mesa: remove a bunch of gl_renderbuffer fields

_ActualFormat is replaced by Format (MESA_FORMAT_x).
ColorEncoding, ComponentType, RedBits, GreenBits, BlueBits, etc. are
all replaced by MESA_FORMAT_x queries.

7 files changed, 469 insertions, 425 deletions

diff --git a/src/mesa/main/depthstencil.c b/src/mesa/main/depthstencil.c
index 7be2aacaf2..803dc6c75e 100644
--- a/src/mesa/main/depthstencil.c
+++ b/src/mesa/main/depthstencil.c
@@ -26,6 +26,7 @@
 #include "imports.h"
 #include "context.h"
 #include "fbobject.h"
+#include "formats.h"
 #include "mtypes.h"
 #include "depthstencil.h"
 #include "renderbuffer.h"
@@ -40,8 +41,8 @@
  * a combined Z+stencil buffer!  That implies we need three different sets
  * of Get/Put functions.
  *
- * We solve this by wrapping the Z24_S8 renderbuffer with depth and stencil
- * adaptors, each with the right kind of depth/stencil Get/Put functions.
+ * We solve this by wrapping the Z24_S8 or S8_Z24 renderbuffer with depth and
+ * stencil adaptors, each with the right kind of depth/stencil Get/Put functions.
  */
 
 
@@ -62,8 +63,8 @@ nop_get_pointer(GLcontext *ctx, struct gl_renderbuffer *rb, GLint x, GLint y)
 static void
 delete_wrapper(struct gl_renderbuffer *rb)
 {
-   ASSERT(rb->_ActualFormat == GL_DEPTH_COMPONENT24 ||
-          rb->_ActualFormat == GL_STENCIL_INDEX8_EXT);
+   ASSERT(rb->Format == MESA_FORMAT_Z24_S8 ||
+          rb->Format == MESA_FORMAT_S8_Z24);
    _mesa_reference_renderbuffer(&rb->Wrapped, NULL);
    _mesa_free(rb);
 }
@@ -82,7 +83,8 @@ alloc_wrapper_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 
    (void) internalFormat;
 
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
+   ASSERT(dsrb->Format == MESA_FORMAT_Z24_S8 ||
+          dsrb->Format == MESA_FORMAT_S8_Z24);
 
    retVal = dsrb->AllocStorage(ctx, dsrb, dsrb->InternalFormat, width, height);
    if (retVal) {
@@ -108,14 +110,21 @@ get_row_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
    GLuint *dst = (GLuint *) values;
    const GLuint *src = (const GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
    ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (!src) {
       dsrb->GetRow(ctx, dsrb, count, x, y, temp);
       src = temp;
    }
-   for (i = 0; i < count; i++) {
-      dst[i] = src[i] >> 8;
+   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+      for (i = 0; i < count; i++) {
+         dst[i] = src[i] >> 8;
+      }
+   }
+   else {
+      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+      for (i = 0; i < count; i++) {
+         dst[i] = src[i] & 0xffffff;
+      }
    }
 }
 
@@ -127,13 +136,20 @@ get_values_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
    GLuint temp[MAX_WIDTH], i;
    GLuint *dst = (GLuint *) values;
    ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    ASSERT(count <= MAX_WIDTH);
    /* don't bother trying direct access */
    dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   for (i = 0; i < count; i++) {
-      dst[i] = temp[i] >> 8;
+   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+      for (i = 0; i < count; i++) {
+         dst[i] = temp[i] >> 8;
+      }
+   }
+   else {
+      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+      for (i = 0; i < count; i++) {
+         dst[i] = temp[i] & 0xffffff;
+      }
    }
 }
 
@@ -145,14 +161,23 @@ put_row_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
    const GLuint *src = (const GLuint *) values;
    GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
    ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (dst) {
       /* direct access */
       GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            dst[i] = (src[i] << 8) | (dst[i] & 0xff);
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = (src[i] << 8) | (dst[i] & 0xff);
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = (src[i] & 0xffffff) | (dst[i] & 0xff000000);
+            }
          }
       }
    }
@@ -160,9 +185,19 @@ put_row_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
       /* get, modify, put */
       GLuint temp[MAX_WIDTH], i;
       dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = (src[i] << 8) | (temp[i] & 0xff);
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (src[i] << 8) | (temp[i] & 0xff);
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (src[i] & 0xffffff) | (temp[i] & 0xff000000);
+            }
          }
       }
       dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
@@ -174,17 +209,27 @@ put_mono_row_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
                  GLint x, GLint y, const void *value, const GLubyte *mask)
 {
    struct gl_renderbuffer *dsrb = z24rb->Wrapped;
-   const GLuint shiftedVal = *((GLuint *) value) << 8;
    GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
    ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (dst) {
       /* direct access */
       GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            dst[i] = shiftedVal | (dst[i] & 0xff);
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         const GLuint shiftedVal = *((GLuint *) value) << 8;
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = shiftedVal | (dst[i] & 0xff);
+            }
+         }
+      }
+      else {
+         const GLuint shiftedVal = *((GLuint *) value);
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = shiftedVal | (dst[i] & 0xff000000);
+            }
          }
       }
    }
@@ -192,9 +237,21 @@ put_mono_row_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
       /* get, modify, put */
       GLuint temp[MAX_WIDTH], i;
       dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = shiftedVal | (temp[i] & 0xff);
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         const GLuint shiftedVal = *((GLuint *) value) << 8;
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = shiftedVal | (temp[i] & 0xff);
+            }
+         }
+      }
+      else {
+         const GLuint shiftedVal = *((GLuint *) value);
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = shiftedVal | (temp[i] & 0xff000000);
+            }
          }
       }
       dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
@@ -209,15 +266,25 @@ put_values_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
    struct gl_renderbuffer *dsrb = z24rb->Wrapped;
    const GLuint *src = (const GLuint *) values;
    ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (dsrb->GetPointer(ctx, dsrb, 0, 0)) {
       /* direct access */
       GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-            *dst = (src[i] << 8) | (*dst & 0xff);
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
+               *dst = (src[i] << 8) | (*dst & 0xff);
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
+               *dst = (src[i] & 0xffffff) | (*dst & 0xff000000);
+            }
          }
       }
    }
@@ -225,9 +292,19 @@ put_values_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb, GLuint count,
       /* get, modify, put */
       GLuint temp[MAX_WIDTH], i;
       dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = (src[i] << 8) | (temp[i] & 0xff);
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (src[i] << 8) | (temp[i] & 0xff);
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (src[i] & 0xffffff) | (temp[i] & 0xff000000);
+            }
          }
       }
       dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
@@ -241,12 +318,23 @@ put_mono_values_z24(GLcontext *ctx, struct gl_renderbuffer *z24rb,
 {
    struct gl_renderbuffer *dsrb = z24rb->Wrapped;
    GLuint temp[MAX_WIDTH], i;
-   const GLuint shiftedVal = *((GLuint *) value) << 8;
    /* get, modify, put */
    dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   for (i = 0; i < count; i++) {
-      if (!mask || mask[i]) {
-         temp[i] = shiftedVal | (temp[i] & 0xff);
+   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+      const GLuint shiftedVal = *((GLuint *) value) << 8;
+      for (i = 0; i < count; i++) {
+         if (!mask || mask[i]) {
+            temp[i] = shiftedVal | (temp[i] & 0xff);
+         }
+      }
+   }
+   else {
+      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+      const GLuint shiftedVal = *((GLuint *) value);
+      for (i = 0; i < count; i++) {
+         if (!mask || mask[i]) {
+            temp[i] = shiftedVal | (temp[i] & 0xff000000);
+         }
       }
    }
    dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
@@ -264,7 +352,8 @@ _mesa_new_z24_renderbuffer_wrapper(GLcontext *ctx,
 {
    struct gl_renderbuffer *z24rb;
 
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
+   ASSERT(dsrb->Format == MESA_FORMAT_Z24_S8 ||
+          dsrb->Format == MESA_FORMAT_S8_Z24);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
 
    z24rb = _mesa_new_renderbuffer(ctx, 0);
@@ -277,10 +366,9 @@ _mesa_new_z24_renderbuffer_wrapper(GLcontext *ctx,
    z24rb->Width = dsrb->Width;
    z24rb->Height = dsrb->Height;
    z24rb->InternalFormat = GL_DEPTH_COMPONENT24;
-   z24rb->_ActualFormat = GL_DEPTH_COMPONENT24;
+   z24rb->Format = MESA_FORMAT_Z24_S8;
    z24rb->_BaseFormat = GL_DEPTH_COMPONENT;
    z24rb->DataType = GL_UNSIGNED_INT;
-   z24rb->DepthBits = 24;
    z24rb->Data = NULL;
    z24rb->Delete = delete_wrapper;
    z24rb->AllocStorage = alloc_wrapper_storage;
@@ -310,14 +398,21 @@ get_row_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
    GLubyte *dst = (GLubyte *) values;
    const GLuint *src = (const GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
    ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (!src) {
       dsrb->GetRow(ctx, dsrb, count, x, y, temp);
       src = temp;
    }
-   for (i = 0; i < count; i++) {
-      dst[i] = src[i] & 0xff;
+   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+      for (i = 0; i < count; i++) {
+         dst[i] = src[i] & 0xff;
+      }
+   }
+   else {
+      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+      for (i = 0; i < count; i++) {
+         dst[i] = src[i] >> 24;
+      }
    }
 }
 
