GL_TEXTURE_1D and other stories...

diff --git a/src/mesa/Makefile.DJ b/src/mesa/Makefile.DJ
index bd8e6f039d60f31e9d4b22b18ebb09aa826dabfa..fdcc2ec546728d89e8486ecf03fb64324d068fc3 100644 (file)
--- a/src/mesa/Makefile.DJ
+++ b/src/mesa/Makefile.DJ
@@ -220,5 +220,6 @@ clean:
        -$(call UNLINK,swrast_setup/*.o)
        -$(call UNLINK,tnl/*.o)
        -$(call UNLINK,x86/*.o)
+       -$(call UNLINK,drivers/common/*.o)
        -$(call UNLINK,drivers/dos/*.o)
        -$(call UNLINK,drivers/glide/*.o)

diff --git a/src/mesa/Makefile.mgw b/src/mesa/Makefile.mgw
index bb370d86b455d8ad32e577e66460dae56bb0791f..7db07bc1766672852ddf2f67a39163af40e2cf13 100644 (file)
--- a/src/mesa/Makefile.mgw
+++ b/src/mesa/Makefile.mgw
@@ -217,6 +217,7 @@ clean:
        -$(call UNLINK,swrast_setup/*.o)
        -$(call UNLINK,tnl/*.o)
        -$(call UNLINK,x86/*.o)
+       -$(call UNLINK,drivers/common/*.o)
        -$(call UNLINK,drivers/windows/gdi/*.o)
        -$(call UNLINK,drivers/glide/*.o)
        -$(call UNLINK,drivers/glide/*.res)

diff --git a/src/mesa/Makefile.wfx b/src/mesa/Makefile.wfx
index 2dd985b78cf77760f1a4c36d4669f41797246b8f..0a8b8c3b0e826ea2405355402ff9a3db5c1de63c 100644 (file)
--- a/src/mesa/Makefile.wfx
+++ b/src/mesa/Makefile.wfx
@@ -249,6 +249,7 @@ TNL_SOURCES =\
        tnl\t_vtx_exec.c 
 
 DRIVER_SOURCES =\
+       drivers\common\driverfuncs.c\
        drivers\glide\fxapi.c\
        drivers\glide\fxdd.c\
        drivers\glide\fxddspan.c\
@@ -423,6 +424,7 @@ clean::
        $(RM) swrast_setup\*.obj
        $(RM) tnl\*.obj
        $(RM) x86\*.obj
+       $(RM) drivers\common\*.obj
        $(RM) drivers\glide\*.obj
         $(RM) drivers\glide\*.res
         $(RM) $(LIBDIR)\*.pdb

diff --git a/src/mesa/drivers/glide/fxdd.c b/src/mesa/drivers/glide/fxdd.c
index ef73f79641c1e4dd757e6b50b57b321ed29b81ee..448fd043d0778b87c05beead6ab0f96ea40ef053 100644 (file)
--- a/src/mesa/drivers/glide/fxdd.c
+++ b/src/mesa/drivers/glide/fxdd.c
@@ -1501,6 +1501,11 @@ fxDDInitExtensions(GLcontext * ctx)
    /* core-level extensions */
 #if 1
    _mesa_enable_extension(ctx, "GL_ARB_vertex_buffer_object");
+#endif
+   /* not just yet */
+#if 0
+   _mesa_enable_extension(ctx, "GL_ARB_fragment_program");
+   _mesa_enable_extension(ctx, "GL_ARB_vertex_program");
 #endif
 }
 
@@ -1540,6 +1545,13 @@ fx_check_IsInHardware(GLcontext * ctx)
       }
    }
 
+   /* [dBorca]
+    * We could avoid this for certain `sfactor/dfactor'
+    * I do not think that is even worthwhile to check
+    * because if someone is using blending they use more
+    * interesting settings and also it would add more
+    * state tracking to a lot of the code.
+    */
    if (ctx->Color.ColorLogicOpEnabled && (ctx->Color.LogicOp != GL_COPY)) {
       return FX_FALLBACK_LOGICOP;
    }
@@ -1558,17 +1570,18 @@ fx_check_IsInHardware(GLcontext * ctx)
 
