DirectFB driver (Claudio Ciccani)

1 files changed, 642 insertions, 0 deletions

diff --git a/src/mesa/drivers/directfb/idirectfbgl_mesa.c b/src/mesa/drivers/directfb/idirectfbgl_mesa.c
new file mode 100644
index 00000000000..c438b86421a
--- /dev/null
+++ b/src/mesa/drivers/directfb/idirectfbgl_mesa.c
@@ -0,0 +1,642 @@
+/*
+ * Copyright (C) 2004 Claudio Ciccani <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * 
+ * Based on glfbdev.c, written by Brian Paul.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <directfb.h>
+
+#include <direct/messages.h>
+#include <direct/interface.h>
+#include <direct/mem.h>
+
+#ifdef CLAMP
+# undef CLAMP
+#endif 
+
+#include "GL/directfbgl.h"
+#include "glheader.h"
+#include "buffers.h"
+#include "context.h"
+#include "extensions.h"
+#include "imports.h"
+#include "texformat.h"
+#include "teximage.h"
+#include "texstore.h"
+#include "array_cache/acache.h"
+#include "swrast/swrast.h"
+#include "swrast_setup/swrast_setup.h"
+#include "tnl/tnl.h"
+#include "tnl/t_context.h"
+#include "tnl/t_pipeline.h"
+#include "drivers/common/driverfuncs.h"
+
+
+static DFBResult
+Probe( void *data );
+
+static DFBResult
+Construct( IDirectFBGL      *thiz,
+           IDirectFBSurface *surface );
+
+#include <direct/interface_implementation.h>
+
+DIRECT_INTERFACE_IMPLEMENTATION( IDirectFBGL, Mesa )
+
+/*
+ * private data struct of IDirectFBGL
+ */
+typedef struct {
+     int                     ref;       /* reference counter */
+     
+     bool                    locked;
+     
+     IDirectFBSurface       *surface;
+     DFBSurfacePixelFormat   format;
+     int                     width;
+     int                     height;
+     
+     struct {
+          __u8              *start;
+          __u8              *end;
+          int                pitch;
+     } video;
+
+     GLvisual                visual;
+     GLframebuffer           framebuffer;
+     GLcontext               context;
+} IDirectFBGL_data;
+
+
+static bool  dfb_mesa_setup_visual   ( GLvisual              *visual,
+                                       DFBSurfacePixelFormat  format );
+static bool  dfb_mesa_create_context ( GLcontext             *context,
+                                       GLframebuffer         *framebuffer,
+                                       GLvisual              *visual,
+                                       DFBSurfacePixelFormat  format,
+                                       void                  *data );
+static void  dfb_mesa_destroy_context( GLcontext             *context,
+                                       GLframebuffer         *framebuffer );
+
+
+static void
+IDirectFBGL_Destruct( IDirectFBGL *thiz )
+{
+     IDirectFBGL_data *data = (IDirectFBGL_data*) thiz->priv;
+
+     dfb_mesa_destroy_context( &data->context, &data->framebuffer );
+     
+     data->surface->Release( data->surface );
+
+     DIRECT_DEALLOCATE_INTERFACE( thiz );
+}
+
+static DFBResult
+IDirectFBGL_AddRef( IDirectFBGL *thiz )
+{
+     DIRECT_INTERFACE_GET_DATA( IDirectFBGL );
+
+     data->ref++;
+
+     return DFB_OK;
+}
+
+static DFBResult
+IDirectFBGL_Release( IDirectFBGL *thiz )
+{
+     DIRECT_INTERFACE_GET_DATA( IDirectFBGL )
+
+     if (--data->ref == 0) {
+          IDirectFBGL_Destruct( thiz );
+     }
+
+     return DFB_OK;
+}
+
+static DFBResult
+IDirectFBGL_Lock( IDirectFBGL *thiz )
+{
+     IDirectFBSurface *surface;
+     int               width   = 0;
+     int               height  = 0;
+     DFBResult         err;
+     
+     DIRECT_INTERFACE_GET_DATA( IDirectFBGL );