@@ -329,13 +424,20 @@ get_values_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
    GLuint temp[MAX_WIDTH], i;
    GLubyte *dst = (GLubyte *) values;
    ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    ASSERT(count <= MAX_WIDTH);
    /* don't bother trying direct access */
    dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   for (i = 0; i < count; i++) {
-      dst[i] = temp[i] & 0xff;
+   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+      for (i = 0; i < count; i++) {
+         dst[i] = temp[i] & 0xff;
+      }
+   }
+   else {
+      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+      for (i = 0; i < count; i++) {
+         dst[i] = temp[i] >> 24;
+      }
    }
 }
 
@@ -347,14 +449,23 @@ put_row_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
    const GLubyte *src = (const GLubyte *) values;
    GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
    ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (dst) {
       /* direct access */
       GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            dst[i] = (dst[i] & 0xffffff00) | src[i];
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = (dst[i] & 0xffffff00) | src[i];
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = (dst[i] & 0xffffff) | (src[i] << 24);
+            }
          }
       }
    }
@@ -362,9 +473,19 @@ put_row_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
       /* get, modify, put */
       GLuint temp[MAX_WIDTH], i;
       dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = (temp[i] & 0xffffff00) | src[i];
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (temp[i] & 0xffffff00) | src[i];
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (temp[i] & 0xffffff) | (src[i] << 24);
+            }
          }
       }
       dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
@@ -379,14 +500,23 @@ put_mono_row_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
    const GLubyte val = *((GLubyte *) value);
    GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
    ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (dst) {
       /* direct access */
       GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            dst[i] = (dst[i] & 0xffffff00) | val;
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = (dst[i] & 0xffffff00) | val;
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               dst[i] = (dst[i] & 0xffffff) | (val << 24);
+            }
          }
       }
    }
@@ -394,9 +524,19 @@ put_mono_row_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
       /* get, modify, put */
       GLuint temp[MAX_WIDTH], i;
       dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = (temp[i] & 0xffffff00) | val;
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (temp[i] & 0xffffff00) | val;
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (temp[i] & 0xffffff) | (val << 24);
+            }
          }
       }
       dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
@@ -411,15 +551,25 @@ put_values_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
    struct gl_renderbuffer *dsrb = s8rb->Wrapped;
    const GLubyte *src = (const GLubyte *) values;
    ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
    if (dsrb->GetPointer(ctx, dsrb, 0, 0)) {
       /* direct access */
       GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-            *dst = (*dst & 0xffffff00) | src[i];
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
+               *dst = (*dst & 0xffffff00) | src[i];
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
+               *dst = (*dst & 0xffffff) | (src[i] << 24);
+            }
          }
       }
    }
@@ -427,9 +577,19 @@ put_values_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
       /* get, modify, put */
       GLuint temp[MAX_WIDTH], i;
       dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = (temp[i] & 0xffffff00) | src[i];
+      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (temp[i] & 0xffffff00) | src[i];
+            }
+         }
+      }
+      else {
+         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+         for (i = 0; i < count; i++) {
+            if (!mask || mask[i]) {
+               temp[i] = (temp[i] & 0xffffff) | (src[i] << 24);
+            }
          }
       }
       dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
@@ -446,9 +606,19 @@ put_mono_values_s8(GLcontext *ctx, struct gl_renderbuffer *s8rb, GLuint count,
    const GLubyte val = *((GLubyte *) value);
    /* get, modify, put */
    dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   for (i = 0; i < count; i++) {
-      if (!mask || mask[i]) {
-         temp[i] = (temp[i] & 0xffffff) | val;
+   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
+      for (i = 0; i < count; i++) {
+         if (!mask || mask[i]) {
+            temp[i] = (temp[i] & 0xffffff00) | val;
+         }
+      }
+   }
+   else {
+      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
+      for (i = 0; i < count; i++) {
+         if (!mask || mask[i]) {
+            temp[i] = (temp[i] & 0xffffff) | (val << 24);
+         }
       }
    }
    dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
@@ -465,7 +635,8 @@ _mesa_new_s8_renderbuffer_wrapper(GLcontext *ctx, struct gl_renderbuffer *dsrb)
 {
    struct gl_renderbuffer *s8rb;
 
-   ASSERT(dsrb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
+   ASSERT(dsrb->Format == MESA_FORMAT_Z24_S8 ||
+          dsrb->Format == MESA_FORMAT_S8_Z24);
    ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
 
    s8rb = _mesa_new_renderbuffer(ctx, 0);
@@ -478,10 +649,9 @@ _mesa_new_s8_renderbuffer_wrapper(GLcontext *ctx, struct gl_renderbuffer *dsrb)
    s8rb->Width = dsrb->Width;
    s8rb->Height = dsrb->Height;
    s8rb->InternalFormat = GL_STENCIL_INDEX8_EXT;
-   s8rb->_ActualFormat = GL_STENCIL_INDEX8_EXT;
+   s8rb->Format = MESA_FORMAT_S8;
    s8rb->_BaseFormat = GL_STENCIL_INDEX;
    s8rb->DataType = GL_UNSIGNED_BYTE;
-   s8rb->StencilBits = 8;
    s8rb->Data = NULL;
    s8rb->Delete = delete_wrapper;
    s8rb->AllocStorage = alloc_wrapper_storage;
@@ -528,10 +698,10 @@ _mesa_extract_stencil(GLcontext *ctx,
    ASSERT(dsRb);
    ASSERT(stencilRb);
 
-   ASSERT(dsRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
+   ASSERT(dsRb->Format == MESA_FORMAT_Z24_S8);
    ASSERT(dsRb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-   ASSERT(stencilRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT ||
-          stencilRb->_ActualFormat == GL_STENCIL_INDEX8_EXT);
+   ASSERT(stencilRb->Format == MESA_FORMAT_Z24_S8 ||
+          stencilRb->Format == MESA_FORMAT_S8);
    ASSERT(dsRb->Width == stencilRb->Width);
    ASSERT(dsRb->Height == stencilRb->Height);
 
@@ -541,7 +711,7 @@ _mesa_extract_stencil(GLcontext *ctx,
    for (row = 0; row < height; row++) {
       GLuint depthStencil[MAX_WIDTH];
       dsRb->GetRow(ctx, dsRb, width, 0, row, depthStencil);
-      if (stencilRb->_ActualFormat == GL_STENCIL_INDEX8_EXT) {
+      if (stencilRb->Format == MESA_FORMAT_S8) {
          /* 8bpp stencil */
          GLubyte stencil[MAX_WIDTH];
          GLuint i;
@@ -553,7 +723,7 @@ _mesa_extract_stencil(GLcontext *ctx,
       else {
          /* 32bpp stencil */
          /* the 24 depth bits will be ignored */
-         ASSERT(stencilRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
+         ASSERT(stencilRb->Format == MESA_FORMAT_Z24_S8);
          ASSERT(stencilRb->DataType == GL_UNSIGNED_INT_24_8_EXT);
          stencilRb->PutRow(ctx, stencilRb, width, 0, row, depthStencil, NULL);
       }
@@ -577,10 +747,10 @@ _mesa_insert_stencil(GLcontext *ctx,
    ASSERT(dsRb);
    ASSERT(stencilRb);
 
-   ASSERT(dsRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
+   ASSERT(dsRb->Format == MESA_FORMAT_Z24_S8);
    ASSERT(dsRb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-   ASSERT(stencilRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT ||
-          stencilRb->_ActualFormat == GL_STENCIL_INDEX8_EXT);
+   ASSERT(stencilRb->Format == MESA_FORMAT_Z24_S8 ||
+          stencilRb->Format == MESA_FORMAT_S8);
 
    ASSERT(dsRb->Width == stencilRb->Width);
    ASSERT(dsRb->Height == stencilRb->Height);
@@ -593,7 +763,7 @@ _mesa_insert_stencil(GLcontext *ctx,
 
       dsRb->GetRow(ctx, dsRb, width, 0, row, depthStencil);
 