    /* Unsupported texture/multitexture cases */
 
+   /* we can only do 1D/2D textures */
+   if (ctx->Texture.Unit[0]._ReallyEnabled & ~(TEXTURE_1D_BIT|TEXTURE_2D_BIT))
+      return FX_FALLBACK_TEXTURE_MAP;
+
    if (fxMesa->haveTwoTMUs) {
-      /* we can only do 2D textures */
-      if (ctx->Texture.Unit[0]._ReallyEnabled & ~TEXTURE_2D_BIT)
-        return FX_FALLBACK_TEXTURE_1D_3D;
-      if (ctx->Texture.Unit[1]._ReallyEnabled & ~TEXTURE_2D_BIT)
-        return FX_FALLBACK_TEXTURE_1D_3D;
+      if (ctx->Texture.Unit[1]._ReallyEnabled & ~(TEXTURE_1D_BIT|TEXTURE_2D_BIT))
+        return FX_FALLBACK_TEXTURE_MAP;
 
-      if (ctx->Texture.Unit[0]._ReallyEnabled & TEXTURE_2D_BIT) {
+      if (ctx->Texture.Unit[0]._ReallyEnabled) {
          if (fxMesa->type < GR_SSTTYPE_Voodoo2)
         if (ctx->Texture.Unit[0].EnvMode == GL_BLEND &&
-            (ctx->Texture.Unit[1]._ReallyEnabled & TEXTURE_2D_BIT ||
+            (ctx->Texture.Unit[1]._ReallyEnabled ||
              ctx->Texture.Unit[0].EnvColor[0] != 0 ||
              ctx->Texture.Unit[0].EnvColor[1] != 0 ||
              ctx->Texture.Unit[0].EnvColor[2] != 0 ||
@@ -1579,7 +1592,7 @@ fx_check_IsInHardware(GLcontext * ctx)
            return FX_FALLBACK_TEXTURE_BORDER;
       }
 
-      if (ctx->Texture.Unit[1]._ReallyEnabled & TEXTURE_2D_BIT) {
+      if (ctx->Texture.Unit[1]._ReallyEnabled) {
          if (fxMesa->type < GR_SSTTYPE_Voodoo2)
         if (ctx->Texture.Unit[1].EnvMode == GL_BLEND)
            return FX_FALLBACK_TEXTURE_ENV;
@@ -1600,6 +1613,8 @@ fx_check_IsInHardware(GLcontext * ctx)
       if (ctx->Texture._EnabledUnits == 0x3) {
         /* Can't use multipass to blend a multitextured triangle - fall
          * back to software.
+          * [dBorca] we hit this case only when we try to emulate
+          * multitexture by multipass!
          */
         if (!fxMesa->haveTwoTMUs && ctx->Color.BlendEnabled) {
            return FX_FALLBACK_TEXTURE_MULTI;
@@ -1621,7 +1636,7 @@ fx_check_IsInHardware(GLcontext * ctx)
       }
 
       if (fxMesa->type < GR_SSTTYPE_Voodoo2)
-      if ((ctx->Texture.Unit[0]._ReallyEnabled & TEXTURE_2D_BIT) &&
+      if (ctx->Texture.Unit[0]._ReallyEnabled &&
          (ctx->Texture.Unit[0].EnvMode == GL_BLEND)) {
         return FX_FALLBACK_TEXTURE_ENV;
       }
@@ -1688,12 +1703,14 @@ fxSetupDDPointers(GLcontext * ctx)
    ctx->Driver.Finish = fxDDFinish;
    ctx->Driver.Flush = NULL;
    ctx->Driver.ChooseTextureFormat = fxDDChooseTextureFormat;
+   ctx->Driver.TexImage1D = fxDDTexImage1D;
    ctx->Driver.TexImage2D = fxDDTexImage2D;
    ctx->Driver.TexSubImage2D = fxDDTexSubImage2D;
    ctx->Driver.CompressedTexImage2D = fxDDCompressedTexImage2D;
    ctx->Driver.CompressedTexSubImage2D = fxDDCompressedTexSubImage2D;
    ctx->Driver.IsCompressedFormat = fxDDIsCompressedFormat;
    ctx->Driver.CompressedTextureSize = fxDDCompressedTextureSize;
+   ctx->Driver.TestProxyTexImage = fxDDTestProxyTexImage;
    ctx->Driver.TexEnv = fxDDTexEnv;
    ctx->Driver.TexParameter = fxDDTexParam;
    ctx->Driver.BindTexture = fxDDTexBind;

