1 files changed, 81 insertions, 0 deletions
diff --git a/gfx/tests/fuzz/TestCOLRv1.cpp b/gfx/tests/fuzz/TestCOLRv1.cpp
new file mode 100644
index 0000000000..9d8dc6186a
--- /dev/null
+++ b/gfx/tests/fuzz/TestCOLRv1.cpp
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "COLRFonts.h"
+#include "gfxFontUtils.h"
+#include "harfbuzz/hb.h"
+#include "MockDrawTarget.h"
+#include "MockScaledFont.h"
+#include "FuzzingInterface.h"
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+static int FuzzingRunCOLRv1(const uint8_t* data, size_t size) {
+  gfxFontUtils::AutoHBBlob hb_data_blob(hb_blob_create(
+      (const char*)data, size, HB_MEMORY_MODE_READONLY, nullptr, nullptr));
+
+  hb_face_t* hb_data_face = hb_face_create(hb_data_blob, 0);
+  if (!hb_data_face) {
+    return 0;
+  }
+
+  gfxFontUtils::AutoHBBlob colr(
+      hb_face_reference_table(hb_data_face, TRUETYPE_TAG('C', 'O', 'L', 'R')));
+  gfxFontUtils::AutoHBBlob cpal(
+      hb_face_reference_table(hb_data_face, TRUETYPE_TAG('C', 'P', 'A', 'L')));
+  if (!colr || !cpal || !COLRFonts::ValidateColorGlyphs(colr, cpal)) {
+    hb_face_destroy(hb_data_face);
+    return 0;
+  }
+
+  const float kPixelSize = 16.0f;
+  unsigned glyph_count = hb_face_get_glyph_count(hb_data_face);
+  hb_font_t* hb_data_font = hb_font_create(hb_data_face);
+  uint32_t scale = NS_round(kPixelSize * 65536.0);  // size as 16.16 fixed-point
+  hb_font_set_scale(hb_data_font, scale, scale);
+
+  RefPtr dt = new MockDrawTarget();
+  RefPtr uf = new MockUnscaledFont();
+  RefPtr sf = new MockScaledFont(uf, hb_data_font);
+  Float f2p = kPixelSize / hb_face_get_upem(hb_data_face);
+
+  UniquePtr<nsTArray<sRGBColor>> colorPalette =
+      COLRFonts::SetupColorPalette(hb_data_face, nullptr, nullptr, "dummy"_ns);
+
+  for (unsigned i = 0; i <= glyph_count; ++i) {
+    if (COLRFonts::GetColrTableVersion(colr) == 1) {
+      Rect bounds =
+          COLRFonts::GetColorGlyphBounds(colr, hb_data_font, i, dt, sf, f2p);
+      const auto* paintGraph = COLRFonts::GetGlyphPaintGraph(colr, i);
+      if (paintGraph) {
+        dt->PushClipRect(bounds);
+        COLRFonts::PaintGlyphGraph(colr, hb_data_font, paintGraph, dt, nullptr,
+                                   sf, DrawOptions(), Point(), sRGBColor(),
+                                   colorPalette.get(), i, f2p);
+        dt->PopClip();
+      }
+    }
+    const auto* layers = COLRFonts::GetGlyphLayers(colr, i);
+    if (layers) {
+      COLRFonts::PaintGlyphLayers(colr, hb_data_face, layers, dt, nullptr, sf,
+                                  DrawOptions(), Point(), sRGBColor(),
+                                  colorPalette.get());
+    }
+  }
+
+  hb_font_destroy(hb_data_font);
+  hb_face_destroy(hb_data_face);
+
+  return 0;
+}
+
+int FuzzingInitCOLRv1(int* argc, char*** argv) {
+  Preferences::SetBool("gfx.font_rendering.colr_v1.enabled", true);
+  return 0;
+}
+
+MOZ_FUZZING_INTERFACE_RAW(FuzzingInitCOLRv1, FuzzingRunCOLRv1, GfxCOLRv1);