-      if (stencilRb->_ActualFormat == GL_STENCIL_INDEX8_EXT) {
+      if (stencilRb->Format == MESA_FORMAT_S8) {
          /* 8bpp stencil */
          GLubyte stencil[MAX_WIDTH];
          GLuint i;
@@ -605,7 +775,7 @@ _mesa_insert_stencil(GLcontext *ctx,
       else {
          /* 32bpp stencil buffer */
          GLuint stencil[MAX_WIDTH], i;
-         ASSERT(stencilRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT);
+         ASSERT(stencilRb->Format == MESA_FORMAT_Z24_S8);
          ASSERT(stencilRb->DataType == GL_UNSIGNED_INT_24_8_EXT);
          stencilRb->GetRow(ctx, stencilRb, width, 0, row, stencil);
          for (i = 0; i < width; i++) {
@@ -631,7 +801,7 @@ _mesa_promote_stencil(GLcontext *ctx, struct gl_renderbuffer *stencilRb)
    GLubyte *data;
    GLint i, j, k;
 
-   ASSERT(stencilRb->_ActualFormat == GL_STENCIL_INDEX8_EXT);
+   ASSERT(stencilRb->Format == MESA_FORMAT_S8);
    ASSERT(stencilRb->Data);
 
    data = (GLubyte *) stencilRb->Data;
@@ -650,6 +820,4 @@ _mesa_promote_stencil(GLcontext *ctx, struct gl_renderbuffer *stencilRb)
       stencilRb->PutRow(ctx, stencilRb, width, 0, i, depthStencil, NULL);
    }
    _mesa_free(data);
-
-   stencilRb->_BaseFormat = GL_DEPTH_STENCIL_EXT;
 }
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 6610725de8..c2b7458f57 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -48,7 +48,7 @@
 
 
 /** Set this to 1 to help debug FBO incompleteness problems */
-#define DEBUG_FBO 0
+#define DEBUG_FBO 1
 
 
 /**
@@ -416,10 +416,9 @@ test_attachment_completeness(const GLcontext *ctx, GLenum format,
       }
       else {
          ASSERT(format == GL_STENCIL);
-         ASSERT(att->Renderbuffer->StencilBits);
          if (ctx->Extensions.EXT_packed_depth_stencil &&
              ctx->Extensions.ARB_depth_texture &&
-             att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
+             baseFormat == GL_DEPTH_STENCIL_EXT) {
             /* OK */
          }
          else {
@@ -431,6 +430,9 @@ test_attachment_completeness(const GLcontext *ctx, GLenum format,
       }
    }
    else if (att->Type == GL_RENDERBUFFER_EXT) {
+      const GLenum baseFormat =
+         _mesa_get_format_base_format(att->Renderbuffer->Format);
+
       ASSERT(att->Renderbuffer);
       if (!att->Renderbuffer->InternalFormat ||
           att->Renderbuffer->Width < 1 ||
@@ -440,24 +442,19 @@ test_attachment_completeness(const GLcontext *ctx, GLenum format,
          return;
       }
       if (format == GL_COLOR) {
-         if (att->Renderbuffer->_BaseFormat != GL_RGB &&
-             att->Renderbuffer->_BaseFormat != GL_RGBA) {
+         if (baseFormat != GL_RGB &&
+             baseFormat != GL_RGBA) {
             att_incomplete("bad renderbuffer color format");
             att->Complete = GL_FALSE;
             return;
          }
-         ASSERT(att->Renderbuffer->RedBits);
-         ASSERT(att->Renderbuffer->GreenBits);
-         ASSERT(att->Renderbuffer->BlueBits);
       }
       else if (format == GL_DEPTH) {
-         if (att->Renderbuffer->_BaseFormat == GL_DEPTH_COMPONENT) {
-            ASSERT(att->Renderbuffer->DepthBits);
+         if (baseFormat == GL_DEPTH_COMPONENT) {
             /* OK */
          }
          else if (ctx->Extensions.EXT_packed_depth_stencil &&
-                  att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
-            ASSERT(att->Renderbuffer->DepthBits);
+                  baseFormat == GL_DEPTH_STENCIL_EXT) {
             /* OK */
          }
          else {
@@ -468,13 +465,11 @@ test_attachment_completeness(const GLcontext *ctx, GLenum format,
       }
       else {
          assert(format == GL_STENCIL);
-         if (att->Renderbuffer->_BaseFormat == GL_STENCIL_INDEX) {
-            ASSERT(att->Renderbuffer->StencilBits);
+         if (baseFormat == GL_STENCIL_INDEX) {
             /* OK */
          }
          else if (ctx->Extensions.EXT_packed_depth_stencil &&
-                  att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
-            ASSERT(att->Renderbuffer->StencilBits);
+                  baseFormat == GL_DEPTH_STENCIL_EXT) {
             /* OK */
          }
          else {
@@ -980,42 +975,27 @@ renderbuffer_storage(GLenum target, GLenum internalFormat,
    }
 
    /* These MUST get set by the AllocStorage func */
-   rb->_ActualFormat = 0;
-   rb->RedBits =
-   rb->GreenBits =
-   rb->BlueBits =
-   rb->AlphaBits =
-   rb->IndexBits =
-   rb->DepthBits =
-   rb->StencilBits = 0;
+   rb->Format = MESA_FORMAT_NONE;
    rb->NumSamples = samples;
 
    /* Now allocate the storage */
    ASSERT(rb->AllocStorage);
    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
       /* No error - check/set fields now */
-      assert(rb->_ActualFormat);
+      assert(rb->Format != MESA_FORMAT_NONE);
       assert(rb->Width == (GLuint) width);
       assert(rb->Height == (GLuint) height);
-      assert(rb->RedBits || rb->GreenBits || rb->BlueBits || rb->AlphaBits ||
-             rb->DepthBits || rb->StencilBits || rb->IndexBits);
       rb->InternalFormat = internalFormat;
-      rb->_BaseFormat = baseFormat;
+      rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
+      assert(rb->_BaseFormat != 0);
    }
    else {
       /* Probably ran out of memory - clear the fields */
       rb->Width = 0;
       rb->Height = 0;
+      rb->Format = MESA_FORMAT_NONE;
       rb->InternalFormat = GL_NONE;
-      rb->_ActualFormat = GL_NONE;
       rb->_BaseFormat = GL_NONE;
-      rb->RedBits =
-      rb->GreenBits =
-      rb->BlueBits =
-      rb->AlphaBits =
-      rb->IndexBits =
-      rb->DepthBits =
-      rb->StencilBits =
       rb->NumSamples = 0;
    }
 
@@ -1028,6 +1008,53 @@ renderbuffer_storage(GLenum target, GLenum internalFormat,
 }
 
 
+/**
+ * Helper function for _mesa_GetRenderbufferParameterivEXT() and
+ * _mesa_GetFramebufferAttachmentParameterivEXT()
+ * We have to be careful to respect the base format.  For example, if a
+ * renderbuffer/texture was created with internalFormat=GL_RGB but the
+ * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
+ * we need to return zero.
+ */
+static GLint
+get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
+{
+   switch (pname) {
+   case GL_RENDERBUFFER_RED_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
+   case GL_RENDERBUFFER_GREEN_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
+   case GL_RENDERBUFFER_BLUE_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
+      if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
+      if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
+      if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
+      if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   default:
+      return 0;
+   }
+}
+
+
+
 void GLAPIENTRY
 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
                              GLsizei width, GLsizei height)
@@ -1084,22 +1111,12 @@ _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
       *params = rb->InternalFormat;
       return;
    case GL_RENDERBUFFER_RED_SIZE_EXT:
-      *params = rb->RedBits;
-      break;
    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
-      *params = rb->GreenBits;
-      break;
    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
-      *params = rb->BlueBits;
-      break;
    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
-      *params = rb->AlphaBits;
-      break;
    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
-      *params = rb->DepthBits;
-      break;
    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
-      *params = rb->StencilBits;
+      *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
       break;
    case GL_RENDERBUFFER_SAMPLES:
       if (ctx->Extensions.ARB_framebuffer_object) {
@@ -1706,7 +1723,9 @@ _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
 
