From: Brian Paul <brianp@vmware.com>
Date: Mon, 16 Jan 2012 17:54:53 +0000 (-0700)
Subject: swrast: new assertions in _swrast_pixel_address()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=33257803d9083643ea9709c127933d5a2c4f1960;p=mesa.git

swrast: new assertions in _swrast_pixel_address()
---

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;
 }