+
+     if (data->locked)
+          return DFB_LOCKED;
+
+     surface = data->surface;
+     surface->GetSize( surface, &width, &height );
+     
+     err = surface->Lock( surface, DSLF_READ | DSLF_WRITE, 
+                          (void**) &data->video.start, &data->video.pitch );
+     if (err != DFB_OK) {
+          D_ERROR( "DirectFBGL/Mesa: couldn't lock surface.\n" );
+          return err;
+     }
+     data->video.end = data->video.start + (height-1) * data->video.pitch;
+     
+     if (data->width != width || data->height != height) {
+          data->width  = width;
+          data->height = height;
+          _mesa_ResizeBuffersMESA();
+     }
+     
+     data->locked = true;
+     
+     return DFB_OK;
+}
+
+static DFBResult
+IDirectFBGL_Unlock( IDirectFBGL *thiz )
+{     
+     DIRECT_INTERFACE_GET_DATA( IDirectFBGL );
+
+     if (!data->locked)
+          return DFB_OK;
+
+     data->surface->Unlock( data->surface );
+     data->video.start = NULL;
+     data->video.end   = NULL;
+    
+     data->locked = false;
+
+     return DFB_OK;
+}
+
+static DFBResult
+IDirectFBGL_GetAttributes( IDirectFBGL     *thiz,
+                           DFBGLAttributes *attributes )
+{
+     GLvisual *visual;
+     
+     DIRECT_INTERFACE_GET_DATA( IDirectFBGL );
+
+     if (!attributes)
+          return DFB_INVARG;
+
+     visual = &data->visual;
+     
+     attributes->buffer_size      = visual->rgbBits ? : visual->indexBits;
+     attributes->depth_size       = visual->depthBits;
+     attributes->stencil_size     = visual->stencilBits;
+     attributes->aux_buffers      = visual->numAuxBuffers;
+     attributes->red_size         = visual->redBits;
+     attributes->green_size       = visual->greenBits;
+     attributes->blue_size        = visual->blueBits;
+     attributes->alpha_size       = visual->alphaBits;
+     attributes->accum_red_size   = visual->accumRedBits;
+     attributes->accum_green_size = visual->accumGreenBits;
+     attributes->accum_blue_size  = visual->accumBlueBits;
+     attributes->accum_alpha_size = visual->accumAlphaBits;
+     attributes->double_buffer    = (visual->doubleBufferMode != 0);
+     attributes->stereo           = (visual->stereoMode != 0);
+
+     return DFB_OK;
+}
+
+
+/* exported symbols */
+
+static DFBResult
+Probe( void *data )
+{
+     return DFB_OK;
+}
+
+static DFBResult
+Construct( IDirectFBGL      *thiz,
+           IDirectFBSurface *surface )
+{ 
+     /* Allocate interface data. */
+     DIRECT_ALLOCATE_INTERFACE_DATA( thiz, IDirectFBGL );
+
+     /* Initialize interface data. */
+     data->ref     = 1;
+     data->surface = surface;
+
+     surface->AddRef( surface );
+     surface->GetPixelFormat( surface, &data->format );
+     surface->GetSize( surface, &data->width, &data->height );
+
+     /* Configure visual. */
+     if (!dfb_mesa_setup_visual( &data->visual, data->format )) {
+          D_ERROR( "DirectFBGL/Mesa: failed to initialize visual.\n" );
+          surface->Release( surface );
+          return DFB_UNSUPPORTED;
+     }
+     
+     /* Create context. */
+     if (!dfb_mesa_create_context( &data->context, &data->framebuffer,
+                                   &data->visual, data->format, (void*) data )) {
+          D_ERROR( "DirectFBGL/Mesa: failed to create context.\n" );
+          surface->Release( surface );
+          return DFB_UNSUPPORTED;
+     }
+
+     /* Assign interface pointers. */
+     thiz->AddRef        = IDirectFBGL_AddRef;
+     thiz->Release       = IDirectFBGL_Release;