    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
       /* make sure the renderbuffer is a depth/stencil format */
-      if (rb->_BaseFormat != GL_DEPTH_STENCIL) {
+      const GLenum baseFormat =
+         _mesa_get_format_base_format(att->Renderbuffer->Format);
+      if (baseFormat != GL_DEPTH_STENCIL) {
          _mesa_error(ctx, GL_INVALID_OPERATION,
                      "glFramebufferRenderbufferEXT(renderbuffer"
                      " is not DEPTH_STENCIL format)");
@@ -1862,7 +1881,7 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
                      "glGetFramebufferAttachmentParameterivEXT(pname)");
       }
       else {
-         *params = att->Renderbuffer->ColorEncoding;
+         *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
       }
       return;
    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
@@ -1872,61 +1891,44 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
          return;
       }
       else {
-         *params = att->Renderbuffer->ComponentType;
+         gl_format format = att->Renderbuffer->Format;
+         if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
+            /* special cases */
+            *params = GL_INDEX;
+         }
+         else {
+            *params = _mesa_get_format_datatype(format);
+         }
       }
       return;
    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
-      if (!ctx->Extensions.ARB_framebuffer_object) {
-         _mesa_error(ctx, GL_INVALID_ENUM,
-                     "glGetFramebufferAttachmentParameterivEXT(pname)");
-      }
-      else {
-         *params = att->Renderbuffer->RedBits;
-      }
-      return;
    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
-      if (!ctx->Extensions.ARB_framebuffer_object) {
-         _mesa_error(ctx, GL_INVALID_ENUM,
-                     "glGetFramebufferAttachmentParameterivEXT(pname)");
-      }
-      else {
-         *params = att->Renderbuffer->GreenBits;
-      }
-      return;
    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
-      if (!ctx->Extensions.ARB_framebuffer_object) {
-         _mesa_error(ctx, GL_INVALID_ENUM,
-                     "glGetFramebufferAttachmentParameterivEXT(pname)");
-      }
-      else {
-         *params = att->Renderbuffer->BlueBits;
-      }
-      return;
    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
-      if (!ctx->Extensions.ARB_framebuffer_object) {
-         _mesa_error(ctx, GL_INVALID_ENUM,
-                     "glGetFramebufferAttachmentParameterivEXT(pname)");
-      }
-      else {
-         *params = att->Renderbuffer->AlphaBits;
-      }
-      return;
    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
+   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
       if (!ctx->Extensions.ARB_framebuffer_object) {
          _mesa_error(ctx, GL_INVALID_ENUM,
                      "glGetFramebufferAttachmentParameterivEXT(pname)");
       }
-      else {
-         *params = att->Renderbuffer->DepthBits;
+      else if (att->Texture) {
+         const struct gl_texture_image *texImage =
+            _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
+                                   att->TextureLevel);
+         if (texImage) {
+            *params = get_component_bits(pname, texImage->_BaseFormat,
+                                         texImage->TexFormat);
+         }
+         else {
+            *params = 0;
+         }
       }
-      return;
-   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
-      if (!ctx->Extensions.ARB_framebuffer_object) {
-         _mesa_error(ctx, GL_INVALID_ENUM,
-                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      else if (att->Renderbuffer) {
+         *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
+                                      att->Renderbuffer->Format);
       }
       else {
-         *params = att->Renderbuffer->StencilBits;
+         *params = 0;
       }
       return;
    default:
@@ -2053,7 +2055,8 @@ _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
       if (!readRb ||
           !drawRb ||
-          readRb->StencilBits != drawRb->StencilBits) {
+          _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) != 
+          _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
          _mesa_error(ctx, GL_INVALID_OPERATION,
                      "glBlitFramebufferEXT(stencil buffer size mismatch");
          return;
@@ -2065,7 +2068,8 @@ _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
       if (!readRb ||
           !drawRb ||
-          readRb->DepthBits != drawRb->DepthBits) {
+          _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) != 
+          _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
          _mesa_error(ctx, GL_INVALID_OPERATION,
                      "glBlitFramebufferEXT(depth buffer size mismatch");
          return;
@@ -2093,7 +2097,7 @@ _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
       /* color formats must match */
       if (colorReadRb &&
           colorDrawRb &&
-          colorReadRb->_ActualFormat != colorDrawRb->_ActualFormat) {
+          colorReadRb->Format != colorDrawRb->Format) {
          _mesa_error(ctx, GL_INVALID_OPERATION,
                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
          return;
diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index dc79b8ca61..154dedacd5 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -35,6 +35,7 @@
 #include "buffers.h"
 #include "context.h"
 #include "depthstencil.h"
+#include "formats.h"
 #include "macros.h"
 #include "mtypes.h"
 #include "fbobject.h"
@@ -281,7 +282,6 @@ _mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb,
          struct gl_renderbuffer *rb = att->Renderbuffer;
          /* only resize if size is changing */
          if (rb->Width != width || rb->Height != height) {
-            /* could just as well pass rb->_ActualFormat here */
             if (rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height)) {
                ASSERT(rb->Width == width);
                ASSERT(rb->Height == height);
@@ -523,19 +523,22 @@ _mesa_update_framebuffer_visual(struct gl_framebuffer *fb)
    for (i = 0; i < BUFFER_COUNT; i++) {
       if (fb->Attachment[i].Renderbuffer) {
          const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
-         if (rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB) {
-            fb->Visual.redBits = rb->RedBits;
-            fb->Visual.greenBits = rb->GreenBits;
-            fb->Visual.blueBits = rb->BlueBits;
-            fb->Visual.alphaBits = rb->AlphaBits;
+         const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
+         const gl_format fmt = rb->Format;
+         
+         if (baseFormat == GL_RGBA || baseFormat == GL_RGB) {
+            fb->Visual.redBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
+            fb->Visual.greenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
+            fb->Visual.blueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
+            fb->Visual.alphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
             fb->Visual.rgbBits = fb->Visual.redBits
                + fb->Visual.greenBits + fb->Visual.blueBits;
             fb->Visual.floatMode = GL_FALSE;
             fb->Visual.samples = rb->NumSamples;
             break;
          }
-         else if (rb->_BaseFormat == GL_COLOR_INDEX) {
-            fb->Visual.indexBits = rb->IndexBits;
+         else if (baseFormat == GL_COLOR_INDEX) {
+            fb->Visual.indexBits = _mesa_get_format_bits(fmt, GL_INDEX_BITS);
             fb->Visual.rgbMode = GL_FALSE;
             break;
          }
@@ -543,27 +546,30 @@ _mesa_update_framebuffer_visual(struct gl_framebuffer *fb)
    }
 
    if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {
+      const struct gl_renderbuffer *rb =
+         fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+      const gl_format fmt = rb->Format;
       fb->Visual.haveDepthBuffer = GL_TRUE;
-      fb->Visual.depthBits
-         = fb->Attachment[BUFFER_DEPTH].Renderbuffer->DepthBits;
+      fb->Visual.depthBits = _mesa_get_format_bits(fmt, GL_DEPTH_BITS);
    }
 
    if (fb->Attachment[BUFFER_STENCIL].Renderbuffer) {
+      const struct gl_renderbuffer *rb =
+         fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+      const gl_format fmt = rb->Format;
       fb->Visual.haveStencilBuffer = GL_TRUE;
-      fb->Visual.stencilBits
-         = fb->Attachment[BUFFER_STENCIL].Renderbuffer->StencilBits;
+      fb->Visual.stencilBits = _mesa_get_format_bits(fmt, GL_STENCIL_BITS);
    }
 
    if (fb->Attachment[BUFFER_ACCUM].Renderbuffer) {
+      const struct gl_renderbuffer *rb =
+         fb->Attachment[BUFFER_ACCUM].Renderbuffer;
+      const gl_format fmt = rb->Format;
       fb->Visual.haveAccumBuffer = GL_TRUE;
-      fb->Visual.accumRedBits
-         = fb->Attachment[BUFFER_ACCUM].Renderbuffer->RedBits;
-      fb->Visual.accumGreenBits
-         = fb->Attachment[BUFFER_ACCUM].Renderbuffer->GreenBits;
-      fb->Visual.accumBlueBits
-         = fb->Attachment[BUFFER_ACCUM].Renderbuffer->BlueBits;
-      fb->Visual.accumAlphaBits
-         = fb->Attachment[BUFFER_ACCUM].Renderbuffer->AlphaBits;
+      fb->Visual.accumRedBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
+      fb->Visual.accumGreenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
+      fb->Visual.accumBlueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
+      fb->Visual.accumAlphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
    }
 
    compute_depth_max(fb);
@@ -592,11 +598,11 @@ _mesa_update_depth_buffer(GLcontext *ctx,
 
    depthRb = fb->Attachment[attIndex].Renderbuffer;
 
-   if (depthRb && depthRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT) {
+   if (depthRb && depthRb->_BaseFormat == GL_DEPTH_STENCIL) {
       /* The attached depth buffer is a GL_DEPTH_STENCIL renderbuffer */
       if (!fb->_DepthBuffer
           || fb->_DepthBuffer->Wrapped != depthRb
-          || fb->_DepthBuffer->_BaseFormat != GL_DEPTH_COMPONENT) {
+          || _mesa_get_format_base_format(fb->_DepthBuffer->Format) != GL_DEPTH_COMPONENT) {
          /* need to update wrapper */
          struct gl_renderbuffer *wrapper
             = _mesa_new_z24_renderbuffer_wrapper(ctx, depthRb);
@@ -633,11 +639,11 @@ _mesa_update_stencil_buffer(GLcontext *ctx,
 
    stencilRb = fb->Attachment[attIndex].Renderbuffer;
 