diff --git a/src/mesa/drivers/glide/fxddtex.c b/src/mesa/drivers/glide/fxddtex.c
index 437d76f0d77d102acf671af99a504235dd43a4f9..80728fe57789db4a18cde7cac55794c36bb1fc5e 100644 (file)
--- a/src/mesa/drivers/glide/fxddtex.c
+++ b/src/mesa/drivers/glide/fxddtex.c
@@ -141,7 +141,7 @@ fxDDTexBind(GLcontext * ctx, GLenum target, struct gl_texture_object *tObj)
       fprintf(stderr, "fxDDTexBind(%d, %x)\n", tObj->Name, (GLuint)tObj->DriverData);
    }
 
-   if (target != GL_TEXTURE_2D)
+   if ((target != GL_TEXTURE_1D) && (target != GL_TEXTURE_2D))
       return;
 
    if (!tObj->DriverData) {
@@ -196,7 +196,7 @@ fxDDTexParam(GLcontext * ctx, GLenum target, struct gl_texture_object *tObj,
                       _mesa_lookup_enum_by_nr(param));
    }
 
-   if (target != GL_TEXTURE_2D)
+   if ((target != GL_TEXTURE_1D) && (target != GL_TEXTURE_2D))
       return;
 
    if (!tObj->DriverData)
@@ -477,6 +477,9 @@ fxDDTexPalette(GLcontext * ctx, struct gl_texture_object *tObj)
         fprintf(stderr, "fxDDTexPalette(%d, %x)\n",
                 tObj->Name, (GLuint) tObj->DriverData);
       }
+      /* This might be a proxy texture. */
+      if (!tObj->Palette.Table)
+         return; 
       if (!tObj->DriverData)
          tObj->DriverData = fxAllocTexObjData(fxMesa);
       ti = fxTMGetTexInfo(tObj);
@@ -511,6 +514,7 @@ fxDDTexUseGlbPalette(GLcontext * ctx, GLboolean state)
    else {
       fxMesa->haveGlobalPaletteTexture = 0;
 
+      /* [dBorca] tis beyond my comprehension */
       if ((ctx->Texture.Unit[0]._Current == ctx->Texture.Unit[0].Current2D) &&
          (ctx->Texture.Unit[0]._Current != NULL)) {
         struct gl_texture_object *tObj = ctx->Texture.Unit[0]._Current;
@@ -635,7 +639,7 @@ static GLboolean
 fxIsTexSupported(GLenum target, GLint internalFormat,
                 const struct gl_texture_image *image)
 {
-   if (target != GL_TEXTURE_2D)
+   if ((target != GL_TEXTURE_1D) && (target != GL_TEXTURE_2D))
       return GL_FALSE;
 
 #if 0
@@ -1227,6 +1231,7 @@ fxDDTexImage2D(GLcontext * ctx, GLenum target, GLint level,
          return;
       }
    }
+   ti = fxTMGetTexInfo(texObj);
 
    if (!texImage->DriverData) {
       texImage->DriverData = CALLOC(sizeof(tfxMipMapLevel));
@@ -1235,8 +1240,6 @@ fxDDTexImage2D(GLcontext * ctx, GLenum target, GLint level,
          return;
       }
    }
-   ti = fxTMGetTexInfo(texObj);
-
    mml = FX_MIPMAP_DATA(texImage);
 
    fxTexGetInfo(width, height, NULL, NULL, NULL, NULL,
@@ -1530,6 +1533,7 @@ fxDDCompressedTexImage2D (GLcontext *ctx, GLenum target,
          return;
       }
    }
+   ti = fxTMGetTexInfo(texObj);
 
    if (!texImage->DriverData) {
       texImage->DriverData = CALLOC(sizeof(tfxMipMapLevel));
@@ -1538,7 +1542,6 @@ fxDDCompressedTexImage2D (GLcontext *ctx, GLenum target,
          return;
       }
    }
-   ti = fxTMGetTexInfo(texObj);
    mml = FX_MIPMAP_DATA(texImage);
 
    fxTexGetInfo(width, height, NULL, NULL, NULL, NULL,
@@ -1671,6 +1674,41 @@ fxDDCompressedTexSubImage2D( GLcontext *ctx, GLenum target,
 }
 
