Mesa (master): mesa: add missing error check for linear blit of integer colors

[Brian Paul]

Module: Mesa
Branch: master
Commit: 84c38c739e9faae86509eeec2bab4710813f9cc2
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=84c38c739e9faae86509eeec2bab4710813f9cc2

Author: Brian Paul <brianp at vmware.com>
Date:   Mon Jan  9 08:11:33 2012 -0700

mesa: add missing error check for linear blit of integer colors

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/main/fbobject.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 912170a..1d5e3da 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2742,6 +2742,19 @@ _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
       }
    }
 
+   if (filter == GL_LINEAR && (mask & GL_COLOR_BUFFER_BIT)) {
+      /* 3.1 spec, page 199:
+       * "Calling BlitFramebuffer will result in an INVALID_OPERATION error
+       * if filter is LINEAR and read buffer contains integer data."
+       */
+      GLenum type = _mesa_get_format_datatype(colorReadRb->Format);
+      if (type == GL_INT || type == GL_UNSIGNED_INT) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glBlitFramebufferEXT(integer color type)");
+         return;
+      }
+   }
+
    if (!ctx->Extensions.EXT_framebuffer_blit) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
       return;