+     thiz->Lock          = IDirectFBGL_Lock;
+     thiz->Unlock        = IDirectFBGL_Unlock;
+     thiz->GetAttributes = IDirectFBGL_GetAttributes;
+
+     return DFB_OK;
+}
+
+
+/* internal functions */
+
+static const GLubyte*
+get_string( GLcontext *ctx, GLenum pname )
+{
+     switch (pname) {
+          case GL_VENDOR:
+               return "Claudio Ciccani";
+          case GL_VERSION:
+               return "1.0";
+          default:
+               return NULL;
+     }
+}
+
+static void
+update_state( GLcontext *ctx, GLuint new_state )
+{
+     _swrast_InvalidateState( ctx, new_state );
+     _swsetup_InvalidateState( ctx, new_state );
+     _ac_InvalidateState( ctx, new_state );
+     _tnl_InvalidateState( ctx, new_state );
+}
+
+static void
+get_buffer_size( GLframebuffer *buffer, GLuint *width, GLuint *height )
+{
+     GLcontext        *ctx  = _mesa_get_current_context();
+     IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
+
+     *width  = (GLuint) data->width;
+     *height = (GLuint) data->height;
+}
+
+static void
+set_viewport( GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h )
+{
+     _mesa_ResizeBuffersMESA();
+}
+
+/* required but not used */
+static void
+set_buffer( GLcontext *ctx, GLframebuffer *buffer, GLuint bufferBit )
+{
+     return;
+}
+
+
+/* RGB332 */
+#define NAME(PREFIX) PREFIX##_RGB332
+#define SPAN_VARS \
+   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = data->video.end - (Y) * data->video.pitch + (X)
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
+   *P = ( (((R) & 0xe0)) | (((G) & 0xe0) >> 3) | ((B) >> 6) )
+#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
+   *P = ( (((R) & 0xe0)) | (((G) & 0xe0) >> 3) | ((B) >> 6) )
+#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
+   R = ((*P & 0xe0)     ); \
+   G = ((*P & 0x1c) << 3); \
+   B = ((*P & 0x03) << 6); \
+   A = CHAN_MAX
+
+#include "swrast/s_spantemp.h"
+
+/* ARGB1555 */
+#define NAME(PREFIX) PREFIX##_ARGB1555
+#define SPAN_VARS \
+   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLushort *P = (GLushort *) (data->video.end - (Y) * data->video.pitch + (X) * 2)
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
+   *P = ( (((R) & 0xf8) << 7) | (((G) & 0xf8) << 2) | ((B) >> 3) )
+#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
+   *P = ( (((A) & 0x80) << 8) | (((R) & 0xf8) << 7) | (((G) & 0xf8) << 2) | ((B) >> 3) )
+#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
+   R = ((*P & 0x7c00) >> 7); \
+   G = ((*P & 0x03e0) >> 2); \
+   B = ((*P & 0x001f) << 3); \
+   A = ((*P & 0x8000) ? 0xff : 0)
+
+#include "swrast/s_spantemp.h"
+
+/* RGB16 */
+#define NAME(PREFIX) PREFIX##_RGB16
+#define SPAN_VARS \
+   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLushort *P = (GLushort *) (data->video.end - (Y) * data->video.pitch + (X) * 2)
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
+   *P = ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
+#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
+   *P = ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
+#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
+   R = ((*P & 0xf800) >> 8); \
+   G = ((*P & 0x07e0) >> 3); \
+   B = ((*P & 0x001f) << 3); \
+   A = CHAN_MAX
+
+#include "swrast/s_spantemp.h"
+
+/* RGB24 */
+#define NAME(PREFIX) PREFIX##_RGB24
+#define SPAN_VARS \
+   IDirectFBGL_data *data = ctx->DriverCtx;
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = data->video.end - (Y) * data->video.pitch + (X) * 3
+#define INC_PIXEL_PTR(P) P += 3