 
+void
+fxDDTexImage1D (GLcontext *ctx, GLenum target, GLint level,
+               GLint internalFormat, GLint width, GLint border,
+               GLenum format, GLenum type, const GLvoid *pixels,
+               const struct gl_pixelstore_attrib *packing,
+               struct gl_texture_object *texObj,
+               struct gl_texture_image *texImage)
+{
+ fxDDTexImage2D(ctx, target, level,
+               internalFormat, width, 1, border,
+               format, type, pixels,
+               packing,
+               texObj,
+               texImage);
+}
+
+
+GLboolean
+fxDDTestProxyTexImage (GLcontext *ctx, GLenum target,
+                       GLint level, GLint internalFormat,
+                       GLenum format, GLenum type,
+                       GLint width, GLint height,
+                       GLint depth, GLint border)
+{
+ /* [dBorca]
+  * TODO - maybe through fxTexValidate()
+  */
+ return _mesa_test_proxy_teximage(ctx, target,
+                                  level, internalFormat,
+                                  format, type,
+                                  width, height,
+                                  depth, border);
+}
+
+
 #else /* FX */
 
 /*

diff --git a/src/mesa/drivers/glide/fxdrv.h b/src/mesa/drivers/glide/fxdrv.h
index d48e3dd3ef11f7f150ea88f715bcc4788012ada8..3e7e433f249da853ca9b600ded8f306b40341d33 100644 (file)
--- a/src/mesa/drivers/glide/fxdrv.h
+++ b/src/mesa/drivers/glide/fxdrv.h
@@ -607,6 +607,18 @@ extern void fxDDCompressedTexSubImage2D(GLcontext *ctx, GLenum target,
                                         GLsizei imageSize, const GLvoid *data,
                                         struct gl_texture_object *texObj,
                                         struct gl_texture_image *texImage);
+extern void fxDDTexImage1D(GLcontext * ctx, GLenum target, GLint level,
+                          GLint internalFormat, GLint width,
+                          GLint border, GLenum format, GLenum type,
+                          const GLvoid * pixels,
+                          const struct gl_pixelstore_attrib *packing,
+                          struct gl_texture_object *texObj,
+                          struct gl_texture_image *texImage);
+extern GLboolean fxDDTestProxyTexImage (GLcontext *ctx, GLenum target,
+                                        GLint level, GLint internalFormat,
+                                        GLenum format, GLenum type,
+                                        GLint width, GLint height,
+                                        GLint depth, GLint border);
 extern void fxDDTexEnv(GLcontext *, GLenum, GLenum, const GLfloat *);
 extern void fxDDTexParam(GLcontext *, GLenum, struct gl_texture_object *,
                         GLenum, const GLfloat *);
@@ -697,7 +709,7 @@ void fxSetupDepthTest (GLcontext *ctx);
 void fxSetupTexture (GLcontext *ctx);
 
 /* Flags for software fallback cases */
-#define FX_FALLBACK_TEXTURE_1D_3D      0x0001
+#define FX_FALLBACK_TEXTURE_MAP                0x0001
 #define FX_FALLBACK_DRAW_BUFFER                0x0002
 #define FX_FALLBACK_SPECULAR           0x0004
 #define FX_FALLBACK_STENCIL            0x0008

