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mesa: add/update comments in _mesa_copy_buffer_subdata()

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This commit is contained in:
Brian Paul
2012-01-07 14:16:27 -07:00
parent 2bdf93449a
commit 4c502e05e8
1 changed files with 4 additions and 1 deletions
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5
src/mesa/main/bufferobj.c
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@@ -504,7 +504,7 @@ _mesa_copy_buffer_subdata(struct gl_context *ctx,
{ {
void *srcPtr, *dstPtr; void *srcPtr, *dstPtr;
/* buffer should not already be mapped */ /* the buffers should not be mapped */
assert(!_mesa_bufferobj_mapped(src)); assert(!_mesa_bufferobj_mapped(src));
assert(!_mesa_bufferobj_mapped(dst)); assert(!_mesa_bufferobj_mapped(dst));
@@ -514,6 +514,9 @@ _mesa_copy_buffer_subdata(struct gl_context *ctx,
(GL_MAP_WRITE_BIT | (GL_MAP_WRITE_BIT |
GL_MAP_INVALIDATE_RANGE_BIT), dst); GL_MAP_INVALIDATE_RANGE_BIT), dst);
/* Note: the src and dst regions will never overlap. Trying to do so
* would generate GL_INVALID_VALUE earlier.
*/
if (srcPtr && dstPtr) if (srcPtr && dstPtr)
memcpy(dstPtr, srcPtr, size); memcpy(dstPtr, srcPtr, size);