tdfx_context.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

	 newFx->width = 0;
         tdfxUpdateClipping(newCtx);
         tdfxUploadClipping(newFx);

	 UNLOCK_HARDWARE( newFx );
      } else {
	 LOCK_HARDWARE( newFx );

	 newFx->Glide.grSstSelect( newFx->Glide.Board );
	 newFx->Glide.grGlideSetState( newFx->Glide.State );

         tdfxUpdateClipping(newCtx);
         tdfxUploadClipping(newFx);

	 UNLOCK_HARDWARE( newFx );
      }

      _mesa_make_current( newCtx,
                          (GLframebuffer *) driDrawPriv->driverPrivate,
                          (GLframebuffer *) driReadPriv->driverPrivate );
   } else {
      _mesa_make_current( NULL, NULL, NULL );
   }

   return GL_TRUE;
}


/*
 * Enable this to trace calls to various Glide functions.
 */
/*#define DEBUG_TRAP*/
#ifdef DEBUG_TRAP
static void (*real_grDrawTriangle)( const void *a, const void *b, const void *c );
static void (*real_grDrawPoint)( const void *a );
static void (*real_grDrawVertexArray)(FxU32 mode, FxU32 Count, void *pointers);
static void (*real_grDrawVertexArrayContiguous)(FxU32 mode, FxU32 Count,
                                       void *pointers, FxU32 stride);
static void (*real_grClipWindow)( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy );

static void (*real_grVertexLayout)(FxU32 param, FxI32 offset, FxU32 mode);
static void (*real_grGlideGetVertexLayout)( void *layout );
static void (*real_grGlideSetVertexLayout)( const void *layout );

static void (*real_grTexDownloadMipMapLevel)( GrChipID_t        tmu,
                                     FxU32             startAddress,
                                     GrLOD_t           thisLod,
                                     GrLOD_t           largeLod,
                                     GrAspectRatio_t   aspectRatio,
                                     GrTextureFormat_t format,
                                     FxU32             evenOdd,
                                              void              *data );


static void debug_grDrawTriangle( const void *a, const void *b, const void *c )
{
   printf("%s\n", __FUNCTION__);
   (*real_grDrawTriangle)(a, b, c);
}

static void debug_grDrawPoint( const void *a )
{
   const float *f = (const float *) a;
   printf("%s %g %g\n", __FUNCTION__, f[0], f[1]);
   (*real_grDrawPoint)(a);
}

static void debug_grDrawVertexArray(FxU32 mode, FxU32 Count, void *pointers)
{
   printf("%s count=%d\n", __FUNCTION__, (int) Count);
   (*real_grDrawVertexArray)(mode, Count, pointers);
}

static void debug_grDrawVertexArrayContiguous(FxU32 mode, FxU32 Count,
                                       void *pointers, FxU32 stride)
{
   printf("%s mode=0x%x count=%d\n", __FUNCTION__, (int) mode, (int) Count);
   (*real_grDrawVertexArrayContiguous)(mode, Count, pointers, stride);
}

static void debug_grClipWindow( FxU32 minx, FxU32 miny, FxU32 maxx, FxU32 maxy )
{
   printf("%s %d,%d .. %d,%d\n", __FUNCTION__,
          (int) minx, (int) miny, (int) maxx, (int) maxy);
   (*real_grClipWindow)(minx, miny, maxx, maxy);
}

static void debug_grVertexLayout(FxU32 param, FxI32 offset, FxU32 mode)
{
   (*real_grVertexLayout)(param, offset, mode);
}

static void debug_grGlideGetVertexLayout( void *layout )
{
   (*real_grGlideGetVertexLayout)(layout);
}

static void debug_grGlideSetVertexLayout( const void *layout )
{
   (*real_grGlideSetVertexLayout)(layout);
}

static void debug_grTexDownloadMipMapLevel( GrChipID_t        tmu,
                                     FxU32             startAddress,
                                     GrLOD_t           thisLod,
                                     GrLOD_t           largeLod,
                                     GrAspectRatio_t   aspectRatio,
                                     GrTextureFormat_t format,
                                     FxU32             evenOdd,
                                     void              *data )
{
   (*real_grTexDownloadMipMapLevel)(tmu, startAddress, thisLod, largeLod,
                                    aspectRatio, format, evenOdd, data);
}