+#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
+   P[0] = B;  P[1] = G;  P[2] = R
+#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
+   P[0] = B;  P[1] = G;  P[2] = R
+#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
+   R = P[2];  G = P[1];  B = P[0];  A = CHAN_MAX
+
+#include "swrast/s_spantemp.h"
+
+/* RGB32 */
+#define NAME(PREFIX) PREFIX##_RGB32
+#define SPAN_VARS \
+   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLuint *P = (GLuint*) (data->video.end - (Y) * data->video.pitch + (X) * 4)
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
+   *P = ( ((R) << 16) | ((G) << 8) | (B) )
+#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
+   *P = ( ((R) << 16) | ((G) << 8) | (B) )
+#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
+   R = ((*P & 0x00ff0000) >> 16); \
+   G = ((*P & 0x0000ff00) >>  8); \
+   B = ((*P & 0x000000ff)      ); \
+   A = CHAN_MAX
+
+#include "swrast/s_spantemp.h"
+   
+/* ARGB */
+#define NAME(PREFIX) PREFIX##_ARGB
+#define SPAN_VARS \
+   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLuint *P = (GLuint*) (data->video.end - (Y) * data->video.pitch + (X) * 4)
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
+   *P = ( 0xff000000  | ((R) << 16) | ((G) << 8) | (B) )
+#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
+   *P = ( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
+#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
+   R = ((*P & 0x00ff0000) >> 16); \
+   G = ((*P & 0x0000ff00) >>  8); \
+   B = ((*P & 0x000000ff)      ); \
+   A = ((*P & 0xff000000) >> 24)
+
+#include "swrast/s_spantemp.h"
+
+/* AiRGB */
+#define NAME(PREFIX) PREFIX##_AiRGB
+#define SPAN_VARS \
+   IDirectFBGL_data *data = (IDirectFBGL_data*) ctx->DriverCtx;
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLuint *P = (GLuint*) (data->video.end - (Y) * data->video.pitch + (X) * 4)
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
+   *P = ( ((R) << 16) | ((G) << 8) | (B) )
+#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
+   *P = ( ((0xff - (A)) << 24) | ((R) << 16) | ((G) << 8) | (B) )
+#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
+   R =         ((*P & 0x00ff0000) >> 16); \
+   G =         ((*P & 0x0000ff00) >>  8); \
+   B =         ((*P & 0x000000ff)      ); \
+   A = (0xff - ((*P & 0xff000000) >> 24))
+
+#include "swrast/s_spantemp.h"
+
+
+static bool
+dfb_mesa_setup_visual( GLvisual              *visual,
+                       DFBSurfacePixelFormat  format )
+{
+     GLboolean  rgbFlag        = GL_TRUE;
+     GLboolean  dbFlag         = GL_FALSE;
+     GLboolean  stereoFlag     = GL_FALSE;
+     GLint      redBits        = 0;
+     GLint      blueBits       = 0;
+     GLint      greenBits      = 0;
+     GLint      alphaBits      = 0;
+     GLint      indexBits      = 0;
+     GLint      depthBits      = 0;
+     GLint      stencilBits    = 0;
+     GLint      accumRedBits   = 0;
+     GLint      accumGreenBits = 0;
+     GLint      accumBlueBits  = 0;
+     GLint      accumAlphaBits = 0;
+     GLint      numSamples     = 0;
+
+     /* FIXME: LUT8 support. */
+     switch (format) {
+          case DSPF_RGB332:
+               redBits   = 3;
+               greenBits = 3;
+               blueBits  = 2;
+               break;
+          case DSPF_ARGB1555:
+               redBits   = 5;
+               greenBits = 5;
+               blueBits  = 5;
+               alphaBits = 1;
+               break;
+          case DSPF_RGB16:
+               redBits   = 5;
+               greenBits = 6;
+               blueBits  = 5;
