dwrite: Validate buffer size passed to CreateAlphaTexture() against analysis texture type.

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dwrite: Validate buffer size passed to CreateAlphaTexture() against analysis texture type.
0a633908 · Nikolay Sivov · Alexandre Julliard · 55aedbff · 0a633908
Commit 0a633908 authored Sep 05, 2017 by Nikolay Sivov Committed by Alexandre Julliard Sep 05, 2017
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font.c dlls/dwrite/font.c +1 -1

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--- a/dlls/dwrite/font.c
+++ b/dlls/dwrite/font.c
@@ -5092,7 +5092,7 @@ static HRESULT WINAPI glyphrunanalysis_CreateAlphaTexture(IDWriteGlyphRunAnalysi

    /* make sure buffer is large enough for requested texture type */
    required = (bounds->right - bounds->left) * (bounds->bottom - bounds->top);
-    if (type == DWRITE_TEXTURE_CLEARTYPE_3x1)
+    if (This->texture_type == DWRITE_TEXTURE_CLEARTYPE_3x1)
        required *= 3;

    if (size < required)