msaa: Generate proper error for operations prohibited on MSAA buffers.

From the GL 3.0 spec, section 4.3.3, in the documentation for
CopyPixels():

    "An INVALID_OPERATION error will be generated if the object bound
    to READ_FRAMEBUFFER_BINDING is framebuffer complete and the value
    of SAMPLE_BUFFERS is greater than zero."

The same applies to CopyTexImage...() and CopyTexSubImage...()
functions, since they are defined in terms of CopyPixels().

Previously we were generating an INVALID_FRAMEBUFFER_OPERATION error
in these cases.

Fixes piglit tests
"EXT_framebuffer_multisample/negative-{copypixels,copyteximage}".

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c
index def55dd..fdcbccc 100644 (file)
--- a/src/mesa/main/drawpix.c
+++ b/src/mesa/main/drawpix.c
@@ -240,7 +240,7 @@ _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
    }
 
    if (ctx->ReadBuffer->Name != 0 && ctx->ReadBuffer->Visual.samples > 0) {
-      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION,
+      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glCopyPixels(multisample FBO)");
       goto end;
    }

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 126386e..64b25a8 100644 (file)
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -2005,7 +2005,7 @@ copytexture_error_check( struct gl_context *ctx, GLuint dimensions,
       }
 
       if (ctx->ReadBuffer->Visual.samples > 0) {
-        _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION,
+        _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glCopyTexImage%dD(multisample FBO)",
                     dimensions);
         return GL_TRUE;
@@ -2130,7 +2130,7 @@ copytexsubimage_error_check1( struct gl_context *ctx, GLuint dimensions,
       }
 
       if (ctx->ReadBuffer->Visual.samples > 0) {
-        _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION,
+        _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glCopyTexSubImage%dD(multisample FBO)",
                     dimensions);
         return GL_TRUE;