#endif


/*
 * Examine the context's deviceID to determine what kind of 3dfx hardware
 * is installed.  dlopen() the appropriate Glide library and initialize
 * this context's Glide function pointers.
 * Return:  true/false = success/failure
 */
GLboolean tdfxInitGlide(tdfxContextPtr tmesa)
{
   static const char *defaultGlide = "libglide3.so";
   const char *libName;
   void *libHandle;

   /*
    * XXX this code which selects a Glide library filename given the
    * deviceID may need to be cleaned up a bit.
    * Non-Linux systems may have different filenames, for example.
    */
   switch (tmesa->fxScreen->deviceID) {
   case PCI_CHIP_BANSHEE:
   case PCI_CHIP_VOODOO3:
      libName = "libglide3-v3.so";
      break;
   case PCI_CHIP_VOODOO5:   /* same as PCI_CHIP_VOODOO4 */
      libName = "libglide3-v5.so";
      break;
   default:
      {
         __driUtilMessage("unrecognized 3dfx deviceID: 0x%x",
                 tmesa->fxScreen->deviceID);
      }
      return GL_FALSE;
   }

   libHandle = dlopen(libName, RTLD_NOW);
   if (!libHandle) {
      /* The device-specific Glide library filename didn't work, try the
       * old, generic libglide3.so library.
       */
      libHandle = dlopen(defaultGlide, RTLD_NOW); 
      if (!libHandle) {
         __driUtilMessage(
            "can't find Glide library, dlopen(%s) and dlopen(%s) both failed.",
            libName, defaultGlide);
         __driUtilMessage("dlerror() message: %s", dlerror());
         return GL_FALSE;
      }
      libName = defaultGlide;
   }

   {
      const char *env = getenv("LIBGL_DEBUG");
      if (env && strstr(env, "verbose")) {
         fprintf(stderr, "libGL: using Glide library %s\n", libName);
      }
   }         

#define GET_FUNCTION(PTR, NAME)						\
   tmesa->Glide.PTR = dlsym(libHandle, NAME);				\
   if (!tmesa->Glide.PTR) {						\
      __driUtilMessage("couldn't find Glide function %s in %s.",	\
              NAME, libName);						\
   }

