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-rw-r--r--src/mesa/swrast/s_context.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_context.h b/src/mesa/swrast/s_context.h
index 3391600e120..36ab86a5e84 100644
--- a/src/mesa/swrast/s_context.h
+++ b/src/mesa/swrast/s_context.h
@@ -430,6 +430,14 @@ _swrast_pixel_address(struct gl_renderbuffer *rb, GLint x, GLint y)
{
const GLint bpp = _mesa_get_format_bytes(rb->Format);
const GLint rowStride = rb->RowStride * bpp;
+ assert(x >= 0);
+ assert(y >= 0);
+ /* NOTE: using <= only because of s_tritemp.h which gets a pixel
+ * address but doesn't necessarily access it.
+ */
+ assert(x <= (GLint) rb->Width);
+ assert(y <= (GLint) rb->Height);
+ assert(rb->Data);
return (GLubyte *) rb->Data + y * rowStride + x * bpp;
}