-   if (stencilRb && stencilRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT) {
+   if (stencilRb && stencilRb->_BaseFormat == GL_DEPTH_STENCIL) {
       /* The attached stencil buffer is a GL_DEPTH_STENCIL renderbuffer */
       if (!fb->_StencilBuffer
           || fb->_StencilBuffer->Wrapped != stencilRb
-          || fb->_StencilBuffer->_BaseFormat != GL_STENCIL_INDEX) {
+          || _mesa_get_format_base_format(fb->_StencilBuffer->Format) != GL_STENCIL_INDEX) {
          /* need to update wrapper */
          struct gl_renderbuffer *wrapper
             = _mesa_new_s8_renderbuffer_wrapper(ctx, stencilRb);
@@ -854,30 +860,32 @@ _mesa_source_buffer_exists(GLcontext *ctx, GLenum format)
       if (ctx->ReadBuffer->_ColorReadBuffer == NULL) {
          return GL_FALSE;
       }
-      ASSERT(ctx->ReadBuffer->_ColorReadBuffer->RedBits > 0 ||
-             ctx->ReadBuffer->_ColorReadBuffer->IndexBits > 0);
+      ASSERT(_mesa_get_format_bits(ctx->ReadBuffer->_ColorReadBuffer->Format, GL_RED_BITS) > 0 ||
+             _mesa_get_format_bits(ctx->ReadBuffer->_ColorReadBuffer->Format, GL_INDEX_BITS) > 0);
       break;
    case GL_DEPTH:
    case GL_DEPTH_COMPONENT:
       if (!att[BUFFER_DEPTH].Renderbuffer) {
          return GL_FALSE;
       }
-      ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
+      /*ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);*/
       break;
    case GL_STENCIL:
    case GL_STENCIL_INDEX:
       if (!att[BUFFER_STENCIL].Renderbuffer) {
          return GL_FALSE;
       }
-      ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+      /*ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);*/
       break;
    case GL_DEPTH_STENCIL_EXT:
       if (!att[BUFFER_DEPTH].Renderbuffer ||
           !att[BUFFER_STENCIL].Renderbuffer) {
          return GL_FALSE;
       }
+      /*
       ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
       ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+      */
       break;
    default:
       _mesa_problem(ctx,
@@ -932,22 +940,24 @@ _mesa_dest_buffer_exists(GLcontext *ctx, GLenum format)
       if (!att[BUFFER_DEPTH].Renderbuffer) {
          return GL_FALSE;
       }
-      ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
+      /*ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);*/
       break;
    case GL_STENCIL:
    case GL_STENCIL_INDEX:
       if (!att[BUFFER_STENCIL].Renderbuffer) {
          return GL_FALSE;
       }
-      ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+      /*ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);*/
       break;
    case GL_DEPTH_STENCIL_EXT:
       if (!att[BUFFER_DEPTH].Renderbuffer ||
           !att[BUFFER_STENCIL].Renderbuffer) {
          return GL_FALSE;
       }
+      /*
       ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
       ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+      */
       break;
    default:
       _mesa_problem(ctx,
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 8e6e0d09be..5bbb12ea70 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2089,19 +2089,9 @@ struct gl_renderbuffer
    GLint RefCount;
    GLuint Width, Height;
    GLenum InternalFormat; /**< The user-specified format */
-   GLenum _ActualFormat;  /**< The driver-chosen format */
    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
                                GL_STENCIL_INDEX. */
-   GLenum ColorEncoding; /**< GL_LINEAR or GL_SRGB */
-   GLenum ComponentType; /**< GL_FLOAT, GL_INT, GL_UNSIGNED_INT,
-                              GL_UNSIGNED_NORMALIZED or GL_INDEX */
-   GLubyte RedBits;      /**< Bits of red per pixel */
-   GLubyte GreenBits;
-   GLubyte BlueBits;
-   GLubyte AlphaBits;
-   GLubyte IndexBits;
-   GLubyte DepthBits;
-   GLubyte StencilBits;
+   GLuint Format;         /**< The actual format: MESA_FORMAT_x */
    GLubyte NumSamples;
 
    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
diff --git a/src/mesa/main/rbadaptors.c b/src/mesa/main/rbadaptors.c
index c1ac0606c8..1060c5796e 100644
--- a/src/mesa/main/rbadaptors.c
+++ b/src/mesa/main/rbadaptors.c
@@ -218,14 +218,10 @@ _mesa_new_renderbuffer_16wrap8(GLcontext *ctx, struct gl_renderbuffer *rb8)
       _glthread_UNLOCK_MUTEX(rb8->Mutex);
 
       rb16->InternalFormat = rb8->InternalFormat;
-      rb16->_ActualFormat = rb8->_ActualFormat;
+      rb16->Format = rb8->Format; /* XXX is this right? */
       rb16->_BaseFormat = rb8->_BaseFormat;
       rb16->DataType = GL_UNSIGNED_SHORT;
       /* Note: passing through underlying bits/channel */
-      rb16->RedBits = rb8->RedBits;
-      rb16->GreenBits = rb8->GreenBits;
-      rb16->BlueBits = rb8->BlueBits;
-      rb16->AlphaBits = rb8->AlphaBits;
       rb16->Wrapped = rb8;
 
       rb16->AllocStorage = AllocStorage_wrapper;
@@ -385,14 +381,10 @@ _mesa_new_renderbuffer_32wrap8(GLcontext *ctx, struct gl_renderbuffer *rb8)
       _glthread_UNLOCK_MUTEX(rb8->Mutex);
 
       rb32->InternalFormat = rb8->InternalFormat;
-      rb32->_ActualFormat = rb8->_ActualFormat;
+      rb32->Format = rb8->Format;  /* XXX is this right? */
       rb32->_BaseFormat = rb8->_BaseFormat;
       rb32->DataType = GL_FLOAT;
       /* Note: passing through underlying bits/channel */
-      rb32->RedBits = rb8->RedBits;
-      rb32->GreenBits = rb8->GreenBits;
-      rb32->BlueBits = rb8->BlueBits;
-      rb32->AlphaBits = rb8->AlphaBits;
       rb32->Wrapped = rb8;
 
       rb32->AllocStorage = AllocStorage_wrapper;
@@ -552,14 +544,10 @@ _mesa_new_renderbuffer_32wrap16(GLcontext *ctx, struct gl_renderbuffer *rb16)
       _glthread_UNLOCK_MUTEX(rb16->Mutex);
 
       rb32->InternalFormat = rb16->InternalFormat;
-      rb32->_ActualFormat = rb16->_ActualFormat;
+      rb32->Format = rb16->Format;  /* XXX is this right? */
       rb32->_BaseFormat = rb16->_BaseFormat;
       rb32->DataType = GL_FLOAT;
       /* Note: passing through underlying bits/channel */
-      rb32->RedBits = rb16->RedBits;
-      rb32->GreenBits = rb16->GreenBits;
-      rb32->BlueBits = rb16->BlueBits;
-      rb32->AlphaBits = rb16->AlphaBits;
       rb32->Wrapped = rb16;
 