   GET_FUNCTION(grDrawPoint, "grDrawPoint");
   GET_FUNCTION(grDrawLine, "grDrawLine");
   GET_FUNCTION(grDrawTriangle, "grDrawTriangle");
   GET_FUNCTION(grVertexLayout, "grVertexLayout");
   GET_FUNCTION(grDrawVertexArray, "grDrawVertexArray");
   GET_FUNCTION(grDrawVertexArrayContiguous, "grDrawVertexArrayContiguous");
   GET_FUNCTION(grBufferClear, "grBufferClear");
   /*GET_FUNCTION(grBufferSwap, "grBufferSwap");*/
   GET_FUNCTION(grRenderBuffer, "grRenderBuffer");
   GET_FUNCTION(grErrorSetCallback, "grErrorSetCallback");
   GET_FUNCTION(grFinish, "grFinish");
   GET_FUNCTION(grFlush, "grFlush");
   GET_FUNCTION(grSstWinOpen, "grSstWinOpen");
   GET_FUNCTION(grSstWinClose, "grSstWinClose");
#if 0
   /* Not in V3 lib, and not used anyway. */
   GET_FUNCTION(grSetNumPendingBuffers, "grSetNumPendingBuffers");
#endif
   GET_FUNCTION(grSelectContext, "grSelectContext");
   GET_FUNCTION(grSstOrigin, "grSstOrigin");
   GET_FUNCTION(grSstSelect, "grSstSelect");
   GET_FUNCTION(grAlphaBlendFunction, "grAlphaBlendFunction");
   GET_FUNCTION(grAlphaCombine, "grAlphaCombine");
   GET_FUNCTION(grAlphaControlsITRGBLighting, "grAlphaControlsITRGBLighting");
   GET_FUNCTION(grAlphaTestFunction, "grAlphaTestFunction");
   GET_FUNCTION(grAlphaTestReferenceValue, "grAlphaTestReferenceValue");
   GET_FUNCTION(grChromakeyMode, "grChromakeyMode");
   GET_FUNCTION(grChromakeyValue, "grChromakeyValue");
   GET_FUNCTION(grClipWindow, "grClipWindow");
   GET_FUNCTION(grColorCombine, "grColorCombine");
   GET_FUNCTION(grColorMask, "grColorMask");
   GET_FUNCTION(grCullMode, "grCullMode");
   GET_FUNCTION(grConstantColorValue, "grConstantColorValue");
   GET_FUNCTION(grDepthBiasLevel, "grDepthBiasLevel");
   GET_FUNCTION(grDepthBufferFunction, "grDepthBufferFunction");
   GET_FUNCTION(grDepthBufferMode, "grDepthBufferMode");
   GET_FUNCTION(grDepthMask, "grDepthMask");
   GET_FUNCTION(grDisableAllEffects, "grDisableAllEffects");
   GET_FUNCTION(grDitherMode, "grDitherMode");
   GET_FUNCTION(grFogColorValue, "grFogColorValue");
   GET_FUNCTION(grFogMode, "grFogMode");
   GET_FUNCTION(grFogTable, "grFogTable");
   GET_FUNCTION(grLoadGammaTable, "grLoadGammaTable");
   GET_FUNCTION(grSplash, "grSplash");
   GET_FUNCTION(grGet, "grGet");
   GET_FUNCTION(grGetString, "grGetString");
   GET_FUNCTION(grQueryResolutions, "grQueryResolutions");
   GET_FUNCTION(grReset, "grReset");
   GET_FUNCTION(grGetProcAddress, "grGetProcAddress");
   GET_FUNCTION(grEnable, "grEnable");
   GET_FUNCTION(grDisable, "grDisable");
   GET_FUNCTION(grCoordinateSpace, "grCoordinateSpace");
   GET_FUNCTION(grDepthRange, "grDepthRange");
   GET_FUNCTION(grStippleMode, "grStippleMode");
   GET_FUNCTION(grStipplePattern, "grStipplePattern");
   GET_FUNCTION(grViewport, "grViewport");
   GET_FUNCTION(grTexCalcMemRequired, "grTexCalcMemRequired");
   GET_FUNCTION(grTexTextureMemRequired, "grTexTextureMemRequired");
   GET_FUNCTION(grTexMinAddress, "grTexMinAddress");
   GET_FUNCTION(grTexMaxAddress, "grTexMaxAddress");
   GET_FUNCTION(grTexNCCTable, "grTexNCCTable");
   GET_FUNCTION(grTexSource, "grTexSource");
   GET_FUNCTION(grTexClampMode, "grTexClampMode");
   GET_FUNCTION(grTexCombine, "grTexCombine");
   GET_FUNCTION(grTexDetailControl, "grTexDetailControl");
   GET_FUNCTION(grTexFilterMode, "grTexFilterMode");
   GET_FUNCTION(grTexLodBiasValue, "grTexLodBiasValue");
   GET_FUNCTION(grTexDownloadMipMap, "grTexDownloadMipMap");
   GET_FUNCTION(grTexDownloadMipMapLevel, "grTexDownloadMipMapLevel");
   GET_FUNCTION(grTexDownloadMipMapLevelPartial, "grTexDownloadMipMapLevelPartial");
   GET_FUNCTION(grTexDownloadTable, "grTexDownloadTable");
   GET_FUNCTION(grTexDownloadTablePartial, "grTexDownloadTablePartial");
   GET_FUNCTION(grTexMipMapMode, "grTexMipMapMode");
   GET_FUNCTION(grTexMultibase, "grTexMultibase");
   GET_FUNCTION(grTexMultibaseAddress, "grTexMultibaseAddress");
   GET_FUNCTION(grLfbLock, "grLfbLock");
   GET_FUNCTION(grLfbUnlock, "grLfbUnlock");
   GET_FUNCTION(grLfbConstantAlpha, "grLfbConstantAlpha");
   GET_FUNCTION(grLfbConstantDepth, "grLfbConstantDepth");
   GET_FUNCTION(grLfbWriteColorSwizzle, "grLfbWriteColorSwizzle");
   GET_FUNCTION(grLfbWriteColorFormat, "grLfbWriteColorFormat");
   GET_FUNCTION(grLfbWriteRegion, "grLfbWriteRegion");
   GET_FUNCTION(grLfbReadRegion, "grLfbReadRegion");
   GET_FUNCTION(grGlideInit, "grGlideInit");
   GET_FUNCTION(grGlideShutdown, "grGlideShutdown");
   GET_FUNCTION(grGlideGetState, "grGlideGetState");
   GET_FUNCTION(grGlideSetState, "grGlideSetState");
   GET_FUNCTION(grGlideGetVertexLayout, "grGlideGetVertexLayout");
   GET_FUNCTION(grGlideSetVertexLayout, "grGlideSetVertexLayout");

