From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Fri, 24 Jul 2015 00:18:57 +0000 (-0400)
Subject: mesa: fix error checking for getting zero-sized texture images
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f8059c9f3fdd270370737c9eff369eb6d14caa0b;p=mesa.git

mesa: fix error checking for getting zero-sized texture images

Commit 17f714836 (mesa: rearrange texture error checking order) moved
the width/height/depth == 0 allowance before checking if the image was
there. This was in part due to depth having to be == 1 for 2D images and
width having to be == 1 for 1D images. Instead relax the height/depth
checks to also accept 0 as valid.

With this change,

  bin/arb_direct_state_access-get-textures

starts passing again.

Fixes: 17f714836 (mesa: rearrange texture error checking order)
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Brian Paul <brianp@vmware.com>
---

diff --git a/src/mesa/main/texgetimage.c b/src/mesa/main/texgetimage.c
index cdbd6187708..c0ccce3d50e 100644
--- a/src/mesa/main/texgetimage.c
+++ b/src/mesa/main/texgetimage.c
@@ -928,13 +928,6 @@ dimensions_error_check(struct gl_context *ctx,
    const struct gl_texture_image *texImage;
    int i;
 
-   if (width == 0 || height == 0 || depth == 0) {
-      /* Not an error, but nothing to do.  Return 'true' so that the
-       * caller simply returns.
-       */
-      return true;
-   }
-
    if (xoffset < 0) {
       _mesa_error(ctx, GL_INVALID_VALUE, "%s(xoffset = %d)", caller, xoffset);
       return true;
@@ -973,7 +966,7 @@ dimensions_error_check(struct gl_context *ctx,
                      "%s(1D, yoffset = %d)", caller, yoffset);
          return true;
       }
-      if (height != 1) {
+      if (height > 1) {
          _mesa_error(ctx, GL_INVALID_VALUE,
                      "%s(1D, height = %d)", caller, height);
          return true;
@@ -987,7 +980,7 @@ dimensions_error_check(struct gl_context *ctx,
                      "%s(zoffset = %d)", caller, zoffset);
          return true;
       }
-      if (depth != 1) {
+      if (depth > 1) {
          _mesa_error(ctx, GL_INVALID_VALUE,
                      "%s(depth = %d)", caller, depth);
          return true;
@@ -1086,6 +1079,13 @@ dimensions_error_check(struct gl_context *ctx,
       }
    }
 
+   if (width == 0 || height == 0 || depth == 0) {
+      /* Not an error, but nothing to do.  Return 'true' so that the
+       * caller simply returns.
+       */
+      return true;
+   }
+
    return false;
 }