diff --git a/src/mesa/drivers/glide/fxsetup.c b/src/mesa/drivers/glide/fxsetup.c
index cb7c4e2b08bb0574bcc58602c0c6d060605af13a..7714e3cf80ca090e1b308be7e8985418337a5c0c 100644 (file)
--- a/src/mesa/drivers/glide/fxsetup.c
+++ b/src/mesa/drivers/glide/fxsetup.c
@@ -537,7 +537,7 @@ fxSetupTextureSingleTMU_NoLock(GLcontext * ctx, GLuint textureset)
    GLuint unitsmode;
    GLint ifmt;
    tfxTexInfo *ti;
-   struct gl_texture_object *tObj = ctx->Texture.Unit[textureset].Current2D;
+   struct gl_texture_object *tObj = ctx->Texture.Unit[textureset]._Current;
    int tmu;
 
    if (TDFX_DEBUG & VERBOSE_DRIVER) {
@@ -921,8 +921,8 @@ fxSetupTextureDoubleTMU_NoLock(GLcontext * ctx)
    struct tdfx_texcombine tex0, tex1;
    GrCombineLocal_t localc, locala;
    tfxTexInfo *ti0, *ti1;
-   struct gl_texture_object *tObj0 = ctx->Texture.Unit[1].Current2D;
-   struct gl_texture_object *tObj1 = ctx->Texture.Unit[0].Current2D;
+   struct gl_texture_object *tObj0 = ctx->Texture.Unit[1]._Current;
+   struct gl_texture_object *tObj1 = ctx->Texture.Unit[0]._Current;
    GLuint envmode, ifmt, unitsmode;
    int tmu0 = 0, tmu1 = 1;
 
@@ -1269,15 +1269,15 @@ fxSetupTexture_NoLock(GLcontext * ctx)
 
    if (fxMesa->HaveCmbExt) {
       /* Texture Combine, Color Combine and Alpha Combine. */
-      if (ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT &&
-          ctx->Texture.Unit[1]._ReallyEnabled == TEXTURE_2D_BIT &&
+      if ((ctx->Texture.Unit[0]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) &&
+          (ctx->Texture.Unit[1]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) &&
           fxMesa->haveTwoTMUs) {
          fxSetupTextureDoubleTMUNapalm_NoLock(ctx);
       }
-      else if (ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT) {
+      else if (ctx->Texture.Unit[0]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) {
          fxSetupTextureSingleTMUNapalm_NoLock(ctx, 0);
       }
-      else if (ctx->Texture.Unit[1]._ReallyEnabled == TEXTURE_2D_BIT) {
+      else if (ctx->Texture.Unit[1]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) {
          fxSetupTextureSingleTMUNapalm_NoLock(ctx, 1);
       }
       else {
@@ -1285,15 +1285,15 @@ fxSetupTexture_NoLock(GLcontext * ctx)
       }
    } else {
       /* Texture Combine, Color Combine and Alpha Combine. */
-      if (ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT &&
-          ctx->Texture.Unit[1]._ReallyEnabled == TEXTURE_2D_BIT &&
+      if ((ctx->Texture.Unit[0]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) &&
+          (ctx->Texture.Unit[1]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) &&
           fxMesa->haveTwoTMUs) {
          fxSetupTextureDoubleTMU_NoLock(ctx);
       }
-      else if (ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT) {
+      else if (ctx->Texture.Unit[0]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) {
          fxSetupTextureSingleTMU_NoLock(ctx, 0);
       }
-      else if (ctx->Texture.Unit[1]._ReallyEnabled == TEXTURE_2D_BIT) {
+      else if (ctx->Texture.Unit[1]._ReallyEnabled & (TEXTURE_1D_BIT|TEXTURE_2D_BIT)) {
          fxSetupTextureSingleTMU_NoLock(ctx, 1);
       }
       else {
@@ -2039,6 +2039,7 @@ fxDDEnable(GLcontext * ctx, GLenum cap, GLboolean state)
    case GL_LINE_STIPPLE:
    case GL_POINT_SMOOTH:
    case GL_POLYGON_SMOOTH:
+   case GL_TEXTURE_1D:
    case GL_TEXTURE_2D:
       fxMesa->new_state |= FX_NEW_TEXTURING;
       break;