       rb32->AllocStorage = AllocStorage_wrapper;
diff --git a/src/mesa/main/renderbuffer.c b/src/mesa/main/renderbuffer.c
index 38be8266e0..409fd8634a 100644
--- a/src/mesa/main/renderbuffer.c
+++ b/src/mesa/main/renderbuffer.c
@@ -43,6 +43,8 @@
 #include "glheader.h"
 #include "imports.h"
 #include "context.h"
+#include "fbobject.h"
+#include "formats.h"
 #include "mtypes.h"
 #include "fbobject.h"
 #include "renderbuffer.h"
@@ -72,7 +74,7 @@ get_pointer_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb,
    if (!rb->Data)
       return NULL;
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   /* Can't assert _ActualFormat since these funcs may be used for serveral
+   /* Can't assert rb->Format since these funcs may be used for serveral
     * different formats (GL_ALPHA8, GL_STENCIL_INDEX8, etc).
     */
    return (GLubyte *) rb->Data + y * rb->Width + x;
@@ -448,7 +450,7 @@ static void *
 get_pointer_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb,
                    GLint x, GLint y)
 {
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    /* No direct access since this buffer is RGB but caller will be
     * treating it as if it were RGBA.
     */
@@ -463,7 +465,7 @@ get_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    const GLubyte *src = (const GLubyte *) rb->Data + 3 * (y * rb->Width + x);
    GLubyte *dst = (GLubyte *) values;
    GLuint i;
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
    for (i = 0; i < count; i++) {
       dst[i * 4 + 0] = src[i * 3 + 0];
@@ -480,7 +482,7 @@ get_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
 {
    GLubyte *dst = (GLubyte *) values;
    GLuint i;
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
    for (i = 0; i < count; i++) {
       const GLubyte *src
@@ -501,7 +503,7 @@ put_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    const GLubyte *src = (const GLubyte *) values;
    GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x);
    GLuint i;
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
    for (i = 0; i < count; i++) {
       if (!mask || mask[i]) {
@@ -521,7 +523,7 @@ put_row_rgb_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    const GLubyte *src = (const GLubyte *) values;
    GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x);
    GLuint i;
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
    for (i = 0; i < count; i++) {
       if (!mask || mask[i]) {
@@ -542,7 +544,7 @@ put_mono_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    const GLubyte val1 = ((const GLubyte *) value)[1];
    const GLubyte val2 = ((const GLubyte *) value)[2];
    GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x);
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
    if (!mask && val0 == val1 && val1 == val2) {
       /* optimized case */
@@ -569,7 +571,7 @@ put_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    /* note: incoming values are RGB+A! */
    const GLubyte *src = (const GLubyte *) values;
    GLuint i;
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
    for (i = 0; i < count; i++) {
       if (!mask || mask[i]) {
@@ -592,7 +594,7 @@ put_mono_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb,
    const GLubyte val1 = ((const GLubyte *) value)[1];
    const GLubyte val2 = ((const GLubyte *) value)[2];
    GLuint i;
-   ASSERT(rb->_ActualFormat == GL_RGB8);
+   ASSERT(rb->Format == MESA_FORMAT_RGB888);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
    for (i = 0; i < count; i++) {
       if (!mask || mask[i]) {
@@ -617,7 +619,7 @@ get_pointer_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb,
    if (!rb->Data)
       return NULL;
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    return (GLubyte *) rb->Data + 4 * (y * rb->Width + x);
 }
 
@@ -628,7 +630,7 @@ get_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
 {
    const GLubyte *src = (const GLubyte *) rb->Data + 4 * (y * rb->Width + x);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    _mesa_memcpy(values, src, 4 * count * sizeof(GLubyte));
 }
 
@@ -641,7 +643,7 @@ get_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    GLuint *dst = (GLuint *) values;
    GLuint i;
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    for (i = 0; i < count; i++) {
       const GLuint *src = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]);
       dst[i] = *src;
@@ -657,7 +659,7 @@ put_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    const GLuint *src = (const GLuint *) values;
    GLuint *dst = (GLuint *) rb->Data + (y * rb->Width + x);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    if (mask) {
       GLuint i;
       for (i = 0; i < count; i++) {
@@ -681,7 +683,7 @@ put_row_rgb_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    GLubyte *dst = (GLubyte *) rb->Data + 4 * (y * rb->Width + x);
    GLuint i;
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    for (i = 0; i < count; i++) {
       if (!mask || mask[i]) {
          dst[i * 4 + 0] = src[i * 3 + 0];
@@ -701,7 +703,7 @@ put_mono_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    const GLuint val = *((const GLuint *) value);
    GLuint *dst = (GLuint *) rb->Data + (y * rb->Width + x);
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    if (!mask && val == 0) {
       /* common case */
       _mesa_bzero(dst, count * 4 * sizeof(GLubyte));
@@ -735,7 +737,7 @@ put_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
    const GLuint *src = (const GLuint *) values;
    GLuint i;
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    for (i = 0; i < count; i++) {
       if (!mask || mask[i]) {
          GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]);
@@ -754,7 +756,7 @@ put_mono_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb,
    const GLuint val = *((const GLuint *) value);
    GLuint i;
    ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(rb->_ActualFormat == GL_RGBA8);
+   ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
    for (i = 0; i < count; i++) {
       if (!mask || mask[i]) {
          GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]);
@@ -947,15 +949,6 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 {
    GLuint pixelSize;
 
