st/dri, st/xorg: fix buffers that have attachements of different depth

we actually need to specify the formats for different attachements, otherwise
if the color buffer is 24bpp and the app asks for 16bpp depth buffer than
we end up fetching the depth from the drawable which is 24bpp and end up
creating the wrong depth buffer. use the new getBuffersWithFormat extension
to pass the depth correctly.

2 files changed, 77 insertions, 31 deletions

diff --git a/src/gallium/state_trackers/dri/dri_drawable.c b/src/gallium/state_trackers/dri/dri_drawable.c
index ff21f2f9580..97277c05072 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.c
+++ b/src/gallium/state_trackers/dri/dri_drawable.c
@@ -132,14 +132,22 @@ dri_get_buffers(__DRIdrawable * dPriv)
    boolean have_depth = FALSE;
    int i, count;
 
-   buffers = (*dri_screen->dri2.loader->getBuffers) (dri_drawable,
-						     &dri_drawable->w,
-						     &dri_drawable->h,
-						     drawable->attachments,
-						     drawable->
-						     num_attachments, &count,
-						     dri_drawable->
-						     loaderPrivate);
+   if ((dri_screen->dri2.loader
+        && (dri_screen->dri2.loader->base.version > 2)
+        && (dri_screen->dri2.loader->getBuffersWithFormat != NULL)))
+      buffers = (*dri_screen->dri2.loader->getBuffersWithFormat)
+                (dri_drawable, &dri_drawable->w, &dri_drawable->h,
+                 drawable->attachments, drawable->num_attachments,
+                 &count, dri_drawable->loaderPrivate);
+   else
+      buffers = (*dri_screen->dri2.loader->getBuffers) (dri_drawable,
+                                                        &dri_drawable->w,
+                                                        &dri_drawable->h,
+                                                        drawable->attachments,
+                                                        drawable->
+                                                        num_attachments, &count,
+                                                        dri_drawable->
+                                                        loaderPrivate);
 
    if (buffers == NULL) {
       return;
@@ -346,12 +354,12 @@ dri_create_buffer(__DRIscreen * sPriv,
    case 24:
       if (visual->stencilBits == 0) {
 	 drawable->depth_stencil_format = (screen->d_depth_bits_last) ?
-	    PIPE_FORMAT_X8Z24_UNORM:
-	    PIPE_FORMAT_Z24X8_UNORM;
+                                          PIPE_FORMAT_X8Z24_UNORM:
+                                          PIPE_FORMAT_Z24X8_UNORM;
       } else {
 	 drawable->depth_stencil_format = (screen->sd_depth_bits_last) ?
-	    PIPE_FORMAT_S8Z24_UNORM:
-	    PIPE_FORMAT_Z24S8_UNORM;
+                                          PIPE_FORMAT_S8Z24_UNORM:
+                                          PIPE_FORMAT_Z24S8_UNORM;
       }
       break;
    case 32:
@@ -375,23 +383,49 @@ dri_create_buffer(__DRIscreen * sPriv,
    /* setup dri2 buffers information */
    /* TODO incase of double buffer visual, delay fake creation */
    i = 0;
-   drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
-   if (!screen->auto_fake_front)
-      drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
-   if (visual->doubleBufferMode)
-      drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
-   if (visual->depthBits && visual->stencilBits)
-      drawable->attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
-   else if (visual->depthBits)
-      drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
-   else if (visual->stencilBits)
-      drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
-   drawable->num_attachments = i;
+   if (sPriv->dri2.loader
+       && (sPriv->dri2.loader->base.version > 2)
+       && (sPriv->dri2.loader->getBuffersWithFormat != NULL)) {
+      drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
+      drawable->attachments[i++] = visual->rgbBits;
+      if (!screen->auto_fake_front)  {
+         drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
+         drawable->attachments[i++] = visual->rgbBits;
+      }
+      if (visual->doubleBufferMode) {
+         drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
+         drawable->attachments[i++] = visual->rgbBits;
+      }
+      if (visual->depthBits && visual->stencilBits) {
+         drawable->attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
+         drawable->attachments[i++] = visual->depthBits + visual->stencilBits;
+      } else if (visual->depthBits) {
+         drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
+         drawable->attachments[i++] = visual->depthBits;
+      } else if (visual->stencilBits) {
+         drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
+         drawable->attachments[i++] = visual->stencilBits;
+      }
+      drawable->num_attachments = i / 2;
+   } else {
+      drawable->attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
+      if (!screen->auto_fake_front)
+         drawable->attachments[i++] = __DRI_BUFFER_FAKE_FRONT_LEFT;
+      if (visual->doubleBufferMode)
+         drawable->attachments[i++] = __DRI_BUFFER_BACK_LEFT;
+      if (visual->depthBits && visual->stencilBits)
+         drawable->attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
+      else if (visual->depthBits)
+         drawable->attachments[i++] = __DRI_BUFFER_DEPTH;
+      else if (visual->stencilBits)
+         drawable->attachments[i++] = __DRI_BUFFER_STENCIL;
+      drawable->num_attachments = i;
+   }
 
    drawable->desired_fences = 2;
 
    return GL_TRUE;
- fail:
+fail:
    FREE(drawable);
    return GL_FALSE;
 }
diff --git a/src/gallium/state_trackers/xorg/xorg_dri2.c b/src/gallium/state_trackers/xorg/xorg_dri2.c
index 7457fe1c6d6..5b673924350 100644
--- a/src/gallium/state_trackers/xorg/xorg_dri2.c
+++ b/src/gallium/state_trackers/xorg/xorg_dri2.c
@@ -103,14 +103,26 @@ dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int form
 	    pipe_texture_reference(&tex, exa_priv->depth_stencil_tex);
         else {
 	    struct pipe_texture template;
+            unsigned depthBits = (format != 0) ? format : pDraw->depth;
 	    memset(&template, 0, sizeof(template));
 	    template.target = PIPE_TEXTURE_2D;
-	    if (buffer->attachment == DRI2BufferDepth)
-		template.format = ms->ds_depth_bits_last ?
-		    PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
-	    else
-		template.format = ms->ds_depth_bits_last ?
-		    PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
+	    if (buffer->attachment == DRI2BufferDepth) {
+               switch(depthBits) {
+               case 16:
+                  template.format = PIPE_FORMAT_Z16_UNORM;
+                  break;
+               case 32:
+                  template.format = PIPE_FORMAT_Z32_UNORM;
+                  break;
+               default:
+                  template.format = ms->ds_depth_bits_last ?
+                                    PIPE_FORMAT_X8Z24_UNORM : PIPE_FORMAT_Z24X8_UNORM;
+                  break;
+               }
+            } else {
+               template.format = ms->ds_depth_bits_last ?
+                                 PIPE_FORMAT_S8Z24_UNORM : PIPE_FORMAT_Z24S8_UNORM;
+            }
 	    template.width0 = pDraw->width;
 	    template.height0 = pDraw->height;
 	    template.depth0 = 1;