Mesa (master): mesa: check if GL_ARB_copy_image is enabled in _mesa_CopyImageSubData()

[Brian Paul]

Module: Mesa
Branch: master
Commit: ffb8e884f7c466c36cf64bf56ff63c52a833fa66
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ffb8e884f7c466c36cf64bf56ff63c52a833fa66

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Aug 15 07:40:47 2014 -0600

mesa: check if GL_ARB_copy_image is enabled in _mesa_CopyImageSubData()

Generate a GL error and return rather than crashing on a null
ctx->Driver.CopyImageSubData pointer (gallium).  This allows apitraces
with glCopyImageSubData() calls to continue rather than crash.

Plus, fix a comment typo.

Reviewed-by: Jason Ekstrand <jason.ekstrand at intel.com>

---

 src/mesa/main/copyimage.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/copyimage.c b/src/mesa/main/copyimage.c
index dcbc83d..df7d7c2 100644
--- a/src/mesa/main/copyimage.c
+++ b/src/mesa/main/copyimage.c
@@ -277,6 +277,12 @@ _mesa_CopyImageSubData(GLuint srcName, GLenum srcTarget, GLint srcLevel,
                   dstX, dstY, dstZ,
                   srcWidth, srcHeight, srcWidth);
 
+   if (!ctx->Extensions.ARB_copy_image) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glCopyImageSubData(extension not available)");
+      return;
+   }
+
    if (!prepare_target(ctx, srcName, &srcTarget, srcLevel,
                        &srcTexObj, &srcTexImage, &tmpTexNames[0], "src"))
       goto cleanup;
@@ -328,7 +334,7 @@ _mesa_CopyImageSubData(GLuint srcName, GLenum srcTarget, GLint srcLevel,
                                                    srcTexImage->InternalFormat,
                                                    dstTexImage->InternalFormat)) {
    } else {
-      return; /* Error loged by _mesa_texture_view_compatible_format */
+      return; /* Error logged by _mesa_texture_view_compatible_format */
    }
 
    for (i = 0; i < srcDepth; ++i) {