   /* Glide utility functions */
   GET_FUNCTION(guFogGenerateExp, "guFogGenerateExp");
   GET_FUNCTION(guFogGenerateExp2, "guFogGenerateExp2");
   GET_FUNCTION(guFogGenerateLinear, "guFogGenerateLinear");

   /* DRI functions */
   GET_FUNCTION(grDRIOpen, "grDRIOpen");
   GET_FUNCTION(grDRIPosition, "grDRIPosition");
   /*GET_FUNCTION(grDRILostContext, "grDRILostContext");*/
   GET_FUNCTION(grDRIImportFifo, "grDRIImportFifo");
   GET_FUNCTION(grDRIInvalidateAll, "grDRIInvalidateAll");
   GET_FUNCTION(grDRIResetSAREA, "grDRIResetSAREA");
   GET_FUNCTION(grDRIBufferSwap, "grDRIBufferSwap");

   /*
    * Extension functions:
    * Just use dlysm() because we want a NULL pointer if the function is
    * not found.
    */
   /* PIXEXT extension */
   tmesa->Glide.grStencilFunc = dlsym(libHandle, "grStencilFunc");
   tmesa->Glide.grStencilMask = dlsym(libHandle, "grStencilMask");
   tmesa->Glide.grStencilOp = dlsym(libHandle, "grStencilOp");
   tmesa->Glide.grBufferClearExt = dlsym(libHandle, "grBufferClearExt");
   tmesa->Glide.grColorMaskExt = dlsym(libHandle, "grColorMaskExt");
   /* COMBINE extension */
   tmesa->Glide.grColorCombineExt = dlsym(libHandle, "grColorCombineExt");
   tmesa->Glide.grTexColorCombineExt = dlsym(libHandle, "grTexColorCombineExt");
   tmesa->Glide.grAlphaCombineExt = dlsym(libHandle, "grAlphaCombineExt");
   tmesa->Glide.grTexAlphaCombineExt = dlsym(libHandle, "grTexAlphaCombineExt");
   tmesa->Glide.grAlphaBlendFunctionExt = dlsym(libHandle, "grAlphaBlendFunctionExt");
   tmesa->Glide.grConstantColorValueExt = dlsym(libHandle, "grConstantColorValueExt");
   /* Texus 2 */
   tmesa->Glide.txImgQuantize = dlsym(libHandle, "txImgQuantize");
   tmesa->Glide.txImgDequantizeFXT1 = dlsym(libHandle, "_txImgDequantizeFXT1");
   tmesa->Glide.txErrorSetCallback = dlsym(libHandle, "txErrorSetCallback");
   
#ifdef DEBUG_TRAP
   /* wrap the drawing functions so we can trap them */
   real_grDrawTriangle = tmesa->Glide.grDrawTriangle;
   tmesa->Glide.grDrawTriangle = debug_grDrawTriangle;

   real_grDrawPoint = tmesa->Glide.grDrawPoint;
   tmesa->Glide.grDrawPoint = debug_grDrawPoint;

   real_grDrawVertexArray = tmesa->Glide.grDrawVertexArray;
   tmesa->Glide.grDrawVertexArray = debug_grDrawVertexArray;

   real_grDrawVertexArrayContiguous = tmesa->Glide.grDrawVertexArrayContiguous;
   tmesa->Glide.grDrawVertexArrayContiguous = debug_grDrawVertexArrayContiguous;

   real_grClipWindow = tmesa->Glide.grClipWindow;
   tmesa->Glide.grClipWindow = debug_grClipWindow;

   real_grVertexLayout = tmesa->Glide.grVertexLayout;
   tmesa->Glide.grVertexLayout = debug_grVertexLayout;

   real_grGlideGetVertexLayout = tmesa->Glide.grGlideGetVertexLayout;
   tmesa->Glide.grGlideGetVertexLayout = debug_grGlideGetVertexLayout;

   real_grGlideSetVertexLayout = tmesa->Glide.grGlideSetVertexLayout;
   tmesa->Glide.grGlideSetVertexLayout = debug_grGlideSetVertexLayout;

   real_grTexDownloadMipMapLevel = tmesa->Glide.grTexDownloadMipMapLevel;
   tmesa->Glide.grTexDownloadMipMapLevel = debug_grTexDownloadMipMapLevel;

#endif
   return GL_TRUE;
}