-   /* first clear these fields */
-   rb->RedBits =
-   rb->GreenBits =
-   rb->BlueBits =
-   rb->AlphaBits =
-   rb->IndexBits =
-   rb->DepthBits =
-   rb->StencilBits = 0;
-
    switch (internalFormat) {
    case GL_RGB:
    case GL_R3_G3_B2:
@@ -965,8 +958,7 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
    case GL_RGB10:
    case GL_RGB12:
    case GL_RGB16:
-      rb->_ActualFormat = GL_RGB8;
-      rb->_BaseFormat = GL_RGB;
+      rb->Format = MESA_FORMAT_RGB888;
       rb->DataType = GL_UNSIGNED_BYTE;
       rb->GetPointer = get_pointer_ubyte3;
       rb->GetRow = get_row_ubyte3;
@@ -976,10 +968,6 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_ubyte3;
       rb->PutValues = put_values_ubyte3;
       rb->PutMonoValues = put_mono_values_ubyte3;
-      rb->RedBits   = 8 * sizeof(GLubyte);
-      rb->GreenBits = 8 * sizeof(GLubyte);
-      rb->BlueBits  = 8 * sizeof(GLubyte);
-      rb->AlphaBits = 0;
       pixelSize = 3 * sizeof(GLubyte);
       break;
    case GL_RGBA:
@@ -987,8 +975,11 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
    case GL_RGBA4:
    case GL_RGB5_A1:
    case GL_RGBA8:
-      rb->_ActualFormat = GL_RGBA8;
-      rb->_BaseFormat = GL_RGBA;
+#if 1
+   case GL_RGB10_A2:
+   case GL_RGBA12:
+#endif
+      rb->Format = MESA_FORMAT_RGBA8888;
       rb->DataType = GL_UNSIGNED_BYTE;
       rb->GetPointer = get_pointer_ubyte4;
       rb->GetRow = get_row_ubyte4;
@@ -998,18 +989,12 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_ubyte4;
       rb->PutValues = put_values_ubyte4;
       rb->PutMonoValues = put_mono_values_ubyte4;
-      rb->RedBits   = 8 * sizeof(GLubyte);
-      rb->GreenBits = 8 * sizeof(GLubyte);
-      rb->BlueBits  = 8 * sizeof(GLubyte);
-      rb->AlphaBits = 8 * sizeof(GLubyte);
       pixelSize = 4 * sizeof(GLubyte);
       break;
-   case GL_RGB10_A2:
-   case GL_RGBA12:
    case GL_RGBA16:
-      rb->_ActualFormat = GL_RGBA16;
-      rb->_BaseFormat = GL_RGBA;
-      rb->DataType = GL_UNSIGNED_SHORT;
+      /* for accum buffer */
+      rb->Format = MESA_FORMAT_SIGNED_RGBA_16;
+      rb->DataType = GL_SHORT;
       rb->GetPointer = get_pointer_ushort4;
       rb->GetRow = get_row_ushort4;
       rb->GetValues = get_values_ushort4;
@@ -1018,16 +1003,11 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_ushort4;
       rb->PutValues = put_values_ushort4;
       rb->PutMonoValues = put_mono_values_ushort4;
-      rb->RedBits   = 8 * sizeof(GLushort);
-      rb->GreenBits = 8 * sizeof(GLushort);
-      rb->BlueBits  = 8 * sizeof(GLushort);
-      rb->AlphaBits = 8 * sizeof(GLushort);
       pixelSize = 4 * sizeof(GLushort);
       break;
-#if 00
+#if 0
    case GL_ALPHA8:
-      rb->_ActualFormat = GL_ALPHA8;
-      rb->_BaseFormat = GL_RGBA; /* Yes, not GL_ALPHA! */
+      rb->Format = MESA_FORMAT_A8;
       rb->DataType = GL_UNSIGNED_BYTE;
       rb->GetPointer = get_pointer_alpha8;
       rb->GetRow = get_row_alpha8;
@@ -1037,10 +1017,6 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_alpha8;
       rb->PutValues = put_values_alpha8;
       rb->PutMonoValues = put_mono_values_alpha8;
-      rb->RedBits   = 0; /*red*/
-      rb->GreenBits = 0; /*green*/
-      rb->BlueBits  = 0; /*blue*/
-      rb->AlphaBits = 8 * sizeof(GLubyte);
       pixelSize = sizeof(GLubyte);
       break;
 #endif
@@ -1048,8 +1024,8 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
    case GL_STENCIL_INDEX1_EXT:
    case GL_STENCIL_INDEX4_EXT:
    case GL_STENCIL_INDEX8_EXT:
-      rb->_ActualFormat = GL_STENCIL_INDEX8_EXT;
-      rb->_BaseFormat = GL_STENCIL_INDEX;
+   case GL_STENCIL_INDEX16_EXT:
+      rb->Format = MESA_FORMAT_S8;
       rb->DataType = GL_UNSIGNED_BYTE;
       rb->GetPointer = get_pointer_ubyte;
       rb->GetRow = get_row_ubyte;
@@ -1059,28 +1035,11 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_ubyte;
       rb->PutValues = put_values_ubyte;
       rb->PutMonoValues = put_mono_values_ubyte;
-      rb->StencilBits = 8 * sizeof(GLubyte);
       pixelSize = sizeof(GLubyte);
       break;
-   case GL_STENCIL_INDEX16_EXT:
-      rb->_ActualFormat = GL_STENCIL_INDEX16_EXT;
-      rb->_BaseFormat = GL_STENCIL_INDEX;
-      rb->DataType = GL_UNSIGNED_SHORT;
-      rb->GetPointer = get_pointer_ushort;
-      rb->GetRow = get_row_ushort;
-      rb->GetValues = get_values_ushort;
-      rb->PutRow = put_row_ushort;
-      rb->PutRowRGB = NULL;
-      rb->PutMonoRow = put_mono_row_ushort;
-      rb->PutValues = put_values_ushort;
-      rb->PutMonoValues = put_mono_values_ushort;
-      rb->StencilBits = 8 * sizeof(GLushort);
-      pixelSize = sizeof(GLushort);
-      break;
    case GL_DEPTH_COMPONENT:
    case GL_DEPTH_COMPONENT16:
-      rb->_ActualFormat = GL_DEPTH_COMPONENT16;
-      rb->_BaseFormat = GL_DEPTH_COMPONENT;
+      rb->Format = MESA_FORMAT_Z16;
       rb->DataType = GL_UNSIGNED_SHORT;
       rb->GetPointer = get_pointer_ushort;
       rb->GetRow = get_row_ushort;
@@ -1090,12 +1049,10 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_ushort;
       rb->PutValues = put_values_ushort;
       rb->PutMonoValues = put_mono_values_ushort;
-      rb->DepthBits = 8 * sizeof(GLushort);
       pixelSize = sizeof(GLushort);
       break;
    case GL_DEPTH_COMPONENT24:
    case GL_DEPTH_COMPONENT32:
-      rb->_BaseFormat = GL_DEPTH_COMPONENT;
       rb->DataType = GL_UNSIGNED_INT;
       rb->GetPointer = get_pointer_uint;
       rb->GetRow = get_row_uint;
@@ -1105,20 +1062,12 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_uint;
       rb->PutValues = put_values_uint;
       rb->PutMonoValues = put_mono_values_uint;
-      if (internalFormat == GL_DEPTH_COMPONENT24) {
-         rb->_ActualFormat = GL_DEPTH_COMPONENT24;
-         rb->DepthBits = 24;
-      }
-      else {
-         rb->_ActualFormat = GL_DEPTH_COMPONENT32;
-         rb->DepthBits = 32;
-      }
+      rb->Format = MESA_FORMAT_Z32;
       pixelSize = sizeof(GLuint);
       break;
    case GL_DEPTH_STENCIL_EXT:
    case GL_DEPTH24_STENCIL8_EXT:
-      rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
-      rb->_BaseFormat = GL_DEPTH_STENCIL_EXT;
+      rb->Format = MESA_FORMAT_Z24_S8;
       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
       rb->GetPointer = get_pointer_uint;
       rb->GetRow = get_row_uint;
@@ -1128,13 +1077,12 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_uint;
       rb->PutValues = put_values_uint;
       rb->PutMonoValues = put_mono_values_uint;
-      rb->DepthBits = 24;
-      rb->StencilBits = 8;
       pixelSize = sizeof(GLuint);
       break;
    case GL_COLOR_INDEX8_EXT:
-      rb->_ActualFormat = GL_COLOR_INDEX8_EXT;
-      rb->_BaseFormat = GL_COLOR_INDEX;
+   case GL_COLOR_INDEX16_EXT:
+   case COLOR_INDEX32:
+      rb->Format = MESA_FORMAT_CI8;
       rb->DataType = GL_UNSIGNED_BYTE;
       rb->GetPointer = get_pointer_ubyte;
       rb->GetRow = get_row_ubyte;
@@ -1144,39 +1092,8 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       rb->PutMonoRow = put_mono_row_ubyte;
       rb->PutValues = put_values_ubyte;
       rb->PutMonoValues = put_mono_values_ubyte;
-      rb->IndexBits = 8 * sizeof(GLubyte);
       pixelSize = sizeof(GLubyte);
       break;
-   case GL_COLOR_INDEX16_EXT:
-      rb->_ActualFormat = GL_COLOR_INDEX16_EXT;
-      rb->_BaseFormat = GL_COLOR_INDEX;
-      rb->DataType = GL_UNSIGNED_SHORT;
-      rb->GetPointer = get_pointer_ushort;
-      rb->GetRow = get_row_ushort;
-      rb->GetValues = get_values_ushort;
-      rb->PutRow = put_row_ushort;
-      rb->PutRowRGB = NULL;
-      rb->PutMonoRow = put_mono_row_ushort;
-      rb->PutValues = put_values_ushort;
-      rb->PutMonoValues = put_mono_values_ushort;
-      rb->IndexBits = 8 * sizeof(GLushort);
-      pixelSize = sizeof(GLushort);
-      break;
-   case COLOR_INDEX32:
-      rb->_ActualFormat = COLOR_INDEX32;
-      rb->_BaseFormat = GL_COLOR_INDEX;
-      rb->DataType = GL_UNSIGNED_INT;
-      rb->GetPointer = get_pointer_uint;
-      rb->GetRow = get_row_uint;
-      rb->GetValues = get_values_uint;
-      rb->PutRow = put_row_uint;
-      rb->PutRowRGB = NULL;
-      rb->PutMonoRow = put_mono_row_uint;
-      rb->PutValues = put_values_uint;
-      rb->PutMonoValues = put_mono_values_uint;
-      rb->IndexBits = 8 * sizeof(GLuint);
-      pixelSize = sizeof(GLuint);
-      break;
    default:
       _mesa_problem(ctx, "Bad internalFormat in _mesa_soft_renderbuffer_storage");
       return GL_FALSE;
@@ -1213,6 +1130,7 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 
    rb->Width = width;
    rb->Height = height;
+   rb->_BaseFormat = _mesa_base_fbo_format(ctx, rb->InternalFormat);
 
    return GL_TRUE;
 }
@@ -1239,7 +1157,7 @@ alloc_storage_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb,
                      GLenum internalFormat, GLuint width, GLuint height)
 {
    ASSERT(arb != arb->Wrapped);
-   ASSERT(arb->_ActualFormat == GL_ALPHA8);
+   ASSERT(arb->Format == MESA_FORMAT_A8);
 
    /* first, pass the call to the wrapped RGB buffer */
    if (!arb->Wrapped->AllocStorage(ctx, arb->Wrapped, internalFormat,
@@ -1439,8 +1357,8 @@ put_mono_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb,
 static void
 copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src)
 {
-   ASSERT(dst->_ActualFormat == GL_ALPHA8);
-   ASSERT(src->_ActualFormat == GL_ALPHA8);
+   ASSERT(dst->Format == MESA_FORMAT_A8);
+   ASSERT(src->Format == MESA_FORMAT_A8);
    ASSERT(dst->Width == src->Width);
    ASSERT(dst->Height == src->Height);
 
@@ -1486,16 +1404,7 @@ _mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name)
    rb->Width = 0;
    rb->Height = 0;
    rb->InternalFormat = GL_NONE;
-   rb->_ActualFormat = GL_NONE;
-   rb->_BaseFormat = GL_NONE;
-
-   rb->ComponentType = GL_UNSIGNED_NORMALIZED; /* ARB_fbo */
-   rb->ColorEncoding = GL_LINEAR; /* ARB_fbo */
-
-   rb->RedBits = rb->GreenBits = rb->BlueBits = rb->AlphaBits = 0;
-   rb->IndexBits = 0;
-   rb->DepthBits = 0;
-   rb->StencilBits = 0;
+   rb->Format = MESA_FORMAT_NONE;
 
    rb->DataType = GL_NONE;
    rb->Data = NULL;
@@ -1612,18 +1521,15 @@ _mesa_add_color_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb,
 
       if (rgbBits <= 8) {
          if (alphaBits)
-            rb->_ActualFormat = GL_RGBA8;
+            rb->Format = MESA_FORMAT_RGBA8888;
          else
-            rb->_ActualFormat = GL_RGB8;
+            rb->Format = MESA_FORMAT_RGB888;
       }
       else {
          assert(rgbBits <= 16);
-         if (alphaBits)
-            rb->_ActualFormat = GL_RGBA16;
-         else
-            rb->_ActualFormat = GL_RGBA16; /* don't really have RGB16 yet */
+         rb->Format = MESA_FORMAT_NONE; /*XXX RGBA16;*/
       }
-      rb->InternalFormat = rb->_ActualFormat;
+      rb->InternalFormat = GL_RGBA;
 
       rb->AllocStorage = _mesa_soft_renderbuffer_storage;
       _mesa_add_renderbuffer(fb, b, rb);
@@ -1677,15 +1583,9 @@ _mesa_add_color_index_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb,
          return GL_FALSE;
       }
 