diff --git a/src/mesa/drivers/glide/fxsetup.h b/src/mesa/drivers/glide/fxsetup.h
index 7d76592498644c8c981f3c929da8d67121007f07..236c9836624fff7a53810040547f2619251d6b71 100644 (file)
--- a/src/mesa/drivers/glide/fxsetup.h
+++ b/src/mesa/drivers/glide/fxsetup.h
@@ -169,7 +169,7 @@ fxSetupTextureEnvNapalm_NoLock(GLcontext * ctx, GLuint textureset, GLuint tmu, G
    GrCombineLocal_t localc, locala; /* fragmentColor/Alpha */
    GLint ifmt;
    tfxTexInfo *ti;
-   struct gl_texture_object *tObj = texUnit->Current2D;
+   struct gl_texture_object *tObj = texUnit->_Current;
 
    if (TDFX_DEBUG & VERBOSE_DRIVER) {
       fprintf(stderr, "fxSetupTextureEnvNapalm_NoLock(unit %u, TMU %u, iterated %d)\n",
@@ -1106,7 +1106,7 @@ fxSetupTextureSingleTMUNapalm_NoLock(GLcontext * ctx, GLuint textureset)
    fxMesaContext fxMesa = FX_CONTEXT(ctx);
    GLuint unitsmode;
    tfxTexInfo *ti;
-   struct gl_texture_object *tObj = ctx->Texture.Unit[textureset].Current2D;
+   struct gl_texture_object *tObj = ctx->Texture.Unit[textureset]._Current;
    int tmu;
 
    if (TDFX_DEBUG & VERBOSE_DRIVER) {
@@ -1158,8 +1158,8 @@ fxSetupTextureDoubleTMUNapalm_NoLock(GLcontext * ctx)
 {
    fxMesaContext fxMesa = FX_CONTEXT(ctx);
    tfxTexInfo *ti0, *ti1;
-   struct gl_texture_object *tObj0 = ctx->Texture.Unit[1].Current2D;
-   struct gl_texture_object *tObj1 = ctx->Texture.Unit[0].Current2D;
+   struct gl_texture_object *tObj0 = ctx->Texture.Unit[1]._Current;
+   struct gl_texture_object *tObj1 = ctx->Texture.Unit[0]._Current;
    GLuint unitsmode;
    int tmu0 = 0, tmu1 = 1;
 

diff --git a/src/mesa/drivers/glide/fxtris.c b/src/mesa/drivers/glide/fxtris.c
index 846fd95f711e6d4c3ef14f3d66257875e5b16840..c9441673a49a8b1d4152e9884f60907c72b7c882 100644 (file)
--- a/src/mesa/drivers/glide/fxtris.c
+++ b/src/mesa/drivers/glide/fxtris.c
@@ -1299,7 +1299,7 @@ static void fxRenderFinish( GLcontext *ctx )
 /**********************************************************************/
 
 static char *fallbackStrings[] = {
-   "1D/3D Texture map",
+   "3D/Rect/Cube Texture map",
    "glDrawBuffer(GL_FRONT_AND_BACK)",
    "Separate specular color",
    "glEnable/Disable(GL_STENCIL_TEST)",

diff --git a/src/mesa/drivers/glide/fxwgl.c b/src/mesa/drivers/glide/fxwgl.c
index ae1d913f3bf92aa8ff0f3fb6207d4cfd0991a56f..c17560d72470787256a42f58741ffdc3bc94a2ce 100644 (file)
--- a/src/mesa/drivers/glide/fxwgl.c
+++ b/src/mesa/drivers/glide/fxwgl.c
@@ -290,6 +290,14 @@ __wglMonitor(HWND hwnd, UINT message, UINT wParam, LONG lParam)
    return (ret);
 }
 
+static void wgl_error (long error)
+{
+#define WGL_INVALID_PIXELFORMAT ERROR_INVALID_PIXEL_FORMAT
+ SetLastError(0xC0000000 /* error severity */
+             |0x00070000 /* error facility (who we are) */
+             |error);
+}
+
 GLAPI BOOL GLAPIENTRY
 wglCopyContext(HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask)
 {
@@ -314,7 +322,7 @@ wglCreateContext(HDC hdc)
    }
 
    if (curPFD == 0) {
-      SetLastError(0);
+      wgl_error(WGL_INVALID_PIXELFORMAT);
       return (NULL);
    }