3 files changed, 13 insertions, 14 deletions

diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c
index 7c799101d1..ce398b2b7f 100644
--- a/src/mesa/swrast/s_drawpix.c
+++ b/src/mesa/swrast/s_drawpix.c
@@ -561,8 +561,6 @@ draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
                    const struct gl_pixelstore_attrib *unpack,
                    const GLvoid *pixels )
 {
-   struct gl_renderbuffer *rb
-      = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
    const GLboolean scaleOrBias
       = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
    const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
@@ -578,7 +576,7 @@ draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
       _swrast_span_default_texcoords(ctx, &span);
 
    if (type == GL_UNSIGNED_SHORT
-       && rb->DepthBits == 16
+       && ctx->DrawBuffer->Visual.depthBits == 16
        && !scaleOrBias
        && !zoom
        && ctx->Visual.rgbMode
@@ -604,7 +602,7 @@ draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
             && ctx->Visual.rgbMode
             && width <= MAX_WIDTH) {
       /* Special case: shift 32-bit values down to Visual.depthBits */
-      const GLint shift = 32 - rb->DepthBits;
+      const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits;
       GLint row;
       for (row = 0; row < height; row++) {
          const GLuint *zSrc = (const GLuint *)
@@ -867,7 +865,7 @@ draw_depth_stencil_pixels(GLcontext *ctx, GLint x, GLint y,
                                GL_DEPTH_STENCIL_EXT, type, i, 0);
 
       if (ctx->Depth.Mask) {
-         if (!scaleOrBias && depthRb->DepthBits == 24) {
+         if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) {
             /* fast path 24-bit zbuffer */
             GLuint zValues[MAX_WIDTH];
             GLint j;
@@ -881,7 +879,7 @@ draw_depth_stencil_pixels(GLcontext *ctx, GLint x, GLint y,
             else
                depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues, NULL);
          }
-         else if (!scaleOrBias && depthRb->DepthBits == 16) {
+         else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) {
             /* fast path 16-bit zbuffer */
             GLushort zValues[MAX_WIDTH];
             GLint j;
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c
index 870242e855..1d83dbf1dc 100644
--- a/src/mesa/swrast/s_readpix.c
+++ b/src/mesa/swrast/s_readpix.c
@@ -101,7 +101,7 @@ read_depth_pixels( GLcontext *ctx,
 
    bias_or_scale = ctx->Pixel.DepthBias != 0.0 || ctx->Pixel.DepthScale != 1.0;
 
-   if (type == GL_UNSIGNED_SHORT && rb->DepthBits == 16
+   if (type == GL_UNSIGNED_SHORT && fb->Visual.depthBits == 16
        && !bias_or_scale && !packing->SwapBytes) {
       /* Special case: directly read 16-bit unsigned depth values. */
       GLint j;
@@ -113,7 +113,7 @@ read_depth_pixels( GLcontext *ctx,
          rb->GetRow(ctx, rb, width, x, y, dest);
       }
    }
-   else if (type == GL_UNSIGNED_INT && rb->DepthBits == 24
+   else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 24
             && !bias_or_scale && !packing->SwapBytes) {
       /* Special case: directly read 24-bit unsigned depth values. */
       GLint j;
@@ -131,7 +131,7 @@ read_depth_pixels( GLcontext *ctx,
          }
       }
    }
-   else if (type == GL_UNSIGNED_INT && rb->DepthBits == 32
+   else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 32
             && !bias_or_scale && !packing->SwapBytes) {
       /* Special case: directly read 32-bit unsigned depth values. */
       GLint j;
@@ -437,7 +437,8 @@ read_depth_stencil_pixels(GLcontext *ctx,
 
       _swrast_read_stencil_span(ctx, stencilRb, width, x, y + i, stencilVals);
 
-      if (!scaleOrBias && !stencilTransfer && depthRb->DepthBits == 24) {
+      if (!scaleOrBias && !stencilTransfer
+          && ctx->ReadBuffer->Visual.depthBits == 24) {
          /* ideal case */
          GLuint zVals[MAX_WIDTH]; /* 24-bit values! */
          GLint j;
diff --git a/src/mesa/swrast/s_texstore.c b/src/mesa/swrast/s_texstore.c
index fce20011d2..c0da83eb9f 100644
--- a/src/mesa/swrast/s_texstore.c
+++ b/src/mesa/swrast/s_texstore.c
@@ -164,13 +164,13 @@ read_depth_stencil_image(GLcontext *ctx, GLint x, GLint y,
    }
 
    /* put depth values into bits 0xffffff00 */
-   if (depthRb->DepthBits == 24) {
+   if (ctx->ReadBuffer->Visual.depthBits == 24) {
       GLint j;
       for (j = 0; j < width * height; j++) {
          image[j] <<= 8;
       }
    }
-   else if (depthRb->DepthBits == 16) {
+   else if (ctx->ReadBuffer->Visual.depthBits == 16) {
       GLint j;
       for (j = 0; j < width * height; j++) {
          image[j] = (image[j] << 16) | (image[j] & 0xff00);
@@ -178,8 +178,8 @@ read_depth_stencil_image(GLcontext *ctx, GLint x, GLint y,
    }
    else {
       /* this handles arbitrary depthBits >= 12 */
-      GLint lShift = 32 - depthRb->DepthBits;
-      GLint rShift = depthRb->DepthBits;
+      const GLint rShift = ctx->ReadBuffer->Visual.depthBits;
+      const GLint lShift = 32 - rShift;
       GLint j;
       for (j = 0; j < width * height; j++) {
          GLuint z = (image[j] << lShift);