buffer )
+{
+   __GLcontextModes * modes;
+   __GLcontextModes * m;
+   unsigned num_modes;
+   unsigned depth_buffer_factor;
+   unsigned back_buffer_factor;
+   GLenum fb_format;
+   GLenum fb_type;
+
+   /* GLX_SWAP_COPY_OML is only supported because the FFB driver doesn't
+    * support pageflipping at all.
+    */
+   static const GLenum back_buffer_modes[] = {
+      GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
+   };
+
+   u_int8_t depth_bits_array[3];
+   u_int8_t stencil_bits_array[3];
+
+
+   depth_bits_array[0] = 0;
+   depth_bits_array[1] = depth_bits;
+   depth_bits_array[2] = depth_bits;
+
+   /* Just like with the accumulation buffer, always provide some modes
+    * with a stencil buffer.  It will be a sw fallback, but some apps won't
+    * care about that.
+    */
+   stencil_bits_array[0] = 0;
+   stencil_bits_array[1] = 0;
+   stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
+
+   depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
+   back_buffer_factor  = (have_back_buffer) ? 3 : 1;
+
+   num_modes = depth_buffer_factor * back_buffer_factor * 4;
+
+    if ( pixel_bits == 16 ) {
+        fb_format = GL_RGB;
+        fb_type = GL_UNSIGNED_SHORT_5_6_5;
+    }
+    else {
+        fb_format = GL_BGRA;
+        fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
+    }
+
+   modes = (*create_context_modes)( num_modes, sizeof( __GLcontextModes ) );
+   m = modes;
+   if ( ! driFillInModes( & m, fb_format, fb_type,
+			  depth_bits_array, stencil_bits_array, depth_buffer_factor,
+			  back_buffer_modes, back_buffer_factor,
+			  GLX_TRUE_COLOR ) ) {
+	fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
+		 __func__, __LINE__ );
+	return NULL;
+   }
+   if ( ! driFillInModes( & m, fb_format, fb_type,
+			  depth_bits_array, stencil_bits_array, depth_buffer_factor,
+			  back_buffer_modes, back_buffer_factor,
+			  GLX_DIRECT_COLOR ) ) {
+	fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
+		 __func__, __LINE__ );
+	return NULL;
+   }
+
+
+   /* Mark the visual as slow if there are "fake" stencil bits.
+    */
+   for ( m = modes ; m != NULL ; m = m->next ) {
+      if ( (m->stencilBits != 0) && (m->stencilBits != stencil_bits) ) {
+	 m->visualRating = GLX_SLOW_CONFIG;
+      }
+   }
+
+   return modes;
+}
+#endif /* USE_NEW_INTERFACE */
+
+
+/**
+ * This is the bootstrap function for the driver.  libGL supplies all of the
+ * requisite information about the system, and the driver initializes itself.
+ * This routine also fills in the linked list pointed to by \c driver_modes
+ * with the \c __GLcontextModes that the driver can support for windows or
+ * pbuffers.
+ * 
+ * \return A pointer to a \c __DRIscreenPrivate on success, or \c NULL on 
+ *         failure.
+ */
+#ifdef USE_NEW_INTERFACE
+PUBLIC
+void * __driCreateNewScreen( __DRInativeDisplay *dpy, int scrn, __DRIscreen *psc,
+			     const __GLcontextModes * modes,
+			     const __DRIversion * ddx_version,
+			     const __DRIversion * dri_version,
+			     const __DRIversion * drm_version,
+			     const __DRIframebuffer * frame_buffer,
+			     drmAddress pSAREA, int fd, 
+			     int internal_api_version,
+			     __GLcontextModes ** driver_modes )
+			     
+{
+   __DRIscreenPrivate *psp;
+   static const __DRIversion ddx_expected = { 0, 0, 1 };
+   static const __DRIversion dri_expected = { 4, 0, 0 };
+   static const __DRIversion drm_expected = { 0, 0, 1 };
+
+   if ( ! driCheckDriDdxDrmVersions2( "ffb",
+				      dri_version, & dri_expected,
+				      ddx_version, & ddx_expected,
+				      drm_version, & drm_expected ) ) {
+      return NULL;
+   }
+
+   psp = __driUtilCreateNewScreen(dpy, scrn, psc, NULL,
+				  ddx_version, dri_version, drm_version,
+				  frame_buffer, pSAREA, fd,
+				  internal_api_version, &ffbAPI);
+   if ( psp != NULL ) {
+      create_context_modes = (PFNGLXCREATECONTEXTMODES)
+	  glXGetProcAddress( (const GLubyte *) "__glXCreateContextModes" );
+      if ( create_context_modes != NULL ) {
+	 *driver_modes = ffbFillInModes( 32, 16, 0, GL_TRUE );
+      }
+   }
+
+   return (void *) psp;
+}
+#endif /* USE_NEW_INTERFACE */