+               break;
+          case DSPF_ARGB:
+          case DSPF_AiRGB:
+               alphaBits = 8;
+          case DSPF_RGB24:
+          case DSPF_RGB32:
+               redBits   = 8;
+               greenBits = 8;
+               blueBits  = 8;
+               break;
+          default:
+               D_WARN( "unsupported pixelformat" );
+               return false;
+     }
+
+     if (rgbFlag) {
+          accumRedBits   = redBits;
+          accumGreenBits = greenBits;
+          accumBlueBits  = blueBits;
+          accumAlphaBits = alphaBits;
+          depthBits      = redBits + greenBits + blueBits;
+          stencilBits    = alphaBits;
+     } else
+          depthBits      = 8;
+
+     return _mesa_initialize_visual( visual,
+                                     rgbFlag, dbFlag, stereoFlag,
+                                     redBits, greenBits, blueBits, alphaBits,
+                                     indexBits, depthBits, stencilBits,
+                                     accumRedBits, accumGreenBits,
+                                     accumBlueBits, accumAlphaBits,
+                                     numSamples );
+}
+
+static bool
+dfb_mesa_create_context( GLcontext             *context,
+                         GLframebuffer         *framebuffer,
+                         GLvisual              *visual,
+                         DFBSurfacePixelFormat  format,
+                         void                  *data )
+{
+     struct dd_function_table     functions;
+     struct swrast_device_driver *swdd;
+     
+     _mesa_initialize_framebuffer( framebuffer, visual, 
+                                   visual->haveDepthBuffer,
+                                   visual->haveStencilBuffer,
+                                   visual->haveAccumBuffer,
+                                   visual->accumAlphaBits > 0 );
+     
+     _mesa_init_driver_functions( &functions );
+     functions.GetString     = get_string;
+     functions.UpdateState   = update_state;
+     functions.GetBufferSize = get_buffer_size;
+     functions.Viewport      = set_viewport;
+     
+     if (!_mesa_initialize_context( context, visual, NULL,
+                                    &functions, data )) {
+          D_DEBUG( "DirectFBGL/Mesa: _mesa_initialize_context() failed.\n" );
+          _mesa_free_framebuffer_data( framebuffer );
+          return false;
+     }
+
+     _swrast_CreateContext( context );
+     _ac_CreateContext( context );
+     _tnl_CreateContext( context );
+     _swsetup_CreateContext( context );
+     _swsetup_Wakeup( context );
+     
+     swdd = _swrast_GetDeviceDriverReference( context );
+     swdd->SetBuffer = set_buffer;
+     switch (format) {
+          case DSPF_RGB332: 
+               swdd->WriteRGBASpan       = write_rgba_span_RGB332;
+               swdd->WriteRGBSpan        = write_rgb_span_RGB332;
+               swdd->WriteMonoRGBASpan   = write_monorgba_span_RGB332;
+               swdd->WriteRGBAPixels     = write_rgba_pixels_RGB332;
+               swdd->WriteMonoRGBAPixels = write_monorgba_pixels_RGB332;
+               swdd->ReadRGBASpan        = read_rgba_span_RGB332;
+               swdd->ReadRGBAPixels      = read_rgba_pixels_RGB332;
+               break;
+          case DSPF_ARGB1555:
+               swdd->WriteRGBASpan       = write_rgba_span_ARGB1555;
+               swdd->WriteRGBSpan        = write_rgb_span_ARGB1555;
+               swdd->WriteMonoRGBASpan   = write_monorgba_span_ARGB1555;