-      if (indexBits <= 8) {
-         /* only support GLuint for now */
-         /*rb->InternalFormat = GL_COLOR_INDEX8_EXT;*/
-         rb->_ActualFormat = COLOR_INDEX32;
-      }
-      else {
-         rb->_ActualFormat = COLOR_INDEX32;
-      }
-      rb->InternalFormat = rb->_ActualFormat;
+      assert(indexBits <= 8);
+      rb->Format = MESA_FORMAT_CI8;
+      rb->InternalFormat = GL_COLOR_INDEX;
 
       rb->AllocStorage = _mesa_soft_renderbuffer_storage;
       _mesa_add_renderbuffer(fb, b, rb);
@@ -1758,8 +1658,7 @@ _mesa_add_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb,
        * values.
        */
       arb->InternalFormat = arb->Wrapped->InternalFormat;
-      arb->_ActualFormat  = GL_ALPHA8;
-      arb->_BaseFormat    = arb->Wrapped->_BaseFormat;
+      arb->Format         = MESA_FORMAT_A8;
       arb->DataType       = arb->Wrapped->DataType;
       arb->AllocStorage   = alloc_storage_alpha8;
       arb->Delete         = delete_renderbuffer_alpha8;
@@ -1833,15 +1732,13 @@ _mesa_add_depth_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb,
    }
 
    if (depthBits <= 16) {
-      rb->_ActualFormat = GL_DEPTH_COMPONENT16;
-   }
-   else if (depthBits <= 24) {
-      rb->_ActualFormat = GL_DEPTH_COMPONENT24;
+      rb->Format = MESA_FORMAT_Z16;
+      rb->InternalFormat = GL_DEPTH_COMPONENT16;
    }
    else {
-      rb->_ActualFormat = GL_DEPTH_COMPONENT32;
+      rb->Format = MESA_FORMAT_Z32;
+      rb->InternalFormat = GL_DEPTH_COMPONENT32;
    }
-   rb->InternalFormat = rb->_ActualFormat;
 
    rb->AllocStorage = _mesa_soft_renderbuffer_storage;
    _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb);
@@ -1878,14 +1775,9 @@ _mesa_add_stencil_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb,
       return GL_FALSE;
    }
 
-   if (stencilBits <= 8) {
-      rb->_ActualFormat = GL_STENCIL_INDEX8_EXT;
-   }
-   else {
-      /* not really supported (see s_stencil.c code) */
-      rb->_ActualFormat = GL_STENCIL_INDEX16_EXT;
-   }
-   rb->InternalFormat = rb->_ActualFormat;
+   assert(stencilBits <= 8);
+   rb->Format = MESA_FORMAT_S8;
+   rb->InternalFormat = GL_STENCIL_INDEX8;
 
    rb->AllocStorage = _mesa_soft_renderbuffer_storage;
    _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb);
@@ -1923,7 +1815,7 @@ _mesa_add_accum_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb,
       return GL_FALSE;
    }
 
-   rb->_ActualFormat = GL_RGBA16;
+   rb->Format = MESA_FORMAT_SIGNED_RGBA_16;
    rb->InternalFormat = GL_RGBA16;
    rb->AllocStorage = _mesa_soft_renderbuffer_storage;
    _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb);
@@ -1967,13 +1859,9 @@ _mesa_add_aux_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb,
          return GL_FALSE;
       }
 
-      if (colorBits <= 8) {
-         rb->_ActualFormat = GL_RGBA8;
-      }
-      else {
-         rb->_ActualFormat = GL_RGBA16;
-      }
-      rb->InternalFormat = rb->_ActualFormat;
+      assert (colorBits <= 8);
+      rb->Format = MESA_FORMAT_RGBA8888;
+      rb->InternalFormat = GL_RGBA;
 
       rb->AllocStorage = _mesa_soft_renderbuffer_storage;
       _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb);
@@ -2071,6 +1959,8 @@ void
 _mesa_add_renderbuffer(struct gl_framebuffer *fb,
                        GLuint bufferName, struct gl_renderbuffer *rb)
 {
+   GLenum baseFormat;
+
    assert(fb);
    assert(rb);
    assert(bufferName < BUFFER_COUNT);
@@ -2095,7 +1985,8 @@ _mesa_add_renderbuffer(struct gl_framebuffer *fb,
     * and the device driver is expecting 8-bit values (GLubyte), we can
     * use a "renderbuffer adaptor/wrapper" to do the necessary conversions.
     */
-   if (rb->_BaseFormat == GL_RGBA) {
+   baseFormat = _mesa_get_format_base_format(rb->Format);
+   if (baseFormat == GL_RGBA) {
       if (CHAN_BITS == 16 && rb->DataType == GL_UNSIGNED_BYTE) {
          GET_CURRENT_CONTEXT(ctx);
          rb = _mesa_new_renderbuffer_16wrap8(ctx, rb);
@@ -2202,7 +2093,7 @@ _mesa_new_depthstencil_renderbuffer(GLcontext *ctx, GLuint name)
 
    /* init fields not covered by _mesa_new_renderbuffer() */
    dsrb->InternalFormat = GL_DEPTH24_STENCIL8_EXT;
-   dsrb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
+   dsrb->Format = MESA_FORMAT_Z24_S8;
    dsrb->AllocStorage = _mesa_soft_renderbuffer_storage;
 
    return dsrb;
diff --git a/src/mesa/main/texrender.c b/src/mesa/main/texrender.c
index c8b532acbb..e2432be6ca 100644
--- a/src/mesa/main/texrender.c
+++ b/src/mesa/main/texrender.c
@@ -497,30 +497,23 @@ update_wrapper(GLcontext *ctx, const struct gl_renderbuffer_attachment *att)
    trb->Base.InternalFormat = trb->TexImage->InternalFormat;
    /* XXX may need more special cases here */
    if (trb->TexImage->TexFormat == MESA_FORMAT_Z24_S8) {
-      trb->Base._ActualFormat = GL_DEPTH24_STENCIL8_EXT;
+      trb->Base.Format = MESA_FORMAT_Z24_S8;
       trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
    }
    else if (trb->TexImage->TexFormat == MESA_FORMAT_Z16) {
-      trb->Base._ActualFormat = GL_DEPTH_COMPONENT;
+      trb->Base.Format = MESA_FORMAT_Z16;
       trb->Base.DataType = GL_UNSIGNED_SHORT;
    }
    else if (trb->TexImage->TexFormat == MESA_FORMAT_Z32) {
-      trb->Base._ActualFormat = GL_DEPTH_COMPONENT;
+      trb->Base.Format = MESA_FORMAT_Z32;
       trb->Base.DataType = GL_UNSIGNED_INT;
    }
    else {
-      trb->Base._ActualFormat = trb->TexImage->InternalFormat;
+      trb->Base.Format = trb->TexImage->TexFormat;
       trb->Base.DataType = CHAN_TYPE;
    }
-   trb->Base._BaseFormat = trb->TexImage->_BaseFormat;
    trb->Base.Data = trb->TexImage->Data;
-
-   trb->Base.RedBits = _mesa_get_format_bits(texFormat, GL_TEXTURE_RED_SIZE);
-   trb->Base.GreenBits = _mesa_get_format_bits(texFormat, GL_TEXTURE_GREEN_SIZE);
-   trb->Base.BlueBits = _mesa_get_format_bits(texFormat, GL_TEXTURE_BLUE_SIZE);
-   trb->Base.AlphaBits = _mesa_get_format_bits(texFormat, GL_TEXTURE_ALPHA_SIZE);
-   trb->Base.DepthBits = _mesa_get_format_bits(texFormat, GL_TEXTURE_DEPTH_SIZE_ARB);
-   trb->Base.StencilBits = _mesa_get_format_bits(texFormat, GL_TEXTURE_STENCIL_SIZE_EXT);
+   trb->Base._BaseFormat = _mesa_base_fbo_format(ctx, trb->Base.InternalFormat);
 }