+               swdd->WriteRGBAPixels     = write_rgba_pixels_ARGB1555;
+               swdd->WriteMonoRGBAPixels = write_monorgba_pixels_ARGB1555;
+               swdd->ReadRGBASpan        = read_rgba_span_ARGB1555;
+               swdd->ReadRGBAPixels      = read_rgba_pixels_ARGB1555;
+               break;
+          case DSPF_RGB16:
+               swdd->WriteRGBASpan       = write_rgba_span_RGB16;
+               swdd->WriteRGBSpan        = write_rgb_span_RGB16;
+               swdd->WriteMonoRGBASpan   = write_monorgba_span_RGB16;
+               swdd->WriteRGBAPixels     = write_rgba_pixels_RGB16;
+               swdd->WriteMonoRGBAPixels = write_monorgba_pixels_RGB16;
+               swdd->ReadRGBASpan        = read_rgba_span_RGB16;
+               swdd->ReadRGBAPixels      = read_rgba_pixels_RGB16;
+               break;
+          case DSPF_RGB24:   
+               swdd->WriteRGBASpan       = write_rgba_span_RGB24;
+               swdd->WriteRGBSpan        = write_rgb_span_RGB24;
+               swdd->WriteMonoRGBASpan   = write_monorgba_span_RGB24;
+               swdd->WriteRGBAPixels     = write_rgba_pixels_RGB24;
+               swdd->WriteMonoRGBAPixels = write_monorgba_pixels_RGB24;
+               swdd->ReadRGBASpan        = read_rgba_span_RGB24;
+               swdd->ReadRGBAPixels      = read_rgba_pixels_RGB24;
+               break;
+          case DSPF_RGB32:
+               swdd->WriteRGBASpan       = write_rgba_span_RGB32;
+               swdd->WriteRGBSpan        = write_rgb_span_RGB32;
+               swdd->WriteMonoRGBASpan   = write_monorgba_span_RGB32;
+               swdd->WriteRGBAPixels     = write_rgba_pixels_RGB32;
+               swdd->WriteMonoRGBAPixels = write_monorgba_pixels_RGB32;
+               swdd->ReadRGBASpan        = read_rgba_span_RGB32;
+               swdd->ReadRGBAPixels      = read_rgba_pixels_RGB32;
+               break;
+          case DSPF_ARGB:
+               swdd->WriteRGBASpan       = write_rgba_span_ARGB;
+               swdd->WriteRGBSpan        = write_rgb_span_ARGB;
+               swdd->WriteMonoRGBASpan   = write_monorgba_span_ARGB;
+               swdd->WriteRGBAPixels     = write_rgba_pixels_ARGB;
+               swdd->WriteMonoRGBAPixels = write_monorgba_pixels_ARGB;
+               swdd->ReadRGBASpan        = read_rgba_span_ARGB;
+               swdd->ReadRGBAPixels      = read_rgba_pixels_ARGB;
+               break;
+          case DSPF_AiRGB:
+               swdd->WriteRGBASpan       = write_rgba_span_AiRGB;
+               swdd->WriteRGBSpan        = write_rgb_span_AiRGB;
+               swdd->WriteMonoRGBASpan   = write_monorgba_span_AiRGB;
+               swdd->WriteRGBAPixels     = write_rgba_pixels_AiRGB;
+               swdd->WriteMonoRGBAPixels = write_monorgba_pixels_AiRGB;
+               swdd->ReadRGBASpan        = read_rgba_span_AiRGB;
+               swdd->ReadRGBAPixels      = read_rgba_pixels_AiRGB;
+               break;
+          default:
+               D_BUG( "unexpected pixelformat" );
+               return false;
+     }
+
+     TNL_CONTEXT( context )->Driver.RunPipeline = _tnl_run_pipeline;
+
+     _mesa_enable_sw_extensions( context );
+
+     _mesa_make_current( context, framebuffer );
+     
+     return true;
+}
+
+static void
+dfb_mesa_destroy_context( GLcontext     *context,
+                          GLframebuffer *framebuffer )
+{
+     _mesa_make_current( NULL, NULL );
+     _mesa_free_framebuffer_data( framebuffer );
+     _mesa_notifyDestroy( context );
+     _mesa_free_context_data( context );
+}    
+